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Change getCopyToParts and getCopyFromParts to always use target-endian 

register ordering, for both physical and virtual registers. Update the PPC
target lowering for calls to expect registers for the call result to
already be in target order.

llvm-svn: 38471
This commit is contained in:
Dan Gohman 2007-07-09 20:59:04 +00:00
parent 3364abbb36
commit f8f531bf69
3 changed files with 33 additions and 32 deletions
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48
llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
View File

@ -621,7 +621,6 @@ static SDOperand getCopyFromParts(SelectionDAG &DAG,
unsigned NumParts,
MVT::ValueType PartVT,
MVT::ValueType ValueVT,
bool EndianOrder,
ISD::NodeType AssertOp = ISD::DELETED_NODE) {
if (!MVT::isVector(ValueVT) || NumParts == 1) {
SDOperand Val = Parts[0];
@ -631,7 +630,7 @@ static SDOperand getCopyFromParts(SelectionDAG &DAG,
assert(NumParts == 2 &&
"Cannot expand to more than 2 elts yet!");
SDOperand Hi = Parts[1];
if (EndianOrder && !DAG.getTargetLoweringInfo().isLittleEndian())
if (!DAG.getTargetLoweringInfo().isLittleEndian())
std::swap(Val, Hi);
return DAG.getNode(ISD::BUILD_PAIR, ValueVT, Val, Hi);
}
@ -692,7 +691,7 @@ static SDOperand getCopyFromParts(SelectionDAG &DAG,
// as appropriate.
for (unsigned i = 0; i != NumParts; ++i)
Ops[i] = getCopyFromParts(DAG, &Parts[i], 1,
PartVT, IntermediateVT, EndianOrder);
PartVT, IntermediateVT);
} else if (NumParts > 0) {
// If the intermediate type was expanded, build the intermediate operands
// from the parts.
@ -701,7 +700,7 @@ static SDOperand getCopyFromParts(SelectionDAG &DAG,
unsigned Factor = NumIntermediates / NumParts;
for (unsigned i = 0; i != NumIntermediates; ++i)
Ops[i] = getCopyFromParts(DAG, &Parts[i * Factor], Factor,
PartVT, IntermediateVT, EndianOrder);
PartVT, IntermediateVT);
}
// Build a vector with BUILD_VECTOR or CONCAT_VECTORS from the intermediate
@ -718,8 +717,7 @@ static void getCopyToParts(SelectionDAG &DAG,
SDOperand Val,
SDOperand *Parts,
unsigned NumParts,
MVT::ValueType PartVT,
bool EndianOrder) {
MVT::ValueType PartVT) {
MVT::ValueType ValueVT = Val.getValueType();
if (!MVT::isVector(ValueVT) || NumParts == 1) {
@ -728,7 +726,7 @@ static void getCopyToParts(SelectionDAG &DAG,
for (unsigned i = 0; i != NumParts; ++i)
Parts[i] = DAG.getNode(ISD::EXTRACT_ELEMENT, PartVT, Val,
DAG.getConstant(i, MVT::i32));
if (EndianOrder && !DAG.getTargetLoweringInfo().isLittleEndian())
if (!DAG.getTargetLoweringInfo().isLittleEndian())
std::reverse(Parts, Parts + NumParts);
return;
}
@ -789,7 +787,7 @@ static void getCopyToParts(SelectionDAG &DAG,
// If the register was not expanded, promote or copy the value,
// as appropriate.
for (unsigned i = 0; i != NumParts; ++i)
getCopyToParts(DAG, Ops[i], &Parts[i], 1, PartVT, EndianOrder);
getCopyToParts(DAG, Ops[i], &Parts[i], 1, PartVT);
} else if (NumParts > 0) {
// If the intermediate type was expanded, split each the value into
// legal parts.
@ -797,7 +795,7 @@ static void getCopyToParts(SelectionDAG &DAG,
"Must expand into a divisible number of parts!");
unsigned Factor = NumParts / NumIntermediates;
for (unsigned i = 0; i != NumIntermediates; ++i)
getCopyToParts(DAG, Ops[i], &Parts[i * Factor], Factor, PartVT, EndianOrder);
getCopyToParts(DAG, Ops[i], &Parts[i * Factor], Factor, PartVT);
}
}
@ -928,7 +926,7 @@ void SelectionDAGLowering::visitRet(ReturnInst &I) {
unsigned NumParts = TLI.getNumRegisters(VT);
MVT::ValueType PartVT = TLI.getRegisterType(VT);
SmallVector<SDOperand, 4> Parts(NumParts);
getCopyToParts(DAG, RetOp, &Parts[0], NumParts, PartVT, true);
getCopyToParts(DAG, RetOp, &Parts[0], NumParts, PartVT);
for (unsigned i = 0; i < NumParts; ++i) {
NewValues.push_back(Parts[i]);
NewValues.push_back(DAG.getConstant(false, MVT::i32));
@ -2952,11 +2950,6 @@ void SelectionDAGLowering::visitCall(CallInst &I) {
/// If the Flag pointer is NULL, no flag is used.
