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Use IRBuilder while simplifying unwind. 

llvm-svn: 131561
This commit is contained in:
Devang Patel 2011-05-18 20:01:18 +00:00
parent f4e832b14e
commit 0b373dca1f
1 changed files with 9 additions and 7 deletions
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16
llvm/lib/Transforms/Utils/SimplifyCFG.cpp
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@ -61,7 +61,7 @@ class SimplifyCFGOpt {
bool FoldValueComparisonIntoPredecessors(TerminatorInst *TI);
bool SimplifyReturn(ReturnInst *RI);
bool SimplifyUnwind(UnwindInst *UI);
bool SimplifyUnwind(UnwindInst *UI, IRBuilder<> &Builder);
bool SimplifyUnreachable(UnreachableInst *UI);
bool SimplifySwitch(SwitchInst *SI);
bool SimplifyIndirectBr(IndirectBrInst *IBI);
@ -2175,7 +2175,7 @@ bool SimplifyCFGOpt::SimplifyReturn(ReturnInst *RI) {
return false;
}
bool SimplifyCFGOpt::SimplifyUnwind(UnwindInst *UI) {
bool SimplifyCFGOpt::SimplifyUnwind(UnwindInst *UI, IRBuilder<> &Builder) {
// Check to see if the first instruction in this block is just an unwind.
// If so, replace any invoke instructions which use this as an exception
// destination with call instructions.
@ -2190,14 +2190,16 @@ bool SimplifyCFGOpt::SimplifyUnwind(UnwindInst *UI) {
if (II && II->getUnwindDest() == BB) {
// Insert a new branch instruction before the invoke, because this
// is now a fall through.
BranchInst *BI = BranchInst::Create(II->getNormalDest(), II);
Builder.SetInsertPoint(II);
BranchInst *BI = Builder.CreateBr(II->getNormalDest());
Pred->getInstList().remove(II); // Take out of symbol table
// Insert the call now.
SmallVector<Value*,8> Args(II->op_begin(), II->op_end()-3);
CallInst *CI = CallInst::Create(II->getCalledValue(),
Args.begin(), Args.end(),
II->getName(), BI);
Builder.SetInsertPoint(BI);
CallInst *CI = Builder.CreateCall(II->getCalledValue(),
Args.begin(), Args.end(),
II->getName());
CI->setCallingConv(II->getCallingConv());
CI->setAttributes(II->getAttributes());
// If the invoke produced a value, the Call now does instead.
@ -2671,7 +2673,7 @@ bool SimplifyCFGOpt::run(BasicBlock *BB) {
dyn_cast<UnreachableInst>(BB->getTerminator())) {
if (SimplifyUnreachable(UI)) return true;
} else if (UnwindInst *UI = dyn_cast<UnwindInst>(BB->getTerminator())) {
if (SimplifyUnwind(UI)) return true;
if (SimplifyUnwind(UI, Builder)) return true;
} else if (IndirectBrInst *IBI =
dyn_cast<IndirectBrInst>(BB->getTerminator())) {
if (SimplifyIndirectBr(IBI)) return true;