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* [Bug testsuite/37561] New: [4.4 Regression] Revision 140405 caused g++.old-deja/g++.mike/warn1.C
@ 2008-09-17 14:50 hjl dot tools at gmail dot com
2008-09-17 16:02 ` [Bug testsuite/37561] " janis at gcc dot gnu dot org
` (12 more replies)
0 siblings, 13 replies; 14+ messages in thread
From: hjl dot tools at gmail dot com @ 2008-09-17 14:50 UTC (permalink / raw)
To: gcc-bugs
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bash-3.2$ cat g++.old-deja/g++.mike/warn1.C
// { dg-do assemble }
// { dg-options "-Wall" }
typedef char * charptr;
typedef __SIZE_TYPE__ size_t;
char c[]={'A','B','C','D'};
int i=size_t(&c);
int *pp=&i;
void foo() { }
int main()
{
charptr(*pp)++; // { dg-warning "" }
return 0;
}
bash-3.2$ gcc -Wall -S -o /tmp/x.s g++.old-deja/g++.mike/warn1.C -m64
g++.old-deja/g++.mike/warn1.C: In function âint main()â:
g++.old-deja/g++.mike/warn1.C:12: warning: value computed is not used
bash-3.2$ gcc -Wall -S -o /tmp/x.s g++.old-deja/g++.mike/warn1.C -m32
g++.old-deja/g++.mike/warn1.C: In function âint main()â:
g++.old-deja/g++.mike/warn1.C:12: error: lvalue required as increment operand
bash-3.2$
On Linux/x86-64, I got
FAIL: g++.old-deja/g++.mike/warn1.C (test for errors, line 12)
FAIL: g++.old-deja/g++.mike/warn1.C (test for excess errors)
--
Summary: [4.4 Regression] Revision 140405 caused g++.old-
deja/g++.mike/warn1.C
Product: gcc
Version: 4.4.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: testsuite
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=37561
^ permalink raw reply [flat|nested] 14+ messages in thread
* [Bug testsuite/37561] [4.4 Regression] Revision 140405 caused g++.old-deja/g++.mike/warn1.C
2008-09-17 14:50 [Bug testsuite/37561] New: [4.4 Regression] Revision 140405 caused g++.old-deja/g++.mike/warn1.C hjl dot tools at gmail dot com
@ 2008-09-17 16:02 ` janis at gcc dot gnu dot org
2008-09-17 16:12 ` hjl dot tools at gmail dot com
` (11 subsequent siblings)
12 siblings, 0 replies; 14+ messages in thread
From: janis at gcc dot gnu dot org @ 2008-09-17 16:02 UTC (permalink / raw)
To: gcc-bugs
------- Comment #1 from janis at gcc dot gnu dot org 2008-09-17 16:00 -------
I tested with -m32 on powerpc64-linux, not with both -m32/-m64 which would have
caught this; I'll test with both for related patches.
The test previously used { dg-warning "" }, which matched any message from that
line. The patch, in preparation to using new versions of dg-error and
dg-warning that actually check for "warning" and "error", changed that to {
dg-error "lvalue" }, which matches the error message for -m32 but not the
warning message for -m64. It's a bug in the compiler that the error isn't
reported for -m64, and the change to the test merely detected that.
This should be a C++ bug, not a testsuite bug.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37561
^ permalink raw reply [flat|nested] 14+ messages in thread
* [Bug testsuite/37561] [4.4 Regression] Revision 140405 caused g++.old-deja/g++.mike/warn1.C
2008-09-17 14:50 [Bug testsuite/37561] New: [4.4 Regression] Revision 140405 caused g++.old-deja/g++.mike/warn1.C hjl dot tools at gmail dot com
2008-09-17 16:02 ` [Bug testsuite/37561] " janis at gcc dot gnu dot org
@ 2008-09-17 16:12 ` hjl dot tools at gmail dot com
2008-09-17 17:03 ` janis at gcc dot gnu dot org
` (10 subsequent siblings)
12 siblings, 0 replies; 14+ messages in thread
From: hjl dot tools at gmail dot com @ 2008-09-17 16:12 UTC (permalink / raw)
To: gcc-bugs
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------- Comment #2 from hjl dot tools at gmail dot com 2008-09-17 16:11 -------
(In reply to comment #1)
> I tested with -m32 on powerpc64-linux, not with both -m32/-m64 which would have
> caught this; I'll test with both for related patches.
