* [Bug inline-asm/24761] Missing register load before inline asm in templated function causes SIGSEGV
2005-11-09 19:43 [Bug inline-asm/24761] New: Missing register load before inline asm in templated function causes SIGSEGV krzysiek-gcc dot gnu dot org at lichota dot net
@ 2005-11-09 19:46 ` krzysiek-gcc dot gnu dot org at lichota dot net
2005-11-09 19:50 ` krzysiek-gcc dot gnu dot org at lichota dot net
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From: krzysiek-gcc dot gnu dot org at lichota dot net @ 2005-11-09 19:46 UTC (permalink / raw)
To: gcc-bugs
------- Comment #1 from krzysiek-gcc dot gnu dot org at lichota dot net 2005-11-09 19:46 -------
Created an attachment (id=10193)
--> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=10193&action=view)
Testcase for the bug
This is the testcase. Compile with:
g++-4.0 -save-temps -fPIC -ggdb3 -Wno-non-virtual-dtor -O0 -pthread
-fkeep-inline-functions testcase10.cpp
When both calls to bar() are instantiated, the segfault occurs.
When only one is instantiated (the other is commented out), it works correctly.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=24761
^ permalink raw reply [flat|nested] 10+ messages in thread* [Bug inline-asm/24761] Missing register load before inline asm in templated function causes SIGSEGV
2005-11-09 19:43 [Bug inline-asm/24761] New: Missing register load before inline asm in templated function causes SIGSEGV krzysiek-gcc dot gnu dot org at lichota dot net
2005-11-09 19:46 ` [Bug inline-asm/24761] " krzysiek-gcc dot gnu dot org at lichota dot net
@ 2005-11-09 19:50 ` krzysiek-gcc dot gnu dot org at lichota dot net
2005-11-09 20:00 ` krzysiek-gcc dot gnu dot org at lichota dot net
` (6 subsequent siblings)
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From: krzysiek-gcc dot gnu dot org at lichota dot net @ 2005-11-09 19:50 UTC (permalink / raw)
To: gcc-bugs
------- Comment #2 from krzysiek-gcc dot gnu dot org at lichota dot net 2005-11-09 19:49 -------
Created an attachment (id=10195)
--> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=10195&action=view)
Assembler code generated from testcase
This is code generated from testcase.
In first instantiation eax register is loaded before inline asm starts:
.loc 1 25 0
movl -16(%ebp), %eax
addl -20(%ebp), %eax
sall $2, %eax
addl 8(%ebp), %eax
movl %eax, -8(%ebp)
.loc 1 41 0
movl -16(%ebp), %eax
addl -24(%ebp), %eax
sall $2, %eax
movl %eax, %edx
addl -12(%ebp), %edx
movl -8(%ebp), %eax
#APP
movq (%edx), %mm0 ;
In the second instantiation, eax is not loaded:
.loc 1 25 0
movl -16(%ebp), %eax
addl -20(%ebp), %eax
sall $2, %eax
addl 8(%ebp), %eax
movl %eax, -8(%ebp)
.loc 1 41 0
movl -16(%ebp), %eax
addl -24(%ebp), %eax
sall $2, %eax
movl %eax, %edx
addl -12(%ebp), %edx
#APP
movq (%edx), %mm0 ;
Then in line:
pxor (%eax), %mm0 ;
eax is dereferenced and segfault occurs.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=24761
^ permalink raw reply [flat|nested] 10+ messages in thread* [Bug inline-asm/24761] Missing register load before inline asm in templated function causes SIGSEGV
2005-11-09 19:43 [Bug inline-asm/24761] New: Missing register load before inline asm in templated function causes SIGSEGV krzysiek-gcc dot gnu dot org at lichota dot net
2005-11-09 19:46 ` [Bug inline-asm/24761] " krzysiek-gcc dot gnu dot org at lichota dot net
2005-11-09 19:50 ` krzysiek-gcc dot gnu dot org at lichota dot net
@ 2005-11-09 20:00 ` krzysiek-gcc dot gnu dot org at lichota dot net
2005-11-09 20:24 ` [Bug c++/24761] [4.0/4.1 Regression] " pinskia at gcc dot gnu dot org
` (5 subsequent siblings)
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From: krzysiek-gcc dot gnu dot org at lichota dot net @ 2005-11-09 20:00 UTC (permalink / raw)
To: gcc-bugs
------- Comment #3 from krzysiek-gcc dot gnu dot org at lichota dot net 2005-11-09 20:00 -------
Created an attachment (id=10196)
--> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=10196&action=view)
Correct code generated by g++ 3.4.2
This is the correct code generated by g++ 3.4.2. It loads eax before inline asm
starts in both instantiations.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=24761
^ permalink raw reply [flat|nested] 10+ messages in thread* [Bug c++/24761] [4.0/4.1 Regression] Missing register load before inline asm in templated function causes SIGSEGV
2005-11-09 19:43 [Bug inline-asm/24761] New: Missing register load before inline asm in templated function causes SIGSEGV krzysiek-gcc dot gnu dot org at lichota dot net
` (2 preceding siblings ...)
