mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2025-03-21 03:32:29 +00:00
R600: Move fabs/fneg/sel folding logic into PostProcessIsel
This move makes possible to correctly handle multiples instructions from a single pattern. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@190643 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Vincent Lejeune
parent
a2c982129e
commit
fe78318614
lib/Target/R600
test/CodeGen/R600
@ -201,92 +201,6 @@ SDNode *AMDGPUDAGToDAGISel::Select(SDNode *N) {
|
||||
}
|
||||
switch (Opc) {
|
||||
default: break;
|
||||
case AMDGPUISD::CONST_ADDRESS: {
|
||||
for (SDNode::use_iterator I = N->use_begin(), Next = llvm::next(I);
|
||||
I != SDNode::use_end(); I = Next) {
|
||||
Next = llvm::next(I);
|
||||
if (!I->isMachineOpcode()) {
|
||||
continue;
|
||||
}
|
||||
unsigned Opcode = I->getMachineOpcode();
|
||||
bool HasDst = TII->getOperandIdx(Opcode, AMDGPU::OpName::dst) > -1;
|
||||
int SrcIdx = I.getOperandNo();
|
||||
int SelIdx;
|
||||
// Unlike MachineInstrs, SDNodes do not have results in their operand
|
||||
// list, so we need to increment the SrcIdx, since
|
||||
// R600InstrInfo::getOperandIdx is based on the MachineInstr indices.
|
||||
if (HasDst) {
|
||||
SrcIdx++;
|
||||
}
|
||||
|
||||
SelIdx = TII->getSelIdx(I->getMachineOpcode(), SrcIdx);
|
||||
if (SelIdx < 0) {
|
||||
continue;
|
||||
}
|
||||
|
||||
SDValue CstOffset;
|
||||
if (N->getValueType(0).isVector() ||
|
||||
!SelectGlobalValueConstantOffset(N->getOperand(0), CstOffset))
|
||||
continue;
|
||||
|
||||
// Gather constants values
|
||||
int SrcIndices[] = {
|
||||
TII->getOperandIdx(Opcode, AMDGPU::OpName::src0),
|
||||
TII->getOperandIdx(Opcode, AMDGPU::OpName::src1),
|
||||
TII->getOperandIdx(Opcode, AMDGPU::OpName::src2),
|
||||
TII->getOperandIdx(Opcode, AMDGPU::OpName::src0_X),
|
||||
TII->getOperandIdx(Opcode, AMDGPU::OpName::src0_Y),
|
||||
TII->getOperandIdx(Opcode, AMDGPU::OpName::src0_Z),
|
||||
TII->getOperandIdx(Opcode, AMDGPU::OpName::src0_W),
|
||||
TII->getOperandIdx(Opcode, AMDGPU::OpName::src1_X),
|
||||
TII->getOperandIdx(Opcode, AMDGPU::OpName::src1_Y),
|
||||
TII->getOperandIdx(Opcode, AMDGPU::OpName::src1_Z),
|
||||
TII->getOperandIdx(Opcode, AMDGPU::OpName::src1_W)
|
||||
};
|
||||
std::vector<unsigned> Consts;
|
||||
for (unsigned i = 0; i < sizeof(SrcIndices) / sizeof(int); i++) {
|
||||
int OtherSrcIdx = SrcIndices[i];
|
||||
int OtherSelIdx = TII->getSelIdx(Opcode, OtherSrcIdx);
|
||||
if (OtherSrcIdx < 0 || OtherSelIdx < 0) {
|
||||
continue;
|
||||
}
|
||||
if (HasDst) {
|
||||
OtherSrcIdx--;
|
||||
OtherSelIdx--;
|
||||
}
|
||||
if (RegisterSDNode *Reg =
|
||||
dyn_cast<RegisterSDNode>(I->getOperand(OtherSrcIdx))) {
|
||||
if (Reg->getReg() == AMDGPU::ALU_CONST) {
|
||||
ConstantSDNode *Cst = dyn_cast<ConstantSDNode>(I->getOperand(OtherSelIdx));
|
||||
Consts.push_back(Cst->getZExtValue());
