On Wed, Nov 30, 2016 at 11:27:40PM +0100, Jakub Jelinek wrote:
> Markus said he has bootstrapped this patch with rtl checking on powerpc64.

I repeated the exercise and found a stage1 bootstrap failure due to
invalid rtl sharing on powerpc64le-linux, using

AS="/home/amodra/gnu/bin/as" LD="/home/amodra/gnu/bin/ld" \
~/src/gcc-pr78614/configure \
--build=powerpc64le-linux --prefix=/home/amodra/gnu \
--enable-targets=powerpc64-linux,powerpc-linux,powerpcle-linux 
--disable-multilib \
--enable-valgrind-annotations \
--disable-nls --with-cpu=power8 --enable-languages=all,go --enable-lto \
--enable-checking=yes,rtl

> 2016-11-30  Jakub Jelinek  <ja...@redhat.com>
> 
>       PR target/78614
>       * config/rs6000/rs6000.c (rs6000_frame_related): Call
>       set_used_flags (pat) before any simplifications.  Clear used flag on
>       PARALLEL copy.  Don't guard add_reg_note call.  Call
>       copy_rtx_if_shared on pat before storing it into
>       REG_FRAME_RELATED_EXPR.

-- 
Alan Modra
Australia Development Lab, IBM

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