[PATCH] D11778: Improvements on Diagnostic in Macro Expansions

[Zhengkai Wu]

zhengkai created this revision.
zhengkai added a reviewer: rtrieu.
zhengkai added a subscriber: cfe-commits.

Add two helper functions to check if the current macro expansion contains enough information for the error/warning message that we don't need further expansion.

Modify two test files which generates too verbose information in macros.

Add two test files. reduced-diags-macros is to check the different solutions when different error messages are generated. reduced-diags-macros-backtrace is to check the correctness of macro back trace limits in our new methods.

http://reviews.llvm.org/D11778

Files:
  lib/Frontend/DiagnosticRenderer.cpp
  test/Misc/diag-presumed.c
  test/Misc/reduced-diags-macros-backtrace.cpp
  test/Misc/reduced-diags-macros.cpp
  test/Preprocessor/macro_arg_slocentry_merge.c

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