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Make bugpoint ehpad/token friendly

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Tokens shouldn't be blindly replaced with undef/null.  Also, don't try
to remove EH pad instructions from the top of basic blocks.

llvm-svn: 252414
This commit is contained in:
David Majnemer 2015-11-08 04:16:12 +00:00
parent b682989c7b
commit 5efe6aaf0c
1 changed files with 5 additions and 4 deletions
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9
tools/bugpoint/CrashDebugger.cpp
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@ -373,8 +373,9 @@ bool ReduceCrashingBlocks::TestBlocks(std::vector<const BasicBlock*> &BBs) {
(*SI)->removePredecessor(&*BB);
TerminatorInst *BBTerm = BB->getTerminator();
if (!BB->getTerminator()->getType()->isVoidTy())
if (BBTerm->isEHPad())
continue;
if (!BBTerm->getType()->isVoidTy() && !BBTerm->getType()->isTokenTy())
BBTerm->replaceAllUsesWith(Constant::getNullValue(BBTerm->getType()));
// Replace the old terminator instruction.
@ -476,7 +477,7 @@ bool ReduceCrashingInstructions::TestInsts(std::vector<const Instruction*>
Instruction *Inst = &*I++;
if (!Instructions.count(Inst) && !isa<TerminatorInst>(Inst) &&
!Inst->isEHPad()) {
if (!Inst->getType()->isVoidTy())
if (!Inst->getType()->isVoidTy() && !Inst->getType()->isTokenTy())
Inst->replaceAllUsesWith(UndefValue::get(Inst->getType()));
Inst->eraseFromParent();
}
@ -785,7 +786,7 @@ static bool DebugACrash(BugDriver &BD,
} else {
if (BugpointIsInterrupted) goto ExitLoops;
if (isa<LandingPadInst>(I))
if (I->isEHPad() || I->getType()->isTokenTy())
continue;
outs() << "Checking instruction: " << *I;