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https://github.com/c64scene-ar/llvm-6502.git
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9dd5b1fbd8
Copy the kill flags when swapping the operands. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@235687 91177308-0d34-0410-b5e6-96231b3b80d8
2724 lines
95 KiB
C++
2724 lines
95 KiB
C++
//===-- SIInstrInfo.cpp - SI Instruction Information ---------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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/// \file
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/// \brief SI Implementation of TargetInstrInfo.
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//
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//===----------------------------------------------------------------------===//
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#include "SIInstrInfo.h"
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#include "AMDGPUTargetMachine.h"
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#include "SIDefines.h"
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#include "SIMachineFunctionInfo.h"
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#include "llvm/CodeGen/MachineFrameInfo.h"
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#include "llvm/CodeGen/MachineInstrBuilder.h"
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#include "llvm/CodeGen/MachineRegisterInfo.h"
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#include "llvm/IR/Function.h"
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#include "llvm/CodeGen/RegisterScavenging.h"
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#include "llvm/MC/MCInstrDesc.h"
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#include "llvm/Support/Debug.h"
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using namespace llvm;
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SIInstrInfo::SIInstrInfo(const AMDGPUSubtarget &st)
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: AMDGPUInstrInfo(st), RI() {}
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//===----------------------------------------------------------------------===//
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// TargetInstrInfo callbacks
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//===----------------------------------------------------------------------===//
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static unsigned getNumOperandsNoGlue(SDNode *Node) {
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unsigned N = Node->getNumOperands();
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while (N && Node->getOperand(N - 1).getValueType() == MVT::Glue)
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--N;
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return N;
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}
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static SDValue findChainOperand(SDNode *Load) {
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SDValue LastOp = Load->getOperand(getNumOperandsNoGlue(Load) - 1);
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assert(LastOp.getValueType() == MVT::Other && "Chain missing from load node");
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return LastOp;
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}
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/// \brief Returns true if both nodes have the same value for the given
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/// operand \p Op, or if both nodes do not have this operand.
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static bool nodesHaveSameOperandValue(SDNode *N0, SDNode* N1, unsigned OpName) {
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unsigned Opc0 = N0->getMachineOpcode();
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unsigned Opc1 = N1->getMachineOpcode();
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int Op0Idx = AMDGPU::getNamedOperandIdx(Opc0, OpName);
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int Op1Idx = AMDGPU::getNamedOperandIdx(Opc1, OpName);
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if (Op0Idx == -1 && Op1Idx == -1)
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return true;
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if ((Op0Idx == -1 && Op1Idx != -1) ||
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(Op1Idx == -1 && Op0Idx != -1))
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return false;
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// getNamedOperandIdx returns the index for the MachineInstr's operands,
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// which includes the result as the first operand. We are indexing into the
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// MachineSDNode's operands, so we need to skip the result operand to get
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// the real index.
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--Op0Idx;
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--Op1Idx;
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return N0->getOperand(Op0Idx) == N1->getOperand(Op1Idx);
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}
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bool SIInstrInfo::isReallyTriviallyReMaterializable(const MachineInstr *MI,
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AliasAnalysis *AA) const {
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// TODO: The generic check fails for VALU instructions that should be
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// rematerializable due to implicit reads of exec. We really want all of the
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// generic logic for this except for this.
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switch (MI->getOpcode()) {
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case AMDGPU::V_MOV_B32_e32:
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case AMDGPU::V_MOV_B32_e64:
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return true;
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default:
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return false;
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}
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}
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bool SIInstrInfo::areLoadsFromSameBasePtr(SDNode *Load0, SDNode *Load1,
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int64_t &Offset0,
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int64_t &Offset1) const {
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if (!Load0->isMachineOpcode() || !Load1->isMachineOpcode())
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return false;
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unsigned Opc0 = Load0->getMachineOpcode();
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unsigned Opc1 = Load1->getMachineOpcode();
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// Make sure both are actually loads.
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if (!get(Opc0).mayLoad() || !get(Opc1).mayLoad())
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return false;
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if (isDS(Opc0) && isDS(Opc1)) {
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// FIXME: Handle this case:
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if (getNumOperandsNoGlue(Load0) != getNumOperandsNoGlue(Load1))
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return false;
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// Check base reg.
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if (Load0->getOperand(1) != Load1->getOperand(1))
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return false;
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// Check chain.
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if (findChainOperand(Load0) != findChainOperand(Load1))
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return false;
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// Skip read2 / write2 variants for simplicity.
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// TODO: We should report true if the used offsets are adjacent (excluded
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// st64 versions).
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if (AMDGPU::getNamedOperandIdx(Opc0, AMDGPU::OpName::data1) != -1 ||
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AMDGPU::getNamedOperandIdx(Opc1, AMDGPU::OpName::data1) != -1)
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return false;
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Offset0 = cast<ConstantSDNode>(Load0->getOperand(2))->getZExtValue();
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Offset1 = cast<ConstantSDNode>(Load1->getOperand(2))->getZExtValue();
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return true;
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}
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if (isSMRD(Opc0) && isSMRD(Opc1)) {
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assert(getNumOperandsNoGlue(Load0) == getNumOperandsNoGlue(Load1));
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// Check base reg.
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if (Load0->getOperand(0) != Load1->getOperand(0))
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return false;
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const ConstantSDNode *Load0Offset =
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dyn_cast<ConstantSDNode>(Load0->getOperand(1));
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const ConstantSDNode *Load1Offset =
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dyn_cast<ConstantSDNode>(Load1->getOperand(1));
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if (!Load0Offset || !Load1Offset)
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return false;
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// Check chain.
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if (findChainOperand(Load0) != findChainOperand(Load1))
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return false;
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Offset0 = Load0Offset->getZExtValue();
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Offset1 = Load1Offset->getZExtValue();
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return true;
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}
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// MUBUF and MTBUF can access the same addresses.
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if ((isMUBUF(Opc0) || isMTBUF(Opc0)) && (isMUBUF(Opc1) || isMTBUF(Opc1))) {
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// MUBUF and MTBUF have vaddr at different indices.
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if (!nodesHaveSameOperandValue(Load0, Load1, AMDGPU::OpName::soffset) ||
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findChainOperand(Load0) != findChainOperand(Load1) ||
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!nodesHaveSameOperandValue(Load0, Load1, AMDGPU::OpName::vaddr) ||
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!nodesHaveSameOperandValue(Load0, Load1, AMDGPU::OpName::srsrc))
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return false;
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int OffIdx0 = AMDGPU::getNamedOperandIdx(Opc0, AMDGPU::OpName::offset);
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int OffIdx1 = AMDGPU::getNamedOperandIdx(Opc1, AMDGPU::OpName::offset);
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if (OffIdx0 == -1 || OffIdx1 == -1)
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return false;
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// getNamedOperandIdx returns the index for MachineInstrs. Since they
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// inlcude the output in the operand list, but SDNodes don't, we need to
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// subtract the index by one.
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--OffIdx0;
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--OffIdx1;
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SDValue Off0 = Load0->getOperand(OffIdx0);
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SDValue Off1 = Load1->getOperand(OffIdx1);
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// The offset might be a FrameIndexSDNode.
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if (!isa<ConstantSDNode>(Off0) || !isa<ConstantSDNode>(Off1))
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return false;
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Offset0 = cast<ConstantSDNode>(Off0)->getZExtValue();
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Offset1 = cast<ConstantSDNode>(Off1)->getZExtValue();
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return true;
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}
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return false;
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}
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static bool isStride64(unsigned Opc) {
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switch (Opc) {
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case AMDGPU::DS_READ2ST64_B32:
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case AMDGPU::DS_READ2ST64_B64:
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case AMDGPU::DS_WRITE2ST64_B32:
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case AMDGPU::DS_WRITE2ST64_B64:
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return true;
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default:
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return false;
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}
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}
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bool SIInstrInfo::getLdStBaseRegImmOfs(MachineInstr *LdSt,
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unsigned &BaseReg, unsigned &Offset,
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const TargetRegisterInfo *TRI) const {
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unsigned Opc = LdSt->getOpcode();
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if (isDS(Opc)) {
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const MachineOperand *OffsetImm = getNamedOperand(*LdSt,
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AMDGPU::OpName::offset);
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if (OffsetImm) {
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// Normal, single offset LDS instruction.
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const MachineOperand *AddrReg = getNamedOperand(*LdSt,
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AMDGPU::OpName::addr);
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BaseReg = AddrReg->getReg();
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Offset = OffsetImm->getImm();
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return true;
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}
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// The 2 offset instructions use offset0 and offset1 instead. We can treat
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// these as a load with a single offset if the 2 offsets are consecutive. We
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// will use this for some partially aligned loads.
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const MachineOperand *Offset0Imm = getNamedOperand(*LdSt,
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AMDGPU::OpName::offset0);
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const MachineOperand *Offset1Imm = getNamedOperand(*LdSt,
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AMDGPU::OpName::offset1);
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uint8_t Offset0 = Offset0Imm->getImm();
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uint8_t Offset1 = Offset1Imm->getImm();
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assert(Offset1 > Offset0);
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if (Offset1 - Offset0 == 1) {
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// Each of these offsets is in element sized units, so we need to convert
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// to bytes of the individual reads.
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unsigned EltSize;
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if (LdSt->mayLoad())
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EltSize = getOpRegClass(*LdSt, 0)->getSize() / 2;
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else {
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assert(LdSt->mayStore());
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int Data0Idx = AMDGPU::getNamedOperandIdx(Opc, AMDGPU::OpName::data0);
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EltSize = getOpRegClass(*LdSt, Data0Idx)->getSize();
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}
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if (isStride64(Opc))
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EltSize *= 64;
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const MachineOperand *AddrReg = getNamedOperand(*LdSt,
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AMDGPU::OpName::addr);
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BaseReg = AddrReg->getReg();
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Offset = EltSize * Offset0;
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return true;
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}
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return false;
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}
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if (isMUBUF(Opc) || isMTBUF(Opc)) {
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if (AMDGPU::getNamedOperandIdx(Opc, AMDGPU::OpName::soffset) != -1)
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return false;
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const MachineOperand *AddrReg = getNamedOperand(*LdSt,
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AMDGPU::OpName::vaddr);
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if (!AddrReg)
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return false;
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const MachineOperand *OffsetImm = getNamedOperand(*LdSt,
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AMDGPU::OpName::offset);
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BaseReg = AddrReg->getReg();
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Offset = OffsetImm->getImm();
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return true;
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}
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if (isSMRD(Opc)) {
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const MachineOperand *OffsetImm = getNamedOperand(*LdSt,
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AMDGPU::OpName::offset);
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if (!OffsetImm)
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return false;
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const MachineOperand *SBaseReg = getNamedOperand(*LdSt,
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AMDGPU::OpName::sbase);
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BaseReg = SBaseReg->getReg();
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Offset = OffsetImm->getImm();
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return true;
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}
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return false;
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}
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bool SIInstrInfo::shouldClusterLoads(MachineInstr *FirstLdSt,
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MachineInstr *SecondLdSt,
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unsigned NumLoads) const {
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unsigned Opc0 = FirstLdSt->getOpcode();
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unsigned Opc1 = SecondLdSt->getOpcode();
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// TODO: This needs finer tuning
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if (NumLoads > 4)
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return false;
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if (isDS(Opc0) && isDS(Opc1))
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return true;
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if (isSMRD(Opc0) && isSMRD(Opc1))
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return true;
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if ((isMUBUF(Opc0) || isMTBUF(Opc0)) && (isMUBUF(Opc1) || isMTBUF(Opc1)))
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return true;
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return false;
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}
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void
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SIInstrInfo::copyPhysReg(MachineBasicBlock &MBB,
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MachineBasicBlock::iterator MI, DebugLoc DL,
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unsigned DestReg, unsigned SrcReg,
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bool KillSrc) const {
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// If we are trying to copy to or from SCC, there is a bug somewhere else in
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// the backend. While it may be theoretically possible to do this, it should
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// never be necessary.
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assert(DestReg != AMDGPU::SCC && SrcReg != AMDGPU::SCC);
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static const int16_t Sub0_15[] = {
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AMDGPU::sub0, AMDGPU::sub1, AMDGPU::sub2, AMDGPU::sub3,
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AMDGPU::sub4, AMDGPU::sub5, AMDGPU::sub6, AMDGPU::sub7,
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AMDGPU::sub8, AMDGPU::sub9, AMDGPU::sub10, AMDGPU::sub11,
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AMDGPU::sub12, AMDGPU::sub13, AMDGPU::sub14, AMDGPU::sub15, 0
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};
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static const int16_t Sub0_7[] = {
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AMDGPU::sub0, AMDGPU::sub1, AMDGPU::sub2, AMDGPU::sub3,
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AMDGPU::sub4, AMDGPU::sub5, AMDGPU::sub6, AMDGPU::sub7, 0
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};
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static const int16_t Sub0_3[] = {
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AMDGPU::sub0, AMDGPU::sub1, AMDGPU::sub2, AMDGPU::sub3, 0
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};
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static const int16_t Sub0_2[] = {
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AMDGPU::sub0, AMDGPU::sub1, AMDGPU::sub2, 0
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};
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static const int16_t Sub0_1[] = {
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AMDGPU::sub0, AMDGPU::sub1, 0
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};
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unsigned Opcode;
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const int16_t *SubIndices;
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if (AMDGPU::SReg_32RegClass.contains(DestReg)) {
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assert(AMDGPU::SReg_32RegClass.contains(SrcReg));
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BuildMI(MBB, MI, DL, get(AMDGPU::S_MOV_B32), DestReg)
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.addReg(SrcReg, getKillRegState(KillSrc));
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return;
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} else if (AMDGPU::SReg_64RegClass.contains(DestReg)) {
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if (DestReg == AMDGPU::VCC) {
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if (AMDGPU::SReg_64RegClass.contains(SrcReg)) {
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BuildMI(MBB, MI, DL, get(AMDGPU::S_MOV_B64), AMDGPU::VCC)
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.addReg(SrcReg, getKillRegState(KillSrc));
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} else {
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// FIXME: Hack until VReg_1 removed.
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assert(AMDGPU::VGPR_32RegClass.contains(SrcReg));
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BuildMI(MBB, MI, DL, get(AMDGPU::V_CMP_NE_I32_e32), AMDGPU::VCC)
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.addImm(0)
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.addReg(SrcReg, getKillRegState(KillSrc));
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}
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return;
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}
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assert(AMDGPU::SReg_64RegClass.contains(SrcReg));
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BuildMI(MBB, MI, DL, get(AMDGPU::S_MOV_B64), DestReg)
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.addReg(SrcReg, getKillRegState(KillSrc));
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return;
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} else if (AMDGPU::SReg_128RegClass.contains(DestReg)) {
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assert(AMDGPU::SReg_128RegClass.contains(SrcReg));
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Opcode = AMDGPU::S_MOV_B32;
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SubIndices = Sub0_3;
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} else if (AMDGPU::SReg_256RegClass.contains(DestReg)) {
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assert(AMDGPU::SReg_256RegClass.contains(SrcReg));
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Opcode = AMDGPU::S_MOV_B32;
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SubIndices = Sub0_7;
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} else if (AMDGPU::SReg_512RegClass.contains(DestReg)) {
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assert(AMDGPU::SReg_512RegClass.contains(SrcReg));
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Opcode = AMDGPU::S_MOV_B32;
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SubIndices = Sub0_15;
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} else if (AMDGPU::VGPR_32RegClass.contains(DestReg)) {
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assert(AMDGPU::VGPR_32RegClass.contains(SrcReg) ||
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AMDGPU::SReg_32RegClass.contains(SrcReg));
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BuildMI(MBB, MI, DL, get(AMDGPU::V_MOV_B32_e32), DestReg)
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.addReg(SrcReg, getKillRegState(KillSrc));
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return;
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} else if (AMDGPU::VReg_64RegClass.contains(DestReg)) {
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assert(AMDGPU::VReg_64RegClass.contains(SrcReg) ||
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AMDGPU::SReg_64RegClass.contains(SrcReg));
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Opcode = AMDGPU::V_MOV_B32_e32;
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SubIndices = Sub0_1;
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} else if (AMDGPU::VReg_96RegClass.contains(DestReg)) {
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assert(AMDGPU::VReg_96RegClass.contains(SrcReg));
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Opcode = AMDGPU::V_MOV_B32_e32;
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SubIndices = Sub0_2;
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} else if (AMDGPU::VReg_128RegClass.contains(DestReg)) {
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assert(AMDGPU::VReg_128RegClass.contains(SrcReg) ||
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AMDGPU::SReg_128RegClass.contains(SrcReg));
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Opcode = AMDGPU::V_MOV_B32_e32;
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SubIndices = Sub0_3;
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} else if (AMDGPU::VReg_256RegClass.contains(DestReg)) {
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assert(AMDGPU::VReg_256RegClass.contains(SrcReg) ||
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AMDGPU::SReg_256RegClass.contains(SrcReg));
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Opcode = AMDGPU::V_MOV_B32_e32;
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SubIndices = Sub0_7;
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} else if (AMDGPU::VReg_512RegClass.contains(DestReg)) {
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assert(AMDGPU::VReg_512RegClass.contains(SrcReg) ||
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AMDGPU::SReg_512RegClass.contains(SrcReg));
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Opcode = AMDGPU::V_MOV_B32_e32;
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SubIndices = Sub0_15;
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} else {
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llvm_unreachable("Can't copy register!");
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}
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while (unsigned SubIdx = *SubIndices++) {
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MachineInstrBuilder Builder = BuildMI(MBB, MI, DL,
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get(Opcode), RI.getSubReg(DestReg, SubIdx));
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Builder.addReg(RI.getSubReg(SrcReg, SubIdx), getKillRegState(KillSrc));
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if (*SubIndices)
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Builder.addReg(DestReg, RegState::Define | RegState::Implicit);
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}
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}
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unsigned SIInstrInfo::commuteOpcode(const MachineInstr &MI) const {
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const unsigned Opcode = MI.getOpcode();
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int NewOpc;
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// Try to map original to commuted opcode
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NewOpc = AMDGPU::getCommuteRev(Opcode);
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// Check if the commuted (REV) opcode exists on the target.
