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* [Bug c++/60729] New: Compiler failure for combination of -ftrapv and -O3: compiler error: in prepare_cmp_insn
@ 2014-04-01 13:22 rppawlo at sandia dot gov
2014-04-01 13:28 ` [Bug c++/60729] " rppawlo at sandia dot gov
` (5 more replies)
0 siblings, 6 replies; 7+ messages in thread
From: rppawlo at sandia dot gov @ 2014-04-01 13:22 UTC (permalink / raw)
To: gcc-bugs
[-- Warning: decoded text below may be mangled, UTF-8 assumed --]
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60729
Bug ID: 60729
Summary: Compiler failure for combination of -ftrapv and -O3:
compiler error: in prepare_cmp_insn
Product: gcc
Version: 4.8.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: rppawlo at sandia dot gov
Created attachment 32514
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=32514&action=edit
test file
Hi,
I'm running stock Ubuntu 13.10 and get a g++ compiler error when using a
certain commbination of compiler options.
The attached file reproduces the bug:
*************************BEGIN FILE***********************
// This test generates an inernal compiler failure in g++ 4.8.1 on
// ubuntu 13.10. The combination of -O3 and -ftrapv causes the issue.
// You can drop to -O2 or remove -ftrapv to fix.
// The following compile works:
// g++ -O3 -c test.cpp
// g++ -O2 -ftrapv -c test.cpp
// The following compile fails:
// g++ -ftrapv -O3 -c test.cpp
#include <cmath>
void doSomething(int dim, double *Y, double *A)
{
for (int k=0; k<dim; k++)
Y[k] += std::abs(A[k]);
}
*************************END FILE***********************
Here's the output:
rppawlo@drekar:~$ g++ -O3 -c test.cpp
rppawlo@drekar:~$ g++ -O2 -ftrapv -c test.cpp
rppawlo@drekar:~$ g++ -ftrapv -O3 -c test.cpp
test.cpp: In function âvoid doSomething(int, double*, double*)â:
test.cpp:17:27: internal compiler error: in prepare_cmp_insn, at optabs.c:4190
Y[k] += std::abs(A[k]);
^
Please submit a full bug report,
with preprocessed source if appropriate.
See <file:///usr/share/doc/gcc-4.8/README.Bugs> for instructions.
Preprocessed source stored into /tmp/cccvQgai.out file, please attach this to
your bugreport.
rppawlo@drekar:~$
Here's some info about my machine/environment:
rppawlo@drekar:~$ g++ --version
g++ (Ubuntu/Linaro 4.8.1-10ubuntu9) 4.8.1
Copyright (C) 2013 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
rppawlo@drekar:~$ uname -a
Linux drekar 3.11.0-18-generic #32-Ubuntu SMP Tue Feb 18 21:11:14 UTC 2014
x86_64 x86_64 x86_64 GNU/Linux
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From: "rppawlo at sandia dot gov" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/60729] Compiler failure for combination of -ftrapv and -O3: compiler error: in prepare_cmp_insn
Date: Tue, 01 Apr 2014 13:23:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id`729
--- Comment #1 from rppawlo at sandia dot gov ---
Created attachment 32515
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id2515&actioníit
output file generated with -save-temps
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug c++/60729] Compiler failure for combination of -ftrapv and -O3: compiler error: in prepare_cmp_insn
2014-04-01 13:22 [Bug c++/60729] New: Compiler failure for combination of -ftrapv and -O3: compiler error: in prepare_cmp_insn rppawlo at sandia dot gov
@ 2014-04-01 13:28 ` rppawlo at sandia dot gov
2014-04-01 14:35 ` rguenth at gcc dot gnu.org
` (4 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: rppawlo at sandia dot gov @ 2014-04-01 13:28 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60729
--- Comment #2 from rppawlo at sandia dot gov ---
Created attachment 32516
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=32516&action=edit
error file generated from compiler failure
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug c++/60729] Compiler failure for combination of -ftrapv and -O3: compiler error: in prepare_cmp_insn
2014-04-01 13:22 [Bug c++/60729] New: Compiler failure for combination of -ftrapv and -O3: compiler error: in prepare_cmp_insn rppawlo at sandia dot gov
2014-04-01 13:28 ` [Bug c++/60729] " rppawlo at sandia dot gov
@ 2014-04-01 14:35 ` rguenth at gcc dot gnu.org
2014-04-02 8:27 ` rguenth at gcc dot gnu.org
` (3 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: rguenth at gcc dot gnu.org @ 2014-04-01 14:35 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60729
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2014-04-01
Assignee|unassigned at gcc dot gnu.org |rguenth at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed. The issue is that we vectorize the abs() but fail to provide
a negv_optab for V2DFmode and the fallback expansion fails as well
(this path isn't able to handle the vector case at all).