>
> The test previously used { dg-warning "" }, which matched any message from that
> line. The patch, in preparation to using new versions of dg-error and
> dg-warning that actually check for "warning" and "error", changed that to {
> dg-error "lvalue" }, which matches the error message for -m32 but not the
> warning message for -m64. It's a bug in the compiler that the error isn't
> reported for -m64, and the change to the test merely detected that.
>
> This should be a C++ bug, not a testsuite bug.
>
I am not sure if it is a C++ bug. The differences between -m32
and -m64 are the sizes of __SIZE_TYPE__, int and pointer. Replace
int with long gives me
[hjl@gnu-6 tmp]$ cat x.cc
typedef char * charptr;
typedef __SIZE_TYPE__ size_t;
char c[]={'A','B','C','D'};
long i=size_t(&c);
long *pp=&i;
void foo() { }
int main()
{
charptr(*pp)++; // { dg-warning "" }
return 0;
}
[hjl@gnu-6 tmp]$ gcc -Wall x.cc -S -m64
x.cc: In function âint main()â:
x.cc:9: error: lvalue required as increment operand
[hjl@gnu-6 tmp]$ gcc -Wall x.cc -S -m32
x.cc: In function âint main()â:
x.cc:9: error: lvalue required as increment operand
[hjl@gnu-6 tmp]$
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37561
^ permalink raw reply [flat|nested] 14+ messages in thread
* [Bug testsuite/37561] [4.4 Regression] Revision 140405 caused g++.old-deja/g++.mike/warn1.C
2008-09-17 14:50 [Bug testsuite/37561] New: [4.4 Regression] Revision 140405 caused g++.old-deja/g++.mike/warn1.C hjl dot tools at gmail dot com
2008-09-17 16:02 ` [Bug testsuite/37561] " janis at gcc dot gnu dot org
2008-09-17 16:12 ` hjl dot tools at gmail dot com
@ 2008-09-17 17:03 ` janis at gcc dot gnu dot org
2008-09-17 17:39 ` janis at gcc dot gnu dot org
` (9 subsequent siblings)
12 siblings, 0 replies; 14+ messages in thread
From: janis at gcc dot gnu dot org @ 2008-09-17 17:03 UTC (permalink / raw)
To: gcc-bugs
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------- Comment #3 from janis at gcc dot gnu dot org 2008-09-17 17:02 -------
This is twisting my brain, but in this simplified testcase:
__PTRDIFF_TYPE__ p;
short q;
void foo () { ((char *)p)++; }
void bar () { ((char *)q)++; }
we get an error with both -m32 and-m64 for foo but not for bar:
elm3b149% /home/janis/tools/gcc-trunk-anonsvn/bin/g++ -c -m32 z.C
z.C: In function void foo():
z.C:3: error: lvalue required as increment operand
elm3b149% /home/janis/tools/gcc-trunk-anonsvn/bin/g++ -c -m64 z.C
z.C: In function void foo():
z.C:3: error: lvalue required as increment operand
although the expression "(char *)q" in bar is not an lvalue. What am I
missing?
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37561
^ permalink raw reply [flat|nested] 14+ messages in thread
* [Bug testsuite/37561] [4.4 Regression] Revision 140405 caused g++.old-deja/g++.mike/warn1.C
2008-09-17 14:50 [Bug testsuite/37561] New: [4.4 Regression] Revision 140405 caused g++.old-deja/g++.mike/warn1.C hjl dot tools at gmail dot com
` (2 preceding siblings ...)
2008-09-17 17:03 ` janis at gcc dot gnu dot org
@ 2008-09-17 17:39 ` janis at gcc dot gnu dot org
2008-09-19 18:26 ` janis at gcc dot gnu dot org
` (8 subsequent siblings)
12 siblings, 0 replies; 14+ messages in thread
From: janis at gcc dot gnu dot org @ 2008-09-17 17:39 UTC (permalink / raw)
To: gcc-bugs
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------- Comment #4 from janis at gcc dot gnu dot org 2008-09-17 17:38 -------
The same thing happens in C for the simplified testcase; z.c is a copy of z.C
from comment #3:
elm3b149% /home/janis/tools/gcc-trunk-anonsvn/bin/gcc -c -m32 z.c
z.c: In function foo:
z.c:3: error: lvalue required as increment operand
z.c: In function bar:
z.c:4: warning: cast to pointer from integer of different size
elm3b149% /home/janis/tools/gcc-trunk-anonsvn/bin/gcc -c -m64 z.c
z.c: In function foo:
z.c:3: error: lvalue required as increment operand
z.c: In function bar:
z.c:4: warning: cast to pointer from integer of different size
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37561
^ permalink raw reply [flat|nested] 14+ messages in thread
* [Bug testsuite/37561] [4.4 Regression] Revision 140405 caused g++.old-deja/g++.mike/warn1.C
2008-09-17 14:50 [Bug testsuite/37561] New: [4.4 Regression] Revision 140405 caused g++.old-deja/g++.mike/warn1.C hjl dot tools at gmail dot com
` (3 preceding siblings ...)
