rnk added a comment.
I did some digging and I figured out where things go wrong. The issue is the
repeated string-izing of the macro argument, the repetition of `#func` here.
This hacky patch seems to fix the issue:
diff --git a/clang/lib/Lex/MacroArgs.cpp b/clang/lib/Lex/MacroArgs.cpp
index 5aa4679fad4..29fd25a43bb 100644
--- a/clang/lib/Lex/MacroArgs.cpp
+++ b/clang/lib/Lex/MacroArgs.cpp
@@ -318,7 +318,7 @@ const Token &MacroArgs::getStringifiedArgument(unsigned
ArgNo,
if (StringifiedArgs.empty())
StringifiedArgs.resize(getNumMacroArguments(), {});
- if (StringifiedArgs[ArgNo].isNot(tok::string_literal))
+ //if (StringifiedArgs[ArgNo].isNot(tok::string_literal))
StringifiedArgs[ArgNo] = StringifyArgument(getUnexpArgument(ArgNo), PP,
/*Charify=*/false,
ExpansionLocStart,
Basically, the second time we process a string-ized macro argument, we hit the
cache, which uses the wrong expansion location for the second expansion. I'm
going to try cleaning this up and we'll see if the cache is really needed.
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D65426/new/
https://reviews.llvm.org/D65426
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