This is the mail archive of the
gcc-patches@gcc.gnu.org
mailing list for the GCC project.
Re: [PATCH] combine lhs zero_extract fix (PR78186)
- From: Segher Boessenkool <segher at kernel dot crashing dot org>
- To: Christophe Lyon <christophe dot lyon at linaro dot org>
- Cc: "gcc-patches at gcc dot gnu dot org" <gcc-patches at gcc dot gnu dot org>
- Date: Mon, 7 Nov 2016 03:14:50 -0600
- Subject: Re: [PATCH] combine lhs zero_extract fix (PR78186)
- Authentication-results: sourceware.org; auth=none
- References: <f367b0a9f3b90af3103f2acb90a4894ab2b568a5.1478188378.git.segher@kernel.crashing.org> <CAKdteObEfiD2Uob0AXtOmxRah=fZs6BO4utcDgwSRgBsyOKWTA@mail.gmail.com>
Hi Christophe,
On Fri, Nov 04, 2016 at 02:31:28PM +0100, Christophe Lyon wrote:
> Since this commit I have noticed execution failures on "old" arm targets:
>
> gcc.dg/torture/pr48124-4.c -O1 execution test
> gcc.dg/torture/pr48124-4.c -O2 execution test
> gcc.dg/torture/pr48124-4.c -O2 -flto -fno-use-linker-plugin
> -flto-partition=none execution test
> gcc.dg/torture/pr48124-4.c -O2 -flto -fuse-linker-plugin
> -fno-fat-lto-objects execution test
> gcc.dg/torture/pr48124-4.c -O3 -g execution test
> gcc.dg/torture/pr48124-4.c -Os execution test
>
> For instance on target arm-none-linux-gnueabi --with-cpu=cortex-a9
> --with-mode=arm
> and running the tests with -march=armv5t
Confirmed. What a nasty, nasty bug, and it has been here for decades
it seems. Could you please open a PR?
Segher