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if (NewOpc != -1 && pseudoToMCOpcode(NewOpc) != -1)
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return NewOpc;
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// Try to map commuted to original opcode
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NewOpc = AMDGPU::getCommuteOrig(Opcode);
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// Check if the original (non-REV) opcode exists on the target.
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if (NewOpc != -1 && pseudoToMCOpcode(NewOpc) != -1)
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return NewOpc;
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return Opcode;
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}
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unsigned SIInstrInfo::getMovOpcode(const TargetRegisterClass *DstRC) const {
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if (DstRC->getSize() == 4) {
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return RI.isSGPRClass(DstRC) ? AMDGPU::S_MOV_B32 : AMDGPU::V_MOV_B32_e32;
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} else if (DstRC->getSize() == 8 && RI.isSGPRClass(DstRC)) {
|
|
return AMDGPU::S_MOV_B64;
|
|
} else if (DstRC->getSize() == 8 && !RI.isSGPRClass(DstRC)) {
|
|
return AMDGPU::V_MOV_B64_PSEUDO;
|
|
}
|
|
return AMDGPU::COPY;
|
|
}
|
|
|
|
void SIInstrInfo::storeRegToStackSlot(MachineBasicBlock &MBB,
|
|
MachineBasicBlock::iterator MI,
|
|
unsigned SrcReg, bool isKill,
|
|
int FrameIndex,
|
|
const TargetRegisterClass *RC,
|
|
const TargetRegisterInfo *TRI) const {
|
|
MachineFunction *MF = MBB.getParent();
|
|
SIMachineFunctionInfo *MFI = MF->getInfo<SIMachineFunctionInfo>();
|
|
MachineFrameInfo *FrameInfo = MF->getFrameInfo();
|
|
DebugLoc DL = MBB.findDebugLoc(MI);
|
|
int Opcode = -1;
|
|
|
|
if (RI.isSGPRClass(RC)) {
|
|
// We are only allowed to create one new instruction when spilling
|
|
// registers, so we need to use pseudo instruction for spilling
|
|
// SGPRs.
|
|
switch (RC->getSize() * 8) {
|
|
case 32: Opcode = AMDGPU::SI_SPILL_S32_SAVE; break;
|
|
case 64: Opcode = AMDGPU::SI_SPILL_S64_SAVE; break;
|
|
case 128: Opcode = AMDGPU::SI_SPILL_S128_SAVE; break;
|
|
case 256: Opcode = AMDGPU::SI_SPILL_S256_SAVE; break;
|
|
case 512: Opcode = AMDGPU::SI_SPILL_S512_SAVE; break;
|
|
}
|
|
} else if(RI.hasVGPRs(RC) && ST.isVGPRSpillingEnabled(MFI)) {
|
|
MFI->setHasSpilledVGPRs();
|
|
|
|
switch(RC->getSize() * 8) {
|
|
case 32: Opcode = AMDGPU::SI_SPILL_V32_SAVE; break;
|
|
case 64: Opcode = AMDGPU::SI_SPILL_V64_SAVE; break;
|
|
case 96: Opcode = AMDGPU::SI_SPILL_V96_SAVE; break;
|
|
case 128: Opcode = AMDGPU::SI_SPILL_V128_SAVE; break;
|
|
case 256: Opcode = AMDGPU::SI_SPILL_V256_SAVE; break;
|
|
case 512: Opcode = AMDGPU::SI_SPILL_V512_SAVE; break;
|
|
}
|
|
}
|
|
|
|
if (Opcode != -1) {
|
|
FrameInfo->setObjectAlignment(FrameIndex, 4);
|
|
BuildMI(MBB, MI, DL, get(Opcode))
|
|
.addReg(SrcReg)
|
|
.addFrameIndex(FrameIndex)
|
|
// Place-holder registers, these will be filled in by
|
|
// SIPrepareScratchRegs.
|
|
.addReg(AMDGPU::SGPR0_SGPR1_SGPR2_SGPR3, RegState::Undef)
|
|
.addReg(AMDGPU::SGPR0, RegState::Undef);
|
|
} else {
|
|
LLVMContext &Ctx = MF->getFunction()->getContext();
|
|
Ctx.emitError("SIInstrInfo::storeRegToStackSlot - Do not know how to"
|
|
" spill register");
|
|
BuildMI(MBB, MI, DL, get(AMDGPU::KILL))
|
|
.addReg(SrcReg);
|
|
}
|
|
}
|
|
|
|
void SIInstrInfo::loadRegFromStackSlot(MachineBasicBlock &MBB,
|
|
MachineBasicBlock::iterator MI,
|
|
unsigned DestReg, int FrameIndex,
|
|
const TargetRegisterClass *RC,
|
|
const TargetRegisterInfo *TRI) const {
|
|
MachineFunction *MF = MBB.getParent();
|
|
const SIMachineFunctionInfo *MFI = MF->getInfo<SIMachineFunctionInfo>();
|
|
MachineFrameInfo *FrameInfo = MF->getFrameInfo();
|
|
DebugLoc DL = MBB.findDebugLoc(MI);
|
|
int Opcode = -1;
|
|
|
|
if (RI.isSGPRClass(RC)){
|
|
switch(RC->getSize() * 8) {
|
|
case 32: Opcode = AMDGPU::SI_SPILL_S32_RESTORE; break;
|
|
case 64: Opcode = AMDGPU::SI_SPILL_S64_RESTORE; break;
|
|
case 128: Opcode = AMDGPU::SI_SPILL_S128_RESTORE; break;
|
|
case 256: Opcode = AMDGPU::SI_SPILL_S256_RESTORE; break;
|
|
case 512: Opcode = AMDGPU::SI_SPILL_S512_RESTORE; break;
|
|
}
|
|
} else if(RI.hasVGPRs(RC) && ST.isVGPRSpillingEnabled(MFI)) {
|
|
switch(RC->getSize() * 8) {
|
|
case 32: Opcode = AMDGPU::SI_SPILL_V32_RESTORE; break;
|
|
case 64: Opcode = AMDGPU::SI_SPILL_V64_RESTORE; break;
|
|
case 96: Opcode = AMDGPU::SI_SPILL_V96_RESTORE; break;
|
|
case 128: Opcode = AMDGPU::SI_SPILL_V128_RESTORE; break;
|
|
case 256: Opcode = AMDGPU::SI_SPILL_V256_RESTORE; break;
|
|
case 512: Opcode = AMDGPU::SI_SPILL_V512_RESTORE; break;
|
|
}
|
|
}
|
|
|
|
if (Opcode != -1) {
|
|
FrameInfo->setObjectAlignment(FrameIndex, 4);
|
|
BuildMI(MBB, MI, DL, get(Opcode), DestReg)
|
|
.addFrameIndex(FrameIndex)
|
|
// Place-holder registers, these will be filled in by
|
|
// SIPrepareScratchRegs.
|
|
.addReg(AMDGPU::SGPR0_SGPR1_SGPR2_SGPR3, RegState::Undef)
|
|
.addReg(AMDGPU::SGPR0, RegState::Undef);
|
|
|
|
} else {
|
|
LLVMContext &Ctx = MF->getFunction()->getContext();
|
|
Ctx.emitError("SIInstrInfo::loadRegFromStackSlot - Do not know how to"
|
|
" restore register");
|
|
BuildMI(MBB, MI, DL, get(AMDGPU::IMPLICIT_DEF), DestReg);
|
|
}
|
|
}
|
|
|
|
/// \param @Offset Offset in bytes of the FrameIndex being spilled
|
|
unsigned SIInstrInfo::calculateLDSSpillAddress(MachineBasicBlock &MBB,
|
|
MachineBasicBlock::iterator MI,
|
|
RegScavenger *RS, unsigned TmpReg,
|
|
unsigned FrameOffset,
|
|
unsigned Size) const {
|
|
MachineFunction *MF = MBB.getParent();
|
|
SIMachineFunctionInfo *MFI = MF->getInfo<SIMachineFunctionInfo>();
|
|
const AMDGPUSubtarget &ST = MF->getSubtarget<AMDGPUSubtarget>();
|
|
const SIRegisterInfo *TRI =
|
|
static_cast<const SIRegisterInfo*>(ST.getRegisterInfo());
|
|
DebugLoc DL = MBB.findDebugLoc(MI);
|
|
unsigned WorkGroupSize = MFI->getMaximumWorkGroupSize(*MF);
|
|
unsigned WavefrontSize = ST.getWavefrontSize();
|
|
|
|
unsigned TIDReg = MFI->getTIDReg();
|
|
if (!MFI->hasCalculatedTID()) {
|
|
MachineBasicBlock &Entry = MBB.getParent()->front();
|
|
MachineBasicBlock::iterator Insert = Entry.front();
|
|
DebugLoc DL = Insert->getDebugLoc();
|
|
|
|
TIDReg = RI.findUnusedRegister(MF->getRegInfo(), &AMDGPU::VGPR_32RegClass);
|
|
if (TIDReg == AMDGPU::NoRegister)
|
|
return TIDReg;
|
|
|
|
|
|
if (MFI->getShaderType() == ShaderType::COMPUTE &&
|
|
WorkGroupSize > WavefrontSize) {
|
|
|
|
unsigned TIDIGXReg = TRI->getPreloadedValue(*MF, SIRegisterInfo::TIDIG_X);
|
|
unsigned TIDIGYReg = TRI->getPreloadedValue(*MF, SIRegisterInfo::TIDIG_Y);
|
|
unsigned TIDIGZReg = TRI->getPreloadedValue(*MF, SIRegisterInfo::TIDIG_Z);
|
|
unsigned InputPtrReg =
|
|
TRI->getPreloadedValue(*MF, SIRegisterInfo::INPUT_PTR);
|
|
for (unsigned Reg : {TIDIGXReg, TIDIGYReg, TIDIGZReg}) {
|
|
if (!Entry.isLiveIn(Reg))
|
|
Entry.addLiveIn(Reg);
|
|
}
|
|
|
|
RS->enterBasicBlock(&Entry);
|
|
unsigned STmp0 = RS->scavengeRegister(&AMDGPU::SGPR_32RegClass, 0);
|
|
unsigned STmp1 = RS->scavengeRegister(&AMDGPU::SGPR_32RegClass, 0);
|
|
BuildMI(Entry, Insert, DL, get(AMDGPU::S_LOAD_DWORD_IMM), STmp0)
|
|
.addReg(InputPtrReg)
|
|
.addImm(SI::KernelInputOffsets::NGROUPS_Z);
|
|
BuildMI(Entry, Insert, DL, get(AMDGPU::S_LOAD_DWORD_IMM), STmp1)
|
|
.addReg(InputPtrReg)
|
|
.addImm(SI::KernelInputOffsets::NGROUPS_Y);
|
|
|
|
// NGROUPS.X * NGROUPS.Y
|
|
BuildMI(Entry, Insert, DL, get(AMDGPU::S_MUL_I32), STmp1)
|
|
.addReg(STmp1)
|
|
.addReg(STmp0);
|
|
// (NGROUPS.X * NGROUPS.Y) * TIDIG.X
|
|
BuildMI(Entry, Insert, DL, get(AMDGPU::V_MUL_U32_U24_e32), TIDReg)
|
|
.addReg(STmp1)
|
|
.addReg(TIDIGXReg);
|
|
// NGROUPS.Z * TIDIG.Y + (NGROUPS.X * NGROPUS.Y * TIDIG.X)
|
|
BuildMI(Entry, Insert, DL, get(AMDGPU::V_MAD_U32_U24), TIDReg)
|
|
.addReg(STmp0)
|
|
.addReg(TIDIGYReg)
|
|
.addReg(TIDReg);
|
|
// (NGROUPS.Z * TIDIG.Y + (NGROUPS.X * NGROPUS.Y * TIDIG.X)) + TIDIG.Z
|
|
BuildMI(Entry, Insert, DL, get(AMDGPU::V_ADD_I32_e32), TIDReg)
|
|
.addReg(TIDReg)
|
|
.addReg(TIDIGZReg);
|
|
} else {
|
|
// Get the wave id
|
|
BuildMI(Entry, Insert, DL, get(AMDGPU::V_MBCNT_LO_U32_B32_e64),
|
|
TIDReg)
|
|
.addImm(-1)
|
|
.addImm(0);
|
|
|
|
BuildMI(Entry, Insert, DL, get(AMDGPU::V_MBCNT_HI_U32_B32_e64),
|
|
TIDReg)
|
|
.addImm(-1)
|
|
.addReg(TIDReg);
|
|
}
|
|
|
|
BuildMI(Entry, Insert, DL, get(AMDGPU::V_LSHLREV_B32_e32),
|
|
TIDReg)
|
|
.addImm(2)
|
|
.addReg(TIDReg);
|
|
MFI->setTIDReg(TIDReg);
|
|
}
|
|
|
|
// Add FrameIndex to LDS offset
|
|
unsigned LDSOffset = MFI->LDSSize + (FrameOffset * WorkGroupSize);
|
|
BuildMI(MBB, MI, DL, get(AMDGPU::V_ADD_I32_e32), TmpReg)
|
|
.addImm(LDSOffset)
|
|
.addReg(TIDReg);
|
|
|
|
return TmpReg;
|
|
}
|
|
|
|
void SIInstrInfo::insertNOPs(MachineBasicBlock::iterator MI,
|
|
int Count) const {
|
|
while (Count > 0) {
|
|
int Arg;
|
|
if (Count >= 8)
|
|
Arg = 7;
|
|
else
|
|
Arg = Count - 1;
|
|
Count -= 8;
|
|
BuildMI(*MI->getParent(), MI, MI->getDebugLoc(), get(AMDGPU::S_NOP))
|
|
.addImm(Arg);
|
|
}
|
|
}
|
|
|
|
bool SIInstrInfo::expandPostRAPseudo(MachineBasicBlock::iterator MI) const {
|
|
MachineBasicBlock &MBB = *MI->getParent();
|
|
DebugLoc DL = MBB.findDebugLoc(MI);
|
|
switch (MI->getOpcode()) {
|
|
default: return AMDGPUInstrInfo::expandPostRAPseudo(MI);
|
|
|
|
case AMDGPU::SI_CONSTDATA_PTR: {
|
|
unsigned Reg = MI->getOperand(0).getReg();
|
|
unsigned RegLo = RI.getSubReg(Reg, AMDGPU::sub0);
|
|
unsigned RegHi = RI.getSubReg(Reg, AMDGPU::sub1);
|
|
|
|
BuildMI(MBB, MI, DL, get(AMDGPU::S_GETPC_B64), Reg);
|
|
|
|
// Add 32-bit offset from this instruction to the start of the constant data.
|
|
BuildMI(MBB, MI, DL, get(AMDGPU::S_ADD_U32), RegLo)
|
|
.addReg(RegLo)
|
|
.addTargetIndex(AMDGPU::TI_CONSTDATA_START)
|
|
.addReg(AMDGPU::SCC, RegState::Define | RegState::Implicit);
|
|
BuildMI(MBB, MI, DL, get(AMDGPU::S_ADDC_U32), RegHi)
|
|
.addReg(RegHi)
|
|
.addImm(0)
|
|
.addReg(AMDGPU::SCC, RegState::Define | RegState::Implicit)
|
|
.addReg(AMDGPU::SCC, RegState::Implicit);
|
|
MI->eraseFromParent();
|
|
break;
|
|
}
|
|
case AMDGPU::SGPR_USE:
|
|
// This is just a placeholder for register allocation.
|
|
MI->eraseFromParent();
|
|
break;
|
|
|
|
case AMDGPU::V_MOV_B64_PSEUDO: {
|
|
unsigned Dst = MI->getOperand(0).getReg();
|
|
unsigned DstLo = RI.getSubReg(Dst, AMDGPU::sub0);
|
|
unsigned DstHi = RI.getSubReg(Dst, AMDGPU::sub1);
|
|
|
|
const MachineOperand &SrcOp = MI->getOperand(1);
|
|
// FIXME: Will this work for 64-bit floating point immediates?