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
ConstantSDNode *Cst = dyn_cast<ConstantSDNode>(CstOffset);
|
||||
Consts.push_back(Cst->getZExtValue());
|
||||
if (!TII->fitsConstReadLimitations(Consts))
|
||||
continue;
|
||||
|
||||
// Convert back to SDNode indices
|
||||
if (HasDst) {
|
||||
SrcIdx--;
|
||||
SelIdx--;
|
||||
}
|
||||
std::vector<SDValue> Ops;
|
||||
for (int i = 0, e = I->getNumOperands(); i != e; ++i) {
|
||||
if (i == SrcIdx) {
|
||||
Ops.push_back(CurDAG->getRegister(AMDGPU::ALU_CONST, MVT::f32));
|
||||
} else if (i == SelIdx) {
|
||||
Ops.push_back(CstOffset);
|
||||
} else {
|
||||
Ops.push_back(I->getOperand(i));
|
||||
}
|
||||
}
|
||||
CurDAG->UpdateNodeOperands(*I, Ops.data(), Ops.size());
|
||||
}
|
||||
break;
|
||||
}
|
||||
case ISD::BUILD_VECTOR: {
|
||||
unsigned RegClassID;
|
||||
const AMDGPUSubtarget &ST = TM.getSubtarget<AMDGPUSubtarget>();
|
||||
@ -508,38 +422,9 @@ SDNode *AMDGPUDAGToDAGISel::Select(SDNode *N) {
|
||||
if (ST.getGeneration() <= AMDGPUSubtarget::NORTHERN_ISLANDS) {
|
||||
const R600InstrInfo *TII =
|
||||
static_cast<const R600InstrInfo*>(TM.getInstrInfo());
|
||||
if (Result && Result->isMachineOpcode() && Result->getMachineOpcode() == AMDGPU::DOT_4) {
|
||||
bool IsModified = false;
|
||||
do {
|
||||
std::vector<SDValue> Ops;
|
||||
for(SDNode::op_iterator I = Result->op_begin(), E = Result->op_end();
|
||||
I != E; ++I)
|
||||
Ops.push_back(*I);
|
||||
IsModified = FoldDotOperands(Result->getMachineOpcode(), TII, Ops);
|
||||
if (IsModified) {
|
||||
Result = CurDAG->UpdateNodeOperands(Result, Ops.data(), Ops.size());
|
||||
}
|
||||
} while (IsModified);
|
||||
|
||||
}
|
||||
if (Result && Result->isMachineOpcode() &&
|
||||
!(TII->get(Result->getMachineOpcode()).TSFlags & R600_InstFlag::VECTOR)
|
||||
&& TII->hasInstrModifiers(Result->getMachineOpcode())) {
|
||||
// Fold FNEG/FABS
|
||||
// TODO: Isel can generate multiple MachineInst, we need to recursively
|
||||
// parse Result
|
||||
bool IsModified = false;
|
||||
do {
|
||||
std::vector<SDValue> Ops;
|
||||
for(SDNode::op_iterator I = Result->op_begin(), E = Result->op_end();
|
||||
I != E; ++I)
|
||||
Ops.push_back(*I);
|
||||
IsModified = FoldOperands(Result->getMachineOpcode(), TII, Ops);
|
||||
if (IsModified) {
|
||||
Result = CurDAG->UpdateNodeOperands(Result, Ops.data(), Ops.size());
|
||||
}
|
||||
} while (IsModified);
|
||||
|
||||
// If node has a single use which is CLAMP_R600, folds it
|
||||
if (Result->hasOneUse() && Result->isMachineOpcode()) {
|
||||
SDNode *PotentialClamp = *Result->use_begin();
|
||||
@ -564,120 +449,6 @@ SDNode *AMDGPUDAGToDAGISel::Select(SDNode *N) {
|
||||
return Result;
|
||||
}
|
||||
|
||||
bool AMDGPUDAGToDAGISel::FoldOperand(SDValue &Src, SDValue &Sel, SDValue &Neg,
|
||||
SDValue &Abs, const R600InstrInfo *TII) {
|
||||
switch (Src.getOpcode()) {
|
||||
case ISD::FNEG:
