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(addsi): New add to lea splitter. 

* (addsi): New add to lea splitter.
	(ashlsi): Likewise.
	(lea to add/shift peep2): New.

From-SVN: r30745
This commit is contained in:
Jan Hubicka 1999-12-01 23:35:15 +01:00 committed by Jan Hubicka
parent c45fd7f9b2
commit 1c27d4b20f
2 changed files with 53 additions and 1 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
Fri Nov 26 10:59:12 CET 1999 Jan Hubicka <hubicka@freesoft.cz>
* (addsi): New add to lea splitter.
(ashlsi): Likewise.
(lea to add/shift peep2): New.
1999-12-01 Mark Salter <msalter@cygnus.com>
* config/mips/elf.h (STARTFILE_SPEC): Add no-crt0.

48
gcc/config/i386/i386.md
View File

@ -2107,7 +2107,7 @@
(define_insn "*zero_extendqihi2_movzbw"
[(set (match_operand:HI 0 "register_operand" "=r")
(zero_extend:HI (match_operand:QI 1 "nonimmediate_operand" "qm")))]
"!TARGET_ZERO_EXTEND_WITH_AND || optimize_size"
"(!TARGET_ZERO_EXTEND_WITH_AND || optimize_size) && reload_completed"
"movz{bw|x}\\t{%1, %0|%0, %1}"
[(set_attr "type" "imovx")])
@ -3096,6 +3096,19 @@
]
(const_string "alu")))])
;; Convert lea to the lea pattern to avoid flags dependency.
(define_split
[(set (match_operand:SI 0 "register_operand" "")
(plus:SI (match_operand:SI 1 "register_operand" "")
(match_operand:SI 2 "nonmemory_operand" "")))
(clobber (reg:CC 17))]
"reload_completed
&& true_regnum (operands[0]) != true_regnum (operands[1])"
[(set (match_dup 0)
(plus:SI (match_dup 1)
(match_dup 2)))]
"")
(define_insn "*addsi_2"
[(set (reg:CCNO 17)
(compare:CCNO
@ -5501,6 +5514,19 @@
]
(const_string "ishift")))])
;; Convert lea to the lea pattern to avoid flags dependency.
(define_split
[(set (match_operand:SI 0 "register_operand" "")
(ashift:SI (match_operand:SI 1 "register_operand" "")
(match_operand:QI 2 "immediate_operand" "")))
(clobber (reg:CC 17))]
"reload_completed
&& true_regnum (operands[0]) != true_regnum (operands[1])"
[(set (match_dup 0)
(mult:SI (match_dup 1)
(match_dup 2)))]
"operands[2] = GEN_INT (1 << INTVAL (operands[2]));")
(define_insn "*ashlsi3_cmpno"
[(set (reg:CCNO 17)
(compare:CCNO
@ -8494,6 +8520,26 @@
[(parallel [(set (match_dup 0) (const_int -1))
(clobber (reg:CC 17))])]
"operands[0] = gen_rtx_REG (SImode, true_regnum (operands[0]));")
;; Attempt to convert simple leas to adds. These can be created by
;; move expanders.
(define_peephole2
[(set (match_operand:SI 0 "register_operand" "")
(plus:SI (match_dup 0)
(match_operand:SI 1 "nonmemory_operand" "")))]
"reg_dead_p (insn, gen_rtx_REG (CCmode, FLAGS_REG))"
[(parallel [(set (match_dup 0) (plus:SI (match_dup 0) (match_dup 1)))
(clobber (reg:CC 17))])]
"")
(define_peephole2
[(set (match_operand:SI 0 "register_operand" "")
(mult:SI (match_dup 0)
(match_operand:SI 1 "immediate_operand" "")))]
"reg_dead_p (insn, gen_rtx_REG (CCmode, FLAGS_REG))"
[(parallel [(set (match_dup 0) (ashift:SI (match_dup 0) (match_dup 2)))
(clobber (reg:CC 17))])]
"operands[2] = GEN_INT (exact_log2 (INTVAL (operands[1])));")
;; Call-value patterns last so that the wildcard operand does not
;; disrupt insn-recog's switch tables.