r302012 - Undo turning ExtBehavior into a bitfield.

[Daniel Jasper via cfe-commits]

Author: djasper
Date: Wed May  3 06:27:34 2017
New Revision: 302012

URL: http://llvm.org/viewvc/llvm-project?rev=302012&view=rev
Log:
Undo turning ExtBehavior into a bitfield.

This produces warnings that I can't explain in a GCC build:

In file included from ../tools/clang/include/clang/Lex/LexDiagnostic.h:13:0,
                 from /usr/local/google/home/djasper/llvm/tools/clang/lib/Lex/PTHLexer.cpp:19:
../tools/clang/include/clang/Basic/Diagnostic.h:219:34: warning: ‘clang::DiagnosticsEngine::DiagState::ExtBehavior’ is too small to hold all values of ‘enum class clang::diag::Severity’ [enabled by default]
     diag::Severity ExtBehavior : 4;     // Map extensions to warnings or errors?
                                  ^

While I don't think this warning makes sense, I'd like to get this back to being
warning-free. This only seems to trigger for "enum class".

Reproducer:
https://godbolt.org/g/P2ekVd

Modified:
    cfe/trunk/include/clang/Basic/Diagnostic.h

Modified: cfe/trunk/include/clang/Basic/Diagnostic.h
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/include/clang/Basic/Diagnostic.h?rev=302012&r1=302011&r2=302012&view=diff
==============================================================================
--- cfe/trunk/include/clang/Basic/Diagnostic.h (original)
+++ cfe/trunk/include/clang/Basic/Diagnostic.h Wed May  3 06:27:34 2017
@@ -216,7 +216,7 @@ private:
     unsigned WarningsAsErrors : 1;       // Treat warnings like errors.
     unsigned ErrorsAsFatal : 1;          // Treat errors like fatal errors.
     unsigned SuppressSystemWarnings : 1; // Suppress warnings in system headers.
-    diag::Severity ExtBehavior : 4;     // Map extensions to warnings or errors?
+    diag::Severity ExtBehavior;         // Map extensions to warnings or errors?
 
     DiagState()
         : IgnoreAllWarnings(false), EnableAllWarnings(false),