[forwarded from http://bugs.debian.org/280972]
gcc version 4.0.0 20041127 (experimental)
% gcc div.c && ./a.out
1 2 4 8 5 10 20 40 25 50 100 200 125 250 500 1000
% gcc -O1 div.c && ./a.out
zsh: segmentation fault (core dumped) ./a.out
The original reporter says he gets bogus output instead of a segfault.
This doesn't happen with gcc 3.3 or 3.4. Neither -fno-strict-aliasing
nor -fno-ivopts helps.
--
Summary: [4.0 regression] loop miscompilation at -O1
Product: gcc
Version: 4.0.0
Status: UNCONFIRMED
Keywords: wrong-code
Severity: normal
Priority: P2
Component: tree-optimization
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: falk at debian dot org
CC: gcc-bugs at gcc dot gnu dot org
GCC build triplet: alphaev68-unknown-linux-gnu
GCC host triplet: alphaev68-unknown-linux-gnu
GCC target triplet: alphaev68-unknown-linux-gnu
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18694
