[Bug c/25990] New: gomp ICE with -fopenmp and -O2

[perrin at msli dot com]

The attached code ICE's with -fopenmp and -O2, but not with just -fopenmp

I build both the recent trunk (svn 110282) and the gomp branch, and it ICE's
with both. 

/home/perrin/GOMP/INSTALL/110296/bin/gcc -Wall -std=c99 -v --save-temps -O2 
-fopenmp    -m64 -o test_gomp_2 test_gomp_2.c
Using built-in specs.
Target: x86_64-unknown-linux-gnu
Configured with: /home/perrin/GOMP/gomp-20050608-branch/configure
--prefix=/home/perrin/GOMP/INSTALL/110296/ --enable-threads=posix
--enable-languages=c,c++,fortran
Thread model: posix
gcc version 4.2.0-gomp-20050608-branch 20060126 (experimental) (merged
20060126)

/home/perrin/GOMP/INSTALL/110296/bin/../libexec/gcc/x86_64-unknown-linux-gnu/4.2.0-gomp-20050608-branch/cc1
-E -quiet -v -iprefix
/home/perrin/GOMP/INSTALL/110296/bin/../lib/gcc/x86_64-unknown-linux-gnu/4.2.0-gomp-20050608-branch/
-D_REENTRANT test_gomp_2.c -m64 -mtune=generic -std=c99 -Wall -fopenmp -O2
-fpch-preprocess -o test_gomp_2.i
ignoring nonexistent directory
"/home/perrin/GOMP/INSTALL/110296/bin/../lib/gcc/x86_64-unknown-linux-gnu/4.2.0-gomp-20050608-branch/../../../../x86_64-unknown-linux-gnu/include"
ignoring duplicate directory
"/home/perrin/GOMP/INSTALL/110296//lib/gcc/x86_64-unknown-linux-gnu/4.2.0-gomp-20050608-branch/include"
ignoring nonexistent directory
"/home/perrin/GOMP/INSTALL/110296//lib/gcc/x86_64-unknown-linux-gnu/4.2.0-gomp-20050608-branch/../../../../x86_64-unknown-linux-gnu/include"
#include "..." search starts here:
#include <...> search starts here:

/home/perrin/GOMP/INSTALL/110296/bin/../lib/gcc/x86_64-unknown-linux-gnu/4.2.0-gomp-20050608-branch/include
 /usr/local/include
 /home/perrin/GOMP/INSTALL/110296//include
 /usr/include
End of search list.

/home/perrin/GOMP/INSTALL/110296/bin/../libexec/gcc/x86_64-unknown-linux-gnu/4.2.0-gomp-20050608-branch/cc1
-fpreprocessed test_gomp_2.i -quiet -dumpbase test_gomp_2.c -m64 -mtune=generic
-auxbase test_gomp_2 -O2 -Wall -std=c99 -version -fopenmp -o test_gomp_2.s
GNU C version 4.2.0-gomp-20050608-branch 20060126 (experimental) (merged
20060126) (x86_64-unknown-linux-gnu)
        compiled by GNU C version 4.2.0-gomp-20050608-branch 20060126
(experimental) (merged 20060126).
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
Compiler executable checksum: b18775707d7fd6662765314b1efc240e
test_gomp_2.c: In function 'main':
test_gomp_2.c:121: warning: unused variable 'HH'
test_gomp_2.c:120: warning: unused variable 'GG'
test_gomp_2.c: In function 'main.omp_fn.1':
test_gomp_2.c:223: internal compiler error: Segmentation fault
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://gcc.gnu.org/bugs.html> for instructions.
make: *** [test_gomp] Error 1


-- 
           Summary: gomp ICE with -fopenmp and -O2
           Product: gcc
           Version: 4.2.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: perrin at msli dot com


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25990