2008-09-17 17:39 ` janis at gcc dot gnu dot org
@ 2008-09-19 18:26 ` janis at gcc dot gnu dot org
2008-09-20 3:10 ` [Bug c++/37561] " pinskia at gcc dot gnu dot org
` (7 subsequent siblings)
12 siblings, 0 replies; 14+ messages in thread
From: janis at gcc dot gnu dot org @ 2008-09-19 18:26 UTC (permalink / raw)
To: gcc-bugs
------- Comment #5 from janis at gcc dot gnu dot org 2008-09-19 18:24 -------
The operand of a postincrement and friends must be a modifiable lvalue. The
type check code for both C and C++ calls get_unwidened, which removes the cast
when it's a different size but leaves the cast when it's the same size. The
later call to lvalue_p (via lvalue_or_else) says the operand is not an lvalue
when there's still a cast, but doesn't complain when the cast has been removed.
--
janis at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |mmitchel at gcc dot gnu dot
| |org, jsm28 at gcc dot gnu
| |dot org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37561
^ permalink raw reply [flat|nested] 14+ messages in thread
* [Bug c++/37561] [4.4 Regression] Revision 140405 caused g++.old-deja/g++.mike/warn1.C
2008-09-17 14:50 [Bug testsuite/37561] New: [4.4 Regression] Revision 140405 caused g++.old-deja/g++.mike/warn1.C hjl dot tools at gmail dot com
` (4 preceding siblings ...)
2008-09-19 18:26 ` janis at gcc dot gnu dot org
@ 2008-09-20 3:10 ` pinskia at gcc dot gnu dot org
2008-10-07 14:10 ` [Bug c++/37561] [4.2/4.3/4.4 " jakub at gcc dot gnu dot org
` (6 subsequent siblings)
12 siblings, 0 replies; 14+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2008-09-20 3:10 UTC (permalink / raw)
To: gcc-bugs
------- Comment #6 from pinskia at gcc dot gnu dot org 2008-09-20 03:09 -------
This is a bug in the front-end ...
--
pinskia at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |pinskia at gcc dot gnu dot
| |org
Status|UNCONFIRMED |NEW
Component|testsuite |c++
Ever Confirmed|0 |1
Keywords| |accepts-invalid
Last reconfirmed|0000-00-00 00:00:00 |2008-09-20 03:09:18
date| |
Target Milestone|--- |4.4.0
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37561
^ permalink raw reply [flat|nested] 14+ messages in thread
* [Bug c++/37561] [4.2/4.3/4.4 Regression] Revision 140405 caused g++.old-deja/g++.mike/warn1.C
2008-09-17 14:50 [Bug testsuite/37561] New: [4.4 Regression] Revision 140405 caused g++.old-deja/g++.mike/warn1.C hjl dot tools at gmail dot com
` (5 preceding siblings ...)
2008-09-20 3:10 ` [Bug c++/37561] " pinskia at gcc dot gnu dot org
@ 2008-10-07 14:10 ` jakub at gcc dot gnu dot org
2008-10-22 3:21 ` mmitchel at gcc dot gnu dot org
` (5 subsequent siblings)
12 siblings, 0 replies; 14+ messages in thread
From: jakub at gcc dot gnu dot org @ 2008-10-07 14:10 UTC (permalink / raw)
To: gcc-bugs
------- Comment #7 from jakub at gcc dot gnu dot org 2008-10-07 14:08 -------
As all compilers starting with 4.0 behave the same way, this is not a new 4.4
regression.
--
jakub at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|[4.4 Regression] Revision |[4.2/4.3/4.4 Regression]
|140405 caused g++.old- |Revision 140405 caused
|deja/g++.mike/warn1.C |g++.old-
| |deja/g++.mike/warn1.C
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37561
^ permalink raw reply [flat|nested] 14+ messages in thread
* [Bug c++/37561] [4.2/4.3/4.4 Regression] Revision 140405 caused g++.old-deja/g++.mike/warn1.C
2008-09-17 14:50 [Bug testsuite/37561] New: [4.4 Regression] Revision 140405 caused g++.old-deja/g++.mike/warn1.C hjl dot tools at gmail dot com
` (6 preceding siblings ...)
