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Clean up the code a bit. Use isInstructionTriviallyDead to be more aggressive

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and more correct than use_empty().  This fixes PR635 and
SimplifyCFG/2005-10-02-InvokeSimplify.ll


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23616 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2005-10-03 23:43:43 +00:00
parent 457029c244
commit 7a66e686fe
1 changed files with 8 additions and 4 deletions
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12
lib/Transforms/Utils/SimplifyCFG.cpp
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@ -1284,12 +1284,16 @@ bool llvm::SimplifyCFG(BasicBlock *BB) {
FalseValue, "retval", BI);
else
NewRetVal = TrueValue;
DEBUG(std::cerr << "\nCHANGING BRANCH TO TWO RETURNS INTO SELECT:"
<< "\n " << *BI << "Select = " << *NewRetVal
<< "TRUEBLOCK: " << *TrueSucc << "FALSEBLOCK: "<< *FalseSucc);
new ReturnInst(NewRetVal, BI);
BI->getParent()->getInstList().erase(BI);
if (BrCond->use_empty())
if (Instruction *BrCondI = dyn_cast<Instruction>(BrCond))
BrCondI->getParent()->getInstList().erase(BrCondI);
BI->eraseFromParent();
if (Instruction *BrCondI = dyn_cast<Instruction>(BrCond))
if (isInstructionTriviallyDead(BrCondI))
BrCondI->eraseFromParent();
return true;
}
}