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[Driver] Add a cc1 flag for the new TBAA metadata format 

This patch starts a series of changes to add support for the new
TBAA metadata format proposed in this llvm-dev thread:

http://lists.llvm.org/pipermail/llvm-dev/2017-November/118748.html

Differential Revision: https://reviews.llvm.org/D39955

llvm-svn: 318644
This commit is contained in:
Ivan A. Kosarev 2017-11-20 11:16:16 +00:00
parent 3ac504035a
commit fa03a6a034
3 changed files with 5 additions and 0 deletions
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2
clang/include/clang/Driver/CC1Options.td
View File

@ -244,6 +244,8 @@ def relaxed_aliasing : Flag<["-"], "relaxed-aliasing">,
HelpText<"Turn off Type Based Alias Analysis">;
def no_struct_path_tbaa : Flag<["-"], "no-struct-path-tbaa">,
HelpText<"Turn off struct-path aware Type Based Alias Analysis">;
def new_struct_path_tbaa : Flag<["-"], "new-struct-path-tbaa">,
HelpText<"Enable enhanced struct-path aware Type Based Alias Analysis">;
def masm_verbose : Flag<["-"], "masm-verbose">,
HelpText<"Generate verbose assembly output">;
def mcode_model : Separate<["-"], "mcode-model">,

1
clang/include/clang/Frontend/CodeGenOptions.def
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@ -144,6 +144,7 @@ ENUM_CODEGENOPT(StructReturnConvention, StructReturnConventionKind, 2, SRCK_Defa
CODEGENOPT(RelaxAll , 1, 0) ///< Relax all machine code instructions.
CODEGENOPT(RelaxedAliasing , 1, 0) ///< Set when -fno-strict-aliasing is enabled.
CODEGENOPT(StructPathTBAA , 1, 0) ///< Whether or not to use struct-path TBAA.
CODEGENOPT(NewStructPathTBAA , 1, 0) ///< Whether or not to use enhanced struct-path TBAA.
CODEGENOPT(SaveTempLabels , 1, 0) ///< Save temporary labels.
CODEGENOPT(SanitizeAddressUseAfterScope , 1, 0) ///< Enable use-after-scope detection
///< in AddressSanitizer

2
clang/lib/Frontend/CompilerInvocation.cpp
View File

@ -546,6 +546,8 @@ static bool ParseCodeGenArgs(CodeGenOptions &Opts, ArgList &Args, InputKind IK,
OPT_fuse_register_sized_bitfield_access);
Opts.RelaxedAliasing = Args.hasArg(OPT_relaxed_aliasing);
Opts.StructPathTBAA = !Args.hasArg(OPT_no_struct_path_tbaa);
Opts.NewStructPathTBAA = !Args.hasArg(OPT_no_struct_path_tbaa) &&
Args.hasArg(OPT_new_struct_path_tbaa);
Opts.FineGrainedBitfieldAccesses =
Args.hasFlag(OPT_ffine_grained_bitfield_accesses,
OPT_fno_fine_grained_bitfield_accesses, false);