diff options
Diffstat (limited to 'gcc/loop.c')
| -rw-r--r-- | gcc/loop.c | 8 |
1 files changed, 7 insertions, 1 deletions
@@ -833,11 +833,17 @@ scan_loop (loop, flags) That behavior is incorrect and was removed. */ insert_temp = 1; + /* Don't try to optimize a MODE_CC set with a constant + source. It probably will be combined with a conditional + jump. */ + if (GET_MODE_CLASS (GET_MODE (SET_DEST (set))) == MODE_CC + && CONSTANT_P (src)) + ; /* Don't try to optimize a register that was made by loop-optimization for an inner loop. We don't know its life-span, so we can't compute the benefit. */ - if (REGNO (SET_DEST (set)) >= max_reg_before_loop) + else if (REGNO (SET_DEST (set)) >= max_reg_before_loop) ; /* Don't move the source and add a reg-to-reg copy: - with -Os (this certainly increases size), |