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* [Bug c/19411] New: Simple program causes gcc to run out of memory
@ 2005-01-12 22:55 gcc-bugzilla at gcc dot gnu dot org
  2005-01-12 23:07 ` [Bug preprocessor/19411] " pinskia at gcc dot gnu dot org
                   ` (6 more replies)
  0 siblings, 7 replies; 8+ messages in thread
From: gcc-bugzilla at gcc dot gnu dot org @ 2005-01-12 22:55 UTC (permalink / raw)
  To: gcc-bugs



A simple program causes gcc to use inordinate amounts of memory
and finally crash.

Environment:
System: Linux glauke 2.6.8-powerpc #1 Sun Oct 3 13:22:21 CEST 2004 ppc GNU/Linux
Architecture: ppc

host: powerpc-unknown-linux-gnu
build: powerpc-unknown-linux-gnu
target: powerpc-unknown-linux-gnu
configured with: ../src/configure -v --enable-languages=c,c++,java,f77,pascal,objc,ada --prefix=/usr --libexecdir=/usr/lib --with-gxx-include-dir=/usr/include/c++/3.4 --enable-shared --with-system-zlib --enable-nls --without-included-gettext --program-suffix=-3.4 --enable-__cxa_atexit --enable-libstdcxx-allocator=mt --enable-clocale=gnu --enable-libstdcxx-debug --enable-java-gc=boehm --enable-java-awt=gtk --disable-multilib --disable-softfloat powerpc-linux

How-To-Repeat:

Compile this program as follows:

  gcc-3.4 -maltivec prog.c

prog.c follows:

#include <altivec.h>

vector float foo(vector float a)
{
     return vec_add(a, 
		    vec_add(a, 
			    vec_add(a, 
				    vec_add(a, a))));
}
------- Additional Comments From athena at fftw dot org  2005-01-12 22:55 -------
Fix:

Declare explicit temporary variables for the intermediate results.

-- 
           Summary: Simple program causes gcc to run out of memory
           Product: gcc
           Version: 3.4.3
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: athena at fftw dot org
                CC: gcc-bugs at gcc dot gnu dot org
 GCC build triplet: powerpc-unknown-linux-gnu
  GCC host triplet: powerpc-unknown-linux-gnu
GCC target triplet: powerpc-unknown-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19411


^ permalink raw reply	[flat|nested] 8+ messages in thread
* [Bug preprocessor/19411] Simple program causes gcc to run out of memory
  2005-01-12 22:55 [Bug c/19411] New: Simple program causes gcc to run out of memory gcc-bugzilla at gcc dot gnu dot org
@ 2005-01-12 23:07 ` pinskia at gcc dot gnu dot org
  2005-02-07 20:15 ` amodra at bigpond dot net dot au
                   ` (5 subsequent siblings)
  6 siblings, 0 replies; 8+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2005-01-12 23:07 UTC (permalink / raw)
  To: gcc-bugs


------- Additional Comments From pinskia at gcc dot gnu dot org  2005-01-12 23:07 -------
This is the preprocessor f'ing up.  The macros are complex which cause the problem, I might be able 
get a self contained example later on.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
          Component|c                           |preprocessor
           Keywords|                            |memory-hog


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19411


^ permalink raw reply	[flat|nested] 8+ messages in thread
* [Bug preprocessor/19411] Simple program causes gcc to run out of memory
  2005-01-12 22:55 [Bug c/19411] New: Simple program causes gcc to run out of memory gcc-bugzilla at gcc dot gnu dot org
  2005-01-12 23:07 ` [Bug preprocessor/19411] " pinskia at gcc dot gnu dot org
@ 2005-02-07 20:15 ` amodra at bigpond dot net dot au
  2005-02-08 18:53 ` pinskia at gcc dot gnu dot org
                   ` (4 subsequent siblings)
  6 siblings, 0 replies; 8+ messages in thread
From: amodra at bigpond dot net dot au @ 2005-02-07 20:15 UTC (permalink / raw)
  To: gcc-bugs


------- Additional Comments From amodra at bigpond dot net dot au  2005-02-07 06:58 -------
I wouldn't blame the preprocessor.  The macros in altivec.h for C support have
multiple occurences of their arguments.  __builtin_choose_expr only evaluates
one occurence, but that doesn't stop the preprocessor *substituting* the macro
args multiple times.
  vec_add (a, a) expands to 8006 chars,
  vec_add (a, vec_add (a, a)) expands to 321430
  vec_add (1, vec_add (a, vec_add (a, a))) expands to 12231542
and I didn't even try four levels.

Perhaps this comment in altivec.h explains it..
/* "... and so I think no man in a century will suffer as greatly as
   you will."  */


-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |aldyh at redhat dot com
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|                            |1
   Last reconfirmed|0000-00-00 00:00:00         |2005-02-07 06:58:47
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19411


^ permalink raw reply	[flat|nested] 8+ messages in thread
* [Bug preprocessor/19411] Simple program causes gcc to run out of memory
  2005-01-12 22:55 [Bug c/19411] New: Simple program causes gcc to run out of memory gcc-bugzilla at gcc dot gnu dot org
  2005-01-12 23:07 ` [Bug preprocessor/19411] " pinskia at gcc dot gnu dot org
  2005-02-07 20:15 ` amodra at bigpond dot net dot au
@ 2005-02-08 18:53 ` pinskia at gcc dot gnu dot org
  2005-02-16  6:42 ` [Bug target/19411] " amodra at bigpond dot net dot au
                   ` (3 subsequent siblings)
  6 siblings, 0 replies; 8+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2005-02-08 18:53 UTC (permalink / raw)
  To: gcc-bugs


