Peter Klausler, a compiler developer at Nvidia, started a project
Other GitHub projects to test Fortran compilers, from my list, are
AdHoc: archives ad hoc tests for modern Fortran compilers used by Sourcery Institute, Sourcery, Inc., their collaborators, sponsors, and clients. These tests emphasize support for the Fortran 2003 and 2008 standards along with features proposed for Fortran 2015 in technical specification TS 29113 Further Interoperability with C and the draft technical specification TS 18508 Additional Parallel Features in Fortran.
FCVS_95: modified version of NIST F77 validation suite, updated for Fortran 95. The original is FCVS.
fortran-compiler-tests: collection of Fortran compiler bug examples and tests, by nncarlson
Fortran Tests: set of tests for Modern Fortran, by Galen M. Shipman
infnan: functions for checking Inf/NaN, Zaikun Zhang. They should work even if the compilers are invoked with aggressive optimization flags such as gfortran -Ofast.
paranoia: tests floating-point arithmetic in a Fortran programming environment, by urbanjost. This is a version of the netlib PARANOIA Fortran programs converted to procedures. They can be embedded into programs such that one can verify the behavior of the options selected to execute a program, or the simple test program can be used to experiment with various compiler selections.
test_compiler: tests the applicability of Fortran compilers in a project that develops optimization solvers, by Zhang Zaikun
test_nvfortran_20_11: source code test.f90 by vyu16 attempts to call getitem, defined in dummy_module.f90, incorrectly. Both ifort and gfortran are able to catch it at compile time. However, nvfortran compiles the code and seems to just ignore the call at run time.