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* [Bug c/58364] New: likely wrong code bug
@ 2013-09-08 19:43 regehr at cs dot utah.edu
2013-09-08 21:01 ` [Bug tree-optimization/58364] [4.8/4.9 Regression] " glisse at gcc dot gnu.org
` (6 more replies)
0 siblings, 7 replies; 8+ messages in thread
From: regehr at cs dot utah.edu @ 2013-09-08 19:43 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58364
Bug ID: 58364
Summary: likely wrong code bug
Product: gcc
Version: 4.9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: regehr at cs dot utah.edu
CC: chenyang at cs dot utah.edu
regehr@john-home ~/z/reduce/r107 $ gcc -O0 small.c ; ./a.out
regehr@john-home ~/z/reduce/r107 $ gcc -O1 small.c ; ./a.out
x
regehr@john-home ~/z/reduce/r107 $ cat small.c
int printf(const char *, ...);
int x3 (int x4) {
return x4 < 0 ? 1 : x4;
}
int x0 = 1, x1, x2;
int main (void) {
if (x3(x0 > x2 == (x1 = 0))) {
printf("x\n");
}
return 0;
}
regehr@john-home ~/z/reduce/r107 $ gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/home/regehr/z/compiler-install/gcc-r202341-install/libexec/gcc/x86_64-unknown-linux-gnu/4.9.0/lto-wrapper
Target: x86_64-unknown-linux-gnu
Configured with: /home/regehr/z/compiler-source/gcc/configure
--prefix=/home/regehr/z/compiler-install/gcc-r202341-install
--enable-languages=c,c++ --disable-multilib
Thread model: posix
gcc version 4.9.0 20130906 (experimental) (GCC)
^ permalink raw reply [flat|nested] 8+ messages in thread* [Bug tree-optimization/58364] [4.8/4.9 Regression] likely wrong code bug 2013-09-08 19:43 [Bug c/58364] New: likely wrong code bug regehr at cs dot utah.edu @ 2013-09-08 21:01 ` glisse at gcc dot gnu.org 2013-09-09 6:01 ` jakub at gcc dot gnu.org ` (5 subsequent siblings) 6 siblings, 0 replies; 8+ messages in thread From: glisse at gcc dot gnu.org @ 2013-09-08 21:01 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58364 Marc Glisse <glisse at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Keywords| |wrong-code Status|UNCONFIRMED |NEW Last reconfirmed| |2013-09-08 Component|c |tree-optimization Summary|likely wrong code bug |[4.8/4.9 Regression] likely | |wrong code bug Ever confirmed|0 |1 --- Comment #1 from Marc Glisse <glisse at gcc dot gnu.org> --- Something strange seems to happen in reassoc. ^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug tree-optimization/58364] [4.8/4.9 Regression] likely wrong code bug 2013-09-08 19:43 [Bug c/58364] New: likely wrong code bug regehr at cs dot utah.edu 2013-09-08 21:01 ` [Bug tree-optimization/58364] [4.8/4.9 Regression] " glisse at gcc dot gnu.org @ 2013-09-09 6:01 ` jakub at gcc dot gnu.org 2013-09-09 9:56 ` jakub at gcc dot gnu.org ` (4 subsequent siblings) 6 siblings, 0 replies; 8+ messages in thread From: jakub at gcc dot gnu.org @ 2013-09-09 6:01 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58364 Jakub Jelinek <jakub at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |jakub at gcc dot gnu.org Target Milestone|--- |4.8.2 --- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> --- Started with r193028 . I'll have a look. ^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug tree-optimization/58364] [4.8/4.9 Regression] likely wrong code bug 2013-09-08 19:43 [Bug c/58364] New: likely wrong code bug regehr at cs dot utah.edu 2013-09-08 21:01 ` [Bug tree-optimization/58364] [4.8/4.9 Regression] " glisse at gcc dot gnu.org 2013-09-09 6:01 ` jakub at gcc dot gnu.org @ 2013-09-09 9:56 ` jakub at gcc dot gnu.org 2013-09-09 17:10 ` jakub at gcc dot gnu.org ` (3 subsequent siblings) 6 siblings, 0 replies; 8+ messages in thread From: jakub at gcc dot gnu.org @ 2013-09-09 9:56 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58364 Jakub Jelinek <jakub at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |ASSIGNED Assignee|unassigned at gcc dot gnu.org |jakub at gcc dot gnu.org --- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> --- Created attachment 30771 --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=30771&action=edit gcc49-pr58364.patch Untested fix. ^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug tree-optimization/58364] [4.8/4.9 Regression] likely wrong code bug 2013-09-08 19:43 [Bug c/58364] New: likely wrong code bug regehr at cs dot utah.edu ` (2 preceding siblings ...) 