Issue with expand_abs_nojump which uses absv_optab for FP modes.
Index: gcc/optabs.c
===================================================================
--- gcc/optabs.c (revision 208988)
+++ gcc/optabs.c (working copy)
@@ -3384,7 +3384,8 @@ expand_abs_nojump (enum machine_mode mod
{
rtx temp;
- if (! flag_trapv)
+ if (GET_MODE_CLASS (mode) != MODE_INT
+ || ! flag_trapv)
result_unsignedp = 1;
/* First try to do it with a special abs instruction. */
@@ -3407,7 +3408,8 @@ expand_abs_nojump (enum machine_mode mod
{
rtx last = get_last_insn ();
- temp = expand_unop (mode, neg_optab, op0, NULL_RTX, 0);
+ temp = expand_unop (mode, result_unsignedp ? neg_optab : negv_optab,
+ op0, NULL_RTX, 0);
if (temp != 0)
temp = expand_binop (mode, smax_optab, op0, temp, target, 0,
OPTAB_WIDEN);
@@ -3449,7 +3451,8 @@ expand_abs (enum machine_mode mode, rtx
{
rtx temp, op1;
- if (! flag_trapv)
+ if (GET_MODE_CLASS (mode) != MODE_INT
+ || ! flag_trapv)
result_unsignedp = 1;
temp = expand_abs_nojump (mode, op0, target, result_unsignedp);
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug c++/60729] Compiler failure for combination of -ftrapv and -O3: compiler error: in prepare_cmp_insn
2014-04-01 13:22 [Bug c++/60729] New: Compiler failure for combination of -ftrapv and -O3: compiler error: in prepare_cmp_insn rppawlo at sandia dot gov
2014-04-01 13:28 ` [Bug c++/60729] " rppawlo at sandia dot gov
2014-04-01 14:35 ` rguenth at gcc dot gnu.org
@ 2014-04-02 8:27 ` rguenth at gcc dot gnu.org
2014-04-02 8:28 ` [Bug middle-end/60729] [4.8 Regression] " rguenth at gcc dot gnu.org
` (2 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: rguenth at gcc dot gnu.org @ 2014-04-02 8:27 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60729
--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed Apr 2 08:26:57 2014
New Revision: 209012
URL: http://gcc.gnu.org/viewcvs?rev=209012&root=gcc&view=rev
Log:
2014-04-02 Richard Biener <rguenther@suse.de>
PR middle-end/60729
* optabs.c (expand_abs_nojump): Honor flag_trapv only for
MODE_INTs. Properly use negv_optab.
(expand_abs): Likewise.
* g++.dg/vect/pr60729.cc: New testcase.
Added:
trunk/gcc/testsuite/g++.dg/vect/pr60729.cc
Modified:
trunk/gcc/ChangeLog
trunk/gcc/optabs.c
trunk/gcc/testsuite/ChangeLog
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug middle-end/60729] [4.8 Regression] Compiler failure for combination of -ftrapv and -O3: compiler error: in prepare_cmp_insn
2014-04-01 13:22 [Bug c++/60729] New: Compiler failure for combination of -ftrapv and -O3: compiler error: in prepare_cmp_insn rppawlo at sandia dot gov
` (2 preceding siblings ...)
