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Subject: [Bug tree-optimization/44776] FAIL: gcc.dg/matrix/transpose-3.c execution,    -fprofile-use -fipa-matrix-reorg -fdump-ipa-matrix-reorg -O3 -fwhole-program
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44776

--- Comment #12 from Zdenek Sojka <zsojka at seznam dot cz> 2010-12-20 18:00:15 UTC ---
Created attachment 22831
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=22831
simpler testcase

Crashes on x86_64-linux, r168061

$ gcc -O -fipa-matrix-reorg -fwhole-program pr44776-2.c
$ ./a.out 
Segmentation fault


With valgrind:
$ valgrind -q ./a.out 
==16712== Invalid write of size 4
==16712==    at 0x4005BC: main (pr44776-2.c:10)
==16712==  Address 0x5186050 is 0 bytes after a block of size 16 alloc'd
==16712==    at 0x4C2648E: malloc (in
/usr/lib64/valgrind/vgpreload_memcheck-amd64-linux.so)
==16712==    by 0x4005A7: main (pr44776-2.c:13)
==16712== 
==16712== Invalid read of size 4
==16712==    at 0x4005F9: main (pr44776-2.c:25)
==16712==  Address 0x5186050 is 0 bytes after a block of size 16 alloc'd
==16712==    at 0x4C2648E: malloc (in
/usr/lib64/valgrind/vgpreload_memcheck-amd64-linux.so)
==16712==    by 0x4005A7: main (pr44776-2.c:13)
==16712== 
==16712== Invalid write of size 4
==16712==    at 0x400602: main (pr44776-2.c:27)
==16712==  Address 0x5186050 is 0 bytes after a block of size 16 alloc'd
==16712==    at 0x4C2648E: malloc (in
/usr/lib64/valgrind/vgpreload_memcheck-amd64-linux.so)
==16712==    by 0x4005A7: main (pr44776-2.c:13)
==16712== 
==16712== Invalid read of size 4
==16712==    at 0x400629: main (pr44776-2.c:25)
==16712==  Address 0x5286040 is not stack'd, malloc'd or (recently) free'd
==16712== 
==16712== Invalid write of size 4
==16712==    at 0x40063F: main (pr44776-2.c:27)
==16712==  Address 0x5286040 is not stack'd, malloc'd or (recently) free'd
==16712==