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* [Bug tree-optimization/39974] [4.5 regression] Bogus "array subscript is below array bounds" warning in compiler generated code
2009-04-30 9:15 [Bug tree-optimization/39974] New: [4.5 regression] Bogus "array subscript is below array bounds" warning in compiler generated code reichelt at gcc dot gnu dot org
@ 2009-04-30 9:15 ` reichelt at gcc dot gnu dot org
2009-05-05 15:51 ` mmitchel at gcc dot gnu dot org
` (4 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: reichelt at gcc dot gnu dot org @ 2009-04-30 9:15 UTC (permalink / raw)
To: gcc-bugs
--
reichelt at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |4.5.0
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39974
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug tree-optimization/39974] New: [4.5 regression] Bogus "array subscript is below array bounds" warning in compiler generated code
@ 2009-04-30 9:15 reichelt at gcc dot gnu dot org
2009-04-30 9:15 ` [Bug tree-optimization/39974] " reichelt at gcc dot gnu dot org
` (5 more replies)
0 siblings, 6 replies; 7+ messages in thread
From: reichelt at gcc dot gnu dot org @ 2009-04-30 9:15 UTC (permalink / raw)
To: gcc-bugs
The following code snippet produces a bogus warning when compiled with
"-O2 -Wall" on trunk:
bug.cc: In function 'void
_Z41__static_initialization_and_destruction_0ii.clone.0()':
bug.cc:3: warning: array subscript is below array bounds
bug.cc:3: warning: array subscript is below array bounds
bug.cc:3: warning: array subscript is below array bounds
Maybe the warning indicates a code generation bug.
Interestingly, the second array must contain at least 42 elements ;-)
==================================================================
#include<string>
std::string x[2][3] = { { "", "", "" }, { "", "", "" } };
struct A
{
A(int);
};
struct B
{
A a1, a2, a3, a4, a5, a6;
};
B b[42] =
{
{ 0, 0, 0, 0, 0, 0 },
{ 0, 0, 0, 0, 0, 0 },
{ 0, 0, 0, 0, 0, 0 },
{ 0, 0, 0, 0, 0, 0 },
{ 0, 0, 0, 0, 0, 0 },
{ 0, 0, 0, 0, 0, 0 },
{ 0, 0, 0, 0, 0, 0 },
{ 0, 0, 0, 0, 0, 0 },
{ 0, 0, 0, 0, 0, 0 },
{ 0, 0, 0, 0, 0, 0 },
{ 0, 0, 0, 0, 0, 0 },
{ 0, 0, 0, 0, 0, 0 },
{ 0, 0, 0, 0, 0, 0 },
{ 0, 0, 0, 0, 0, 0 },
{ 0, 0, 0, 0, 0, 0 },
{ 0, 0, 0, 0, 0, 0 },
{ 0, 0, 0, 0, 0, 0 },
{ 0, 0, 0, 0, 0, 0 },
{ 0, 0, 0, 0, 0, 0 },
{ 0, 0, 0, 0, 0, 0 },
{ 0, 0, 0, 0, 0, 0 },
{ 0, 0, 0, 0, 0, 0 },
{ 0, 0, 0, 0, 0, 0 },
{ 0, 0, 0, 0, 0, 0 },
{ 0, 0, 0, 0, 0, 0 },
{ 0, 0, 0, 0, 0, 0 },
{ 0, 0, 0, 0, 0, 0 },
{ 0, 0, 0, 0, 0, 0 },
{ 0, 0, 0, 0, 0, 0 },
{ 0, 0, 0, 0, 0, 0 },
{ 0, 0, 0, 0, 0, 0 },
{ 0, 0, 0, 0, 0, 0 },
{ 0, 0, 0, 0, 0, 0 },
{ 0, 0, 0, 0, 0, 0 },
{ 0, 0, 0, 0, 0, 0 },
{ 0, 0, 0, 0, 0, 0 },
{ 0, 0, 0, 0, 0, 0 },
{ 0, 0, 0, 0, 0, 0 },
{ 0, 0, 0, 0, 0, 0 },
{ 0, 0, 0, 0, 0, 0 },
{ 0, 0, 0, 0, 0, 0 },
{ 0, 0, 0, 0, 0, 0 }
};
==================================================================
--
Summary: [4.5 regression] Bogus "array subscript is below array
bounds" warning in compiler generated code
Product: gcc
Version: 4.5.0
Status: UNCONFIRMED
Keywords: diagnostic
Severity: normal
Priority: P3
Component: tree-optimization
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: reichelt at gcc dot gnu dot org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39974