|
||||
Src = Src.getOperand(0);
|
||||
Neg = CurDAG->getTargetConstant(1, MVT::i32);
|
||||
return true;
|
||||
case ISD::FABS:
|
||||
if (!Abs.getNode())
|
||||
return false;
|
||||
Src = Src.getOperand(0);
|
||||
Abs = CurDAG->getTargetConstant(1, MVT::i32);
|
||||
return true;
|
||||
case ISD::BITCAST:
|
||||
Src = Src.getOperand(0);
|
||||
return true;
|
||||
default:
|
||||
return false;
|
||||
}
|
||||
}
|
||||
|
||||
bool AMDGPUDAGToDAGISel::FoldOperands(unsigned Opcode,
|
||||
const R600InstrInfo *TII, std::vector<SDValue> &Ops) {
|
||||
int OperandIdx[] = {
|
||||
TII->getOperandIdx(Opcode, AMDGPU::OpName::src0),
|
||||
TII->getOperandIdx(Opcode, AMDGPU::OpName::src1),
|
||||
TII->getOperandIdx(Opcode, AMDGPU::OpName::src2)
|
||||
};
|
||||
int SelIdx[] = {
|
||||
TII->getOperandIdx(Opcode, AMDGPU::OpName::src0_sel),
|
||||
TII->getOperandIdx(Opcode, AMDGPU::OpName::src1_sel),
|
||||
TII->getOperandIdx(Opcode, AMDGPU::OpName::src2_sel)
|
||||
};
|
||||
int NegIdx[] = {
|
||||
TII->getOperandIdx(Opcode, AMDGPU::OpName::src0_neg),
|
||||
TII->getOperandIdx(Opcode, AMDGPU::OpName::src1_neg),
|
||||
TII->getOperandIdx(Opcode, AMDGPU::OpName::src2_neg)
|
||||
};
|
||||
int AbsIdx[] = {
|
||||
TII->getOperandIdx(Opcode, AMDGPU::OpName::src0_abs),
|
||||
TII->getOperandIdx(Opcode, AMDGPU::OpName::src1_abs),
|
||||
-1
|
||||
};
|
||||
|
||||
|
||||
for (unsigned i = 0; i < 3; i++) {
|
||||
if (OperandIdx[i] < 0)
|
||||
return false;
|
||||
SDValue &Src = Ops[OperandIdx[i] - 1];
|
||||
SDValue &Sel = Ops[SelIdx[i] - 1];
|
||||
SDValue &Neg = Ops[NegIdx[i] - 1];
|
||||
SDValue FakeAbs;
|
||||
SDValue &Abs = (AbsIdx[i] > -1) ? Ops[AbsIdx[i] - 1] : FakeAbs;
|
||||
if (FoldOperand(Src, Sel, Neg, Abs, TII))
|
||||
return true;
|
||||
}
|
||||
return false;
|
||||
}
|
||||
|
||||
bool AMDGPUDAGToDAGISel::FoldDotOperands(unsigned Opcode,
|
||||
const R600InstrInfo *TII, std::vector<SDValue> &Ops) {
|
||||
int OperandIdx[] = {
|
||||
TII->getOperandIdx(Opcode, AMDGPU::OpName::src0_X),
|
||||
TII->getOperandIdx(Opcode, AMDGPU::OpName::src0_Y),
|
||||
TII->getOperandIdx(Opcode, AMDGPU::OpName::src0_Z),
|
||||
TII->getOperandIdx(Opcode, AMDGPU::OpName::src0_W),
|
||||
TII->getOperandIdx(Opcode, AMDGPU::OpName::src1_X),
|
||||
TII->getOperandIdx(Opcode, AMDGPU::OpName::src1_Y),
|
||||
TII->getOperandIdx(Opcode, AMDGPU::OpName::src1_Z),
|
||||
TII->getOperandIdx(Opcode, AMDGPU::OpName::src1_W)
|
||||
};
|
||||
int SelIdx[] = {
|
||||
TII->getOperandIdx(Opcode, AMDGPU::OpName::src0_sel_X),
|
||||
TII->getOperandIdx(Opcode, AMDGPU::OpName::src0_sel_Y),
|
||||
TII->getOperandIdx(Opcode, AMDGPU::OpName::src0_sel_Z),
|
||||
TII->getOperandIdx(Opcode, AMDGPU::OpName::src0_sel_W),
|
||||
TII->getOperandIdx(Opcode, AMDGPU::OpName::src1_sel_X),
|
||||
TII->getOperandIdx(Opcode, AMDGPU::OpName::src1_sel_Y),
|
||||
TII->getOperandIdx(Opcode, AMDGPU::OpName::src1_sel_Z),
