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llvm-mirror/lib/AsmParser/LLToken.h
Chandler Carruth 0e44a1b235 [x86/SLH] Add a real Clang flag and LLVM IR attribute for Speculative 
Load Hardening.

Wires up the existing pass to work with a proper IR attribute rather
than just a hidden/internal flag. The internal flag continues to work
for now, but I'll likely remove it soon.

Most of the churn here is adding the IR attribute. I talked about this
Kristof Beyls and he seemed at least initially OK with this direction.
The idea of using a full attribute here is that we *do* expect at least
some forms of this for other architectures. There isn't anything
*inherently* x86-specific about this technique, just that we only have
an implementation for x86 at the moment.

While we could potentially expose this as a Clang-level attribute as
well, that seems like a good question to defer for the moment as it
isn't 100% clear whether that or some other programmer interface (or
both?) would be best. We'll defer the programmer interface side of this
for now, but at least get to the point where the feature can be enabled
without relying on implementation details.

This also allows us to do something that was really hard before: we can
enable *just* the indirect call retpolines when using SLH. For x86, we
don't have any other way to mitigate indirect calls. Other architectures
may take a different approach of course, and none of this is surfaced to
user-level flags.

Differential Revision: https://reviews.llvm.org/D51157

llvm-svn: 341363
2018-09-04 12:38:00 +00:00

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//===- LLToken.h - Token Codes for LLVM Assembly Files ----------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file defines the enums for the .ll lexer.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_LIB_ASMPARSER_LLTOKEN_H
#define LLVM_LIB_ASMPARSER_LLTOKEN_H
namespace llvm {
namespace lltok {
enum Kind {
// Markers
Eof,
Error,
// Tokens with no info.
dotdotdot, // ...
equal,
comma, // = ,
star, // *
lsquare,
rsquare, // [ ]
lbrace,
rbrace, // { }
less,
greater, // < >
lparen,
rparen, // ( )
exclaim, // !
bar, // |
colon, // :
kw_x,
kw_true,
kw_false,
kw_declare,
kw_define,
kw_global,
kw_constant,
kw_dso_local,
kw_dso_preemptable,
kw_private,
kw_internal,
kw_linkonce,
kw_linkonce_odr,
kw_weak, // Used as a linkage, and a modifier for "cmpxchg".
kw_weak_odr,
kw_appending,
kw_dllimport,
kw_dllexport,
kw_common,
kw_available_externally,
kw_default,
kw_hidden,
kw_protected,
kw_unnamed_addr,
kw_local_unnamed_addr,
kw_externally_initialized,
kw_extern_weak,
kw_external,
kw_thread_local,
kw_localdynamic,
kw_initialexec,
kw_localexec,
kw_zeroinitializer,
kw_undef,
kw_null,
kw_none,
kw_to,
kw_caller,
kw_within,
kw_from,
kw_tail,
kw_musttail,
kw_notail,
kw_target,
kw_triple,
kw_source_filename,
kw_unwind,
kw_deplibs, // FIXME: Remove in 4.0
kw_datalayout,
kw_volatile,
kw_atomic,
kw_unordered,
kw_monotonic,
kw_acquire,
kw_release,
kw_acq_rel,
kw_seq_cst,
kw_syncscope,
kw_nnan,
kw_ninf,
kw_nsz,
kw_arcp,
kw_contract,
kw_reassoc,
kw_afn,
kw_fast,
kw_nuw,
kw_nsw,
kw_exact,
kw_inbounds,
kw_inrange,
kw_align,
kw_addrspace,
kw_section,
kw_alias,
kw_ifunc,
kw_module,
kw_asm,
kw_sideeffect,
kw_alignstack,
kw_inteldialect,
kw_gc,
kw_prefix,
kw_prologue,
kw_c,
kw_cc,
kw_ccc,
kw_fastcc,
kw_coldcc,
kw_intel_ocl_bicc,
kw_x86_stdcallcc,
kw_x86_fastcallcc,
kw_x86_thiscallcc,
kw_x86_vectorcallcc,
kw_x86_regcallcc,
kw_arm_apcscc,
kw_arm_aapcscc,
kw_arm_aapcs_vfpcc,
kw_msp430_intrcc,
kw_avr_intrcc,
kw_avr_signalcc,
kw_ptx_kernel,
kw_ptx_device,
kw_spir_kernel,
kw_spir_func,
kw_x86_64_sysvcc,
kw_win64cc,
kw_webkit_jscc,
kw_anyregcc,
kw_swiftcc,
kw_preserve_mostcc,
kw_preserve_allcc,
kw_ghccc,
kw_x86_intrcc,
kw_hhvmcc,
kw_hhvm_ccc,
kw_cxx_fast_tlscc,
kw_amdgpu_vs,
kw_amdgpu_ls,
kw_amdgpu_hs,
kw_amdgpu_es,
kw_amdgpu_gs,
kw_amdgpu_ps,