|
|
assert(!SrcOp.isFPImm());
|
|
if (SrcOp.isImm()) {
|
|
APInt Imm(64, SrcOp.getImm());
|
|
BuildMI(MBB, MI, DL, get(AMDGPU::V_MOV_B32_e32), DstLo)
|
|
.addImm(Imm.getLoBits(32).getZExtValue())
|
|
.addReg(Dst, RegState::Implicit);
|
|
BuildMI(MBB, MI, DL, get(AMDGPU::V_MOV_B32_e32), DstHi)
|
|
.addImm(Imm.getHiBits(32).getZExtValue())
|
|
.addReg(Dst, RegState::Implicit);
|
|
} else {
|
|
assert(SrcOp.isReg());
|
|
BuildMI(MBB, MI, DL, get(AMDGPU::V_MOV_B32_e32), DstLo)
|
|
.addReg(RI.getSubReg(SrcOp.getReg(), AMDGPU::sub0))
|
|
.addReg(Dst, RegState::Implicit);
|
|
BuildMI(MBB, MI, DL, get(AMDGPU::V_MOV_B32_e32), DstHi)
|
|
.addReg(RI.getSubReg(SrcOp.getReg(), AMDGPU::sub1))
|
|
.addReg(Dst, RegState::Implicit);
|
|
}
|
|
MI->eraseFromParent();
|
|
break;
|
|
}
|
|
|
|
case AMDGPU::V_CNDMASK_B64_PSEUDO: {
|
|
unsigned Dst = MI->getOperand(0).getReg();
|
|
unsigned DstLo = RI.getSubReg(Dst, AMDGPU::sub0);
|
|
unsigned DstHi = RI.getSubReg(Dst, AMDGPU::sub1);
|
|
unsigned Src0 = MI->getOperand(1).getReg();
|
|
unsigned Src1 = MI->getOperand(2).getReg();
|
|
const MachineOperand &SrcCond = MI->getOperand(3);
|
|
|
|
BuildMI(MBB, MI, DL, get(AMDGPU::V_CNDMASK_B32_e64), DstLo)
|
|
.addReg(RI.getSubReg(Src0, AMDGPU::sub0))
|
|
.addReg(RI.getSubReg(Src1, AMDGPU::sub0))
|
|
.addOperand(SrcCond);
|
|
BuildMI(MBB, MI, DL, get(AMDGPU::V_CNDMASK_B32_e64), DstHi)
|
|
.addReg(RI.getSubReg(Src0, AMDGPU::sub1))
|
|
.addReg(RI.getSubReg(Src1, AMDGPU::sub1))
|
|
.addOperand(SrcCond);
|
|
MI->eraseFromParent();
|
|
break;
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
MachineInstr *SIInstrInfo::commuteInstruction(MachineInstr *MI,
|
|
bool NewMI) const {
|
|
|
|
if (MI->getNumOperands() < 3)
|
|
return nullptr;
|
|
|
|
int Src0Idx = AMDGPU::getNamedOperandIdx(MI->getOpcode(),
|
|
AMDGPU::OpName::src0);
|
|
assert(Src0Idx != -1 && "Should always have src0 operand");
|
|
|
|
MachineOperand &Src0 = MI->getOperand(Src0Idx);
|
|
if (!Src0.isReg())
|
|
return nullptr;
|
|
|
|
int Src1Idx = AMDGPU::getNamedOperandIdx(MI->getOpcode(),
|
|
AMDGPU::OpName::src1);
|
|
if (Src1Idx == -1)
|
|
return nullptr;
|
|
|
|
MachineOperand &Src1 = MI->getOperand(Src1Idx);
|
|
|
|
// Make sure it's legal to commute operands for VOP2.
|
|
if (isVOP2(MI->getOpcode()) &&
|
|
(!isOperandLegal(MI, Src0Idx, &Src1) ||
|
|
!isOperandLegal(MI, Src1Idx, &Src0))) {
|
|
return nullptr;
|
|
}
|
|
|
|
if (!Src1.isReg()) {
|
|
// Allow commuting instructions with Imm operands.
|
|
if (NewMI || !Src1.isImm() ||
|
|
(!isVOP2(MI->getOpcode()) && !isVOP3(MI->getOpcode()))) {
|
|
return nullptr;
|
|
}
|
|
|
|
// Be sure to copy the source modifiers to the right place.
|
|
if (MachineOperand *Src0Mods
|
|
= getNamedOperand(*MI, AMDGPU::OpName::src0_modifiers)) {
|
|
MachineOperand *Src1Mods
|
|
= getNamedOperand(*MI, AMDGPU::OpName::src1_modifiers);
|
|
|
|
int Src0ModsVal = Src0Mods->getImm();
|
|
if (!Src1Mods && Src0ModsVal != 0)
|
|
return nullptr;
|
|
|
|
// XXX - This assert might be a lie. It might be useful to have a neg
|
|
// modifier with 0.0.
|
|
int Src1ModsVal = Src1Mods->getImm();
|
|
assert((Src1ModsVal == 0) && "Not expecting modifiers with immediates");
|
|
|
|
Src1Mods->setImm(Src0ModsVal);
|
|
Src0Mods->setImm(Src1ModsVal);
|
|
}
|
|
|
|
unsigned Reg = Src0.getReg();
|
|
unsigned SubReg = Src0.getSubReg();
|
|
if (Src1.isImm())
|
|
Src0.ChangeToImmediate(Src1.getImm());
|
|
else
|
|
llvm_unreachable("Should only have immediates");
|
|
|
|
Src1.ChangeToRegister(Reg, false);
|
|
Src1.setSubReg(SubReg);
|
|
} else {
|
|
MI = TargetInstrInfo::commuteInstruction(MI, NewMI);
|
|
}
|
|
|
|
if (MI)
|
|
MI->setDesc(get(commuteOpcode(*MI)));
|
|
|
|
return MI;
|
|
}
|
|
|
|
// This needs to be implemented because the source modifiers may be inserted
|
|
// between the true commutable operands, and the base
|
|
// TargetInstrInfo::commuteInstruction uses it.
|
|
bool SIInstrInfo::findCommutedOpIndices(MachineInstr *MI,
|
|
unsigned &SrcOpIdx1,
|
|
unsigned &SrcOpIdx2) const {
|
|
const MCInstrDesc &MCID = MI->getDesc();
|
|
if (!MCID.isCommutable())
|
|
return false;
|
|
|
|
unsigned Opc = MI->getOpcode();
|
|
int Src0Idx = AMDGPU::getNamedOperandIdx(Opc, AMDGPU::OpName::src0);
|
|
if (Src0Idx == -1)
|
|
return false;
|
|
|
|
// FIXME: Workaround TargetInstrInfo::commuteInstruction asserting on
|
|
// immediate.
|
|
if (!MI->getOperand(Src0Idx).isReg())
|
|
return false;
|
|
|
|
int Src1Idx = AMDGPU::getNamedOperandIdx(Opc, AMDGPU::OpName::src1);
|
|
if (Src1Idx == -1)
|
|
return false;
|
|
|
|
if (!MI->getOperand(Src1Idx).isReg())
|
|
return false;
|
|
|
|
// If any source modifiers are set, the generic instruction commuting won't
|
|
// understand how to copy the source modifiers.
|
|
if (hasModifiersSet(*MI, AMDGPU::OpName::src0_modifiers) ||
|
|
hasModifiersSet(*MI, AMDGPU::OpName::src1_modifiers))
|
|
return false;
|
|
|
|
SrcOpIdx1 = Src0Idx;
|
|
SrcOpIdx2 = Src1Idx;
|
|
return true;
|
|
}
|
|
|
|
MachineInstr *SIInstrInfo::buildMovInstr(MachineBasicBlock *MBB,
|
|
MachineBasicBlock::iterator I,
|
|
unsigned DstReg,
|
|
unsigned SrcReg) const {
|
|
return BuildMI(*MBB, I, MBB->findDebugLoc(I), get(AMDGPU::V_MOV_B32_e32),
|
|
DstReg) .addReg(SrcReg);
|
|
}
|
|
|
|
bool SIInstrInfo::isMov(unsigned Opcode) const {
|
|
switch(Opcode) {
|
|
default: return false;
|
|
case AMDGPU::S_MOV_B32:
|
|
case AMDGPU::S_MOV_B64:
|
|
case AMDGPU::V_MOV_B32_e32:
|
|
case AMDGPU::V_MOV_B32_e64:
|
|
return true;
|
|
}
|
|
}
|
|
|
|
bool
|
|
SIInstrInfo::isSafeToMoveRegClassDefs(const TargetRegisterClass *RC) const {
|
|
return RC != &AMDGPU::EXECRegRegClass;
|
|
}
|
|
|
|
static void removeModOperands(MachineInstr &MI) {
|
|
unsigned Opc = MI.getOpcode();
|
|
int Src0ModIdx = AMDGPU::getNamedOperandIdx(Opc,
|
|
AMDGPU::OpName::src0_modifiers);
|
|
int Src1ModIdx = AMDGPU::getNamedOperandIdx(Opc,
|
|
AMDGPU::OpName::src1_modifiers);
|
|
int Src2ModIdx = AMDGPU::getNamedOperandIdx(Opc,
|
|
AMDGPU::OpName::src2_modifiers);
|
|
|
|
MI.RemoveOperand(Src2ModIdx);
|
|
MI.RemoveOperand(Src1ModIdx);
|
|
MI.RemoveOperand(Src0ModIdx);
|
|
}
|
|
|
|
bool SIInstrInfo::FoldImmediate(MachineInstr *UseMI, MachineInstr *DefMI,
|
|
unsigned Reg, MachineRegisterInfo *MRI) const {
|
|
if (!MRI->hasOneNonDBGUse(Reg))
|
|
return false;
|
|
|
|
unsigned Opc = UseMI->getOpcode();
|
|
if (Opc == AMDGPU::V_MAD_F32) {
|
|
// Don't fold if we are using source modifiers. The new VOP2 instructions
|
|
// don't have them.
|
|
if (hasModifiersSet(*UseMI, AMDGPU::OpName::src0_modifiers) ||
|
|
hasModifiersSet(*UseMI, AMDGPU::OpName::src1_modifiers) ||
|
|
hasModifiersSet(*UseMI, AMDGPU::OpName::src2_modifiers)) {
|
|
return false;
|
|
}
|
|
|
|
MachineOperand *Src0 = getNamedOperand(*UseMI, AMDGPU::OpName::src0);
|
|
MachineOperand *Src1 = getNamedOperand(*UseMI, AMDGPU::OpName::src1);
|
|
MachineOperand *Src2 = getNamedOperand(*UseMI, AMDGPU::OpName::src2);
|
|
|
|
// Multiplied part is the constant: Use v_madmk_f32
|
|
// We should only expect these to be on src0 due to canonicalizations.
|
|
if (Src0->isReg() && Src0->getReg() == Reg) {
|
|
if (!Src1->isReg() ||
|
|
(Src1->isReg() && RI.isSGPRClass(MRI->getRegClass(Src1->getReg()))))
|
|
return false;
|
|
|
|
if (!Src2->isReg() ||
|
|
(Src2->isReg() && RI.isSGPRClass(MRI->getRegClass(Src2->getReg()))))
|
|
return false;
|
|
|
|
// We need to do some weird looking operand shuffling since the madmk
|
|
// operands are out of the normal expected order with the multiplied
|
|
// constant as the last operand.
|
|
//
|
|
// v_mad_f32 src0, src1, src2 -> v_madmk_f32 src0 * src2K + src1
|
|
// src0 -> src2 K
|
|
// src1 -> src0
|
|
// src2 -> src1
|
|
|
|
const int64_t Imm = DefMI->getOperand(1).getImm();
|
|
|
|
// FIXME: This would be a lot easier if we could return a new instruction
|
|
// instead of having to modify in place.
|
|
|
|
// Remove these first since they are at the end.
|
|
UseMI->RemoveOperand(AMDGPU::getNamedOperandIdx(AMDGPU::V_MAD_F32,
|
|
AMDGPU::OpName::omod));
|
|
UseMI->RemoveOperand(AMDGPU::getNamedOperandIdx(AMDGPU::V_MAD_F32,
|
|
AMDGPU::OpName::clamp));
|
|
|
|
unsigned Src1Reg = Src1->getReg();
|
|
unsigned Src1SubReg = Src1->getSubReg();
|
|
unsigned Src2Reg = Src2->getReg();
|
|
unsigned Src2SubReg = Src2->getSubReg();
|
|
Src0->setReg(Src1Reg);
|
|
Src0->setSubReg(Src1SubReg);
|
|
Src0->setIsKill(Src1->isKill());
|
|
|
|
Src1->setReg(Src2Reg);
|
|
Src1->setSubReg(Src2SubReg);
|
|
Src1->setIsKill(Src2->isKill());
|
|
|
|
Src2->ChangeToImmediate(Imm);
|
|
|
|
removeModOperands(*UseMI);
|
|
UseMI->setDesc(get(AMDGPU::V_MADMK_F32));
|
|
|
|
bool DeleteDef = MRI->hasOneNonDBGUse(Reg);
|
|
if (DeleteDef)
|
|
DefMI->eraseFromParent();
|
|
|
|
return true;
|
|
}
|
|
|
|
// Added part is the constant: Use v_madak_f32
|
|
if (Src2->isReg() && Src2->getReg() == Reg) {
|
|
// Not allowed to use constant bus for another operand.
|
|
// We can however allow an inline immediate as src0.
|
|
if (!Src0->isImm() &&
|
|
(Src0->isReg() && RI.isSGPRClass(MRI->getRegClass(Src0->getReg()))))
|
|
return false;
|
|
|
|
if (!Src1->isReg() ||
|
|
(Src1->isReg() && RI.isSGPRClass(MRI->getRegClass(Src1->getReg()))))
|
|
return false;
|
|
|
|
const int64_t Imm = DefMI->getOperand(1).getImm();
|
|
|
|
// FIXME: This would be a lot easier if we could return a new instruction
|
|
// instead of having to modify in place.
|
|
|
|
// Remove these first since they are at the end.
|
|
UseMI->RemoveOperand(AMDGPU::getNamedOperandIdx(AMDGPU::V_MAD_F32,
|
|
AMDGPU::OpName::omod));
|
|
UseMI->RemoveOperand(AMDGPU::getNamedOperandIdx(AMDGPU::V_MAD_F32,
|
|
AMDGPU::OpName::clamp));
|
|
|
|
Src2->ChangeToImmediate(Imm);
|
|
|
|
// These come before src2.
|
|
removeModOperands(*UseMI);
|
|
UseMI->setDesc(get(AMDGPU::V_MADAK_F32));
|
|
|
|
bool DeleteDef = MRI->hasOneNonDBGUse(Reg);
|
|
if (DeleteDef)
|
|
DefMI->eraseFromParent();
|
|
|
|
return true;
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
bool
|
|
SIInstrInfo::isTriviallyReMaterializable(const MachineInstr *MI,
|
|
AliasAnalysis *AA) const {
|
|
switch(MI->getOpcode()) {
|
|
default: return AMDGPUInstrInfo::isTriviallyReMaterializable(MI, AA);
|
|
case AMDGPU::S_MOV_B32:
|
|
case AMDGPU::S_MOV_B64:
|
|
case AMDGPU::V_MOV_B32_e32:
|
|
return MI->getOperand(1).isImm();
|
|
}
|
|
}
|
|
|
|
static bool offsetsDoNotOverlap(int WidthA, int OffsetA,
|
|
int WidthB, int OffsetB) {
|
|
int LowOffset = OffsetA < OffsetB ? OffsetA : OffsetB;
|
|
int HighOffset = OffsetA < OffsetB ? OffsetB : OffsetA;
|
|
int LowWidth = (LowOffset == OffsetA) ? WidthA : WidthB;
|
|
return LowOffset + LowWidth <= HighOffset;
|
|
}
|
|
|
|
bool SIInstrInfo::checkInstOffsetsDoNotOverlap(MachineInstr *MIa,
|
|
MachineInstr *MIb) const {
|
|
unsigned BaseReg0, Offset0;
|
|
unsigned BaseReg1, Offset1;
|
|
|
|
if (getLdStBaseRegImmOfs(MIa, BaseReg0, Offset0, &RI) &&
|
|
getLdStBaseRegImmOfs(MIb, BaseReg1, Offset1, &RI)) {
|
|
assert(MIa->hasOneMemOperand() && MIb->hasOneMemOperand() &&
|
|
"read2 / write2 not expected here yet");
|
|
unsigned Width0 = (*MIa->memoperands_begin())->getSize();
|
|
unsigned Width1 = (*MIb->memoperands_begin())->getSize();
|
|
if (BaseReg0 == BaseReg1 &&
|
|
offsetsDoNotOverlap(Width0, Offset0, Width1, Offset1)) {
|
|
return true;
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
bool SIInstrInfo::areMemAccessesTriviallyDisjoint(MachineInstr *MIa,
|
|
MachineInstr *MIb,
|
|
AliasAnalysis *AA) const {
|
|
unsigned Opc0 = MIa->getOpcode();
|
|
unsigned Opc1 = MIb->getOpcode();
|
|
|
|
assert(MIa && (MIa->mayLoad() || MIa->mayStore()) &&
|
|
"MIa must load from or modify a memory location");
|
|
assert(MIb && (MIb->mayLoad() || MIb->mayStore()) &&
|
|
"MIb must load from or modify a memory location");
|
|
|
|
if (MIa->hasUnmodeledSideEffects() || MIb->hasUnmodeledSideEffects())
|
|
return false;
|
|
|
|
// XXX - Can we relax this between address spaces?
