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* [Bug c++/53693] New: [4.7 regression] ICE in vect_get_vec_def_for_stmt_copy, at tree-vect-stmts.c:1438
@ 2012-06-16 2:01 bearoso at gmail dot com
2012-06-16 15:01 ` [Bug tree-optimization/53693] [4.7/4.8 " hjl.tools at gmail dot com
` (7 more replies)
0 siblings, 8 replies; 9+ messages in thread
From: bearoso at gmail dot com @ 2012-06-16 2:01 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53693
Bug #: 53693
Summary: [4.7 regression] ICE in
vect_get_vec_def_for_stmt_copy, at
tree-vect-stmts.c:1438
Classification: Unclassified
Product: gcc
Version: 4.7.2
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
AssignedTo: unassigned@gcc.gnu.org
ReportedBy: bearoso@gmail.com
Created attachment 27628
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=27628
Code that generates ICE
With 4.7.0 and up I'm now getting an ICE when building this bit of code with
-O3 or -ftree-vectorize and the C++ compiler:
$ g++ -O1 -ftree-vectorize ice.cxx -o ice
ice.cxx: In function 'void filter_scanlines(void*, int, void*, int, int, int)':
ice.cxx:2:1: internal compiler error: in vect_get_vec_def_for_stmt_copy, at
tree-vect-stmts.c:1438
^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug tree-optimization/53693] [4.7/4.8 regression] ICE in vect_get_vec_def_for_stmt_copy, at tree-vect-stmts.c:1438
2012-06-16 2:01 [Bug c++/53693] New: [4.7 regression] ICE in vect_get_vec_def_for_stmt_copy, at tree-vect-stmts.c:1438 bearoso at gmail dot com
@ 2012-06-16 15:01 ` hjl.tools at gmail dot com
2012-06-18 9:11 ` rguenth at gcc dot gnu.org
` (6 subsequent siblings)
7 siblings, 0 replies; 9+ messages in thread
From: hjl.tools at gmail dot com @ 2012-06-16 15:01 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53693
H.J. Lu <hjl.tools at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2012-06-16
Target Milestone|--- |4.7.3
Summary|[4.7 regression] ICE in |[4.7/4.8 regression] ICE in
|vect_get_vec_def_for_stmt_c |vect_get_vec_def_for_stmt_c
|opy, at |opy, at
|tree-vect-stmts.c:1438 |tree-vect-stmts.c:1438
Ever Confirmed|0 |1
--- Comment #1 from H.J. Lu <hjl.tools at gmail dot com> 2012-06-16 15:01:03 UTC ---
It is caused by revision 177409:
http://gcc.gnu.org/ml/gcc-cvs/2011-08/msg00420.html
^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug tree-optimization/53693] [4.7/4.8 regression] ICE in vect_get_vec_def_for_stmt_copy, at tree-vect-stmts.c:1438
2012-06-16 2:01 [Bug c++/53693] New: [4.7 regression] ICE in vect_get_vec_def_for_stmt_copy, at tree-vect-stmts.c:1438 bearoso at gmail dot com
2012-06-16 15:01 ` [Bug tree-optimization/53693] [4.7/4.8 " hjl.tools at gmail dot com
@ 2012-06-18 9:11 ` rguenth at gcc dot gnu.org
2012-06-18 10:22 ` rguenth at gcc dot gnu.org
` (5 subsequent siblings)
7 siblings, 0 replies; 9+ messages in thread
From: rguenth at gcc dot gnu.org @ 2012-06-18 9:11 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53693
Richard Guenther <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
AssignedTo|unassigned at gcc dot |rguenth at gcc dot gnu.org
|gnu.org |
--- Comment #2 from Richard Guenther <rguenth at gcc dot gnu.org> 2012-06-18 09:11:00 UTC ---
Confirmed, mine.
