[SH] Remove old mov peepholes

[SH] Remove old mov peepholes

[Oleg Endo]

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Hello,

The attached patch removes old peephole patterns that seem to be unused.
Tested with 'make all'.  CSiBE result-size (-m4-single -ml -O2
-mpretend-cmove) does not show any changes.

OK?

Cheers,
Oleg


ChangeLog:

	* config/sh/sh.md: Delete mov related define_peephole patterns.

[-- Attachment #2: sh_remove_old_mov_peepholes.patch --]
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Index: gcc/config/sh/sh.md
===================================================================
--- gcc/config/sh/sh.md	(revision 186311)
+++ gcc/config/sh/sh.md	(working copy)
@@ -11726,73 +11726,9 @@
 	(mem:HI (plus:SI (match_dup 1) (match_dup 2))))]
   "")
 
-;; These convert sequences such as `mov #k,r0; add r15,r0; mov.l @r0,rn'
-;; to `mov #k,r0; mov.l @(r0,r15),rn'.  These sequences are generated by
-;; reload when the constant is too large for a reg+offset address.
-
-;; ??? We would get much better code if this was done in reload.  This would
-;; require modifying find_reloads_address to recognize that if the constant
-;; is out-of-range for an immediate add, then we get better code by reloading
-;; the constant into a register than by reloading the sum into a register,
-;; since the former is one instruction shorter if the address does not need
-;; to be offsettable.  Unfortunately this does not work, because there is
-;; only one register, r0, that can be used as an index register.  This register
-;; is also the function return value register.  So, if we try to force reload
-;; to use double-reg addresses, then we end up with some instructions that
-;; need to use r0 twice.  The only way to fix this is to change the calling
-;; convention so that r0 is not used to return values.
-
 (define_peephole
   [(set (match_operand:SI 0 "register_operand" "=r")
 	(plus:SI (match_dup 0) (match_operand:SI 1 "register_operand" "r")))
-   (set (mem:SI (match_dup 0))
-	(match_operand:SI 2 "general_movsrc_operand" ""))]
-  "TARGET_SH1 && REGNO (operands[0]) == 0 && reg_unused_after (operands[0], insn)"
-  "mov.l	%2,@(%0,%1)")
-
-(define_peephole
-  [(set (match_operand:SI 0 "register_operand" "=r")
-	(plus:SI (match_dup 0) (match_operand:SI 1 "register_operand" "r")))
-   (set (match_operand:SI 2 "general_movdst_operand" "")
-	(mem:SI (match_dup 0)))]
-  "TARGET_SH1 && REGNO (operands[0]) == 0 && reg_unused_after (operands[0], insn)"
-  "mov.l	@(%0,%1),%2")
-
-(define_peephole
-  [(set (match_operand:SI 0 "register_operand" "=r")
-	(plus:SI (match_dup 0) (match_operand:SI 1 "register_operand" "r")))
-   (set (mem:HI (match_dup 0))
-	(match_operand:HI 2 "general_movsrc_operand" ""))]
-  "TARGET_SH1 && REGNO (operands[0]) == 0 && reg_unused_after (operands[0], insn)"
-  "mov.w	%2,@(%0,%1)")
-
-(define_peephole
-  [(set (match_operand:SI 0 "register_operand" "=r")
-	(plus:SI (match_dup 0) (match_operand:SI 1 "register_operand" "r")))
-   (set (match_operand:HI 2 "general_movdst_operand" "")
-	(mem:HI (match_dup 0)))]
-  "TARGET_SH1 && REGNO (operands[0]) == 0 && reg_unused_after (operands[0], insn)"
-  "mov.w	@(%0,%1),%2")
-
-(define_peephole
-  [(set (match_operand:SI 0 "register_operand" "=r")
-	(plus:SI (match_dup 0) (match_operand:SI 1 "register_operand" "r")))
-   (set (mem:QI (match_dup 0))
-	(match_operand:QI 2 "general_movsrc_operand" ""))]
-  "TARGET_SH1 && REGNO (operands[0]) == 0 && reg_unused_after (operands[0], insn)"
-  "mov.b	%2,@(%0,%1)")
-
-(define_peephole
-  [(set (match_operand:SI 0 "register_operand" "=r")
-	(plus:SI (match_dup 0) (match_operand:SI 1 "register_operand" "r")))
-   (set (match_operand:QI 2 "general_movdst_operand" "")
-	(mem:QI (match_dup 0)))]
-  "TARGET_SH1 && REGNO (operands[0]) == 0 && reg_unused_after (operands[0], insn)"
-  "mov.b	@(%0,%1),%2")
-
-(define_peephole
-  [(set (match_operand:SI 0 "register_operand" "=r")
-	(plus:SI (match_dup 0) (match_operand:SI 1 "register_operand" "r")))
    (set (mem:SF (match_dup 0))
 	(match_operand:SF 2 "general_movsrc_operand" ""))]
   "TARGET_SH1 && REGNO (operands[0]) == 0

Re: [SH] Remove old mov peepholes

[Kaz Kojima]

Oleg Endo <oleg.endo@t-online.de> wrote:
> The attached patch removes old peephole patterns that seem to be unused.
> Tested with 'make all'.  CSiBE result-size (-m4-single -ml -O2
> -mpretend-cmove) does not show any changes.
> 
> OK?

OK.

Regards,
	kaz