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* [Bug tree-optimization/51799] New: Compiler ICE in vect_is_simple_use_1
@ 2012-01-09 17:17 mgretton at sourceware dot org
2012-01-10 10:07 ` [Bug tree-optimization/51799] " rguenth at gcc dot gnu.org
` (6 more replies)
0 siblings, 7 replies; 8+ messages in thread
From: mgretton at sourceware dot org @ 2012-01-09 17:17 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51799
Bug #: 51799
Summary: Compiler ICE in vect_is_simple_use_1
Classification: Unclassified
Product: gcc
Version: 4.7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
AssignedTo: unassigned@gcc.gnu.org
ReportedBy: mgretton@sourceware.org
Target: arm-*-*
Created attachment 26281
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=26281
Failing test case.
The attached test case causes the compiler to ICE as follows:
$ arm-none-eabi-gcc -O1 -ftree-vectorize -mcpu=cortex-a9 \
-mfpu=neon -mfloat-abi=softfp ice.c
ice.c: In function 'f0a':
ice.c:7:1: internal compiler error: in vect_is_simple_use_1, at
tree-vect-stmts.c:5987
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
Checked against trunk revision 183018.
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug tree-optimization/51799] Compiler ICE in vect_is_simple_use_1
2012-01-09 17:17 [Bug tree-optimization/51799] New: Compiler ICE in vect_is_simple_use_1 mgretton at sourceware dot org
@ 2012-01-10 10:07 ` rguenth at gcc dot gnu.org
2012-01-10 13:28 ` [Bug tree-optimization/51799] [4.7 Regression] " mgretton at sourceware dot org
` (5 subsequent siblings)
6 siblings, 0 replies; 8+ messages in thread
From: rguenth at gcc dot gnu.org @ 2012-01-10 10:07 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51799
Richard Guenther <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |irar at gcc dot gnu.org
--- Comment #1 from Richard Guenther <rguenth at gcc dot gnu.org> 2012-01-10 10:07:13 UTC ---
Did it work with 4.6.x? If so, please mark it as regression.
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug tree-optimization/51799] [4.7 Regression] Compiler ICE in vect_is_simple_use_1
2012-01-09 17:17 [Bug tree-optimization/51799] New: Compiler ICE in vect_is_simple_use_1 mgretton at sourceware dot org
2012-01-10 10:07 ` [Bug tree-optimization/51799] " rguenth at gcc dot gnu.org
@ 2012-01-10 13:28 ` mgretton at sourceware dot org
2012-01-10 14:03 ` rguenth at gcc dot gnu.org
` (4 subsequent siblings)
6 siblings, 0 replies; 8+ messages in thread
From: mgretton at sourceware dot org @ 2012-01-10 13:28 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51799
Matthew Gretton-Dann <mgretton at sourceware dot org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to work| |4.6.2
Summary|Compiler ICE in |[4.7 Regression] Compiler
|vect_is_simple_use_1 |ICE in vect_is_simple_use_1
Known to fail| |4.7.0
--- Comment #2 from Matthew Gretton-Dann <mgretton at sourceware dot org> 2012-01-10 13:27:39 UTC ---
Doesn't ICE with GCC 4.6.2.
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug tree-optimization/51799] [4.7 Regression] Compiler ICE in vect_is_simple_use_1
2012-01-09 17:17 [Bug tree-optimization/51799] New: Compiler ICE in vect_is_simple_use_1 mgretton at sourceware dot org
2012-01-10 10:07 ` [Bug tree-optimization/51799] " rguenth at gcc dot gnu.org
2012-01-10 13:28 ` [Bug tree-optimization/51799] [4.7 Regression] " mgretton at sourceware dot org
@ 2012-01-10 14:03 ` rguenth at gcc dot gnu.org
2012-01-11 12:15 ` ramana at gcc dot gnu.org
` (3 subsequent siblings)
6 siblings, 0 replies; 8+ messages in thread
From: rguenth at gcc dot gnu.org @ 2012-01-10 14:03 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51799
Richard Guenther <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |4.7.0
--- Comment #3 from Richard Guenther <rguenth at gcc dot gnu.org> 2012-01-10 14:03:21 UTC ---
Thanks for checking.
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug tree-optimization/51799] [4.7 Regression] Compiler ICE in vect_is_simple_use_1
2012-01-09 17:17 [Bug tree-optimization/51799] New: Compiler ICE in vect_is_simple_use_1 mgretton at sourceware dot org
` (2 preceding siblings ...)
2012-01-10 14:03 ` rguenth at gcc dot gnu.org
@ 2012-01-11 12:15 ` ramana at gcc dot gnu.org
2012-01-12 10:49 ` irar at il dot ibm.com
` (2 subsequent siblings)
6 siblings, 0 replies; 8+ messages in thread
From: ramana at gcc dot gnu.org @ 2012-01-11 12:15 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51799
Ramana Radhakrishnan <ramana at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |ice-on-valid-code
Status|UNCONFIRMED |NEW
Last reconfirmed| |2012-01-11
CC| |ramana at gcc dot gnu.org
Ever Confirmed|0 |1
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug tree-optimization/51799] [4.7 Regression] Compiler ICE in vect_is_simple_use_1
2012-01-09 17:17 [Bug tree-optimization/51799] New: Compiler ICE in vect_is_simple_use_1 mgretton at sourceware dot org
` (3 preceding siblings ...)