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug tree-optimization/39974] [4.5 regression] Bogus "array subscript is below array bounds" warning in compiler generated code
2009-04-30 9:15 [Bug tree-optimization/39974] New: [4.5 regression] Bogus "array subscript is below array bounds" warning in compiler generated code reichelt at gcc dot gnu dot org
2009-04-30 9:15 ` [Bug tree-optimization/39974] " reichelt at gcc dot gnu dot org
@ 2009-05-05 15:51 ` mmitchel at gcc dot gnu dot org
2009-05-05 22:00 ` reichelt at gcc dot gnu dot org
` (3 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: mmitchel at gcc dot gnu dot org @ 2009-05-05 15:51 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=39974
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug tree-optimization/39974] [4.5 regression] Bogus "array subscript is below array bounds" warning in compiler generated code
2009-04-30 9:15 [Bug tree-optimization/39974] New: [4.5 regression] Bogus "array subscript is below array bounds" warning in compiler generated code reichelt at gcc dot gnu dot org
2009-04-30 9:15 ` [Bug tree-optimization/39974] " reichelt at gcc dot gnu dot org
2009-05-05 15:51 ` mmitchel at gcc dot gnu dot org
@ 2009-05-05 22:00 ` reichelt at gcc dot gnu dot org
2009-06-22 0:43 ` pinskia at gcc dot gnu dot org
` (2 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: reichelt at gcc dot gnu dot org @ 2009-05-05 22:00 UTC (permalink / raw)
To: gcc-bugs
------- Comment #1 from reichelt at gcc dot gnu dot org 2009-05-05 22:00 -------
Here's a reduced version without includes:
===============================================
struct X
{
X(int, const int& = 0);
~X();
};
X x[2][3] = { { 0, 0, 0 }, { 0, 0, 0 } };
struct A
{
A(int);
};
struct B
{
A a1, a2, a3, a4, a5, a6;
};
B b[42] =
{
{ 0, 0, 0, 0, 0, 0 },
{ 0, 0, 0, 0, 0, 0 },
{ 0, 0, 0, 0, 0, 0 },
{ 0, 0, 0, 0, 0, 0 },
{ 0, 0, 0, 0, 0, 0 },
{ 0, 0, 0, 0, 0, 0 },
{ 0, 0, 0, 0, 0, 0 },
{ 0, 0, 0, 0, 0, 0 },
{ 0, 0, 0, 0, 0, 0 },
{ 0, 0, 0, 0, 0, 0 },
{ 0, 0, 0, 0, 0, 0 },
{ 0, 0, 0, 0, 0, 0 },
{ 0, 0, 0, 0, 0, 0 },
{ 0, 0, 0, 0, 0, 0 },
{ 0, 0, 0, 0, 0, 0 },
{ 0, 0, 0, 0, 0, 0 },
{ 0, 0, 0, 0, 0, 0 },
{ 0, 0, 0, 0, 0, 0 },
{ 0, 0, 0, 0, 0, 0 },
{ 0, 0, 0, 0, 0, 0 },
{ 0, 0, 0, 0, 0, 0 },
{ 0, 0, 0, 0, 0, 0 },
{ 0, 0, 0, 0, 0, 0 },
{ 0, 0, 0, 0, 0, 0 },
{ 0, 0, 0, 0, 0, 0 },
{ 0, 0, 0, 0, 0, 0 },
{ 0, 0, 0, 0, 0, 0 },
{ 0, 0, 0, 0, 0, 0 },
{ 0, 0, 0, 0, 0, 0 },
{ 0, 0, 0, 0, 0, 0 },
{ 0, 0, 0, 0, 0, 0 },
{ 0, 0, 0, 0, 0, 0 },
{ 0, 0, 0, 0, 0, 0 },
{ 0, 0, 0, 0, 0, 0 },
{ 0, 0, 0, 0, 0, 0 },
{ 0, 0, 0, 0, 0, 0 },
{ 0, 0, 0, 0, 0, 0 },
{ 0, 0, 0, 0, 0, 0 },
{ 0, 0, 0, 0, 0, 0 },
{ 0, 0, 0, 0, 0, 0 },
{ 0, 0, 0, 0, 0, 0 },
{ 0, 0, 0, 0, 0, 0 }
};
===============================================
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39974
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug tree-optimization/39974] [4.5 regression] Bogus "array subscript is below array bounds" warning in compiler generated code
2009-04-30 9:15 [Bug tree-optimization/39974] New: [4.5 regression] Bogus "array subscript is below array bounds" warning in compiler generated code reichelt at gcc dot gnu dot org
` (2 preceding siblings ...)