2008-10-07 14:10 ` [Bug c++/37561] [4.2/4.3/4.4 " jakub at gcc dot gnu dot org
@ 2008-10-22 3:21 ` mmitchel at gcc dot gnu dot org
2008-11-14 16:12 ` jakub at gcc dot gnu dot org
` (4 subsequent siblings)
12 siblings, 0 replies; 14+ messages in thread
From: mmitchel at gcc dot gnu dot org @ 2008-10-22 3:21 UTC (permalink / raw)
To: gcc-bugs
--
mmitchel at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P2
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37561
^ permalink raw reply [flat|nested] 14+ messages in thread
* [Bug c++/37561] [4.2/4.3/4.4 Regression] Revision 140405 caused g++.old-deja/g++.mike/warn1.C
2008-09-17 14:50 [Bug testsuite/37561] New: [4.4 Regression] Revision 140405 caused g++.old-deja/g++.mike/warn1.C hjl dot tools at gmail dot com
` (7 preceding siblings ...)
2008-10-22 3:21 ` mmitchel at gcc dot gnu dot org
@ 2008-11-14 16:12 ` jakub at gcc dot gnu dot org
2008-11-15 9:55 ` jakub at gcc dot gnu dot org
` (3 subsequent siblings)
12 siblings, 0 replies; 14+ messages in thread
From: jakub at gcc dot gnu dot org @ 2008-11-14 16:12 UTC (permalink / raw)
To: gcc-bugs
--
jakub at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
AssignedTo|unassigned at gcc dot gnu |jakub at gcc dot gnu dot org
|dot org |
Status|NEW |ASSIGNED
Last reconfirmed|2008-09-20 03:09:18 |2008-11-14 16:10:30
date| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37561
^ permalink raw reply [flat|nested] 14+ messages in thread
* [Bug c++/37561] [4.2/4.3/4.4 Regression] Revision 140405 caused g++.old-deja/g++.mike/warn1.C
2008-09-17 14:50 [Bug testsuite/37561] New: [4.4 Regression] Revision 140405 caused g++.old-deja/g++.mike/warn1.C hjl dot tools at gmail dot com
` (8 preceding siblings ...)
2008-11-14 16:12 ` jakub at gcc dot gnu dot org
@ 2008-11-15 9:55 ` jakub at gcc dot gnu dot org
2008-11-15 9:58 ` [Bug c++/37561] [4.2/4.3 " jakub at gcc dot gnu dot org
` (2 subsequent siblings)
12 siblings, 0 replies; 14+ messages in thread
From: jakub at gcc dot gnu dot org @ 2008-11-15 9:55 UTC (permalink / raw)
To: gcc-bugs
------- Comment #8 from jakub at gcc dot gnu dot org 2008-11-15 09:54 -------
Subject: Bug 37561
Author: jakub
Date: Sat Nov 15 09:53:02 2008
New Revision: 141881
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=141881
Log:
PR c++/37561
* c-typeck.c (build_unary_op): Don't call get_unwidened. Use
argtype instead of result_type.
* typeck.c (cp_build_unary_op): Don't call get_unwidened. Use
argtype instead of result_type.
* gcc.dg/pr37561.c: New test.
* g++.dg/other/increment1.C: New test.
Added:
trunk/gcc/testsuite/g++.dg/other/increment1.C
trunk/gcc/testsuite/gcc.dg/pr37561.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/c-typeck.c
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/typeck.c
trunk/gcc/testsuite/ChangeLog
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37561
^ permalink raw reply [flat|nested] 14+ messages in thread
* [Bug c++/37561] [4.2/4.3 Regression] Revision 140405 caused g++.old-deja/g++.mike/warn1.C
2008-09-17 14:50 [Bug testsuite/37561] New: [4.4 Regression] Revision 140405 caused g++.old-deja/g++.mike/warn1.C hjl dot tools at gmail dot com
` (9 preceding siblings ...)
2008-11-15 9:55 ` jakub at gcc dot gnu dot org
@ 2008-11-15 9:58 ` jakub at gcc dot gnu dot org
2009-01-08 22:58 ` rguenth at gcc dot gnu dot org
2009-07-10 15:55 ` rguenth at gcc dot gnu dot org
12 siblings, 0 replies; 14+ messages in thread
From: jakub at gcc dot gnu dot org @ 2008-11-15 9:58 UTC (permalink / raw)
To: gcc-bugs
------- Comment #9 from jakub at gcc dot gnu dot org 2008-11-15 09:57 -------
Fixed on the trunk.
