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Enable first-class aggregates support.

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Remove the GetResultInst instruction. It is still accepted in LLVM assembly
and bitcode, where it is now auto-upgraded to ExtractValueInst. Also, remove
support for return instructions with multiple values. These are auto-upgraded
to use InsertValueInst instructions.

The IRBuilder still accepts multiple-value returns, and auto-upgrades them
to InsertValueInst instructions.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53941 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman
2008-07-23 00:34:11 +00:00
parent 5e6ebaf4d1
commit fc74abfba5
29 changed files with 167 additions and 558 deletions
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24
lib/Transforms/IPO/StructRetPromotion.cpp
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@ -97,9 +97,6 @@ bool SRETPromotion::PromoteReturn(CallGraphNode *CGN) {
dyn_cast<StructType>(FArgType->getElementType());
assert (STy && "Invalid sret parameter element type");
if (nestedStructType(STy))
return false;
// Check if it is ok to perform this promotion.
if (isSafeToUpdateAllCallers(F) == false) {
NumRejectedSRETUses++;
@ -114,25 +111,13 @@ bool SRETPromotion::PromoteReturn(CallGraphNode *CGN) {
NFirstArg->replaceAllUsesWith(TheAlloca);
// [2] Find and replace ret instructions
SmallVector<Value *,4> RetVals;
for (Function::iterator FI = F->begin(), FE = F->end(); FI != FE; ++FI)
for(BasicBlock::iterator BI = FI->begin(), BE = FI->end(); BI != BE; ) {
Instruction *I = BI;
++BI;
if (isa<ReturnInst>(I)) {
RetVals.clear();
for (unsigned idx = 0; idx < STy->getNumElements(); ++idx) {
SmallVector<Value*, 2> GEPIdx;
GEPIdx.push_back(ConstantInt::get(Type::Int32Ty, 0));
GEPIdx.push_back(ConstantInt::get(Type::Int32Ty, idx));
Value *NGEPI = GetElementPtrInst::Create(TheAlloca, GEPIdx.begin(),
GEPIdx.end(),
"mrv.gep", I);
Value *NV = new LoadInst(NGEPI, "mrv.ld", I);
RetVals.push_back(NV);
}
ReturnInst *NR = ReturnInst::Create(&RetVals[0], RetVals.size(), I);
Value *NV = new LoadInst(TheAlloca, "mrv.ld", I);
ReturnInst *NR = ReturnInst::Create(NV);
I->replaceAllUsesWith(NR);
I->eraseFromParent();
}
@ -315,7 +300,7 @@ void SRETPromotion::updateCallSites(Function *F, Function *NF) {
ArgAttrsVec.clear();
New->takeName(Call);
// Update all users of sret parameter to extract value using getresult.
// Update all users of sret parameter to extract value using extractvalue.
for (Value::use_iterator UI = FirstCArg->use_begin(),
UE = FirstCArg->use_end(); UI != UE; ) {
User *U2 = *UI++;
@ -325,7 +310,8 @@ void SRETPromotion::updateCallSites(Function *F, Function *NF) {
else if (GetElementPtrInst *UGEP = dyn_cast<GetElementPtrInst>(U2)) {
ConstantInt *Idx = dyn_cast<ConstantInt>(UGEP->getOperand(2));
assert (Idx && "Unexpected getelementptr index!");
Value *GR = new GetResultInst(New, Idx->getZExtValue(), "gr", UGEP);
Value *GR = ExtractValueInst::Create(New, Idx->getZExtValue(),
"evi", UGEP);
for (Value::use_iterator GI = UGEP->use_begin(),
GE = UGEP->use_end(); GI != GE; ++GI) {
if (LoadInst *L = dyn_cast<LoadInst>(*GI)) {