2009-05-05 22:00 ` reichelt at gcc dot gnu dot org
@ 2009-06-22 0:43 ` pinskia at gcc dot gnu dot org
2009-09-18 4:17 ` pinskia at gcc dot gnu dot org
2009-09-28 20:11 ` pinskia at gcc dot gnu dot org
5 siblings, 0 replies; 7+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2009-06-22 0:43 UTC (permalink / raw)
To: gcc-bugs
------- Comment #2 from pinskia at gcc dot gnu dot org 2009-06-22 00:43 -------
Confirmed.
--
pinskia at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Ever Confirmed|0 |1
Last reconfirmed|0000-00-00 00:00:00 |2009-06-22 00:43:26
date| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39974
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug tree-optimization/39974] [4.5 regression] Bogus "array subscript is below array bounds" warning in compiler generated code
2009-04-30 9:15 [Bug tree-optimization/39974] New: [4.5 regression] Bogus "array subscript is below array bounds" warning in compiler generated code reichelt at gcc dot gnu dot org
` (3 preceding siblings ...)
2009-06-22 0:43 ` pinskia at gcc dot gnu dot org
@ 2009-09-18 4:17 ` pinskia at gcc dot gnu dot org
2009-09-28 20:11 ` pinskia at gcc dot gnu dot org
5 siblings, 0 replies; 7+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2009-09-18 4:17 UTC (permalink / raw)
To: gcc-bugs
------- Comment #3 from pinskia at gcc dot gnu dot org 2009-09-18 04:17 -------
This works on the trunk with:
gcc version 4.5.0 20090917 (experimental) [trunk revision 151808] (GCC)
It did produce a warning with:
gcc version 4.5.0 20090706 (experimental) [trunk revision 149292] (GCC)
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39974
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug tree-optimization/39974] [4.5 regression] Bogus "array subscript is below array bounds" warning in compiler generated code
2009-04-30 9:15 [Bug tree-optimization/39974] New: [4.5 regression] Bogus "array subscript is below array bounds" warning in compiler generated code reichelt at gcc dot gnu dot org
` (4 preceding siblings ...)
2009-09-18 4:17 ` pinskia at gcc dot gnu dot org
@ 2009-09-28 20:11 ` pinskia at gcc dot gnu dot org
5 siblings, 0 replies; 7+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2009-09-28 20:11 UTC (permalink / raw)
To: gcc-bugs
------- Comment #4 from pinskia at gcc dot gnu dot org 2009-09-28 20:11 -------
Fixed so closing as such.
--
pinskia at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution| |FIXED
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39974
^ permalink raw reply [flat|nested] 7+ messages in thread
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2009-04-30 9:15 [Bug tree-optimization/39974] New: [4.5 regression] Bogus "array subscript is below array bounds" warning in compiler generated code reichelt at gcc dot gnu dot org
2009-04-30 9:15 ` [Bug tree-optimization/39974] " reichelt at gcc dot gnu dot org
2009-05-05 15:51 ` mmitchel at gcc dot gnu dot org
2009-05-05 22:00 ` reichelt at gcc dot gnu dot org
2009-06-22 0:43 ` pinskia at gcc dot gnu dot org
2009-09-18 4:17 ` pinskia at gcc dot gnu dot org
2009-09-28 20:11 ` pinskia at gcc dot gnu dot org
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