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[Bug target/18910] [4.0 Regression] unrecognisable insn in regclass on x86/amd64
- From: "pinskia at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 10 Dec 2004 14:18:41 -0000
- Subject: [Bug target/18910] [4.0 Regression] unrecognisable insn in regclass on x86/amd64
- References: <20041209200756.18910.pluto@pld-linux.org>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Additional Comments From pinskia at gcc dot gnu dot org 2004-12-10 14:18 -------
(In reply to comment #9)
> The fail dates from comment #3 probably refer to this change
>
> 2004-10-17 Andrew Pinski <pinskia@physics.uc.edu>
>
> * c-typeck.c (default_function_array_conversion): Always create
> &a[0] for array types.
> (build_unary_op): Do not fold &a[x] into a + x.
>
> which was reverted again on the same day. Can someone try with the reghunter
> to see if it failed before October 17 also?
What this tells me it is a latent bug in x86/x86_64 back-end as my change should not change what RTL
is produced as it is the back-end's job to reject addressing modes.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18910