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Don't insert a PHI node to merge "returns" from an inlined function if there 

is only a single return from the function!

llvm-svn: 3878
This commit is contained in:
Chris Lattner 2002-09-22 18:41:25 +00:00
parent a8ce09e2de
commit facc751260
1 changed files with 12 additions and 1 deletions
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13
llvm/lib/Transforms/IPO/InlineSimple.cpp
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@ -190,7 +190,18 @@ bool InlineFunction(CallInst *CI) {
RemapInstruction(II, ValueMap);
}
if (PHI) RemapInstruction(PHI, ValueMap); // Fix the PHI node also...
if (PHI) {
RemapInstruction(PHI, ValueMap); // Fix the PHI node also...
// Check to see if the PHI node only has one argument. This is a common
// case resulting from there only being a single return instruction in the
// function call. Because this is so common, eliminate the PHI node.
//
if (PHI->getNumIncomingValues() == 1) {
PHI->replaceAllUsesWith(PHI->getIncomingValue(0));
PHI->getParent()->getInstList().erase(PHI);
}
}
// Change the branch that used to go to NewBB to branch to the first basic
// block of the inlined function.