--- Comment #7 from jakub at gcc dot gnu dot org 2009-03-16 08:15 ---
Reduced testcase:
/* { dg-do compile } */
/* { dg-options -O2 -fprefetch-loop-arrays } */
void
foo (char *x, unsigned long y, unsigned char *z)
{
unsigned int c[256], *d;
for (d = c + 1; d c + 256; ++d)
*d
--- Comment #8 from pinskia at gmail dot com 2009-03-16 08:28 ---
Subject: Re: [4.3/4.4 Regression] ICE : in compare_values_warnv, at
tree-vrp.c:1073
Sent from my iPhone
On Mar 16, 2009, at 1:15 AM, jakub at gcc dot gnu dot org
gcc-bugzi...@gcc.gnu.org
wrote:
--- Comment
--- Comment #9 from jakub at gcc dot gnu dot org 2009-03-16 08:49 ---
No, this seems to be aprefetch's pass fault, at least in quick skim
*.cunroll seems to be ok typewise, while *.aprefetch has:
D.1649_44 = c + 1024;
D.1650_43 = (long unsigned int) D.1649_44;
if (c[2] =
--- Comment #10 from jakub at gcc dot gnu dot org 2009-03-16 09:43 ---
Seems tree-ssa-loop-niter.c has a lot of p+ issues. The following untested
patch fixes just the number_of_iterations_lt_to_ne bugs and fixes this
testcase:
--- gcc/tree-ssa-loop-niter.c.jj2009-03-04
--- Comment #11 from jakub at gcc dot gnu dot org 2009-03-16 16:07 ---
Subject: Bug 39455
Author: jakub
Date: Mon Mar 16 16:07:07 2009
New Revision: 144885
URL: http://gcc.gnu.org/viewcvs?root=gccview=revrev=144885
Log:
PR tree-optimization/39455
*
--- Comment #2 from rguenth at gcc dot gnu dot org 2009-03-13 14:03 ---
Confirmed. Works with 4.1 and 4.2.
--
rguenth at gcc dot gnu dot org changed:
What|Removed |Added
--- Comment #3 from hjl dot tools at gmail dot com 2009-03-13 14:43 ---
(In reply to comment #2)
Confirmed. Works with 4.1 and 4.2.
I got
[...@gnu-16 rrs]$ gcc -O2 -fprefetch-loop-array pr39455.c -S
cc1: error: unrecognized command line option -fprefetch-loop-array
[...@gnu-16
--- Comment #4 from jakub at gcc dot gnu dot org 2009-03-13 14:57 ---
s/array/arrays/
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39455
--- Comment #5 from hjl dot tools at gmail dot com 2009-03-13 16:38 ---
This is caused by revision 131502:
http://gcc.gnu.org/ml/gcc-cvs/2008-01/msg00263.html
http://gcc.gnu.org/ml/gcc-patches/2008-01/msg00539.html
--
hjl dot tools at gmail dot com changed:
What
--
rguenth at gcc dot gnu dot org changed:
What|Removed |Added
Priority|P3 |P2
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39455
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