> Seconded.  The warning should take into account existing practices instead
> of forcing the user to make completely bogus changes to the code (and Ada
> should have been tested before the patch was approved).

I have a bootstrap failure on x86-64/Linux:

/home/eric/svn/gcc/gcc/combine.c: In function 'rtx_code 
simplify_comparison(rtx_code, rtx_def**, rtx_def**)':
/home/eric/svn/gcc/gcc/combine.c:11928:11: error: this statement may fall 
through [-Werror=implicit-fallthrough]
      break;
           ^
/home/eric/svn/gcc/gcc/combine.c:11932:2: note: here
  case ZERO_EXTEND:
  ^~~~
/home/eric/svn/gcc/gcc/combine.c:12340:6: error: this statement may fall 
through [-Werror=implicit-fallthrough]
      }
      ^
/home/eric/svn/gcc/gcc/combine.c:12343:2: note: here
  case LSHIFTRT:
  ^~~~

          /* ... fall through ...  */

          /* ... fall through ...  */

-- 
Eric Botcazou

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