LLVM  14.0.0git
X86InstrFoldTables.h
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1 //===-- X86InstrFoldTables.h - X86 Instruction Folding Tables ---*- C++ -*-===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 //
9 // This file contains the interface to query the X86 memory folding tables.
10 //
11 //===----------------------------------------------------------------------===//
12 
13 #ifndef LLVM_LIB_TARGET_X86_X86INSTRFOLDTABLES_H
14 #define LLVM_LIB_TARGET_X86_X86INSTRFOLDTABLES_H
15 
16 #include <cstdint>
17 
18 namespace llvm {
19 
20 enum {
21  // Select which memory operand is being unfolded.
22  // (stored in bits 0 - 2)
29 
30  // Do not insert the reverse map (MemOp -> RegOp) into the table.
31  // This may be needed because there is a many -> one mapping.
32  TB_NO_REVERSE = 1 << 3,
33 
34  // Do not insert the forward map (RegOp -> MemOp) into the table.
35  // This is needed for Native Client, which prohibits branch
36  // instructions from using a memory operand.
37  TB_NO_FORWARD = 1 << 4,
38 
39  TB_FOLDED_LOAD = 1 << 5,
40  TB_FOLDED_STORE = 1 << 6,
41  TB_FOLDED_BCAST = 1 << 7,
42 
43  // Minimum alignment required for load/store.
44  // Used for RegOp->MemOp conversion. Encoded as Log2(Align) + 1 to allow 0
45  // to mean align of 0.
46  // (stored in bits 8 - 11)
53 
54  // Broadcast type.
55  // (stored in bits 12 - 13)
62 
63  // Unused bits 14-15
64 };
65 
66 // This struct is used for both the folding and unfold tables. They KeyOp
67 // is used to determine the sorting order.
72 
73  bool operator<(const X86MemoryFoldTableEntry &RHS) const {
74  return KeyOp < RHS.KeyOp;
75  }
76  bool operator==(const X86MemoryFoldTableEntry &RHS) const {
77  return KeyOp == RHS.KeyOp;
78  }
79  friend bool operator<(const X86MemoryFoldTableEntry &TE, unsigned Opcode) {
80  return TE.KeyOp < Opcode;
81  }
82 };
83 
84 // Look up the memory folding table entry for folding a load and a store into
85 // operand 0.
86 const X86MemoryFoldTableEntry *lookupTwoAddrFoldTable(unsigned RegOp);
87 
88 // Look up the memory folding table entry for folding a load or store with
89 // operand OpNum.
90 const X86MemoryFoldTableEntry *lookupFoldTable(unsigned RegOp, unsigned OpNum);
91 
92 // Look up the memory unfolding table entry for this instruction.
93 const X86MemoryFoldTableEntry *lookupUnfoldTable(unsigned MemOp);
94 
95 } // namespace llvm
96 
97 #endif
llvm::TB_BCAST_SD
@ TB_BCAST_SD
Definition: X86InstrFoldTables.h:60
llvm::TB_BCAST_MASK
@ TB_BCAST_MASK
Definition: X86InstrFoldTables.h:61
llvm::TB_BCAST_TYPE_SHIFT
@ TB_BCAST_TYPE_SHIFT
Definition: X86InstrFoldTables.h:56
llvm::lookupTwoAddrFoldTable
const X86MemoryFoldTableEntry * lookupTwoAddrFoldTable(unsigned RegOp)
Definition: X86InstrFoldTables.cpp:6079
llvm::TB_ALIGN_NONE
@ TB_ALIGN_NONE
Definition: X86InstrFoldTables.h:48
llvm
This file implements support for optimizing divisions by a constant.
Definition: AllocatorList.h:23
llvm::TB_ALIGN_SHIFT
@ TB_ALIGN_SHIFT
Definition: X86InstrFoldTables.h:47
llvm::X86MemoryFoldTableEntry::operator==
bool operator==(const X86MemoryFoldTableEntry &RHS) const
Definition: X86InstrFoldTables.h:76
llvm::TB_ALIGN_MASK
@ TB_ALIGN_MASK
Definition: X86InstrFoldTables.h:52
llvm::TB_BCAST_D
@ TB_BCAST_D
Definition: X86InstrFoldTables.h:57
llvm::TB_INDEX_4
@ TB_INDEX_4
Definition: X86InstrFoldTables.h:27
llvm::TB_FOLDED_LOAD
@ TB_FOLDED_LOAD
Definition: X86InstrFoldTables.h:39
llvm::X86MemoryFoldTableEntry::DstOp
uint16_t DstOp
Definition: X86InstrFoldTables.h:70
llvm::TB_ALIGN_64
@ TB_ALIGN_64
Definition: X86InstrFoldTables.h:51
llvm::TB_INDEX_2
@ TB_INDEX_2
Definition: X86InstrFoldTables.h:25
llvm::lookupFoldTable
const X86MemoryFoldTableEntry * lookupFoldTable(unsigned RegOp, unsigned OpNum)
Definition: X86InstrFoldTables.cpp:6084
llvm::TB_BCAST_SS
@ TB_BCAST_SS
Definition: X86InstrFoldTables.h:59
llvm::X86MemoryFoldTableEntry::Flags
uint16_t Flags
Definition: X86InstrFoldTables.h:71
llvm::TB_INDEX_1
@ TB_INDEX_1
Definition: X86InstrFoldTables.h:24
llvm::TB_INDEX_0
@ TB_INDEX_0
Definition: X86InstrFoldTables.h:23
llvm::TB_BCAST_Q
@ TB_BCAST_Q
Definition: X86InstrFoldTables.h:58
llvm::X86MemoryFoldTableEntry::KeyOp
uint16_t KeyOp
Definition: X86InstrFoldTables.h:69
llvm::TB_FOLDED_BCAST
@ TB_FOLDED_BCAST
Definition: X86InstrFoldTables.h:41
llvm::TB_INDEX_3
@ TB_INDEX_3
Definition: X86InstrFoldTables.h:26
llvm::TB_ALIGN_16
@ TB_ALIGN_16
Definition: X86InstrFoldTables.h:49
llvm::lookupUnfoldTable
const X86MemoryFoldTableEntry * lookupUnfoldTable(unsigned MemOp)
Definition: X86InstrFoldTables.cpp:6165
llvm::TB_INDEX_MASK
@ TB_INDEX_MASK
Definition: X86InstrFoldTables.h:28
llvm::X86MemoryFoldTableEntry
Definition: X86InstrFoldTables.h:68
llvm::TB_NO_FORWARD
@ TB_NO_FORWARD
Definition: X86InstrFoldTables.h:37
llvm::TB_NO_REVERSE
@ TB_NO_REVERSE
Definition: X86InstrFoldTables.h:32
uint16_t
llvm::TB_ALIGN_32
@ TB_ALIGN_32
Definition: X86InstrFoldTables.h:50
llvm::X86MemoryFoldTableEntry::operator<
bool operator<(const X86MemoryFoldTableEntry &RHS) const
Definition: X86InstrFoldTables.h:73
llvm::X86MemoryFoldTableEntry::operator<
friend bool operator<(const X86MemoryFoldTableEntry &TE, unsigned Opcode)
Definition: X86InstrFoldTables.h:79
llvm::TB_FOLDED_STORE
@ TB_FOLDED_STORE
Definition: X86InstrFoldTables.h:40