--- Comment #10 from jakub at gcc dot gnu dot org 2006-05-04 06:40 ---
Subject: Bug 25985
Author: jakub
Date: Thu May 4 06:40:15 2006
New Revision: 113515
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=113515
Log:
PR tree-optimization/27285
Backport from mainli
--- Comment #9 from pinskia at gcc dot gnu dot org 2006-04-11 23:13 ---
Fixed.
--
pinskia at gcc dot gnu dot org changed:
What|Removed |Added
Status|ASSIGNED
--- Comment #8 from rakdver at gcc dot gnu dot org 2006-03-29 01:41 ---
Subject: Bug 25985
Author: rakdver
Date: Wed Mar 29 01:41:27 2006
New Revision: 112484
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=112484
Log:
PR tree-optimization/25985
* tree-ssa-loop-ni
--- Comment #7 from rakdver at gcc dot gnu dot org 2006-03-16 14:29 ---
Patch:
http://gcc.gnu.org/ml/gcc-patches/2006-03/msg01019.html
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rakdver at gcc dot gnu dot org changed:
What|Removed |Added
-
--- Comment #6 from rakdver at gcc dot gnu dot org 2006-03-16 03:15 ---
Actually, my previous comment is wrong, it is ivcanon (more precisely, # of
iterations analysis). Consider this testcase:
#include
void bla(int x)
{
if (x < -100)
exit (0);
}
int main(void)
{
int bits = 2
--- Comment #5 from rakdver at gcc dot gnu dot org 2006-03-16 02:49 ---
"Added canonical iv..." seems correct to me (at least, -fno-tree-loop-ivcanon
does not fix the problem). However, -fno-tree-loop-ivcanon -fno-ivopts fixes
it, so it is mine anyway.
--
http://gcc.gnu.org/bugzil
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rakdver at gcc dot gnu dot org changed:
What|Removed |Added
AssignedTo|unassigned at gcc dot gnu |rakdver at gcc dot gnu dot
|dot org
--- Comment #4 from rguenth at gcc dot gnu dot org 2006-03-15 20:15 ---
I'm sure Zdenek has an idea...
--
rguenth at gcc dot gnu dot org changed:
What|Removed |Added
--- Comment #3 from pinskia at gcc dot gnu dot org 2006-03-15 18:40 ---
Hmm, if I change the function to be:
#include
int main(void)
{
int bits = 25;
while (bits) {
printf("bits=%d\n",bits);
if (bits >= 8) {
bits -
--- Comment #2 from pinskia at gcc dot gnu dot org 2006-03-15 18:27 ---
Loop 1 iterates 2 times.
Added canonical iv to loop 1, 2 iterations.
That is wrong, it iterates 3 times at this point (an interation has already
been peeled before the loop).
This is from .ivcanon.
--
http://g
--
pinskia at gcc dot gnu dot org changed:
What|Removed |Added
Severity|critical|blocker
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25985
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