|
|
if (MIa->hasOrderedMemoryRef() || MIb->hasOrderedMemoryRef())
|
|
return false;
|
|
|
|
// TODO: Should we check the address space from the MachineMemOperand? That
|
|
// would allow us to distinguish objects we know don't alias based on the
|
|
// underlying addres space, even if it was lowered to a different one,
|
|
// e.g. private accesses lowered to use MUBUF instructions on a scratch
|
|
// buffer.
|
|
if (isDS(Opc0)) {
|
|
if (isDS(Opc1))
|
|
return checkInstOffsetsDoNotOverlap(MIa, MIb);
|
|
|
|
return !isFLAT(Opc1);
|
|
}
|
|
|
|
if (isMUBUF(Opc0) || isMTBUF(Opc0)) {
|
|
if (isMUBUF(Opc1) || isMTBUF(Opc1))
|
|
return checkInstOffsetsDoNotOverlap(MIa, MIb);
|
|
|
|
return !isFLAT(Opc1) && !isSMRD(Opc1);
|
|
}
|
|
|
|
if (isSMRD(Opc0)) {
|
|
if (isSMRD(Opc1))
|
|
return checkInstOffsetsDoNotOverlap(MIa, MIb);
|
|
|
|
return !isFLAT(Opc1) && !isMUBUF(Opc0) && !isMTBUF(Opc0);
|
|
}
|
|
|
|
if (isFLAT(Opc0)) {
|
|
if (isFLAT(Opc1))
|
|
return checkInstOffsetsDoNotOverlap(MIa, MIb);
|
|
|
|
return false;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
bool SIInstrInfo::isInlineConstant(const APInt &Imm) const {
|
|
int64_t SVal = Imm.getSExtValue();
|
|
if (SVal >= -16 && SVal <= 64)
|
|
return true;
|
|
|
|
if (Imm.getBitWidth() == 64) {
|
|
uint64_t Val = Imm.getZExtValue();
|
|
return (DoubleToBits(0.0) == Val) ||
|
|
(DoubleToBits(1.0) == Val) ||
|
|
(DoubleToBits(-1.0) == Val) ||
|
|
(DoubleToBits(0.5) == Val) ||
|
|
(DoubleToBits(-0.5) == Val) ||
|
|
(DoubleToBits(2.0) == Val) ||
|
|
(DoubleToBits(-2.0) == Val) ||
|
|
(DoubleToBits(4.0) == Val) ||
|
|
(DoubleToBits(-4.0) == Val);
|
|
}
|
|
|
|
// The actual type of the operand does not seem to matter as long
|
|
// as the bits match one of the inline immediate values. For example:
|
|
//
|
|
// -nan has the hexadecimal encoding of 0xfffffffe which is -2 in decimal,
|
|
// so it is a legal inline immediate.
|
|
//
|
|
// 1065353216 has the hexadecimal encoding 0x3f800000 which is 1.0f in
|
|
// floating-point, so it is a legal inline immediate.
|
|
uint32_t Val = Imm.getZExtValue();
|
|
|
|
return (FloatToBits(0.0f) == Val) ||
|
|
(FloatToBits(1.0f) == Val) ||
|
|
(FloatToBits(-1.0f) == Val) ||
|
|
(FloatToBits(0.5f) == Val) ||
|
|
(FloatToBits(-0.5f) == Val) ||
|
|
(FloatToBits(2.0f) == Val) ||
|
|
(FloatToBits(-2.0f) == Val) ||
|
|
(FloatToBits(4.0f) == Val) ||
|
|
(FloatToBits(-4.0f) == Val);
|
|
}
|
|
|
|
bool SIInstrInfo::isInlineConstant(const MachineOperand &MO,
|
|
unsigned OpSize) const {
|
|
if (MO.isImm()) {
|
|
// MachineOperand provides no way to tell the true operand size, since it
|
|
// only records a 64-bit value. We need to know the size to determine if a
|
|
// 32-bit floating point immediate bit pattern is legal for an integer
|
|
// immediate. It would be for any 32-bit integer operand, but would not be
|
|
// for a 64-bit one.
|
|
|
|
unsigned BitSize = 8 * OpSize;
|
|
return isInlineConstant(APInt(BitSize, MO.getImm(), true));
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
bool SIInstrInfo::isLiteralConstant(const MachineOperand &MO,
|
|
unsigned OpSize) const {
|
|
return MO.isImm() && !isInlineConstant(MO, OpSize);
|
|
}
|
|
|
|
static bool compareMachineOp(const MachineOperand &Op0,
|
|
const MachineOperand &Op1) {
|
|
if (Op0.getType() != Op1.getType())
|
|
return false;
|
|
|
|
switch (Op0.getType()) {
|
|
case MachineOperand::MO_Register:
|
|
return Op0.getReg() == Op1.getReg();
|
|
case MachineOperand::MO_Immediate:
|
|
return Op0.getImm() == Op1.getImm();
|
|
default:
|
|
llvm_unreachable("Didn't expect to be comparing these operand types");
|
|
}
|
|
}
|
|
|
|
bool SIInstrInfo::isImmOperandLegal(const MachineInstr *MI, unsigned OpNo,
|
|
const MachineOperand &MO) const {
|
|
const MCOperandInfo &OpInfo = get(MI->getOpcode()).OpInfo[OpNo];
|
|
|
|
assert(MO.isImm() || MO.isTargetIndex() || MO.isFI());
|
|
|
|
if (OpInfo.OperandType == MCOI::OPERAND_IMMEDIATE)
|
|
return true;
|
|
|
|
if (OpInfo.RegClass < 0)
|
|
return false;
|
|
|
|
unsigned OpSize = RI.getRegClass(OpInfo.RegClass)->getSize();
|
|
if (isLiteralConstant(MO, OpSize))
|
|
return RI.opCanUseLiteralConstant(OpInfo.OperandType);
|
|
|
|
return RI.opCanUseInlineConstant(OpInfo.OperandType);
|
|
}
|
|
|
|
bool SIInstrInfo::hasVALU32BitEncoding(unsigned Opcode) const {
|
|
int Op32 = AMDGPU::getVOPe32(Opcode);
|
|
if (Op32 == -1)
|
|
return false;
|
|
|
|
return pseudoToMCOpcode(Op32) != -1;
|
|
}
|
|
|
|
bool SIInstrInfo::hasModifiers(unsigned Opcode) const {
|
|
// The src0_modifier operand is present on all instructions
|
|
// that have modifiers.
|
|
|
|
return AMDGPU::getNamedOperandIdx(Opcode,
|
|
AMDGPU::OpName::src0_modifiers) != -1;
|
|
}
|
|
|
|
bool SIInstrInfo::hasModifiersSet(const MachineInstr &MI,
|
|
unsigned OpName) const {
|
|
const MachineOperand *Mods = getNamedOperand(MI, OpName);
|
|
return Mods && Mods->getImm();
|
|
}
|
|
|
|
bool SIInstrInfo::usesConstantBus(const MachineRegisterInfo &MRI,
|
|
const MachineOperand &MO,
|
|
unsigned OpSize) const {
|
|
// Literal constants use the constant bus.
|
|
if (isLiteralConstant(MO, OpSize))
|
|
return true;
|
|
|
|
if (!MO.isReg() || !MO.isUse())
|
|
return false;
|
|
|
|
if (TargetRegisterInfo::isVirtualRegister(MO.getReg()))
|
|
return RI.isSGPRClass(MRI.getRegClass(MO.getReg()));
|
|
|
|
// FLAT_SCR is just an SGPR pair.
|
|
if (!MO.isImplicit() && (MO.getReg() == AMDGPU::FLAT_SCR))
|
|
return true;
|
|
|
|
// EXEC register uses the constant bus.
|
|
if (!MO.isImplicit() && MO.getReg() == AMDGPU::EXEC)
|
|
return true;
|
|
|
|
// SGPRs use the constant bus
|
|
if (MO.getReg() == AMDGPU::M0 || MO.getReg() == AMDGPU::VCC ||
|
|
(!MO.isImplicit() &&
|
|
(AMDGPU::SGPR_32RegClass.contains(MO.getReg()) ||
|
|
AMDGPU::SGPR_64RegClass.contains(MO.getReg())))) {
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
bool SIInstrInfo::verifyInstruction(const MachineInstr *MI,
|
|
StringRef &ErrInfo) const {
|
|
uint16_t Opcode = MI->getOpcode();
|
|
const MachineRegisterInfo &MRI = MI->getParent()->getParent()->getRegInfo();
|
|
int Src0Idx = AMDGPU::getNamedOperandIdx(Opcode, AMDGPU::OpName::src0);
|
|
int Src1Idx = AMDGPU::getNamedOperandIdx(Opcode, AMDGPU::OpName::src1);
|
|
int Src2Idx = AMDGPU::getNamedOperandIdx(Opcode, AMDGPU::OpName::src2);
|
|
|
|
// Make sure the number of operands is correct.
|
|
const MCInstrDesc &Desc = get(Opcode);
|
|
if (!Desc.isVariadic() &&
|
|
Desc.getNumOperands() != MI->getNumExplicitOperands()) {
|
|
ErrInfo = "Instruction has wrong number of operands.";
|
|
return false;
|
|
}
|
|
|
|
// Make sure the register classes are correct
|
|
for (int i = 0, e = Desc.getNumOperands(); i != e; ++i) {
|
|
if (MI->getOperand(i).isFPImm()) {
|
|
ErrInfo = "FPImm Machine Operands are not supported. ISel should bitcast "
|
|
"all fp values to integers.";
|
|
return false;
|
|
}
|
|
|
|
int RegClass = Desc.OpInfo[i].RegClass;
|
|
|
|
switch (Desc.OpInfo[i].OperandType) {
|
|
case MCOI::OPERAND_REGISTER:
|
|
if (MI->getOperand(i).isImm()) {
|
|
ErrInfo = "Illegal immediate value for operand.";
|
|
return false;
|
|
}
|
|
break;
|
|
case AMDGPU::OPERAND_REG_IMM32:
|
|
break;
|
|
case AMDGPU::OPERAND_REG_INLINE_C:
|
|
if (isLiteralConstant(MI->getOperand(i),
|
|
RI.getRegClass(RegClass)->getSize())) {
|
|
ErrInfo = "Illegal immediate value for operand.";
|
|
return false;
|
|
}
|
|
break;
|
|
case MCOI::OPERAND_IMMEDIATE:
|
|
// Check if this operand is an immediate.
|
|
// FrameIndex operands will be replaced by immediates, so they are
|
|
// allowed.
|
|
if (!MI->getOperand(i).isImm() && !MI->getOperand(i).isFI()) {
|
|
ErrInfo = "Expected immediate, but got non-immediate";
|
|
return false;
|
|
}
|
|
// Fall-through
|
|
default:
|
|
continue;
|
|
}
|
|
|
|
if (!MI->getOperand(i).isReg())
|
|
continue;
|
|
|
|
if (RegClass != -1) {
|
|
unsigned Reg = MI->getOperand(i).getReg();
|
|
if (TargetRegisterInfo::isVirtualRegister(Reg))
|
|
continue;
|
|
|
|
const TargetRegisterClass *RC = RI.getRegClass(RegClass);
|
|
if (!RC->contains(Reg)) {
|
|
ErrInfo = "Operand has incorrect register class.";
|
|
return false;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
// Verify VOP*
|
|
if (isVOP1(Opcode) || isVOP2(Opcode) || isVOP3(Opcode) || isVOPC(Opcode)) {
|
|
// Only look at the true operands. Only a real operand can use the constant
|
|
// bus, and we don't want to check pseudo-operands like the source modifier
|
|
// flags.
|
|
const int OpIndices[] = { Src0Idx, Src1Idx, Src2Idx };
|
|
|
|
unsigned ConstantBusCount = 0;
|
|
unsigned SGPRUsed = AMDGPU::NoRegister;
|
|
for (int OpIdx : OpIndices) {
|
|
if (OpIdx == -1)
|
|
break;
|
|
const MachineOperand &MO = MI->getOperand(OpIdx);
|
|
if (usesConstantBus(MRI, MO, getOpSize(Opcode, OpIdx))) {
|
|
if (MO.isReg()) {
|
|
if (MO.getReg() != SGPRUsed)
|
|
++ConstantBusCount;
|
|
SGPRUsed = MO.getReg();
|
|
} else {
|
|
++ConstantBusCount;
|
|
}
|
|
}
|
|
}
|
|
if (ConstantBusCount > 1) {
|
|
ErrInfo = "VOP* instruction uses the constant bus more than once";
|
|
return false;
|
|
}
|
|
}
|
|
|
|
// Verify misc. restrictions on specific instructions.
|
|
if (Desc.getOpcode() == AMDGPU::V_DIV_SCALE_F32 ||
|
|
Desc.getOpcode() == AMDGPU::V_DIV_SCALE_F64) {
|
|
const MachineOperand &Src0 = MI->getOperand(Src0Idx);
|
|
const MachineOperand &Src1 = MI->getOperand(Src1Idx);
|
|
const MachineOperand &Src2 = MI->getOperand(Src2Idx);
|
|
if (Src0.isReg() && Src1.isReg() && Src2.isReg()) {
|
|
if (!compareMachineOp(Src0, Src1) &&
|
|
!compareMachineOp(Src0, Src2)) {
|
|
ErrInfo = "v_div_scale_{f32|f64} require src0 = src1 or src2";
|
|
return false;
|
|
}
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
unsigned SIInstrInfo::getVALUOp(const MachineInstr &MI) {
|
|
switch (MI.getOpcode()) {
|
|
default: return AMDGPU::INSTRUCTION_LIST_END;
|
|
case AMDGPU::REG_SEQUENCE: return AMDGPU::REG_SEQUENCE;
|
|
case AMDGPU::COPY: return AMDGPU::COPY;
|
|
case AMDGPU::PHI: return AMDGPU::PHI;
|
|
case AMDGPU::INSERT_SUBREG: return AMDGPU::INSERT_SUBREG;
|
|
case AMDGPU::S_MOV_B32:
|
|
return MI.getOperand(1).isReg() ?