2005-11-09 20:00 ` krzysiek-gcc dot gnu dot org at lichota dot net
@ 2005-11-09 20:24 ` pinskia at gcc dot gnu dot org
2005-11-09 20:28 ` [Bug c++/24761] [4.0/4.1 Regression] templates and inline-asm and "+" pinskia at gcc dot gnu dot org
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From: pinskia at gcc dot gnu dot org @ 2005-11-09 20:24 UTC (permalink / raw)
To: gcc-bugs
------- Comment #4 from pinskia at gcc dot gnu dot org 2005-11-09 20:24 -------
Simplified example:
template <int>
int f(int i)
{
asm("%0 %1 " : "+r"(i) );
return i;
}
int main(void)
{
f<0>(0)+ f<1>(0);
}
-----
--
pinskia at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Severity|normal |critical
Status|UNCONFIRMED |NEW
Component|inline-asm |c++
Ever Confirmed|0 |1
Keywords| |wrong-code
Known to fail| |2.95.3 4.0.0 4.1.0
Known to work| |3.4.0 3.3.3 3.2.3 3.0.4
Last reconfirmed|0000-00-00 00:00:00 |2005-11-09 20:24:19
date| |
Summary|Missing register load before|[4.0/4.1 Regression] Missing
|inline asm in templated |register load before inline
|function causes SIGSEGV |asm in templated function
| |causes SIGSEGV
Target Milestone|--- |4.0.3
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=24761
^ permalink raw reply [flat|nested] 10+ messages in thread* [Bug c++/24761] [4.0/4.1 Regression] templates and inline-asm and "+"
2005-11-09 19:43 [Bug inline-asm/24761] New: Missing register load before inline asm in templated function causes SIGSEGV krzysiek-gcc dot gnu dot org at lichota dot net
` (3 preceding siblings ...)
2005-11-09 20:24 ` [Bug c++/24761] [4.0/4.1 Regression] " pinskia at gcc dot gnu dot org
@ 2005-11-09 20:28 ` pinskia at gcc dot gnu dot org
2005-11-10 9:03 ` jakub at gcc dot gnu dot org
` (3 subsequent siblings)
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From: pinskia at gcc dot gnu dot org @ 2005-11-09 20:28 UTC (permalink / raw)
To: gcc-bugs
------- Comment #5 from pinskia at gcc dot gnu dot org 2005-11-09 20:28 -------
For the first time template is instantiated, we get:
__asm__("%0 %1 ":"=r" i:"0" i);
The second time, we get:
__asm__("%0 %1 ":"=r" i:);
Somehow we brought back a bug from 2.95.3 (weird isn't it).
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=24761
^ permalink raw reply [flat|nested] 10+ messages in thread* [Bug c++/24761] [4.0/4.1 Regression] templates and inline-asm and "+"
2005-11-09 19:43 [Bug inline-asm/24761] New: Missing register load before inline asm in templated function causes SIGSEGV krzysiek-gcc dot gnu dot org at lichota dot net
` (4 preceding siblings ...)
