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| author | dkf <donal.k.fellows@manchester.ac.uk> | 2013-10-15 00:27:56 (GMT) |
|---|---|---|
| committer | dkf <donal.k.fellows@manchester.ac.uk> | 2013-10-15 00:27:56 (GMT) |
| commit | 2aaf426036b86f6521dfb6d80b2641e8097e832d (patch) | |
| tree | 7ee2b0d64d3baf69e1ed93317f150a8d59b9b25f /generic/tclCompCmdsGR.c | |
| parent | e15b769c9d61251dfb59993b3ed7c6b878fd4151 (diff) | |
| download | tcl-2aaf426036b86f6521dfb6d80b2641e8097e832d.zip tcl-2aaf426036b86f6521dfb6d80b2641e8097e832d.tar.gz tcl-2aaf426036b86f6521dfb6d80b2641e8097e832d.tar.bz2 | |
Do jump generation at places where INST_RETURN_IMM might occur.
Diffstat (limited to 'generic/tclCompCmdsGR.c')
| -rw-r--r-- | generic/tclCompCmdsGR.c | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/generic/tclCompCmdsGR.c b/generic/tclCompCmdsGR.c index 3efcba7..5513b01 100644 --- a/generic/tclCompCmdsGR.c +++ b/generic/tclCompCmdsGR.c @@ -2480,7 +2480,6 @@ TclCompileReturnCmd( * emit the INST_RETURN_IMM instruction with code and level as operands. */ - // TODO: when (code==TCL_BREAK || code==TCL_CONTINUE)&&(level==0&&size==0), check for stack balance and jump opportunities CompileReturnInternal(envPtr, INST_RETURN_IMM, code, level, returnOpts); return TCL_OK; @@ -2522,6 +2521,23 @@ CompileReturnInternal( int level, Tcl_Obj *returnOpts) { + if (level == 0 && (code == TCL_BREAK || code == TCL_CONTINUE)) { + ExceptionRange *rangePtr; + ExceptionAux *exceptAux; + + rangePtr = TclGetInnermostExceptionRange(envPtr, code, &exceptAux); + if (rangePtr && rangePtr->type == LOOP_EXCEPTION_RANGE) { + TclCleanupStackForBreakContinue(envPtr, exceptAux); + if (code == TCL_BREAK) { + TclAddLoopBreakFixup(envPtr, exceptAux); + } else { + TclAddLoopContinueFixup(envPtr, exceptAux); + } + Tcl_DecrRefCount(returnOpts); + return; + } + } + TclEmitPush(TclAddLiteralObj(envPtr, returnOpts, NULL), envPtr); TclEmitInstInt4(op, code, envPtr); TclEmitInt4(level, envPtr); |