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Tcl 2014 Conference, Portland/OR, US, Nov 10-14
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Overview
SHA1 Hash:c5d6c15df92bba345f4c7e2d7019e1344b6afd5d
Date: 2013-12-31 16:26:55
User: dkf
Comment:more peephole optimizations in TEBC, and better instruction execution traces
Tags And Properties
Changes

Changes to generic/tclExecute.c

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	break;							\
    }
#   define TRACE_APPEND(a) \
    while (traceInstructions) {		\
	printf a;			\
	break;				\
    }


#   define TRACE_WITH_OBJ(a, objPtr) \
    while (traceInstructions) {					\
	fprintf(stdout, "%2d: %2d (%u) %s ", iPtr->numLevels,	\
		(int) CURR_DEPTH,				\
		(unsigned) (pc - codePtr->codeStart),		\
		GetOpcodeName(pc));				\
	printf a;						\
................................................................................
	break;							\
    }
#   define O2S(objPtr) \
    (objPtr ? TclGetString(objPtr) : "")
#else /* !TCL_COMPILE_DEBUG */
#   define TRACE(a)
#   define TRACE_APPEND(a)

#   define TRACE_WITH_OBJ(a, objPtr)
#   define O2S(objPtr)
#endif /* TCL_COMPILE_DEBUG */

/*
 * DTrace instruction probe macros.
 */
................................................................................
	/*
	 * Make sure that the element at stackTop is a list; if not, just
	 * leave with an error. Note that the element from the expand list
	 * will be removed at checkForCatch.
	 */

	objPtr = OBJ_AT_TOS;

	if (TclListObjGetElements(interp, objPtr, &objc, &objv) != TCL_OK) {
	    TRACE_WITH_OBJ(("%.30s => ERROR: ", O2S(objPtr)),
		    Tcl_GetObjResult(interp));
	    goto gotError;
	}
	(void) POP_OBJECT();

	/*
	 * Make sure there is enough room in the stack to expand this list
	 * *and* process the rest of the command (at least up to the next
................................................................................
	 * that it has a freeIntRepProc we use Tcl_DecrRefCount().
	 */

	for (i = 0; i < objc; i++) {
	    PUSH_OBJECT(objv[i]);
	}


	Tcl_DecrRefCount(objPtr);
	NEXT_INST_F(5, 0, 0);
    }

    case INST_EXPR_STK: {
	ByteCode *newCodePtr;

................................................................................
		TRACE_APPEND(("%.30s\n", O2S(objResultPtr)));
		NEXT_INST_F(pcAdjustment, 1, 1);
	    }
	}
	varPtr = TclLookupArrayElement(interp, part1Ptr, part2Ptr,
		TCL_LEAVE_ERR_MSG, "read", 0, 1, arrayPtr, opnd);
	if (varPtr == NULL) {
	    TRACE_APPEND(("ERROR: %.30s\n", O2S(Tcl_GetObjResult(interp))));
	    goto gotError;
	}
	cleanup = 1;
	goto doCallPtrGetVar;

    case INST_LOAD_ARRAY_STK:
	cleanup = 2;
................................................................................

    doLoadStk:
	part1Ptr = objPtr;
	varPtr = TclObjLookupVarEx(interp, part1Ptr, part2Ptr,
		TCL_LEAVE_ERR_MSG, "read", /*createPart1*/0, /*createPart2*/1,
		&arrayPtr);
	if (!varPtr) {
	    TRACE_APPEND(("ERROR: %.30s\n", O2S(Tcl_GetObjResult(interp))));
	    goto gotError;
	}

	if (TclIsVarDirectReadable2(varPtr, arrayPtr)) {
	    /*
	     * No errors, no traces: just get the value.
	     */
................................................................................
	 */

	DECACHE_STACK_INFO();
	objResultPtr = TclPtrGetVar(interp, varPtr, arrayPtr,
		part1Ptr, part2Ptr, TCL_LEAVE_ERR_MSG, opnd);
	CACHE_STACK_INFO();
	if (!objResultPtr) {
	    TRACE_APPEND(("ERROR: %.30s\n", O2S(Tcl_GetObjResult(interp))));
	    goto gotError;
	}
	TRACE_APPEND(("%.30s\n", O2S(objResultPtr)));
	NEXT_INST_V(pcAdjustment, cleanup, 1);

    /*
     *	   End of INST_LOAD instructions.
................................................................................
	    TRACE(("\"%.30s(%.30s)\" <- \"%.30s\" => ",
		    O2S(part1Ptr), O2S(part2Ptr), O2S(valuePtr)));
	}
#endif
	varPtr = TclObjLookupVarEx(interp, objPtr,part2Ptr, TCL_LEAVE_ERR_MSG,
		"set", /*createPart1*/ 1, /*createPart2*/ 1, &arrayPtr);
	if (!varPtr) {
	    TRACE_APPEND(("ERROR: %.30s\n", O2S(Tcl_GetObjResult(interp))));
	    goto gotError;
	}
	cleanup = ((part2Ptr == NULL)? 2 : 3);
	pcAdjustment = 1;
	opnd = -1;
	goto doCallPtrSetVar;

................................................................................
	cleanup = 2;
	part1Ptr = NULL;

    doStoreArrayDirectFailed:
	varPtr = TclLookupArrayElement(interp, part1Ptr, part2Ptr,
		TCL_LEAVE_ERR_MSG, "set", 1, 1, arrayPtr, opnd);
	if (!varPtr) {
	    TRACE_APPEND(("ERROR: %.30s\n", O2S(Tcl_GetObjResult(interp))));
	    goto gotError;
	}
	goto doCallPtrSetVar;

    case INST_LAPPEND_SCALAR4:
	opnd = TclGetUInt4AtPtr(pc+1);
	pcAdjustment = 5;
................................................................................

    doCallPtrSetVar:
	DECACHE_STACK_INFO();
	objResultPtr = TclPtrSetVar(interp, varPtr, arrayPtr,
		part1Ptr, part2Ptr, valuePtr, storeFlags, opnd);
	CACHE_STACK_INFO();
	if (!objResultPtr) {
	    TRACE_APPEND(("ERROR: %.30s\n", O2S(Tcl_GetObjResult(interp))));
	    goto gotError;
	}
#ifndef TCL_COMPILE_DEBUG
	if (*(pc+pcAdjustment) == INST_POP) {
	    NEXT_INST_V((pcAdjustment+1), cleanup, 0);
	}
#endif
................................................................................
	part1Ptr = objPtr;
	opnd = -1;
	varPtr = TclObjLookupVarEx(interp, objPtr, part2Ptr,
		TCL_LEAVE_ERR_MSG, "read", 1, 1, &arrayPtr);
	if (!varPtr) {
	    Tcl_AddErrorInfo(interp,
		    "\n    (reading value of variable to increment)");
	    TRACE_APPEND(("ERROR: %.30s\n", O2S(Tcl_GetObjResult(interp))));
	    Tcl_DecrRefCount(incrPtr);
	    goto gotError;
	}
	cleanup = ((part2Ptr == NULL)? 1 : 2);
	goto doIncrVar;

    case INST_INCR_ARRAY1_IMM:
................................................................................
	while (TclIsVarLink(arrayPtr)) {
	    arrayPtr = arrayPtr->value.linkPtr;
	}
	TRACE(("%u \"%.30s\" (by %ld) => ", opnd, O2S(part2Ptr), increment));
	varPtr = TclLookupArrayElement(interp, part1Ptr, part2Ptr,
		TCL_LEAVE_ERR_MSG, "read", 1, 1, arrayPtr, opnd);
	if (!varPtr) {
	    TRACE_APPEND(("ERROR: %.30s\n", O2S(Tcl_GetObjResult(interp))));
	    Tcl_DecrRefCount(incrPtr);
	    goto gotError;
	}
	goto doIncrVar;

    case INST_INCR_SCALAR1_IMM:
	opnd = TclGetUInt1AtPtr(pc+1);
................................................................................
		varPtr->value.objPtr = objResultPtr;
	    } else {
		objResultPtr = objPtr;
	    }
	    TclNewLongObj(incrPtr, increment);
	    if (TclIncrObj(interp, objResultPtr, incrPtr) != TCL_OK) {
		Tcl_DecrRefCount(incrPtr);
		TRACE_APPEND(("ERROR: %.30s\n",
			O2S(Tcl_GetObjResult(interp))));
		goto gotError;
	    }
	    Tcl_DecrRefCount(incrPtr);
	    goto doneIncr;
	}

	/*
................................................................................
		Tcl_IncrRefCount(objResultPtr);
		varPtr->value.objPtr = objResultPtr;
	    } else {
		objResultPtr = objPtr;
	    }
	    if (TclIncrObj(interp, objResultPtr, incrPtr) != TCL_OK) {
		Tcl_DecrRefCount(incrPtr);
		TRACE_APPEND(("ERROR: %.30s\n",
			O2S(Tcl_GetObjResult(interp))));
		goto gotError;
	    }
	    Tcl_DecrRefCount(incrPtr);
	} else {
	    DECACHE_STACK_INFO();
	    objResultPtr = TclPtrIncrObjVar(interp, varPtr, arrayPtr,
		    part1Ptr, part2Ptr, incrPtr, TCL_LEAVE_ERR_MSG, opnd);
	    CACHE_STACK_INFO();
	    Tcl_DecrRefCount(incrPtr);
	    if (objResultPtr == NULL) {
		TRACE_APPEND(("ERROR: %.30s\n",
			O2S(Tcl_GetObjResult(interp))));
		goto gotError;
	    }
	}
    doneIncr:
	TRACE_APPEND(("%.30s\n", O2S(objResultPtr)));
#ifndef TCL_COMPILE_DEBUG
	if (*(pc+pcAdjustment) == INST_POP) {
................................................................................
    /*
     *	   End of INST_INCR instructions.
     * -----------------------------------------------------------------
     *	   Start of INST_EXIST instructions.
     */

    case INST_EXIST_SCALAR:


	opnd = TclGetUInt4AtPtr(pc+1);
	varPtr = LOCAL(opnd);
	while (TclIsVarLink(varPtr)) {
	    varPtr = varPtr->value.linkPtr;
	}
	TRACE(("%u => ", opnd));
	if (ReadTraced(varPtr)) {
................................................................................
		    TCL_TRACE_READS, 0, opnd);
	    CACHE_STACK_INFO();
	    if (TclIsVarUndefined(varPtr)) {
		TclCleanupVar(varPtr, NULL);
		varPtr = NULL;
	    }
	}


	/*
	 * Tricky! Arrays always exist.
	 */

	objResultPtr = TCONST(!varPtr || TclIsVarUndefined(varPtr) ? 0 : 1);
	TRACE_APPEND(("%.30s\n", O2S(objResultPtr)));
	NEXT_INST_F(5, 0, 1);

    case INST_EXIST_ARRAY:


	opnd = TclGetUInt4AtPtr(pc+1);
	part2Ptr = OBJ_AT_TOS;
	arrayPtr = LOCAL(opnd);
	while (TclIsVarLink(arrayPtr)) {
	    arrayPtr = arrayPtr->value.linkPtr;
	}
	TRACE(("%u \"%.30s\" => ", opnd, O2S(part2Ptr)));
	if (TclIsVarArray(arrayPtr) && !ReadTraced(arrayPtr)) {
	    varPtr = VarHashFindVar(arrayPtr->value.tablePtr, part2Ptr);
	    if (!varPtr || !ReadTraced(varPtr)) {
		goto doneExistArray;
	    }
	}
	varPtr = TclLookupArrayElement(interp, NULL, part2Ptr, 0, "access",
		0, 1, arrayPtr, opnd);
	if (varPtr) {
	    if (ReadTraced(varPtr) || (arrayPtr && ReadTraced(arrayPtr))) {
		DECACHE_STACK_INFO();
................................................................................
		CACHE_STACK_INFO();
	    }
	    if (TclIsVarUndefined(varPtr)) {
		TclCleanupVar(varPtr, arrayPtr);
		varPtr = NULL;
	    }
	}
    doneExistArray:
	objResultPtr = TCONST(!varPtr || TclIsVarUndefined(varPtr) ? 0 : 1);
	TRACE_APPEND(("%.30s\n", O2S(objResultPtr)));
	NEXT_INST_F(5, 1, 1);

    case INST_EXIST_ARRAY_STK:
	cleanup = 2;

	part2Ptr = OBJ_AT_TOS;		/* element name */
	part1Ptr = OBJ_UNDER_TOS;	/* array name */
	TRACE(("\"%.30s(%.30s)\" => ", O2S(part1Ptr), O2S(part2Ptr)));
	goto doExistStk;

    case INST_EXIST_STK:
	cleanup = 1;

	part2Ptr = NULL;
	part1Ptr = OBJ_AT_TOS;		/* variable name */
	TRACE(("\"%.30s\" => ", O2S(part1Ptr)));

    doExistStk:
	varPtr = TclObjLookupVarEx(interp, part1Ptr, part2Ptr, 0, "access",
		/*createPart1*/0, /*createPart2*/1, &arrayPtr);
................................................................................
		CACHE_STACK_INFO();
	    }
	    if (TclIsVarUndefined(varPtr)) {
		TclCleanupVar(varPtr, arrayPtr);
		varPtr = NULL;
	    }
	}






	objResultPtr = TCONST(!varPtr || TclIsVarUndefined(varPtr) ? 0 : 1);















	TRACE_APPEND(("%.30s\n", O2S(objResultPtr)));
	NEXT_INST_V(1, cleanup, 1);


    /*
     *	   End of INST_EXIST instructions.
     * -----------------------------------------------------------------
     *	   Start of INST_UNSET instructions.
     */

................................................................................
    case INST_UNSET_SCALAR:
	flags = TclGetUInt1AtPtr(pc+1) ? TCL_LEAVE_ERR_MSG : 0;
	opnd = TclGetUInt4AtPtr(pc+2);
	varPtr = LOCAL(opnd);
	while (TclIsVarLink(varPtr)) {
	    varPtr = varPtr->value.linkPtr;
	}
	TRACE(("%s %u\n", (flags?"normal":"noerr"), opnd));
	if (TclIsVarDirectUnsettable(varPtr) && !TclIsVarInHash(varPtr)) {
	    /*
	     * No errors, no traces, no searches: just make the variable cease
	     * to exist.
	     */

	    if (!TclIsVarUndefined(varPtr)) {
		TclDecrRefCount(varPtr->value.objPtr);
	    } else if (flags & TCL_LEAVE_ERR_MSG) {
		goto slowUnsetScalar;
	    }
	    varPtr->value.objPtr = NULL;

	    NEXT_INST_F(6, 0, 0);
	}

    slowUnsetScalar:
	DECACHE_STACK_INFO();
	if (TclPtrUnsetVar(interp, varPtr, NULL, NULL, NULL, flags,
		opnd) != TCL_OK && flags) {
................................................................................
	flags = TclGetUInt1AtPtr(pc+1) ? TCL_LEAVE_ERR_MSG : 0;
	opnd = TclGetUInt4AtPtr(pc+2);
	part2Ptr = OBJ_AT_TOS;
	arrayPtr = LOCAL(opnd);
	while (TclIsVarLink(arrayPtr)) {
	    arrayPtr = arrayPtr->value.linkPtr;
	}
	TRACE(("%s %u \"%.30s\"\n",
		(flags ? "normal" : "noerr"), opnd, O2S(part2Ptr)));
	if (TclIsVarArray(arrayPtr) && !UnsetTraced(arrayPtr)) {
	    varPtr = VarHashFindVar(arrayPtr->value.tablePtr, part2Ptr);
	    if (varPtr && TclIsVarDirectUnsettable(varPtr)) {
		/*
		 * No nasty traces and element exists, so we can proceed to
		 * unset it. Might still not exist though...
................................................................................

