c++/5748: g++ dies with optimization

c++/5748: g++ dies with optimization

[jwheeler]

>Number:         5748
>Category:       c++
>Synopsis:       g++ dies with optimization
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Thu Feb 21 13:26:05 PST 2002
>Closed-Date:
>Last-Modified:
>Originator:     Joel Wheeler
>Release:        g++ 3.0.3
>Organization:
>Environment:
Configured with: ../gcc303src/gcc-3.0.3/configure --prefix=/afs/btv.ibm.com/u1/tds6000/v5/contrib/gcc303
Thread model: single
gcc version 3.0.3
 /afs/btv.ibm.com/u1/tds6000/v5/contrib/gcc303/lib/gcc-lib/i686-pc-linux-gnu/3.0.3/cpp0 -lang-c++ -D__GNUG__=3 -D__GXX_DEPRECATED -D__EXCEP
linux__ -D__unix -D__linux -Asystem=posix -D__OPTIMIZE__ -D__STDC_HOSTED__=1 -Wall -D_GNU_SOURCE -Acpu=i386 -Amachine=i386 -Di386 -D__i386
-D__i386__ -D__tune_i686__ -D__tune_pentiumpro__ testcase.cpp testcase.ii
GNU CPP version 3.0.3 (cpplib) (i386 Linux/ELF)
ignoring nonexistent directory "/afs/btv.ibm.com/u1/tds6000/v5/contrib/gcc303/i686-pc-linux-gnu/include"
#include "..." search starts here:
#include <...> search starts here:
 /afs/btv.ibm.com/u1/tds6000/v5/contrib/gcc303/include/g++-v3
 /afs/btv.ibm.com/u1/tds6000/v5/contrib/gcc303/include/g++-v3/i686-pc-linux-gnu
 /afs/btv.ibm.com/u1/tds6000/v5/contrib/gcc303/include/g++-v3/backward
 /usr/local/include
 /afs/btv.ibm.com/u1/tds6000/v5/contrib/gcc303/lib/gcc-lib/i686-pc-linux-gnu/3.0.3/include
 /usr/include
End of search list.
 /afs/btv.ibm.com/u1/tds6000/v5/contrib/gcc303/lib/gcc-lib/i686-pc-linux-gnu/3.0.3/cc1plus -fpreprocessed testcase.ii -quiet -dumpbase testcase.cpp -O2 -Wall -version -o testcase.s
GNU CPP version 3.0.3 (cpplib) (i386 Linux/ELF)
GNU C++ version 3.0.3 (i686-pc-linux-gnu)
        compiled by GNU C version 3.0.3. 
>Description:
Compiler dies during compiling when compiling using optimization.
When compiling with [-g] flag instead of -O1 or -O2 there is no compiler error.

See the following error when compiling:
testcase.cpp: In method `int TESTCLASS::kill_compiler()':
testcase.cpp:18: warning: unused variable `long unsigned int efi'
testcase.cpp:24: Internal compiler error in elimination_effects, at reload1.c:
   2696
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://www.gnu.org/software/gcc/bugs.html> for instructions. 

I didnt include preprocessed source since Ive boiled the testcase down as much as possible (very small)
>How-To-Repeat:
g++ -O2 testcase.cpp
>Fix:

>Release-Note:
>Audit-Trail:
>Unformatted:
----gnatsweb-attachment----
Content-Type: application/octet-stream; name="testcase.cpp"
Content-Transfer-Encoding: base64
Content-Disposition: attachment; filename="testcase.cpp"

Ly8gY29tcGlsZSB3aXRoICJnKysgLU8yIHRlc3RjYXNlLmNwcCINCg0KY2xhc3MgVEVTVENMQVNT
ICAgew0KDQogIHB1YmxpYzoNCiAgICBURVNUQ0xBU1MoKTsNCiAgICB+VEVTVENMQVNTKCk7DQoN
CiAgICBpbnQgICAgICAgIGtpbGxfY29tcGlsZXIoKTsNCiAgICBpbnQgICAgICAgIHJlYWQodm9p
ZCAgKnBfZGF0YSwgdW5zaWduZWQgbG9uZyBuYnl0ZXMpOw0KfTsNCg0KaW50IFRFU1RDTEFTUzo6
a2lsbF9jb21waWxlcigpIHsNCg0KICB1bmlvbiB7DQogICAgdW5zaWduZWQgbG9uZyAgICAgIGVm
Ow0KICAgIHVuc2lnbmVkIGxvbmcgICAgICBlZmk7DQogIH07DQoNCiAgLy8gVGhpcyBsaW5lIGNh
dXNlcyB0aGUgaW50ZXJuYWwgY29tcGlsZXIgZXJyb3I6DQogIGlmIChyZWFkKCZlZiwgc2l6ZW9m
KHVuc2lnbmVkIGxvbmcpKSAhPSAzMikgcmV0dXJuIDE2Ow0KICByZXR1cm4gMDsNCg0KfQ0KDQpp
bnQgbWFpbigpIHt9DQo=

Re: c++/5748: g++ dies with optimization

[jakub]

Synopsis: g++ dies with optimization

State-Changed-From-To: open->closed
State-Changed-By: jakub
State-Changed-When: Fri Feb 22 13:18:36 2002
State-Changed-Why:
    Fixed by http://gcc.gnu.org/ml/gcc-patches/2002-02/msg01547.html

http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=5748