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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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41
lib/Transforms/Scalar/SCCP.cpp
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@@ -384,7 +384,6 @@ private:
void visitTerminatorInst(TerminatorInst &TI);
void visitCastInst(CastInst &I);
void visitGetResultInst(GetResultInst &GRI);
void visitSelectInst(SelectInst &I);
void visitBinaryOperator(Instruction &I);
void visitCmpInst(CmpInst &I);
@@ -669,41 +668,6 @@ void SCCPSolver::visitCastInst(CastInst &I) {
VState.getConstant(), I.getType()));
}
void SCCPSolver::visitGetResultInst(GetResultInst &GRI) {
Value *Aggr = GRI.getOperand(0);
// If the operand to the getresult is an undef, the result is undef.
if (isa<UndefValue>(Aggr))
return;
Function *F;
if (CallInst *CI = dyn_cast<CallInst>(Aggr))
F = CI->getCalledFunction();
else
F = cast<InvokeInst>(Aggr)->getCalledFunction();
// TODO: If IPSCCP resolves the callee of this function, we could propagate a
// result back!
if (F == 0 || TrackedMultipleRetVals.empty()) {
markOverdefined(&GRI);
return;
}
// See if we are tracking the result of the callee.
std::map<std::pair<Function*, unsigned>, LatticeVal>::iterator
It = TrackedMultipleRetVals.find(std::make_pair(F, GRI.getIndex()));
// If not tracking this function (for example, it is a declaration) just move
// to overdefined.
if (It == TrackedMultipleRetVals.end()) {
markOverdefined(&GRI);
return;
}
// Otherwise, the value will be merged in here as a result of CallSite
// handling.
}
void SCCPSolver::visitExtractValueInst(ExtractValueInst &EVI) {
Value *Aggr = EVI.getAggregateOperand();
@@ -1267,11 +1231,6 @@ CallOverdefined:
// currently handled conservatively.
for (Value::use_iterator UI = I->use_begin(), E = I->use_end();
UI != E; ++UI) {
if (GetResultInst *GRI = dyn_cast<GetResultInst>(*UI)) {
mergeInValue(GRI,
TrackedMultipleRetVals[std::make_pair(F, GRI->getIndex())]);
continue;
}
if (ExtractValueInst *EVI = dyn_cast<ExtractValueInst>(*UI)) {
if (EVI->getNumIndices() == 1) {
mergeInValue(EVI,