		if (!TclIsVarUndefined(varPtr)) {
		    TclDecrRefCount(varPtr->value.objPtr);
		} else if (flags & TCL_LEAVE_ERR_MSG) {
		    goto slowUnsetArray;
		}
		varPtr->value.objPtr = NULL;

		NEXT_INST_F(6, 1, 0);
	    } else if (!varPtr && !(flags & TCL_LEAVE_ERR_MSG)) {
		/*
		 * Don't need to do anything here.
		 */


		NEXT_INST_F(6, 1, 0);
	    }
	}
    slowUnsetArray:
	DECACHE_STACK_INFO();
	varPtr = TclLookupArrayElement(interp, NULL, part2Ptr, flags, "unset",
		0, 0, arrayPtr, opnd);
................................................................................
	NEXT_INST_F(6, 1, 0);

    case INST_UNSET_ARRAY_STK:
	flags = TclGetUInt1AtPtr(pc+1) ? TCL_LEAVE_ERR_MSG : 0;
	cleanup = 2;
	part2Ptr = OBJ_AT_TOS;		/* element name */
	part1Ptr = OBJ_UNDER_TOS;	/* array name */
	TRACE(("%s \"%.30s(%.30s)\"\n", (flags?"normal":"noerr"),
		O2S(part1Ptr), O2S(part2Ptr)));
	goto doUnsetStk;

    case INST_UNSET_STK:
	flags = TclGetUInt1AtPtr(pc+1) ? TCL_LEAVE_ERR_MSG : 0;
	cleanup = 1;
	part2Ptr = NULL;
	part1Ptr = OBJ_AT_TOS;		/* variable name */
	TRACE(("%s \"%.30s\"\n", (flags?"normal":"noerr"), O2S(part1Ptr)));

    doUnsetStk:
	DECACHE_STACK_INFO();
	if (TclObjUnsetVar2(interp, part1Ptr, part2Ptr, flags) != TCL_OK
		&& (flags & TCL_LEAVE_ERR_MSG)) {
	    goto errorInUnset;
	}
	CACHE_STACK_INFO();

	NEXT_INST_V(2, cleanup, 0);

    errorInUnset:
	CACHE_STACK_INFO();
	TRACE_APPEND(("ERROR: %.30s\n", O2S(Tcl_GetObjResult(interp))));
	goto gotError;

	/*
	 * This is really an unset operation these days. Do not issue.
	 */

    case INST_DICT_DONE:
................................................................................
		&& (TclIsVarArray(varPtr) || TclIsVarUndefined(varPtr))) {
	    DECACHE_STACK_INFO();
	    result = TclObjCallVarTraces(iPtr, arrayPtr, varPtr, part1Ptr,
		    NULL, (TCL_LEAVE_ERR_MSG|TCL_NAMESPACE_ONLY|
		    TCL_GLOBAL_ONLY|TCL_TRACE_ARRAY), 1, opnd);
	    CACHE_STACK_INFO();
	    if (result == TCL_ERROR) {
		TRACE_APPEND(("ERROR: %.30s\n",
			O2S(Tcl_GetObjResult(interp))));
		goto gotError;
	    }
	}
	if (varPtr && TclIsVarArray(varPtr) && !TclIsVarUndefined(varPtr)) {
	    objResultPtr = TCONST(1);
	} else {
	    objResultPtr = TCONST(0);
................................................................................
	pcAdjustment = 1;
	cleanup = 1;
	part1Ptr = OBJ_AT_TOS;
	TRACE(("\"%.30s\" => ", O2S(part1Ptr)));
	varPtr = TclObjLookupVarEx(interp, part1Ptr, NULL, TCL_LEAVE_ERR_MSG,
		"set", /*createPart1*/1, /*createPart2*/0, &arrayPtr);
	if (varPtr == NULL) {
	    TRACE_APPEND(("ERROR: %.30s\n", O2S(Tcl_GetObjResult(interp))));
	    goto gotError;
	}
    doArrayMake:
	if (varPtr && !TclIsVarArray(varPtr)) {
	    if (TclIsVarArrayElement(varPtr) || !TclIsVarUndefined(varPtr)) {
		/*
		 * Either an array element, or a scalar: lose!
		 */

		TclObjVarErrMsg(interp, part1Ptr, NULL, "array set",
			"variable isn't array", opnd);
		Tcl_SetErrorCode(interp, "TCL", "WRITE", "ARRAY", NULL);
		TRACE_APPEND(("ERROR: bad array ref: %.30s\n",
			O2S(Tcl_GetObjResult(interp))));
		goto gotError;
	    }
	    TclSetVarArray(varPtr);
	    varPtr->value.tablePtr = ckalloc(sizeof(TclVarHashTable));
	    TclInitVarHashTable(varPtr->value.tablePtr,
		    TclGetVarNsPtr(varPtr));
#ifdef TCL_COMPILE_DEBUG
................................................................................
    {
	Var *otherPtr;
	CallFrame *framePtr, *savedFramePtr;
	Tcl_Namespace *nsPtr;
	Namespace *savedNsPtr;

    case INST_UPVAR:
	TRACE_WITH_OBJ(("upvar "), OBJ_UNDER_TOS);


	if (TclObjGetFrame(interp, OBJ_UNDER_TOS, &framePtr) == -1) {

	    goto gotError;
	}

	/*
	 * Locate the other variable.
	 */

................................................................................
	savedFramePtr = iPtr->varFramePtr;
	iPtr->varFramePtr = framePtr;
	otherPtr = TclObjLookupVarEx(interp, OBJ_AT_TOS, NULL,
		TCL_LEAVE_ERR_MSG, "access", /*createPart1*/ 1,
		/*createPart2*/ 1, &varPtr);
	iPtr->varFramePtr = savedFramePtr;
	if (!otherPtr) {

	    goto gotError;
	}
	goto doLinkVars;

    case INST_NSUPVAR:
	TRACE_WITH_OBJ(("nsupvar "), OBJ_UNDER_TOS);

	if (TclGetNamespaceFromObj(interp, OBJ_UNDER_TOS, &nsPtr) != TCL_OK) {

	    goto gotError;
	}

	/*
	 * Locate the other variable.
	 */

................................................................................
	savedNsPtr = iPtr->varFramePtr->nsPtr;
	iPtr->varFramePtr->nsPtr = (Namespace *) nsPtr;
	otherPtr = TclObjLookupVarEx(interp, OBJ_AT_TOS, NULL,
		(TCL_NAMESPACE_ONLY | TCL_LEAVE_ERR_MSG), "access",
		/*createPart1*/ 1, /*createPart2*/ 1, &varPtr);
	iPtr->varFramePtr->nsPtr = savedNsPtr;
	if (!otherPtr) {

	    goto gotError;
	}
	goto doLinkVars;

    case INST_VARIABLE:
	TRACE(("variable "));
	otherPtr = TclObjLookupVarEx(interp, OBJ_AT_TOS, NULL,
		(TCL_NAMESPACE_ONLY | TCL_LEAVE_ERR_MSG), "access",
		/*createPart1*/ 1, /*createPart2*/ 1, &varPtr);
	if (!otherPtr) {

	    goto gotError;
	}

	/*
	 * Do the [variable] magic.
	 */

................................................................................

	/*
	 * If we are here, the local variable has already been created: do the
	 * little work of TclPtrMakeUpvar that remains to be done right here
	 * if there are no errors; otherwise, let it handle the case.
	 */

	opnd = TclGetInt4AtPtr(pc+1);;
	varPtr = LOCAL(opnd);
	if ((varPtr != otherPtr) && !TclIsVarTraced(varPtr)
		&& (TclIsVarUndefined(varPtr) || TclIsVarLink(varPtr))) {
	    if (!TclIsVarUndefined(varPtr)) {
		/*
		 * Then it is a defined link.
		 */

		Var *linkPtr = varPtr->value.linkPtr;

		if (linkPtr == otherPtr) {

		    NEXT_INST_F(5, 1, 0);
		}
		if (TclIsVarInHash(linkPtr)) {
		    VarHashRefCount(linkPtr)--;
		    if (TclIsVarUndefined(linkPtr)) {
			TclCleanupVar(linkPtr, NULL);
		    }
................................................................................
	    TclSetVarLink(varPtr);
	    varPtr->value.linkPtr = otherPtr;
	    if (TclIsVarInHash(otherPtr)) {
		VarHashRefCount(otherPtr)++;
	    }
	} else if (TclPtrObjMakeUpvar(interp, otherPtr, NULL, 0,
		opnd) != TCL_OK) {

	    goto gotError;
	}

	/*
	 * Do not pop the namespace or frame index, it may be needed for other
	 * variables - and [variable] did not push it at all.
	 */


	NEXT_INST_F(5, 1, 0);
    }

    /*
     *	   End of variable linking instructions.
     * -----------------------------------------------------------------
     */
................................................................................

    case INST_JUMP_TRUE1:
	jmpOffset[0] = 2;
	jmpOffset[1] = TclGetInt1AtPtr(pc+1);

    doCondJump:
	valuePtr = OBJ_AT_TOS;



	/* TODO - check claim that taking address of b harms performance */
	/* TODO - consider optimization search for constants */
	if (TclGetBooleanFromObj(interp, valuePtr, &b) != TCL_OK) {
	    TRACE_WITH_OBJ(("%d => ERROR: ", jmpOffset[
		    ((*pc == INST_JUMP_FALSE1) || (*pc == INST_JUMP_FALSE4))
		    ? 0 : 1]), Tcl_GetObjResult(interp));
	    goto gotError;
	}

#ifdef TCL_COMPILE_DEBUG
	if (b) {
	    if ((*pc == INST_JUMP_TRUE1) || (*pc == INST_JUMP_TRUE4)) {
		TRACE(("%d => %.20s true, new pc %u\n", jmpOffset[1],
			O2S(valuePtr),
			(unsigned)(pc + jmpOffset[1] - codePtr->codeStart)));
	    } else {
		TRACE(("%d => %.20s true\n", jmpOffset[0], O2S(valuePtr)));

	    }
	} else {
	    if ((*pc == INST_JUMP_TRUE1) || (*pc == INST_JUMP_TRUE4)) {
		TRACE(("%d => %.20s false\n", jmpOffset[0], O2S(valuePtr)));
	    } else {
		TRACE(("%d => %.20s false, new pc %u\n", jmpOffset[0],
			O2S(valuePtr),
			(unsigned)(pc + jmpOffset[0] - codePtr->codeStart)));
	    }
	}
#endif
	NEXT_INST_F(jmpOffset[b], 1, 0);
    }

................................................................................
	/*
	 * Jump to location looked up in a hashtable; fall through to next
	 * instr if lookup fails.
	 */

	opnd = TclGetInt4AtPtr(pc+1);
	jtPtr = (JumptableInfo *) codePtr->auxDataArrayPtr[opnd].clientData;
	TRACE(("%d => %.20s ", opnd, O2S(OBJ_AT_TOS)));
	hPtr = Tcl_FindHashEntry(&jtPtr->hashTable, TclGetString(OBJ_AT_TOS));
	if (hPtr != NULL) {
	    int jumpOffset = PTR2INT(Tcl_GetHashValue(hPtr));

	    TRACE_APPEND(("found in table, new pc %u\n",
		    (unsigned)(pc - codePtr->codeStart + jumpOffset)));
	    NEXT_INST_F(jumpOffset, 1, 0);
................................................................................
	TRACE_WITH_OBJ(("=> "), objResultPtr);
	NEXT_INST_F(1, 0, 1);
    case INST_INFO_LEVEL_ARGS: {
	int level;
	register CallFrame *framePtr = iPtr->varFramePtr;
	register CallFrame *rootFramePtr = iPtr->rootFramePtr;

	valuePtr = OBJ_AT_TOS;
	if (TclGetIntFromObj(interp, valuePtr, &level) != TCL_OK) {
	    TRACE_WITH_OBJ(("%.30s => ERROR: ", O2S(valuePtr)),
		    Tcl_GetObjResult(interp));
	    goto gotError;
	}
	TRACE(("%d => ", level));
	if (level <= 0) {
	    level += framePtr->level;
	}
	for (; (framePtr->level!=level) && (framePtr!=rootFramePtr) ;
		framePtr = framePtr->callerVarPtr) {
	    /* Empty loop body */
	}
	if (framePtr == rootFramePtr) {
	    Tcl_AppendResult(interp, "bad level \"", TclGetString(valuePtr),
		    "\"", NULL);
	    TRACE_APPEND(("ERROR: bad level\n"));
	    Tcl_SetErrorCode(interp, "TCL", "LOOKUP", "STACK_LEVEL",
		    TclGetString(valuePtr), NULL);
	    goto gotError;
	}
	objResultPtr = Tcl_NewListObj(framePtr->objc, framePtr->objv);
	TRACE_APPEND(("%.30s\n", O2S(objResultPtr)));
	NEXT_INST_F(1, 1, 1);
    }
    case INST_RESOLVE_COMMAND: {
................................................................................

	opnd = TclGetUInt4AtPtr(pc+1);
	objResultPtr = Tcl_NewListObj(opnd, &OBJ_AT_DEPTH(opnd-1));
	TRACE_WITH_OBJ(("%u => ", opnd), objResultPtr);
	NEXT_INST_V(5, opnd, 1);

    case INST_LIST_LENGTH:
	valuePtr = OBJ_AT_TOS;
	if (TclListObjLength(interp, valuePtr, &length) != TCL_OK) {
	    TRACE_WITH_OBJ(("%.30s => ERROR: ", O2S(valuePtr)),
		    Tcl_GetObjResult(interp));
	    goto gotError;
	}
	TclNewIntObj(objResultPtr, length);
	TRACE(("%.20s => %d\n", O2S(valuePtr), length));
	NEXT_INST_F(1, 1, 1);

    case INST_LIST_INDEX:	/* lindex with objc == 3 */
	value2Ptr = OBJ_AT_TOS;
	valuePtr = OBJ_UNDER_TOS;


	/*
	 * Extract the desired list element.
	 */

	if ((TclListObjGetElements(interp, valuePtr, &objc, &objv) == TCL_OK)
		&& (value2Ptr->typePtr != &tclListType)
................................................................................
	    tosPtr--;
	    pcAdjustment = 1;
	    goto lindexFastPath;
	}

	objResultPtr = TclLindexList(interp, valuePtr, value2Ptr);
	if (!objResultPtr) {
	    TRACE_WITH_OBJ(("%.30s %.30s => ERROR: ", O2S(valuePtr),
		    O2S(value2Ptr)), Tcl_GetObjResult(interp));
	    goto gotError;
	}

	/*
	 * Stash the list element on the stack.
	 */

	TRACE(("%.20s %.20s => %s\n",
		O2S(valuePtr), O2S(value2Ptr), O2S(objResultPtr)));
	NEXT_INST_F(1, 2, -1);	/* Already has the correct refCount */

    case INST_LIST_INDEX_IMM:	/* lindex with objc==3 and index in bytecode
				 * stream */

	/*
	 * Pop the list and get the index.
	 */

	valuePtr = OBJ_AT_TOS;
	opnd = TclGetInt4AtPtr(pc+1);


	/*
	 * Get the contents of the list, making sure that it really is a list
	 * in the process.
	 */

	if (TclListObjGetElements(interp, valuePtr, &objc, &objv) != TCL_OK) {
	    TRACE_WITH_OBJ(("\"%.30s\" %d => ERROR: ", O2S(valuePtr), opnd),
		    Tcl_GetObjResult(interp));
	    goto gotError;
	}

	/*
	 * Select the list item based on the index. Negative operand means
	 * end-based indexing.
	 */
................................................................................
    lindexFastPath:
	if (index >= 0 && index < objc) {
	    objResultPtr = objv[index];
	} else {
	    TclNewObj(objResultPtr);
	}

	TRACE_WITH_OBJ(("\"%.30s\" %d => ", O2S(valuePtr), opnd),
		objResultPtr);
	NEXT_INST_F(pcAdjustment, 1, 1);

    case INST_LIST_INDEX_MULTI:	/* 'lindex' with multiple index args */
	/*
	 * Determine the count of index args.
	 */

................................................................................
	opnd = TclGetUInt4AtPtr(pc+1);
	numIndices = opnd-1;

	/*
	 * Do the 'lindex' operation.
	 */


	objResultPtr = TclLindexFlat(interp, OBJ_AT_DEPTH(numIndices),
		numIndices, &OBJ_AT_DEPTH(numIndices - 1));
	if (!objResultPtr) {
	    TRACE_WITH_OBJ(("%d => ERROR: ", opnd), Tcl_GetObjResult(interp));
	    goto gotError;
	}

	/*
	 * Set result.
	 */

	TRACE(("%d => %s\n", opnd, O2S(objResultPtr)));
	NEXT_INST_V(5, opnd, -1);

    case INST_LSET_FLAT:
	/*
	 * Lset with 3, 5, or more args. Get the number of index args.
	 */

	opnd = TclGetUInt4AtPtr(pc + 1);
	numIndices = opnd - 2;


	/*
	 * Get the old value of variable, and remove the stack ref. This is
	 * safe because the variable still references the object; the ref
	 * count will never go zero here - we can use the smaller macro
	 * Tcl_DecrRefCount.
	 */
................................................................................
	/*
	 * Compute the new variable value.
	 */

	objResultPtr = TclLsetFlat(interp, valuePtr, numIndices,
		&OBJ_AT_DEPTH(numIndices), OBJ_AT_TOS);
	if (!objResultPtr) {
	    TRACE_WITH_OBJ(("%d => ERROR: ", opnd), Tcl_GetObjResult(interp));
	    goto gotError;
	}

	/*
	 * Set result.
	 */

	TRACE(("%d => %s\n", opnd, O2S(objResultPtr)));
	NEXT_INST_V(5, numIndices+1, -1);

    case INST_LSET_LIST:	/* 'lset' with 4 args */
	/*
	 * Get the old value of variable, and remove the stack ref. This is
	 * safe because the variable still references the object; the ref
	 * count will never go zero here - we can use the smaller macro
................................................................................

