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Add module flags metadata to record the settings for enum and wchar width

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Add module flags metadata to record the settings for enum and wchar width,
to allow correct ARM build attribute generation

llvm-svn: 211354
This commit is contained in:
Oliver Stannard
2014-06-20 12:43:07 +00:00
parent c2a363aa33
commit e3a4fb6512
2 changed files with 30 additions and 0 deletions
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17
clang/lib/CodeGen/CodeGenModule.cpp
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@@ -352,6 +352,23 @@ void CodeGenModule::Release() {
getModule().addModuleFlag(llvm::Module::Warning, "Debug Info Version",
llvm::DEBUG_METADATA_VERSION);
// We need to record the widths of enums and wchar_t, so that we can generate
// the correct build attributes in the ARM backend.
llvm::Triple::ArchType Arch = Context.getTargetInfo().getTriple().getArch();
if ( Arch == llvm::Triple::arm
|| Arch == llvm::Triple::armeb
|| Arch == llvm::Triple::thumb
|| Arch == llvm::Triple::thumbeb) {
// Width of wchar_t in bytes
uint64_t WCharWidth =
Context.getTypeSizeInChars(Context.getWideCharType()).getQuantity();
getModule().addModuleFlag(llvm::Module::Error, "wchar_size", WCharWidth);
// The minimum width of an enum in bytes
uint64_t EnumWidth = Context.getLangOpts().ShortEnums ? 1 : 4;
getModule().addModuleFlag(llvm::Module::Error, "min_enum_size", EnumWidth);
}
SimplifyPersonality();
if (getCodeGenOpts().EmitDeclMetadata)