X86InstrFoldTables.h

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//===-- X86InstrFoldTables.h - X86 Instruction Folding Tables ---*- 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
//
//===----------------------------------------------------------------------===//
//
// This file contains the interface to query the X86 memory folding tables.
//
//===----------------------------------------------------------------------===//
 
#ifndef LLVM_LIB_TARGET_X86_X86INSTRFOLDTABLES_H
#define LLVM_LIB_TARGET_X86_X86INSTRFOLDTABLES_H
 
#include <cstdint>
#include "llvm/Support/X86FoldTablesUtils.h"
 
namespace llvm {
 
// This struct is used for both the folding and unfold tables. They KeyOp
// is used to determine the sorting order.
struct X86MemoryFoldTableEntry {
  uint16_t KeyOp;
  uint16_t DstOp;
  uint16_t Flags;
 
  bool operator<(const X86MemoryFoldTableEntry &RHS) const {
    return KeyOp < RHS.KeyOp;
  }
  bool operator==(const X86MemoryFoldTableEntry &RHS) const {
    return KeyOp == RHS.KeyOp;
  }
  friend bool operator<(const X86MemoryFoldTableEntry &TE, unsigned Opcode) {
    return TE.KeyOp < Opcode;
  }
};
 
// Look up the memory folding table entry for folding a load and a store into
// operand 0.
const X86MemoryFoldTableEntry *lookupTwoAddrFoldTable(unsigned RegOp);
 
// Look up the memory folding table entry for folding a load or store with
// operand OpNum.
const X86MemoryFoldTableEntry *lookupFoldTable(unsigned RegOp, unsigned OpNum);
 
// Look up the memory unfolding table entry for this instruction.
const X86MemoryFoldTableEntry *lookupUnfoldTable(unsigned MemOp);
 
} // namespace llvm
 
#endif