	/*
	 * Get the new element value, and the index list.
	 */

	valuePtr = OBJ_AT_TOS;
	value2Ptr = OBJ_UNDER_TOS;



	/*
	 * Compute the new variable value.
	 */

	objResultPtr = TclLsetList(interp, objPtr, value2Ptr, valuePtr);
	if (!objResultPtr) {
	    TRACE_WITH_OBJ(("\"%.30s\" => ERROR: ", O2S(value2Ptr)),
		    Tcl_GetObjResult(interp));
	    goto gotError;
	}

	/*
	 * Set result.
	 */

	TRACE(("=> %s\n", O2S(objResultPtr)));
	NEXT_INST_F(1, 2, -1);

    case INST_LIST_RANGE_IMM:	/* lrange with objc==4 and both indices in
				 * bytecode stream */

	/*
	 * Pop the list and get the indices.
	 */

	valuePtr = OBJ_AT_TOS;
	fromIdx = TclGetInt4AtPtr(pc+1);
	toIdx = TclGetInt4AtPtr(pc+5);



	/*
	 * Get the contents of the list, making sure that it really is a list
	 * in the process.
	 */

	if (TclListObjGetElements(interp, valuePtr, &objc, &objv) != TCL_OK) {
	    TRACE_WITH_OBJ(("\"%.30s\" %d %d => ERROR: ", O2S(valuePtr),
		    fromIdx, toIdx), Tcl_GetObjResult(interp));
	    goto gotError;
	}

	/*
	 * Skip a lot of work if we're about to throw the result away (common
	 * with uses of [lassign]).
	 */
................................................................................
		 * BEWARE! This is looking inside the implementation of the
		 * list type.
		 */

		List *listPtr = valuePtr->internalRep.twoPtrValue.ptr1;

		if (listPtr->refCount == 1) {
		    TRACE(("\"%.30s\" %d %d => ", O2S(valuePtr),
			    TclGetInt4AtPtr(pc+1), TclGetInt4AtPtr(pc+5)));
		    for (index=toIdx+1; index<objc ; index++) {
			TclDecrRefCount(objv[index]);
		    }
		    listPtr->elemCount = toIdx+1;
		    listPtr->canonicalFlag = 1;
		    TclInvalidateStringRep(valuePtr);
		    TRACE_APPEND(("%.30s\n", O2S(valuePtr)));
................................................................................
		}
	    }
	    objResultPtr = Tcl_NewListObj(toIdx-fromIdx+1, objv+fromIdx);
	} else {
	    TclNewObj(objResultPtr);
	}

	TRACE_WITH_OBJ(("\"%.30s\" %d %d => ", O2S(valuePtr),
		TclGetInt4AtPtr(pc+1), TclGetInt4AtPtr(pc+5)), objResultPtr);
	NEXT_INST_F(9, 1, 1);

    case INST_LIST_IN:
    case INST_LIST_NOT_IN:	/* Basic list containment operators. */
	value2Ptr = OBJ_AT_TOS;
	valuePtr = OBJ_UNDER_TOS;

	s1 = TclGetStringFromObj(valuePtr, &s1len);

	if (TclListObjLength(interp, value2Ptr, &length) != TCL_OK) {
	    TRACE_WITH_OBJ(("\"%.30s\" \"%.30s\" => ERROR: ", O2S(valuePtr),
		    O2S(value2Ptr)), Tcl_GetObjResult(interp));
	    goto gotError;
	}
	match = 0;
	if (length > 0) {
	    int i = 0;
	    Tcl_Obj *o;

................................................................................
	    } while (i < length && match == 0);
	}

	if (*pc == INST_LIST_NOT_IN) {
	    match = !match;
	}

	TRACE(("%.20s %.20s => %d\n", O2S(valuePtr), O2S(value2Ptr), match));

	/*
	 * Peep-hole optimisation: if you're about to jump, do jump from here.
	 * We're saving the effort of pushing a boolean value only to pop it
	 * for branching.
	 */

................................................................................
	value2Ptr = OBJ_AT_TOS;
	valuePtr = OBJ_UNDER_TOS;
	TRACE(("\"%.30s\" \"%.30s\" => ", O2S(valuePtr), O2S(value2Ptr)));
	if (Tcl_IsShared(valuePtr)) {
	    objResultPtr = Tcl_DuplicateObj(valuePtr);
	    if (Tcl_ListObjAppendList(interp, objResultPtr,
		    value2Ptr) != TCL_OK) {
		TRACE_APPEND(("ERROR: %.30s\n", O2S(Tcl_GetObjResult(interp))));
		TclDecrRefCount(objResultPtr);
		goto gotError;
	    }
	    TRACE_APPEND(("\"%.30s\"\n", O2S(objResultPtr)));
	    NEXT_INST_F(1, 2, 1);
	} else {
	    if (Tcl_ListObjAppendList(interp, valuePtr, value2Ptr) != TCL_OK){
		TRACE_APPEND(("ERROR: %.30s\n", O2S(Tcl_GetObjResult(interp))));
		goto gotError;
	    }
	    TRACE_APPEND(("\"%.30s\"\n", O2S(valuePtr)));
	    NEXT_INST_F(1, 1, 0);
	}

    /*
................................................................................
	TclNewIntObj(objResultPtr, length);
	TRACE(("%.20s => %d\n", O2S(valuePtr), length));
	NEXT_INST_F(1, 1, 1);

    case INST_STR_INDEX:
	value2Ptr = OBJ_AT_TOS;
	valuePtr = OBJ_UNDER_TOS;


	/*
	 * Get char length to calulate what 'end' means.
	 */

	length = Tcl_GetCharLength(valuePtr);
	if (TclGetIntForIndexM(interp, value2Ptr, length-1, &index)!=TCL_OK) {

	    goto gotError;
	}

	if ((index < 0) || (index >= length)) {
	    TclNewObj(objResultPtr);
	} else if (TclIsPureByteArray(valuePtr)) {
	    objResultPtr = Tcl_NewByteArrayObj(
................................................................................
	     * practical use.
	     */

	    length = Tcl_UniCharToUtf(ch, buf);
	    objResultPtr = Tcl_NewStringObj(buf, length);
	}

	TRACE(("%.20s %.20s => %s\n", O2S(valuePtr), O2S(value2Ptr),
		O2S(objResultPtr)));
	NEXT_INST_F(1, 2, 1);

    case INST_STR_RANGE:
	TRACE(("\"%.20s\" %s %s =>",
		O2S(OBJ_AT_DEPTH(2)), O2S(OBJ_UNDER_TOS), O2S(OBJ_AT_TOS)));
	length = Tcl_GetCharLength(OBJ_AT_DEPTH(2)) - 1;
	if (TclGetIntForIndexM(interp, OBJ_UNDER_TOS, length,
		    &fromIdx) != TCL_OK
	    || TclGetIntForIndexM(interp, OBJ_AT_TOS, length,
		    &toIdx) != TCL_OK) {

	    goto gotError;
	}

	if (fromIdx < 0) {
	    fromIdx = 0;
	}
	if (toIdx >= length) {
................................................................................
	TRACE(("%s %s => ", O2S(valuePtr), O2S(value2Ptr)));
	objResultPtr = ExecuteExtendedBinaryMathOp(interp, *pc, &TCONST(0),
		valuePtr, value2Ptr);
	if (objResultPtr == DIVIDED_BY_ZERO) {
	    TRACE_APPEND(("DIVIDE BY ZERO\n"));
	    goto divideByZero;
	} else if (objResultPtr == GENERAL_ARITHMETIC_ERROR) {
	    TRACE_APPEND(("ERROR: %s\n",
		    TclGetString(Tcl_GetObjResult(interp))));
	    goto gotError;
	} else if (objResultPtr == NULL) {
	    TRACE_APPEND(("%s\n", O2S(valuePtr)));
	    NEXT_INST_F(1, 1, 0);
	} else {
	    TRACE_APPEND(("%s\n", O2S(objResultPtr)));
	    NEXT_INST_F(1, 2, 1);
................................................................................
	if (objResultPtr == DIVIDED_BY_ZERO) {
	    TRACE_APPEND(("DIVIDE BY ZERO\n"));
	    goto divideByZero;
	} else if (objResultPtr == EXPONENT_OF_ZERO) {
	    TRACE_APPEND(("EXPONENT OF ZERO\n"));
	    goto exponOfZero;
	} else if (objResultPtr == GENERAL_ARITHMETIC_ERROR) {
	    TRACE_APPEND(("ERROR: %s\n",
		    TclGetString(Tcl_GetObjResult(interp))));
	    goto gotError;
	} else if (objResultPtr == NULL) {
	    TRACE_APPEND(("%s\n", O2S(valuePtr)));
	    NEXT_INST_F(1, 1, 0);
	} else {
	    TRACE_APPEND(("%s\n", O2S(objResultPtr)));
	    NEXT_INST_F(1, 2, 1);
................................................................................
    case INST_FOREACH_STEP4: /* DEPRECATED */
	/*
	 * "Step" a foreach loop (i.e., begin its next iteration) by assigning
	 * the next value list element to each loop var.
	 */

	opnd = TclGetUInt4AtPtr(pc+1);

	infoPtr = codePtr->auxDataArrayPtr[opnd].clientData;
	numLists = infoPtr->numLists;

	/*
	 * Increment the temp holding the loop iteration number.
	 */

................................................................................
	for (i = 0;  i < numLists;  i++) {
	    varListPtr = infoPtr->varLists[i];
	    numVars = varListPtr->numVars;

	    listVarPtr = LOCAL(listTmpIndex);
	    listPtr = listVarPtr->value.objPtr;
	    if (TclListObjLength(interp, listPtr, &listLen) != TCL_OK) {
		TRACE_WITH_OBJ(("%u => ERROR converting list %ld, \"%s\": ",
			opnd, i, O2S(listPtr)), Tcl_GetObjResult(interp));
		goto gotError;
	    }
	    if (listLen > iterNum * numVars) {
		continueLoop = 1;
	    }
	    listTmpIndex++;
	}
................................................................................
			    Tcl_IncrRefCount(valuePtr);
			}
		    } else {
			DECACHE_STACK_INFO();
			if (TclPtrSetVar(interp, varPtr, NULL, NULL, NULL,
				valuePtr, TCL_LEAVE_ERR_MSG, varIndex)==NULL){
			    CACHE_STACK_INFO();
			    TRACE_WITH_OBJ((
				    "%u => ERROR init. index temp %d: ",
				    opnd,varIndex), Tcl_GetObjResult(interp));
			    TclDecrRefCount(listPtr);
			    goto gotError;
			}
			CACHE_STACK_INFO();
		    }
		    valIndex++;
		}
		TclDecrRefCount(listPtr);
		listTmpIndex++;
	    }
	}
	TRACE(("%u => %d lists, iter %d, %s loop\n", opnd, numLists,
		iterNum, (continueLoop? "continue" : "exit")));

	/*
	 * Run-time peep-hole optimisation: the compiler ALWAYS follows
	 * INST_FOREACH_STEP4 with an INST_JUMP_FALSE. We just skip that
	 * instruction and jump direct from here.
	 */
................................................................................
		}
		listTmpDepth--;
	    }
	    /* loopCtTemp being 'misused' for storing the jump size */
	    NEXT_INST_F(infoPtr->loopCtTemp, 0, 0);
	}




	/*
	 * FALL THROUGH
	 */
	pc++;


    case INST_FOREACH_END:
	/* THIS INSTRUCTION IS ONLY CALLED AS A BREAK TARGET */
	tmpPtr = OBJ_AT_TOS;
	infoPtr = tmpPtr->internalRep.otherValuePtr;
	numLists = infoPtr->numLists;
	NEXT_INST_V(1, numLists+2, 0);
................................................................................
	}
	TRACE_APPEND(("OK\n"));
	NEXT_INST_F(1, 1, 0);

    case INST_DICT_GET:
    case INST_DICT_EXISTS: {
	register Tcl_Interp *interp2 = interp;


	opnd = TclGetUInt4AtPtr(pc+1);
	TRACE(("%u => ", opnd));
	dictPtr = OBJ_AT_DEPTH(opnd);
	if (*pc == INST_DICT_EXISTS) {
	    interp2 = NULL;
	}
	if (opnd > 1) {
	    dictPtr = TclTraceDictPath(interp2, dictPtr, opnd-1,
		    &OBJ_AT_DEPTH(opnd-1), DICT_PATH_READ);
	    if (dictPtr == NULL) {
		if (*pc == INST_DICT_EXISTS) {

		    goto dictNotExists;
		}
		TRACE_WITH_OBJ((
			"ERROR tracing dictionary path into \"%s\": ",
			O2S(OBJ_AT_DEPTH(opnd))),
			Tcl_GetObjResult(interp));
		goto gotError;
	    }
	}
	if (Tcl_DictObjGet(interp2, dictPtr, OBJ_AT_TOS,
		&objResultPtr) == TCL_OK) {
	    if (*pc == INST_DICT_EXISTS) {
		objResultPtr = TCONST(objResultPtr ? 1 : 0);
		TRACE_APPEND(("%.30s\n", O2S(objResultPtr)));
		NEXT_INST_V(5, opnd+1, 1);
	    }
	    if (objResultPtr) {
		TRACE_APPEND(("%.30s\n", O2S(objResultPtr)));
		NEXT_INST_V(5, opnd+1, 1);
	    }
	    DECACHE_STACK_INFO();
	    Tcl_SetObjResult(interp, Tcl_ObjPrintf(
		    "key \"%s\" not known in dictionary",
		    TclGetString(OBJ_AT_TOS)));
	    Tcl_SetErrorCode(interp, "TCL", "LOOKUP", "DICT",
		    TclGetString(OBJ_AT_TOS), NULL);
	    CACHE_STACK_INFO();
	    TRACE_WITH_OBJ(("%u => ERROR ", opnd), Tcl_GetObjResult(interp));
	} else {
	    if (*pc == INST_DICT_EXISTS) {
	    dictNotExists:
		objResultPtr = TCONST(0);



