diff options
Diffstat (limited to 'gcc/config/mn10300/mn10300.c')
| -rw-r--r-- | gcc/config/mn10300/mn10300.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/gcc/config/mn10300/mn10300.c b/gcc/config/mn10300/mn10300.c index ceb77e862c2..47fd5cbf933 100644 --- a/gcc/config/mn10300/mn10300.c +++ b/gcc/config/mn10300/mn10300.c @@ -2030,7 +2030,7 @@ mn10300_rtx_costs (rtx x, int code, int outer_code, int *total, bool speed ATTRI { case CONST_INT: /* Zeros are extremely cheap. */ - if (INTVAL (x) == 0 && outer_code == SET) + if (INTVAL (x) == 0 && (outer_code == SET || outer_code == COMPARE)) *total = 0; /* If it fits in 8 bits, then it's still relatively cheap. */ else if (INT_8_BITS (INTVAL (x))) @@ -2059,6 +2059,12 @@ mn10300_rtx_costs (rtx x, int code, int outer_code, int *total, bool speed ATTRI *total = 8; return true; + case ZERO_EXTRACT: + /* This is cheap, we can use btst. */ + if (outer_code == COMPARE) + *total = 0; + return false; + /* ??? This probably needs more work. */ case MOD: case DIV: |
