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Teach InlineFunction how to differentiate between multiple-value

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return statements and aggregate returns so that it handles both
correctly.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52519 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman 2008-06-20 01:03:44 +00:00
parent 88d11c03cd
commit 2c31750cd0
1 changed files with 10 additions and 2 deletions
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12
lib/Transforms/Utils/InlineFunction.cpp
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@ -443,8 +443,9 @@ bool llvm::InlineFunction(CallSite CS, CallGraph *CG, const TargetData *TD) {
// uses of the returned value.
if (!TheCall->use_empty()) {
ReturnInst *R = Returns[0];
if (isa<StructType>(TheCall->getType())) {
// Multiple return values.
if (isa<StructType>(TheCall->getType()) &&
TheCall->getType() != R->getOperand(0)->getType()) {
// Multiple-value return statements.
while (!TheCall->use_empty()) {
GetResultInst *GR = cast<GetResultInst>(TheCall->use_back());
Value *RV = R->getOperand(GR->getIndex());
@ -509,6 +510,13 @@ bool llvm::InlineFunction(CallSite CS, CallGraph *CG, const TargetData *TD) {
// any users of the original call/invoke instruction.
const Type *RTy = CalledFunc->getReturnType();
const StructType *STy = dyn_cast<StructType>(RTy);
// We do special handling for multiple-value return statements. If this is
// a plain aggregate return, don't do the special handling.
if (!Returns.empty() && Returns[0]->getNumOperands() != 0 &&
Returns[0]->getOperand(0)->getType() == STy)
STy = 0;
if (Returns.size() > 1 || STy) {
// The PHI node should go at the front of the new basic block to merge all
// possible incoming values.