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Do not crash when dealing with invoke and unwind instructions!

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10160 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2003-11-22 02:10:38 +00:00
parent 89eca9097d
commit 8bc098be0c
1 changed files with 7 additions and 4 deletions
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11
tools/bugpoint/CrashDebugger.cpp
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@ -195,20 +195,23 @@ bool ReduceCrashingBlocks::TestBlocks(std::vector<BasicBlock*> &BBs) {
// Loop over and delete any hack up any blocks that are not listed...
for (Module::iterator I = M->begin(), E = M->end(); I != E; ++I)
for (Function::iterator BB = I->begin(), E = I->end(); BB != E; ++BB)
if (!Blocks.count(BB) && !isa<ReturnInst>(BB->getTerminator())) {
if (!Blocks.count(BB) && BB->getTerminator()->getNumSuccessors()) {
// Loop over all of the successors of this block, deleting any PHI nodes
// that might include it.
for (succ_iterator SI = succ_begin(BB), E = succ_end(BB); SI != E; ++SI)
(*SI)->removePredecessor(BB);
if (BB->getTerminator()->getType() != Type::VoidTy)
BB->getTerminator()->replaceAllUsesWith(
Constant::getNullValue(BB->getTerminator()->getType()));
// Delete the old terminator instruction...
BB->getInstList().pop_back();
// Add a new return instruction of the appropriate type...
const Type *RetTy = BB->getParent()->getReturnType();
ReturnInst *RI = new ReturnInst(RetTy == Type::VoidTy ? 0 :
Constant::getNullValue(RetTy));
BB->getInstList().push_back(RI);
new ReturnInst(RetTy == Type::VoidTy ? 0 :
Constant::getNullValue(RetTy), BB);
}
// The CFG Simplifier pass may delete one of the basic blocks we are