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* [Bug target/39724] New: [cond-optab] reload_cse_simplify_operands complicates code on vax
@ 2009-04-10 12:58 bonzini at gnu dot org
2009-05-12 12:07 ` [Bug target/39724] [4.5 Regression][cond-optab] " bonzini at gnu dot org
2009-07-14 21:34 ` bonzini at gnu dot org
0 siblings, 2 replies; 3+ messages in thread
From: bonzini at gnu dot org @ 2009-04-10 12:58 UTC (permalink / raw)
To: gcc-bugs
reload_cse_simplify_operandss likes to change (compare REG (const_int 0)) to a
compare between registers on VAX, when it has a register at hand whose value is
zero. This pessimizes code and in some cases even introduces spurious compares
instead of using CC0.
/* -Os */
f(int count,double r,double *rho)
{
int i, j, miny, maxy, hy;
float help, d;
for (hy = miny; hy<= maxy; hy++)
while(j >=0)
if ( d <= r) abort ();
}
--
Summary: [cond-optab] reload_cse_simplify_operands complicates
code on vax
Product: gcc
Version: 4.5.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: bonzini at gnu dot org
OtherBugsDependingO 39714
nThis:
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39724
^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug target/39724] [4.5 Regression][cond-optab] reload_cse_simplify_operands complicates code on vax
2009-04-10 12:58 [Bug target/39724] New: [cond-optab] reload_cse_simplify_operands complicates code on vax bonzini at gnu dot org
@ 2009-05-12 12:07 ` bonzini at gnu dot org
2009-07-14 21:34 ` bonzini at gnu dot org
1 sibling, 0 replies; 3+ messages in thread
From: bonzini at gnu dot org @ 2009-05-12 12:07 UTC (permalink / raw)
To: gcc-bugs
--
bonzini at gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P4
Summary|[cond-optab] |[4.5 Regression][cond-optab]
|reload_cse_simplify_operands|reload_cse_simplify_operands
|complicates code on vax |complicates code on vax
Target Milestone|--- |4.5.0
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39724
^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug target/39724] [4.5 Regression][cond-optab] reload_cse_simplify_operands complicates code on vax
2009-04-10 12:58 [Bug target/39724] New: [cond-optab] reload_cse_simplify_operands complicates code on vax bonzini at gnu dot org
2009-05-12 12:07 ` [Bug target/39724] [4.5 Regression][cond-optab] " bonzini at gnu dot org
@ 2009-07-14 21:34 ` bonzini at gnu dot org
1 sibling, 0 replies; 3+ messages in thread
From: bonzini at gnu dot org @ 2009-07-14 21:34 UTC (permalink / raw)
To: gcc-bugs
------- Comment #1 from bonzini at gnu dot org 2009-07-14 21:34 -------
I cannot reproduce this anymore.
--
bonzini at gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution| |WORKSFORME
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39724
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2009-07-14 21:34 UTC | newest]
Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed)
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2009-04-10 12:58 [Bug target/39724] New: [cond-optab] reload_cse_simplify_operands complicates code on vax bonzini at gnu dot org
2009-05-12 12:07 ` [Bug target/39724] [4.5 Regression][cond-optab] " bonzini at gnu dot org
2009-07-14 21:34 ` bonzini at gnu dot org
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