|
|
AMDGPU::COPY : AMDGPU::V_MOV_B32_e32;
|
|
case AMDGPU::S_ADD_I32:
|
|
case AMDGPU::S_ADD_U32: return AMDGPU::V_ADD_I32_e32;
|
|
case AMDGPU::S_ADDC_U32: return AMDGPU::V_ADDC_U32_e32;
|
|
case AMDGPU::S_SUB_I32:
|
|
case AMDGPU::S_SUB_U32: return AMDGPU::V_SUB_I32_e32;
|
|
case AMDGPU::S_SUBB_U32: return AMDGPU::V_SUBB_U32_e32;
|
|
case AMDGPU::S_MUL_I32: return AMDGPU::V_MUL_LO_I32;
|
|
case AMDGPU::S_AND_B32: return AMDGPU::V_AND_B32_e32;
|
|
case AMDGPU::S_OR_B32: return AMDGPU::V_OR_B32_e32;
|
|
case AMDGPU::S_XOR_B32: return AMDGPU::V_XOR_B32_e32;
|
|
case AMDGPU::S_MIN_I32: return AMDGPU::V_MIN_I32_e32;
|
|
case AMDGPU::S_MIN_U32: return AMDGPU::V_MIN_U32_e32;
|
|
case AMDGPU::S_MAX_I32: return AMDGPU::V_MAX_I32_e32;
|
|
case AMDGPU::S_MAX_U32: return AMDGPU::V_MAX_U32_e32;
|
|
case AMDGPU::S_ASHR_I32: return AMDGPU::V_ASHR_I32_e32;
|
|
case AMDGPU::S_ASHR_I64: return AMDGPU::V_ASHR_I64;
|
|
case AMDGPU::S_LSHL_B32: return AMDGPU::V_LSHL_B32_e32;
|
|
case AMDGPU::S_LSHL_B64: return AMDGPU::V_LSHL_B64;
|
|
case AMDGPU::S_LSHR_B32: return AMDGPU::V_LSHR_B32_e32;
|
|
case AMDGPU::S_LSHR_B64: return AMDGPU::V_LSHR_B64;
|
|
case AMDGPU::S_SEXT_I32_I8: return AMDGPU::V_BFE_I32;
|
|
case AMDGPU::S_SEXT_I32_I16: return AMDGPU::V_BFE_I32;
|
|
case AMDGPU::S_BFE_U32: return AMDGPU::V_BFE_U32;
|
|
case AMDGPU::S_BFE_I32: return AMDGPU::V_BFE_I32;
|
|
case AMDGPU::S_BFM_B32: return AMDGPU::V_BFM_B32_e64;
|
|
case AMDGPU::S_BREV_B32: return AMDGPU::V_BFREV_B32_e32;
|
|
case AMDGPU::S_NOT_B32: return AMDGPU::V_NOT_B32_e32;
|
|
case AMDGPU::S_NOT_B64: return AMDGPU::V_NOT_B32_e32;
|
|
case AMDGPU::S_CMP_EQ_I32: return AMDGPU::V_CMP_EQ_I32_e32;
|
|
case AMDGPU::S_CMP_LG_I32: return AMDGPU::V_CMP_NE_I32_e32;
|
|
case AMDGPU::S_CMP_GT_I32: return AMDGPU::V_CMP_GT_I32_e32;
|
|
case AMDGPU::S_CMP_GE_I32: return AMDGPU::V_CMP_GE_I32_e32;
|
|
case AMDGPU::S_CMP_LT_I32: return AMDGPU::V_CMP_LT_I32_e32;
|
|
case AMDGPU::S_CMP_LE_I32: return AMDGPU::V_CMP_LE_I32_e32;
|
|
case AMDGPU::S_LOAD_DWORD_IMM:
|
|
case AMDGPU::S_LOAD_DWORD_SGPR: return AMDGPU::BUFFER_LOAD_DWORD_ADDR64;
|
|
case AMDGPU::S_LOAD_DWORDX2_IMM:
|
|
case AMDGPU::S_LOAD_DWORDX2_SGPR: return AMDGPU::BUFFER_LOAD_DWORDX2_ADDR64;
|
|
case AMDGPU::S_LOAD_DWORDX4_IMM:
|
|
case AMDGPU::S_LOAD_DWORDX4_SGPR: return AMDGPU::BUFFER_LOAD_DWORDX4_ADDR64;
|
|
case AMDGPU::S_BCNT1_I32_B32: return AMDGPU::V_BCNT_U32_B32_e64;
|
|
case AMDGPU::S_FF1_I32_B32: return AMDGPU::V_FFBL_B32_e32;
|
|
case AMDGPU::S_FLBIT_I32_B32: return AMDGPU::V_FFBH_U32_e32;
|
|
case AMDGPU::S_FLBIT_I32: return AMDGPU::V_FFBH_I32_e64;
|
|
}
|
|
}
|
|
|
|
bool SIInstrInfo::isSALUOpSupportedOnVALU(const MachineInstr &MI) const {
|
|
return getVALUOp(MI) != AMDGPU::INSTRUCTION_LIST_END;
|
|
}
|
|
|
|
const TargetRegisterClass *SIInstrInfo::getOpRegClass(const MachineInstr &MI,
|
|
unsigned OpNo) const {
|
|
const MachineRegisterInfo &MRI = MI.getParent()->getParent()->getRegInfo();
|
|
const MCInstrDesc &Desc = get(MI.getOpcode());
|
|
if (MI.isVariadic() || OpNo >= Desc.getNumOperands() ||
|
|
Desc.OpInfo[OpNo].RegClass == -1) {
|
|
unsigned Reg = MI.getOperand(OpNo).getReg();
|
|
|
|
if (TargetRegisterInfo::isVirtualRegister(Reg))
|
|
return MRI.getRegClass(Reg);
|
|
return RI.getPhysRegClass(Reg);
|
|
}
|
|
|
|
unsigned RCID = Desc.OpInfo[OpNo].RegClass;
|
|
return RI.getRegClass(RCID);
|
|
}
|
|
|
|
bool SIInstrInfo::canReadVGPR(const MachineInstr &MI, unsigned OpNo) const {
|
|
switch (MI.getOpcode()) {
|
|
case AMDGPU::COPY:
|
|
case AMDGPU::REG_SEQUENCE:
|
|
case AMDGPU::PHI:
|
|
case AMDGPU::INSERT_SUBREG:
|
|
return RI.hasVGPRs(getOpRegClass(MI, 0));
|
|
default:
|
|
return RI.hasVGPRs(getOpRegClass(MI, OpNo));
|
|
}
|
|
}
|
|
|
|
void SIInstrInfo::legalizeOpWithMove(MachineInstr *MI, unsigned OpIdx) const {
|
|
MachineBasicBlock::iterator I = MI;
|
|
MachineBasicBlock *MBB = MI->getParent();
|
|
MachineOperand &MO = MI->getOperand(OpIdx);
|
|
MachineRegisterInfo &MRI = MBB->getParent()->getRegInfo();
|
|
unsigned RCID = get(MI->getOpcode()).OpInfo[OpIdx].RegClass;
|
|
const TargetRegisterClass *RC = RI.getRegClass(RCID);
|
|
unsigned Opcode = AMDGPU::V_MOV_B32_e32;
|
|
if (MO.isReg())
|
|
Opcode = AMDGPU::COPY;
|
|
else if (RI.isSGPRClass(RC))
|
|
Opcode = AMDGPU::S_MOV_B32;
|
|
|
|
|
|
const TargetRegisterClass *VRC = RI.getEquivalentVGPRClass(RC);
|
|
if (RI.getCommonSubClass(&AMDGPU::VReg_64RegClass, VRC))
|
|
VRC = &AMDGPU::VReg_64RegClass;
|
|
else
|
|
VRC = &AMDGPU::VGPR_32RegClass;
|
|
|
|
unsigned Reg = MRI.createVirtualRegister(VRC);
|
|
DebugLoc DL = MBB->findDebugLoc(I);
|
|
BuildMI(*MI->getParent(), I, DL, get(Opcode), Reg)
|
|
.addOperand(MO);
|
|
MO.ChangeToRegister(Reg, false);
|
|
}
|
|
|
|
unsigned SIInstrInfo::buildExtractSubReg(MachineBasicBlock::iterator MI,
|
|
MachineRegisterInfo &MRI,
|
|
MachineOperand &SuperReg,
|
|
const TargetRegisterClass *SuperRC,
|
|
unsigned SubIdx,
|
|
const TargetRegisterClass *SubRC)
|
|
const {
|
|
assert(SuperReg.isReg());
|
|
|
|
unsigned NewSuperReg = MRI.createVirtualRegister(SuperRC);
|
|
unsigned SubReg = MRI.createVirtualRegister(SubRC);
|
|
|
|
// Just in case the super register is itself a sub-register, copy it to a new
|
|
// value so we don't need to worry about merging its subreg index with the
|
|
// SubIdx passed to this function. The register coalescer should be able to
|
|
// eliminate this extra copy.
|
|
MachineBasicBlock *MBB = MI->getParent();
|
|
DebugLoc DL = MI->getDebugLoc();
|
|
|
|
BuildMI(*MBB, MI, DL, get(TargetOpcode::COPY), NewSuperReg)
|
|
.addReg(SuperReg.getReg(), 0, SuperReg.getSubReg());
|
|
|
|
BuildMI(*MBB, MI, DL, get(TargetOpcode::COPY), SubReg)
|
|
.addReg(NewSuperReg, 0, SubIdx);
|
|
|
|
return SubReg;
|
|
}
|
|
|
|
MachineOperand SIInstrInfo::buildExtractSubRegOrImm(
|
|
MachineBasicBlock::iterator MII,
|
|
MachineRegisterInfo &MRI,
|
|
MachineOperand &Op,
|
|
const TargetRegisterClass *SuperRC,
|
|
unsigned SubIdx,
|
|
const TargetRegisterClass *SubRC) const {
|
|
if (Op.isImm()) {
|
|
// XXX - Is there a better way to do this?
|
|
if (SubIdx == AMDGPU::sub0)
|
|
return MachineOperand::CreateImm(Op.getImm() & 0xFFFFFFFF);
|
|
if (SubIdx == AMDGPU::sub1)
|
|
return MachineOperand::CreateImm(Op.getImm() >> 32);
|
|
|
|
llvm_unreachable("Unhandled register index for immediate");
|
|
}
|
|
|
|
unsigned SubReg = buildExtractSubReg(MII, MRI, Op, SuperRC,
|
|
SubIdx, SubRC);
|
|
return MachineOperand::CreateReg(SubReg, false);
|
|
}
|
|
|
|
unsigned SIInstrInfo::split64BitImm(SmallVectorImpl<MachineInstr *> &Worklist,
|
|
MachineBasicBlock::iterator MI,
|
|
MachineRegisterInfo &MRI,
|
|
const TargetRegisterClass *RC,
|
|
const MachineOperand &Op) const {
|
|
MachineBasicBlock *MBB = MI->getParent();
|
|
DebugLoc DL = MI->getDebugLoc();
|
|
unsigned LoDst = MRI.createVirtualRegister(&AMDGPU::SGPR_32RegClass);
|
|
unsigned HiDst = MRI.createVirtualRegister(&AMDGPU::SGPR_32RegClass);
|
|
unsigned Dst = MRI.createVirtualRegister(RC);
|
|
|
|
MachineInstr *Lo = BuildMI(*MBB, MI, DL, get(AMDGPU::S_MOV_B32),
|
|
LoDst)
|
|
.addImm(Op.getImm() & 0xFFFFFFFF);
|
|
MachineInstr *Hi = BuildMI(*MBB, MI, DL, get(AMDGPU::S_MOV_B32),
|
|
HiDst)
|
|
.addImm(Op.getImm() >> 32);
|
|
|
|
BuildMI(*MBB, MI, DL, get(TargetOpcode::REG_SEQUENCE), Dst)
|
|
.addReg(LoDst)
|
|
.addImm(AMDGPU::sub0)
|
|
.addReg(HiDst)
|
|
.addImm(AMDGPU::sub1);
|
|
|
|
Worklist.push_back(Lo);
|
|
Worklist.push_back(Hi);
|
|
|
|
return Dst;
|
|
}
|
|
|
|
// Change the order of operands from (0, 1, 2) to (0, 2, 1)
|
|
void SIInstrInfo::swapOperands(MachineBasicBlock::iterator Inst) const {
|
|
assert(Inst->getNumExplicitOperands() == 3);
|
|
MachineOperand Op1 = Inst->getOperand(1);
|
|
Inst->RemoveOperand(1);
|
|
Inst->addOperand(Op1);
|
|
}
|
|
|
|
bool SIInstrInfo::isOperandLegal(const MachineInstr *MI, unsigned OpIdx,
|
|
const MachineOperand *MO) const {
|
|
const MachineRegisterInfo &MRI = MI->getParent()->getParent()->getRegInfo();
|
|
const MCInstrDesc &InstDesc = get(MI->getOpcode());
|
|
const MCOperandInfo &OpInfo = InstDesc.OpInfo[OpIdx];
|
|
const TargetRegisterClass *DefinedRC =
|
|
OpInfo.RegClass != -1 ? RI.getRegClass(OpInfo.RegClass) : nullptr;
|
|
if (!MO)
|
|
MO = &MI->getOperand(OpIdx);
|
|
|
|
if (isVALU(InstDesc.Opcode) &&
|
|
usesConstantBus(MRI, *MO, DefinedRC->getSize())) {
|
|
unsigned SGPRUsed =
|
|
MO->isReg() ? MO->getReg() : (unsigned)AMDGPU::NoRegister;
|
|
for (unsigned i = 0, e = MI->getNumOperands(); i != e; ++i) {
|
|
if (i == OpIdx)
|
|
continue;
|
|
const MachineOperand &Op = MI->getOperand(i);
|
|
if (Op.isReg() && Op.getReg() != SGPRUsed &&
|
|
usesConstantBus(MRI, Op, getOpSize(*MI, i))) {
|
|
return false;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (MO->isReg()) {
|
|
assert(DefinedRC);
|
|
const TargetRegisterClass *RC = MRI.getRegClass(MO->getReg());
|
|
|
|
// In order to be legal, the common sub-class must be equal to the
|
|
// class of the current operand. For example:
|
|
//
|
|
// v_mov_b32 s0 ; Operand defined as vsrc_32
|
|
// ; RI.getCommonSubClass(s0,vsrc_32) = sgpr ; LEGAL
|
|
//
|
|
// s_sendmsg 0, s0 ; Operand defined as m0reg
|
|
// ; RI.getCommonSubClass(s0,m0reg) = m0reg ; NOT LEGAL
|
|
|
|
return RI.getCommonSubClass(RC, RI.getRegClass(OpInfo.RegClass)) == RC;
|
|
}
|
|
|
|
|
|
// Handle non-register types that are treated like immediates.
|
|
assert(MO->isImm() || MO->isTargetIndex() || MO->isFI());
|
|
|
|
if (!DefinedRC) {
|
|
// This operand expects an immediate.
|
|
return true;
|
|
}
|
|
|
|
return isImmOperandLegal(MI, OpIdx, *MO);
|
|
}
|
|
|
|
void SIInstrInfo::legalizeOperands(MachineInstr *MI) const {
|
|
MachineRegisterInfo &MRI = MI->getParent()->getParent()->getRegInfo();
|
|
|
|
int Src0Idx = AMDGPU::getNamedOperandIdx(MI->getOpcode(),
|
|
AMDGPU::OpName::src0);
|
|
int Src1Idx = AMDGPU::getNamedOperandIdx(MI->getOpcode(),
|
|
AMDGPU::OpName::src1);
|
|
int Src2Idx = AMDGPU::getNamedOperandIdx(MI->getOpcode(),
|
|
AMDGPU::OpName::src2);
|
|
|
|
// Legalize VOP2
|
|
if (isVOP2(MI->getOpcode()) && Src1Idx != -1) {
|
|
// Legalize src0
|
|
if (!isOperandLegal(MI, Src0Idx))
|
|
legalizeOpWithMove(MI, Src0Idx);
|
|
|
|
// Legalize src1
|
|
if (isOperandLegal(MI, Src1Idx))
|
|
return;
|
|
|
|
// Usually src0 of VOP2 instructions allow more types of inputs
|
|
// than src1, so try to commute the instruction to decrease our
|
|
// chances of having to insert a MOV instruction to legalize src1.
|
|
if (MI->isCommutable()) {
|
|
if (commuteInstruction(MI))
|
|
// If we are successful in commuting, then we know MI is legal, so
|
|
// we are done.
|
|
return;
|
|
}
|
|
|
|
legalizeOpWithMove(MI, Src1Idx);
|
|
return;
|
|
}
|
|
|
|
// XXX - Do any VOP3 instructions read VCC?
|
|
// Legalize VOP3
|
|
if (isVOP3(MI->getOpcode())) {
|
|
int VOP3Idx[3] = { Src0Idx, Src1Idx, Src2Idx };
|
|
|
|
// Find the one SGPR operand we are allowed to use.
|
|
unsigned SGPRReg = findUsedSGPR(MI, VOP3Idx);
|
|
|
|
for (unsigned i = 0; i < 3; ++i) {
|
|
int Idx = VOP3Idx[i];
|
|
if (Idx == -1)
|
|
break;
|
|
MachineOperand &MO = MI->getOperand(Idx);
|
|
|
|
if (MO.isReg()) {
|
|
if (!RI.isSGPRClass(MRI.getRegClass(MO.getReg())))
|
|
continue; // VGPRs are legal
|
|
|
|
assert(MO.getReg() != AMDGPU::SCC && "SCC operand to VOP3 instruction");
|
|
|
|
if (SGPRReg == AMDGPU::NoRegister || SGPRReg == MO.getReg()) {
|
|
SGPRReg = MO.getReg();
|
|
// We can use one SGPR in each VOP3 instruction.
|
|
continue;
|
|
}
|
|
} else if (!isLiteralConstant(MO, getOpSize(MI->getOpcode(), Idx))) {
|
|
// If it is not a register and not a literal constant, then it must be
|
|
// an inline constant which is always legal.
|
|
continue;
|
|
}
|
|
// If we make it this far, then the operand is not legal and we must
|
|
// legalize it.
|
|
legalizeOpWithMove(MI, Idx);
|
|
}
|
|
}
|
|
|
|
// Legalize REG_SEQUENCE and PHI
|
|
// The register class of the operands much be the same type as the register
|
|
// class of the output.
|
|
if (MI->getOpcode() == AMDGPU::REG_SEQUENCE ||
|
|
MI->getOpcode() == AMDGPU::PHI) {
|
|
const TargetRegisterClass *RC = nullptr, *SRC = nullptr, *VRC = nullptr;
|
|
for (unsigned i = 1, e = MI->getNumOperands(); i != e; i+=2) {
|
|
if (!MI->getOperand(i).isReg() ||
|
|
!TargetRegisterInfo::isVirtualRegister(MI->getOperand(i).getReg()))
|
|
continue;
|
|
const TargetRegisterClass *OpRC =
|
|
MRI.getRegClass(MI->getOperand(i).getReg());
|
|
if (RI.hasVGPRs(OpRC)) {
|
|
VRC = OpRC;
|
|
} else {
|
|
SRC = OpRC;
|
|
}
|
|
}
|
|
|
|
// If any of the operands are VGPR registers, then they all most be
|
|
// otherwise we will create illegal VGPR->SGPR copies when legalizing
|
|
// them.
|
|
if (VRC || !RI.isSGPRClass(getOpRegClass(*MI, 0))) {
|
|
if (!VRC) {
|
|
assert(SRC);
|
|
VRC = RI.getEquivalentVGPRClass(SRC);
|
|
}
|
|
RC = VRC;
|
|
} else {
|
|
RC = SRC;
|
|
}
|
|
|
|
// Update all the operands so they have the same type.
