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m68hc11.md (peephole2): New peephole2 to optimize address computations. 

* config/m68hc11/m68hc11.md (peephole2): New peephole2 to optimize
	address computations.

From-SVN: r47323
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Stephane Carrez 2001-11-25 17:45:22 +01:00 committed by Stephane Carrez
parent 259ed6e270
commit 4f81fba13e
2 changed files with 31 additions and 0 deletions
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gcc/ChangeLog
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@ -1,3 +1,8 @@
2001-11-25 Stephane Carrez <Stephane.Carrez@worldnet.fr>
* config/m68hc11/m68hc11.md (peephole2): New peephole2 to optimize
address computations.
2001-11-25 Stephane Carrez <Stephane.Carrez@worldnet.fr>
* config/m68hc11/m68hc11.c (d_register_operand): Must accept

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gcc/config/m68hc11/m68hc11.md
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@ -6102,6 +6102,32 @@
;;- Peepholes
;;--------------------------------------------------------------------
;;
;; Reorganize to optimize address computations.
;;
(define_peephole2
[(set (match_operand:HI 0 "hard_reg_operand" "")
(match_operand:HI 1 "const_int_operand" ""))
(set (match_dup 0)
(plus:HI (match_dup 0)
(match_operand:HI 2 "general_operand" "")))]
"(INTVAL (operands[1]) >= -2 && INTVAL (operands[1]) <= 2)"
[(set (match_dup 0) (match_dup 2))
(set (match_dup 0) (plus:HI (match_dup 0) (match_dup 1)))]
"")
;;
;; Reorganize address computation based on stack pointer.
;;
(define_peephole2
[(set (match_operand:HI 0 "hard_reg_operand" "")
(match_operand:HI 1 "const_int_operand" ""))
(set (match_dup 0) (plus:HI (match_dup 0) (reg:HI SP_REGNUM)))]
""
[(set (match_dup 0) (reg:HI SP_REGNUM))
(set (match_dup 0) (plus:HI (match_dup 0) (match_dup 1)))]
"")
;;
;; This peephole catches the address computations generated by the reload
;; pass.