kw_amdgpu_cs,
kw_amdgpu_kernel,
// Attributes:
kw_attributes,
kw_allocsize,
kw_alwaysinline,
kw_argmemonly,
kw_sanitize_address,
kw_sanitize_hwaddress,
kw_builtin,
kw_byval,
kw_inalloca,
kw_cold,
kw_convergent,
kw_dereferenceable,
kw_dereferenceable_or_null,
kw_inaccessiblememonly,
kw_inaccessiblemem_or_argmemonly,
kw_inlinehint,
kw_inreg,
kw_jumptable,
kw_minsize,
kw_naked,
kw_nest,
kw_noalias,
kw_nobuiltin,
kw_nocapture,
kw_noduplicate,
kw_noimplicitfloat,
kw_noinline,
kw_norecurse,
kw_nonlazybind,
kw_nonnull,
kw_noredzone,
kw_noreturn,
kw_nocf_check,
kw_nounwind,
kw_optforfuzzing,
kw_optnone,
kw_optsize,
kw_readnone,
kw_readonly,
kw_returned,
kw_returns_twice,
kw_signext,
kw_speculatable,
kw_ssp,
kw_sspreq,
kw_sspstrong,
kw_safestack,
kw_shadowcallstack,
kw_sret,
kw_sanitize_thread,
kw_sanitize_memory,
kw_speculative_load_hardening,
kw_strictfp,
kw_swifterror,
kw_swiftself,
kw_uwtable,
kw_writeonly,
kw_zeroext,
kw_type,
kw_opaque,
kw_comdat,
// Comdat types
kw_any,
kw_exactmatch,
kw_largest,
kw_noduplicates,
kw_samesize,
kw_eq,
kw_ne,
kw_slt,
kw_sgt,
kw_sle,
kw_sge,
kw_ult,
kw_ugt,
kw_ule,
kw_uge,
kw_oeq,
kw_one,
kw_olt,
kw_ogt,
kw_ole,
kw_oge,
kw_ord,
kw_uno,
kw_ueq,
kw_une,
// atomicrmw operations that aren't also instruction keywords.
kw_xchg,
kw_nand,
kw_max,
kw_min,
kw_umax,
kw_umin,
// Instruction Opcodes (Opcode in UIntVal).
kw_add,
kw_fadd,
kw_sub,
kw_fsub,
kw_mul,
kw_fmul,
kw_udiv,
kw_sdiv,
kw_fdiv,
kw_urem,
kw_srem,
kw_frem,
kw_shl,
kw_lshr,
kw_ashr,
kw_and,
kw_or,
kw_xor,
kw_icmp,
kw_fcmp,
kw_phi,
kw_call,
kw_trunc,
kw_zext,
kw_sext,
kw_fptrunc,
kw_fpext,
kw_uitofp,
kw_sitofp,
kw_fptoui,
kw_fptosi,
kw_inttoptr,
kw_ptrtoint,
kw_bitcast,
kw_addrspacecast,
kw_select,
kw_va_arg,
kw_landingpad,
kw_personality,
kw_cleanup,
kw_catch,
kw_filter,
kw_ret,
kw_br,
kw_switch,
kw_indirectbr,
kw_invoke,
kw_resume,
kw_unreachable,
kw_cleanupret,
kw_catchswitch,
kw_catchret,
kw_catchpad,
kw_cleanuppad,
kw_alloca,
kw_load,
kw_store,
kw_fence,
kw_cmpxchg,
kw_atomicrmw,
kw_getelementptr,
kw_extractelement,
kw_insertelement,
kw_shufflevector,
kw_extractvalue,
kw_insertvalue,
kw_blockaddress,
// Metadata types.
kw_distinct,
// Use-list order directives.
kw_uselistorder,
kw_uselistorder_bb,
// Summary index keywords
kw_path,
kw_hash,
kw_gv,
kw_guid,
kw_name,
kw_summaries,
kw_flags,
kw_linkage,
kw_notEligibleToImport,
kw_live,
kw_dsoLocal,
kw_function,
kw_insts,
kw_funcFlags,
kw_readNone,
kw_readOnly,
kw_noRecurse,
kw_returnDoesNotAlias,
kw_calls,
kw_callee,
kw_hotness,
kw_unknown,
kw_hot,
kw_critical,
kw_relbf,
kw_variable,
kw_aliasee,
kw_refs,
kw_typeIdInfo,
kw_typeTests,
kw_typeTestAssumeVCalls,
kw_typeCheckedLoadVCalls,
kw_typeTestAssumeConstVCalls,
kw_typeCheckedLoadConstVCalls,
kw_vFuncId,
kw_offset,
kw_args,
kw_typeid,
kw_summary,
kw_typeTestRes,
kw_kind,
kw_unsat,
kw_byteArray,
kw_inline,
kw_single,
kw_allOnes,
kw_sizeM1BitWidth,
kw_alignLog2,
kw_sizeM1,
kw_bitMask,
kw_inlineBits,
kw_wpdResolutions,
kw_wpdRes,
kw_indir,
kw_singleImpl,
kw_branchFunnel,
kw_singleImplName,
kw_resByArg,
kw_byArg,
kw_uniformRetVal,
kw_uniqueRetVal,
kw_virtualConstProp,
kw_info,
kw_byte,
kw_bit,
// Unsigned Valued tokens (UIntVal).
GlobalID, // @42
LocalVarID, // %42
AttrGrpID, // #42
SummaryID, // ^42
// String valued tokens (StrVal).
LabelStr, // foo:
GlobalVar, // @foo @"foo"
ComdatVar, // $foo
LocalVar, // %foo %"foo"
MetadataVar, // !foo
StringConstant, // "foo"
DwarfTag, // DW_TAG_foo
DwarfAttEncoding, // DW_ATE_foo
DwarfVirtuality, // DW_VIRTUALITY_foo
DwarfLang, // DW_LANG_foo
DwarfCC, // DW_CC_foo
EmissionKind, // lineTablesOnly
NameTableKind, // GNU
DwarfOp, // DW_OP_foo
DIFlag, // DIFlagFoo
DwarfMacinfo, // DW_MACINFO_foo
ChecksumKind, // CSK_foo
// Type valued tokens (TyVal).
Type,
APFloat, // APFloatVal
APSInt // APSInt
};
} // end namespace lltok
} // end namespace llvm
#endif
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