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i386: Combine splitters followup [PR96226]

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Here is the patch to simplify the newly added combine splitters,
when we split into 2 insns anyway, no reason to split into the masking
define_insn_and_split we'd be splitting shortly after.

2020-12-05  Jakub Jelinek  <jakub@redhat.com>

	PR target/96226
	* config/i386/i386.md (splitter after *<rotate_insn><mode>3_mask,
	splitter after *<rotate_insn><mode>3_mask_1): Drop the masking from
	the patterns to split into.
This commit is contained in:
Jakub Jelinek 2020-12-05 01:31:08 +01:00
parent 43e84ce7d6
commit 625e002396
1 changed files with 2 additions and 4 deletions
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6
gcc/config/i386/i386.md
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@ -11988,8 +11988,7 @@
[(set (match_dup 4) (match_dup 1))
(set (match_dup 0)
(any_rotate:SWI48 (match_dup 4)
(subreg:QI
(and:SI (match_dup 2) (match_dup 3)) 0)))]
(subreg:QI (match_dup 2) 0)))]
"operands[4] = gen_reg_rtx (<MODE>mode);")
(define_insn_and_split "*<rotate_insn><mode>3_mask_1"
@ -12023,8 +12022,7 @@
== GET_MODE_BITSIZE (<MODE>mode) - 1"
[(set (match_dup 4) (match_dup 1))
(set (match_dup 0)
(any_rotate:SWI48 (match_dup 4)
(and:QI (match_dup 2) (match_dup 3))))]
(any_rotate:SWI48 (match_dup 4) (match_dup 2)))]
"operands[4] = gen_reg_rtx (<MODE>mode);")
;; Implement rotation using two double-precision