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implement returns of a vector, testcase here: CodeGen/X86/vec_return.ll

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27767 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2006-04-17 20:32:50 +00:00
parent bddea0561b
commit b2be4032c5
1 changed files with 27 additions and 23 deletions
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50
lib/Target/X86/X86ISelLowering.cpp
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@ -449,26 +449,6 @@ X86TargetLowering::LowerCCCArguments(Function &F, SelectionDAG &DAG) {
ReturnAddrIndex = 0; // No return address slot generated yet.
BytesToPopOnReturn = 0; // Callee pops nothing.
BytesCallerReserves = ArgOffset;
// Finally, inform the code generator which regs we return values in.
switch (getValueType(F.getReturnType())) {
default: assert(0 && "Unknown type!");
case MVT::isVoid: break;
case MVT::i1:
case MVT::i8:
case MVT::i16:
case MVT::i32:
MF.addLiveOut(X86::EAX);
break;
case MVT::i64:
MF.addLiveOut(X86::EAX);
MF.addLiveOut(X86::EDX);
break;
case MVT::f32:
case MVT::f64:
MF.addLiveOut(X86::ST0);
break;
}
return ArgValues;
}
@ -2676,15 +2656,30 @@ SDOperand X86TargetLowering::LowerOperation(SDOperand Op, SelectionDAG &DAG) {
default:
assert(0 && "Do not know how to return this many arguments!");
abort();
case 1:
case 1: // ret void.
return DAG.getNode(X86ISD::RET_FLAG, MVT::Other, Op.getOperand(0),
DAG.getConstant(getBytesToPopOnReturn(), MVT::i16));
case 2: {
MVT::ValueType ArgVT = Op.getOperand(1).getValueType();
if (MVT::isInteger(ArgVT))
if (MVT::isVector(ArgVT)) {
// Integer or FP vector result -> XMM0.
if (DAG.getMachineFunction().liveout_empty())
DAG.getMachineFunction().addLiveOut(X86::XMM0);
Copy = DAG.getCopyToReg(Op.getOperand(0), X86::XMM0, Op.getOperand(1),
SDOperand());
} else if (MVT::isInteger(ArgVT)) {
// Integer result -> EAX
if (DAG.getMachineFunction().liveout_empty())
DAG.getMachineFunction().addLiveOut(X86::EAX);
Copy = DAG.getCopyToReg(Op.getOperand(0), X86::EAX, Op.getOperand(1),
SDOperand());
else if (!X86ScalarSSE) {
} else if (!X86ScalarSSE) {
// FP return with fp-stack value.
if (DAG.getMachineFunction().liveout_empty())
DAG.getMachineFunction().addLiveOut(X86::ST0);
std::vector<MVT::ValueType> Tys;
Tys.push_back(MVT::Other);
Tys.push_back(MVT::Flag);
@ -2693,6 +2688,10 @@ SDOperand X86TargetLowering::LowerOperation(SDOperand Op, SelectionDAG &DAG) {
Ops.push_back(Op.getOperand(1));
Copy = DAG.getNode(X86ISD::FP_SET_RESULT, Tys, Ops);
} else {
// FP return with ScalarSSE (return on fp-stack).
if (DAG.getMachineFunction().liveout_empty())
DAG.getMachineFunction().addLiveOut(X86::ST0);
SDOperand MemLoc;
SDOperand Chain = Op.getOperand(0);
SDOperand Value = Op.getOperand(1);
@ -2729,6 +2728,11 @@ SDOperand X86TargetLowering::LowerOperation(SDOperand Op, SelectionDAG &DAG) {
break;
}
case 3:
if (DAG.getMachineFunction().liveout_empty()) {
DAG.getMachineFunction().addLiveOut(X86::EAX);
DAG.getMachineFunction().addLiveOut(X86::EDX);
}
Copy = DAG.getCopyToReg(Op.getOperand(0), X86::EDX, Op.getOperand(2),
SDOperand());
Copy = DAG.getCopyToReg(Copy, X86::EAX,Op.getOperand(1),Copy.getValue(1));