|
||||
TII->getOperandIdx(Opcode, AMDGPU::OpName::src1_sel_W)
|
||||
};
|
||||
int NegIdx[] = {
|
||||
TII->getOperandIdx(Opcode, AMDGPU::OpName::src0_neg_X),
|
||||
TII->getOperandIdx(Opcode, AMDGPU::OpName::src0_neg_Y),
|
||||
TII->getOperandIdx(Opcode, AMDGPU::OpName::src0_neg_Z),
|
||||
TII->getOperandIdx(Opcode, AMDGPU::OpName::src0_neg_W),
|
||||
TII->getOperandIdx(Opcode, AMDGPU::OpName::src1_neg_X),
|
||||
TII->getOperandIdx(Opcode, AMDGPU::OpName::src1_neg_Y),
|
||||
TII->getOperandIdx(Opcode, AMDGPU::OpName::src1_neg_Z),
|
||||
TII->getOperandIdx(Opcode, AMDGPU::OpName::src1_neg_W)
|
||||
};
|
||||
int AbsIdx[] = {
|
||||
TII->getOperandIdx(Opcode, AMDGPU::OpName::src0_abs_X),
|
||||
TII->getOperandIdx(Opcode, AMDGPU::OpName::src0_abs_Y),
|
||||
TII->getOperandIdx(Opcode, AMDGPU::OpName::src0_abs_Z),
|
||||
TII->getOperandIdx(Opcode, AMDGPU::OpName::src0_abs_W),
|
||||
TII->getOperandIdx(Opcode, AMDGPU::OpName::src1_abs_X),
|
||||
TII->getOperandIdx(Opcode, AMDGPU::OpName::src1_abs_Y),
|
||||
TII->getOperandIdx(Opcode, AMDGPU::OpName::src1_abs_Z),
|
||||
TII->getOperandIdx(Opcode, AMDGPU::OpName::src1_abs_W)
|
||||
};
|
||||
|
||||
for (unsigned i = 0; i < 8; i++) {
|
||||
if (OperandIdx[i] < 0)
|
||||
return false;
|
||||
SDValue &Src = Ops[OperandIdx[i] - 1];
|
||||
SDValue &Sel = Ops[SelIdx[i] - 1];
|
||||
SDValue &Neg = Ops[NegIdx[i] - 1];
|
||||
SDValue &Abs = Ops[AbsIdx[i] - 1];
|
||||
if (FoldOperand(Src, Sel, Neg, Abs, TII))
|
||||
return true;
|
||||
}
|
||||
return false;
|
||||
}
|
||||
|
||||
bool AMDGPUDAGToDAGISel::checkType(const Value *ptr, unsigned int addrspace) {
|
||||
if (!ptr) {
|
||||
@ -890,26 +661,27 @@ bool AMDGPUDAGToDAGISel::SelectU24(SDValue Op, SDValue &U24) {
|
||||
}
|
||||
|
||||
void AMDGPUDAGToDAGISel::PostprocessISelDAG() {
|
||||
|
||||
if (Subtarget.getGeneration() < AMDGPUSubtarget::SOUTHERN_ISLANDS) {
|
||||
return;
|
||||
}
|
||||
|
||||
// Go over all selected nodes and try to fold them a bit more
|
||||
const AMDGPUTargetLowering& Lowering =
|
||||
(*(const AMDGPUTargetLowering*)getTargetLowering());
|
||||
for (SelectionDAG::allnodes_iterator I = CurDAG->allnodes_begin(),
|
||||
E = CurDAG->allnodes_end(); I != E; ++I) {
|
||||
bool IsModified = false;
|
||||
do {
|
||||
IsModified = false;
|
||||
// Go over all selected nodes and try to fold them a bit more
|
||||
for (SelectionDAG::allnodes_iterator I = CurDAG->allnodes_begin(),
|
||||
E = CurDAG->allnodes_end(); I != E; ++I) {
|
||||
|
||||
SDNode *Node = I;
|
||||
SDNode *Node = I;
|
||||
|
||||
MachineSDNode *MachineNode = dyn_cast<MachineSDNode>(I);
|
||||
if (!MachineNode)
|
||||
continue;
|
||||
MachineSDNode *MachineNode = dyn_cast<MachineSDNode>(I);
|
||||
if (!MachineNode)
|
||||
continue;
|
||||
|
||||
SDNode *ResNode = Lowering.PostISelFolding(MachineNode, *CurDAG);
|
||||
if (ResNode != Node) {
|
