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https://github.com/c64scene-ar/llvm-6502.git
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The logic in SIInsertWaits::getHwCounts() only really made sense for SMRD instructions, and trying to shoehorn it into handling DS_WRITE_B32 caused it to corrupt the encoding of that by clobbering the first operand with the second one. Undo that damage and only apply the SMRD logic to that. Fixes some derivates related piglit regressions with radeonsi. Reviewed-by: Tom Stellard <thomas.stellard@amd.com> git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@188558 91177308-0d34-0410-b5e6-96231b3b80d8
283 lines
8.6 KiB
C++
283 lines
8.6 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 "llvm/CodeGen/MachineInstrBuilder.h"
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#include "llvm/CodeGen/MachineRegisterInfo.h"
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#include "llvm/MC/MCInstrDesc.h"
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#include <stdio.h>
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using namespace llvm;
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SIInstrInfo::SIInstrInfo(AMDGPUTargetMachine &tm)
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: AMDGPUInstrInfo(tm),
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RI(tm)
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{ }
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const SIRegisterInfo &SIInstrInfo::getRegisterInfo() const {
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return RI;
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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::M0 == DestReg) {
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// Check if M0 isn't already set to this value
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for (MachineBasicBlock::reverse_iterator E = MBB.rend(),
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I = MachineBasicBlock::reverse_iterator(MI); I != E; ++I) {
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if (!I->definesRegister(AMDGPU::M0))
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continue;
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unsigned Opc = I->getOpcode();
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if (Opc != TargetOpcode::COPY && Opc != AMDGPU::S_MOV_B32)
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break;
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if (!I->readsRegister(SrcReg))
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break;
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// The copy isn't necessary
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return;
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}
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}
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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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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::VReg_32RegClass.contains(DestReg)) {
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assert(AMDGPU::VReg_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(unsigned Opcode) const {
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int NewOpc;
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// Try to map original to commuted opcode
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if ((NewOpc = AMDGPU::getCommuteRev(Opcode)) != -1)
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return NewOpc;
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// Try to map commuted to original opcode
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if ((NewOpc = AMDGPU::getCommuteOrig(Opcode)) != -1)
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return NewOpc;
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return Opcode;
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}
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MachineInstr *SIInstrInfo::commuteInstruction(MachineInstr *MI,
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bool NewMI) const {
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if (MI->getNumOperands() < 3 || !MI->getOperand(1).isReg() ||
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!MI->getOperand(2).isReg())
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return 0;
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MI = TargetInstrInfo::commuteInstruction(MI, NewMI);
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if (MI)
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MI->setDesc(get(commuteOpcode(MI->getOpcode())));
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return MI;
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}
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MachineInstr * SIInstrInfo::getMovImmInstr(MachineFunction *MF, unsigned DstReg,
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int64_t Imm) const {
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MachineInstr * MI = MF->CreateMachineInstr(get(AMDGPU::V_MOV_B32_e32), DebugLoc());
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MachineInstrBuilder MIB(*MF, MI);
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MIB.addReg(DstReg, RegState::Define);
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MIB.addImm(Imm);
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return MI;
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}
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bool SIInstrInfo::isMov(unsigned Opcode) const {
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switch(Opcode) {
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default: return false;
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case AMDGPU::S_MOV_B32:
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case AMDGPU::S_MOV_B64:
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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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}
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}
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bool
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SIInstrInfo::isSafeToMoveRegClassDefs(const TargetRegisterClass *RC) const {
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return RC != &AMDGPU::EXECRegRegClass;
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}
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int SIInstrInfo::isMIMG(uint16_t Opcode) const {
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return get(Opcode).TSFlags & SIInstrFlags::MIMG;
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}
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int SIInstrInfo::isSMRD(uint16_t Opcode) const {
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return get(Opcode).TSFlags & SIInstrFlags::SMRD;
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}
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//===----------------------------------------------------------------------===//
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// Indirect addressing callbacks
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//===----------------------------------------------------------------------===//
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unsigned SIInstrInfo::calculateIndirectAddress(unsigned RegIndex,
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unsigned Channel) const {
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assert(Channel == 0);
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return RegIndex;
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}
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int SIInstrInfo::getIndirectIndexBegin(const MachineFunction &MF) const {
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llvm_unreachable("Unimplemented");
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}
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int SIInstrInfo::getIndirectIndexEnd(const MachineFunction &MF) const {
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llvm_unreachable("Unimplemented");
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}
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const TargetRegisterClass *SIInstrInfo::getIndirectAddrStoreRegClass(
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unsigned SourceReg) const {
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llvm_unreachable("Unimplemented");
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}
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const TargetRegisterClass *SIInstrInfo::getIndirectAddrLoadRegClass() const {
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llvm_unreachable("Unimplemented");
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}
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MachineInstrBuilder SIInstrInfo::buildIndirectWrite(
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MachineBasicBlock *MBB,
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MachineBasicBlock::iterator I,
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unsigned ValueReg,
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unsigned Address, unsigned OffsetReg) const {
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llvm_unreachable("Unimplemented");
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}
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MachineInstrBuilder SIInstrInfo::buildIndirectRead(
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MachineBasicBlock *MBB,
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MachineBasicBlock::iterator I,
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unsigned ValueReg,
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unsigned Address, unsigned OffsetReg) const {
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llvm_unreachable("Unimplemented");
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}
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const TargetRegisterClass *SIInstrInfo::getSuperIndirectRegClass() const {
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llvm_unreachable("Unimplemented");
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}
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