		TRACE_APPEND(("%.30s\n", O2S(objResultPtr)));
		NEXT_INST_V(5, opnd+1, 1);
	    }
	    TRACE_WITH_OBJ((

		    "%u => ERROR reading leaf dictionary key \"%s\": ",
		    opnd, O2S(dictPtr)), Tcl_GetObjResult(interp));



	}




	goto gotError;






















    }

    case INST_DICT_SET:
    case INST_DICT_UNSET:
    case INST_DICT_INCR_IMM:
	opnd = TclGetUInt4AtPtr(pc+1);
	opnd2 = TclGetUInt4AtPtr(pc+5);
................................................................................
	    Tcl_IncrRefCount(dictPtr);
	    DECACHE_STACK_INFO();
	    objResultPtr = TclPtrSetVar(interp, varPtr, NULL, NULL, NULL,
		    dictPtr, TCL_LEAVE_ERR_MSG, opnd2);
	    CACHE_STACK_INFO();
	    TclDecrRefCount(dictPtr);
	    if (objResultPtr == NULL) {
		TRACE_APPEND(("ERROR: %.30s\n",
			O2S(Tcl_GetObjResult(interp))));
		goto gotError;
	    }
	}
#ifndef TCL_COMPILE_DEBUG
	if (*(pc+9) == INST_POP) {
	    NEXT_INST_V(10, cleanup, 0);
	}
#endif
	TRACE_APPEND(("%.30s\n", O2S(objResultPtr)));
	NEXT_INST_V(9, cleanup, 1);

    case INST_DICT_APPEND:
    case INST_DICT_LAPPEND:
	opnd = TclGetUInt4AtPtr(pc+1);
	varPtr = LOCAL(opnd);
	while (TclIsVarLink(varPtr)) {
................................................................................
	}

	if (Tcl_DictObjGet(interp, dictPtr, OBJ_UNDER_TOS,
		&valuePtr) != TCL_OK) {
	    if (allocateDict) {
		TclDecrRefCount(dictPtr);
	    }

	    goto gotError;
	}

	/*
	 * Note that a non-existent key results in a NULL valuePtr, which is a
	 * case handled separately below. What we *can* say at this point is
	 * that the write-back will always succeed.
................................................................................
		valuePtr = Tcl_DuplicateObj(valuePtr);
		if (Tcl_ListObjAppendElement(interp, valuePtr,
			OBJ_AT_TOS) != TCL_OK) {
		    TclDecrRefCount(valuePtr);
		    if (allocateDict) {
			TclDecrRefCount(dictPtr);
		    }

		    goto gotError;
		}
		Tcl_DictObjPut(NULL, dictPtr, OBJ_UNDER_TOS, valuePtr);
	    } else {
		if (Tcl_ListObjAppendElement(interp, valuePtr,
			OBJ_AT_TOS) != TCL_OK) {
		    if (allocateDict) {
			TclDecrRefCount(dictPtr);
		    }

		    goto gotError;
		}

		/*
		 * Must invalidate the string representation of dictionary
		 * here because we have directly updated the internal
		 * representation; if we don't, callers could see the wrong
................................................................................
	    Tcl_IncrRefCount(dictPtr);
	    DECACHE_STACK_INFO();
	    objResultPtr = TclPtrSetVar(interp, varPtr, NULL, NULL, NULL,
		    dictPtr, TCL_LEAVE_ERR_MSG, opnd);
	    CACHE_STACK_INFO();
	    TclDecrRefCount(dictPtr);
	    if (objResultPtr == NULL) {
		TRACE_APPEND(("ERROR: %.30s\n",
			O2S(Tcl_GetObjResult(interp))));
		goto gotError;
	    }
	}
#ifndef TCL_COMPILE_DEBUG
	if (*(pc+5) == INST_POP) {
	    NEXT_INST_F(6, 2, 0);
	}
................................................................................
	opnd = TclGetUInt4AtPtr(pc+1);
	TRACE(("%u => ", opnd));
	dictPtr = POP_OBJECT();
	searchPtr = ckalloc(sizeof(Tcl_DictSearch));
	if (Tcl_DictObjFirst(interp, dictPtr, searchPtr, &keyPtr,
		&valuePtr, &done) != TCL_OK) {
	    ckfree(searchPtr);

	    goto gotError;
	}
	TclNewObj(statePtr);
	statePtr->typePtr = &dictIteratorType;
	statePtr->internalRep.twoPtrValue.ptr1 = searchPtr;
	statePtr->internalRep.twoPtrValue.ptr2 = dictPtr;
	varPtr = LOCAL(opnd);
................................................................................
	objResultPtr = TCONST(done);
	/* TODO: consider opt like INST_FOREACH_STEP4 */
	NEXT_INST_F(5, 0, 1);

    case INST_DICT_UPDATE_START:
	opnd = TclGetUInt4AtPtr(pc+1);
	opnd2 = TclGetUInt4AtPtr(pc+5);

	varPtr = LOCAL(opnd);
	duiPtr = codePtr->auxDataArrayPtr[opnd2].clientData;
	while (TclIsVarLink(varPtr)) {
	    varPtr = varPtr->value.linkPtr;
	}
	TRACE(("%u => \n", opnd));
	if (TclIsVarDirectReadable(varPtr)) {
	    dictPtr = varPtr->value.objPtr;
	} else {
	    DECACHE_STACK_INFO();
	    dictPtr = TclPtrGetVar(interp, varPtr, NULL, NULL, NULL,
		    TCL_LEAVE_ERR_MSG, opnd);
	    CACHE_STACK_INFO();
	    if (dictPtr == NULL) {

		goto gotError;
	    }
	}
	if (TclListObjGetElements(interp, OBJ_AT_TOS, &length,
		&keyPtrPtr) != TCL_OK) {

	    goto gotError;
	}
	if (length != duiPtr->length) {
	    Tcl_Panic("dictUpdateStart argument length mismatch");
	}
	for (i=0 ; i<length ; i++) {
	    if (Tcl_DictObjGet(interp, dictPtr, keyPtrPtr[i],
		    &valuePtr) != TCL_OK) {

		goto gotError;
	    }
	    varPtr = LOCAL(duiPtr->varIndices[i]);
	    while (TclIsVarLink(varPtr)) {
		varPtr = varPtr->value.linkPtr;
	    }
	    DECACHE_STACK_INFO();
................................................................................
		TclObjUnsetVar2(interp,
			localName(iPtr->varFramePtr, duiPtr->varIndices[i]),
			NULL, 0);
	    } else if (TclPtrSetVar(interp, varPtr, NULL, NULL, NULL,
		    valuePtr, TCL_LEAVE_ERR_MSG,
		    duiPtr->varIndices[i]) == NULL) {
		CACHE_STACK_INFO();

		goto gotError;
	    }
	    CACHE_STACK_INFO();
	}

	NEXT_INST_F(9, 0, 0);

    case INST_DICT_UPDATE_END:
	opnd = TclGetUInt4AtPtr(pc+1);
	opnd2 = TclGetUInt4AtPtr(pc+5);

	varPtr = LOCAL(opnd);
	duiPtr = codePtr->auxDataArrayPtr[opnd2].clientData;
	while (TclIsVarLink(varPtr)) {
	    varPtr = varPtr->value.linkPtr;
	}
	TRACE(("%u => ", opnd));
	if (TclIsVarDirectReadable(varPtr)) {
	    dictPtr = varPtr->value.objPtr;
	} else {
	    DECACHE_STACK_INFO();
	    dictPtr = TclPtrGetVar(interp, varPtr, NULL, NULL, NULL, 0, opnd);
	    CACHE_STACK_INFO();
	}
	if (dictPtr == NULL) {

	    NEXT_INST_F(9, 1, 0);
	}
	if (Tcl_DictObjSize(interp, dictPtr, &length) != TCL_OK
		|| TclListObjGetElements(interp, OBJ_AT_TOS, &length,
			&keyPtrPtr) != TCL_OK) {

	    goto gotError;
	}
	allocdict = Tcl_IsShared(dictPtr);
	if (allocdict) {
	    dictPtr = Tcl_DuplicateObj(dictPtr);
	}
	if (length > 0) {
................................................................................
	    objResultPtr = TclPtrSetVar(interp, varPtr, NULL, NULL, NULL,
		    dictPtr, TCL_LEAVE_ERR_MSG, opnd);
	    CACHE_STACK_INFO();
	    if (objResultPtr == NULL) {
		if (allocdict) {
		    TclDecrRefCount(dictPtr);
		}

		goto gotError;
	    }
	}

	NEXT_INST_F(9, 1, 0);

    case INST_DICT_EXPAND:
	dictPtr = OBJ_UNDER_TOS;
	listPtr = OBJ_AT_TOS;

	if (TclListObjGetElements(interp, listPtr, &objc, &objv) != TCL_OK) {
	    TRACE_WITH_OBJ(("%.30s %.30s => ERROR: ",
		    O2S(dictPtr), O2S(listPtr)), Tcl_GetObjResult(interp));
	    goto gotError;
	}
	objResultPtr = TclDictWithInit(interp, dictPtr, objc, objv);
	if (objResultPtr == NULL) {
	    TRACE_WITH_OBJ(("%.30s %.30s => ERROR: ",
		    O2S(dictPtr), O2S(listPtr)), Tcl_GetObjResult(interp));
	    goto gotError;
	}
	TRACE((" => "));
	TRACE_APPEND(("%.30s\n", O2S(objResultPtr)));
	NEXT_INST_F(1, 2, 1);

    case INST_DICT_RECOMBINE_STK:
	keysPtr = POP_OBJECT();
	varNamePtr = OBJ_UNDER_TOS;
	listPtr = OBJ_AT_TOS;
	TRACE(("\"%.30s\" \"%.30s\" \"%.30s\" => ",
		O2S(varNamePtr), O2S(valuePtr), O2S(keysPtr)));
	if (TclListObjGetElements(interp, listPtr, &objc, &objv) != TCL_OK) {
	    TRACE_APPEND(("ERROR: %.30s\n", O2S(Tcl_GetObjResult(interp))));
	    TclDecrRefCount(keysPtr);
	    goto gotError;
	}
	varPtr = TclObjLookupVarEx(interp, varNamePtr, NULL,
		TCL_LEAVE_ERR_MSG, "set", 1, 1, &arrayPtr);
	if (varPtr == NULL) {
	    TRACE_APPEND(("ERROR: %.30s\n", O2S(Tcl_GetObjResult(interp))));
	    TclDecrRefCount(keysPtr);
	    goto gotError;
	}
	DECACHE_STACK_INFO();
	result = TclDictWithFinish(interp, varPtr,arrayPtr,varNamePtr,NULL,-1,
		objc, objv, keysPtr);
	CACHE_STACK_INFO();
	TclDecrRefCount(keysPtr);
	if (result != TCL_OK) {
	    TRACE_APPEND(("ERROR: %.30s\n", O2S(Tcl_GetObjResult(interp))));
	    goto gotError;
	}
	TRACE_APPEND(("OK\n"));
	NEXT_INST_F(1, 2, 0);

    case INST_DICT_RECOMBINE_IMM:
	opnd = TclGetUInt4AtPtr(pc+1);
	listPtr = OBJ_UNDER_TOS;
	keysPtr = OBJ_AT_TOS;
	varPtr = LOCAL(opnd);
	TRACE(("%u <- \"%.30s\" \"%.30s\" => ", opnd, O2S(valuePtr),
		O2S(keysPtr)));
	if (TclListObjGetElements(interp, listPtr, &objc, &objv) != TCL_OK) {
	    TRACE_APPEND(("ERROR: %.30s\n", O2S(Tcl_GetObjResult(interp))));
	    goto gotError;
	}
	while (TclIsVarLink(varPtr)) {
	    varPtr = varPtr->value.linkPtr;
	}
	DECACHE_STACK_INFO();
	result = TclDictWithFinish(interp, varPtr, NULL, NULL, NULL, opnd,
		objc, objv, keysPtr);
	CACHE_STACK_INFO();
	if (result != TCL_OK) {
	    TRACE_APPEND(("ERROR: %.30s\n", O2S(Tcl_GetObjResult(interp))));
	    goto gotError;
	}
	TRACE_APPEND(("OK\n"));
	NEXT_INST_F(5, 2, 0);
    }

    /*







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380
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...
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412
....
2744
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2753
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....
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....
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....
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....
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....
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....
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....
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....
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....
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....
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....
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....
3719
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....
3737
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3745








3746
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....
3769
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3777
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....
3801
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....
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....
3877
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....
3893
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....
3924
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3960
3961
....
4009
4010
4011
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4015
4016

4017
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4020
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4023
....
4042
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4047
4048
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4050
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4053
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4055
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4057
4058
4059
4060
4061
4062

4063
4064
4065
4066
4067
4068
4069
....
4083
4084
4085
4086
4087
4088
4089
4090
4091
4092
4093
4094
4095
4096
4097
4098
4099
4100
4101
....
4102
4103
4104
4105
4106
4107
4108
4109
4110
4111
4112
4113
4114
4115
4116
4117
4118
4119
4120
4121
4122
4123
4124
4125
....
4126
4127
4128
4129
4130
4131
4132
4133
4134
4135
4136
4137
4138
4139
4140
4141
4142
4143
4144
4145
4146
4147
4148
4149
4150
4151
....
4155
4156
4157
4158
4159
4160
4161
4162
4163
4164
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4166
4167
4168
4169
4170
4171
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4173
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4176
4177
4178
4179
4180
4181
....
4184
4185
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4206
4207
....
4240
4241
4242
4243
4244
4245
4246
4247
4248
4249
4250
4251
4252
4253


4254
4255
4256
4257
4258
4259
4260

4261
4262

4263
4264
4265
4266
4267
4268
4269

4270
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4272
4273
4274
4275
4276
....
4281
4282
4283
4284
4285
4286
4287
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4289
4290
4291
4292
4293
4294
4295
....
4376
4377
4378
4379
4380
4381
4382
4383
4384

4385
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4387
4388
4389
4390
4391
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4393
4394
4395
4396
4397
4398
4399
4400
4401
4402
4403
4404
4405
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4407
4408
....
4490
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4492
4493
4494
4495
4496
4497
4498
4499

4500
4501
4502
4503
4504
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4508
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4510
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4512
4513
4514
4515
4516
....
4520
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4527

4528
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4533
4534

4535
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4540
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4547
4548
4549
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4553
4554
4555

4556
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4558
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4560
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4562
....
4571
4572
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4574
4575
4576
4577

4578
4579
4580
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....
4586
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4610
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4622
....
4627
4628
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4630
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4641
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....
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4702
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....
4751
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4755
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4757


4758
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4760
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....
4766
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4774
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....
4808
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....
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4851
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4853
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4855
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4858
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....
5002
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5010
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5020
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5024
....
5036
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5041
5042

5043
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....
5650
5651
5652
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5657

5658
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5660
5661
5662
5663
5664
....
5822
5823
5824
5825
5826
5827
5828
5829

