This is with the Polyhedron rnflow.f90 test case
(http://www.polyhedron.co.uk/pb05/polyhedron_benchmark_suite.html)
It was working on 2007-04-23 (should be r124055) and started to fail since
2007-04-24 (should be r124093). (Same with PR 31697)
Crash after 1.5 seconds with
gfortran -m32 -march=opteron -ftree-vectorize -O2 rnflow.f90
Same crash with -m64.
no crash:
- without: -march=opteron
- without: -ftree-vectorize
- with: -O1
Program received signal SIGSEGV, Segmentation fault.
#0 0x00000000004058a9 in invima (__result=<value optimized out>,
a=0x2ac0ff48d010, [EMAIL PROTECTED], k=<value optimized out>,
[EMAIL PROTECTED]) at rnflow.f90:2904
#1 0x0000000000407446 in evlrnf_ (ptrs0t=<value optimized out>, nclsm=<value
optimized out>, prnf0t=0xdaf380) at rnflow.f90:2771
2899 elseif (n > 1) then
2900 allocate (da (1:n,1:n))
2901 lw = n * m
2902 allocate (dw (1:lw))
2903 allocate (ipivt (1:n))
2904 da (1:n, 1:n) = - a (j:k-1, j:k-1)
2905 do i = 1, n
2906 da (i, i) = da (i, i) + 1.0d0
2907 enddo
--
Summary: [Regression 4.3] -march=opteron -ftree-vectorize
generates wrong code
Product: gcc
Version: 4.3.0
Status: UNCONFIRMED
Keywords: wrong-code
Severity: normal
Priority: P3
Component: middle-end
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: burnus at gcc dot gnu dot org
GCC target triplet: x86_64-unknown-linux-gnu
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31699
