diff options
Diffstat (limited to 'gcc/config/rs6000/rs6000.md')
| -rw-r--r-- | gcc/config/rs6000/rs6000.md | 39 |
1 files changed, 20 insertions, 19 deletions
diff --git a/gcc/config/rs6000/rs6000.md b/gcc/config/rs6000/rs6000.md index 1e73e6a..d8264ca 100644 --- a/gcc/config/rs6000/rs6000.md +++ b/gcc/config/rs6000/rs6000.md @@ -137,6 +137,7 @@ UNSPEC_UNPACK_128BIT UNSPEC_PACK_128BIT UNSPEC_LSQ + UNSPEC_FUSION_GPR ]) ;; @@ -14296,22 +14297,9 @@ ;; a GPR. The addis instruction must be adjacent to the load, and use the same ;; register that is being loaded. The fused ops must be physically adjacent. -;; We use define_peephole for the actual addis/load, and the register used to -;; hold the addis value must be the same as the register being loaded. We use -;; define_peephole2 to change the register used for addis to be the register -;; being loaded, since we can look at whether it is dead after the load insn. - -(define_peephole - [(set (match_operand:P 0 "base_reg_operand" "") - (match_operand:P 1 "fusion_gpr_addis" "")) - (set (match_operand:INT1 2 "base_reg_operand" "") - (match_operand:INT1 3 "fusion_gpr_mem_load" ""))] - "TARGET_P8_FUSION && fusion_gpr_load_p (operands, false)" -{ - return emit_fusion_gpr_load (operands); -} - [(set_attr "type" "load") - (set_attr "length" "8")]) +;; Find cases where the addis that feeds into a load instruction is either used +;; once or is the same as the target register, and replace it with the fusion +;; insn (define_peephole2 [(set (match_operand:P 0 "base_reg_operand" "") @@ -14319,15 +14307,28 @@ (set (match_operand:INT1 2 "base_reg_operand" "") (match_operand:INT1 3 "fusion_gpr_mem_load" ""))] "TARGET_P8_FUSION - && (REGNO (operands[0]) != REGNO (operands[2]) - || GET_CODE (operands[3]) == SIGN_EXTEND) - && fusion_gpr_load_p (operands, true)" + && fusion_gpr_load_p (operands[0], operands[1], operands[2], + operands[3])" [(const_int 0)] { expand_fusion_gpr_load (operands); DONE; }) +;; Fusion insn, created by the define_peephole2 above (and eventually by +;; reload) + +(define_insn "fusion_gpr_load_<mode>" + [(set (match_operand:INT1 0 "base_reg_operand" "=&b") + (unspec:INT1 [(match_operand:INT1 1 "fusion_gpr_mem_combo" "")] + UNSPEC_FUSION_GPR))] + "TARGET_P8_FUSION" +{ + return emit_fusion_gpr_load (operands[0], operands[1]); +} + [(set_attr "type" "load") + (set_attr "length" "8")]) + ;; Miscellaneous ISA 2.06 (power7) instructions (define_insn "addg6s" |