Again, the variables are "privatized" using ASM_PN_FORMAT for MMIX (but
apparently not for other targets) and the line to match looks like:
D.1427 = VEC_PERM_EXPR <a::0, b::1, { 0, 4, 1, 5 }>;
gcc/testsuite:
* gcc.dg/tree-ssa/vector-4.c: Adjust for mmix.
--- gcc/gcc/testsuite/gcc.dg/tree-ssa/vector-4.c.orig Mon Jan 13 22:30:47 2020
+++ gcc/gcc/testsuite/gcc.dg/tree-ssa/vector-4.c Mon Jul 27 03:31:36 2020
@@ -11,5 +11,6 @@ v4si vs (v4si a, v4si b)
/* The compound literal should be placed directly in the vec_perm. */
/* Test is xfailed on 32-bit hppa*-*-* because target-callee-copies. */
-/* { dg-final { scan-tree-dump-times "VEC_PERM_EXPR <a, b, { 0, 4, 1, 5 }>;" 1
"gimple" { xfail { hppa*-*-* && { ! lp64 } } } } } */
+/* { dg-final { scan-tree-dump-times "VEC_PERM_EXPR <a, b, { 0, 4, 1, 5 }>;" 1
"gimple" { target { ! mmix-knuth-mmixware } xfail { hppa*-*-* && { ! lp64 } } }
} } */
+/* { dg-final { scan-tree-dump-times "VEC_PERM_EXPR <a::., b::., { 0, 4, 1, 5
}>;" 1 "gimple" { target mmix-knuth-mmixware } } } */
