55 lines
1.6 KiB
C++
55 lines
1.6 KiB
C++
//===----------------------------------------------------------------------===//
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// Instruction Selector Subtarget Control
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//===----------------------------------------------------------------------===//
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//===----------------------------------------------------------------------===//
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// This file defines a pass used to change the subtarget for the
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// Mips Instruction selector.
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//
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//===----------------------------------------------------------------------===//
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#include "Mips.h"
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#include "MipsTargetMachine.h"
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#include "llvm/CodeGen/TargetPassConfig.h"
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#include "llvm/Support/Debug.h"
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#include "llvm/Support/raw_ostream.h"
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using namespace llvm;
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#define DEBUG_TYPE "mips-isel"
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namespace {
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class MipsModuleDAGToDAGISel : public MachineFunctionPass {
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public:
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static char ID;
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MipsModuleDAGToDAGISel() : MachineFunctionPass(ID) {}
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// Pass Name
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StringRef getPassName() const override {
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return "MIPS DAG->DAG Pattern Instruction Selection";
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}
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void getAnalysisUsage(AnalysisUsage &AU) const override {
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AU.addRequired<TargetPassConfig>();
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MachineFunctionPass::getAnalysisUsage(AU);
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}
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bool runOnMachineFunction(MachineFunction &MF) override;
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};
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char MipsModuleDAGToDAGISel::ID = 0;
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}
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bool MipsModuleDAGToDAGISel::runOnMachineFunction(MachineFunction &MF) {
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DEBUG(errs() << "In MipsModuleDAGToDAGISel::runMachineFunction\n");
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auto &TPC = getAnalysis<TargetPassConfig>();
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auto &TM = TPC.getTM<MipsTargetMachine>();
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TM.resetSubtarget(&MF);
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return false;
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}
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llvm::FunctionPass *llvm::createMipsModuleISelDagPass() {
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return new MipsModuleDAGToDAGISel();
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}
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