diff options
Diffstat (limited to 'gcc/compare-elim.c')
| -rw-r--r-- | gcc/compare-elim.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/gcc/compare-elim.c b/gcc/compare-elim.c index 16576c44473..50bbaa84b6d 100644 --- a/gcc/compare-elim.c +++ b/gcc/compare-elim.c @@ -690,6 +690,13 @@ try_merge_compare (struct comparison *cmp) return false; rtx src = SET_SRC (set); + + /* If the source uses addressing modes with side effects, we can't + do the merge because we'd end up with a PARALLEL that has two + instances of that side effect in it. */ + if (side_effects_p (src)) + return false; + rtx flags = maybe_select_cc_mode (cmp, src, CONST0_RTX (GET_MODE (src))); if (!flags) { @@ -809,6 +816,12 @@ try_eliminate_compare (struct comparison *cmp) else return false; + /* If the source uses addressing modes with side effects, we can't + do the merge because we'd end up with a PARALLEL that has two + instances of that side effect in it. */ + if (side_effects_p (cmp_src)) + return false; + /* Determine if we ought to use a different CC_MODE here. */ flags = maybe_select_cc_mode (cmp, cmp_src, in_b); if (flags == NULL) |