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[Sched] Add MacroFusion mutation if fusions are not empty #72227

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Feb 7, 2024
Merged

[Sched] Add MacroFusion mutation if fusions are not empty #72227

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17 changes: 15 additions & 2 deletions llvm/lib/CodeGen/MachineScheduler.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -3804,6 +3804,12 @@ ScheduleDAGMILive *llvm::createGenericSchedLive(MachineSchedContext *C) {
// data and pass it to later mutations. Have a single mutation that gathers
// the interesting nodes in one pass.
DAG->addMutation(createCopyConstrainDAGMutation(DAG->TII, DAG->TRI));

const TargetSubtargetInfo &STI = C->MF->getSubtarget();
// Add MacroFusion mutation if fusions are not empty.
const auto &MacroFusions = STI.getMacroFusions();
if (!MacroFusions.empty())
DAG->addMutation(createMacroFusionDAGMutation(MacroFusions));
return DAG;
}

Expand Down Expand Up @@ -3953,8 +3959,15 @@ void PostGenericScheduler::schedNode(SUnit *SU, bool IsTopNode) {
}

ScheduleDAGMI *llvm::createGenericSchedPostRA(MachineSchedContext *C) {
return new ScheduleDAGMI(C, std::make_unique<PostGenericScheduler>(C),
/*RemoveKillFlags=*/true);
ScheduleDAGMI *DAG =
new ScheduleDAGMI(C, std::make_unique<PostGenericScheduler>(C),
/*RemoveKillFlags=*/true);
const TargetSubtargetInfo &STI = C->MF->getSubtarget();
// Add MacroFusion mutation if fusions are not empty.
const auto &MacroFusions = STI.getMacroFusions();
if (!MacroFusions.empty())
DAG->addMutation(createMacroFusionDAGMutation(MacroFusions));
return DAG;
}

//===----------------------------------------------------------------------===//
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17 changes: 0 additions & 17 deletions llvm/lib/Target/RISCV/RISCVTargetMachine.cpp
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Expand Up @@ -362,26 +362,9 @@ class RISCVPassConfig : public TargetPassConfig {
DAG->addMutation(createLoadClusterDAGMutation(
DAG->TII, DAG->TRI, /*ReorderWhileClustering=*/true));
}
const auto &MacroFusions = ST.getMacroFusions();
if (!MacroFusions.empty()) {
DAG = DAG ? DAG : createGenericSchedLive(C);
DAG->addMutation(createMacroFusionDAGMutation(MacroFusions));
}
return DAG;
}

ScheduleDAGInstrs *
createPostMachineScheduler(MachineSchedContext *C) const override {
const RISCVSubtarget &ST = C->MF->getSubtarget<RISCVSubtarget>();
const auto &MacroFusions = ST.getMacroFusions();
if (!MacroFusions.empty()) {
ScheduleDAGMI *DAG = createGenericSchedPostRA(C);
DAG->addMutation(createMacroFusionDAGMutation(MacroFusions));
return DAG;
}
return nullptr;
}

void addIRPasses() override;
bool addPreISel() override;
bool addInstSelector() override;
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