http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43716
--- Comment #32 from Uros Bizjak <ubizjak at gmail dot com> 2012-07-21 10:49:31 UTC --- gcc version 4.8.0 20120720 (experimental) [trunk revision 189718] (GCC) ==2822== Memcheck, a memory error detector ==2822== Copyright (C) 2002-2011, and GNU GPL'd, by Julian Seward et al. ==2822== Using Valgrind-3.7.0 and LibVEX; rerun with -h for copyright info ==2822== Command: ./a.out ==2822== MAIN : FIN S00002 MAIN : FIN S00001 MAIN : FIN S00011 MAIN : FIN S00022 TEMPS = 33.00000000 , NITERA : 1 TEMPS = 34.00031044 , NITERA : 186 TEMPS = 35.00497388 , NITERA : 955 TEMPS = 36.00007615 , NITERA : 1512 TEMPS = 37.00012624 , NITERA : 1765 TEMPS = 38.00060760 , NITERA : 2044 TEMPS = 39.00312223 , NITERA : 2327 TEMPS = 40.00168143 , NITERA : 2607 TEMPS = 45.00187475 , NITERA : 4017 TEMPS = 50.00261983 , NITERA : 5492 TEMPS = 55.00263522 , NITERA : 6981 TEMPS = 60.00087007 , NITERA : 8679 ==2822== Invalid read of size 8 ==2822== at 0x4040E8: s00061_ (doduc.f90:568) ==2822== by 0x412AD3: s00013_ (doduc.f90:1150) ==2822== by 0x41B9D4: MAIN__ (doduc.f90:182) ==2822== by 0x400B4C: main (doduc.f90:199) ==2822== Address 0x3fefff770 is not stack'd, malloc'd or (recently) free'd ==2822== I can reproduce it here with Rev. 189737; it also crashes without running valgrind. It crashes (on x86-64 openSUSE Factory) with -O3 -ffast-math [-g] It does not crash with either of the following added: -fno-fast-math -fno-inline-functions -fno-predictive-commoning -fno-tree-vectorize -fno-protect-parens (implied by -Ofast) Nor does it crash with: -O2 -ftree-vectorize -finline-functions -ffpredictive-commoning -ffast-math -m32 -O3 -ffast-math
