https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92321
Bug ID: 92321
Summary: GCC 9.2.0 ICE: fexternal-blas with optimization
Product: gcc
Version: 9.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
Reporter: bugreports.nwukie at gmail dot com
Target Milestone: ---
I experience an ICE with gfortran 9.2.0 compiling a matmul call within a
subroutine using -fexternal-blas and -O3. Compiling without -fexternal-blas the
compilation completes without failing. It looks like there were some recent
modifications related to matmul optimizations that went into GCC9 as mentioned
in https://gcc.gnu.org/bugzilla/show_bug.cgi?id=29550
INPUT: (test.f90)
module mod_badmatmul
implicit none
contains
subroutine test(c)
real, intent(inout) :: c(3,3)
real :: a(3,3), b(3,3)
c = matmul(a, b)
end subroutine test
end module mod_badmatmul
program main
use mod_badmatmul, only: test
implicit none
real :: a(3,3)
call test(a)
end program main
COMPILE LINE:
gfortran -fexternal-blas -O3 test.f90
OUTPUT:
f951: internal compiler error: in gfc_enforce_clean_symbol_state, at
fortran/symbol.c:4273
libbacktrace could not find executable to open
SYSTEM:
OSX 10.14.6
Target: x86_64-apple-darwin18.7.0
Configured with: ./configure --enable-languages=c,c++,fortran
Thread model: posix
gcc version 9.2.0 (GCC)
GNU Fortran (GCC) version 9.2.0 (x86_64-apple-darwin18.7.0)
compiled by GNU C version 9.2.0, GMP version 6.1.0, MPFR version 3.1.4,
MPC version 1.0.3, isl version isl-0.18-GMP
GNU Fortran2008 (GCC) version 9.2.0 (x86_64-apple-darwin18.7.0)
compiled by GNU C version 9.2.0, GMP version 6.1.0, MPFR version 3.1.4,
MPC version 1.0.3, isl version isl-0.18-GMP
