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* [Bug tree-optimization/42833] New: SRA miscompiles qemu
@ 2010-01-21 16:55 rth at gcc dot gnu dot org
2010-01-21 16:57 ` [Bug tree-optimization/42833] " rth at gcc dot gnu dot org
` (5 more replies)
0 siblings, 6 replies; 7+ messages in thread
From: rth at gcc dot gnu dot org @ 2010-01-21 16:55 UTC (permalink / raw)
To: gcc-bugs
The reduced test case compiles down to
xor %eax,%eax
ret
which comes from an invalid transformation in .030t.esra
conv_u.v = vdest;
res_115 = conv_u.i;
->
D.2888_153 = VIEW_CONVERT_EXPR<uint32_t>(vdest);
vdest.v1 = vdest$v1_154;
vdest.v2 = vdest$v2_152;
vdest.v3 = vdest$v3_151;
vdest.v4 = vdest$v4_150;
conv_u$i_171 = D.2888_153;
Note in particular that the components of vdest are stored after
we've done the view_convert.
--
Summary: SRA miscompiles qemu
Product: gcc
Version: 4.5.0
Status: UNCONFIRMED
Keywords: wrong-code
Severity: normal
Priority: P3
Component: tree-optimization
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: rth at gcc dot gnu dot org
GCC target triplet: x86_64-linux
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42833
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug tree-optimization/42833] SRA miscompiles qemu
2010-01-21 16:55 [Bug tree-optimization/42833] New: SRA miscompiles qemu rth at gcc dot gnu dot org
@ 2010-01-21 16:57 ` rth at gcc dot gnu dot org
2010-01-21 19:51 ` [Bug tree-optimization/42833] [4.5 Regression] sra " pinskia at gcc dot gnu dot org
` (4 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: rth at gcc dot gnu dot org @ 2010-01-21 16:57 UTC (permalink / raw)
To: gcc-bugs
------- Comment #1 from rth at gcc dot gnu dot org 2010-01-21 16:56 -------
Created an attachment (id=19683)
--> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=19683&action=view)
test case
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42833
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug tree-optimization/42833] [4.5 Regression] sra miscompiles qemu
2010-01-21 16:55 [Bug tree-optimization/42833] New: SRA miscompiles qemu rth at gcc dot gnu dot org
2010-01-21 16:57 ` [Bug tree-optimization/42833] " rth at gcc dot gnu dot org
@ 2010-01-21 19:51 ` pinskia at gcc dot gnu dot org
2010-01-21 20:29 ` rth at gcc dot gnu dot org
` (3 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2010-01-21 19:51 UTC (permalink / raw)
To: gcc-bugs
--
pinskia at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |pinskia at gcc dot gnu dot
| |org
Target Milestone|--- |4.5.0
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42833
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug tree-optimization/42833] [4.5 Regression] sra miscompiles qemu
2010-01-21 16:55 [Bug tree-optimization/42833] New: SRA miscompiles qemu rth at gcc dot gnu dot org
2010-01-21 16:57 ` [Bug tree-optimization/42833] " rth at gcc dot gnu dot org
2010-01-21 19:51 ` [Bug tree-optimization/42833] [4.5 Regression] sra " pinskia at gcc dot gnu dot org
@ 2010-01-21 20:29 ` rth at gcc dot gnu dot org
2010-01-21 20:29 ` rth at gcc dot gnu dot org
` (2 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: rth at gcc dot gnu dot org @ 2010-01-21 20:29 UTC (permalink / raw)
To: gcc-bugs
--
rth at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P1
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42833
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug tree-optimization/42833] [4.5 Regression] sra miscompiles qemu
2010-01-21 16:55 [Bug tree-optimization/42833] New: SRA miscompiles qemu rth at gcc dot gnu dot org
` (2 preceding siblings ...)
2010-01-21 20:29 ` rth at gcc dot gnu dot org
@ 2010-01-21 20:29 ` rth at gcc dot gnu dot org
2010-01-22 18:52 ` rth at gcc dot gnu dot org
2010-01-22 23:54 ` rguenth at gcc dot gnu dot org
5 siblings, 0 replies; 7+ messages in thread
From: rth at gcc dot gnu dot org @ 2010-01-21 20:29 UTC (permalink / raw)
To: gcc-bugs
--
rth at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
AssignedTo|unassigned at gcc dot gnu |rth at gcc dot gnu dot org
|dot org |
Status|UNCONFIRMED |ASSIGNED
Ever Confirmed|0 |1
Last reconfirmed|0000-00-00 00:00:00 |2010-01-21 20:29:09
date| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42833
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug tree-optimization/42833] [4.5 Regression] sra miscompiles qemu
2010-01-21 16:55 [Bug tree-optimization/42833] New: SRA miscompiles qemu rth at gcc dot gnu dot org
` (3 preceding siblings ...)
2010-01-21 20:29 ` rth at gcc dot gnu dot org
@ 2010-01-22 18:52 ` rth at gcc dot gnu dot org
2010-01-22 23:54 ` rguenth at gcc dot gnu dot org
5 siblings, 0 replies; 7+ messages in thread
From: rth at gcc dot gnu dot org @ 2010-01-22 18:52 UTC (permalink / raw)
To: gcc-bugs
------- Comment #2 from rth at gcc dot gnu dot org 2010-01-22 18:52 -------
Subject: Bug 42833
Author: rth
Date: Fri Jan 22 18:52:01 2010
New Revision: 156176
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=156176
Log:
PR tree-opt/42833
* tree-sra.c (sra_modify_assign): Delay re-gimplification of
the RHS until after generate_subtree_copies has insertted its
code before the current statement.
Added:
trunk/gcc/testsuite/gcc.c-torture/execute/pr42833.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/tree-sra.c
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42833
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug tree-optimization/42833] [4.5 Regression] sra miscompiles qemu
2010-01-21 16:55 [Bug tree-optimization/42833] New: SRA miscompiles qemu rth at gcc dot gnu dot org
` (4 preceding siblings ...)
2010-01-22 18:52 ` rth at gcc dot gnu dot org
@ 2010-01-22 23:54 ` rguenth at gcc dot gnu dot org
5 siblings, 0 replies; 7+ messages in thread
From: rguenth at gcc dot gnu dot org @ 2010-01-22 23:54 UTC (permalink / raw)
To: gcc-bugs
------- Comment #3 from rguenth at gcc dot gnu dot org 2010-01-22 23:54 -------
Fixed.
--
rguenth at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution| |FIXED
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42833
^ permalink raw reply [flat|nested] 7+ messages in thread
end of thread, other threads:[~2010-01-22 23:54 UTC | newest]
Thread overview: 7+ messages (download: mbox.gz / follow: Atom feed)
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2010-01-21 16:55 [Bug tree-optimization/42833] New: SRA miscompiles qemu rth at gcc dot gnu dot org
2010-01-21 16:57 ` [Bug tree-optimization/42833] " rth at gcc dot gnu dot org
2010-01-21 19:51 ` [Bug tree-optimization/42833] [4.5 Regression] sra " pinskia at gcc dot gnu dot org
2010-01-21 20:29 ` rth at gcc dot gnu dot org
2010-01-21 20:29 ` rth at gcc dot gnu dot org
2010-01-22 18:52 ` rth at gcc dot gnu dot org
2010-01-22 23:54 ` rguenth at gcc dot gnu dot org
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