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* [Bug middle-end/50731] New: [4.7 Regression] FAIL: gcc.dg/torture/vector-shift2.c
@ 2011-10-14 16:42 hjl.tools at gmail dot com
2011-10-14 16:43 ` [Bug middle-end/50731] " hjl.tools at gmail dot com
` (7 more replies)
0 siblings, 8 replies; 9+ messages in thread
From: hjl.tools at gmail dot com @ 2011-10-14 16:42 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50731
Bug #: 50731
Summary: [4.7 Regression] FAIL: gcc.dg/torture/vector-shift2.c
Classification: Unclassified
Product: gcc
Version: 4.7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: middle-end
AssignedTo: unassigned@gcc.gnu.org
ReportedBy: hjl.tools@gmail.com
On Linux/x86, revision 179959 gave
FAIL: gcc.dg/torture/vector-shift2.c -O0 execution test
Revision 179912 is OK.
^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug middle-end/50731] [4.7 Regression] FAIL: gcc.dg/torture/vector-shift2.c
2011-10-14 16:42 [Bug middle-end/50731] New: [4.7 Regression] FAIL: gcc.dg/torture/vector-shift2.c hjl.tools at gmail dot com
@ 2011-10-14 16:43 ` hjl.tools at gmail dot com
2011-10-15 8:58 ` rguenth at gcc dot gnu.org
` (6 subsequent siblings)
7 siblings, 0 replies; 9+ messages in thread
From: hjl.tools at gmail dot com @ 2011-10-14 16:43 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50731
--- Comment #1 from H.J. Lu <hjl.tools at gmail dot com> 2011-10-14 16:42:37 UTC ---
Revision 179952 is OK.
^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug middle-end/50731] [4.7 Regression] FAIL: gcc.dg/torture/vector-shift2.c
2011-10-14 16:42 [Bug middle-end/50731] New: [4.7 Regression] FAIL: gcc.dg/torture/vector-shift2.c hjl.tools at gmail dot com
2011-10-14 16:43 ` [Bug middle-end/50731] " hjl.tools at gmail dot com
@ 2011-10-15 8:58 ` rguenth at gcc dot gnu.org
2011-10-17 17:26 ` ubizjak at gmail dot com
` (5 subsequent siblings)
7 siblings, 0 replies; 9+ messages in thread
From: rguenth at gcc dot gnu.org @ 2011-10-15 8:58 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50731
Richard Guenther <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2011-10-15
Target Milestone|--- |4.7.0
Ever Confirmed|0 |1
--- Comment #2 from Richard Guenther <rguenth at gcc dot gnu.org> 2011-10-15 08:58:20 UTC ---
Confirmed.
^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug middle-end/50731] [4.7 Regression] FAIL: gcc.dg/torture/vector-shift2.c
2011-10-14 16:42 [Bug middle-end/50731] New: [4.7 Regression] FAIL: gcc.dg/torture/vector-shift2.c hjl.tools at gmail dot com
2011-10-14 16:43 ` [Bug middle-end/50731] " hjl.tools at gmail dot com
2011-10-15 8:58 ` rguenth at gcc dot gnu.org
@ 2011-10-17 17:26 ` ubizjak at gmail dot com
2011-10-24 17:39 ` ubizjak at gmail dot com
` (4 subsequent siblings)
7 siblings, 0 replies; 9+ messages in thread
From: ubizjak at gmail dot com @ 2011-10-17 17:26 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50731
Uros Bizjak <ubizjak at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |rth at gcc dot gnu.org
--- Comment #3 from Uros Bizjak <ubizjak at gmail dot com> 2011-10-17 17:25:53 UTC ---
CC'd author of suspected commit.
^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug middle-end/50731] [4.7 Regression] FAIL: gcc.dg/torture/vector-shift2.c
2011-10-14 16:42 [Bug middle-end/50731] New: [4.7 Regression] FAIL: gcc.dg/torture/vector-shift2.c hjl.tools at gmail dot com
` (2 preceding siblings ...)
2011-10-17 17:26 ` ubizjak at gmail dot com
@ 2011-10-24 17:39 ` ubizjak at gmail dot com
2011-10-27 11:01 ` rguenth at gcc dot gnu.org
` (3 subsequent siblings)
7 siblings, 0 replies; 9+ messages in thread
From: ubizjak at gmail dot com @ 2011-10-24 17:39 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50731
--- Comment #4 from Uros Bizjak <ubizjak at gmail dot com> 2011-10-24 17:39:09 UTC ---
Revision 179958 FAILs.
^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug middle-end/50731] [4.7 Regression] FAIL: gcc.dg/torture/vector-shift2.c
2011-10-14 16:42 [Bug middle-end/50731] New: [4.7 Regression] FAIL: gcc.dg/torture/vector-shift2.c hjl.tools at gmail dot com
` (3 preceding siblings ...)
2011-10-24 17:39 ` ubizjak at gmail dot com
@ 2011-10-27 11:01 ` rguenth at gcc dot gnu.org
2011-10-27 11:39 ` rguenth at gcc dot gnu.org
` (2 subsequent siblings)
7 siblings, 0 replies; 9+ messages in thread
From: rguenth at gcc dot gnu.org @ 2011-10-27 11:01 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50731
Richard Guenther <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P1
Status|NEW |ASSIGNED
AssignedTo|unassigned at gcc dot |rguenth at gcc dot gnu.org
|gnu.org |
--- Comment #5 from Richard Guenther <rguenth at gcc dot gnu.org> 2011-10-27 11:00:49 UTC ---
I suppose it's just completely optimized away at -O1+ and thus broken
unconditionally. Shift lowering gives us
vuchar_1 = { 1, 2, 3, 4, 1, 2, 3, 4, 1, 2, 3, 4, 1, 2, 3, 4 };
vchar0_2 = { 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 };
vchar1_3 = { -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1
};
D.2720_7 = BIT_FIELD_REF <vchar1_3, 8, 0>;
D.2721_8 = D.2720_7 << 1;
D.2722_9 = BIT_FIELD_REF <vchar1_3, 8, 8>;
D.2723_10 = 1;
D.2724_11 = BIT_FIELD_REF <D.2723_10, 8, 8>;
and that last two lines already look completely bogus...
