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* [Bug c++/65017] New: valgrind error in get_constraint_for_address_of
@ 2015-02-11 10:51 dcb314 at hotmail dot com
2015-02-11 11:27 ` [Bug c++/65017] " rguenth at gcc dot gnu.org
` (5 more replies)
0 siblings, 6 replies; 7+ messages in thread
From: dcb314 at hotmail dot com @ 2015-02-11 10:51 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65017
Bug ID: 65017
Summary: valgrind error in get_constraint_for_address_of
Product: gcc
Version: 5.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: dcb314 at hotmail dot com
Created attachment 34722
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=34722&action=edit
C++ source code
Given the C++ source code from bug # 47903, compiled
by trunk of 20150211 with flag -O2, then valgrind
says
==22708== Conditional jump or move depends on uninitialised value(s)
==22708== at 0xD708FD: get_constraint_for_address_of
(tree-ssa-structalias.c:
3370)
==22708== by 0xD708FD: get_constraint_for_1(tree_node*, vec<constraint_expr,
va_heap, vl_ptr>*, bool, bool) (tree-ssa-structalias.c:3434)
==22708== by 0xD743C9: get_constraint_for_rhs (tree-ssa-structalias.c:3580)
==22708== by 0xD743C9: make_constraint_to(unsigned int, tree_node*)
(tree-ssa
-structalias.c:3703)
tree-ssa-structalias.c:3370 is
if (c->type == DEREF)
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug c++/65017] valgrind error in get_constraint_for_address_of
2015-02-11 10:51 [Bug c++/65017] New: valgrind error in get_constraint_for_address_of dcb314 at hotmail dot com
@ 2015-02-11 11:27 ` rguenth at gcc dot gnu.org
2015-02-11 13:06 ` rguenth at gcc dot gnu.org
` (4 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: rguenth at gcc dot gnu.org @ 2015-02-11 11:27 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65017
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2015-02-11
Assignee|unassigned at gcc dot gnu.org |rguenth at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Mine.
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug c++/65017] valgrind error in get_constraint_for_address_of
2015-02-11 10:51 [Bug c++/65017] New: valgrind error in get_constraint_for_address_of dcb314 at hotmail dot com
2015-02-11 11:27 ` [Bug c++/65017] " rguenth at gcc dot gnu.org
@ 2015-02-11 13:06 ` rguenth at gcc dot gnu.org
2015-02-11 13:24 ` dcb314 at hotmail dot com
` (3 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: rguenth at gcc dot gnu.org @ 2015-02-11 13:06 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65017
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
I can't reproduce this - how did you compile/configure GCC? Just tried both
--enable-checking and --enable-checking=release builds.
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug c++/65017] valgrind error in get_constraint_for_address_of
2015-02-11 10:51 [Bug c++/65017] New: valgrind error in get_constraint_for_address_of dcb314 at hotmail dot com
2015-02-11 11:27 ` [Bug c++/65017] " rguenth at gcc dot gnu.org
2015-02-11 13:06 ` rguenth at gcc dot gnu.org
@ 2015-02-11 13:24 ` dcb314 at hotmail dot com
2015-02-11 15:10 ` rguenth at gcc dot gnu.org
` (2 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: dcb314 at hotmail dot com @ 2015-02-11 13:24 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65017
--- Comment #3 from David Binderman <dcb314 at hotmail dot com> ---
(In reply to Richard Biener from comment #2)
> I can't reproduce this - how did you compile/configure GCC? Just tried both
> --enable-checking and --enable-checking=release builds.
../src/trunk/configure --prefix=/home/dcb/gcc/results \
--disable-bootstrap \
--disable-werror \
--enable-checking=yes \
--enable-languages=c,c++,fortran \
CC="clang -fheinous-gnu-extensions" \
CXX="clang++ -fheinous-gnu-extensions"
on AMD Phenom.
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug c++/65017] valgrind error in get_constraint_for_address_of
2015-02-11 10:51 [Bug c++/65017] New: valgrind error in get_constraint_for_address_of dcb314 at hotmail dot com
` (2 preceding siblings ...)
