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Re: [PATCH] Fix PR optimization/8178 (x86)
> The correct fix is to remove the first pattern of the split
> and invoke ix86_expand_clear from the { } .
Ah! ok, thanks. Nice little function :-)
Bootstrapped/regtested on k6-redhat-linux-gnu (mainline, except Ada).
2003-10-19 Eric Botcazou <ebotcazou@libertysurf.fr>
Richard Henderson <rth@redhat.com>
PR optimization/8178
* config/i386/i386.md (*movsi_zero): Delete.
(*ffs_no_cmove): Use ix86_expand_clear to zero
the third operand.
--
Eric BotcazouIndex: config/i386/i386.md
===================================================================
RCS file: /cvs/gcc/gcc/gcc/config/i386/i386.md,v
retrieving revision 1.485
diff -u -r1.485 i386.md
--- config/i386/i386.md 18 Oct 2003 07:24:59 -0000 1.485
+++ config/i386/i386.md 18 Oct 2003 20:19:13 -0000
@@ -1161,15 +1161,6 @@
[(set_attr "type" "alu1")
(set_attr "mode" "SI")
(set_attr "length_immediate" "0")])
-
-(define_insn "*movsi_zero"
- [(set (match_operand:SI 0 "register_operand" "=r")
- (match_operand:SI 1 "const0_operand" "i"))
- (clobber (reg:CC 17))]
- "reload_completed && (TARGET_USE_MOV0 && !optimize_size)"
- "mov{l}\t{%1, %0|%0, %1}"
- [(set_attr "type" "imov")
- (set_attr "mode" "SI")])
(define_insn "*movsi_or"
[(set (match_operand:SI 0 "register_operand" "=r")
@@ -14464,9 +14455,7 @@
""
"#"
"reload_completed"
- [(parallel [(set (match_dup 2) (const_int 0))
- (clobber (reg:CC 17))])
- (parallel [(set (reg:CCZ 17) (compare:CCZ (match_dup 1) (const_int 0)))
+ [(parallel [(set (reg:CCZ 17) (compare:CCZ (match_dup 1) (const_int 0)))
(set (match_dup 0) (ctz:SI (match_dup 1)))])
(set (strict_low_part (match_dup 3))
(eq:QI (reg:CCZ 17) (const_int 0)))
@@ -14478,6 +14467,7 @@
(clobber (reg:CC 17))])]
{
operands[3] = gen_lowpart (QImode, operands[2]);
+ ix86_expand_clear (operands[2]);
})
(define_insn "*ffssi_1"