2012-01-11 12:15 ` ramana at gcc dot gnu.org
@ 2012-01-12 10:49 ` irar at il dot ibm.com
2012-01-12 14:42 ` irar at gcc dot gnu.org
2012-01-12 16:50 ` jakub at gcc dot gnu.org
6 siblings, 0 replies; 8+ messages in thread
From: irar at il dot ibm.com @ 2012-01-12 10:49 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51799
Ira Rosen <irar at il dot ibm.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
CC| |irar at il dot ibm.com
AssignedTo|unassigned at gcc dot |irar at gcc dot gnu.org
|gnu.org |
--- Comment #4 from Ira Rosen <irar at il dot ibm.com> 2012-01-12 10:48:11 UTC ---
This is actually the same problem as in pr 51301, and the fix of 51301 looks
incomplete: we want an over-promoted sequence to end with type demotion
operation, so we need to check that properly:
Index: tree-vect-patterns.c
===================================================================
--- tree-vect-patterns.c (revision 182840)
+++ tree-vect-patterns.c (working copy)
@@ -1186,13 +1186,15 @@
{
use_lhs = gimple_assign_lhs (use_stmt);
use_type = TREE_TYPE (use_lhs);
- /* Support only type promotion or signedess change. Check that USE_TYPE
- is not bigger than the original type. */
+ /* Support only type demotion or signedess change. */
if (!INTEGRAL_TYPE_P (use_type)
- || TYPE_PRECISION (new_type) > TYPE_PRECISION (use_type)
- || TYPE_PRECISION (type) < TYPE_PRECISION (use_type))
+ || TYPE_PRECISION (type) <= TYPE_PRECISION (use_type))
return NULL;
+ /* Check that NEW_TYPE is not bigger than the conversion result. */
+ if (TYPE_PRECISION (new_type) > TYPE_PRECISION (use_type))
+ return NULL;
+
if (TYPE_UNSIGNED (new_type) != TYPE_UNSIGNED (use_type)
|| TYPE_PRECISION (new_type) != TYPE_PRECISION (use_type))
{
I am going to test this patch.
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug tree-optimization/51799] [4.7 Regression] Compiler ICE in vect_is_simple_use_1
2012-01-09 17:17 [Bug tree-optimization/51799] New: Compiler ICE in vect_is_simple_use_1 mgretton at sourceware dot org
` (4 preceding siblings ...)
2012-01-12 10:49 ` irar at il dot ibm.com
@ 2012-01-12 14:42 ` irar at gcc dot gnu.org
2012-01-12 16:50 ` jakub at gcc dot gnu.org
6 siblings, 0 replies; 8+ messages in thread
From: irar at gcc dot gnu.org @ 2012-01-12 14:42 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51799
--- Comment #5 from irar at gcc dot gnu.org 2012-01-12 14:41:51 UTC ---
Author: irar
Date: Thu Jan 12 14:41:44 2012
New Revision: 183126
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=183126
Log:
PR tree-optimization/51799
* tree-vect-patterns.c (vect_recog_over_widening_pattern): Check
that the last operation is a type demotion.
Added:
trunk/gcc/testsuite/gcc.dg/vect/pr51799.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.dg/vect/vect-widen-shift-u8.c
trunk/gcc/tree-vect-patterns.c
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug tree-optimization/51799] [4.7 Regression] Compiler ICE in vect_is_simple_use_1
2012-01-09 17:17 [Bug tree-optimization/51799] New: Compiler ICE in vect_is_simple_use_1 mgretton at sourceware dot org
` (5 preceding siblings ...)
2012-01-12 14:42 ` irar at gcc dot gnu.org
@ 2012-01-12 16:50 ` jakub at gcc dot gnu.org
6 siblings, 0 replies; 8+ messages in thread
From: jakub at gcc dot gnu.org @ 2012-01-12 16:50 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51799
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
CC| |jakub at gcc dot gnu.org
Resolution| |FIXED
--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> 2012-01-12 16:49:21 UTC ---
Fixed.
^ permalink raw reply [flat|nested] 8+ messages in thread
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2012-01-09 17:17 [Bug tree-optimization/51799] New: Compiler ICE in vect_is_simple_use_1 mgretton at sourceware dot org
2012-01-10 10:07 ` [Bug tree-optimization/51799] " rguenth at gcc dot gnu.org
2012-01-10 13:28 ` [Bug tree-optimization/51799] [4.7 Regression] " mgretton at sourceware dot org
2012-01-10 14:03 ` rguenth at gcc dot gnu.org
2012-01-11 12:15 ` ramana at gcc dot gnu.org
2012-01-12 10:49 ` irar at il dot ibm.com
2012-01-12 14:42 ` irar at gcc dot gnu.org
2012-01-12 16:50 ` jakub at gcc dot gnu.org
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