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i386: Remove unnecessary clobbers from combine splitters.

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There is no need for combine splitters to emit insn patterns with clobbers,
the pass is smart enough to add clobbers to patterns  as necessary.

2020-12-30  Uroš Bizjak  <ubizjak@gmail.com>

gcc/
	* config/i386/i386.md: Remove unnecessary clobbers
	from combine splitters.
This commit is contained in:
Uros Bizjak 2020-12-30 17:41:21 +01:00
parent 209da90b40
commit 0696141107
1 changed files with 24 additions and 37 deletions
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61
gcc/config/i386/i386.md
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@ -12693,12 +12693,10 @@
[(not:SWI (match_operand:SWI 2 "register_operand"))
(match_operand:SWI 3 "nonimmediate_operand")]))]
""
[(parallel
[(set (reg:CCC FLAGS_REG)
(compare:CCC
(plus:SWI (match_dup 2) (match_dup 3))
(match_dup 2)))
(clobber (scratch:SWI))])
[(set (reg:CCC FLAGS_REG)
(compare:CCC
(plus:SWI (match_dup 2) (match_dup 3))
(match_dup 2)))
(set (match_dup 0)
(match_op_dup 1 [(reg:CCC FLAGS_REG) (const_int 0)]))])
@ -12709,12 +12707,10 @@
(match_operand 3 "const_int_operand")]))]
"TARGET_64BIT
&& IN_RANGE (exact_log2 (UINTVAL (operands[3]) + 1), 32, 63)"
[(parallel
[(set (reg:CCZ FLAGS_REG)
(compare:CCZ
(lshiftrt:DI (match_dup 2) (match_dup 4))
(const_int 0)))
(clobber (scratch:DI))])
[(set (reg:CCZ FLAGS_REG)
(compare:CCZ
(lshiftrt:DI (match_dup 2) (match_dup 4))
(const_int 0)))
(set (match_dup 0)
(match_op_dup 1 [(reg:CCZ FLAGS_REG) (const_int 0)]))]
{
@ -12905,12 +12901,10 @@
(label_ref (match_operand 0))
(pc)))]
""
[(parallel
[(set (reg:CCC FLAGS_REG)
(compare:CCC
(plus:SWI (match_dup 2) (match_dup 3))
(match_dup 2)))
(clobber (scratch:SWI))])
[(set (reg:CCC FLAGS_REG)
(compare:CCC
(plus:SWI (match_dup 2) (match_dup 3))
(match_dup 2)))
(set (pc)
(if_then_else (match_op_dup 1 [(reg:CCC FLAGS_REG) (const_int 0)])
(label_ref (match_operand 0))
@ -12926,12 +12920,10 @@
(pc)))]
"TARGET_64BIT
&& IN_RANGE (exact_log2 (UINTVAL (operands[3]) + 1), 32, 63)"
[(parallel
[(set (reg:CCZ FLAGS_REG)
(compare:CCZ
(lshiftrt:DI (match_dup 2) (match_dup 4))
(const_int 0)))
(clobber (scratch:DI))])
[(set (reg:CCZ FLAGS_REG)
(compare:CCZ
(lshiftrt:DI (match_dup 2) (match_dup 4))
(const_int 0)))
(set (pc)
(if_then_else (match_op_dup 1 [(reg:CCZ FLAGS_REG) (const_int 0)])
(label_ref (match_operand 0))
@ -18581,9 +18573,8 @@
&& INTVAL (operands[2]) != -1
&& INTVAL (operands[2]) != 2147483647"
[(set (reg:CC FLAGS_REG) (compare:CC (match_dup 1) (match_dup 2)))
(parallel [(set (match_dup 0)
(neg:SWI48 (ltu:SWI48 (reg:CC FLAGS_REG) (const_int 0))))
(clobber (reg:CC FLAGS_REG))])]
(set (match_dup 0)
(neg:SWI48 (ltu:SWI48 (reg:CC FLAGS_REG) (const_int 0))))]
"operands[2] = GEN_INT (INTVAL (operands[2]) + 1);")
(define_split
@ -18594,9 +18585,8 @@
(const_int 0))))]
""
[(set (reg:CC FLAGS_REG) (compare:CC (match_dup 1) (const_int 1)))
(parallel [(set (match_dup 0)
(neg:SWI (ltu:SWI (reg:CC FLAGS_REG) (const_int 0))))
(clobber (reg:CC FLAGS_REG))])])
(set (match_dup 0)
(neg:SWI (ltu:SWI (reg:CC FLAGS_REG) (const_int 0))))])
(define_split
[(set (match_operand:SWI 0 "register_operand")
@ -18605,13 +18595,10 @@
(match_operand 1 "int_nonimmediate_operand")
(const_int 0))))]
""
[(parallel [(set (reg:CCC FLAGS_REG)
(ne:CCC (match_dup 1) (const_int 0)))
(clobber (match_dup 2))])
(parallel [(set (match_dup 0)
(neg:SWI (ltu:SWI (reg:CCC FLAGS_REG) (const_int 0))))
(clobber (reg:CC FLAGS_REG))])]
"operands[2] = gen_rtx_SCRATCH (GET_MODE (operands[1]));")
[(set (reg:CCC FLAGS_REG)
(ne:CCC (match_dup 1) (const_int 0)))
(set (match_dup 0)
(neg:SWI (ltu:SWI (reg:CCC FLAGS_REG) (const_int 0))))])
(define_insn "*mov<mode>cc_noc"
[(set (match_operand:SWI248 0 "register_operand" "=r,r")