--- Comment #8 from pixel at mandriva dot com 2007-08-08 08:45 ---
Known to work: 4.1.2 4.3.0
Known to fail: 4.2.1
--
pixel at mandriva dot com changed:
What|Removed |Added
--- Comment #9 from pinskia at gcc dot gnu dot org 2007-08-08 09:07 ---
This should work on the trunk also via the pointer plus branch merge where we
no longer get a multiplication in a pointer type.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32544
--- Comment #5 from pixel at mandriva dot com 2007-08-07 22:33 ---
Created an attachment (id=14038)
-- (http://gcc.gnu.org/bugzilla/attachment.cgi?id=14038action=view)
miscompiles with gcc 4.2 -O2
here is a simple test case reproducing the issue.
eg:
% gcc -O2 ivopts-issue.c
--- Comment #6 from pixel at mandriva dot com 2007-08-07 22:41 ---
more info: the tree-vrp issue is raised by ivopts pass:
without ivopts:
D.1541_13 = 3 - i_31;
D.1542_14 = (unsigned int) D.1541_13;
D.1543_15 = D.1542_14 * 4;
D.1544_16 = (int *) D.1543_15;
with ivopts:
--- Comment #7 from pixel at mandriva dot com 2007-08-07 22:45 ---
the following patch fixes the testcase ivopts-issue.c, but breaks everything
else... someone else will find a correct patch :)
--- gcc-4.2.1/gcc/tree-ssa-loop-ivopts.c.pix2006-10-06 21:32:04.0
+0200
+++
--- Comment #4 from rguenth at gcc dot gnu dot org 2007-07-04 09:49 ---
Sorry, I can't see what is wrong. There is no effective difference in assembly
with/without -ftree-vrp.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32544
--- Comment #1 from bero at arklinux dot org 2007-06-29 08:16 ---
Created an attachment (id=13804)
-- (http://gcc.gnu.org/bugzilla/attachment.cgi?id=13804action=view)
Preprocessed source, bzip2-ed
Attaching preprocessed source of r300_state.c
--
--- Comment #2 from rguenth at gcc dot gnu dot org 2007-06-29 08:46 ---
Can you narrow it down to a specific function?
--
rguenth at gcc dot gnu dot org changed:
What|Removed |Added
--- Comment #3 from bero at arklinux dot org 2007-06-29 14:17 ---
r300SetupPixelShader()
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32544
