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 
23 namespace llvm {
24 
25 class FunctionPass;
26 class JITCodeEmitter;
27 class MachineCodeEmitter;
28 class Target;
29 class X86TargetMachine;
30 
31 /// createX86ISelDag - This pass converts a legalized DAG into a
32 /// X86-specific DAG, ready for instruction scheduling.
33 ///
34 FunctionPass *createX86ISelDag(X86TargetMachine &TM,
35                                CodeGenOpt::Level OptLevel);
36 
37 /// createGlobalBaseRegPass - This pass initializes a global base
38 /// register for PIC on x86-32.
39 FunctionPass* createGlobalBaseRegPass();
40 
41 /// createX86FloatingPointStackifierPass - This function returns a pass which
42 /// converts floating point register references and pseudo instructions into
43 /// floating point stack references and physical instructions.
44 ///
45 FunctionPass *createX86FloatingPointStackifierPass();
46 
47 /// createX86IssueVZeroUpperPass - This pass inserts AVX vzeroupper instructions
48 /// before each call to avoid transition penalty between functions encoded with
49 /// AVX and SSE.
50 FunctionPass *createX86IssueVZeroUpperPass();
51 
52 /// createX86CodeEmitterPass - Return a pass that emits the collected X86 code
53 /// to the specified MCE object.
54 FunctionPass *createX86JITCodeEmitterPass(X86TargetMachine &TM,
55                                           JITCodeEmitter &JCE);
56 
57 /// createX86EmitCodeToMemory - Returns a pass that converts a register
58 /// allocated function into raw machine code in a dynamically
59 /// allocated chunk of memory.
60 ///
61 FunctionPass *createEmitX86CodeToMemory();
62 
63 /// createX86MaxStackAlignmentHeuristicPass - This function returns a pass
64 /// which determines whether the frame pointer register should be
65 /// reserved in case dynamic stack alignment is later required.
66 ///
67 FunctionPass *createX86MaxStackAlignmentHeuristicPass();
68 
69 } // End llvm namespace
70 
71 #endif
72