5830
5831
5832
5833
5834
5835
5836
....
6077
6078
6079
6080
6081
6082
6083
6084
6085
6086
6087
6088
6089
6090
6091
....
6104
6105
6106
6107
6108
6109
6110
6111
6112
6113
6114
6115
6116
6117
6118
6119
....
6160
6161
6162
6163
6164
6165
6166
6167
6168
6169
6170
6171
6172
6173
6174
6175
6176
6177
6178
6179
6180
6181
6182
6183
6184
6185
6186
6187
6188
....
6343
6344
6345
6346
6347
6348
6349
6350
6351
6352
6353
6354
6355
6356
6357
6358
6359
6360
6361
6362
6363
6364
....
6467
6468
6469
6470
6471
6472
6473
6474
6475
6476
6477
6478
6479
6480
6481
6482
6483
6484
6485
6486
6487
6488
6489
6490
6491
6492
6493
6494
6495
6496
6497
6498
6499
6500
6501

6502
6503



6504
6505
6506
6507
6508
6509
6510





6511
6512
6513
6514
6515


6516
6517
6518
6519
6520
6521
6522
6523
6524
6525
6526
6527
6528
6529
6530
6531
6532
6533
6534
6535
6536
6537
6538
6539
6540
6541
6542
6543
6544
6545
6546
6547
6548
6549
6550
6551
6552
6553
6554
6555
6556
....
6639
6640
6641
6642
6643
6644
6645
6646

6647
6648
6649
6650
6651
6652
6653
6654
6655
6656
6657
6658
6659
6660
6661
6662
....
6681
6682
6683
6684
6685
6686
6687
6688
6689
6690
6691
6692
6693
6694
6695
....
6730
6731
6732
6733
6734
6735
6736
6737
6738
6739
6740
6741
6742
6743
6744
6745
6746
6747
6748
6749
6750
6751
6752
6753
6754
....
6777
6778
6779
6780
6781
6782
6783
6784

6785
6786
6787
6788
6789
6790
6791
....
6797
6798
6799
6800
6801
6802
6803
6804
6805
6806
6807
6808
6809
6810
6811
....
6867
6868
6869
6870
6871
6872
6873
6874
6875
6876
6877
6878
6879

6880
6881
6882
6883
6884
6885
6886
6887
6888
6889
6890
6891
6892
6893
6894
6895
6896
6897
6898
6899
6900
6901
6902
6903
6904
6905
6906
6907
6908
6909
6910
....
6912
6913
6914
6915
6916
6917
6918
6919
6920
6921
6922
6923
6924
6925
6926
6927
6928
6929
6930
6931
6932
6933
6934
6935

6936
6937
6938
6939
6940
6941
6942
6943
6944
6945
6946
6947
6948
6949
6950
6951
6952
6953
6954
6955
6956
6957
....
6989
6990
6991
6992
6993
6994
6995
6996
6997
6998
6999
7000
7001
7002
7003
7004
7005
7006
7007

7008
7009
7010
7011
7012
7013

7014
7015

7016
7017
7018
7019
7020
7021
7022
7023
7024
7025
7026
7027
7028
7029
7030
7031
7032
7033
7034
7035
7036
7037
7038
7039
7040
7041
7042
7043
7044
7045
7046
7047
7048
7049
7050
7051
7052
7053
7054
7055
7056
7057
7058
7059
7060
7061
7062
7063
7064
7065
7066
7067
7068
7069
7070
7071
7072
7073
7074
7075
	break;							\
    }
#   define TRACE_APPEND(a) \
    while (traceInstructions) {		\
	printf a;			\
	break;				\
    }
#   define TRACE_ERROR(interp) \
    TRACE_APPEND(("ERROR: %.30s\n", O2S(Tcl_GetObjResult(interp))));
#   define TRACE_WITH_OBJ(a, objPtr) \
    while (traceInstructions) {					\
	fprintf(stdout, "%2d: %2d (%u) %s ", iPtr->numLevels,	\
		(int) CURR_DEPTH,				\
		(unsigned) (pc - codePtr->codeStart),		\
		GetOpcodeName(pc));				\
	printf a;						\
................................................................................
	break;							\
    }
#   define O2S(objPtr) \
    (objPtr ? TclGetString(objPtr) : "")
#else /* !TCL_COMPILE_DEBUG */
#   define TRACE(a)
#   define TRACE_APPEND(a)
#   define TRACE_ERROR(interp)
#   define TRACE_WITH_OBJ(a, objPtr)
#   define O2S(objPtr)
#endif /* TCL_COMPILE_DEBUG */

/*
 * DTrace instruction probe macros.
 */
................................................................................
	/*
	 * Make sure that the element at stackTop is a list; if not, just
	 * leave with an error. Note that the element from the expand list
	 * will be removed at checkForCatch.
	 */

	objPtr = OBJ_AT_TOS;
	TRACE(("\"%.30s\" => ", O2S(objPtr)));
	if (TclListObjGetElements(interp, objPtr, &objc, &objv) != TCL_OK) {

	    TRACE_ERROR(interp);
	    goto gotError;
	}
	(void) POP_OBJECT();

	/*
	 * Make sure there is enough room in the stack to expand this list
	 * *and* process the rest of the command (at least up to the next
................................................................................
	 * that it has a freeIntRepProc we use Tcl_DecrRefCount().
	 */

	for (i = 0; i < objc; i++) {
	    PUSH_OBJECT(objv[i]);
	}

	TRACE_APPEND(("OK\n"));
	Tcl_DecrRefCount(objPtr);
	NEXT_INST_F(5, 0, 0);
    }

    case INST_EXPR_STK: {
	ByteCode *newCodePtr;

................................................................................
		TRACE_APPEND(("%.30s\n", O2S(objResultPtr)));
		NEXT_INST_F(pcAdjustment, 1, 1);
	    }
	}
	varPtr = TclLookupArrayElement(interp, part1Ptr, part2Ptr,
		TCL_LEAVE_ERR_MSG, "read", 0, 1, arrayPtr, opnd);
	if (varPtr == NULL) {
	    TRACE_ERROR(interp);
	    goto gotError;
	}
	cleanup = 1;
	goto doCallPtrGetVar;

    case INST_LOAD_ARRAY_STK:
	cleanup = 2;
................................................................................

    doLoadStk:
	part1Ptr = objPtr;
	varPtr = TclObjLookupVarEx(interp, part1Ptr, part2Ptr,
		TCL_LEAVE_ERR_MSG, "read", /*createPart1*/0, /*createPart2*/1,
		&arrayPtr);
	if (!varPtr) {
	    TRACE_ERROR(interp);
	    goto gotError;
	}

	if (TclIsVarDirectReadable2(varPtr, arrayPtr)) {
	    /*
	     * No errors, no traces: just get the value.
	     */
................................................................................
	 */

	DECACHE_STACK_INFO();
	objResultPtr = TclPtrGetVar(interp, varPtr, arrayPtr,
		part1Ptr, part2Ptr, TCL_LEAVE_ERR_MSG, opnd);
	CACHE_STACK_INFO();
	if (!objResultPtr) {
	    TRACE_ERROR(interp);
	    goto gotError;
	}
	TRACE_APPEND(("%.30s\n", O2S(objResultPtr)));
	NEXT_INST_V(pcAdjustment, cleanup, 1);

    /*
     *	   End of INST_LOAD instructions.
................................................................................
	    TRACE(("\"%.30s(%.30s)\" <- \"%.30s\" => ",
		    O2S(part1Ptr), O2S(part2Ptr), O2S(valuePtr)));
	}
#endif
	varPtr = TclObjLookupVarEx(interp, objPtr,part2Ptr, TCL_LEAVE_ERR_MSG,
		"set", /*createPart1*/ 1, /*createPart2*/ 1, &arrayPtr);
	if (!varPtr) {
	    TRACE_ERROR(interp);
	    goto gotError;
	}
	cleanup = ((part2Ptr == NULL)? 2 : 3);
	pcAdjustment = 1;
	opnd = -1;
	goto doCallPtrSetVar;

................................................................................
	cleanup = 2;
	part1Ptr = NULL;

    doStoreArrayDirectFailed:
	varPtr = TclLookupArrayElement(interp, part1Ptr, part2Ptr,
		TCL_LEAVE_ERR_MSG, "set", 1, 1, arrayPtr, opnd);
	if (!varPtr) {
	    TRACE_ERROR(interp);
	    goto gotError;
	}
	goto doCallPtrSetVar;

    case INST_LAPPEND_SCALAR4:
	opnd = TclGetUInt4AtPtr(pc+1);
	pcAdjustment = 5;
................................................................................

    doCallPtrSetVar:
	DECACHE_STACK_INFO();
	objResultPtr = TclPtrSetVar(interp, varPtr, arrayPtr,
		part1Ptr, part2Ptr, valuePtr, storeFlags, opnd);
	CACHE_STACK_INFO();
	if (!objResultPtr) {
	    TRACE_ERROR(interp);
	    goto gotError;
	}
#ifndef TCL_COMPILE_DEBUG
	if (*(pc+pcAdjustment) == INST_POP) {
	    NEXT_INST_V((pcAdjustment+1), cleanup, 0);
	}
#endif
................................................................................
	part1Ptr = objPtr;
	opnd = -1;
	varPtr = TclObjLookupVarEx(interp, objPtr, part2Ptr,
		TCL_LEAVE_ERR_MSG, "read", 1, 1, &arrayPtr);
	if (!varPtr) {
	    Tcl_AddErrorInfo(interp,
		    "\n    (reading value of variable to increment)");
	    TRACE_ERROR(interp);
	    Tcl_DecrRefCount(incrPtr);
	    goto gotError;
	}
	cleanup = ((part2Ptr == NULL)? 1 : 2);
	goto doIncrVar;

    case INST_INCR_ARRAY1_IMM:
................................................................................
	while (TclIsVarLink(arrayPtr)) {
	    arrayPtr = arrayPtr->value.linkPtr;
	}
	TRACE(("%u \"%.30s\" (by %ld) => ", opnd, O2S(part2Ptr), increment));
	varPtr = TclLookupArrayElement(interp, part1Ptr, part2Ptr,
		TCL_LEAVE_ERR_MSG, "read", 1, 1, arrayPtr, opnd);
	if (!varPtr) {
	    TRACE_ERROR(interp);
	    Tcl_DecrRefCount(incrPtr);
	    goto gotError;
	}
	goto doIncrVar;

    case INST_INCR_SCALAR1_IMM:
	opnd = TclGetUInt1AtPtr(pc+1);
................................................................................
		varPtr->value.objPtr = objResultPtr;
	    } else {
		objResultPtr = objPtr;
	    }
	    TclNewLongObj(incrPtr, increment);
	    if (TclIncrObj(interp, objResultPtr, incrPtr) != TCL_OK) {
		Tcl_DecrRefCount(incrPtr);
		TRACE_ERROR(interp);

		goto gotError;
	    }
	    Tcl_DecrRefCount(incrPtr);
	    goto doneIncr;
	}

	/*
................................................................................
		Tcl_IncrRefCount(objResultPtr);
		varPtr->value.objPtr = objResultPtr;
	    } else {
		objResultPtr = objPtr;
	    }
	    if (TclIncrObj(interp, objResultPtr, incrPtr) != TCL_OK) {
		Tcl_DecrRefCount(incrPtr);
		TRACE_ERROR(interp);

		goto gotError;
	    }
	    Tcl_DecrRefCount(incrPtr);
	} else {
	    DECACHE_STACK_INFO();
	    objResultPtr = TclPtrIncrObjVar(interp, varPtr, arrayPtr,
		    part1Ptr, part2Ptr, incrPtr, TCL_LEAVE_ERR_MSG, opnd);
	    CACHE_STACK_INFO();
	    Tcl_DecrRefCount(incrPtr);
	    if (objResultPtr == NULL) {
		TRACE_ERROR(interp);

		goto gotError;
	    }
	}
    doneIncr:
	TRACE_APPEND(("%.30s\n", O2S(objResultPtr)));
#ifndef TCL_COMPILE_DEBUG
	if (*(pc+pcAdjustment) == INST_POP) {
................................................................................
    /*
     *	   End of INST_INCR instructions.
     * -----------------------------------------------------------------
     *	   Start of INST_EXIST instructions.
     */

    case INST_EXIST_SCALAR:
	cleanup = 0;
	pcAdjustment = 5;
	opnd = TclGetUInt4AtPtr(pc+1);
	varPtr = LOCAL(opnd);
	while (TclIsVarLink(varPtr)) {
	    varPtr = varPtr->value.linkPtr;
	}
	TRACE(("%u => ", opnd));
	if (ReadTraced(varPtr)) {
................................................................................
		    TCL_TRACE_READS, 0, opnd);
	    CACHE_STACK_INFO();
	    if (TclIsVarUndefined(varPtr)) {
		TclCleanupVar(varPtr, NULL);
		varPtr = NULL;
	    }
	}
	goto afterExistsPeephole;









    case INST_EXIST_ARRAY:
	cleanup = 1;
	pcAdjustment = 5;
	opnd = TclGetUInt4AtPtr(pc+1);
	part2Ptr = OBJ_AT_TOS;
	arrayPtr = LOCAL(opnd);
	while (TclIsVarLink(arrayPtr)) {
	    arrayPtr = arrayPtr->value.linkPtr;
	}
	TRACE(("%u \"%.30s\" => ", opnd, O2S(part2Ptr)));
	if (TclIsVarArray(arrayPtr) && !ReadTraced(arrayPtr)) {
	    varPtr = VarHashFindVar(arrayPtr->value.tablePtr, part2Ptr);
	    if (!varPtr || !ReadTraced(varPtr)) {
		goto afterExistsPeephole;
	    }
	}
	varPtr = TclLookupArrayElement(interp, NULL, part2Ptr, 0, "access",
		0, 1, arrayPtr, opnd);
	if (varPtr) {
	    if (ReadTraced(varPtr) || (arrayPtr && ReadTraced(arrayPtr))) {
		DECACHE_STACK_INFO();
................................................................................
		CACHE_STACK_INFO();
	    }
	    if (TclIsVarUndefined(varPtr)) {
		TclCleanupVar(varPtr, arrayPtr);
		varPtr = NULL;
	    }
	}
	goto afterExistsPeephole;




    case INST_EXIST_ARRAY_STK:
	cleanup = 2;
	pcAdjustment = 1;
	part2Ptr = OBJ_AT_TOS;		/* element name */
	part1Ptr = OBJ_UNDER_TOS;	/* array name */
	TRACE(("\"%.30s(%.30s)\" => ", O2S(part1Ptr), O2S(part2Ptr)));
	goto doExistStk;

    case INST_EXIST_STK:
	cleanup = 1;
	pcAdjustment = 1;
	part2Ptr = NULL;
	part1Ptr = OBJ_AT_TOS;		/* variable name */
	TRACE(("\"%.30s\" => ", O2S(part1Ptr)));

    doExistStk:
	varPtr = TclObjLookupVarEx(interp, part1Ptr, part2Ptr, 0, "access",
		/*createPart1*/0, /*createPart2*/1, &arrayPtr);
................................................................................
		CACHE_STACK_INFO();
	    }
	    if (TclIsVarUndefined(varPtr)) {
		TclCleanupVar(varPtr, arrayPtr);
		varPtr = NULL;
	    }
	}

	/*
	 * Peep-hole optimisation: if you're about to jump, do jump from here.
	 */

    afterExistsPeephole: {
	int found = (varPtr && !TclIsVarUndefined(varPtr));

	pc += pcAdjustment;
#ifndef TCL_COMPILE_DEBUG
	switch (*pc) {
	case INST_JUMP_FALSE1:
	    NEXT_INST_V((found? 2 : TclGetInt1AtPtr(pc+1)), cleanup, 0);
	case INST_JUMP_TRUE1:
	    NEXT_INST_V((found? TclGetInt1AtPtr(pc+1) : 2), cleanup, 0);
	case INST_JUMP_FALSE4:
	    NEXT_INST_V((found? 5 : TclGetInt4AtPtr(pc+1)), cleanup, 0);
	case INST_JUMP_TRUE4:
	    NEXT_INST_V((found? TclGetInt4AtPtr(pc+1) : 5), cleanup, 0);
	}
#endif
	objResultPtr = TCONST(found ? 1 : 0);
	TRACE_APPEND(("%.30s\n", O2S(objResultPtr)));
	NEXT_INST_V(0, cleanup, 1);
    }

