File Manager

003 File Manager

Current Path: /usr/src/contrib/llvm-project/llvm/include/llvm/CodeGen/GlobalISel

usr / src / contrib / llvm-project / llvm / include / llvm / CodeGen / GlobalISel /

📁 ..
📄 CSEInfo.h(8.84 KB)
📄 CSEMIRBuilder.h(4.77 KB)
📄 CallLowering.h(14.21 KB)
📄 Combiner.h(1.43 KB)
📄 CombinerHelper.h(10.74 KB)
📄 CombinerInfo.h(2.75 KB)
📄 ConstantFoldingMIRBuilder.h(2.63 KB)
📄 GISelChangeObserver.h(4.96 KB)
📄 GISelKnownBits.h(4.33 KB)
📄 GISelWorkList.h(3.64 KB)
📄 IRTranslator.h(24.76 KB)
📄 InlineAsmLowering.h(2.34 KB)
📄 InstructionSelect.h(1.96 KB)
📄 InstructionSelector.h(18.61 KB)
📄 InstructionSelectorImpl.h(44.71 KB)
📄 LegalizationArtifactCombiner.h(34.75 KB)
📄 Legalizer.h(2.54 KB)
📄 LegalizerHelper.h(15.8 KB)
📄 LegalizerInfo.h(59.78 KB)
📄 Localizer.h(3.57 KB)
📄 LostDebugLocObserver.h(2.06 KB)
📄 MIPatternMatch.h(11.95 KB)
📄 MachineIRBuilder.h(67.51 KB)
📄 RegBankSelect.h(25.09 KB)
📄 RegisterBank.h(3.18 KB)
📄 RegisterBankInfo.h(30.01 KB)
📄 Utils.h(9.4 KB)

Editing: ConstantFoldingMIRBuilder.h

//===-- llvm/CodeGen/GlobalISel/ConstantFoldingMIRBuilder.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
//
//===----------------------------------------------------------------------===//
/// \file
/// This file implements a version of MachineIRBuilder which does trivial
/// constant folding.
//===----------------------------------------------------------------------===//
#include "llvm/CodeGen/GlobalISel/MachineIRBuilder.h"
#include "llvm/CodeGen/GlobalISel/Utils.h"

namespace llvm {

/// An MIRBuilder which does trivial constant folding of binary ops.
/// Calls to buildInstr will also try to constant fold binary ops.
class ConstantFoldingMIRBuilder : public MachineIRBuilder {
public:
  // Pull in base class constructors.
  using MachineIRBuilder::MachineIRBuilder;

virtual ~ConstantFoldingMIRBuilder() = default;

// Try to provide an overload for buildInstr for binary ops in order to
  // constant fold.
  MachineInstrBuilder buildInstr(unsigned Opc, ArrayRef<DstOp> DstOps,
                                 ArrayRef<SrcOp> SrcOps,
                                 Optional<unsigned> Flags = None) override {
    switch (Opc) {
    default:
      break;
    case TargetOpcode::G_ADD:
    case TargetOpcode::G_AND:
    case TargetOpcode::G_ASHR:
    case TargetOpcode::G_LSHR:
    case TargetOpcode::G_MUL:
    case TargetOpcode::G_OR:
    case TargetOpcode::G_SHL:
    case TargetOpcode::G_SUB:
    case TargetOpcode::G_XOR:
    case TargetOpcode::G_UDIV:
    case TargetOpcode::G_SDIV:
    case TargetOpcode::G_UREM:
    case TargetOpcode::G_SREM: {
      assert(DstOps.size() == 1 && "Invalid dst ops");
      assert(SrcOps.size() == 2 && "Invalid src ops");
      const DstOp &Dst = DstOps[0];
      const SrcOp &Src0 = SrcOps[0];
      const SrcOp &Src1 = SrcOps[1];
      if (auto MaybeCst =
              ConstantFoldBinOp(Opc, Src0.getReg(), Src1.getReg(), *getMRI()))
        return buildConstant(Dst, MaybeCst->getSExtValue());
      break;
    }
    case TargetOpcode::G_SEXT_INREG: {
      assert(DstOps.size() == 1 && "Invalid dst ops");
      assert(SrcOps.size() == 2 && "Invalid src ops");
      const DstOp &Dst = DstOps[0];
      const SrcOp &Src0 = SrcOps[0];
      const SrcOp &Src1 = SrcOps[1];
      if (auto MaybeCst =
              ConstantFoldExtOp(Opc, Src0.getReg(), Src1.getImm(), *getMRI()))
        return buildConstant(Dst, MaybeCst->getSExtValue());
      break;
    }
    }
    return MachineIRBuilder::buildInstr(Opc, DstOps, SrcOps);
  }
};
} // namespace llvm

003 File Manager

Editing: ConstantFoldingMIRBuilder.h

Upload File

Create Folder