------- Additional Comments From pinskia at gcc dot gnu dot org  2005-02-08 13:27 -------
*** Bug 19821 has been marked as a duplicate of this bug. ***

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |pochini at shiny dot it


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19411


^ permalink raw reply	[flat|nested] 8+ messages in thread
* [Bug target/19411] Simple program causes gcc to run out of memory
  2005-01-12 22:55 [Bug c/19411] New: Simple program causes gcc to run out of memory gcc-bugzilla at gcc dot gnu dot org
                   ` (2 preceding siblings ...)
  2005-02-08 18:53 ` pinskia at gcc dot gnu dot org
@ 2005-02-16  6:42 ` amodra at bigpond dot net dot au
  2005-05-06  6:22 ` pinskia at gcc dot gnu dot org
                   ` (2 subsequent siblings)
  6 siblings, 0 replies; 8+ messages in thread
From: amodra at bigpond dot net dot au @ 2005-02-16  6:42 UTC (permalink / raw)
  To: gcc-bugs


------- Additional Comments From amodra at bigpond dot net dot au  2005-02-16 01:03 -------
Changing to target since this is due to Aldy's altivec.h implementation.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
          Component|preprocessor                |target
      Known to fail|                            |4.0.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19411


^ permalink raw reply	[flat|nested] 8+ messages in thread
* [Bug target/19411] Simple program causes gcc to run out of memory
  2005-01-12 22:55 [Bug c/19411] New: Simple program causes gcc to run out of memory gcc-bugzilla at gcc dot gnu dot org
                   ` (3 preceding siblings ...)
  2005-02-16  6:42 ` [Bug target/19411] " amodra at bigpond dot net dot au
@ 2005-05-06  6:22 ` pinskia at gcc dot gnu dot org
  2005-05-25 22:21 ` pinskia at gcc dot gnu dot org
  2005-09-07  0:25 ` pinskia at gcc dot gnu dot org
  6 siblings, 0 replies; 8+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2005-05-06  6:22 UTC (permalink / raw)
  To: gcc-bugs


------- Additional Comments From pinskia at gcc dot gnu dot org  2005-05-06 06:22 -------
Fixed in 4.1.0 and above by:
2005-05-02  Paolo Bonzini  <bonzini@gnu.org>

        * c-common.c (resolve_overloaded_builtin): Forward to target
        hook for BUILT_IN_MD built-ins.
....

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |FIXED
   Target Milestone|---                         |4.1.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19411


^ permalink raw reply	[flat|nested] 8+ messages in thread
* [Bug target/19411] Simple program causes gcc to run out of memory
  2005-01-12 22:55 [Bug c/19411] New: Simple program causes gcc to run out of memory gcc-bugzilla at gcc dot gnu dot org
                   ` (4 preceding siblings ...)
  2005-05-06  6:22 ` pinskia at gcc dot gnu dot org
@ 2005-05-25 22:21 ` pinskia at gcc dot gnu dot org
  2005-09-07  0:25 ` pinskia at gcc dot gnu dot org
  6 siblings, 0 replies; 8+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2005-05-25 22:21 UTC (permalink / raw)
  To: gcc-bugs


------- Additional Comments From pinskia at gcc dot gnu dot org  2005-05-25 22:14 -------
*** Bug 21758 has been marked as a duplicate of this bug. ***

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |pluto at agmk dot net


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19411


^ permalink raw reply	[flat|nested] 8+ messages in thread
* [Bug target/19411] Simple program causes gcc to run out of memory
  2005-01-12 22:55 [Bug c/19411] New: Simple program causes gcc to run out of memory gcc-bugzilla at gcc dot gnu dot org
                   ` (5 preceding siblings ...)
  2005-05-25 22:21 ` pinskia at gcc dot gnu dot org
@ 2005-09-07  0:25 ` pinskia at gcc dot gnu dot org
  6 siblings, 0 replies; 8+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2005-09-07  0:25 UTC (permalink / raw)
  To: gcc-bugs


------- Additional Comments From pinskia at gcc dot gnu dot org  2005-09-07 00:25 -------
*** Bug 23759 has been marked as a duplicate of this bug. ***

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |Daniel dot Davies at xerox
                   |                            |dot com


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19411


^ permalink raw reply	[flat|nested] 8+ messages in thread
end of thread, other threads:[~2005-09-07  0:25 UTC | newest]

Thread overview: 8+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2005-01-12 22:55 [Bug c/19411] New: Simple program causes gcc to run out of memory gcc-bugzilla at gcc dot gnu dot org
2005-01-12 23:07 ` [Bug preprocessor/19411] " pinskia at gcc dot gnu dot org
2005-02-07 20:15 ` amodra at bigpond dot net dot au
2005-02-08 18:53 ` pinskia at gcc dot gnu dot org
2005-02-16  6:42 ` [Bug target/19411] " amodra at bigpond dot net dot au
2005-05-06  6:22 ` pinskia at gcc dot gnu dot org
2005-05-25 22:21 ` pinskia at gcc dot gnu dot org
2005-09-07  0:25 ` pinskia at gcc dot gnu dot org

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