||||
ReplaceUses(Node, ResNode);
|
||||
SDNode *ResNode = Lowering.PostISelFolding(MachineNode, *CurDAG);
|
||||
if (ResNode != Node) {
|
||||
ReplaceUses(Node, ResNode);
|
||||
IsModified = true;
|
||||
}
|
||||
}
|
||||
}
|
||||
CurDAG->RemoveDeadNodes();
|
||||
} while (IsModified);
|
||||
}
|
||||
|
||||
@ -1629,3 +1629,182 @@ SDValue R600TargetLowering::PerformDAGCombine(SDNode *N,
|
||||
}
|
||||
return SDValue();
|
||||
}
|
||||
|
||||
static bool
|
||||
FoldOperand(SDNode *ParentNode, unsigned SrcIdx, SDValue &Src, SDValue &Neg,
|
||||
SDValue &Abs, SDValue &Sel, SelectionDAG &DAG) {
|
||||
const R600InstrInfo *TII =
|
||||
static_cast<const R600InstrInfo *>(DAG.getTarget().getInstrInfo());
|
||||
if (!Src.isMachineOpcode())
|
||||
return false;
|
||||
switch (Src.getMachineOpcode()) {
|
||||
case AMDGPU::FNEG_R600:
|
||||
if (!Neg.getNode())
|
||||
return false;
|
||||
Src = Src.getOperand(0);
|
||||
Neg = DAG.getTargetConstant(1, MVT::i32);
|
||||
return true;
|
||||
case AMDGPU::FABS_R600:
|
||||
if (!Abs.getNode())
|
||||
return false;
|
||||
Src = Src.getOperand(0);
|
||||
Abs = DAG.getTargetConstant(1, MVT::i32);
|
||||
return true;
|
||||
case AMDGPU::CONST_COPY: {
|
||||
unsigned Opcode = ParentNode->getMachineOpcode();
|
||||
bool HasDst = TII->getOperandIdx(Opcode, AMDGPU::OpName::dst) > -1;
|
||||
|
||||
if (!Sel.getNode())
|
||||
return false;
|
||||
|
||||
SDValue CstOffset = Src.getOperand(0);
|
||||
if (ParentNode->getValueType(0).isVector())
|
||||
return false;
|
||||
|
||||
// Gather constants values
|
||||
int SrcIndices[] = {
|
||||
TII->getOperandIdx(Opcode, AMDGPU::OpName::src0),
|
||||
TII->getOperandIdx(Opcode, AMDGPU::OpName::src1),
|
||||
TII->getOperandIdx(Opcode, AMDGPU::OpName::src2),
|
||||
TII->getOperandIdx(Opcode, AMDGPU::OpName::src0_X),
|
||||
TII->getOperandIdx(Opcode, AMDGPU::OpName::src0_Y),
|
||||
TII->getOperandIdx(Opcode, AMDGPU::OpName::src0_Z),
|
||||
TII->getOperandIdx(Opcode, AMDGPU::OpName::src0_W),
|
||||
TII->getOperandIdx(Opcode, AMDGPU::OpName::src1_X),
|
||||
TII->getOperandIdx(Opcode, AMDGPU::OpName::src1_Y),
|
||||
TII->getOperandIdx(Opcode, AMDGPU::OpName::src1_Z),
|
||||
TII->getOperandIdx(Opcode, AMDGPU::OpName::src1_W)
|
||||
};
|
||||
std::vector<unsigned> Consts;
|
||||
for (unsigned i = 0; i < sizeof(SrcIndices) / sizeof(int); i++) {
|
||||
int OtherSrcIdx = SrcIndices[i];
|
||||
int OtherSelIdx = TII->getSelIdx(Opcode, OtherSrcIdx);
|
||||
if (OtherSrcIdx < 0 || OtherSelIdx < 0)
|
||||
continue;
|
||||
if (HasDst) {
|
||||
OtherSrcIdx--;
|
||||
OtherSelIdx--;
|
||||
}
|
||||
if (RegisterSDNode *Reg =
|
||||
dyn_cast<RegisterSDNode>(ParentNode->getOperand(OtherSrcIdx))) {
|
||||
if (Reg->getReg() == AMDGPU::ALU_CONST) {
|
||||
ConstantSDNode *Cst = dyn_cast<ConstantSDNode>(
|
||||
ParentNode->getOperand(OtherSelIdx));
|
||||
Consts.push_back(Cst->getZExtValue());