2014-04-02 8:27 ` rguenth at gcc dot gnu.org
@ 2014-04-02 8:28 ` rguenth at gcc dot gnu.org
2014-04-23 12:49 ` rguenth at gcc dot gnu.org
2014-04-23 12:52 ` rguenth at gcc dot gnu.org
5 siblings, 0 replies; 7+ messages in thread
From: rguenth at gcc dot gnu.org @ 2014-04-02 8:28 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60729
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Component|c++ |middle-end
Known to work| |4.7.3, 4.9.0
Target Milestone|--- |4.8.3
Summary|Compiler failure for |[4.8 Regression] Compiler
|combination of -ftrapv and |failure for combination of
|-O3: compiler error: in |-ftrapv and -O3: compiler
|prepare_cmp_insn |error: in prepare_cmp_insn
--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed on trunk sofar.
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug middle-end/60729] [4.8 Regression] Compiler failure for combination of -ftrapv and -O3: compiler error: in prepare_cmp_insn
2014-04-01 13:22 [Bug c++/60729] New: Compiler failure for combination of -ftrapv and -O3: compiler error: in prepare_cmp_insn rppawlo at sandia dot gov
` (3 preceding siblings ...)
2014-04-02 8:28 ` [Bug middle-end/60729] [4.8 Regression] " rguenth at gcc dot gnu.org
@ 2014-04-23 12:49 ` rguenth at gcc dot gnu.org
2014-04-23 12:52 ` rguenth at gcc dot gnu.org
5 siblings, 0 replies; 7+ messages in thread
From: rguenth at gcc dot gnu.org @ 2014-04-23 12:49 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60729
--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed Apr 23 12:49:04 2014
New Revision: 209697
URL: http://gcc.gnu.org/viewcvs?rev=209697&root=gcc&view=rev
Log:
2014-04-23 Richard Biener <rguenther@suse.de>
Backport from mainline
2014-04-02 Richard Biener <rguenther@suse.de>
PR middle-end/60729
* optabs.c (expand_abs_nojump): Honor flag_trapv only for
MODE_INTs. Properly use negv_optab.
(expand_abs): Likewise.
* g++.dg/vect/pr60729.cc: New testcase.
2014-04-03 Richard Biener <rguenther@suse.de>
PR tree-optimization/60740
* graphite-scop-detection.c (stmt_simple_for_scop_p): Iterate
over all GIMPLE_COND operands.
* gcc.dg/graphite/pr60740.c: New testcase.
Added:
branches/gcc-4_8-branch/gcc/testsuite/g++.dg/vect/pr60729.cc
branches/gcc-4_8-branch/gcc/testsuite/gcc.dg/graphite/pr60740.c
Modified:
branches/gcc-4_8-branch/gcc/ChangeLog
branches/gcc-4_8-branch/gcc/graphite-scop-detection.c
branches/gcc-4_8-branch/gcc/optabs.c
branches/gcc-4_8-branch/gcc/testsuite/ChangeLog
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug middle-end/60729] [4.8 Regression] Compiler failure for combination of -ftrapv and -O3: compiler error: in prepare_cmp_insn
2014-04-01 13:22 [Bug c++/60729] New: Compiler failure for combination of -ftrapv and -O3: compiler error: in prepare_cmp_insn rppawlo at sandia dot gov
` (4 preceding siblings ...)
2014-04-23 12:49 ` rguenth at gcc dot gnu.org
@ 2014-04-23 12:52 ` rguenth at gcc dot gnu.org
5 siblings, 0 replies; 7+ messages in thread
From: rguenth at gcc dot gnu.org @ 2014-04-23 12:52 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60729
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #7 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
^ permalink raw reply [flat|nested] 7+ messages in thread
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2014-04-01 13:22 [Bug c++/60729] New: Compiler failure for combination of -ftrapv and -O3: compiler error: in prepare_cmp_insn rppawlo at sandia dot gov
2014-04-01 13:28 ` [Bug c++/60729] " rppawlo at sandia dot gov
2014-04-01 14:35 ` rguenth at gcc dot gnu.org
2014-04-02 8:27 ` rguenth at gcc dot gnu.org
2014-04-02 8:28 ` [Bug middle-end/60729] [4.8 Regression] " rguenth at gcc dot gnu.org
2014-04-23 12:49 ` rguenth at gcc dot gnu.org
2014-04-23 12:52 ` rguenth at gcc dot gnu.org
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