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re PR rtl-optimization/8178 (__builtin_ffs broken with -march=k6) 

PR optimization/8178
	* config/i386/i386.md (*movsi_zero): Delete.
	(*ffs_no_cmove): Use ix86_expand_clear to zero the third operand.

Co-Authored-By: Richard Henderson <rth@redhat.com>

From-SVN: r72680
This commit is contained in:
Eric Botcazou 2003-10-19 19:53:11 +02:00 committed by Eric Botcazou
parent 8f4c7b679c
commit 707e58b1a7
2 changed files with 9 additions and 12 deletions
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7
gcc/ChangeLog
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@ -1,3 +1,10 @@
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.
2003-10-19 Richard Henderson <rth@redhat.com>
* config/alpha/alpha.c (fix_operator): New.

14
gcc/config/i386/i386.md
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@ -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"