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Current Path: /usr/src/contrib/llvm-project/llvm/lib/Target/WebAssembly

usr / src / contrib / llvm-project / llvm / lib / Target / WebAssembly /

📁 ..
📁 AsmParser
📁 Disassembler
📁 MCTargetDesc
📄 README.txt(8.34 KB)
📁 TargetInfo
📄 WebAssembly.h(4.05 KB)
📄 WebAssembly.td(4.85 KB)
📄 WebAssemblyAddMissingPrototypes.cpp(5.41 KB)
📄 WebAssemblyArgumentMove.cpp(3.36 KB)
📄 WebAssemblyAsmPrinter.cpp(16.09 KB)
📄 WebAssemblyAsmPrinter.h(3.12 KB)
📄 WebAssemblyCFGSort.cpp(15.94 KB)
📄 WebAssemblyCFGStackify.cpp(55.56 KB)
📄 WebAssemblyDebugFixup.cpp(5.4 KB)
📄 WebAssemblyDebugValueManager.cpp(1.77 KB)
📄 WebAssemblyDebugValueManager.h(1.13 KB)
📄 WebAssemblyExceptionInfo.cpp(6.23 KB)
📄 WebAssemblyExceptionInfo.h(6.24 KB)
📄 WebAssemblyExplicitLocals.cpp(15.04 KB)
📄 WebAssemblyFastISel.cpp(40.39 KB)
📄 WebAssemblyFixBrTableDefaults.cpp(5.81 KB)
📄 WebAssemblyFixFunctionBitcasts.cpp(12.59 KB)
📄 WebAssemblyFixIrreducibleControlFlow.cpp(18.91 KB)
📄 WebAssemblyFrameLowering.cpp(12.68 KB)
📄 WebAssemblyFrameLowering.h(2.98 KB)
📄 WebAssemblyISD.def(1.17 KB)
📄 WebAssemblyISelDAGToDAG.cpp(9.08 KB)
📄 WebAssemblyISelLowering.cpp(68.59 KB)
📄 WebAssemblyISelLowering.h(5.85 KB)
📄 WebAssemblyInstrAtomics.td(48.5 KB)
📄 WebAssemblyInstrBulkMemory.td(2.84 KB)
📄 WebAssemblyInstrCall.td(3.21 KB)
📄 WebAssemblyInstrControl.td(7.93 KB)
📄 WebAssemblyInstrConv.td(14.1 KB)
📄 WebAssemblyInstrFloat.td(6.03 KB)
📄 WebAssemblyInstrFormats.td(3.1 KB)
📄 WebAssemblyInstrInfo.cpp(8.21 KB)
📄 WebAssemblyInstrInfo.h(2.63 KB)
📄 WebAssemblyInstrInfo.td(14.37 KB)
📄 WebAssemblyInstrInteger.td(6.05 KB)
📄 WebAssemblyInstrMemory.td(18.63 KB)
📄 WebAssemblyInstrRef.td(1.15 KB)
📄 WebAssemblyInstrSIMD.td(39.08 KB)
📄 WebAssemblyLateEHPrepare.cpp(14.57 KB)
📄 WebAssemblyLowerBrUnless.cpp(6.21 KB)
📄 WebAssemblyLowerEmscriptenEHSjLj.cpp(45.45 KB)
📄 WebAssemblyLowerGlobalDtors.cpp(7.79 KB)
📄 WebAssemblyMCInstLower.cpp(13.72 KB)
📄 WebAssemblyMCInstLower.h(1.63 KB)
📄 WebAssemblyMachineFunctionInfo.cpp(4.29 KB)
📄 WebAssemblyMachineFunctionInfo.h(6.75 KB)
📄 WebAssemblyMemIntrinsicResults.cpp(7.39 KB)
📄 WebAssemblyOptimizeLiveIntervals.cpp(4.61 KB)
📄 WebAssemblyOptimizeReturned.cpp(2.46 KB)
📄 WebAssemblyPeephole.cpp(6.33 KB)
📄 WebAssemblyPrepareForLiveIntervals.cpp(4.34 KB)
📄 WebAssemblyRegColoring.cpp(6.37 KB)
📄 WebAssemblyRegNumbering.cpp(3.86 KB)
📄 WebAssemblyRegStackify.cpp(38.22 KB)
📄 WebAssemblyRegisterInfo.cpp(6.21 KB)
📄 WebAssemblyRegisterInfo.h(1.74 KB)
📄 WebAssemblyRegisterInfo.td(2.83 KB)
📄 WebAssemblyReplacePhysRegs.cpp(3.89 KB)
📄 WebAssemblyRuntimeLibcallSignatures.cpp(33.82 KB)
📄 WebAssemblyRuntimeLibcallSignatures.h(1.37 KB)
📄 WebAssemblySelectionDAGInfo.cpp(2.57 KB)
📄 WebAssemblySelectionDAGInfo.h(1.94 KB)
📄 WebAssemblySetP2AlignOperands.cpp(3.32 KB)
📄 WebAssemblySubtarget.cpp(2.18 KB)
📄 WebAssemblySubtarget.h(3.88 KB)
📄 WebAssemblyTargetMachine.cpp(18.85 KB)
📄 WebAssemblyTargetMachine.h(2.29 KB)
📄 WebAssemblyTargetObjectFile.cpp(886 B)
📄 WebAssemblyTargetObjectFile.h(959 B)
📄 WebAssemblyTargetTransformInfo.cpp(2.9 KB)
📄 WebAssemblyTargetTransformInfo.h(2.5 KB)
📄 WebAssemblyUtilities.cpp(3.43 KB)
📄 WebAssemblyUtilities.h(1.8 KB)
📄 known_gcc_test_failures.txt(2.07 KB)

