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 "llvm/Support/CodeGen.h" 19 20namespace llvm { 21 22class FunctionPass; 23class ImmutablePass; 24class JITCodeEmitter; 25class X86TargetMachine; 26 27/// createX86AtomicExpandPass - This pass expands atomic operations that cannot 28/// be handled natively in terms of a loop using cmpxchg. 29FunctionPass *createX86AtomicExpandPass(const X86TargetMachine *TM); 30 31/// createX86ISelDag - This pass converts a legalized DAG into a 32/// X86-specific DAG, ready for instruction scheduling. 33/// 34FunctionPass *createX86ISelDag(X86TargetMachine &TM, 35 CodeGenOpt::Level OptLevel); 36 37/// createX86GlobalBaseRegPass - This pass initializes a global base 38/// register for PIC on x86-32. 39FunctionPass* createX86GlobalBaseRegPass(); 40 41/// createCleanupLocalDynamicTLSPass() - This pass combines multiple accesses 42/// to local-dynamic TLS variables so that the TLS base address for the module 43/// is only fetched once per execution path through the function. 44FunctionPass *createCleanupLocalDynamicTLSPass(); 45 46/// createX86FloatingPointStackifierPass - This function returns a pass which 47/// converts floating point register references and pseudo instructions into 48/// floating point stack references and physical instructions. 49/// 50FunctionPass *createX86FloatingPointStackifierPass(); 51 52/// createX86IssueVZeroUpperPass - This pass inserts AVX vzeroupper instructions 53/// before each call to avoid transition penalty between functions encoded with 54/// AVX and SSE. 55FunctionPass *createX86IssueVZeroUpperPass(); 56 57/// createX86CodeEmitterPass - Return a pass that emits the collected X86 code 58/// to the specified MCE object. 59FunctionPass *createX86JITCodeEmitterPass(X86TargetMachine &TM, 60 JITCodeEmitter &JCE); 61 62/// createX86EmitCodeToMemory - Returns a pass that converts a register 63/// allocated function into raw machine code in a dynamically 64/// allocated chunk of memory. 65/// 66FunctionPass *createEmitX86CodeToMemory(); 67 68/// \brief Creates an X86-specific Target Transformation Info pass. 69ImmutablePass *createX86TargetTransformInfoPass(const X86TargetMachine *TM); 70 71/// createX86PadShortFunctions - Return a pass that pads short functions 72/// with NOOPs. This will prevent a stall when returning on the Atom. 73FunctionPass *createX86PadShortFunctions(); 74/// createX86FixupLEAs - Return a a pass that selectively replaces 75/// certain instructions (like add, sub, inc, dec, some shifts, 76/// and some multiplies) by equivalent LEA instructions, in order 77/// to eliminate execution delays in some Atom processors. 78FunctionPass *createX86FixupLEAs(); 79 80} // End llvm namespace 81 82#endif 83