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From: "hubicka at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/53346] [4.6/4.7/4.8 Regression] Bad vectorization in the proc cptrf2 of rnflow.f90
Date: Wed, 14 Nov 2012 22:38:00 -0000 [thread overview]
Message-ID: <bug-53346-4-pEOdp0sJoY@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-53346-4@http.gcc.gnu.org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53346
--- Comment #22 from Jan Hubicka <hubicka at gcc dot gnu.org> 2012-11-14 22:38:19 UTC ---
OK, similar loop in C looks like:
float a[10000];
float b[10000];
t()
{
int mi = 0,i;
for (i=0;i<1000;i++)
if (a[i]<b[i])
mi = i;
return mi;
}
and the why we do not ifconvert at RTl level is that the condition is UNLE that
do not pass unordered_comparsion_operator. This was noticed by Jakub in other
PR, we do not really need to test unorderedness here since expander knows how
to handle it. So this was more by chance than by design. I am testing
Index: config/i386/i386.md
===================================================================
--- config/i386/i386.md (revision 193503)
+++ config/i386/i386.md (working copy)
@@ -964,7 +964,7 @@
(compare:CC (match_operand:SDWIM 1 "nonimmediate_operand")
(match_operand:SDWIM 2 "<general_operand>")))
(set (pc) (if_then_else
- (match_operator 0 "ordered_comparison_operator"
+ (match_operator 0 "comparison_operator"
[(reg:CC FLAGS_REG) (const_int 0)])
(label_ref (match_operand 3))
(pc)))]
@@ -982,7 +982,7 @@
(compare:CC (match_operand:SWIM 2 "nonimmediate_operand")
(match_operand:SWIM 3 "<general_operand>")))
(set (match_operand:QI 0 "register_operand")
- (match_operator 1 "ordered_comparison_operator"
+ (match_operator 1 "comparison_operator"
[(reg:CC FLAGS_REG) (const_int 0)]))]
""
{
@@ -16120,7 +16120,7 @@
(define_expand "mov<mode>cc"
[(set (match_operand:SWIM 0 "register_operand")
- (if_then_else:SWIM (match_operand 1 "ordered_comparison_operator")
+ (if_then_else:SWIM (match_operand 1 "comparison_operator")
(match_operand:SWIM 2 "<general_operand>")
(match_operand:SWIM 3 "<general_operand>")))]
""
next prev parent reply other threads:[~2012-11-14 22:38 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-05-14 15:44 [Bug tree-optimization/53346] New: " dominiq at lps dot ens.fr
2012-05-15 9:54 ` [Bug tree-optimization/53346] " rguenth at gcc dot gnu.org
2012-05-15 12:55 ` dominiq at lps dot ens.fr
2012-05-17 18:35 ` ubizjak at gmail dot com
2012-05-17 20:47 ` ubizjak at gmail dot com
2012-05-18 11:49 ` rguenth at gcc dot gnu.org
2012-05-18 14:28 ` rguenth at gcc dot gnu.org
2012-05-18 14:32 ` rguenth at gcc dot gnu.org
2012-05-18 14:49 ` ubizjak at gmail dot com
2012-05-18 14:52 ` dominiq at lps dot ens.fr
2012-05-18 15:13 ` ubizjak at gmail dot com
2012-05-18 17:32 ` ubizjak at gmail dot com
2012-05-18 17:34 ` ubizjak at gmail dot com
2012-05-18 17:46 ` ubizjak at gmail dot com
2012-05-18 17:48 ` ubizjak at gmail dot com
2012-05-18 17:56 ` pinskia at gcc dot gnu.org
2012-05-18 18:27 ` hjl.tools at gmail dot com
2012-05-18 18:27 ` ubizjak at gmail dot com
2012-05-18 19:45 ` dominiq at lps dot ens.fr
2012-05-19 23:50 ` dominiq at lps dot ens.fr
2012-09-07 11:59 ` [Bug target/53346] " rguenth at gcc dot gnu.org
2012-11-14 22:19 ` hubicka at gcc dot gnu.org
2012-11-14 22:38 ` hubicka at gcc dot gnu.org [this message]
2012-12-31 9:20 ` [Bug target/53346] [4.6/4.7/4.8 Regression] Bad if conversion in " pinskia at gcc dot gnu.org
2012-12-31 9:41 ` pinskia at gcc dot gnu.org
2022-09-26 3:22 ` cvs-commit at gcc dot gnu.org
2022-09-26 3:24 ` crazylht at gmail dot com
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