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[unwind removal] We no longer have 'unwind' instructions being generated, so

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remove the code that handles them.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@149901 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Bill Wendling
2012-02-06 21:16:41 +00:00
parent 0f96817d01
commit aa5abe88d6
11 changed files with 9 additions and 134 deletions
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20
lib/Transforms/Utils/UnifyFunctionExitNodes.cpp
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@@ -50,33 +50,13 @@ bool UnifyFunctionExitNodes::runOnFunction(Function &F) {
// return.
//
std::vector<BasicBlock*> ReturningBlocks;
std::vector<BasicBlock*> UnwindingBlocks;
std::vector<BasicBlock*> UnreachableBlocks;
for(Function::iterator I = F.begin(), E = F.end(); I != E; ++I)
if (isa<ReturnInst>(I->getTerminator()))
ReturningBlocks.push_back(I);
else if (isa<UnwindInst>(I->getTerminator()))
UnwindingBlocks.push_back(I);
else if (isa<UnreachableInst>(I->getTerminator()))
UnreachableBlocks.push_back(I);
// Handle unwinding blocks first.
if (UnwindingBlocks.empty()) {
UnwindBlock = 0;
} else if (UnwindingBlocks.size() == 1) {
UnwindBlock = UnwindingBlocks.front();
} else {
UnwindBlock = BasicBlock::Create(F.getContext(), "UnifiedUnwindBlock", &F);
new UnwindInst(F.getContext(), UnwindBlock);
for (std::vector<BasicBlock*>::iterator I = UnwindingBlocks.begin(),
E = UnwindingBlocks.end(); I != E; ++I) {
BasicBlock *BB = *I;
BB->getInstList().pop_back(); // Remove the unwind insn
BranchInst::Create(UnwindBlock, BB);
}
}
// Then unreachable blocks.
if (UnreachableBlocks.empty()) {
UnreachableBlock = 0;