SDOperand RegsForValue::getCopyFromRegs(SelectionDAG &DAG,
SDOperand &Chain, SDOperand *Flag)const{
// Get the list of registers, in the appropriate order.
std::vector<unsigned> R(Regs);
if (!DAG.getTargetLoweringInfo().isLittleEndian())
std::reverse(R.begin(), R.end());
// Copy the legal parts from the registers.
unsigned NumParts = Regs.size();
SmallVector<SDOperand, 8> Parts(NumParts);
@ -2971,7 +2964,7 @@ SDOperand RegsForValue::getCopyFromRegs(SelectionDAG &DAG,
}
// Assemble the legal parts into the final value.
return getCopyFromParts(DAG, &Parts[0], NumParts, RegVT, ValueVT, false);
return getCopyFromParts(DAG, &Parts[0], NumParts, RegVT, ValueVT);
}
/// getCopyToRegs - Emit a series of CopyToReg nodes that copies the
@ -2980,21 +2973,16 @@ SDOperand RegsForValue::getCopyFromRegs(SelectionDAG &DAG,
/// If the Flag pointer is NULL, no flag is used.
void RegsForValue::getCopyToRegs(SDOperand Val, SelectionDAG &DAG,
SDOperand &Chain, SDOperand *Flag) const {
// Get the list of registers, in the appropriate order.
std::vector<unsigned> R(Regs);
if (!DAG.getTargetLoweringInfo().isLittleEndian())
std::reverse(R.begin(), R.end());
// Get the list of the values's legal parts.
unsigned NumParts = Regs.size();
SmallVector<SDOperand, 8> Parts(NumParts);
getCopyToParts(DAG, Val, &Parts[0], NumParts, RegVT, false);
getCopyToParts(DAG, Val, &Parts[0], NumParts, RegVT);
// Copy the parts into the registers.
for (unsigned i = 0; i != NumParts; ++i) {
SDOperand Part = Flag ?
DAG.getCopyToReg(Chain, R[i], Parts[i], *Flag) :
DAG.getCopyToReg(Chain, R[i], Parts[i]);
DAG.getCopyToReg(Chain, Regs[i], Parts[i], *Flag) :
DAG.getCopyToReg(Chain, Regs[i], Parts[i]);
Chain = Part.getValue(0);
if (Flag)
*Flag = Part.getValue(1);
@ -3867,7 +3855,7 @@ TargetLowering::LowerArguments(Function &F, SelectionDAG &DAG) {
SmallVector<SDOperand, 4> Parts(NumParts);
for (unsigned j = 0; j != NumParts; ++j)
Parts[j] = SDOperand(Result, i++);
Ops.push_back(getCopyFromParts(DAG, &Parts[0], NumParts, PartVT, VT, true));
Ops.push_back(getCopyFromParts(DAG, &Parts[0], NumParts, PartVT, VT));
break;
}
}
@ -3939,7 +3927,7 @@ TargetLowering::LowerCallTo(SDOperand Chain, const Type *RetTy,
MVT::ValueType PartVT = getRegisterType(VT);
unsigned NumParts = getNumRegisters(VT);
SmallVector<SDOperand, 4> Parts(NumParts);
getCopyToParts(DAG, Op, &Parts[0], NumParts, PartVT, true);
getCopyToParts(DAG, Op, &Parts[0], NumParts, PartVT);
for (unsigned i = 0; i != NumParts; ++i) {
// if it isn't first piece, alignment must be 1
unsigned MyFlags = Flags;
@ -3979,7 +3967,7 @@ TargetLowering::LowerCallTo(SDOperand Chain, const Type *RetTy,
SmallVector<SDOperand, 4> Results(NumRegs);
for (unsigned i = 0; i != NumRegs; ++i)
Results[i] = Res.getValue(i);
Res = getCopyFromParts(DAG, &Results[0], NumRegs, RegisterVT, VT, false, AssertOp);
Res = getCopyFromParts(DAG, &Results[0], NumRegs, RegisterVT, VT, AssertOp);
}
return std::make_pair(Res, Chain);
@ -4269,7 +4257,7 @@ SDOperand SelectionDAGLowering::CopyValueToVirtualRegister(Value *V,
SmallVector<SDOperand, 8> Chains(NumRegs);
// Copy the value by legal parts into sequential virtual registers.
getCopyToParts(DAG, Op, &Regs[0], NumRegs, RegisterVT, false);
getCopyToParts(DAG, Op, &Regs[0], NumRegs, RegisterVT);
for (unsigned i = 0; i != NumRegs; ++i)
Chains[i] = DAG.getCopyToReg(getRoot(), Reg + i, Regs[i]);
return DAG.getNode(ISD::TokenFactor, MVT::Other, &Chains[0], NumRegs);
@ -4406,8 +4394,8 @@ void SelectionDAGISel::BuildSelectionDAG(SelectionDAG &DAG, BasicBlock *LLVMBB,
if (TI->getNumSuccessors())
SuccsHandled.resize(BB->getParent()->getNumBlockIDs());
// Check successor nodes PHI nodes that expect a constant to be available from
// this block.
// Check successor nodes' PHI nodes that expect a constant to be available
// from this block.
for (unsigned succ = 0, e = TI->getNumSuccessors(); succ != e; ++succ) {
BasicBlock *SuccBB = TI->getSuccessor(succ);
if (!isa<PHINode>(SuccBB->begin())) continue;

