107 lines
4.0 KiB
C++
107 lines
4.0 KiB
C++
//===-- X86.h - Top-level interface for X86 representation ------*- C++ -*-===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// 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 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();
|
|
|
|
/// 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 expands WinAlloca pseudo-instructions.
|
|
FunctionPass *createX86WinAllocaExpander();
|
|
|
|
/// 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();
|
|
|
|
/// 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();
|
|
|
|
void initializeFixupBWInstPassPass(PassRegistry &);
|
|
|
|
/// This pass replaces EVEX ecnoded of AVX-512 instructiosn by VEX
|
|
/// encoding when possible in order to reduce code size.
|
|
FunctionPass *createX86EvexToVexInsts();
|
|
|
|
InstructionSelector *createX86InstructionSelector(const X86TargetMachine &TM,
|
|
X86Subtarget &,
|
|
X86RegisterBankInfo &);
|
|
|
|
void initializeEvexToVexInstPassPass(PassRegistry &);
|
|
|
|
} // End llvm namespace
|
|
|
|
#endif
|