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[Bug tree-optimization/48766] [4.6/4.7/4.8 Regression] Infinite recursion in fold_binary_loc()
- From: "hjl.tools at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Mon, 14 Jan 2013 15:48:41 +0000
- Subject: [Bug tree-optimization/48766] [4.6/4.7/4.8 Regression] Infinite recursion in fold_binary_loc()
- Auto-submitted: auto-generated
- References: <bug-48766-4@http.gcc.gnu.org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48766
--- Comment #13 from H.J. Lu <hjl.tools at gmail dot com> 2013-01-14 15:48:41 UTC ---
(In reply to comment #12)
> Created attachment 29161 [details]
> gcc48-pr48766.patch
>
> Untested fix. Seems in the previous option processing the negative options
> cancel their corresponding positive options (and vice versa), and only the last
> occurrence of the option from the command line remains and the patch just
> disables -fwrapv if -ftrapv comes after -fwrapv, and vice versa.
> So e.g.
> -fwrapv -ftrapv -fwrapv results in -fwrapv
> -fwrapv -ftrapv results in -ftrapv
> -fwrapv -ftrapv -fno-wrapv results in -ftrapv
> -ftrapv -fwrapv -fno-trapv results in -fwrapv
> etc.
Why not use Negative in common.opt?