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* [Bug middle-end/44505] New: [4.6 Regression] gcc.c-torture/execute/frame-address.c
@ 2010-06-11 20:49 hjl dot tools at gmail dot com
2010-06-11 21:36 ` [Bug middle-end/44505] " hjl dot tools at gmail dot com
` (9 more replies)
0 siblings, 10 replies; 11+ messages in thread
From: hjl dot tools at gmail dot com @ 2010-06-11 20:49 UTC (permalink / raw)
To: gcc-bugs
On Linux/ia32, revision 160623 gave:
FAIL: gcc.c-torture/execute/frame-address.c execution, -O2
FAIL: gcc.c-torture/execute/frame-address.c execution, -O3 -g
FAIL: gcc.c-torture/execute/frame-address.c execution, -Os
FAIL: gcc.c-torture/execute/frame-address.c execution, -O2 -flto
FAIL: gcc.c-torture/execute/frame-address.c execution, -O2 -fwhopr
Revision 160612 is OK.
--
Summary: [4.6 Regression] gcc.c-torture/execute/frame-address.c
Product: gcc
Version: 4.6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: middle-end
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: hjl dot tools at gmail dot com
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44505
^ permalink raw reply [flat|nested] 11+ messages in thread
* [Bug middle-end/44505] [4.6 Regression] gcc.c-torture/execute/frame-address.c
2010-06-11 20:49 [Bug middle-end/44505] New: [4.6 Regression] gcc.c-torture/execute/frame-address.c hjl dot tools at gmail dot com
@ 2010-06-11 21:36 ` hjl dot tools at gmail dot com
2010-06-11 21:37 ` hjl dot tools at gmail dot com
` (8 subsequent siblings)
9 siblings, 0 replies; 11+ messages in thread
From: hjl dot tools at gmail dot com @ 2010-06-11 21:36 UTC (permalink / raw)
To: gcc-bugs
------- Comment #1 from hjl dot tools at gmail dot com 2010-06-11 21:36 -------
It is caused by revision 160615:
http://gcc.gnu.org/ml/gcc-cvs/2010-06/msg00530.html
--
hjl dot tools at gmail dot com changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |hubicka at gcc dot gnu dot
| |org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44505
^ permalink raw reply [flat|nested] 11+ messages in thread
* [Bug middle-end/44505] [4.6 Regression] gcc.c-torture/execute/frame-address.c
2010-06-11 20:49 [Bug middle-end/44505] New: [4.6 Regression] gcc.c-torture/execute/frame-address.c hjl dot tools at gmail dot com
2010-06-11 21:36 ` [Bug middle-end/44505] " hjl dot tools at gmail dot com
@ 2010-06-11 21:37 ` hjl dot tools at gmail dot com
2010-06-13 9:53 ` dominiq at lps dot ens dot fr
` (7 subsequent siblings)
9 siblings, 0 replies; 11+ messages in thread
From: hjl dot tools at gmail dot com @ 2010-06-11 21:37 UTC (permalink / raw)
To: gcc-bugs
--
hjl dot tools at gmail dot com changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |4.6.0
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44505
^ permalink raw reply [flat|nested] 11+ messages in thread
* [Bug middle-end/44505] [4.6 Regression] gcc.c-torture/execute/frame-address.c
2010-06-11 20:49 [Bug middle-end/44505] New: [4.6 Regression] gcc.c-torture/execute/frame-address.c hjl dot tools at gmail dot com
2010-06-11 21:36 ` [Bug middle-end/44505] " hjl dot tools at gmail dot com
2010-06-11 21:37 ` hjl dot tools at gmail dot com
@ 2010-06-13 9:53 ` dominiq at lps dot ens dot fr
2010-06-16 6:00 ` amodra at gmail dot com
` (6 subsequent siblings)
9 siblings, 0 replies; 11+ messages in thread
From: dominiq at lps dot ens dot fr @ 2010-06-13 9:53 UTC (permalink / raw)
To: gcc-bugs
------- Comment #2 from dominiq at lps dot ens dot fr 2010-06-13 09:52 -------
Confirmed on x86_64-apple-darwin10.3.0.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44505
^ permalink raw reply [flat|nested] 11+ messages in thread
* [Bug middle-end/44505] [4.6 Regression] gcc.c-torture/execute/frame-address.c
2010-06-11 20:49 [Bug middle-end/44505] New: [4.6 Regression] gcc.c-torture/execute/frame-address.c hjl dot tools at gmail dot com
` (2 preceding siblings ...)
