diff options
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/ifcvt.c | 5 |
2 files changed, 10 insertions, 1 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index b4495d8..6037782 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +2016-02-11 Richard Biener <rguenther@suse.de> + + PR rtl-optimization/69291 + * ifcvt.c (noce_try_store_flag_constants): Do not allow + subexpressions affected by changing the result. + 2016-02-10 Vladimir Makarov <vmakarov@redhat.com> PR target/69148 diff --git a/gcc/ifcvt.c b/gcc/ifcvt.c index a50e33d..2055909 100644 --- a/gcc/ifcvt.c +++ b/gcc/ifcvt.c @@ -1274,7 +1274,10 @@ noce_try_store_flag_constants (struct noce_if_info *if_info) && CONST_INT_P (XEXP (a, 1)) && CONST_INT_P (XEXP (b, 1)) && rtx_equal_p (XEXP (a, 0), XEXP (b, 0)) - && noce_operand_ok (XEXP (a, 0)) + /* Allow expressions that are not using the result or plain + registers where we handle overlap below. */ + && (REG_P (XEXP (a, 0)) + || ! reg_overlap_mentioned_p (if_info->x, XEXP (a, 0))) && if_info->branch_cost >= 2) { common = XEXP (a, 0); |