^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug tree-optimization/53693] [4.7/4.8 regression] ICE in vect_get_vec_def_for_stmt_copy, at tree-vect-stmts.c:1438
2012-06-16 2:01 [Bug c++/53693] New: [4.7 regression] ICE in vect_get_vec_def_for_stmt_copy, at tree-vect-stmts.c:1438 bearoso at gmail dot com
2012-06-16 15:01 ` [Bug tree-optimization/53693] [4.7/4.8 " hjl.tools at gmail dot com
2012-06-18 9:11 ` rguenth at gcc dot gnu.org
@ 2012-06-18 10:22 ` rguenth at gcc dot gnu.org
2012-06-18 10:56 ` rguenth at gcc dot gnu.org
` (4 subsequent siblings)
7 siblings, 0 replies; 9+ messages in thread
From: rguenth at gcc dot gnu.org @ 2012-06-18 10:22 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53693
--- Comment #3 from Richard Guenther <rguenth at gcc dot gnu.org> 2012-06-18 10:22:24 UTC ---
Reduced testcase, it seems we are getting conflicts between two patterns.
void
filter_scanlines (void *src_buffer, void *dst_buffer, int dst_pitch, int width)
{
int x;
unsigned short *src, *dst_a, *dst_b;
src = (unsigned short *) src_buffer;
dst_a = (unsigned short *) dst_buffer;
dst_b = ((unsigned short *) dst_buffer) + (dst_pitch >> 1);
for (x = 0; x < width; x++)
{
unsigned char gs, gh;
gs = src[x];
gh = gs + (gs >> 1);
dst_a[x] = (gh << 5) | (gh);
dst_b[x] = ((gs - gh) << 5) | (gs - gh);
}
}
^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug tree-optimization/53693] [4.7/4.8 regression] ICE in vect_get_vec_def_for_stmt_copy, at tree-vect-stmts.c:1438
2012-06-16 2:01 [Bug c++/53693] New: [4.7 regression] ICE in vect_get_vec_def_for_stmt_copy, at tree-vect-stmts.c:1438 bearoso at gmail dot com
` (2 preceding siblings ...)
2012-06-18 10:22 ` rguenth at gcc dot gnu.org
@ 2012-06-18 10:56 ` rguenth at gcc dot gnu.org
2012-06-18 14:05 ` rguenth at gcc dot gnu.org
` (3 subsequent siblings)
7 siblings, 0 replies; 9+ messages in thread
From: rguenth at gcc dot gnu.org @ 2012-06-18 10:56 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53693
--- Comment #4 from Richard Guenther <rguenth at gcc dot gnu.org> 2012-06-18 10:56:23 UTC ---
Fact is we detect
D.2215_20 = (int) gh_18;
D.2216_21 = D.2215_20 << 5;
D.2217_22 = (signed short) D.2216_21;
but do not see the use
D.2222_27 = D.2211_15 - D.2215_20;
for some reason and thus set STMT_IN_PATTER_P on the D.2215_20 def and fail
to vectorize it. I am testing a patch.
^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug tree-optimization/53693] [4.7/4.8 regression] ICE in vect_get_vec_def_for_stmt_copy, at tree-vect-stmts.c:1438
2012-06-16 2:01 [Bug c++/53693] New: [4.7 regression] ICE in vect_get_vec_def_for_stmt_copy, at tree-vect-stmts.c:1438 bearoso at gmail dot com
` (3 preceding siblings ...)
2012-06-18 10:56 ` rguenth at gcc dot gnu.org
@ 2012-06-18 14:05 ` rguenth at gcc dot gnu.org
2012-06-18 14:11 ` [Bug tree-optimization/53693] [4.7 " rguenth at gcc dot gnu.org
` (2 subsequent siblings)
7 siblings, 0 replies; 9+ messages in thread
From: rguenth at gcc dot gnu.org @ 2012-06-18 14:05 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53693
--- Comment #5 from Richard Guenther <rguenth at gcc dot gnu.org> 2012-06-18 14:05:33 UTC ---
Author: rguenth
Date: Mon Jun 18 14:05:27 2012
New Revision: 188733
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=188733
Log:
2012-06-18 Richard Guenther <rguenther@suse.de>
PR tree-optimization/53693
* tree-vect-patterns.c (vect_operation_fits_smaller_type):
Reject operands with more than one use.
* g++.dg/torture/pr53693.C: New testcase.
Added:
trunk/gcc/testsuite/g++.dg/torture/pr53693.C
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-vect-patterns.c
^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug tree-optimization/53693] [4.7 regression] ICE in vect_get_vec_def_for_stmt_copy, at tree-vect-stmts.c:1438
2012-06-16 2:01 [Bug c++/53693] New: [4.7 regression] ICE in vect_get_vec_def_for_stmt_copy, at tree-vect-stmts.c:1438 bearoso at gmail dot com
` (4 preceding siblings ...)