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
ConstantSDNode *Cst = dyn_cast<ConstantSDNode>(CstOffset);
|
||||
Consts.push_back(Cst->getZExtValue());
|
||||
if (!TII->fitsConstReadLimitations(Consts)) {
|
||||
return false;
|
||||
}
|
||||
|
||||
Sel = CstOffset;
|
||||
Src = DAG.getRegister(AMDGPU::ALU_CONST, MVT::f32);
|
||||
return true;
|
||||
}
|
||||
default:
|
||||
return false;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
/// \brief Fold the instructions after selecting them
|
||||
SDNode *R600TargetLowering::PostISelFolding(MachineSDNode *Node,
|
||||
SelectionDAG &DAG) const {
|
||||
const R600InstrInfo *TII =
|
||||
static_cast<const R600InstrInfo *>(DAG.getTarget().getInstrInfo());
|
||||
if (!Node->isMachineOpcode())
|
||||
return Node;
|
||||
unsigned Opcode = Node->getMachineOpcode();
|
||||
SDValue FakeOp;
|
||||
|
||||
std::vector<SDValue> Ops;
|
||||
for(SDNode::op_iterator I = Node->op_begin(), E = Node->op_end();
|
||||
I != E; ++I)
|
||||
Ops.push_back(*I);
|
||||
|
||||
if (Opcode == AMDGPU::DOT_4) {
|
||||
int OperandIdx[] = {
|
||||
TII->getOperandIdx(Opcode, AMDGPU::OpName::src0_X),
|
||||
TII->getOperandIdx(Opcode, AMDGPU::OpName::src0_Y),
|
||||
TII->getOperandIdx(Opcode, AMDGPU::OpName::src0_Z),
|
||||
TII->getOperandIdx(Opcode, AMDGPU::OpName::src0_W),
|
||||
TII->getOperandIdx(Opcode, AMDGPU::OpName::src1_X),
|
||||
TII->getOperandIdx(Opcode, AMDGPU::OpName::src1_Y),
|
||||
TII->getOperandIdx(Opcode, AMDGPU::OpName::src1_Z),
|
||||
TII->getOperandIdx(Opcode, AMDGPU::OpName::src1_W)
|
||||
};
|
||||
int NegIdx[] = {
|
||||
TII->getOperandIdx(Opcode, AMDGPU::OpName::src0_neg_X),
|
||||
TII->getOperandIdx(Opcode, AMDGPU::OpName::src0_neg_Y),
|
||||
TII->getOperandIdx(Opcode, AMDGPU::OpName::src0_neg_Z),
|
||||
TII->getOperandIdx(Opcode, AMDGPU::OpName::src0_neg_W),
|
||||
TII->getOperandIdx(Opcode, AMDGPU::OpName::src1_neg_X),
|
||||
TII->getOperandIdx(Opcode, AMDGPU::OpName::src1_neg_Y),
|
||||
TII->getOperandIdx(Opcode, AMDGPU::OpName::src1_neg_Z),
|
||||
TII->getOperandIdx(Opcode, AMDGPU::OpName::src1_neg_W)
|
||||
};
|
||||
int AbsIdx[] = {
|
||||
TII->getOperandIdx(Opcode, AMDGPU::OpName::src0_abs_X),
|
||||
TII->getOperandIdx(Opcode, AMDGPU::OpName::src0_abs_Y),
|
||||
TII->getOperandIdx(Opcode, AMDGPU::OpName::src0_abs_Z),
|
||||
TII->getOperandIdx(Opcode, AMDGPU::OpName::src0_abs_W),
|
||||
TII->getOperandIdx(Opcode, AMDGPU::OpName::src1_abs_X),
|
||||
TII->getOperandIdx(Opcode, AMDGPU::OpName::src1_abs_Y),
|
||||
TII->getOperandIdx(Opcode, AMDGPU::OpName::src1_abs_Z),
|
||||
TII->getOperandIdx(Opcode, AMDGPU::OpName::src1_abs_W)
|
||||
};
|
||||
for (unsigned i = 0; i < 8; i++) {
|
||||
if (OperandIdx[i] < 0)
|
||||
return Node;
|
||||
SDValue &Src = Ops[OperandIdx[i] - 1];
|
||||
SDValue &Neg = Ops[NegIdx[i] - 1];
|
||||
SDValue &Abs = Ops[AbsIdx[i] - 1];
|
||||
