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[AMDGPU][NewPM] Port SIOptimizeExecMaskingPreRA to NPM #125351

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Feb 20, 2025
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2 changes: 1 addition & 1 deletion llvm/lib/Target/AMDGPU/AMDGPU.h
Original file line number Diff line number Diff line change
Expand Up @@ -368,7 +368,7 @@ struct AMDGPUUnifyMetadataPass : PassInfoMixin<AMDGPUUnifyMetadataPass> {
PreservedAnalyses run(Module &M, ModuleAnalysisManager &AM);
};

void initializeSIOptimizeExecMaskingPreRAPass(PassRegistry&);
void initializeSIOptimizeExecMaskingPreRALegacyPass(PassRegistry &);
extern char &SIOptimizeExecMaskingPreRAID;

void initializeSIOptimizeVGPRLiveRangeLegacyPass(PassRegistry &);
Expand Down
2 changes: 1 addition & 1 deletion llvm/lib/Target/AMDGPU/AMDGPUPassRegistry.def
Original file line number Diff line number Diff line change
Expand Up @@ -113,6 +113,7 @@ MACHINE_FUNCTION_PASS("si-lower-sgpr-spills", SILowerSGPRSpillsPass())
MACHINE_FUNCTION_PASS("si-lower-wwm-copies", SILowerWWMCopiesPass())
MACHINE_FUNCTION_PASS("si-opt-vgpr-liverange", SIOptimizeVGPRLiveRangePass())
MACHINE_FUNCTION_PASS("si-optimize-exec-masking", SIOptimizeExecMaskingPass())
MACHINE_FUNCTION_PASS("si-optimize-exec-masking-pre-ra", SIOptimizeExecMaskingPreRAPass())
MACHINE_FUNCTION_PASS("si-peephole-sdwa", SIPeepholeSDWAPass())
MACHINE_FUNCTION_PASS("si-pre-allocate-wwm-regs", SIPreAllocateWWMRegsPass())
MACHINE_FUNCTION_PASS("si-shrink-instructions", SIShrinkInstructionsPass())
Expand All @@ -130,7 +131,6 @@ DUMMY_MACHINE_FUNCTION_PASS("si-insert-waitcnts", SIInsertWaitcntsPass())
DUMMY_MACHINE_FUNCTION_PASS("si-late-branch-lowering", SILateBranchLoweringPass())
DUMMY_MACHINE_FUNCTION_PASS("si-memory-legalizer", SIMemoryLegalizerPass())
DUMMY_MACHINE_FUNCTION_PASS("si-mode-register", SIModeRegisterPass())
DUMMY_MACHINE_FUNCTION_PASS("si-optimize-exec-masking-pre-ra", SIOptimizeExecMaskingPreRAPass())
DUMMY_MACHINE_FUNCTION_PASS("si-pre-emit-peephole", SIPreEmitPeepholePass())
// TODO: Move amdgpu-preload-kern-arg-prolog to MACHINE_FUNCTION_PASS since it
// already exists.
Expand Down
3 changes: 2 additions & 1 deletion llvm/lib/Target/AMDGPU/AMDGPUTargetMachine.cpp
Original file line number Diff line number Diff line change
Expand Up @@ -51,6 +51,7 @@
#include "SIMachineFunctionInfo.h"
#include "SIMachineScheduler.h"
#include "SIOptimizeExecMasking.h"
#include "SIOptimizeExecMaskingPreRA.h"
#include "SIOptimizeVGPRLiveRange.h"
#include "SIPeepholeSDWA.h"
#include "SIPreAllocateWWMRegs.h"
Expand Down Expand Up @@ -501,7 +502,7 @@ extern "C" LLVM_EXTERNAL_VISIBILITY void LLVMInitializeAMDGPUTarget() {
initializeSIFoldOperandsLegacyPass(*PR);
initializeSIPeepholeSDWALegacyPass(*PR);
initializeSIShrinkInstructionsLegacyPass(*PR);
initializeSIOptimizeExecMaskingPreRAPass(*PR);
initializeSIOptimizeExecMaskingPreRALegacyPass(*PR);
initializeSIOptimizeVGPRLiveRangeLegacyPass(*PR);
initializeSILoadStoreOptimizerLegacyPass(*PR);
initializeAMDGPUCtorDtorLoweringLegacyPass(*PR);
Expand Down
41 changes: 31 additions & 10 deletions llvm/lib/Target/AMDGPU/SIOptimizeExecMaskingPreRA.cpp
Original file line number Diff line number Diff line change
Expand Up @@ -12,6 +12,7 @@
///
//===----------------------------------------------------------------------===//

#include "SIOptimizeExecMaskingPreRA.h"
#include "AMDGPU.h"
#include "GCNSubtarget.h"
#include "MCTargetDesc/AMDGPUMCTargetDesc.h"
Expand All @@ -25,7 +26,7 @@ using namespace llvm;

namespace {

class SIOptimizeExecMaskingPreRA : public MachineFunctionPass {
class SIOptimizeExecMaskingPreRA {
private:
const SIRegisterInfo *TRI;
const SIInstrInfo *TII;
Expand All @@ -42,11 +43,18 @@ class SIOptimizeExecMaskingPreRA : public MachineFunctionPass {
bool optimizeVcndVcmpPair(MachineBasicBlock &MBB);
bool optimizeElseBranch(MachineBasicBlock &MBB);

public:
SIOptimizeExecMaskingPreRA(LiveIntervals *LIS) : LIS(LIS) {}
bool run(MachineFunction &MF);
};

class SIOptimizeExecMaskingPreRALegacy : public MachineFunctionPass {
public:
static char ID;

