Long-standing FAIL remedied; committed. Maybe better to list
the targets that *do* support arbitrary frame access?
gcc/testsuite:
* gcc.dg/Wno-frame-address.c: Skip for cris and mmix.
--- gcc/gcc/testsuite/gcc.dg/Wno-frame-address.c.orig Mon Jan 13 22:30:47 2020
+++ gcc/gcc/testsuite/gcc.dg/Wno-frame-address.c Sun Jul 19 05:05:49 2020
@@ -1,5 +1,5 @@
/* { dg-do compile } */
-/* { dg-skip-if "Cannot access arbitrary stack frames" { arm*-*-* amdgpu-*-*
avr-*-* hppa*-*-* ia64-*-* visium-*-* csky-*-* msp430-*-* } } */
+/* { dg-skip-if "Cannot access arbitrary stack frames" { arm*-*-* amdgpu-*-*
avr-*-* hppa*-*-* ia64-*-* visium-*-* csky-*-* msp430-*-* cris-*-* mmix-*-* } }
*/
/* { dg-options "-Werror" } */
/* { dg-additional-options "-mbackchain" { target { s390*-*-* } } } */
