1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
| //===-- X86.h - Top-level interface for X86 representation ------*- 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 entry points for global functions defined in the x86
// target library, as used by the LLVM JIT.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_LIB_TARGET_X86_X86_H
#define LLVM_LIB_TARGET_X86_X86_H
#include "llvm/Support/CodeGen.h"
namespace llvm {
class FunctionPass;
class ImmutablePass;
class InstructionSelector;
class ModulePass;
class PassRegistry;
class X86RegisterBankInfo;
class X86Subtarget;
class X86TargetMachine;
/// This pass converts a legalized DAG into a X86-specific DAG, ready for
/// instruction scheduling.
FunctionPass *createX86ISelDag(X86TargetMachine &TM,
CodeGenOpt::Level OptLevel);
/// This pass initializes a global base register for PIC on x86-32.
FunctionPass *createX86GlobalBaseRegPass();
/// This pass combines multiple accesses to local-dynamic TLS variables so that
/// the TLS base address for the module is only fetched once per execution path
/// through the function.
FunctionPass *createCleanupLocalDynamicTLSPass();
/// This function returns a pass which converts floating-point register
/// references and pseudo instructions into floating-point stack references and
/// physical instructions.
FunctionPass *createX86FloatingPointStackifierPass();
/// This pass inserts AVX vzeroupper instructions before each call to avoid
/// transition penalty between functions encoded with AVX and SSE.
FunctionPass *createX86IssueVZeroUpperPass();
/// This pass inserts ENDBR instructions before indirect jump/call
/// destinations as part of CET IBT mechanism.
FunctionPass *createX86IndirectBranchTrackingPass();
/// Return a pass that pads short functions with NOOPs.
/// This will prevent a stall when returning on the Atom.
FunctionPass *createX86PadShortFunctions();
/// Return a pass that selectively replaces certain instructions (like add,
/// sub, inc, dec, some shifts, and some multiplies) by equivalent LEA
/// instructions, in order to eliminate execution delays in some processors.
FunctionPass *createX86FixupLEAs();
/// Return a pass that removes redundant LEA instructions and redundant address
/// recalculations.
FunctionPass *createX86OptimizeLEAs();
/// Return a pass that transforms setcc + movzx pairs into xor + setcc.
FunctionPass *createX86FixupSetCC();
/// Return a pass that folds conditional branch jumps.
FunctionPass *createX86CondBrFolding();
/// Return a pass that avoids creating store forward block issues in the hardware.
FunctionPass *createX86AvoidStoreForwardingBlocks();
/// Return a pass that lowers EFLAGS copy pseudo instructions.
FunctionPass *createX86FlagsCopyLoweringPass();
/// Return a pass that expands WinAlloca pseudo-instructions.
FunctionPass *createX86WinAllocaExpander();
/// Return a pass that inserts int3 at the end of the function if it ends with a
/// CALL instruction. The pass does the same for each funclet as well. This
/// ensures that the open interval of function start and end PCs contains all
/// return addresses for the benefit of the Windows x64 unwinder.
FunctionPass *createX86AvoidTrailingCallPass();
/// Return a pass that optimizes the code-size of x86 call sequences. This is
/// done by replacing esp-relative movs with pushes.
FunctionPass *createX86CallFrameOptimization();
/// Return an IR pass that inserts EH registration stack objects and explicit
/// EH state updates. This pass must run after EH preparation, which does
/// Windows-specific but architecture-neutral preparation.
FunctionPass *createX86WinEHStatePass();
/// Return a Machine IR pass that expands X86-specific pseudo
/// instructions into a sequence of actual instructions. This pass
/// must run after prologue/epilogue insertion and before lowering
/// the MachineInstr to MC.
FunctionPass *createX86ExpandPseudoPass();
/// This pass converts X86 cmov instructions into branch when profitable.
FunctionPass *createX86CmovConverterPass();
/// Return a Machine IR pass that selectively replaces
/// certain byte and word instructions by equivalent 32 bit instructions,
/// in order to eliminate partial register usage, false dependences on
/// the upper portions of registers, and to save code size.
FunctionPass *createX86FixupBWInsts();
/// Return a Machine IR pass that reassigns instruction chains from one domain
/// to another, when profitable.
FunctionPass *createX86DomainReassignmentPass();
/// This pass replaces EVEX encoded of AVX-512 instructiosn by VEX
/// encoding when possible in order to reduce code size.
FunctionPass *createX86EvexToVexInsts();
/// This pass creates the thunks for the retpoline feature.
FunctionPass *createX86RetpolineThunksPass();
/// This pass ensures instructions featuring a memory operand
/// have distinctive <LineNumber, Discriminator> (with respect to eachother)
FunctionPass *createX86DiscriminateMemOpsPass();
/// This pass applies profiling information to insert cache prefetches.
FunctionPass *createX86InsertPrefetchPass();
InstructionSelector *createX86InstructionSelector(const X86TargetMachine &TM,
X86Subtarget &,
X86RegisterBankInfo &);
FunctionPass *createX86SpeculativeLoadHardeningPass();
void initializeEvexToVexInstPassPass(PassRegistry &);
void initializeFixupBWInstPassPass(PassRegistry &);
void initializeFixupLEAPassPass(PassRegistry &);
void initializeFPSPass(PassRegistry &);
void initializeWinEHStatePassPass(PassRegistry &);
void initializeX86AvoidSFBPassPass(PassRegistry &);
void initializeX86CallFrameOptimizationPass(PassRegistry &);
void initializeX86CmovConverterPassPass(PassRegistry &);
void initializeX86CondBrFoldingPassPass(PassRegistry &);
void initializeX86DomainReassignmentPass(PassRegistry &);
void initializeX86ExecutionDomainFixPass(PassRegistry &);
void initializeX86ExpandPseudoPass(PassRegistry &);
void initializeX86FlagsCopyLoweringPassPass(PassRegistry &);
void initializeX86OptimizeLEAPassPass(PassRegistry &);
void initializeX86SpeculativeLoadHardeningPassPass(PassRegistry &);
} // End llvm namespace
#endif
|