Apparently local labels end up in the gimple dumps. For mmix, local labels that for other targets look like ".LC0" or "LC.0" instead look like "LC:0". Committed as obvious.
gcc/testsuite: * gcc.dg/const-uniq-1.c: Adjust scanned pattern for mmix. --- gcc/gcc/testsuite/gcc.dg/const-uniq-1.c.orig Mon Jan 13 22:30:47 2020 +++ gcc/gcc/testsuite/gcc.dg/const-uniq-1.c Mon Jul 20 04:47:35 2020 @@ -20,4 +20,4 @@ int lookup2 (int i) return a[i+1]; } -/* { dg-final { scan-tree-dump-times "\[lL\]\\\$?C\\\.*0" 2 "gimple" } } */ +/* { dg-final { scan-tree-dump-times "\[lL\]\\\$?C\[.:\]*0" 2 "gimple" } } */