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Loosen up the requirements in the Horrible Hack(tm) to include all selectors

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which don't have a catch-all associated with them not just clean-ups. This fixes
the SingleSource/Benchmarks/Shootout-C++/except.cpp testcase that broke because
of my change r105902.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106772 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Bill Wendling 2010-06-24 18:49:10 +00:00
parent 761fa7af9e
commit efbf306107
1 changed files with 10 additions and 30 deletions
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40
lib/CodeGen/DwarfEHPrepare.cpp
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@ -89,7 +89,7 @@ namespace {
/// initializer instead.
bool CleanupSelectors();
bool IsACleanupSelector(IntrinsicInst *);
bool HasCatchAllInSelector(IntrinsicInst *);
/// FindAllCleanupSelectors - Find all eh.selector calls that are clean-ups.
void FindAllCleanupSelectors(SmallPtrSet<IntrinsicInst*, 32> &Sels);
@ -188,34 +188,14 @@ FunctionPass *llvm::createDwarfEHPass(const TargetMachine *tm, bool fast) {
return new DwarfEHPrepare(tm, fast);
}
/// IsACleanupSelector - Return true if the intrinsic instruction is a clean-up
/// selector instruction.
bool DwarfEHPrepare::IsACleanupSelector(IntrinsicInst *II) {
unsigned NumOps = II->getNumOperands();
bool IsCleanUp = (NumOps == 3);
/// HasCatchAllInSelector - Return true if the intrinsic instruction has a
/// catch-all.
bool DwarfEHPrepare::HasCatchAllInSelector(IntrinsicInst *II) {
if (!EHCatchAllValue) return false;
if (IsCleanUp)
return true;
if (ConstantInt *CI = dyn_cast<ConstantInt>(II->getOperand(3))) {
unsigned Val = CI->getZExtValue();
if (Val == 0 || Val + 3 == NumOps) {
// If the value is 0 or the selector has only filters in it, then it's
// a cleanup.
return true;
} else {
assert(Val + 3 < NumOps && "Ill-formed eh.selector!");
if (Val + 4 == NumOps) {
if (ConstantInt *FinalVal =
dyn_cast<ConstantInt>(II->getOperand(NumOps - 1)))
return FinalVal->isZero();
}
}
}
return false;
unsigned OpIdx = II->getNumOperands() - 1;
GlobalVariable *GV = dyn_cast<GlobalVariable>(II->getOperand(OpIdx));
return GV == EHCatchAllValue;
}
/// FindAllCleanupSelectors - Find all eh.selector calls that are clean-ups.
@ -229,7 +209,7 @@ FindAllCleanupSelectors(SmallPtrSet<IntrinsicInst*, 32> &Sels) {
if (II->getParent()->getParent() != F)
continue;
if (IsACleanupSelector(II))
if (!HasCatchAllInSelector(II))
Sels.insert(II);
}
}
@ -387,7 +367,7 @@ bool DwarfEHPrepare::HandleURoRInvokes() {
// need to convert it to a 'catch-all'.
for (SmallPtrSet<IntrinsicInst*, 8>::iterator
SI = SelCalls.begin(), SE = SelCalls.end(); SI != SE; ++SI)
if (IsACleanupSelector(*SI))
if (!HasCatchAllInSelector(*SI))
SelsToConvert.insert(*SI);
}
}