[PATCH] D151741: [Lex] Only warn on defining or undefining language-defined builtins

[Nick Desaulniers via Phabricator via cfe-commits]

nickdesaulniers added inline comments.


================
Comment at: clang/test/Preprocessor/macro-reserved.c:19
 #undef __STDC_HOSTED__ // expected-warning {{undefining builtin macro}}
+#undef __INT32_TYPE__
 
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Please add tests for the rest of https://reviews.llvm.org/D144654#4381893. 
AFAICT, `i386` requires `-m32` to be defined in the first place.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D151741/new/

https://reviews.llvm.org/D151741

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