2013-09-09 9:56 ` jakub at gcc dot gnu.org @ 2013-09-09 17:10 ` jakub at gcc dot gnu.org 2013-09-09 17:11 ` jakub at gcc dot gnu.org ` (2 subsequent siblings) 6 siblings, 0 replies; 8+ messages in thread From: jakub at gcc dot gnu.org @ 2013-09-09 17:10 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58364 --- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> --- Author: jakub Date: Mon Sep 9 17:09:59 2013 New Revision: 202409 URL: http://gcc.gnu.org/viewcvs?rev=202409&root=gcc&view=rev Log: PR tree-optimization/58364 * tree-ssa-reassoc.c (init_range_entry): For BIT_NOT_EXPR on BOOLEAN_TYPE, only invert in_p and continue with arg0 if the current range can't be an unconditional true or false. * gcc.c-torture/execute/pr58364.c: New test. Added: trunk/gcc/testsuite/gcc.c-torture/execute/pr58364.c Modified: trunk/gcc/ChangeLog trunk/gcc/testsuite/ChangeLog trunk/gcc/tree-ssa-reassoc.c ^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug tree-optimization/58364] [4.8/4.9 Regression] likely wrong code bug 2013-09-08 19:43 [Bug c/58364] New: likely wrong code bug regehr at cs dot utah.edu ` (3 preceding siblings ...) 2013-09-09 17:10 ` jakub at gcc dot gnu.org @ 2013-09-09 17:11 ` jakub at gcc dot gnu.org 2013-09-09 17:13 ` jakub at gcc dot gnu.org 2013-09-10 13:25 ` ebotcazou at gcc dot gnu.org 6 siblings, 0 replies; 8+ messages in thread From: jakub at gcc dot gnu.org @ 2013-09-09 17:11 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58364 --- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> --- Author: jakub Date: Mon Sep 9 17:11:05 2013 New Revision: 202410 URL: http://gcc.gnu.org/viewcvs?rev=202410&root=gcc&view=rev Log: PR tree-optimization/58364 * tree-ssa-reassoc.c (init_range_entry): For BIT_NOT_EXPR on BOOLEAN_TYPE, only invert in_p and continue with arg0 if the current range can't be an unconditional true or false. * gcc.c-torture/execute/pr58364.c: New test. Added: branches/gcc-4_8-branch/gcc/testsuite/gcc.c-torture/execute/pr58364.c Modified: branches/gcc-4_8-branch/gcc/ChangeLog branches/gcc-4_8-branch/gcc/testsuite/ChangeLog branches/gcc-4_8-branch/gcc/tree-ssa-reassoc.c ^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug tree-optimization/58364] [4.8/4.9 Regression] likely wrong code bug 2013-09-08 19:43 [Bug c/58364] New: likely wrong code bug regehr at cs dot utah.edu ` (4 preceding siblings ...) 2013-09-09 17:11 ` jakub at gcc dot gnu.org @ 2013-09-09 17:13 ` jakub at gcc dot gnu.org 2013-09-10 13:25 ` ebotcazou at gcc dot gnu.org 6 siblings, 0 replies; 8+ messages in thread From: jakub at gcc dot gnu.org @ 2013-09-09 17:13 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58364 Jakub Jelinek <jakub at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|ASSIGNED |RESOLVED Resolution|--- |FIXED --- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> --- Fixed. ^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug tree-optimization/58364] [4.8/4.9 Regression] likely wrong code bug 2013-09-08 19:43 [Bug c/58364] New: likely wrong code bug regehr at cs dot utah.edu ` (5 preceding siblings ...) 2013-09-09 17:13 ` jakub at gcc dot gnu.org @ 2013-09-10 13:25 ` ebotcazou at gcc dot gnu.org 6 siblings, 0 replies; 8+ messages in thread From: ebotcazou at gcc dot gnu.org @ 2013-09-10 13:25 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58364 Eric Botcazou <ebotcazou at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |ebotcazou at gcc dot gnu.org --- Comment #7 from Eric Botcazou <ebotcazou at gcc dot gnu.org> --- r195642 is an equivalent fix in the folder (make_range_step). ^ permalink raw reply [flat|nested] 8+ messages in thread
end of thread, other threads:[~2013-09-10 13:25 UTC | newest] Thread overview: 8+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2013-09-08 19:43 [Bug c/58364] New: likely wrong code bug regehr at cs dot utah.edu 2013-09-08 21:01 ` [Bug tree-optimization/58364] [4.8/4.9 Regression] " glisse at gcc dot gnu.org 2013-09-09 6:01 ` jakub at gcc dot gnu.org 2013-09-09 9:56 ` jakub at gcc dot gnu.org 2013-09-09 17:10 ` jakub at gcc dot gnu.org 2013-09-09 17:11 ` jakub at gcc dot gnu.org 2013-09-09 17:13 ` jakub at gcc dot gnu.org 2013-09-10 13:25 ` ebotcazou at gcc dot gnu.org
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