1//===-- X86.h - Top-level interface for X86 representation ------*- C++ -*-===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10// This file contains the entry points for global functions defined in the x86
11// target library, as used by the LLVM JIT.
12//
13//===----------------------------------------------------------------------===//
14
15#ifndef TARGET_X86_H
16#define TARGET_X86_H
17
18#include "MCTargetDesc/X86BaseInfo.h"
19#include "MCTargetDesc/X86MCTargetDesc.h"
20#include "llvm/Support/DataTypes.h"
21#include "llvm/Target/TargetMachine.h"
22
23namespace llvm {
24
25class FunctionPass;
26class JITCodeEmitter;
27class X86TargetMachine;
28
29/// createX86ISelDag - This pass converts a legalized DAG into a
30/// X86-specific DAG, ready for instruction scheduling.
31///
32FunctionPass *createX86ISelDag(X86TargetMachine &TM,
33                               CodeGenOpt::Level OptLevel);
34
35/// createGlobalBaseRegPass - This pass initializes a global base
36/// register for PIC on x86-32.
37FunctionPass* createGlobalBaseRegPass();
38
39/// createCleanupLocalDynamicTLSPass() - This pass combines multiple accesses
40/// to local-dynamic TLS variables so that the TLS base address for the module
41/// is only fetched once per execution path through the function.
42FunctionPass *createCleanupLocalDynamicTLSPass();
43
44/// createX86FloatingPointStackifierPass - This function returns a pass which
45/// converts floating point register references and pseudo instructions into
46/// floating point stack references and physical instructions.
47///
48FunctionPass *createX86FloatingPointStackifierPass();
49
50/// createX86IssueVZeroUpperPass - This pass inserts AVX vzeroupper instructions
51/// before each call to avoid transition penalty between functions encoded with
52/// AVX and SSE.
53FunctionPass *createX86IssueVZeroUpperPass();
54
55/// createX86CodeEmitterPass - Return a pass that emits the collected X86 code
56/// to the specified MCE object.
57FunctionPass *createX86JITCodeEmitterPass(X86TargetMachine &TM,
58                                          JITCodeEmitter &JCE);
59
60/// createX86EmitCodeToMemory - Returns a pass that converts a register
61/// allocated function into raw machine code in a dynamically
62/// allocated chunk of memory.
63///
64FunctionPass *createEmitX86CodeToMemory();
65
66/// \brief Creates an X86-specific Target Transformation Info pass.
67ImmutablePass *createX86TargetTransformInfoPass(const X86TargetMachine *TM);
68
69/// createX86PadShortFunctions - Return a pass that pads short functions
70/// with NOOPs. This will prevent a stall when returning on the Atom.
71FunctionPass *createX86PadShortFunctions();
72
73} // End llvm namespace
74
75#endif
76