4
llvm/lib/Target/PowerPC/PPCISelLowering.cpp
View File

@ -1774,9 +1774,9 @@ static SDOperand LowerCALL(SDOperand Op, SelectionDAG &DAG,
case MVT::Other: break;
case MVT::i32:
if (Op.Val->getValueType(1) == MVT::i32) {
Chain = DAG.getCopyFromReg(Chain, PPC::R4, MVT::i32, InFlag).getValue(1);
Chain = DAG.getCopyFromReg(Chain, PPC::R3, MVT::i32, InFlag).getValue(1);
ResultVals[0] = Chain.getValue(0);
Chain = DAG.getCopyFromReg(Chain, PPC::R3, MVT::i32,
Chain = DAG.getCopyFromReg(Chain, PPC::R4, MVT::i32,
Chain.getValue(2)).getValue(1);
ResultVals[1] = Chain.getValue(0);
NumResults = 2;

13
llvm/test/CodeGen/PowerPC/big-endian-call-result.ll Normal file
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@ -0,0 +1,13 @@
; RUN: llvm-as < %s | llc -march=ppc32 -mtriple=powerpc-unknown-linux-gnu | \
; RUN: grep {addic 4, 4, 1}
; RUN: llvm-as < %s | llc -march=ppc32 -mtriple=powerpc-unknown-linux-gnu | \
; RUN: grep {addze 3, 3}
declare i64 @foo();
define i64 @bar()
{
%t = call i64 @foo()
%s = add i64 %t, 1
ret i64 %s
}