bool HasDst = TII->getOperandIdx(Opcode, AMDGPU::OpName::dst) > -1;
|
||||
int SelIdx = TII->getSelIdx(Opcode, OperandIdx[i]);
|
||||
if (HasDst)
|
||||
SelIdx--;
|
||||
SDValue &Sel = (SelIdx > -1) ? Ops[SelIdx] : FakeOp;
|
||||
if (FoldOperand(Node, i, Src, Neg, Abs, Sel, DAG))
|
||||
return DAG.getMachineNode(Opcode, SDLoc(Node), Node->getVTList(), Ops);
|
||||
}
|
||||
} else {
|
||||
if (!TII->hasInstrModifiers(Opcode))
|
||||
return Node;
|
||||
int OperandIdx[] = {
|
||||
TII->getOperandIdx(Opcode, AMDGPU::OpName::src0),
|
||||
TII->getOperandIdx(Opcode, AMDGPU::OpName::src1),
|
||||
TII->getOperandIdx(Opcode, AMDGPU::OpName::src2)
|
||||
};
|
||||
int NegIdx[] = {
|
||||
TII->getOperandIdx(Opcode, AMDGPU::OpName::src0_neg),
|
||||
TII->getOperandIdx(Opcode, AMDGPU::OpName::src1_neg),
|
||||
TII->getOperandIdx(Opcode, AMDGPU::OpName::src2_neg)
|
||||
};
|
||||
int AbsIdx[] = {
|
||||
TII->getOperandIdx(Opcode, AMDGPU::OpName::src0_abs),
|
||||
TII->getOperandIdx(Opcode, AMDGPU::OpName::src1_abs),
|
||||
-1
|
||||
};
|
||||
for (unsigned i = 0; i < 3; i++) {
|
||||
if (OperandIdx[i] < 0)
|
||||
return Node;
|
||||
SDValue &Src = Ops[OperandIdx[i] - 1];
|
||||
SDValue &Neg = Ops[NegIdx[i] - 1];
|
||||
SDValue FakeAbs;
|
||||
SDValue &Abs = (AbsIdx[i] > -1) ? Ops[AbsIdx[i] - 1] : FakeAbs;
|
||||
bool HasDst = TII->getOperandIdx(Opcode, AMDGPU::OpName::dst) > -1;
|
||||
int SelIdx = TII->getSelIdx(Opcode, OperandIdx[i]);
|
||||
if (HasDst)
|
||||
SelIdx--;
|
||||
SDValue &Sel = (SelIdx > -1) ? Ops[SelIdx] : FakeOp;
|
||||
if (FoldOperand(Node, i, Src, Neg, Abs, Sel, DAG))
|
||||
return DAG.getMachineNode(Opcode, SDLoc(Node), Node->getVTList(), Ops);
|
||||
}
|
||||
}
|
||||
|
||||
return Node;
|
||||
}
|
||||
|
||||
@ -67,6 +67,7 @@ private:
|
||||
void getStackAddress(unsigned StackWidth, unsigned ElemIdx,
|
||||
unsigned &Channel, unsigned &PtrIncr) const;
|
||||
bool isZero(SDValue Op) const;
|
||||
virtual SDNode *PostISelFolding(MachineSDNode *N, SelectionDAG &DAG) const;
|
||||
};
|
||||
|
||||
} // End namespace llvm;
|
||||
|
||||
18
test/CodeGen/R600/complex-folding.ll
Normal file
18
test/CodeGen/R600/complex-folding.ll
Normal file
@ -0,0 +1,18 @@
|
||||
;RUN: llc < %s -march=r600 -mcpu=redwood | FileCheck %s
|
||||
|
||||
; CHECK: @main
|
||||
; CHECK-NOT: MOV
|
||||
define void @main() {
|
||||
entry:
|
||||
%0 = call float @llvm.R600.load.input(i32 0)
|
||||
%1 = call float @fabs(float %0)
|
||||
%2 = fptoui float %1 to i32
|
||||
%3 = bitcast i32 %2 to float
|
||||
%4 = insertelement <4 x float> undef, float %3, i32 0
|
||||
call void @llvm.R600.store.swizzle(<4 x float> %4, i32 0, i32 0)
|
||||
ret void
|
||||
}
|
||||
|
||||
declare float @llvm.R600.load.input(i32) readnone
|
||||
declare float @fabs(float ) readnone
|
||||
declare void @llvm.R600.store.swizzle(<4 x float>, i32, i32)
|
||||
Loading…
x
Reference in New Issue
Block a user