On x86_64-apple-darwin10 the polyhedron test capacita.f90 is miscompiled with
'-O3 -finline-limit=600 -flto' at revision 160679 (revision 160678 is fine):
[macbook] lin/test% gfcp -O3 -finline-limit=600 -flto capacita.f90
[macbook] lin/test% a.out
Give: N_x, N_y, GridSize_X, GridSize_Y, DoCircle, UseFFT, UsePreco
N_x and N_y give the grid division in x and y-directions and
should be powers of 2, DoCircle and UseFFT are T or F (true
or false). If DoCircle=T, the case of an ellipse is computed
(circle: C = 8*eps0*R, P = 16/3*eps0*R^3), else that of the
completely filled grid. UseFFT is for increased speed.
Calculating G
Transforming G
Segmentation fault
Backtrace is
Exception Type: EXC_BAD_ACCESS (SIGSEGV)
Exception Codes: KERN_INVALID_ADDRESS at 0x0000000000000404
Crashed Thread: 0 Dispatch queue: com.apple.main-thread
Thread 0 Crashed: Dispatch queue: com.apple.main-thread
0 a.out 0x0000000100005230
__solv_cap_MOD_fourir2d + 3136
1 a.out 0x000000010000d580
__solv_cap_MOD_init_solve + 2512
2 a.out 0x000000010000ddaf MAIN__.2138 + 1647
3 a.out 0x000000010000e0b1 main + 33
4 a.out 0x0000000100000f24 start + 52
Note that '-fno-tree-vectorize' does not remove the crash, while it does not
occur with '-O2 -ftree-vectorize' (nor on powerpc-apple-darwin9 at revision
160686).
--
Summary: [4.6 Regression] Revision 160679 miscompiles
capacita.f90 with -O3 -finline-limit=600 -flto
Product: gcc
Version: 4.6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: lto
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: dominiq at lps dot ens dot fr
GCC build triplet: x86_64-apple-darwin10
GCC host triplet: x86_64-apple-darwin10
GCC target triplet: x86_64-apple-darwin10
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44533
