[Bug target/78095] New: [7 Regression] valgrind build error on ppc64le

[trippels at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78095

            Bug ID: 78095
           Summary: [7 Regression] valgrind build error on ppc64le
           Product: gcc
           Version: 7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: trippels at gcc dot gnu.org
                CC: dje at gcc dot gnu.org, segher at gcc dot gnu.org,
                    wschmidt at gcc dot gnu.org
  Target Milestone: ---
              Host: powerpc64le-unknown-linux-gnu
            Target: powerpc64le-unknown-linux-gnu
             Build: powerpc64le-unknown-linux-gnu

I cannot build valgrind on ppc64le with trunk:

trippels@gcc2-power8 coregrind % cat vg_preloaded.i
void fn1() {
  __asm__("" : : : "r2");
}

trippels@gcc2-power8 coregrind % ~/gcc_5/usr/local/bin/gcc -c vg_preloaded.i
trippels@gcc2-power8 coregrind % ~/gcc_6/usr/local/bin/gcc -c vg_preloaded.i
trippels@gcc2-power8 coregrind % ~/gcc_7/usr/local/bin/gcc -c vg_preloaded.i
vg_preloaded.i: In function ‘fn1’:
vg_preloaded.i:2:3: error: PIC register clobbered by ‘r2’ in ‘asm’
   __asm__("" : : : "r2");
   ^~~~~~~