2005-11-09 20:28 ` [Bug c++/24761] [4.0/4.1 Regression] templates and inline-asm and "+" pinskia at gcc dot gnu dot org
@ 2005-11-10 9:03 ` jakub at gcc dot gnu dot org
2005-11-12 20:42 ` jakub at gcc dot gnu dot org
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From: jakub at gcc dot gnu dot org @ 2005-11-10 9:03 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|2005-11-09 20:24:19 |2005-11-10 09:03:35
date| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=24761
^ permalink raw reply [flat|nested] 10+ messages in thread* [Bug c++/24761] [4.0/4.1 Regression] templates and inline-asm and "+"
2005-11-09 19:43 [Bug inline-asm/24761] New: Missing register load before inline asm in templated function causes SIGSEGV krzysiek-gcc dot gnu dot org at lichota dot net
` (5 preceding siblings ...)
2005-11-10 9:03 ` jakub at gcc dot gnu dot org
@ 2005-11-12 20:42 ` jakub at gcc dot gnu dot org
2005-11-12 20:43 ` jakub at gcc dot gnu dot org
2005-11-12 22:13 ` pinskia at gcc dot gnu dot org
8 siblings, 0 replies; 10+ messages in thread
From: jakub at gcc dot gnu dot org @ 2005-11-12 20:42 UTC (permalink / raw)
To: gcc-bugs
------- Comment #6 from jakub at gcc dot gnu dot org 2005-11-12 20:42 -------
Subject: Bug 24761
Author: jakub
Date: Sat Nov 12 20:42:23 2005
New Revision: 106831
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=106831
Log:
PR c++/24761
* pt.c (tsubst_copy_asm_operands): New function.
(tsubst_expr) <case ASM_EXPR>: Use it.
* g++.dg/template/asm1.C: New test.
Added:
trunk/gcc/testsuite/g++.dg/template/asm1.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/pt.c
trunk/gcc/testsuite/ChangeLog
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=24761
^ permalink raw reply [flat|nested] 10+ messages in thread* [Bug c++/24761] [4.0/4.1 Regression] templates and inline-asm and "+"
2005-11-09 19:43 [Bug inline-asm/24761] New: Missing register load before inline asm in templated function causes SIGSEGV krzysiek-gcc dot gnu dot org at lichota dot net
` (6 preceding siblings ...)
2005-11-12 20:42 ` jakub at gcc dot gnu dot org
@ 2005-11-12 20:43 ` jakub at gcc dot gnu dot org
2005-11-12 22:13 ` pinskia at gcc dot gnu dot org
8 siblings, 0 replies; 10+ messages in thread
From: jakub at gcc dot gnu dot org @ 2005-11-12 20:43 UTC (permalink / raw)
To: gcc-bugs
------- Comment #7 from jakub at gcc dot gnu dot org 2005-11-12 20:43 -------
Subject: Bug 24761
Author: jakub
Date: Sat Nov 12 20:43:27 2005
New Revision: 106832
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=106832
Log:
PR c++/24761
* pt.c (tsubst_copy_asm_operands): New function.
(tsubst_expr) <case ASM_EXPR>: Use it.
* g++.dg/template/asm1.C: New test.
Added:
branches/gcc-4_0-branch/gcc/testsuite/g++.dg/template/asm1.C
Modified:
branches/gcc-4_0-branch/gcc/cp/ChangeLog
branches/gcc-4_0-branch/gcc/cp/pt.c
branches/gcc-4_0-branch/gcc/testsuite/ChangeLog
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=24761
^ permalink raw reply [flat|nested] 10+ messages in thread* [Bug c++/24761] [4.0/4.1 Regression] templates and inline-asm and "+"
2005-11-09 19:43 [Bug inline-asm/24761] New: Missing register load before inline asm in templated function causes SIGSEGV krzysiek-gcc dot gnu dot org at lichota dot net
` (7 preceding siblings ...)
2005-11-12 20:43 ` jakub at gcc dot gnu dot org
@ 2005-11-12 22:13 ` pinskia at gcc dot gnu dot org
8 siblings, 0 replies; 10+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2005-11-12 22:13 UTC (permalink / raw)
To: gcc-bugs
------- Comment #8 from pinskia at gcc dot gnu dot org 2005-11-12 22:13 -------
Fixed.
--
pinskia at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution| |FIXED
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=24761
^ permalink raw reply [flat|nested] 10+ messages in thread