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//===-- X86.h - Top-level interface for X86 representation ------*- C++ -*-===//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See 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 instruments the function prolog to save the return address to a
/// 'shadow call stack' and the function epilog to check that the return address
/// did not change during function execution.
FunctionPass *createShadowCallStackPass();
/// 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 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 initializeShadowCallStackPass(PassRegistry &);
void initializeWinEHStatePassPass(PassRegistry &);
void initializeX86AvoidSFBPassPass(PassRegistry &);
void initializeX86CallFrameOptimizationPass(PassRegistry &);
void initializeX86CmovConverterPassPass(PassRegistry &);
void initializeX86CondBrFoldingPassPass(PassRegistry &);
void initializeX86DomainReassignmentPass(PassRegistry &);
void initializeX86ExecutionDomainFixPass(PassRegistry &);
void initializeX86FlagsCopyLoweringPassPass(PassRegistry &);
void initializeX86SpeculativeLoadHardeningPassPass(PassRegistry &);
} // End llvm namespace