    /*
     *	   End of INST_EXIST instructions.
     * -----------------------------------------------------------------
     *	   Start of INST_UNSET instructions.
     */

................................................................................
    case INST_UNSET_SCALAR:
	flags = TclGetUInt1AtPtr(pc+1) ? TCL_LEAVE_ERR_MSG : 0;
	opnd = TclGetUInt4AtPtr(pc+2);
	varPtr = LOCAL(opnd);
	while (TclIsVarLink(varPtr)) {
	    varPtr = varPtr->value.linkPtr;
	}
	TRACE(("%s %u => ", (flags?"normal":"noerr"), opnd));
	if (TclIsVarDirectUnsettable(varPtr) && !TclIsVarInHash(varPtr)) {
	    /*
	     * No errors, no traces, no searches: just make the variable cease
	     * to exist.
	     */

	    if (!TclIsVarUndefined(varPtr)) {
		TclDecrRefCount(varPtr->value.objPtr);
	    } else if (flags & TCL_LEAVE_ERR_MSG) {
		goto slowUnsetScalar;
	    }
	    varPtr->value.objPtr = NULL;
	    TRACE_APPEND(("OK\n"));
	    NEXT_INST_F(6, 0, 0);
	}

    slowUnsetScalar:
	DECACHE_STACK_INFO();
	if (TclPtrUnsetVar(interp, varPtr, NULL, NULL, NULL, flags,
		opnd) != TCL_OK && flags) {
................................................................................
	flags = TclGetUInt1AtPtr(pc+1) ? TCL_LEAVE_ERR_MSG : 0;
	opnd = TclGetUInt4AtPtr(pc+2);
	part2Ptr = OBJ_AT_TOS;
	arrayPtr = LOCAL(opnd);
	while (TclIsVarLink(arrayPtr)) {
	    arrayPtr = arrayPtr->value.linkPtr;
	}
	TRACE(("%s %u \"%.30s\" => ",
		(flags ? "normal" : "noerr"), opnd, O2S(part2Ptr)));
	if (TclIsVarArray(arrayPtr) && !UnsetTraced(arrayPtr)) {
	    varPtr = VarHashFindVar(arrayPtr->value.tablePtr, part2Ptr);
	    if (varPtr && TclIsVarDirectUnsettable(varPtr)) {
		/*
		 * No nasty traces and element exists, so we can proceed to
		 * unset it. Might still not exist though...
................................................................................

		if (!TclIsVarUndefined(varPtr)) {
		    TclDecrRefCount(varPtr->value.objPtr);
		} else if (flags & TCL_LEAVE_ERR_MSG) {
		    goto slowUnsetArray;
		}
		varPtr->value.objPtr = NULL;
		TRACE_APPEND(("OK\n"));
		NEXT_INST_F(6, 1, 0);
	    } else if (!varPtr && !(flags & TCL_LEAVE_ERR_MSG)) {
		/*
		 * Don't need to do anything here.
		 */

		TRACE_APPEND(("OK\n"));
		NEXT_INST_F(6, 1, 0);
	    }
	}
    slowUnsetArray:
	DECACHE_STACK_INFO();
	varPtr = TclLookupArrayElement(interp, NULL, part2Ptr, flags, "unset",
		0, 0, arrayPtr, opnd);
................................................................................
	NEXT_INST_F(6, 1, 0);

    case INST_UNSET_ARRAY_STK:
	flags = TclGetUInt1AtPtr(pc+1) ? TCL_LEAVE_ERR_MSG : 0;
	cleanup = 2;
	part2Ptr = OBJ_AT_TOS;		/* element name */
	part1Ptr = OBJ_UNDER_TOS;	/* array name */
	TRACE(("%s \"%.30s(%.30s)\" => ", (flags?"normal":"noerr"),
		O2S(part1Ptr), O2S(part2Ptr)));
	goto doUnsetStk;

    case INST_UNSET_STK:
	flags = TclGetUInt1AtPtr(pc+1) ? TCL_LEAVE_ERR_MSG : 0;
	cleanup = 1;
	part2Ptr = NULL;
	part1Ptr = OBJ_AT_TOS;		/* variable name */
	TRACE(("%s \"%.30s\" => ", (flags?"normal":"noerr"), O2S(part1Ptr)));

    doUnsetStk:
	DECACHE_STACK_INFO();
	if (TclObjUnsetVar2(interp, part1Ptr, part2Ptr, flags) != TCL_OK
		&& (flags & TCL_LEAVE_ERR_MSG)) {
	    goto errorInUnset;
	}
	CACHE_STACK_INFO();
	TRACE_APPEND(("OK\n"));
	NEXT_INST_V(2, cleanup, 0);

    errorInUnset:
	CACHE_STACK_INFO();
	TRACE_ERROR(interp);
	goto gotError;

	/*
	 * This is really an unset operation these days. Do not issue.
	 */

    case INST_DICT_DONE:
................................................................................
		&& (TclIsVarArray(varPtr) || TclIsVarUndefined(varPtr))) {
	    DECACHE_STACK_INFO();
	    result = TclObjCallVarTraces(iPtr, arrayPtr, varPtr, part1Ptr,
		    NULL, (TCL_LEAVE_ERR_MSG|TCL_NAMESPACE_ONLY|
		    TCL_GLOBAL_ONLY|TCL_TRACE_ARRAY), 1, opnd);
	    CACHE_STACK_INFO();
	    if (result == TCL_ERROR) {
		TRACE_ERROR(interp);

		goto gotError;
	    }
	}
	if (varPtr && TclIsVarArray(varPtr) && !TclIsVarUndefined(varPtr)) {
	    objResultPtr = TCONST(1);
	} else {
	    objResultPtr = TCONST(0);
................................................................................
	pcAdjustment = 1;
	cleanup = 1;
	part1Ptr = OBJ_AT_TOS;
	TRACE(("\"%.30s\" => ", O2S(part1Ptr)));
	varPtr = TclObjLookupVarEx(interp, part1Ptr, NULL, TCL_LEAVE_ERR_MSG,
		"set", /*createPart1*/1, /*createPart2*/0, &arrayPtr);
	if (varPtr == NULL) {
	    TRACE_ERROR(interp);
	    goto gotError;
	}
    doArrayMake:
	if (varPtr && !TclIsVarArray(varPtr)) {
	    if (TclIsVarArrayElement(varPtr) || !TclIsVarUndefined(varPtr)) {
		/*
		 * Either an array element, or a scalar: lose!
		 */

		TclObjVarErrMsg(interp, part1Ptr, NULL, "array set",
			"variable isn't array", opnd);
		Tcl_SetErrorCode(interp, "TCL", "WRITE", "ARRAY", NULL);
		TRACE_ERROR(interp);

		goto gotError;
	    }
	    TclSetVarArray(varPtr);
	    varPtr->value.tablePtr = ckalloc(sizeof(TclVarHashTable));
	    TclInitVarHashTable(varPtr->value.tablePtr,
		    TclGetVarNsPtr(varPtr));
#ifdef TCL_COMPILE_DEBUG
................................................................................
    {
	Var *otherPtr;
	CallFrame *framePtr, *savedFramePtr;
	Tcl_Namespace *nsPtr;
	Namespace *savedNsPtr;

    case INST_UPVAR:
	TRACE(("%d %.30s %.30s => ", TclGetInt4AtPtr(pc+1),
		O2S(OBJ_UNDER_TOS), O2S(OBJ_AT_TOS)));

	if (TclObjGetFrame(interp, OBJ_UNDER_TOS, &framePtr) == -1) {
	    TRACE_ERROR(interp);
	    goto gotError;
	}

	/*
	 * Locate the other variable.
	 */

................................................................................
	savedFramePtr = iPtr->varFramePtr;
	iPtr->varFramePtr = framePtr;
	otherPtr = TclObjLookupVarEx(interp, OBJ_AT_TOS, NULL,
		TCL_LEAVE_ERR_MSG, "access", /*createPart1*/ 1,
		/*createPart2*/ 1, &varPtr);
	iPtr->varFramePtr = savedFramePtr;
	if (!otherPtr) {
	    TRACE_ERROR(interp);
	    goto gotError;
	}
	goto doLinkVars;

    case INST_NSUPVAR:
	TRACE(("%d %.30s %.30s => ", TclGetInt4AtPtr(pc+1),
		O2S(OBJ_UNDER_TOS), O2S(OBJ_AT_TOS)));
	if (TclGetNamespaceFromObj(interp, OBJ_UNDER_TOS, &nsPtr) != TCL_OK) {
	    TRACE_ERROR(interp);
	    goto gotError;
	}

	/*
	 * Locate the other variable.
	 */

................................................................................
	savedNsPtr = iPtr->varFramePtr->nsPtr;
	iPtr->varFramePtr->nsPtr = (Namespace *) nsPtr;
	otherPtr = TclObjLookupVarEx(interp, OBJ_AT_TOS, NULL,
		(TCL_NAMESPACE_ONLY | TCL_LEAVE_ERR_MSG), "access",
		/*createPart1*/ 1, /*createPart2*/ 1, &varPtr);
	iPtr->varFramePtr->nsPtr = savedNsPtr;
	if (!otherPtr) {
	    TRACE_ERROR(interp);
	    goto gotError;
	}
	goto doLinkVars;

    case INST_VARIABLE:
	TRACE(("%d, %.30s => ", TclGetInt4AtPtr(pc+1), O2S(OBJ_AT_TOS)));
	otherPtr = TclObjLookupVarEx(interp, OBJ_AT_TOS, NULL,
		(TCL_NAMESPACE_ONLY | TCL_LEAVE_ERR_MSG), "access",
		/*createPart1*/ 1, /*createPart2*/ 1, &varPtr);
	if (!otherPtr) {
	    TRACE_ERROR(interp);
	    goto gotError;
	}

	/*
	 * Do the [variable] magic.
	 */

................................................................................

	/*
	 * If we are here, the local variable has already been created: do the
	 * little work of TclPtrMakeUpvar that remains to be done right here
	 * if there are no errors; otherwise, let it handle the case.
	 */

	opnd = TclGetInt4AtPtr(pc+1);
	varPtr = LOCAL(opnd);
	if ((varPtr != otherPtr) && !TclIsVarTraced(varPtr)
		&& (TclIsVarUndefined(varPtr) || TclIsVarLink(varPtr))) {
	    if (!TclIsVarUndefined(varPtr)) {
		/*
		 * Then it is a defined link.
		 */

		Var *linkPtr = varPtr->value.linkPtr;

		if (linkPtr == otherPtr) {
		    TRACE_APPEND(("already linked\n"));
		    NEXT_INST_F(5, 1, 0);
		}
		if (TclIsVarInHash(linkPtr)) {
		    VarHashRefCount(linkPtr)--;
		    if (TclIsVarUndefined(linkPtr)) {
			TclCleanupVar(linkPtr, NULL);
		    }
................................................................................
	    TclSetVarLink(varPtr);
	    varPtr->value.linkPtr = otherPtr;
	    if (TclIsVarInHash(otherPtr)) {
		VarHashRefCount(otherPtr)++;
	    }
	} else if (TclPtrObjMakeUpvar(interp, otherPtr, NULL, 0,
		opnd) != TCL_OK) {
	    TRACE_ERROR(interp);
	    goto gotError;
	}

	/*
	 * Do not pop the namespace or frame index, it may be needed for other
	 * variables - and [variable] did not push it at all.
	 */

	TRACE_APPEND(("link made\n"));
	NEXT_INST_F(5, 1, 0);
    }

    /*
     *	   End of variable linking instructions.
     * -----------------------------------------------------------------
     */
................................................................................

    case INST_JUMP_TRUE1:
	jmpOffset[0] = 2;
	jmpOffset[1] = TclGetInt1AtPtr(pc+1);

    doCondJump:
	valuePtr = OBJ_AT_TOS;
	TRACE(("%d => ", jmpOffset[
		(*pc==INST_JUMP_FALSE1 || *pc==INST_JUMP_FALSE4) ? 0 : 1]));

	/* TODO - check claim that taking address of b harms performance */
	/* TODO - consider optimization search for constants */
	if (TclGetBooleanFromObj(interp, valuePtr, &b) != TCL_OK) {
	    TRACE_ERROR(interp);


	    goto gotError;
	}

#ifdef TCL_COMPILE_DEBUG
	if (b) {
	    if ((*pc == INST_JUMP_TRUE1) || (*pc == INST_JUMP_TRUE4)) {
		TRACE_APPEND(("%.20s true, new pc %u\n", O2S(valuePtr),

			(unsigned)(pc + jmpOffset[1] - codePtr->codeStart)));
	    } else {

		TRACE_APPEND(("%.20s true\n", O2S(valuePtr)));
	    }
	} else {
	    if ((*pc == INST_JUMP_TRUE1) || (*pc == INST_JUMP_TRUE4)) {
		TRACE_APPEND(("%.20s false\n", O2S(valuePtr)));
	    } else {
		TRACE_APPEND(("%.20s false, new pc %u\n", O2S(valuePtr),

			(unsigned)(pc + jmpOffset[0] - codePtr->codeStart)));
	    }
	}
#endif
	NEXT_INST_F(jmpOffset[b], 1, 0);
    }

................................................................................
	/*
	 * Jump to location looked up in a hashtable; fall through to next
	 * instr if lookup fails.
	 */

	opnd = TclGetInt4AtPtr(pc+1);
	jtPtr = (JumptableInfo *) codePtr->auxDataArrayPtr[opnd].clientData;
	TRACE(("%d \"%.20s\" => ", opnd, O2S(OBJ_AT_TOS)));
	hPtr = Tcl_FindHashEntry(&jtPtr->hashTable, TclGetString(OBJ_AT_TOS));
	if (hPtr != NULL) {
	    int jumpOffset = PTR2INT(Tcl_GetHashValue(hPtr));

	    TRACE_APPEND(("found in table, new pc %u\n",
		    (unsigned)(pc - codePtr->codeStart + jumpOffset)));
	    NEXT_INST_F(jumpOffset, 1, 0);
................................................................................
	TRACE_WITH_OBJ(("=> "), objResultPtr);
	NEXT_INST_F(1, 0, 1);
    case INST_INFO_LEVEL_ARGS: {
	int level;
	register CallFrame *framePtr = iPtr->varFramePtr;
	register CallFrame *rootFramePtr = iPtr->rootFramePtr;

	if (TclGetIntFromObj(interp, OBJ_AT_TOS, &level) != TCL_OK) {
	    TRACE_WITH_OBJ(("\"%.30s\" => ERROR: ", O2S(OBJ_AT_TOS)),

		    Tcl_GetObjResult(interp));
	    goto gotError;
	}
	TRACE(("%d => ", level));
	if (level <= 0) {
	    level += framePtr->level;
	}
	for (; (framePtr->level!=level) && (framePtr!=rootFramePtr) ;
		framePtr = framePtr->callerVarPtr) {
	    /* Empty loop body */
	}
	if (framePtr == rootFramePtr) {
	    Tcl_SetObjResult(interp, Tcl_ObjPrintf(
		    "bad level \"%s\"", TclGetString(OBJ_AT_TOS)));
	    TRACE_ERROR(interp);
	    Tcl_SetErrorCode(interp, "TCL", "LOOKUP", "STACK_LEVEL",
		    TclGetString(OBJ_AT_TOS), NULL);
	    goto gotError;
	}
	objResultPtr = Tcl_NewListObj(framePtr->objc, framePtr->objv);
	TRACE_APPEND(("%.30s\n", O2S(objResultPtr)));
	NEXT_INST_F(1, 1, 1);
    }
    case INST_RESOLVE_COMMAND: {
................................................................................

