diff options
| author | Yvan Roux <yvan.roux@linaro.org> | 2017-08-16 11:08:16 +0200 |
|---|---|---|
| committer | Yvan Roux <yvan.roux@linaro.org> | 2017-08-17 06:41:00 +0000 |
| commit | d16cc92b9de59611269a89dc9f18161313b1238c (patch) | |
| tree | 14783c0a0a95a3062bb20948fd7f633e4d3edd91 | |
| parent | 7034e0b5f2d41be79c29fab75a60937b282d9a70 (diff) | |
gcc/
Backport from trunk r249740.
2017-06-28 Wilco Dijkstra <wdijkstr@arm.com>
PR target/79665
* config/arm/aarch-common.c (arm_no_early_alu_shift_dep):
Remove redundant if.
(aarch_forward_to_shift_is_not_shifted_reg): Remove.
* config/arm/aarch-common-protos.h
(aarch_forward_to_shift_is_not_shifted_re): Remove.
* config/arm/cortex-a53.md: Use arm_no_early_alu_shift_dep in bypass.
Change-Id: Icc60b1c713e894a01793c69f72b352295091fac0
| -rw-r--r-- | gcc/config/arm/aarch-common-protos.h | 1 | ||||
| -rw-r--r-- | gcc/config/arm/aarch-common.c | 39 | ||||
| -rw-r--r-- | gcc/config/arm/cortex-a53.md | 2 |
3 files changed, 2 insertions, 40 deletions
diff --git a/gcc/config/arm/aarch-common-protos.h b/gcc/config/arm/aarch-common-protos.h index 35d2d96c9fd..a51121193ce 100644 --- a/gcc/config/arm/aarch-common-protos.h +++ b/gcc/config/arm/aarch-common-protos.h @@ -25,7 +25,6 @@ extern int aarch_accumulator_forwarding (rtx_insn *, rtx_insn *); extern int aarch_crypto_can_dual_issue (rtx_insn *, rtx_insn *); -extern int aarch_forward_to_shift_is_not_shifted_reg (rtx_insn *, rtx_insn *); extern bool aarch_rev16_p (rtx); extern bool aarch_rev16_shleft_mask_imm_p (rtx, machine_mode); extern bool aarch_rev16_shright_mask_imm_p (rtx, machine_mode); diff --git a/gcc/config/arm/aarch-common.c b/gcc/config/arm/aarch-common.c index 6a04711335d..979f86e5bed 100644 --- a/gcc/config/arm/aarch-common.c +++ b/gcc/config/arm/aarch-common.c @@ -272,12 +272,7 @@ arm_no_early_alu_shift_dep (rtx producer, rtx consumer) return 0; if ((early_op = arm_find_shift_sub_rtx (op))) - { - if (REG_P (early_op)) - early_op = op; - - return !reg_overlap_mentioned_p (value, early_op); - } + return !reg_overlap_mentioned_p (value, early_op); return 0; } @@ -508,38 +503,6 @@ aarch_accumulator_forwarding (rtx_insn *producer, rtx_insn *consumer) return (REGNO (dest) == REGNO (accumulator)); } -/* Return nonzero if the CONSUMER instruction is some sort of - arithmetic or logic + shift operation, and the register we are - writing in PRODUCER is not used in a register shift by register - operation. */ - -int -aarch_forward_to_shift_is_not_shifted_reg (rtx_insn *producer, - rtx_insn *consumer) -{ - rtx value, op; - rtx early_op; - - if (!arm_get_set_operands (producer, consumer, &value, &op)) - return 0; - - if ((early_op = arm_find_shift_sub_rtx (op))) - { - if (REG_P (early_op)) - early_op = op; - - /* Any other canonicalisation of a shift is a shift-by-constant - so we don't care. */ - if (GET_CODE (early_op) == ASHIFT) - return (!REG_P (XEXP (early_op, 0)) - || !REG_P (XEXP (early_op, 1))); - else - return 1; - } - - return 0; -} - /* Return non-zero if the consumer (a multiply-accumulate instruction) has an accumulator dependency on the result of the producer (a multiplication instruction) and no other dependency on that result. */ diff --git a/gcc/config/arm/cortex-a53.md b/gcc/config/arm/cortex-a53.md index ff16e360a66..77f3136e4d1 100644 --- a/gcc/config/arm/cortex-a53.md +++ b/gcc/config/arm/cortex-a53.md @@ -211,7 +211,7 @@ (define_bypass 1 "cortex_a53_alu*" "cortex_a53_alu_shift*" - "aarch_forward_to_shift_is_not_shifted_reg") + "arm_no_early_alu_shift_dep") (define_bypass 2 "cortex_a53_alu*" "cortex_a53_alu_*,cortex_a53_shift*") |