https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91498
Dmitry G. Dyachenko <dimhen at gmail dot com> changed:
What |Removed |Added
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CC| |dimhen at gmail dot com
--- Comment #12 from Dmitry G. Dyachenko <dimhen at gmail dot com> ---
(In reply to Arseny Solokha from comment #9)
> (In reply to H.J. Lu from comment #7)
> > Our SPEC CPU 2017 failed with
> >
> > 39 util.c:205:1: error: invalid rtl sharing found in the insn
> > 40 205 | }
> > 41 | ^
> > 42 (insn 29 28 3 2 (set (subreg:V2DI (reg:DI 91) 0)
> > 43 (vec_concat:V2DI (mem/c:DI (plus:DI (reg/f:DI 19 frame)
> > 44 (const_int -8 [0xfffffffffffffff8])) [0 S8 A64])
> > 45 (const_int 0 [0]))) "util.c":134:1 -1
> > 46 (nil))
> > 47 util.c:205:1: error: shared rtx
> > 48 (mem/c:DI (plus:DI (reg/f:DI 19 frame)
> > 49 (const_int -8 [0xfffffffffffffff8])) [0 S8 A64])
> > 50 during RTL pass: stv
> >
> > We have an invalid shared rtx.
>
> And the testcase is as simple as:
>
> int
> ff (int jn)
> {
> return jn > 0 ? jn : 0;
> }
>
> % x86_64-unknown-linux-gnu-gcc-10.0.0-alpha20190818 -march=nano-3000 -Os -c
> f9272pqv.c
> f9272pqv.c: In function 'ff':
> f9272pqv.c:5:1: error: invalid rtl sharing found in the insn
> 5 | }
> | ^
> (insn 18 17 3 2 (set (subreg:V4SI (reg:SI 87) 0)
> (vec_merge:V4SI (vec_duplicate:V4SI (mem/c:SI (plus:DI (reg/f:DI 19
> frame)
> (const_int -4 [0xfffffffffffffffc])) [0 S4 A32]))
> (const_vector:V4SI [
> (const_int 0 [0]) repeated x4
> ])
> (const_int 1 [0x1]))) "f9272pqv.c":3:1 -1
> (nil))
> f9272pqv.c:5:1: error: shared rtx
> (mem/c:SI (plus:DI (reg/f:DI 19 frame)
> (const_int -4 [0xfffffffffffffffc])) [0 S4 A32])
> during RTL pass: stv
> f9272pqv.c:5:1: internal compiler error: internal consistency failure
> 0x9f3eca verify_rtx_sharing
>
> /var/tmp/portage/sys-devel/gcc-10.0.0_alpha20190818/work/gcc-10-20190818/
> gcc/emit-rtl.c:2927
> 0x9f3dba verify_rtx_sharing
>
> /var/tmp/portage/sys-devel/gcc-10.0.0_alpha20190818/work/gcc-10-20190818/
> gcc/emit-rtl.c:2942
> 0x9f3dba verify_rtx_sharing
>
> /var/tmp/portage/sys-devel/gcc-10.0.0_alpha20190818/work/gcc-10-20190818/
> gcc/emit-rtl.c:2942
> 0x9f3dba verify_rtx_sharing
>
> /var/tmp/portage/sys-devel/gcc-10.0.0_alpha20190818/work/gcc-10-20190818/
> gcc/emit-rtl.c:2942
> 0x9f4178 verify_insn_sharing
>
> /var/tmp/portage/sys-devel/gcc-10.0.0_alpha20190818/work/gcc-10-20190818/
> gcc/emit-rtl.c:3013
> 0x9f79ed verify_rtl_sharing()
>
> /var/tmp/portage/sys-devel/gcc-10.0.0_alpha20190818/work/gcc-10-20190818/
> gcc/emit-rtl.c:3036
> 0xc7a8f3 execute_function_todo
>
> /var/tmp/portage/sys-devel/gcc-10.0.0_alpha20190818/work/gcc-10-20190818/
> gcc/passes.c:2004
> 0xc7b536 execute_todo
>
> /var/tmp/portage/sys-devel/gcc-10.0.0_alpha20190818/work/gcc-10-20190818/
> gcc/passes.c:2037
sounds like PR91503