SIOptimizeExecMaskingPreRA() : MachineFunctionPass(ID) {
initializeSIOptimizeExecMaskingPreRAPass(*PassRegistry::getPassRegistry());
SIOptimizeExecMaskingPreRALegacy() : MachineFunctionPass(ID) {
initializeSIOptimizeExecMaskingPreRALegacyPass(
*PassRegistry::getPassRegistry());
}

bool runOnMachineFunction(MachineFunction &MF) override;
Expand All @@ -64,18 +72,18 @@ class SIOptimizeExecMaskingPreRA : public MachineFunctionPass {

} // End anonymous namespace.

INITIALIZE_PASS_BEGIN(SIOptimizeExecMaskingPreRA, DEBUG_TYPE,
INITIALIZE_PASS_BEGIN(SIOptimizeExecMaskingPreRALegacy, DEBUG_TYPE,
"SI optimize exec mask operations pre-RA", false, false)
INITIALIZE_PASS_DEPENDENCY(LiveIntervalsWrapperPass)
INITIALIZE_PASS_END(SIOptimizeExecMaskingPreRA, DEBUG_TYPE,
INITIALIZE_PASS_END(SIOptimizeExecMaskingPreRALegacy, DEBUG_TYPE,
"SI optimize exec mask operations pre-RA", false, false)

char SIOptimizeExecMaskingPreRA::ID = 0;
char SIOptimizeExecMaskingPreRALegacy::ID = 0;

char &llvm::SIOptimizeExecMaskingPreRAID = SIOptimizeExecMaskingPreRA::ID;
char &llvm::SIOptimizeExecMaskingPreRAID = SIOptimizeExecMaskingPreRALegacy::ID;

FunctionPass *llvm::createSIOptimizeExecMaskingPreRAPass() {
return new SIOptimizeExecMaskingPreRA();
return new SIOptimizeExecMaskingPreRALegacy();
}

// See if there is a def between \p AndIdx and \p SelIdx that needs to live
Expand Down Expand Up @@ -340,15 +348,28 @@ bool SIOptimizeExecMaskingPreRA::optimizeElseBranch(MachineBasicBlock &MBB) {
return true;
}

bool SIOptimizeExecMaskingPreRA::runOnMachineFunction(MachineFunction &MF) {
PreservedAnalyses
SIOptimizeExecMaskingPreRAPass::run(MachineFunction &MF,
MachineFunctionAnalysisManager &MFAM) {
auto &LIS = MFAM.getResult<LiveIntervalsAnalysis>(MF);
SIOptimizeExecMaskingPreRA(&LIS).run(MF);
return PreservedAnalyses::all();
}

bool SIOptimizeExecMaskingPreRALegacy::runOnMachineFunction(
MachineFunction &MF) {
if (skipFunction(MF.getFunction()))
return false;

auto *LIS = &getAnalysis<LiveIntervalsWrapperPass>().getLIS();
return SIOptimizeExecMaskingPreRA(LIS).run(MF);
}

bool SIOptimizeExecMaskingPreRA::run(MachineFunction &MF) {
const GCNSubtarget &ST = MF.getSubtarget<GCNSubtarget>();
TRI = ST.getRegisterInfo();
TII = ST.getInstrInfo();
MRI = &MF.getRegInfo();
LIS = &getAnalysis<LiveIntervalsWrapperPass>().getLIS();

const bool Wave32 = ST.isWave32();
AndOpc = Wave32 ? AMDGPU::S_AND_B32 : AMDGPU::S_AND_B64;
Expand Down
23 changes: 23 additions & 0 deletions llvm/lib/Target/AMDGPU/SIOptimizeExecMaskingPreRA.h
Original file line number Diff line number Diff line change
@@ -0,0 +1,23 @@
//===- SIOptimizeExecMaskingPreRA.h.h ---------------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//

#ifndef LLVM_LIB_TARGET_AMDGPU_SIOPTIMIZEEXECMASKINGPRERA_H
#define LLVM_LIB_TARGET_AMDGPU_SIOPTIMIZEEXECMASKINGPRERA_H

#include "llvm/CodeGen/MachinePassManager.h"

namespace llvm {
class SIOptimizeExecMaskingPreRAPass
: public PassInfoMixin<SIOptimizeExecMaskingPreRAPass> {
public:
PreservedAnalyses run(MachineFunction &MF,
MachineFunctionAnalysisManager &MFAM);
};
} // namespace llvm

#endif // LLVM_LIB_TARGET_AMDGPU_SIOPTIMIZEEXECMASKINGPRERA_H
1 change: 1 addition & 0 deletions llvm/test/CodeGen/AMDGPU/collapse-endcf-broken.mir
Original file line number Diff line number Diff line change
@@ -1,5 +1,6 @@
# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
# RUN: llc -mtriple=amdgcn -verify-machineinstrs -run-pass=si-optimize-exec-masking-pre-ra %s -o - | FileCheck -check-prefix=GXN %s
# RUN: llc -mtriple=amdgcn -verify-machineinstrs -passes=si-optimize-exec-masking-pre-ra %s -o - | FileCheck -check-prefix=GXN %s

# FIXME: This is a miscompile, and the s_or_b64s need to be preserved.

Expand Down