1 files changed, 30 insertions, 0 deletions
diff --git a/gcc/testsuite/gfortran.dg/module_nan.f90 b/gcc/testsuite/gfortran.dg/module_nan.f90
new file mode 100644
index 000000000..202781f07
--- /dev/null
+++ b/gcc/testsuite/gfortran.dg/module_nan.f90
@@ -0,0 +1,30 @@
+! { dg-do run }
+! { dg-options "-fno-range-check" }
+! { dg-add-options ieee }
+! { dg-skip-if "NaN not supported" { spu-*-* } { "*" } { "" } }
+!
+! PR fortran/34318
+!
+! Infinity and NaN were not properly written to the .mod file.
+!
+module nonordinal
+  implicit none
+  real, parameter :: inf = 1./0., nan = 0./0., minf = -1./0.0
+end module nonordinal
+
+program a
+  use nonordinal
+  implicit none
+  character(len=20) :: str
+  if (log(abs(inf))  < huge(inf)) call abort()
+  if (log(abs(minf)) < huge(inf)) call abort()
+  if (.not. isnan(nan)) call abort()
+  write(str,"(sp,f10.2)") inf
+  if (adjustl(str) /= "+Infinity") call abort()
+  write(str,*) minf
+  if (adjustl(str) /= "-Infinity") call abort()
+  write(str,*) nan
+  if (adjustl(str) /= "NaN") call abort()
+end program a
+
+! { dg-final { cleanup-modules "nonordinal" } }