We are lowering from
vuchar_1 = { 1, 2, 3, 4, 1, 2, 3, 4, 1, 2, 3, 4, 1, 2, 3, 4 };
vchar0_2 = { 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 };
vchar1_3 = { -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1
};
i1.0_4 = vchar1_3 << 1;
i1 = i1.0_4;
D.2714_5 = BIT_FIELD_REF <i1, 8, 8>;
but the generic binary lowering and do_binop do not handle a scalar
RHS separately but do
static tree
do_binop (gimple_stmt_iterator *gsi, tree inner_type, tree a, tree b,
tree bitpos, tree bitsize, enum tree_code code)
{
a = tree_vec_extract (gsi, inner_type, a, bitsize, bitpos);
b = tree_vec_extract (gsi, inner_type, b, bitsize, bitpos);
return gimplify_build2 (gsi, code, inner_type, a, b);
that of course only works for element 0.
We came here via
gcc_assert (code != VEC_LSHIFT_EXPR && code != VEC_RSHIFT_EXPR);
new_rhs = expand_vector_operation (gsi, type, compute_type, stmt, code);
(gdb) p code
$6 = LSHIFT_EXPR
Fixing it in do_binop like
static tree
do_binop (gimple_stmt_iterator *gsi, tree inner_type, tree a, tree b,
tree bitpos, tree bitsize, enum tree_code code)
{
if (TREE_CODE (TREE_TYPE (a)) == VECTOR_TYPE)
a = tree_vec_extract (gsi, inner_type, a, bitsize, bitpos);
if (TREE_CODE (TREE_TYPE (b)) == VECTOR_TYPE)
b = tree_vec_extract (gsi, inner_type, b, bitsize, bitpos);
return gimplify_build2 (gsi, code, inner_type, a, b);
is easiest.
^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug middle-end/50731] [4.7 Regression] FAIL: gcc.dg/torture/vector-shift2.c
2011-10-14 16:42 [Bug middle-end/50731] New: [4.7 Regression] FAIL: gcc.dg/torture/vector-shift2.c hjl.tools at gmail dot com
` (4 preceding siblings ...)
2011-10-27 11:01 ` rguenth at gcc dot gnu.org
@ 2011-10-27 11:39 ` rguenth at gcc dot gnu.org
2011-10-27 12:13 ` rguenth at gcc dot gnu.org
2011-10-27 12:13 ` rguenth at gcc dot gnu.org
7 siblings, 0 replies; 9+ messages in thread
From: rguenth at gcc dot gnu.org @ 2011-10-27 11:39 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50731
Richard Guenther <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |dnovillo at gcc dot gnu.org
--- Comment #6 from Richard Guenther <rguenth at gcc dot gnu.org> 2011-10-27 11:38:48 UTC ---
*** Bug 50843 has been marked as a duplicate of this bug. ***
^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug middle-end/50731] [4.7 Regression] FAIL: gcc.dg/torture/vector-shift2.c
2011-10-14 16:42 [Bug middle-end/50731] New: [4.7 Regression] FAIL: gcc.dg/torture/vector-shift2.c hjl.tools at gmail dot com
` (6 preceding siblings ...)
2011-10-27 12:13 ` rguenth at gcc dot gnu.org
@ 2011-10-27 12:13 ` rguenth at gcc dot gnu.org
7 siblings, 0 replies; 9+ messages in thread
From: rguenth at gcc dot gnu.org @ 2011-10-27 12:13 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50731
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> 2011-10-27 12:11:57 UTC ---
Fixed.
^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug middle-end/50731] [4.7 Regression] FAIL: gcc.dg/torture/vector-shift2.c
2011-10-14 16:42 [Bug middle-end/50731] New: [4.7 Regression] FAIL: gcc.dg/torture/vector-shift2.c hjl.tools at gmail dot com
` (5 preceding siblings ...)
2011-10-27 11:39 ` rguenth at gcc dot gnu.org
@ 2011-10-27 12:13 ` rguenth at gcc dot gnu.org
2011-10-27 12:13 ` rguenth at gcc dot gnu.org
7 siblings, 0 replies; 9+ messages in thread
From: rguenth at gcc dot gnu.org @ 2011-10-27 12:13 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50731
--- Comment #7 from Richard Guenther <rguenth at gcc dot gnu.org> 2011-10-27 12:11:04 UTC ---
Author: rguenth
Date: Thu Oct 27 12:10:57 2011
New Revision: 180564
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=180564
Log:
2010-10-27 Richard Guenther <rguenther@suse.de>
PR middle-end/50731
* tree-vect-generic.c (do_binop): Handle scalar operands.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/tree-vect-generic.c
^ permalink raw reply [flat|nested] 9+ messages in thread
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2011-10-14 16:42 [Bug middle-end/50731] New: [4.7 Regression] FAIL: gcc.dg/torture/vector-shift2.c hjl.tools at gmail dot com
2011-10-14 16:43 ` [Bug middle-end/50731] " hjl.tools at gmail dot com
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