Editing: WebAssemblyReplacePhysRegs.cpp

//===-- WebAssemblyReplacePhysRegs.cpp - Replace phys regs with virt regs -===//
//
// 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
//
//===----------------------------------------------------------------------===//
///
/// \file
/// This file implements a pass that replaces physical registers with
/// virtual registers.
///
/// LLVM expects certain physical registers, such as a stack pointer. However,
/// WebAssembly doesn't actually have such physical registers. This pass is run
/// once LLVM no longer needs these registers, and replaces them with virtual
/// registers, so they can participate in register stackifying and coloring in
/// the normal way.
///
//===----------------------------------------------------------------------===//

#include "MCTargetDesc/WebAssemblyMCTargetDesc.h"
#include "WebAssembly.h"
#include "WebAssemblyMachineFunctionInfo.h"
#include "WebAssemblySubtarget.h"
#include "llvm/CodeGen/MachineFunctionPass.h"
#include "llvm/CodeGen/MachineRegisterInfo.h"
#include "llvm/CodeGen/Passes.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/raw_ostream.h"
using namespace llvm;

#define DEBUG_TYPE "wasm-replace-phys-regs"

namespace {
class WebAssemblyReplacePhysRegs final : public MachineFunctionPass {
public:
  static char ID; // Pass identification, replacement for typeid
  WebAssemblyReplacePhysRegs() : MachineFunctionPass(ID) {}

private:
  StringRef getPassName() const override {
    return "WebAssembly Replace Physical Registers";
  }

void getAnalysisUsage(AnalysisUsage &AU) const override {
    AU.setPreservesCFG();
    MachineFunctionPass::getAnalysisUsage(AU);
  }

bool runOnMachineFunction(MachineFunction &MF) override;
};
} // end anonymous namespace

char WebAssemblyReplacePhysRegs::ID = 0;
INITIALIZE_PASS(WebAssemblyReplacePhysRegs, DEBUG_TYPE,
                "Replace physical registers with virtual registers", false,
                false)

FunctionPass *llvm::createWebAssemblyReplacePhysRegs() {
  return new WebAssemblyReplacePhysRegs();
}

bool WebAssemblyReplacePhysRegs::runOnMachineFunction(MachineFunction &MF) {
  LLVM_DEBUG({
    dbgs() << "********** Replace Physical Registers **********\n"
           << "********** Function: " << MF.getName() << '\n';
  });

MachineRegisterInfo &MRI = MF.getRegInfo();
  auto &TRI = *MF.getSubtarget<WebAssemblySubtarget>().getRegisterInfo();
  bool Changed = false;

assert(!mustPreserveAnalysisID(LiveIntervalsID) &&
         "LiveIntervals shouldn't be active yet!");
  // We don't preserve SSA or liveness.
  MRI.leaveSSA();
  MRI.invalidateLiveness();

for (unsigned PReg = WebAssembly::NoRegister + 1;
       PReg < WebAssembly::NUM_TARGET_REGS; ++PReg) {
    // Skip fake registers that are never used explicitly.
    if (PReg == WebAssembly::VALUE_STACK || PReg == WebAssembly::ARGUMENTS)
      continue;

// Replace explicit uses of the physical register with a virtual register.
    const TargetRegisterClass *RC = TRI.getMinimalPhysRegClass(PReg);
    unsigned VReg = WebAssembly::NoRegister;
    for (auto I = MRI.reg_begin(PReg), E = MRI.reg_end(); I != E;) {
      MachineOperand &MO = *I++;
      if (!MO.isImplicit()) {
        if (VReg == WebAssembly::NoRegister) {
          VReg = MRI.createVirtualRegister(RC);
          if (PReg == TRI.getFrameRegister(MF)) {
            auto FI = MF.getInfo<WebAssemblyFunctionInfo>();
            assert(!FI->isFrameBaseVirtual());
            FI->setFrameBaseVreg(VReg);
            LLVM_DEBUG({
              dbgs() << "replacing preg " << PReg << " with " << VReg << " ("
                     << Register::virtReg2Index(VReg) << ")\n";
            });
          }
        }
        MO.setReg(VReg);
        if (MO.getParent()->isDebugValue())
          MO.setIsDebug();
        Changed = true;
      }
    }
  }

return Changed;
}

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Editing: WebAssemblyReplacePhysRegs.cpp

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