No dots in labels for MMIX: internal labels instead contain ":".
gcc/testsuite:
* c-c++-common/pr56493.c: Allow ":" in label, for mmix.
}
/* Verify we narrow the addition from unsigned long long to unsigned int type. */
-/* { dg-final { scan-tree-dump " (\[a-zA-Z._0-9$]*) = \\(unsigned int\\) \[^;\n\r]*;.* (\[a-zA-Z._0-9$]*) = \\(unsigned int\\) \[^;\n\r]*;.* = \\1 \\+ \\2;" "gimple" { target { ilp32 || lp64 } } } } */
+/* { dg-final { scan-tree-dump " (\[a-zA-Z._0-9$:]*) = \\(unsigned int\\) \[^;\n\r]*;.* (\[a-zA-Z._0-9$:]*) = \\(unsigned int\\) \[^;\n\r]*;.* = \\1 \\+ \\2;" "gimple" { target { ilp32 || lp64 } } } } */