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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@2777 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner
2002-06-25 16:12:52 +00:00
parent a2204e1ff2
commit 18961504fc
43 changed files with 650 additions and 682 deletions
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lib/Transforms/Utils/UnifyFunctionExitNodes.cpp
+8 -8
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@@ -24,14 +24,14 @@ AnalysisID UnifyFunctionExitNodes::ID(AnalysisID::create<UnifyFunctionExitNodes>
//
// If there are no return stmts in the Function, a null pointer is returned.
//
bool UnifyFunctionExitNodes::runOnFunction(Function *M) {
bool UnifyFunctionExitNodes::runOnFunction(Function &F) {
// Loop over all of the blocks in a function, tracking all of the blocks that
// return.
//
vector<BasicBlock*> ReturningBlocks;
for(Function::iterator I = M->begin(), E = M->end(); I != E; ++I)
if (isa<ReturnInst>((*I)->getTerminator()))
ReturningBlocks.push_back(*I);
for(Function::iterator I = F.begin(), E = F.end(); I != E; ++I)
if (isa<ReturnInst>(I->getTerminator()))
ReturningBlocks.push_back(I);
if (ReturningBlocks.empty()) {
ExitNode = 0;
@@ -45,11 +45,11 @@ bool UnifyFunctionExitNodes::runOnFunction(Function *M) {
// node (if the function returns a value), and convert all of the return
// instructions into unconditional branches.
//
BasicBlock *NewRetBlock = new BasicBlock("UnifiedExitNode", M);
BasicBlock *NewRetBlock = new BasicBlock("UnifiedExitNode", &F);
if (M->getReturnType() != Type::VoidTy) {
if (F.getReturnType() != Type::VoidTy) {
// If the function doesn't return void... add a PHI node to the block...
PHINode *PN = new PHINode(M->getReturnType(), "UnifiedRetVal");
PHINode *PN = new PHINode(F.getReturnType(), "UnifiedRetVal");
NewRetBlock->getInstList().push_back(PN);
// Add an incoming element to the PHI node for every return instruction that
@@ -70,7 +70,7 @@ bool UnifyFunctionExitNodes::runOnFunction(Function *M) {
//
for (vector<BasicBlock*>::iterator I = ReturningBlocks.begin(),
E = ReturningBlocks.end(); I != E; ++I) {
delete (*I)->getInstList().pop_back(); // Remove the return insn
(*I)->getInstList().pop_back(); // Remove the return insn
(*I)->getInstList().push_back(new BranchInst(NewRetBlock));
}
ExitNode = NewRetBlock;