	opnd = TclGetUInt4AtPtr(pc+1);
	objResultPtr = Tcl_NewListObj(opnd, &OBJ_AT_DEPTH(opnd-1));
	TRACE_WITH_OBJ(("%u => ", opnd), objResultPtr);
	NEXT_INST_V(5, opnd, 1);

    case INST_LIST_LENGTH:
	TRACE(("\"%.30s\" => ", O2S(OBJ_AT_TOS)));
	if (TclListObjLength(interp, OBJ_AT_TOS, &length) != TCL_OK) {
	    TRACE_ERROR(interp);

	    goto gotError;
	}
	TclNewIntObj(objResultPtr, length);
	TRACE_APPEND(("%d\n", length));
	NEXT_INST_F(1, 1, 1);

    case INST_LIST_INDEX:	/* lindex with objc == 3 */
	value2Ptr = OBJ_AT_TOS;
	valuePtr = OBJ_UNDER_TOS;
	TRACE(("\"%.30s\" \"%.30s\" => ", O2S(valuePtr), O2S(value2Ptr)));

	/*
	 * Extract the desired list element.
	 */

	if ((TclListObjGetElements(interp, valuePtr, &objc, &objv) == TCL_OK)
		&& (value2Ptr->typePtr != &tclListType)
................................................................................
	    tosPtr--;
	    pcAdjustment = 1;
	    goto lindexFastPath;
	}

	objResultPtr = TclLindexList(interp, valuePtr, value2Ptr);
	if (!objResultPtr) {
	    TRACE_ERROR(interp);

	    goto gotError;
	}

	/*
	 * Stash the list element on the stack.
	 */


	TRACE_APPEND(("\"%.30s\"\n", O2S(objResultPtr)));
	NEXT_INST_F(1, 2, -1);	/* Already has the correct refCount */

    case INST_LIST_INDEX_IMM:	/* lindex with objc==3 and index in bytecode
				 * stream */

	/*
	 * Pop the list and get the index.
	 */

	valuePtr = OBJ_AT_TOS;
	opnd = TclGetInt4AtPtr(pc+1);
	TRACE(("\%.30s\" %d => ", O2S(valuePtr), opnd));

	/*
	 * Get the contents of the list, making sure that it really is a list
	 * in the process.
	 */

	if (TclListObjGetElements(interp, valuePtr, &objc, &objv) != TCL_OK) {
	    TRACE_ERROR(interp);

	    goto gotError;
	}

	/*
	 * Select the list item based on the index. Negative operand means
	 * end-based indexing.
	 */
................................................................................
    lindexFastPath:
	if (index >= 0 && index < objc) {
	    objResultPtr = objv[index];
	} else {
	    TclNewObj(objResultPtr);
	}


	TRACE_APPEND(("\"%.30s\"\n", O2S(objResultPtr)));
	NEXT_INST_F(pcAdjustment, 1, 1);

    case INST_LIST_INDEX_MULTI:	/* 'lindex' with multiple index args */
	/*
	 * Determine the count of index args.
	 */

................................................................................
	opnd = TclGetUInt4AtPtr(pc+1);
	numIndices = opnd-1;

	/*
	 * Do the 'lindex' operation.
	 */

	TRACE(("%d => ", opnd));
	objResultPtr = TclLindexFlat(interp, OBJ_AT_DEPTH(numIndices),
		numIndices, &OBJ_AT_DEPTH(numIndices - 1));
	if (!objResultPtr) {
	    TRACE_ERROR(interp);
	    goto gotError;
	}

	/*
	 * Set result.
	 */

	TRACE_APPEND(("\"%.30s\"\n", O2S(objResultPtr)));
	NEXT_INST_V(5, opnd, -1);

    case INST_LSET_FLAT:
	/*
	 * Lset with 3, 5, or more args. Get the number of index args.
	 */

	opnd = TclGetUInt4AtPtr(pc + 1);
	numIndices = opnd - 2;
	TRACE(("%d => ", opnd));

	/*
	 * Get the old value of variable, and remove the stack ref. This is
	 * safe because the variable still references the object; the ref
	 * count will never go zero here - we can use the smaller macro
	 * Tcl_DecrRefCount.
	 */
................................................................................
	/*
	 * Compute the new variable value.
	 */

	objResultPtr = TclLsetFlat(interp, valuePtr, numIndices,
		&OBJ_AT_DEPTH(numIndices), OBJ_AT_TOS);
	if (!objResultPtr) {
	    TRACE_ERROR(interp);
	    goto gotError;
	}

	/*
	 * Set result.
	 */

	TRACE_APPEND(("\"%.30s\"\n", O2S(objResultPtr)));
	NEXT_INST_V(5, numIndices+1, -1);

    case INST_LSET_LIST:	/* 'lset' with 4 args */
	/*
	 * Get the old value of variable, and remove the stack ref. This is
	 * safe because the variable still references the object; the ref
	 * count will never go zero here - we can use the smaller macro
................................................................................

	/*
	 * Get the new element value, and the index list.
	 */

	valuePtr = OBJ_AT_TOS;
	value2Ptr = OBJ_UNDER_TOS;
	TRACE(("\"%.30s\" \"%.30s\" \"%.30s\" => ",
		O2S(value2Ptr), O2S(valuePtr), O2S(objPtr)));

	/*
	 * Compute the new variable value.
	 */

	objResultPtr = TclLsetList(interp, objPtr, value2Ptr, valuePtr);
	if (!objResultPtr) {
	    TRACE_ERROR(interp);

	    goto gotError;
	}

	/*
	 * Set result.
	 */

	TRACE_APPEND(("\"%.30s\"\n", O2S(objResultPtr)));
	NEXT_INST_F(1, 2, -1);

    case INST_LIST_RANGE_IMM:	/* lrange with objc==4 and both indices in
				 * bytecode stream */

	/*
	 * Pop the list and get the indices.
	 */

	valuePtr = OBJ_AT_TOS;
	fromIdx = TclGetInt4AtPtr(pc+1);
	toIdx = TclGetInt4AtPtr(pc+5);
	TRACE(("\"%.30s\" %d %d => ", O2S(valuePtr), TclGetInt4AtPtr(pc+1),
		TclGetInt4AtPtr(pc+5)));

	/*
	 * Get the contents of the list, making sure that it really is a list
	 * in the process.
	 */

	if (TclListObjGetElements(interp, valuePtr, &objc, &objv) != TCL_OK) {
	    TRACE_ERROR(interp);

	    goto gotError;
	}

	/*
	 * Skip a lot of work if we're about to throw the result away (common
	 * with uses of [lassign]).
	 */
................................................................................
		 * BEWARE! This is looking inside the implementation of the
		 * list type.
		 */

		List *listPtr = valuePtr->internalRep.twoPtrValue.ptr1;

		if (listPtr->refCount == 1) {


		    for (index=toIdx+1; index<objc ; index++) {
			TclDecrRefCount(objv[index]);
		    }
		    listPtr->elemCount = toIdx+1;
		    listPtr->canonicalFlag = 1;
		    TclInvalidateStringRep(valuePtr);
		    TRACE_APPEND(("%.30s\n", O2S(valuePtr)));
................................................................................
		}
	    }
	    objResultPtr = Tcl_NewListObj(toIdx-fromIdx+1, objv+fromIdx);
	} else {
	    TclNewObj(objResultPtr);
	}

	TRACE_APPEND(("\"%.30s\"", O2S(objResultPtr)));

	NEXT_INST_F(9, 1, 1);

    case INST_LIST_IN:
    case INST_LIST_NOT_IN:	/* Basic list containment operators. */
	value2Ptr = OBJ_AT_TOS;
	valuePtr = OBJ_UNDER_TOS;

	s1 = TclGetStringFromObj(valuePtr, &s1len);
	TRACE(("\"%.30s\" \"%.30s\" => ", O2S(valuePtr), O2S(value2Ptr)));
	if (TclListObjLength(interp, value2Ptr, &length) != TCL_OK) {

	    TRACE_ERROR(interp);
	    goto gotError;
	}
	match = 0;
	if (length > 0) {
	    int i = 0;
	    Tcl_Obj *o;

................................................................................
	    } while (i < length && match == 0);
	}

	if (*pc == INST_LIST_NOT_IN) {
	    match = !match;
	}

	TRACE_APPEND(("%d\n", match));

	/*
	 * Peep-hole optimisation: if you're about to jump, do jump from here.
	 * We're saving the effort of pushing a boolean value only to pop it
	 * for branching.
	 */

................................................................................
	value2Ptr = OBJ_AT_TOS;
	valuePtr = OBJ_UNDER_TOS;
	TRACE(("\"%.30s\" \"%.30s\" => ", O2S(valuePtr), O2S(value2Ptr)));
	if (Tcl_IsShared(valuePtr)) {
	    objResultPtr = Tcl_DuplicateObj(valuePtr);
	    if (Tcl_ListObjAppendList(interp, objResultPtr,
		    value2Ptr) != TCL_OK) {
		TRACE_ERROR(interp);
		TclDecrRefCount(objResultPtr);
		goto gotError;
	    }
	    TRACE_APPEND(("\"%.30s\"\n", O2S(objResultPtr)));
	    NEXT_INST_F(1, 2, 1);
	} else {
	    if (Tcl_ListObjAppendList(interp, valuePtr, value2Ptr) != TCL_OK){
		TRACE_ERROR(interp);
		goto gotError;
	    }
	    TRACE_APPEND(("\"%.30s\"\n", O2S(valuePtr)));
	    NEXT_INST_F(1, 1, 0);
	}

    /*
................................................................................
	TclNewIntObj(objResultPtr, length);
	TRACE(("%.20s => %d\n", O2S(valuePtr), length));
	NEXT_INST_F(1, 1, 1);

    case INST_STR_INDEX:
	value2Ptr = OBJ_AT_TOS;
	valuePtr = OBJ_UNDER_TOS;
	TRACE(("\"%.20s\" %.20s => ", O2S(valuePtr), O2S(value2Ptr)));

	/*
	 * Get char length to calulate what 'end' means.
	 */

	length = Tcl_GetCharLength(valuePtr);
	if (TclGetIntForIndexM(interp, value2Ptr, length-1, &index)!=TCL_OK) {
	    TRACE_ERROR(interp);
	    goto gotError;
	}

	if ((index < 0) || (index >= length)) {
	    TclNewObj(objResultPtr);
	} else if (TclIsPureByteArray(valuePtr)) {
	    objResultPtr = Tcl_NewByteArrayObj(
................................................................................
	     * practical use.
	     */

	    length = Tcl_UniCharToUtf(ch, buf);
	    objResultPtr = Tcl_NewStringObj(buf, length);
	}


	TRACE_APPEND(("\"%s\"\n", O2S(objResultPtr)));
	NEXT_INST_F(1, 2, 1);

    case INST_STR_RANGE:
	TRACE(("\"%.20s\" %.20s %.20s =>",
		O2S(OBJ_AT_DEPTH(2)), O2S(OBJ_UNDER_TOS), O2S(OBJ_AT_TOS)));
	length = Tcl_GetCharLength(OBJ_AT_DEPTH(2)) - 1;
	if (TclGetIntForIndexM(interp, OBJ_UNDER_TOS, length,
		    &fromIdx) != TCL_OK
	    || TclGetIntForIndexM(interp, OBJ_AT_TOS, length,
		    &toIdx) != TCL_OK) {
	    TRACE_ERROR(interp);
	    goto gotError;
	}

	if (fromIdx < 0) {
	    fromIdx = 0;
	}
	if (toIdx >= length) {
................................................................................
	TRACE(("%s %s => ", O2S(valuePtr), O2S(value2Ptr)));
	objResultPtr = ExecuteExtendedBinaryMathOp(interp, *pc, &TCONST(0),
		valuePtr, value2Ptr);
	if (objResultPtr == DIVIDED_BY_ZERO) {
	    TRACE_APPEND(("DIVIDE BY ZERO\n"));
	    goto divideByZero;
	} else if (objResultPtr == GENERAL_ARITHMETIC_ERROR) {
	    TRACE_ERROR(interp);

	    goto gotError;
	} else if (objResultPtr == NULL) {
	    TRACE_APPEND(("%s\n", O2S(valuePtr)));
	    NEXT_INST_F(1, 1, 0);
	} else {
	    TRACE_APPEND(("%s\n", O2S(objResultPtr)));
	    NEXT_INST_F(1, 2, 1);
................................................................................
	if (objResultPtr == DIVIDED_BY_ZERO) {
	    TRACE_APPEND(("DIVIDE BY ZERO\n"));
	    goto divideByZero;
	} else if (objResultPtr == EXPONENT_OF_ZERO) {
	    TRACE_APPEND(("EXPONENT OF ZERO\n"));
	    goto exponOfZero;
	} else if (objResultPtr == GENERAL_ARITHMETIC_ERROR) {
	    TRACE_ERROR(interp);

	    goto gotError;
	} else if (objResultPtr == NULL) {
	    TRACE_APPEND(("%s\n", O2S(valuePtr)));
	    NEXT_INST_F(1, 1, 0);
	} else {
	    TRACE_APPEND(("%s\n", O2S(objResultPtr)));
	    NEXT_INST_F(1, 2, 1);
................................................................................
    case INST_FOREACH_STEP4: /* DEPRECATED */
	/*
	 * "Step" a foreach loop (i.e., begin its next iteration) by assigning
	 * the next value list element to each loop var.
	 */

	opnd = TclGetUInt4AtPtr(pc+1);
	TRACE(("%u => ", opnd));
	infoPtr = codePtr->auxDataArrayPtr[opnd].clientData;
	numLists = infoPtr->numLists;

	/*
	 * Increment the temp holding the loop iteration number.
	 */

................................................................................
	for (i = 0;  i < numLists;  i++) {
	    varListPtr = infoPtr->varLists[i];
	    numVars = varListPtr->numVars;

	    listVarPtr = LOCAL(listTmpIndex);
	    listPtr = listVarPtr->value.objPtr;
	    if (TclListObjLength(interp, listPtr, &listLen) != TCL_OK) {
		TRACE_APPEND(("ERROR converting list %ld, \"%.30s\": %s\n",
			i, O2S(listPtr), O2S(Tcl_GetObjResult(interp))));
		goto gotError;
	    }
	    if (listLen > iterNum * numVars) {
		continueLoop = 1;
	    }
	    listTmpIndex++;
	}
................................................................................
			    Tcl_IncrRefCount(valuePtr);
			}
		    } else {
			DECACHE_STACK_INFO();
			if (TclPtrSetVar(interp, varPtr, NULL, NULL, NULL,
				valuePtr, TCL_LEAVE_ERR_MSG, varIndex)==NULL){
			    CACHE_STACK_INFO();
			    TRACE_APPEND((
				    "ERROR init. index temp %d: %s\n",
				    varIndex, O2S(Tcl_GetObjResult(interp))));
			    TclDecrRefCount(listPtr);
			    goto gotError;
			}
			CACHE_STACK_INFO();
		    }
		    valIndex++;
		}
		TclDecrRefCount(listPtr);
		listTmpIndex++;
	    }
	}
	TRACE_APPEND(("%d lists, iter %d, %s loop\n", opnd, numLists,
		iterNum, (continueLoop? "continue" : "exit")));

	/*
	 * Run-time peep-hole optimisation: the compiler ALWAYS follows
	 * INST_FOREACH_STEP4 with an INST_JUMP_FALSE. We just skip that
	 * instruction and jump direct from here.
	 */
................................................................................
		}
		listTmpDepth--;
	    }
	    /* loopCtTemp being 'misused' for storing the jump size */
	    NEXT_INST_F(infoPtr->loopCtTemp, 0, 0);
	}