2012-06-18 14:05 ` rguenth at gcc dot gnu.org
@ 2012-06-18 14:11 ` rguenth at gcc dot gnu.org
2012-07-06 9:21 ` rguenth at gcc dot gnu.org
2012-07-06 9:26 ` rguenth at gcc dot gnu.org
7 siblings, 0 replies; 9+ messages in thread
From: rguenth at gcc dot gnu.org @ 2012-06-18 14:11 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53693
Richard Guenther <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to work| |4.8.0
Target Milestone|4.7.3 |4.7.2
Summary|[4.7/4.8 regression] ICE in |[4.7 regression] ICE in
|vect_get_vec_def_for_stmt_c |vect_get_vec_def_for_stmt_c
|opy, at |opy, at
|tree-vect-stmts.c:1438 |tree-vect-stmts.c:1438
Known to fail| |4.7.1
--- Comment #6 from Richard Guenther <rguenth at gcc dot gnu.org> 2012-06-18 14:10:57 UTC ---
Fixed on trunk sofar.
^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug tree-optimization/53693] [4.7 regression] ICE in vect_get_vec_def_for_stmt_copy, at tree-vect-stmts.c:1438
2012-06-16 2:01 [Bug c++/53693] New: [4.7 regression] ICE in vect_get_vec_def_for_stmt_copy, at tree-vect-stmts.c:1438 bearoso at gmail dot com
` (5 preceding siblings ...)
2012-06-18 14:11 ` [Bug tree-optimization/53693] [4.7 " rguenth at gcc dot gnu.org
@ 2012-07-06 9:21 ` rguenth at gcc dot gnu.org
2012-07-06 9:26 ` rguenth at gcc dot gnu.org
7 siblings, 0 replies; 9+ messages in thread
From: rguenth at gcc dot gnu.org @ 2012-07-06 9:21 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53693
--- Comment #7 from Richard Guenther <rguenth at gcc dot gnu.org> 2012-07-06 09:21:39 UTC ---
Author: rguenth
Date: Fri Jul 6 09:21:36 2012
New Revision: 189313
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=189313
Log:
2012-07-06 Richard Guenther <rguenther@suse.de>
Backport from mainline
2012-06-18 Richard Guenther <rguenther@suse.de>
PR tree-optimization/53693
* tree-vect-patterns.c (vect_operation_fits_smaller_type):
Reject operands with more than one use.
* g++.dg/torture/pr53693.C: New testcase.
Added:
branches/gcc-4_7-branch/gcc/testsuite/g++.dg/torture/pr53693.C
Modified:
branches/gcc-4_7-branch/gcc/ChangeLog
branches/gcc-4_7-branch/gcc/testsuite/ChangeLog
branches/gcc-4_7-branch/gcc/tree-vect-patterns.c
^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug tree-optimization/53693] [4.7 regression] ICE in vect_get_vec_def_for_stmt_copy, at tree-vect-stmts.c:1438
2012-06-16 2:01 [Bug c++/53693] New: [4.7 regression] ICE in vect_get_vec_def_for_stmt_copy, at tree-vect-stmts.c:1438 bearoso at gmail dot com
` (6 preceding siblings ...)
2012-07-06 9:21 ` rguenth at gcc dot gnu.org
@ 2012-07-06 9:26 ` rguenth at gcc dot gnu.org
7 siblings, 0 replies; 9+ messages in thread
From: rguenth at gcc dot gnu.org @ 2012-07-06 9:26 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53693
Richard Guenther <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution| |FIXED
--- Comment #8 from Richard Guenther <rguenth at gcc dot gnu.org> 2012-07-06 09:26:10 UTC ---
Fixed.
^ permalink raw reply [flat|nested] 9+ messages in thread
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2012-06-16 2:01 [Bug c++/53693] New: [4.7 regression] ICE in vect_get_vec_def_for_stmt_copy, at tree-vect-stmts.c:1438 bearoso at gmail dot com
2012-06-16 15:01 ` [Bug tree-optimization/53693] [4.7/4.8 " hjl.tools at gmail dot com
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