|
|
for (unsigned i = 1, e = MI->getNumOperands(); i != e; i+=2) {
|
|
if (!MI->getOperand(i).isReg() ||
|
|
!TargetRegisterInfo::isVirtualRegister(MI->getOperand(i).getReg()))
|
|
continue;
|
|
unsigned DstReg = MRI.createVirtualRegister(RC);
|
|
MachineBasicBlock *InsertBB;
|
|
MachineBasicBlock::iterator Insert;
|
|
if (MI->getOpcode() == AMDGPU::REG_SEQUENCE) {
|
|
InsertBB = MI->getParent();
|
|
Insert = MI;
|
|
} else {
|
|
// MI is a PHI instruction.
|
|
InsertBB = MI->getOperand(i + 1).getMBB();
|
|
Insert = InsertBB->getFirstTerminator();
|
|
}
|
|
BuildMI(*InsertBB, Insert, MI->getDebugLoc(),
|
|
get(AMDGPU::COPY), DstReg)
|
|
.addOperand(MI->getOperand(i));
|
|
MI->getOperand(i).setReg(DstReg);
|
|
}
|
|
}
|
|
|
|
// Legalize INSERT_SUBREG
|
|
// src0 must have the same register class as dst
|
|
if (MI->getOpcode() == AMDGPU::INSERT_SUBREG) {
|
|
unsigned Dst = MI->getOperand(0).getReg();
|
|
unsigned Src0 = MI->getOperand(1).getReg();
|
|
const TargetRegisterClass *DstRC = MRI.getRegClass(Dst);
|
|
const TargetRegisterClass *Src0RC = MRI.getRegClass(Src0);
|
|
if (DstRC != Src0RC) {
|
|
MachineBasicBlock &MBB = *MI->getParent();
|
|
unsigned NewSrc0 = MRI.createVirtualRegister(DstRC);
|
|
BuildMI(MBB, MI, MI->getDebugLoc(), get(AMDGPU::COPY), NewSrc0)
|
|
.addReg(Src0);
|
|
MI->getOperand(1).setReg(NewSrc0);
|
|
}
|
|
return;
|
|
}
|
|
|
|
// Legalize MUBUF* instructions
|
|
// FIXME: If we start using the non-addr64 instructions for compute, we
|
|
// may need to legalize them here.
|
|
int SRsrcIdx =
|
|
AMDGPU::getNamedOperandIdx(MI->getOpcode(), AMDGPU::OpName::srsrc);
|
|
if (SRsrcIdx != -1) {
|
|
// We have an MUBUF instruction
|
|
MachineOperand *SRsrc = &MI->getOperand(SRsrcIdx);
|
|
unsigned SRsrcRC = get(MI->getOpcode()).OpInfo[SRsrcIdx].RegClass;
|
|
if (RI.getCommonSubClass(MRI.getRegClass(SRsrc->getReg()),
|
|
RI.getRegClass(SRsrcRC))) {
|
|
// The operands are legal.
|
|
// FIXME: We may need to legalize operands besided srsrc.
|
|
return;
|
|
}
|
|
|
|
MachineBasicBlock &MBB = *MI->getParent();
|
|
// Extract the the ptr from the resource descriptor.
|
|
|
|
// SRsrcPtrLo = srsrc:sub0
|
|
unsigned SRsrcPtrLo = buildExtractSubReg(MI, MRI, *SRsrc,
|
|
&AMDGPU::VReg_128RegClass, AMDGPU::sub0, &AMDGPU::VGPR_32RegClass);
|
|
|
|
// SRsrcPtrHi = srsrc:sub1
|
|
unsigned SRsrcPtrHi = buildExtractSubReg(MI, MRI, *SRsrc,
|
|
&AMDGPU::VReg_128RegClass, AMDGPU::sub1, &AMDGPU::VGPR_32RegClass);
|
|
|
|
// Create an empty resource descriptor
|
|
unsigned Zero64 = MRI.createVirtualRegister(&AMDGPU::SReg_64RegClass);
|
|
unsigned SRsrcFormatLo = MRI.createVirtualRegister(&AMDGPU::SGPR_32RegClass);
|
|
unsigned SRsrcFormatHi = MRI.createVirtualRegister(&AMDGPU::SGPR_32RegClass);
|
|
unsigned NewSRsrc = MRI.createVirtualRegister(&AMDGPU::SReg_128RegClass);
|
|
uint64_t RsrcDataFormat = getDefaultRsrcDataFormat();
|
|
|
|
// Zero64 = 0
|
|
BuildMI(MBB, MI, MI->getDebugLoc(), get(AMDGPU::S_MOV_B64),
|
|
Zero64)
|
|
.addImm(0);
|
|
|
|
// SRsrcFormatLo = RSRC_DATA_FORMAT{31-0}
|
|
BuildMI(MBB, MI, MI->getDebugLoc(), get(AMDGPU::S_MOV_B32),
|
|
SRsrcFormatLo)
|
|
.addImm(RsrcDataFormat & 0xFFFFFFFF);
|
|
|
|
// SRsrcFormatHi = RSRC_DATA_FORMAT{63-32}
|
|
BuildMI(MBB, MI, MI->getDebugLoc(), get(AMDGPU::S_MOV_B32),
|
|
SRsrcFormatHi)
|
|
.addImm(RsrcDataFormat >> 32);
|
|
|
|
// NewSRsrc = {Zero64, SRsrcFormat}
|
|
BuildMI(MBB, MI, MI->getDebugLoc(), get(AMDGPU::REG_SEQUENCE),
|
|
NewSRsrc)
|
|
.addReg(Zero64)
|
|
.addImm(AMDGPU::sub0_sub1)
|
|
.addReg(SRsrcFormatLo)
|
|
.addImm(AMDGPU::sub2)
|
|
.addReg(SRsrcFormatHi)
|
|
.addImm(AMDGPU::sub3);
|
|
|
|
MachineOperand *VAddr = getNamedOperand(*MI, AMDGPU::OpName::vaddr);
|
|
unsigned NewVAddr = MRI.createVirtualRegister(&AMDGPU::VReg_64RegClass);
|
|
unsigned NewVAddrLo;
|
|
unsigned NewVAddrHi;
|
|
if (VAddr) {
|
|
// This is already an ADDR64 instruction so we need to add the pointer
|
|
// extracted from the resource descriptor to the current value of VAddr.
|
|
NewVAddrLo = MRI.createVirtualRegister(&AMDGPU::VGPR_32RegClass);
|
|
NewVAddrHi = MRI.createVirtualRegister(&AMDGPU::VGPR_32RegClass);
|
|
|
|
// NewVaddrLo = SRsrcPtrLo + VAddr:sub0
|
|
BuildMI(MBB, MI, MI->getDebugLoc(), get(AMDGPU::V_ADD_I32_e32),
|
|
NewVAddrLo)
|
|
.addReg(SRsrcPtrLo)
|
|
.addReg(VAddr->getReg(), 0, AMDGPU::sub0)
|
|
.addReg(AMDGPU::VCC, RegState::ImplicitDefine);
|
|
|
|
// NewVaddrHi = SRsrcPtrHi + VAddr:sub1
|
|
BuildMI(MBB, MI, MI->getDebugLoc(), get(AMDGPU::V_ADDC_U32_e32),
|
|
NewVAddrHi)
|
|
.addReg(SRsrcPtrHi)
|
|
.addReg(VAddr->getReg(), 0, AMDGPU::sub1)
|
|
.addReg(AMDGPU::VCC, RegState::ImplicitDefine)
|
|
.addReg(AMDGPU::VCC, RegState::Implicit);
|
|
|
|
} else {
|
|
// This instructions is the _OFFSET variant, so we need to convert it to
|
|
// ADDR64.
|
|
MachineOperand *VData = getNamedOperand(*MI, AMDGPU::OpName::vdata);
|
|
MachineOperand *Offset = getNamedOperand(*MI, AMDGPU::OpName::offset);
|
|
MachineOperand *SOffset = getNamedOperand(*MI, AMDGPU::OpName::soffset);
|
|
|
|
// Create the new instruction.
|
|
unsigned Addr64Opcode = AMDGPU::getAddr64Inst(MI->getOpcode());
|
|
MachineInstr *Addr64 =
|
|
BuildMI(MBB, MI, MI->getDebugLoc(), get(Addr64Opcode))
|
|
.addOperand(*VData)
|
|
.addReg(AMDGPU::NoRegister) // Dummy value for vaddr.
|
|
// This will be replaced later
|
|
// with the new value of vaddr.
|
|
.addOperand(*SRsrc)
|
|
.addOperand(*SOffset)
|
|
.addOperand(*Offset)
|
|
.addImm(0) // glc
|
|
.addImm(0) // slc
|
|
.addImm(0); // tfe
|
|
|
|
MI->removeFromParent();
|
|
MI = Addr64;
|
|
|
|
NewVAddrLo = SRsrcPtrLo;
|
|
NewVAddrHi = SRsrcPtrHi;
|
|
VAddr = getNamedOperand(*MI, AMDGPU::OpName::vaddr);
|
|
SRsrc = getNamedOperand(*MI, AMDGPU::OpName::srsrc);
|
|
}
|
|
|
|
// NewVaddr = {NewVaddrHi, NewVaddrLo}
|
|
BuildMI(MBB, MI, MI->getDebugLoc(), get(AMDGPU::REG_SEQUENCE),
|
|
NewVAddr)
|
|
.addReg(NewVAddrLo)
|
|
.addImm(AMDGPU::sub0)
|
|
.addReg(NewVAddrHi)
|
|
.addImm(AMDGPU::sub1);
|
|
|
|
|
|
// Update the instruction to use NewVaddr
|
|
VAddr->setReg(NewVAddr);
|
|
// Update the instruction to use NewSRsrc
|
|
SRsrc->setReg(NewSRsrc);
|
|
}
|
|
}
|
|
|
|
void SIInstrInfo::splitSMRD(MachineInstr *MI,
|
|
const TargetRegisterClass *HalfRC,
|
|
unsigned HalfImmOp, unsigned HalfSGPROp,
|
|
MachineInstr *&Lo, MachineInstr *&Hi) const {
|
|
|
|
DebugLoc DL = MI->getDebugLoc();
|
|
MachineBasicBlock *MBB = MI->getParent();
|
|
MachineRegisterInfo &MRI = MBB->getParent()->getRegInfo();
|
|
unsigned RegLo = MRI.createVirtualRegister(HalfRC);
|
|
unsigned RegHi = MRI.createVirtualRegister(HalfRC);
|
|
unsigned HalfSize = HalfRC->getSize();
|
|
const MachineOperand *OffOp =
|
|
getNamedOperand(*MI, AMDGPU::OpName::offset);
|
|
const MachineOperand *SBase = getNamedOperand(*MI, AMDGPU::OpName::sbase);
|
|
|
|
// The SMRD has an 8-bit offset in dwords on SI and a 20-bit offset in bytes
|
|
// on VI.
|
|
|
|
bool IsKill = SBase->isKill();
|
|
if (OffOp) {
|
|
bool isVI =
|
|
MBB->getParent()->getSubtarget<AMDGPUSubtarget>().getGeneration() >=
|
|
AMDGPUSubtarget::VOLCANIC_ISLANDS;
|
|
unsigned OffScale = isVI ? 1 : 4;
|
|
// Handle the _IMM variant
|
|
unsigned LoOffset = OffOp->getImm() * OffScale;
|
|
unsigned HiOffset = LoOffset + HalfSize;
|
|
Lo = BuildMI(*MBB, MI, DL, get(HalfImmOp), RegLo)
|
|
// Use addReg instead of addOperand
|
|
// to make sure kill flag is cleared.
|
|
.addReg(SBase->getReg(), 0, SBase->getSubReg())
|
|
.addImm(LoOffset / OffScale);
|
|
|
|
if (!isUInt<20>(HiOffset) || (!isVI && !isUInt<8>(HiOffset / OffScale))) {
|
|
unsigned OffsetSGPR =
|
|
MRI.createVirtualRegister(&AMDGPU::SReg_32RegClass);
|
|
BuildMI(*MBB, MI, DL, get(AMDGPU::S_MOV_B32), OffsetSGPR)
|
|
.addImm(HiOffset); // The offset in register is in bytes.
|
|
Hi = BuildMI(*MBB, MI, DL, get(HalfSGPROp), RegHi)
|
|
.addReg(SBase->getReg(), getKillRegState(IsKill),
|
|
SBase->getSubReg())
|
|
.addReg(OffsetSGPR);
|
|
} else {
|
|
Hi = BuildMI(*MBB, MI, DL, get(HalfImmOp), RegHi)
|
|
.addReg(SBase->getReg(), getKillRegState(IsKill),
|
|
SBase->getSubReg())
|
|
.addImm(HiOffset / OffScale);
|
|
}
|
|
} else {
|
|
// Handle the _SGPR variant
|
|
MachineOperand *SOff = getNamedOperand(*MI, AMDGPU::OpName::soff);
|
|
Lo = BuildMI(*MBB, MI, DL, get(HalfSGPROp), RegLo)
|
|
.addReg(SBase->getReg(), 0, SBase->getSubReg())
|
|
.addOperand(*SOff);
|
|
unsigned OffsetSGPR = MRI.createVirtualRegister(&AMDGPU::SReg_32RegClass);
|
|
BuildMI(*MBB, MI, DL, get(AMDGPU::S_ADD_I32), OffsetSGPR)
|
|
.addOperand(*SOff)
|
|
.addImm(HalfSize);
|
|
Hi = BuildMI(*MBB, MI, DL, get(HalfSGPROp))
|
|
.addReg(SBase->getReg(), getKillRegState(IsKill),
|
|
SBase->getSubReg())
|
|
.addReg(OffsetSGPR);
|
|
}
|
|
|
|
unsigned SubLo, SubHi;
|
|
switch (HalfSize) {
|
|
case 4:
|
|
SubLo = AMDGPU::sub0;
|
|
SubHi = AMDGPU::sub1;
|
|
break;
|
|
case 8:
|
|
SubLo = AMDGPU::sub0_sub1;
|
|
SubHi = AMDGPU::sub2_sub3;
|
|
break;
|
|
case 16:
|
|
SubLo = AMDGPU::sub0_sub1_sub2_sub3;
|
|
SubHi = AMDGPU::sub4_sub5_sub6_sub7;
|
|
break;
|
|
case 32:
|
|
SubLo = AMDGPU::sub0_sub1_sub2_sub3_sub4_sub5_sub6_sub7;
|
|
SubHi = AMDGPU::sub8_sub9_sub10_sub11_sub12_sub13_sub14_sub15;
|
|
break;
|
|
default:
|
|
llvm_unreachable("Unhandled HalfSize");
|
|
}
|
|
|
|
BuildMI(*MBB, MI, DL, get(AMDGPU::REG_SEQUENCE))
|
|
.addOperand(MI->getOperand(0))
|
|
.addReg(RegLo)
|
|
.addImm(SubLo)
|
|
.addReg(RegHi)
|
|
.addImm(SubHi);
|
|
}
|
|
|
|
void SIInstrInfo::moveSMRDToVALU(MachineInstr *MI, MachineRegisterInfo &MRI) const {
|
|
MachineBasicBlock *MBB = MI->getParent();
|
|
switch (MI->getOpcode()) {
|
|
case AMDGPU::S_LOAD_DWORD_IMM:
|
|
case AMDGPU::S_LOAD_DWORD_SGPR:
|
|
case AMDGPU::S_LOAD_DWORDX2_IMM:
|
|
case AMDGPU::S_LOAD_DWORDX2_SGPR:
|
|
case AMDGPU::S_LOAD_DWORDX4_IMM:
|
|
case AMDGPU::S_LOAD_DWORDX4_SGPR: {
|
|
unsigned NewOpcode = getVALUOp(*MI);
|
|
unsigned RegOffset;
|
|
unsigned ImmOffset;
|
|
|
|
if (MI->getOperand(2).isReg()) {
|
|
RegOffset = MI->getOperand(2).getReg();
|
|
ImmOffset = 0;
|
|
} else {
|
|
assert(MI->getOperand(2).isImm());
|
|
// SMRD instructions take a dword offsets on SI and byte offset on VI
|
|
// and MUBUF instructions always take a byte offset.