#ifdef TCL_COMPILE_DEBUG
	NEXT_INST_F(1, 0, 0);
#else
	/*
	 * FALL THROUGH
	 */
	pc++;
#endif

    case INST_FOREACH_END:
	/* THIS INSTRUCTION IS ONLY CALLED AS A BREAK TARGET */
	tmpPtr = OBJ_AT_TOS;
	infoPtr = tmpPtr->internalRep.otherValuePtr;
	numLists = infoPtr->numLists;
	NEXT_INST_V(1, numLists+2, 0);
................................................................................
	}
	TRACE_APPEND(("OK\n"));
	NEXT_INST_F(1, 1, 0);

    case INST_DICT_GET:
    case INST_DICT_EXISTS: {
	register Tcl_Interp *interp2 = interp;
	register int found;

	opnd = TclGetUInt4AtPtr(pc+1);
	TRACE(("%u => ", opnd));
	dictPtr = OBJ_AT_DEPTH(opnd);
	if (*pc == INST_DICT_EXISTS) {
	    interp2 = NULL;
	}
	if (opnd > 1) {
	    dictPtr = TclTraceDictPath(interp2, dictPtr, opnd-1,
		    &OBJ_AT_DEPTH(opnd-1), DICT_PATH_READ);
	    if (dictPtr == NULL) {
		if (*pc == INST_DICT_EXISTS) {
		    found = 0;
		    goto afterDictExists;
		}
		TRACE_WITH_OBJ((
			"ERROR tracing dictionary path into \"%s\": ",
			O2S(OBJ_AT_DEPTH(opnd))),
			Tcl_GetObjResult(interp));
		goto gotError;
	    }
	}
	if (Tcl_DictObjGet(interp2, dictPtr, OBJ_AT_TOS,
		&objResultPtr) == TCL_OK) {
	    if (*pc == INST_DICT_EXISTS) {
		found = (objResultPtr ? 1 : 0);
		goto afterDictExists;

	    }
	    if (!objResultPtr) {



		DECACHE_STACK_INFO();
		Tcl_SetObjResult(interp, Tcl_ObjPrintf(
			"key \"%s\" not known in dictionary",
			TclGetString(OBJ_AT_TOS)));
		Tcl_SetErrorCode(interp, "TCL", "LOOKUP", "DICT",
			TclGetString(OBJ_AT_TOS), NULL);
		CACHE_STACK_INFO();





		TRACE_ERROR(interp);
		goto gotError;
	    }
	    TRACE_APPEND(("%.30s\n", O2S(objResultPtr)));
	    NEXT_INST_V(5, opnd+1, 1);


	} else if (*pc != INST_DICT_EXISTS) {
	    TRACE_APPEND(("ERROR reading leaf dictionary key \"%.30s\": %s",
		    O2S(dictPtr), O2S(Tcl_GetObjResult(interp))));
	    goto gotError;
	} else {
	    found = 0;
	}
    afterDictExists:
#ifndef TCL_COMPILE_DEBUG
	/*
	 * The INST_DICT_EXISTS instruction is usually followed by a
	 * conditional jump, so we can take advantage of this to do some
	 * peephole optimization (note that we're careful to not close out
	 * someone doing something else).
	 */

	pc += 5;
	switch (*pc) {
	case INST_JUMP_FALSE1:
	    NEXT_INST_V((found ? 2 : TclGetInt1AtPtr(pc+1)), opnd+1, 0);
	case INST_JUMP_FALSE4:
	    NEXT_INST_V((found ? 5 : TclGetInt4AtPtr(pc+1)), opnd+1, 0);
	case INST_JUMP_TRUE1:
	    NEXT_INST_V((found ? TclGetInt1AtPtr(pc+1) : 2), opnd+1, 0);
	case INST_JUMP_TRUE4:
	    NEXT_INST_V((found ? TclGetInt4AtPtr(pc+1) : 5), opnd+1, 0);
	default:
	    pc -= 5;
	    /* fall through to non-debug handling */
	}
#endif
	TRACE_APPEND(("%d\n", found));
	objResultPtr = TCONST(found);
	NEXT_INST_V(5, opnd+1, 1);
    }

    case INST_DICT_SET:
    case INST_DICT_UNSET:
    case INST_DICT_INCR_IMM:
	opnd = TclGetUInt4AtPtr(pc+1);
	opnd2 = TclGetUInt4AtPtr(pc+5);
................................................................................
	    Tcl_IncrRefCount(dictPtr);
	    DECACHE_STACK_INFO();
	    objResultPtr = TclPtrSetVar(interp, varPtr, NULL, NULL, NULL,
		    dictPtr, TCL_LEAVE_ERR_MSG, opnd2);
	    CACHE_STACK_INFO();
	    TclDecrRefCount(dictPtr);
	    if (objResultPtr == NULL) {
		TRACE_ERROR(interp);

		goto gotError;
	    }
	}
#ifndef TCL_COMPILE_DEBUG
	if (*(pc+9) == INST_POP) {
	    NEXT_INST_V(10, cleanup, 0);
	}
#endif
	TRACE_APPEND(("\"%.30s\"\n", O2S(objResultPtr)));
	NEXT_INST_V(9, cleanup, 1);

    case INST_DICT_APPEND:
    case INST_DICT_LAPPEND:
	opnd = TclGetUInt4AtPtr(pc+1);
	varPtr = LOCAL(opnd);
	while (TclIsVarLink(varPtr)) {
................................................................................
	}

	if (Tcl_DictObjGet(interp, dictPtr, OBJ_UNDER_TOS,
		&valuePtr) != TCL_OK) {
	    if (allocateDict) {
		TclDecrRefCount(dictPtr);
	    }
	    TRACE_ERROR(interp);
	    goto gotError;
	}

	/*
	 * Note that a non-existent key results in a NULL valuePtr, which is a
	 * case handled separately below. What we *can* say at this point is
	 * that the write-back will always succeed.
................................................................................
		valuePtr = Tcl_DuplicateObj(valuePtr);
		if (Tcl_ListObjAppendElement(interp, valuePtr,
			OBJ_AT_TOS) != TCL_OK) {
		    TclDecrRefCount(valuePtr);
		    if (allocateDict) {
			TclDecrRefCount(dictPtr);
		    }
		    TRACE_ERROR(interp);
		    goto gotError;
		}
		Tcl_DictObjPut(NULL, dictPtr, OBJ_UNDER_TOS, valuePtr);
	    } else {
		if (Tcl_ListObjAppendElement(interp, valuePtr,
			OBJ_AT_TOS) != TCL_OK) {
		    if (allocateDict) {
			TclDecrRefCount(dictPtr);
		    }
		    TRACE_ERROR(interp);
		    goto gotError;
		}

		/*
		 * Must invalidate the string representation of dictionary
		 * here because we have directly updated the internal
		 * representation; if we don't, callers could see the wrong
................................................................................
	    Tcl_IncrRefCount(dictPtr);
	    DECACHE_STACK_INFO();
	    objResultPtr = TclPtrSetVar(interp, varPtr, NULL, NULL, NULL,
		    dictPtr, TCL_LEAVE_ERR_MSG, opnd);
	    CACHE_STACK_INFO();
	    TclDecrRefCount(dictPtr);
	    if (objResultPtr == NULL) {
		TRACE_ERROR(interp);

		goto gotError;
	    }
	}
#ifndef TCL_COMPILE_DEBUG
	if (*(pc+5) == INST_POP) {
	    NEXT_INST_F(6, 2, 0);
	}
................................................................................
	opnd = TclGetUInt4AtPtr(pc+1);
	TRACE(("%u => ", opnd));
	dictPtr = POP_OBJECT();
	searchPtr = ckalloc(sizeof(Tcl_DictSearch));
	if (Tcl_DictObjFirst(interp, dictPtr, searchPtr, &keyPtr,
		&valuePtr, &done) != TCL_OK) {
	    ckfree(searchPtr);
	    TRACE_ERROR(interp);
	    goto gotError;
	}
	TclNewObj(statePtr);
	statePtr->typePtr = &dictIteratorType;
	statePtr->internalRep.twoPtrValue.ptr1 = searchPtr;
	statePtr->internalRep.twoPtrValue.ptr2 = dictPtr;
	varPtr = LOCAL(opnd);
................................................................................
	objResultPtr = TCONST(done);
	/* TODO: consider opt like INST_FOREACH_STEP4 */
	NEXT_INST_F(5, 0, 1);

    case INST_DICT_UPDATE_START:
	opnd = TclGetUInt4AtPtr(pc+1);
	opnd2 = TclGetUInt4AtPtr(pc+5);
	TRACE(("%u => ", opnd));
	varPtr = LOCAL(opnd);
	duiPtr = codePtr->auxDataArrayPtr[opnd2].clientData;
	while (TclIsVarLink(varPtr)) {
	    varPtr = varPtr->value.linkPtr;
	}

	if (TclIsVarDirectReadable(varPtr)) {
	    dictPtr = varPtr->value.objPtr;
	} else {
	    DECACHE_STACK_INFO();
	    dictPtr = TclPtrGetVar(interp, varPtr, NULL, NULL, NULL,
		    TCL_LEAVE_ERR_MSG, opnd);
	    CACHE_STACK_INFO();
	    if (dictPtr == NULL) {
		TRACE_ERROR(interp);
		goto gotError;
	    }
	}
	if (TclListObjGetElements(interp, OBJ_AT_TOS, &length,
		&keyPtrPtr) != TCL_OK) {
	    TRACE_ERROR(interp);
	    goto gotError;
	}
	if (length != duiPtr->length) {
	    Tcl_Panic("dictUpdateStart argument length mismatch");
	}
	for (i=0 ; i<length ; i++) {
	    if (Tcl_DictObjGet(interp, dictPtr, keyPtrPtr[i],
		    &valuePtr) != TCL_OK) {
		TRACE_ERROR(interp);
		goto gotError;
	    }
	    varPtr = LOCAL(duiPtr->varIndices[i]);
	    while (TclIsVarLink(varPtr)) {
		varPtr = varPtr->value.linkPtr;
	    }
	    DECACHE_STACK_INFO();
................................................................................
		TclObjUnsetVar2(interp,
			localName(iPtr->varFramePtr, duiPtr->varIndices[i]),
			NULL, 0);
	    } else if (TclPtrSetVar(interp, varPtr, NULL, NULL, NULL,
		    valuePtr, TCL_LEAVE_ERR_MSG,
		    duiPtr->varIndices[i]) == NULL) {
		CACHE_STACK_INFO();
		TRACE_ERROR(interp);
		goto gotError;
	    }
	    CACHE_STACK_INFO();
	}
	TRACE_APPEND(("OK\n"));
	NEXT_INST_F(9, 0, 0);

    case INST_DICT_UPDATE_END:
	opnd = TclGetUInt4AtPtr(pc+1);
	opnd2 = TclGetUInt4AtPtr(pc+5);
	TRACE(("%u => ", opnd));
	varPtr = LOCAL(opnd);
	duiPtr = codePtr->auxDataArrayPtr[opnd2].clientData;
	while (TclIsVarLink(varPtr)) {
	    varPtr = varPtr->value.linkPtr;
	}

	if (TclIsVarDirectReadable(varPtr)) {
	    dictPtr = varPtr->value.objPtr;
	} else {
	    DECACHE_STACK_INFO();
	    dictPtr = TclPtrGetVar(interp, varPtr, NULL, NULL, NULL, 0, opnd);
	    CACHE_STACK_INFO();
	}
	if (dictPtr == NULL) {
	    TRACE_APPEND(("storage was unset\n"));
	    NEXT_INST_F(9, 1, 0);
	}
	if (Tcl_DictObjSize(interp, dictPtr, &length) != TCL_OK
		|| TclListObjGetElements(interp, OBJ_AT_TOS, &length,
			&keyPtrPtr) != TCL_OK) {
	    TRACE_ERROR(interp);
	    goto gotError;
	}
	allocdict = Tcl_IsShared(dictPtr);
	if (allocdict) {
	    dictPtr = Tcl_DuplicateObj(dictPtr);
	}
	if (length > 0) {
................................................................................
	    objResultPtr = TclPtrSetVar(interp, varPtr, NULL, NULL, NULL,
		    dictPtr, TCL_LEAVE_ERR_MSG, opnd);
	    CACHE_STACK_INFO();
	    if (objResultPtr == NULL) {
		if (allocdict) {
		    TclDecrRefCount(dictPtr);
		}
		TRACE_ERROR(interp);
		goto gotError;
	    }
	}
	TRACE_APPEND(("written back\n"));
	NEXT_INST_F(9, 1, 0);

    case INST_DICT_EXPAND:
	dictPtr = OBJ_UNDER_TOS;
	listPtr = OBJ_AT_TOS;
	TRACE(("%.30s %.30s =>", O2S(dictPtr), O2S(listPtr)));
	if (TclListObjGetElements(interp, listPtr, &objc, &objv) != TCL_OK) {

	    TRACE_ERROR(interp);
	    goto gotError;
	}
	objResultPtr = TclDictWithInit(interp, dictPtr, objc, objv);
	if (objResultPtr == NULL) {
	    TRACE_ERROR(interp);

	    goto gotError;
	}

	TRACE_APPEND(("%.30s\n", O2S(objResultPtr)));
	NEXT_INST_F(1, 2, 1);

    case INST_DICT_RECOMBINE_STK:
	keysPtr = POP_OBJECT();
	varNamePtr = OBJ_UNDER_TOS;
	listPtr = OBJ_AT_TOS;
	TRACE(("\"%.30s\" \"%.30s\" \"%.30s\" => ",
		O2S(varNamePtr), O2S(valuePtr), O2S(keysPtr)));
	if (TclListObjGetElements(interp, listPtr, &objc, &objv) != TCL_OK) {
	    TRACE_ERROR(interp);
	    TclDecrRefCount(keysPtr);
	    goto gotError;
	}
	varPtr = TclObjLookupVarEx(interp, varNamePtr, NULL,
		TCL_LEAVE_ERR_MSG, "set", 1, 1, &arrayPtr);
	if (varPtr == NULL) {
	    TRACE_ERROR(interp);
	    TclDecrRefCount(keysPtr);
	    goto gotError;
	}
	DECACHE_STACK_INFO();
	result = TclDictWithFinish(interp, varPtr,arrayPtr,varNamePtr,NULL,-1,
		objc, objv, keysPtr);
	CACHE_STACK_INFO();
	TclDecrRefCount(keysPtr);
	if (result != TCL_OK) {
	    TRACE_ERROR(interp);
	    goto gotError;
	}
	TRACE_APPEND(("OK\n"));
	NEXT_INST_F(1, 2, 0);

    case INST_DICT_RECOMBINE_IMM:
	opnd = TclGetUInt4AtPtr(pc+1);
	listPtr = OBJ_UNDER_TOS;
	keysPtr = OBJ_AT_TOS;
	varPtr = LOCAL(opnd);
	TRACE(("%u <- \"%.30s\" \"%.30s\" => ", opnd, O2S(valuePtr),
		O2S(keysPtr)));
	if (TclListObjGetElements(interp, listPtr, &objc, &objv) != TCL_OK) {
	    TRACE_ERROR(interp);
	    goto gotError;
	}
	while (TclIsVarLink(varPtr)) {
	    varPtr = varPtr->value.linkPtr;
	}
	DECACHE_STACK_INFO();
	result = TclDictWithFinish(interp, varPtr, NULL, NULL, NULL, opnd,
		objc, objv, keysPtr);
	CACHE_STACK_INFO();
	if (result != TCL_OK) {
	    TRACE_ERROR(interp);
	    goto gotError;
	}
	TRACE_APPEND(("OK\n"));
	NEXT_INST_F(5, 2, 0);
    }

    /*