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| author | Yvan Roux <yvan.roux@linaro.org> | 2017-06-07 15:36:02 +0200 |
|---|---|---|
| committer | Yvan Roux <yvan.roux@linaro.org> | 2017-06-13 08:02:55 +0000 |
| commit | cae2dc7f64aeeb7861ce2d6242475f288d88fb4b (patch) | |
| tree | e5679fe9064635a5c6b9183876f8f5641206d98d /gcc/expr.c | |
| parent | d043ff2ac6f8c3ce0a0f0c652f0eedc767f04d7a (diff) | |
gcc/
Backport from trunk r247505.
2017-04-26 Tamar Christina <tamar.christina@arm.com>
* expr.c (expand_expr_real_2): Re-cost if previous costs are the same.
Change-Id: If81c130ecd1ba4978d44c4da6778cb6bfe756bbd
Diffstat (limited to 'gcc/expr.c')
| -rw-r--r-- | gcc/expr.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/gcc/expr.c b/gcc/expr.c index c5c50e015ad..4749cc508b8 100644 --- a/gcc/expr.c +++ b/gcc/expr.c @@ -8838,6 +8838,15 @@ expand_expr_real_2 (sepops ops, rtx target, machine_mode tmode, end_sequence (); unsigned uns_cost = seq_cost (uns_insns, speed_p); unsigned sgn_cost = seq_cost (sgn_insns, speed_p); + + /* If costs are the same then use as tie breaker the other + other factor. */ + if (uns_cost == sgn_cost) + { + uns_cost = seq_cost (uns_insns, !speed_p); + sgn_cost = seq_cost (sgn_insns, !speed_p); + } + if (uns_cost < sgn_cost || (uns_cost == sgn_cost && unsignedp)) { emit_insn (uns_insns); |