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Re: [PATCH] Fix PRs 66502 and 67167
- From: Jiong Wang <jiong dot wang at arm dot com>
- To: Richard Biener <rguenther at suse dot de>
- Cc: "gcc-patches\ at gcc dot gnu dot org" <gcc-patches at gcc dot gnu dot org>
- Date: Fri, 21 Aug 2015 10:47:16 +0100
- Subject: Re: [PATCH] Fix PRs 66502 and 67167
- Authentication-results: sourceware.org; auth=none
- References: <alpine dot LSU dot 2 dot 11 dot 1508130901080 dot 19998 at zhemvz dot fhfr dot qr> <n99h9ntgfbf dot fsf at arm dot com> <alpine dot LSU dot 2 dot 11 dot 1508211142240 dot 4884 at zhemvz dot fhfr dot qr>
Richard Biener writes:
> I see the following ICE:
>
> t.c:13:1: internal compiler error: in decompose_normal_address, at
> rtlanal.c:6090
> }
> ^
> 0xc94a37 decompose_normal_address
> /space/rguenther/tramp3d/trunk/gcc/rtlanal.c:6090
> 0xc94d25 decompose_address(address_info*, rtx_def**, machine_mode,
> unsigned char, rtx_code)
> /space/rguenther/tramp3d/trunk/gcc/rtlanal.c:6167
> 0xc94dc3 decompose_mem_address(address_info*, rtx_def*)
> /space/rguenther/tramp3d/trunk/gcc/rtlanal.c:6187
> 0xb61149 process_address_1
> /space/rguenther/tramp3d/trunk/gcc/lra-constraints.c:2867
> 0xb61c4e process_address
> /space/rguenther/tramp3d/trunk/gcc/lra-constraints.c:3124
> 0xb62607 curr_insn_transform
> /space/rguenther/tramp3d/trunk/gcc/lra-constraints.c:3419
> 0xb65250 lra_constraints(bool)
> /space/rguenther/tramp3d/trunk/gcc/lra-constraints.c:4421
>
> that looks like a latent issue to me in an area of GCC I am not
> familiar with. I suggest to open a bugreport and CC Vladimir.
Thanks for the info. Done https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67305
>
> The r226850 change caused us to eliminate an induction variable
> early (I suspect IVOPTs would have done this later anyway, but
> I did not verify that):
>
> Replaced redundant PHI node defining bl_2 with c_1
> Replaced c_1 + 1 with bl_15 in all uses of c_16 = c_1 + 1;
> Removing dead stmt c_16 = c_1 + 1;
> Removing dead stmt bl_2 = PHI <0(2), bl_15(3)>
>
> Thanks,
> Richard.
>
>> Thanks.
>>
--
Regards,
Jiong