|
|
ImmOffset = MI->getOperand(2).getImm();
|
|
if (MBB->getParent()->getSubtarget<AMDGPUSubtarget>().getGeneration() <=
|
|
AMDGPUSubtarget::SEA_ISLANDS)
|
|
ImmOffset <<= 2;
|
|
RegOffset = MRI.createVirtualRegister(&AMDGPU::SGPR_32RegClass);
|
|
|
|
if (isUInt<12>(ImmOffset)) {
|
|
BuildMI(*MBB, MI, MI->getDebugLoc(), get(AMDGPU::S_MOV_B32),
|
|
RegOffset)
|
|
.addImm(0);
|
|
} else {
|
|
BuildMI(*MBB, MI, MI->getDebugLoc(), get(AMDGPU::S_MOV_B32),
|
|
RegOffset)
|
|
.addImm(ImmOffset);
|
|
ImmOffset = 0;
|
|
}
|
|
}
|
|
|
|
unsigned SRsrc = MRI.createVirtualRegister(&AMDGPU::SReg_128RegClass);
|
|
unsigned DWord0 = RegOffset;
|
|
unsigned DWord1 = MRI.createVirtualRegister(&AMDGPU::SGPR_32RegClass);
|
|
unsigned DWord2 = MRI.createVirtualRegister(&AMDGPU::SGPR_32RegClass);
|
|
unsigned DWord3 = MRI.createVirtualRegister(&AMDGPU::SGPR_32RegClass);
|
|
uint64_t RsrcDataFormat = getDefaultRsrcDataFormat();
|
|
|
|
BuildMI(*MBB, MI, MI->getDebugLoc(), get(AMDGPU::S_MOV_B32), DWord1)
|
|
.addImm(0);
|
|
BuildMI(*MBB, MI, MI->getDebugLoc(), get(AMDGPU::S_MOV_B32), DWord2)
|
|
.addImm(RsrcDataFormat & 0xFFFFFFFF);
|
|
BuildMI(*MBB, MI, MI->getDebugLoc(), get(AMDGPU::S_MOV_B32), DWord3)
|
|
.addImm(RsrcDataFormat >> 32);
|
|
BuildMI(*MBB, MI, MI->getDebugLoc(), get(AMDGPU::REG_SEQUENCE), SRsrc)
|
|
.addReg(DWord0)
|
|
.addImm(AMDGPU::sub0)
|
|
.addReg(DWord1)
|
|
.addImm(AMDGPU::sub1)
|
|
.addReg(DWord2)
|
|
.addImm(AMDGPU::sub2)
|
|
.addReg(DWord3)
|
|
.addImm(AMDGPU::sub3);
|
|
MI->setDesc(get(NewOpcode));
|
|
if (MI->getOperand(2).isReg()) {
|
|
MI->getOperand(2).setReg(SRsrc);
|
|
} else {
|
|
MI->getOperand(2).ChangeToRegister(SRsrc, false);
|
|
}
|
|
MI->addOperand(*MBB->getParent(), MachineOperand::CreateImm(0));
|
|
MI->addOperand(*MBB->getParent(), MachineOperand::CreateImm(ImmOffset));
|
|
MI->addOperand(*MBB->getParent(), MachineOperand::CreateImm(0)); // glc
|
|
MI->addOperand(*MBB->getParent(), MachineOperand::CreateImm(0)); // slc
|
|
MI->addOperand(*MBB->getParent(), MachineOperand::CreateImm(0)); // tfe
|
|
|
|
const TargetRegisterClass *NewDstRC =
|
|
RI.getRegClass(get(NewOpcode).OpInfo[0].RegClass);
|
|
|
|
unsigned DstReg = MI->getOperand(0).getReg();
|
|
unsigned NewDstReg = MRI.createVirtualRegister(NewDstRC);
|
|
MRI.replaceRegWith(DstReg, NewDstReg);
|
|
break;
|
|
}
|
|
case AMDGPU::S_LOAD_DWORDX8_IMM:
|
|
case AMDGPU::S_LOAD_DWORDX8_SGPR: {
|
|
MachineInstr *Lo, *Hi;
|
|
splitSMRD(MI, &AMDGPU::SReg_128RegClass, AMDGPU::S_LOAD_DWORDX4_IMM,
|
|
AMDGPU::S_LOAD_DWORDX4_SGPR, Lo, Hi);
|
|
MI->eraseFromParent();
|
|
moveSMRDToVALU(Lo, MRI);
|
|
moveSMRDToVALU(Hi, MRI);
|
|
break;
|
|
}
|
|
|
|
case AMDGPU::S_LOAD_DWORDX16_IMM:
|
|
case AMDGPU::S_LOAD_DWORDX16_SGPR: {
|
|
MachineInstr *Lo, *Hi;
|
|
splitSMRD(MI, &AMDGPU::SReg_256RegClass, AMDGPU::S_LOAD_DWORDX8_IMM,
|
|
AMDGPU::S_LOAD_DWORDX8_SGPR, Lo, Hi);
|
|
MI->eraseFromParent();
|
|
moveSMRDToVALU(Lo, MRI);
|
|
moveSMRDToVALU(Hi, MRI);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
void SIInstrInfo::moveToVALU(MachineInstr &TopInst) const {
|
|
SmallVector<MachineInstr *, 128> Worklist;
|
|
Worklist.push_back(&TopInst);
|
|
|
|
while (!Worklist.empty()) {
|
|
MachineInstr *Inst = Worklist.pop_back_val();
|
|
MachineBasicBlock *MBB = Inst->getParent();
|
|
MachineRegisterInfo &MRI = MBB->getParent()->getRegInfo();
|
|
|
|
unsigned Opcode = Inst->getOpcode();
|
|
unsigned NewOpcode = getVALUOp(*Inst);
|
|
|
|
// Handle some special cases
|
|
switch (Opcode) {
|
|
default:
|
|
if (isSMRD(Inst->getOpcode())) {
|
|
moveSMRDToVALU(Inst, MRI);
|
|
}
|
|
break;
|
|
case AMDGPU::S_MOV_B64: {
|
|
DebugLoc DL = Inst->getDebugLoc();
|
|
|
|
// If the source operand is a register we can replace this with a
|
|
// copy.
|
|
if (Inst->getOperand(1).isReg()) {
|
|
MachineInstr *Copy = BuildMI(*MBB, Inst, DL, get(TargetOpcode::COPY))
|
|
.addOperand(Inst->getOperand(0))
|
|
.addOperand(Inst->getOperand(1));
|
|
Worklist.push_back(Copy);
|
|
} else {
|
|
// Otherwise, we need to split this into two movs, because there is
|
|
// no 64-bit VALU move instruction.
|
|
unsigned Reg = Inst->getOperand(0).getReg();
|
|
unsigned Dst = split64BitImm(Worklist,
|
|
Inst,
|
|
MRI,
|
|
MRI.getRegClass(Reg),
|
|
Inst->getOperand(1));
|
|
MRI.replaceRegWith(Reg, Dst);
|
|
}
|
|
Inst->eraseFromParent();
|
|
continue;
|
|
}
|
|
case AMDGPU::S_AND_B64:
|
|
splitScalar64BitBinaryOp(Worklist, Inst, AMDGPU::S_AND_B32);
|
|
Inst->eraseFromParent();
|
|
continue;
|
|
|
|
case AMDGPU::S_OR_B64:
|
|
splitScalar64BitBinaryOp(Worklist, Inst, AMDGPU::S_OR_B32);
|
|
Inst->eraseFromParent();
|
|
continue;
|
|
|
|
case AMDGPU::S_XOR_B64:
|
|
splitScalar64BitBinaryOp(Worklist, Inst, AMDGPU::S_XOR_B32);
|
|
Inst->eraseFromParent();
|
|
continue;
|
|
|
|
case AMDGPU::S_NOT_B64:
|
|
splitScalar64BitUnaryOp(Worklist, Inst, AMDGPU::S_NOT_B32);
|
|
Inst->eraseFromParent();
|
|
continue;
|
|
|
|
case AMDGPU::S_BCNT1_I32_B64:
|
|
splitScalar64BitBCNT(Worklist, Inst);
|
|
Inst->eraseFromParent();
|
|
continue;
|
|
|
|
case AMDGPU::S_BFE_I64: {
|
|
splitScalar64BitBFE(Worklist, Inst);
|
|
Inst->eraseFromParent();
|
|
continue;
|
|
}
|
|
|
|
case AMDGPU::S_LSHL_B32:
|
|
if (ST.getGeneration() >= AMDGPUSubtarget::VOLCANIC_ISLANDS) {
|
|
NewOpcode = AMDGPU::V_LSHLREV_B32_e64;
|
|
swapOperands(Inst);
|
|
}
|
|
break;
|
|
case AMDGPU::S_ASHR_I32:
|
|
if (ST.getGeneration() >= AMDGPUSubtarget::VOLCANIC_ISLANDS) {
|
|
NewOpcode = AMDGPU::V_ASHRREV_I32_e64;
|
|
swapOperands(Inst);
|
|
}
|
|
break;
|
|
case AMDGPU::S_LSHR_B32:
|
|
if (ST.getGeneration() >= AMDGPUSubtarget::VOLCANIC_ISLANDS) {
|
|
NewOpcode = AMDGPU::V_LSHRREV_B32_e64;
|
|
swapOperands(Inst);
|
|
}
|
|
break;
|
|
case AMDGPU::S_LSHL_B64:
|
|
if (ST.getGeneration() >= AMDGPUSubtarget::VOLCANIC_ISLANDS) {
|
|
NewOpcode = AMDGPU::V_LSHLREV_B64;
|
|
swapOperands(Inst);
|
|
}
|
|
break;
|
|
case AMDGPU::S_ASHR_I64:
|
|
if (ST.getGeneration() >= AMDGPUSubtarget::VOLCANIC_ISLANDS) {
|
|
NewOpcode = AMDGPU::V_ASHRREV_I64;
|
|
swapOperands(Inst);
|
|
}
|
|
break;
|
|
case AMDGPU::S_LSHR_B64:
|
|
if (ST.getGeneration() >= AMDGPUSubtarget::VOLCANIC_ISLANDS) {
|
|
NewOpcode = AMDGPU::V_LSHRREV_B64;
|
|
swapOperands(Inst);
|
|
}
|
|
break;
|
|
|
|
case AMDGPU::S_BFE_U64:
|
|
case AMDGPU::S_BFM_B64:
|
|
llvm_unreachable("Moving this op to VALU not implemented");
|
|
}
|
|
|
|
if (NewOpcode == AMDGPU::INSTRUCTION_LIST_END) {
|
|
// We cannot move this instruction to the VALU, so we should try to
|
|
// legalize its operands instead.
|
|
legalizeOperands(Inst);
|
|
continue;
|
|
}
|
|
|
|
// Use the new VALU Opcode.
|
|
const MCInstrDesc &NewDesc = get(NewOpcode);
|
|
Inst->setDesc(NewDesc);
|
|
|
|
// Remove any references to SCC. Vector instructions can't read from it, and
|
|
// We're just about to add the implicit use / defs of VCC, and we don't want
|
|
// both.
|
|
for (unsigned i = Inst->getNumOperands() - 1; i > 0; --i) {
|
|
MachineOperand &Op = Inst->getOperand(i);
|
|
if (Op.isReg() && Op.getReg() == AMDGPU::SCC)
|
|
Inst->RemoveOperand(i);
|
|
}
|
|
|
|
if (Opcode == AMDGPU::S_SEXT_I32_I8 || Opcode == AMDGPU::S_SEXT_I32_I16) {
|
|
// We are converting these to a BFE, so we need to add the missing
|
|
// operands for the size and offset.
|
|
unsigned Size = (Opcode == AMDGPU::S_SEXT_I32_I8) ? 8 : 16;
|
|
Inst->addOperand(MachineOperand::CreateImm(0));
|
|
Inst->addOperand(MachineOperand::CreateImm(Size));
|
|
|
|
} else if (Opcode == AMDGPU::S_BCNT1_I32_B32) {
|
|
// The VALU version adds the second operand to the result, so insert an
|
|
// extra 0 operand.
|
|
Inst->addOperand(MachineOperand::CreateImm(0));
|
|
}
|
|
|
|
addDescImplicitUseDef(NewDesc, Inst);
|
|
|
|
if (Opcode == AMDGPU::S_BFE_I32 || Opcode == AMDGPU::S_BFE_U32) {
|
|
const MachineOperand &OffsetWidthOp = Inst->getOperand(2);
|
|
// If we need to move this to VGPRs, we need to unpack the second operand
|
|
// back into the 2 separate ones for bit offset and width.
|
|
assert(OffsetWidthOp.isImm() &&
|
|
"Scalar BFE is only implemented for constant width and offset");
|
|
uint32_t Imm = OffsetWidthOp.getImm();
|
|
|
|
uint32_t Offset = Imm & 0x3f; // Extract bits [5:0].
|
|
uint32_t BitWidth = (Imm & 0x7f0000) >> 16; // Extract bits [22:16].
|
|
Inst->RemoveOperand(2); // Remove old immediate.
|
|
Inst->addOperand(MachineOperand::CreateImm(Offset));
|
|
Inst->addOperand(MachineOperand::CreateImm(BitWidth));
|
|
}
|
|
|
|
// Update the destination register class.
|
|
|
|
const TargetRegisterClass *NewDstRC = getOpRegClass(*Inst, 0);
|
|
|
|
switch (Opcode) {
|
|
// For target instructions, getOpRegClass just returns the virtual
|
|
// register class associated with the operand, so we need to find an
|
|
// equivalent VGPR register class in order to move the instruction to the
|
|
// VALU.
|
|
case AMDGPU::COPY:
|
|
case AMDGPU::PHI:
|
|
case AMDGPU::REG_SEQUENCE:
|
|
case AMDGPU::INSERT_SUBREG:
|
|
if (RI.hasVGPRs(NewDstRC))
|
|
continue;
|
|
NewDstRC = RI.getEquivalentVGPRClass(NewDstRC);
|
|
if (!NewDstRC)
|
|
continue;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
unsigned DstReg = Inst->getOperand(0).getReg();
|
|
unsigned NewDstReg = MRI.createVirtualRegister(NewDstRC);
|
|
MRI.replaceRegWith(DstReg, NewDstReg);
|
|
|
|
// Legalize the operands
|
|
legalizeOperands(Inst);
|
|
|
|
for (MachineRegisterInfo::use_iterator I = MRI.use_begin(NewDstReg),
|
|
E = MRI.use_end(); I != E; ++I) {
|
|
MachineInstr &UseMI = *I->getParent();
|
|
if (!canReadVGPR(UseMI, I.getOperandNo())) {
|
|
Worklist.push_back(&UseMI);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// Indirect addressing callbacks
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
unsigned SIInstrInfo::calculateIndirectAddress(unsigned RegIndex,
|
|
unsigned Channel) const {
|
|
assert(Channel == 0);
|
|
return RegIndex;
|
|
}
|
|
|
|
const TargetRegisterClass *SIInstrInfo::getIndirectAddrRegClass() const {
|
|
return &AMDGPU::VGPR_32RegClass;
|
|
}
|
|
|
|
void SIInstrInfo::splitScalar64BitUnaryOp(
|
|
SmallVectorImpl<MachineInstr *> &Worklist,
|
|
MachineInstr *Inst,
|
|
unsigned Opcode) const {
|
|
MachineBasicBlock &MBB = *Inst->getParent();
|
|
MachineRegisterInfo &MRI = MBB.getParent()->getRegInfo();
|
|
|
|
MachineOperand &Dest = Inst->getOperand(0);
|
|
MachineOperand &Src0 = Inst->getOperand(1);
|
|
DebugLoc DL = Inst->getDebugLoc();
|
|
|
|
MachineBasicBlock::iterator MII = Inst;
|
|
|
|
const MCInstrDesc &InstDesc = get(Opcode);
|
|
const TargetRegisterClass *Src0RC = Src0.isReg() ?
|
|
MRI.getRegClass(Src0.getReg()) :
|
|
&AMDGPU::SGPR_32RegClass;
|
|
|
|
const TargetRegisterClass *Src0SubRC = RI.getSubRegClass(Src0RC, AMDGPU::sub0);
|
|
|
|
MachineOperand SrcReg0Sub0 = buildExtractSubRegOrImm(MII, MRI, Src0, Src0RC,
|
|
AMDGPU::sub0, Src0SubRC);
|
|
|
|
const TargetRegisterClass *DestRC = MRI.getRegClass(Dest.getReg());
|
|
const TargetRegisterClass *DestSubRC = RI.getSubRegClass(DestRC, AMDGPU::sub0);
|
|
|
|
unsigned DestSub0 = MRI.createVirtualRegister(DestRC);
|
|
MachineInstr *LoHalf = BuildMI(MBB, MII, DL, InstDesc, DestSub0)
|
|
.addOperand(SrcReg0Sub0);
|
|
|
|
MachineOperand SrcReg0Sub1 = buildExtractSubRegOrImm(MII, MRI, Src0, Src0RC,
|
|
AMDGPU::sub1, Src0SubRC);
|
|
|
|
unsigned DestSub1 = MRI.createVirtualRegister(DestSubRC);
|
|
MachineInstr *HiHalf = BuildMI(MBB, MII, DL, InstDesc, DestSub1)
|
|
.addOperand(SrcReg0Sub1);
|
|
|
|
unsigned FullDestReg = MRI.createVirtualRegister(DestRC);
|
|
BuildMI(MBB, MII, DL, get(TargetOpcode::REG_SEQUENCE), FullDestReg)
|
|
.addReg(DestSub0)
|
|
.addImm(AMDGPU::sub0)
|
|
.addReg(DestSub1)
|
|
.addImm(AMDGPU::sub1);
|
|
|
|
MRI.replaceRegWith(Dest.getReg(), FullDestReg);
|
|
|
|
// Try to legalize the operands in case we need to swap the order to keep it
|
|
// valid.
