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Diffstat (limited to 'gcc/var-tracking.c')
| -rw-r--r-- | gcc/var-tracking.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/gcc/var-tracking.c b/gcc/var-tracking.c index 9676612..76cd7f8 100644 --- a/gcc/var-tracking.c +++ b/gcc/var-tracking.c @@ -3694,6 +3694,11 @@ dataflow_set_equiv_regs (dataflow_set *set) { rtx canon[NUM_MACHINE_MODES]; + /* If the list is empty or one entry, no need to canonicalize + anything. */ + if (set->regs[i] == NULL || set->regs[i]->next == NULL) + continue; + memset (canon, 0, sizeof (canon)); for (list = set->regs[i]; list; list = list->next) |