--
jakub at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to work| |4.4.0
Summary|[4.2/4.3/4.4 Regression] |[4.2/4.3 Regression]
|Revision 140405 caused |Revision 140405 caused
|g++.old- |g++.old-
|deja/g++.mike/warn1.C |deja/g++.mike/warn1.C
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37561
^ permalink raw reply [flat|nested] 14+ messages in thread
* [Bug c++/37561] [4.2/4.3 Regression] Revision 140405 caused g++.old-deja/g++.mike/warn1.C
2008-09-17 14:50 [Bug testsuite/37561] New: [4.4 Regression] Revision 140405 caused g++.old-deja/g++.mike/warn1.C hjl dot tools at gmail dot com
` (10 preceding siblings ...)
2008-11-15 9:58 ` [Bug c++/37561] [4.2/4.3 " jakub at gcc dot gnu dot org
@ 2009-01-08 22:58 ` rguenth at gcc dot gnu dot org
2009-07-10 15:55 ` rguenth at gcc dot gnu dot org
12 siblings, 0 replies; 14+ messages in thread
From: rguenth at gcc dot gnu dot org @ 2009-01-08 22:58 UTC (permalink / raw)
To: gcc-bugs
------- Comment #10 from rguenth at gcc dot gnu dot org 2009-01-08 22:58 -------
Thus fixed. No need to fix accepts-invalid bugs on release branches (IMHO
we should never do that).
--
rguenth at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Known to fail| |4.2.4 4.3.2
Resolution| |FIXED
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37561
^ permalink raw reply [flat|nested] 14+ messages in thread
* [Bug c++/37561] [4.2/4.3 Regression] Revision 140405 caused g++.old-deja/g++.mike/warn1.C
2008-09-17 14:50 [Bug testsuite/37561] New: [4.4 Regression] Revision 140405 caused g++.old-deja/g++.mike/warn1.C hjl dot tools at gmail dot com
` (11 preceding siblings ...)
2009-01-08 22:58 ` rguenth at gcc dot gnu dot org
@ 2009-07-10 15:55 ` rguenth at gcc dot gnu dot org
12 siblings, 0 replies; 14+ messages in thread
From: rguenth at gcc dot gnu dot org @ 2009-07-10 15:55 UTC (permalink / raw)
To: gcc-bugs
------- Comment #11 from rguenth at gcc dot gnu dot org 2009-07-10 15:55 -------
Subject: Bug 37561
Author: rguenth
Date: Fri Jul 10 15:55:04 2009
New Revision: 149484
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=149484
Log:
2009-07-10 Richard Guenther <rguenther@suse.de>
Backport from mainline
2008-11-17 Jakub Jelinek <jakub@redhat.com>
PR c++/36089
* init.c (constant_value_1): Handle TREE_LIST init.
PR c++/37561
PR c++/36089
* g++.dg/template/init8.C: New test.
Added:
branches/gcc-4_3-branch/gcc/testsuite/g++.dg/template/init8.C
Modified:
branches/gcc-4_3-branch/gcc/cp/ChangeLog
branches/gcc-4_3-branch/gcc/cp/init.c
branches/gcc-4_3-branch/gcc/testsuite/ChangeLog
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37561
^ permalink raw reply [flat|nested] 14+ messages in thread
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2008-09-17 14:50 [Bug testsuite/37561] New: [4.4 Regression] Revision 140405 caused g++.old-deja/g++.mike/warn1.C hjl dot tools at gmail dot com
2008-09-17 16:02 ` [Bug testsuite/37561] " janis at gcc dot gnu dot org
2008-09-17 16:12 ` hjl dot tools at gmail dot com
2008-09-17 17:03 ` janis at gcc dot gnu dot org
2008-09-17 17:39 ` janis at gcc dot gnu dot org
2008-09-19 18:26 ` janis at gcc dot gnu dot org
2008-09-20 3:10 ` [Bug c++/37561] " pinskia at gcc dot gnu dot org
2008-10-07 14:10 ` [Bug c++/37561] [4.2/4.3/4.4 " jakub at gcc dot gnu dot org
2008-10-22 3:21 ` mmitchel at gcc dot gnu dot org
2008-11-14 16:12 ` jakub at gcc dot gnu dot org
2008-11-15 9:55 ` jakub at gcc dot gnu dot org
2008-11-15 9:58 ` [Bug c++/37561] [4.2/4.3 " jakub at gcc dot gnu dot org
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