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The exception handling intrinsics return values,

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so must be lowered to a value, not nothing at all.
Subtle point: I made eh_selector return 0 and
eh_typeid_for return 1.  This means that only
cleanups (destructors) will be run as the exception
unwinds [if eh_typeid_for returned 0 then it would
be as if the first catch always matched, and the
corresponding handler would be run], which is
probably want you want in the CBE.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37947 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Duncan Sands 2007-07-06 14:46:23 +00:00
parent d8ebb3a0c2
commit f664e41b20
2 changed files with 11 additions and 2 deletions
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10
lib/CodeGen/IntrinsicLowering.cpp
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@ -706,9 +706,17 @@ void IntrinsicLowering::LowerIntrinsicCall(CallInst *CI) {
case Intrinsic::dbg_region_end:
case Intrinsic::dbg_func_start:
case Intrinsic::dbg_declare:
break; // Simply strip out debugging intrinsics
case Intrinsic::eh_exception:
case Intrinsic::eh_selector:
break; // Simply strip out debugging and eh intrinsics
CI->replaceAllUsesWith(Constant::getNullValue(CI->getType()));
break;
case Intrinsic::eh_typeid_for:
// Return something different to eh_selector.
CI->replaceAllUsesWith(ConstantInt::get(CI->getType(), 1));
break;
case Intrinsic::var_annotation:
break; // Strip out annotate intrinsic

3
lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
View File

@ -2716,7 +2716,8 @@ SelectionDAGLowering::visitIntrinsicCall(CallInst &I, unsigned Intrinsic) {
unsigned TypeID = MMI->getTypeIDFor(GV);
setValue(&I, DAG.getConstant(TypeID, MVT::i32));
} else {
setValue(&I, DAG.getConstant(0, MVT::i32));
// Return something different to eh_selector.
setValue(&I, DAG.getConstant(1, MVT::i32));
}
return 0;