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[Bug target/60039] sh3 optimisation bug with -O2
- From: "skrll at netbsd dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Tue, 18 Mar 2014 10:11:49 +0000
- Subject: [Bug target/60039] sh3 optimisation bug with -O2
- Auto-submitted: auto-generated
- References: <bug-60039-4 at http dot gcc dot gnu dot org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60039
--- Comment #8 from Nick Hudson <skrll at netbsd dot org> ---
On 03/18/14 02:34, kkojima at gcc dot gnu.org wrote:
> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60039
>
> --- Comment #7 from Kazumoto Kojima <kkojima at gcc dot gnu.org> ---
> Ugh, then this is an old problem and we've missed to give a correct
> clobber information to udivsi3_i1 insn for PIC. Does the patch
> below fix the issue?
>
> --- gcc/config/sh/sh.md.orig 2013-09-13 17:38:22.000000000 +0900
> +++ gcc/config/sh/sh.md 2014-03-18 11:08:19.868887133 +0900
> @@ -2152,6 +2152,7 @@
> (udiv:SI (reg:SI R4_REG) (reg:SI R5_REG)))
> (clobber (reg:SI T_REG))
> (clobber (reg:SI PR_REG))
> + (clobber (reg:SI R1_REG))
> (clobber (reg:SI R4_REG))
> (use (match_operand:SI 1 "arith_reg_operand" "r"))]
> "TARGET_SH1 && TARGET_DIVIDE_CALL_DIV1"
>
yes, this patch helps ld.elf_so.
I seem to have a different problem in libc now.
Thanks,
Nick