https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80965
Bug ID: 80965
Summary: ICE with class argument and -O2 optimization
Product: gcc
Version: 7.0.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
Reporter: david.sagan at gmail dot com
Target Milestone: ---
Consider the code:
module mode3_mod
contains
subroutine xyz(loc)
implicit none
class(*) :: loc
real X(6)
integer ix_use
select type (loc)
type is (integer)
x = 0
type is (real)
ix_use = 0
end select
end subroutine xyz
end module mode3_mod
Compiling with -O2 optimization gives an error:
Davids-Mac-mini:~/Bmad/test> gfortran -c -O2 mode3_mod.f90
mode3_mod.f90:24:0:
end subroutine xyz
internal compiler error: in compare_values_warnv, at tree-vrp.c:1223
mode3_mod.f90:24:0: internal compiler error: Abort trap: 6
gfortran: internal compiler error: Abort trap: 6 (program f951)
I am running on a Mac (10.12.5) with gcc version:
gcc (MacPorts gcc7 7-20170420_0) 7.0.1 20170420 (prerelease)
