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Minor cleanups and simplifications

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10127 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner
2003-11-21 16:52:05 +00:00
parent 2436eda94a
commit 108e4ab159
7 changed files with 37 additions and 45 deletions
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14
lib/Transforms/Utils/UnifyFunctionExitNodes.cpp
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@ -21,13 +21,12 @@
#include "llvm/iTerminators.h"
#include "llvm/iPHINode.h"
#include "llvm/Type.h"
namespace llvm {
using namespace llvm;
static RegisterOpt<UnifyFunctionExitNodes>
X("mergereturn", "Unify function exit nodes");
Pass *createUnifyFunctionExitNodesPass() {
Pass *llvm::createUnifyFunctionExitNodesPass() {
return new UnifyFunctionExitNodes();
}
@ -91,11 +90,8 @@ bool UnifyFunctionExitNodes::runOnFunction(Function &F) {
// If the function doesn't return void... add a PHI node to the block...
PN = new PHINode(F.getReturnType(), "UnifiedRetVal");
NewRetBlock->getInstList().push_back(PN);
new ReturnInst(PN, NewRetBlock);
} else {
// If it returns void, just add a return void instruction to the block
new ReturnInst(0, NewRetBlock);
}
new ReturnInst(PN, NewRetBlock);
// Loop over all of the blocks, replacing the return instruction with an
// unconditional branch.
@ -109,10 +105,8 @@ bool UnifyFunctionExitNodes::runOnFunction(Function &F) {
if (PN) PN->addIncoming(BB->getTerminator()->getOperand(0), BB);
BB->getInstList().pop_back(); // Remove the return insn
new BranchInst(NewRetBlock, 0, 0, BB);
new BranchInst(NewRetBlock, BB);
}
ReturnBlock = NewRetBlock;
return true;
}
} // End llvm namespace