2015-02-11 13:24 ` dcb314 at hotmail dot com
@ 2015-02-11 15:10 ` rguenth at gcc dot gnu.org
2015-02-11 16:50 ` dcb314 at hotmail dot com
2015-02-12 8:54 ` rguenth at gcc dot gnu.org
5 siblings, 0 replies; 7+ messages in thread
From: rguenth at gcc dot gnu.org @ 2015-02-11 15:10 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65017
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |WAITING
--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to rguenther@suse.de from comment #4)
> On Wed, 11 Feb 2015, dcb314 at hotmail dot com wrote:
>
> > https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65017
> >
> > --- Comment #3 from David Binderman <dcb314 at hotmail dot com> ---
> > (In reply to Richard Biener from comment #2)
> > > I can't reproduce this - how did you compile/configure GCC? Just tried both
> > > --enable-checking and --enable-checking=release builds.
> >
> > ../src/trunk/configure --prefix=/home/dcb/gcc/results \
> > --disable-bootstrap \
> > --disable-werror \
> > --enable-checking=yes \
> > --enable-languages=c,c++,fortran \
> > CC="clang -fheinous-gnu-extensions" \
> > CXX="clang++ -fheinous-gnu-extensions"
> >
> > on AMD Phenom.
>
> Uh, so it might be very well clang miscompiling it. I don't have
> clang to reproduce, so can you get me some more information,
> like
>
> (gdb) p debug_tree (t)
>
> at the point it barfs? Can you disable optimization of clang?
> Thus build with CFLAGS="-g -O0" CXXFLAGS="-g -O0"?
Can't reproduce when building GCC with clang 3.3 like you specified above.
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug c++/65017] valgrind error in get_constraint_for_address_of
2015-02-11 10:51 [Bug c++/65017] New: valgrind error in get_constraint_for_address_of dcb314 at hotmail dot com
` (3 preceding siblings ...)
2015-02-11 15:10 ` rguenth at gcc dot gnu.org
@ 2015-02-11 16:50 ` dcb314 at hotmail dot com
2015-02-12 8:54 ` rguenth at gcc dot gnu.org
5 siblings, 0 replies; 7+ messages in thread
From: dcb314 at hotmail dot com @ 2015-02-11 16:50 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65017
--- Comment #6 from David Binderman <dcb314 at hotmail dot com> ---
(In reply to Richard Biener from comment #5)
> Can't reproduce when building GCC with clang 3.3 like you specified above.
I removed clang from the configure of gcc, rebuilt gcc, tried again
and the problem went away !
A version of clang > 3.3 but <= 3.5 looks to be the culprit.
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug c++/65017] valgrind error in get_constraint_for_address_of
2015-02-11 10:51 [Bug c++/65017] New: valgrind error in get_constraint_for_address_of dcb314 at hotmail dot com
` (4 preceding siblings ...)
2015-02-11 16:50 ` dcb314 at hotmail dot com
@ 2015-02-12 8:54 ` rguenth at gcc dot gnu.org
5 siblings, 0 replies; 7+ messages in thread
From: rguenth at gcc dot gnu.org @ 2015-02-12 8:54 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65017
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |RESOLVED
Resolution|--- |INVALID
--- Comment #7 from Richard Biener <rguenth at gcc dot gnu.org> ---
Thans for checking.
^ permalink raw reply [flat|nested] 7+ messages in thread
end of thread, other threads:[~2015-02-12 8:54 UTC | newest]
Thread overview: 7+ messages (download: mbox.gz / follow: Atom feed)
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2015-02-11 10:51 [Bug c++/65017] New: valgrind error in get_constraint_for_address_of dcb314 at hotmail dot com
2015-02-11 11:27 ` [Bug c++/65017] " rguenth at gcc dot gnu.org
2015-02-11 13:06 ` rguenth at gcc dot gnu.org
2015-02-11 13:24 ` dcb314 at hotmail dot com
2015-02-11 15:10 ` rguenth at gcc dot gnu.org
2015-02-11 16:50 ` dcb314 at hotmail dot com
2015-02-12 8:54 ` rguenth at gcc dot gnu.org
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