[clang] Add ParserConversionAction (PR #169803)

[Sergei Barannikov via cfe-commits]

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@@ -564,6 +564,9 @@ unsigned Parser::ParseAttributeArgsCommon(
               nullptr,
               Sema::ExpressionEvaluationContextRecord::EK_AttrArgument);
 
+          SaveAndRestore<ConversionAction> SavedTranslationState(
+              ParserConversionAction, CA_NoConversion);
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s-barannikov wrote:

> The asm statement may load the value in an escape sequence into a register 

> Note, that support for generating assembly output with -S is still a work in progress. The output isn't entirely valid hlasm syntax yet.

Thanks, that clarifies things.

> It would be nice to have a pragma or attribute syntax that allows someone mix encodings of string literals within a single compilation unit. 

MSVC has `#pragma code_page` that seems to do exactly that, but I'm not sure if it can be used outside resource (*.rc) files. I agree it would be nice to have something similar.


https://github.com/llvm/llvm-project/pull/169803