Re: [committed] patch to deal with insn scratches in global RA

[Christophe Lyon <christophe.lyon@linaro.org>]

On Mon, 2 Nov 2020 at 23:01, Vladimir Makarov <vmakarov@redhat.com> wrote:
>
>
> On 2020-11-02 4:30 p.m., Vladimir Makarov via Gcc-patches wrote:
> >
> > On 2020-11-02 3:12 p.m., Christophe Lyon wrote:
> >>
> >> Hi,
> >>
> >> This patch causes ICEs on arm (eg arm-none-linux-gnueabi)
> >>      gcc.c-torture/compile/sync-3.c   -O1  (internal compiler error)
> >>      gcc.c-torture/compile/sync-3.c   -O2  (internal compiler error)
> >>      gcc.c-torture/compile/sync-3.c   -O2 -flto -fno-use-linker-plugin
> >> -flto-partition=none  (internal compiler error)
> >>      gcc.c-torture/compile/sync-3.c   -O2 -flto -fuse-linker-plugin
> >> -fno-fat-lto-objects  (internal compiler error)
> >>      gcc.c-torture/compile/sync-3.c   -O3 -g  (internal compiler error)
> >>      gcc.c-torture/compile/sync-3.c   -Os  (internal compiler error)
> >>
> >> gcc.log says:
> >> FAIL: gcc.c-torture/compile/sync-3.c   -O1  (internal compiler error)
> >> PASS: gcc.c-torture/compile/sync-3.c   -O1   (test for warnings, line )
> >> FAIL: gcc.c-torture/compile/sync-3.c   -O1  (test for excess errors)
> >> Excess errors:
> >> during RTL pass: ira
> >> /gcc/testsuite/gcc.c-torture/compile/sync-3.c:85:1: internal compiler
> >> error: Segmentation fault
> >> 0xcf8b1f crash_signal
> >>          /gcc/toplev.c:330
> >> 0xaeb0a0 fix_reg_equiv_init
> >>          /gcc/ira.c:2671
> >> 0xaf2113 find_moveable_pseudos
> >>          /gcc/ira.c:4874
> >> 0xaf48e8 ira
> >>          /gcc/ira.c:5533
> >> 0xaf48e8 execute
> >>          /gcc/ira.c:5861
> >
> >
> > Thank you for sending this info.  I reproduced the crash with
> > x86-64-arm cross-compiler although it is absent on native arm
> > environment.  I will have a fix tomorrow.
> >
> >
> I've fixed it.
>
Thanks, I confirm I no longer see this error.

Christophe