2010-06-13 9:53 ` dominiq at lps dot ens dot fr
@ 2010-06-16 6:00 ` amodra at gmail dot com
2010-06-16 16:14 ` hubicka at ucw dot cz
` (5 subsequent siblings)
9 siblings, 0 replies; 11+ messages in thread
From: amodra at gmail dot com @ 2010-06-16 6:00 UTC (permalink / raw)
To: gcc-bugs
------- Comment #3 from amodra at gmail dot com 2010-06-16 05:59 -------
Confirmed on powerpc-linux. check_fa tail calls check_fa_mid, ignoring the
fact that check_fa_mid is passed the address of a check_fa local var.
10000510 <check_fa>:
10000510: 94 21 ff e0 stwu r1,-32(r1)
10000514: 38 61 00 08 addi r3,r1,8
10000518: 38 21 00 20 addi r1,r1,32
1000051c: 4b ff ff b4 b 100004d0 <check_fa_mid>
--
amodra at gmail dot com changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Ever Confirmed|0 |1
Last reconfirmed|0000-00-00 00:00:00 |2010-06-16 05:59:52
date| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44505
^ permalink raw reply [flat|nested] 11+ messages in thread
* [Bug middle-end/44505] [4.6 Regression] gcc.c-torture/execute/frame-address.c
2010-06-11 20:49 [Bug middle-end/44505] New: [4.6 Regression] gcc.c-torture/execute/frame-address.c hjl dot tools at gmail dot com
` (3 preceding siblings ...)
2010-06-16 6:00 ` amodra at gmail dot com
@ 2010-06-16 16:14 ` hubicka at ucw dot cz
2010-06-16 16:15 ` hubicka at gcc dot gnu dot org
` (4 subsequent siblings)
9 siblings, 0 replies; 11+ messages in thread
From: hubicka at ucw dot cz @ 2010-06-16 16:14 UTC (permalink / raw)
To: gcc-bugs
------- Comment #4 from hubicka at ucw dot cz 2010-06-16 16:13 -------
Subject: Re: [4.6 Regression]
gcc.c-torture/execute/frame-address.c
> Confirmed on powerpc-linux. check_fa tail calls check_fa_mid, ignoring the
> fact that check_fa_mid is passed the address of a check_fa local var.
This seems like valid transform to me. check_fa_mid is recognized as const so
caller know that even if local variable is passed, it is not going to read it.
So i would say that the testcase is semi-invalid at least.
What about adding a asm statement clobbering memory to check_fa_work
to avoid the failure?
On the other hand I was worng to assume that built_in_frame_address does not
make function not-const or pure since it returns address of local frame
that is useless after returning from function. With parameter greater than
0 it is not true.
I wonder if we care enough about builtin_eh_frame to make it worthwhile to
special case this in ipa-pure-const? It does not 100% fit into the framework
since the calling statement is available only to non-WPA compilation.
Honza
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44505
^ permalink raw reply [flat|nested] 11+ messages in thread
* [Bug middle-end/44505] [4.6 Regression] gcc.c-torture/execute/frame-address.c
2010-06-11 20:49 [Bug middle-end/44505] New: [4.6 Regression] gcc.c-torture/execute/frame-address.c hjl dot tools at gmail dot com
` (4 preceding siblings ...)
2010-06-16 16:14 ` hubicka at ucw dot cz
@ 2010-06-16 16:15 ` hubicka at gcc dot gnu dot org
2010-06-17 4:13 ` amodra at gmail dot com
` (3 subsequent siblings)
9 siblings, 0 replies; 11+ messages in thread
From: hubicka at gcc dot gnu dot org @ 2010-06-16 16:15 UTC (permalink / raw)
To: gcc-bugs
------- Comment #5 from hubicka at gcc dot gnu dot org 2010-06-16 16:14 -------
mine.
--
hubicka at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
AssignedTo|unassigned at gcc dot gnu |hubicka at gcc dot gnu dot
|dot org |org
Status|NEW |ASSIGNED
Last reconfirmed|2010-06-16 05:59:52 |2010-06-16 16:14:34
date| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44505
^ permalink raw reply [flat|nested] 11+ messages in thread
* [Bug middle-end/44505] [4.6 Regression] gcc.c-torture/execute/frame-address.c
2010-06-11 20:49 [Bug middle-end/44505] New: [4.6 Regression] gcc.c-torture/execute/frame-address.c hjl dot tools at gmail dot com
` (5 preceding siblings ...)
