https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91671
Bug ID: 91671
Summary: [10 Regression] gfortran.dg/direct_io_10.f fails at
runtime with -O3
Product: gcc
Version: 10.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
Reporter: janus at gcc dot gnu.org
Target Milestone: ---
Running the gfortran testsuite on today's trunk I see:
FAIL: gfortran.dg/direct_io_10.f -O3 -fomit-frame-pointer -funroll-loops
-fpeel-loops -ftracer -finline-functions execution test
FAIL: gfortran.dg/direct_io_10.f -O3 -g execution test
In particular the test case seems to fail with -O3, but not with -O2:
$ gfortran-10 -O3 direct_io_10.f
$ ./a.out
STOP 3
$ gfortran-10 -O2 direct_io_10.f
$ ./a.out
$
This is on Ubuntu 19.04 (x86_64) and my configure line includes
"--with-arch=haswell".