|
|
Worklist.push_back(LoHalf);
|
|
Worklist.push_back(HiHalf);
|
|
}
|
|
|
|
void SIInstrInfo::splitScalar64BitBinaryOp(
|
|
SmallVectorImpl<MachineInstr *> &Worklist,
|
|
MachineInstr *Inst,
|
|
unsigned Opcode) const {
|
|
MachineBasicBlock &MBB = *Inst->getParent();
|
|
MachineRegisterInfo &MRI = MBB.getParent()->getRegInfo();
|
|
|
|
MachineOperand &Dest = Inst->getOperand(0);
|
|
MachineOperand &Src0 = Inst->getOperand(1);
|
|
MachineOperand &Src1 = Inst->getOperand(2);
|
|
DebugLoc DL = Inst->getDebugLoc();
|
|
|
|
MachineBasicBlock::iterator MII = Inst;
|
|
|
|
const MCInstrDesc &InstDesc = get(Opcode);
|
|
const TargetRegisterClass *Src0RC = Src0.isReg() ?
|
|
MRI.getRegClass(Src0.getReg()) :
|
|
&AMDGPU::SGPR_32RegClass;
|
|
|
|
const TargetRegisterClass *Src0SubRC = RI.getSubRegClass(Src0RC, AMDGPU::sub0);
|
|
const TargetRegisterClass *Src1RC = Src1.isReg() ?
|
|
MRI.getRegClass(Src1.getReg()) :
|
|
&AMDGPU::SGPR_32RegClass;
|
|
|
|
const TargetRegisterClass *Src1SubRC = RI.getSubRegClass(Src1RC, AMDGPU::sub0);
|
|
|
|
MachineOperand SrcReg0Sub0 = buildExtractSubRegOrImm(MII, MRI, Src0, Src0RC,
|
|
AMDGPU::sub0, Src0SubRC);
|
|
MachineOperand SrcReg1Sub0 = buildExtractSubRegOrImm(MII, MRI, Src1, Src1RC,
|
|
AMDGPU::sub0, Src1SubRC);
|
|
|
|
const TargetRegisterClass *DestRC = MRI.getRegClass(Dest.getReg());
|
|
const TargetRegisterClass *DestSubRC = RI.getSubRegClass(DestRC, AMDGPU::sub0);
|
|
|
|
unsigned DestSub0 = MRI.createVirtualRegister(DestRC);
|
|
MachineInstr *LoHalf = BuildMI(MBB, MII, DL, InstDesc, DestSub0)
|
|
.addOperand(SrcReg0Sub0)
|
|
.addOperand(SrcReg1Sub0);
|
|
|
|
MachineOperand SrcReg0Sub1 = buildExtractSubRegOrImm(MII, MRI, Src0, Src0RC,
|
|
AMDGPU::sub1, Src0SubRC);
|
|
MachineOperand SrcReg1Sub1 = buildExtractSubRegOrImm(MII, MRI, Src1, Src1RC,
|
|
AMDGPU::sub1, Src1SubRC);
|
|
|
|
unsigned DestSub1 = MRI.createVirtualRegister(DestSubRC);
|
|
MachineInstr *HiHalf = BuildMI(MBB, MII, DL, InstDesc, DestSub1)
|
|
.addOperand(SrcReg0Sub1)
|
|
.addOperand(SrcReg1Sub1);
|
|
|
|
unsigned FullDestReg = MRI.createVirtualRegister(DestRC);
|
|
BuildMI(MBB, MII, DL, get(TargetOpcode::REG_SEQUENCE), FullDestReg)
|
|
.addReg(DestSub0)
|
|
.addImm(AMDGPU::sub0)
|
|
.addReg(DestSub1)
|
|
.addImm(AMDGPU::sub1);
|
|
|
|
MRI.replaceRegWith(Dest.getReg(), FullDestReg);
|
|
|
|
// Try to legalize the operands in case we need to swap the order to keep it
|
|
// valid.
|
|
Worklist.push_back(LoHalf);
|
|
Worklist.push_back(HiHalf);
|
|
}
|
|
|
|
void SIInstrInfo::splitScalar64BitBCNT(SmallVectorImpl<MachineInstr *> &Worklist,
|
|
MachineInstr *Inst) const {
|
|
MachineBasicBlock &MBB = *Inst->getParent();
|
|
MachineRegisterInfo &MRI = MBB.getParent()->getRegInfo();
|
|
|
|
MachineBasicBlock::iterator MII = Inst;
|
|
DebugLoc DL = Inst->getDebugLoc();
|
|
|
|
MachineOperand &Dest = Inst->getOperand(0);
|
|
MachineOperand &Src = Inst->getOperand(1);
|
|
|
|
const MCInstrDesc &InstDesc = get(AMDGPU::V_BCNT_U32_B32_e64);
|
|
const TargetRegisterClass *SrcRC = Src.isReg() ?
|
|
MRI.getRegClass(Src.getReg()) :
|
|
&AMDGPU::SGPR_32RegClass;
|
|
|
|
unsigned MidReg = MRI.createVirtualRegister(&AMDGPU::VGPR_32RegClass);
|
|
unsigned ResultReg = MRI.createVirtualRegister(&AMDGPU::VGPR_32RegClass);
|
|
|
|
const TargetRegisterClass *SrcSubRC = RI.getSubRegClass(SrcRC, AMDGPU::sub0);
|
|
|
|
MachineOperand SrcRegSub0 = buildExtractSubRegOrImm(MII, MRI, Src, SrcRC,
|
|
AMDGPU::sub0, SrcSubRC);
|
|
MachineOperand SrcRegSub1 = buildExtractSubRegOrImm(MII, MRI, Src, SrcRC,
|
|
AMDGPU::sub1, SrcSubRC);
|
|
|
|
MachineInstr *First = BuildMI(MBB, MII, DL, InstDesc, MidReg)
|
|
.addOperand(SrcRegSub0)
|
|
.addImm(0);
|
|
|
|
MachineInstr *Second = BuildMI(MBB, MII, DL, InstDesc, ResultReg)
|
|
.addOperand(SrcRegSub1)
|
|
.addReg(MidReg);
|
|
|
|
MRI.replaceRegWith(Dest.getReg(), ResultReg);
|
|
|
|
Worklist.push_back(First);
|
|
Worklist.push_back(Second);
|
|
}
|
|
|
|
void SIInstrInfo::splitScalar64BitBFE(SmallVectorImpl<MachineInstr *> &Worklist,
|
|
MachineInstr *Inst) const {
|
|
MachineBasicBlock &MBB = *Inst->getParent();
|
|
MachineRegisterInfo &MRI = MBB.getParent()->getRegInfo();
|
|
MachineBasicBlock::iterator MII = Inst;
|
|
DebugLoc DL = Inst->getDebugLoc();
|
|
|
|
MachineOperand &Dest = Inst->getOperand(0);
|
|
uint32_t Imm = Inst->getOperand(2).getImm();
|
|
uint32_t Offset = Imm & 0x3f; // Extract bits [5:0].
|
|
uint32_t BitWidth = (Imm & 0x7f0000) >> 16; // Extract bits [22:16].
|
|
|
|
(void) Offset;
|
|
|
|
// Only sext_inreg cases handled.
|
|
assert(Inst->getOpcode() == AMDGPU::S_BFE_I64 &&
|
|
BitWidth <= 32 &&
|
|
Offset == 0 &&
|
|
"Not implemented");
|
|
|
|
if (BitWidth < 32) {
|
|
unsigned MidRegLo = MRI.createVirtualRegister(&AMDGPU::VGPR_32RegClass);
|
|
unsigned MidRegHi = MRI.createVirtualRegister(&AMDGPU::VGPR_32RegClass);
|
|
unsigned ResultReg = MRI.createVirtualRegister(&AMDGPU::VReg_64RegClass);
|
|
|
|
BuildMI(MBB, MII, DL, get(AMDGPU::V_BFE_I32), MidRegLo)
|
|
.addReg(Inst->getOperand(1).getReg(), 0, AMDGPU::sub0)
|
|
.addImm(0)
|
|
.addImm(BitWidth);
|
|
|
|
BuildMI(MBB, MII, DL, get(AMDGPU::V_ASHRREV_I32_e32), MidRegHi)
|
|
.addImm(31)
|
|
.addReg(MidRegLo);
|
|
|
|
BuildMI(MBB, MII, DL, get(TargetOpcode::REG_SEQUENCE), ResultReg)
|
|
.addReg(MidRegLo)
|
|
.addImm(AMDGPU::sub0)
|
|
.addReg(MidRegHi)
|
|
.addImm(AMDGPU::sub1);
|
|
|
|
MRI.replaceRegWith(Dest.getReg(), ResultReg);
|
|
return;
|
|
}
|
|
|
|
MachineOperand &Src = Inst->getOperand(1);
|
|
unsigned TmpReg = MRI.createVirtualRegister(&AMDGPU::VGPR_32RegClass);
|
|
unsigned ResultReg = MRI.createVirtualRegister(&AMDGPU::VReg_64RegClass);
|
|
|
|
BuildMI(MBB, MII, DL, get(AMDGPU::V_ASHRREV_I32_e64), TmpReg)
|
|
.addImm(31)
|
|
.addReg(Src.getReg(), 0, AMDGPU::sub0);
|
|
|
|
BuildMI(MBB, MII, DL, get(TargetOpcode::REG_SEQUENCE), ResultReg)
|
|
.addReg(Src.getReg(), 0, AMDGPU::sub0)
|
|
.addImm(AMDGPU::sub0)
|
|
.addReg(TmpReg)
|
|
.addImm(AMDGPU::sub1);
|
|
|
|
MRI.replaceRegWith(Dest.getReg(), ResultReg);
|
|
}
|
|
|
|
void SIInstrInfo::addDescImplicitUseDef(const MCInstrDesc &NewDesc,
|
|
MachineInstr *Inst) const {
|
|
// Add the implict and explicit register definitions.
|
|
if (NewDesc.ImplicitUses) {
|
|
for (unsigned i = 0; NewDesc.ImplicitUses[i]; ++i) {
|
|
unsigned Reg = NewDesc.ImplicitUses[i];
|
|
Inst->addOperand(MachineOperand::CreateReg(Reg, false, true));
|
|
}
|
|
}
|
|
|
|
if (NewDesc.ImplicitDefs) {
|
|
for (unsigned i = 0; NewDesc.ImplicitDefs[i]; ++i) {
|
|
unsigned Reg = NewDesc.ImplicitDefs[i];
|
|
Inst->addOperand(MachineOperand::CreateReg(Reg, true, true));
|
|
}
|
|
}
|
|
}
|
|
|
|
unsigned SIInstrInfo::findUsedSGPR(const MachineInstr *MI,
|
|
int OpIndices[3]) const {
|
|
const MCInstrDesc &Desc = get(MI->getOpcode());
|
|
|
|
// Find the one SGPR operand we are allowed to use.
|
|
unsigned SGPRReg = AMDGPU::NoRegister;
|
|
|
|
// First we need to consider the instruction's operand requirements before
|
|
// legalizing. Some operands are required to be SGPRs, such as implicit uses
|
|
// of VCC, but we are still bound by the constant bus requirement to only use
|
|
// one.
|
|
//
|
|
// If the operand's class is an SGPR, we can never move it.
|
|
|
|
for (const MachineOperand &MO : MI->implicit_operands()) {
|
|
// We only care about reads.
|
|
if (MO.isDef())
|
|
continue;
|
|
|
|
if (MO.getReg() == AMDGPU::VCC)
|
|
return AMDGPU::VCC;
|
|
|
|
if (MO.getReg() == AMDGPU::FLAT_SCR)
|
|
return AMDGPU::FLAT_SCR;
|
|
}
|
|
|
|
unsigned UsedSGPRs[3] = { AMDGPU::NoRegister };
|
|
const MachineRegisterInfo &MRI = MI->getParent()->getParent()->getRegInfo();
|
|
|
|
for (unsigned i = 0; i < 3; ++i) {
|
|
int Idx = OpIndices[i];
|
|
if (Idx == -1)
|
|
break;
|
|
|
|
const MachineOperand &MO = MI->getOperand(Idx);
|
|
if (RI.isSGPRClassID(Desc.OpInfo[Idx].RegClass))
|
|
SGPRReg = MO.getReg();
|
|
|
|
if (MO.isReg() && RI.isSGPRClass(MRI.getRegClass(MO.getReg())))
|
|
UsedSGPRs[i] = MO.getReg();
|
|
}
|
|
|
|
if (SGPRReg != AMDGPU::NoRegister)
|
|
return SGPRReg;
|
|
|
|
// We don't have a required SGPR operand, so we have a bit more freedom in
|
|
// selecting operands to move.
|
|
|
|
// Try to select the most used SGPR. If an SGPR is equal to one of the
|
|
// others, we choose that.
|
|
//
|
|
// e.g.
|
|
// V_FMA_F32 v0, s0, s0, s0 -> No moves
|
|
// V_FMA_F32 v0, s0, s1, s0 -> Move s1
|
|
|
|
if (UsedSGPRs[0] != AMDGPU::NoRegister) {
|
|
if (UsedSGPRs[0] == UsedSGPRs[1] || UsedSGPRs[0] == UsedSGPRs[2])
|
|
SGPRReg = UsedSGPRs[0];
|
|
}
|
|
|
|
if (SGPRReg == AMDGPU::NoRegister && UsedSGPRs[1] != AMDGPU::NoRegister) {
|
|
if (UsedSGPRs[1] == UsedSGPRs[2])
|
|
SGPRReg = UsedSGPRs[1];
|
|
}
|
|
|
|
return SGPRReg;
|
|
}
|
|
|
|
MachineInstrBuilder SIInstrInfo::buildIndirectWrite(
|
|
MachineBasicBlock *MBB,
|
|
MachineBasicBlock::iterator I,
|
|
unsigned ValueReg,
|
|
unsigned Address, unsigned OffsetReg) const {
|
|
const DebugLoc &DL = MBB->findDebugLoc(I);
|
|
unsigned IndirectBaseReg = AMDGPU::VGPR_32RegClass.getRegister(
|
|
getIndirectIndexBegin(*MBB->getParent()));
|
|
|
|
return BuildMI(*MBB, I, DL, get(AMDGPU::SI_INDIRECT_DST_V1))
|
|
.addReg(IndirectBaseReg, RegState::Define)
|
|
.addOperand(I->getOperand(0))
|
|
.addReg(IndirectBaseReg)
|
|
.addReg(OffsetReg)
|
|
.addImm(0)
|
|
.addReg(ValueReg);
|
|
}
|
|
|
|
MachineInstrBuilder SIInstrInfo::buildIndirectRead(
|
|
MachineBasicBlock *MBB,
|
|
MachineBasicBlock::iterator I,
|
|
unsigned ValueReg,
|
|
unsigned Address, unsigned OffsetReg) const {
|
|
const DebugLoc &DL = MBB->findDebugLoc(I);
|
|
unsigned IndirectBaseReg = AMDGPU::VGPR_32RegClass.getRegister(
|
|
getIndirectIndexBegin(*MBB->getParent()));
|
|
|
|
return BuildMI(*MBB, I, DL, get(AMDGPU::SI_INDIRECT_SRC))
|
|
.addOperand(I->getOperand(0))
|
|
.addOperand(I->getOperand(1))
|
|
.addReg(IndirectBaseReg)
|
|
.addReg(OffsetReg)
|
|
.addImm(0);
|
|
|
|
}
|
|
|
|
void SIInstrInfo::reserveIndirectRegisters(BitVector &Reserved,
|
|
const MachineFunction &MF) const {
|
|
int End = getIndirectIndexEnd(MF);
|
|
int Begin = getIndirectIndexBegin(MF);
|
|
|
|
if (End == -1)
|
|
return;
|
|
|
|
|
|
for (int Index = Begin; Index <= End; ++Index)
|
|
Reserved.set(AMDGPU::VGPR_32RegClass.getRegister(Index));
|
|
|
|
for (int Index = std::max(0, Begin - 1); Index <= End; ++Index)
|
|
Reserved.set(AMDGPU::VReg_64RegClass.getRegister(Index));
|
|
|
|
for (int Index = std::max(0, Begin - 2); Index <= End; ++Index)
|
|
Reserved.set(AMDGPU::VReg_96RegClass.getRegister(Index));
|
|
|
|
for (int Index = std::max(0, Begin - 3); Index <= End; ++Index)
|
|
Reserved.set(AMDGPU::VReg_128RegClass.getRegister(Index));
|
|
|
|
for (int Index = std::max(0, Begin - 7); Index <= End; ++Index)
|
|
Reserved.set(AMDGPU::VReg_256RegClass.getRegister(Index));
|
|
|
|
for (int Index = std::max(0, Begin - 15); Index <= End; ++Index)
|
|
Reserved.set(AMDGPU::VReg_512RegClass.getRegister(Index));
|
|
}
|
|
|
|
MachineOperand *SIInstrInfo::getNamedOperand(MachineInstr &MI,
|
|
unsigned OperandName) const {
|
|
int Idx = AMDGPU::getNamedOperandIdx(MI.getOpcode(), OperandName);
|
|
if (Idx == -1)
|
|
return nullptr;
|
|
|
|
return &MI.getOperand(Idx);
|
|
}
|
|
|
|
uint64_t SIInstrInfo::getDefaultRsrcDataFormat() const {
|
|
uint64_t RsrcDataFormat = AMDGPU::RSRC_DATA_FORMAT;
|
|
if (ST.isAmdHsaOS())
|
|
RsrcDataFormat |= (1ULL << 56);
|
|
|
|
return RsrcDataFormat;
|
|
}
|