2010-06-16 16:15 ` hubicka at gcc dot gnu dot org
@ 2010-06-17 4:13 ` amodra at gmail dot com
2010-06-17 6:42 ` hubicka at ucw dot cz
` (2 subsequent siblings)
9 siblings, 0 replies; 11+ messages in thread
From: amodra at gmail dot com @ 2010-06-17 4:13 UTC (permalink / raw)
To: gcc-bugs
------- Comment #6 from amodra at gmail dot com 2010-06-17 04:13 -------
Hmm. Well, perhaps the thing to do is ensure we don't get a tail call by
making the same change as in
http://gcc.gnu.org/ml/gcc-patches/2005-08/msg01726.html
Index: gcc/testsuite/gcc.c-torture/execute/frame-address.c
===================================================================
--- gcc/testsuite/gcc.c-torture/execute/frame-address.c (revision 160820)
+++ gcc/testsuite/gcc.c-torture/execute/frame-address.c (working copy)
@@ -25,7 +25,7 @@ int check_fa (char *unused)
{
const char c = 0;
- return check_fa_mid (&c);
+ return check_fa_mid (&c) != 0;
}
int how_much (void)
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44505
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* [Bug middle-end/44505] [4.6 Regression] gcc.c-torture/execute/frame-address.c
2010-06-11 20:49 [Bug middle-end/44505] New: [4.6 Regression] gcc.c-torture/execute/frame-address.c hjl dot tools at gmail dot com
` (6 preceding siblings ...)
2010-06-17 4:13 ` amodra at gmail dot com
@ 2010-06-17 6:42 ` hubicka at ucw dot cz
2010-06-21 18:08 ` uros at gcc dot gnu dot org
2010-06-22 11:43 ` [Bug testsuite/44505] " ubizjak at gmail dot com
9 siblings, 0 replies; 11+ messages in thread
From: hubicka at ucw dot cz @ 2010-06-17 6:42 UTC (permalink / raw)
To: gcc-bugs
------- Comment #7 from hubicka at ucw dot cz 2010-06-17 06:41 -------
Subject: Re: [4.6 Regression]
gcc.c-torture/execute/frame-address.c
> Hmm. Well, perhaps the thing to do is ensure we don't get a tail call by
> making the same change as in
> http://gcc.gnu.org/ml/gcc-patches/2005-08/msg01726.html
This seems fine with me ;)
Honza
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44505
^ permalink raw reply [flat|nested] 11+ messages in thread
* [Bug middle-end/44505] [4.6 Regression] gcc.c-torture/execute/frame-address.c
2010-06-11 20:49 [Bug middle-end/44505] New: [4.6 Regression] gcc.c-torture/execute/frame-address.c hjl dot tools at gmail dot com
` (7 preceding siblings ...)
2010-06-17 6:42 ` hubicka at ucw dot cz
@ 2010-06-21 18:08 ` uros at gcc dot gnu dot org
2010-06-22 11:43 ` [Bug testsuite/44505] " ubizjak at gmail dot com
9 siblings, 0 replies; 11+ messages in thread
From: uros at gcc dot gnu dot org @ 2010-06-21 18:08 UTC (permalink / raw)
To: gcc-bugs
------- Comment #8 from uros at gcc dot gnu dot org 2010-06-21 18:08 -------
Subject: Bug 44505
Author: uros
Date: Mon Jun 21 18:07:59 2010
New Revision: 161105
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=161105
Log:
PR testsuite/44505
* gcc.c-torture/execute/frame-address.c (check_fa): Avoid
tail call to check_fa_mid.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.c-torture/execute/frame-address.c
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44505
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* [Bug testsuite/44505] [4.6 Regression] gcc.c-torture/execute/frame-address.c
2010-06-11 20:49 [Bug middle-end/44505] New: [4.6 Regression] gcc.c-torture/execute/frame-address.c hjl dot tools at gmail dot com
` (8 preceding siblings ...)
2010-06-21 18:08 ` uros at gcc dot gnu dot org
@ 2010-06-22 11:43 ` ubizjak at gmail dot com
9 siblings, 0 replies; 11+ messages in thread
From: ubizjak at gmail dot com @ 2010-06-22 11:43 UTC (permalink / raw)
To: gcc-bugs
------- Comment #9 from ubizjak at gmail dot com 2010-06-22 11:43 -------
Fixed.
--
ubizjak at gmail dot com changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Component|middle-end |testsuite
GCC target triplet| |4.6.0
Resolution| |FIXED
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44505
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2010-06-11 20:49 [Bug middle-end/44505] New: [4.6 Regression] gcc.c-torture/execute/frame-address.c hjl dot tools at gmail dot com
2010-06-11 21:36 ` [Bug middle-end/44505] " hjl dot tools at gmail dot com
2010-06-11 21:37 ` hjl dot tools at gmail dot com
2010-06-13 9:53 ` dominiq at lps dot ens dot fr
2010-06-16 6:00 ` amodra at gmail dot com
2010-06-16 16:14 ` hubicka at ucw dot cz
2010-06-16 16:15 ` hubicka at gcc dot gnu dot org
2010-06-17 4:13 ` amodra at gmail dot com
2010-06-17 6:42 ` hubicka at ucw dot cz
2010-06-21 18:08 ` uros at gcc dot gnu dot org
2010-06-22 11:43 ` [Bug testsuite/44505] " ubizjak at gmail dot com
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