diff options
| -rw-r--r-- | gcc/config/aarch64/aarch64.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/gcc/config/aarch64/aarch64.c b/gcc/config/aarch64/aarch64.c index 7758316df48..6020259dea7 100644 --- a/gcc/config/aarch64/aarch64.c +++ b/gcc/config/aarch64/aarch64.c @@ -6099,6 +6099,22 @@ aarch64_rtx_costs (rtx x, int code, int outer ATTRIBUTE_UNUSED, goto cost_minus; } + if (GET_CODE (op0) == ZERO_EXTRACT && op1 == const0_rtx + && GET_MODE (x) == CC_NZmode && CONST_INT_P (XEXP (op0, 1)) + && CONST_INT_P (XEXP (op0, 2))) + { + /* COMPARE of ZERO_EXTRACT form of TST-immediate. + Handle it here directly rather than going to cost_logic + since we know the immediate generated for the TST is valid + so we can avoid creating an intermediate rtx for it only + for costing purposes. */ + if (speed) + *cost += extra_cost->alu.logical; + + *cost += rtx_cost (XEXP (op0, 0), ZERO_EXTRACT, 0, speed); + return true; + } + if (GET_CODE (op1) == NEG) { /* CMN. */ |