[PATCH] Prevent clang from throwing the diagnostics twice.

[Umesh Kalappa]

Hi All,

Clang pop up with the  "error: invalid integral value" diagnostics  twice
,when you enable the optimization  through  -O with a  non-integer value
 i.e -O<non integer>  as show below

$ clang -Of -S test.c
error: invalid integral value 'f' in '-Of'
error: invalid integral value 'f' in '-Of'


Attached patch fix the issue as

$ clang -Of -S test.c
error: invalid integral value 'f' in '-Of'


Clang version
clang version 3.4
(http://llvm.org/git/clang.git26297f57634994b4ae47a0774c372d6944265bb2)
(
http://llvm.org/git/llvm.git 868e74bdce7a2c49d60e2ef56a077b0aa7f2ba08)

Target: i386-pc-linux-gnu
Thread model: posix

Builded successfully on trunk and is it ok to commit ??


Thanks
~Umesh
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