1 files changed, 46 insertions, 0 deletions
diff --git a/gcc/testsuite/gfortran.dg/nan_3.f90 b/gcc/testsuite/gfortran.dg/nan_3.f90
new file mode 100644
index 000000000..0a46fdb6c
--- /dev/null
+++ b/gcc/testsuite/gfortran.dg/nan_3.f90
@@ -0,0 +1,46 @@
+! { dg-do run }
+! { dg-options "-fno-range-check" }
+! { dg-add-options ieee }
+! { dg-skip-if "NaN not supported" { spu-*-* } { "*" } { "" } }
+!
+! PR fortran/34319
+!
+! Check support of INF/NaN for I/O.
+!
+program main
+  implicit none
+  real :: r
+  complex :: z
+  character(len=30) :: str
+
+  str = "nan"
+  read(str,*) r
+  if (.not.isnan(r)) call abort()
+  str = "(nan,4.0)"
+  read(str,*) z
+  if (.not.isnan(real(z)) .or. aimag(z) /= 4.0) call abort()
+  str = "(7.0,nan)"
+  read(str,*) z
+  if (.not.isnan(aimag(z)) .or. real(z) /= 7.0) call abort()
+
+  str = "inFinity"
+  read(str,*) r
+  if (r <= huge(r)) call abort()
+  str = "(+inFinity,4.0)"
+  read(str,*) z
+  if ((real(z) <= huge(r)) .or. aimag(z) /= 4.0) call abort()
+  str = "(7.0,-inFinity)"
+  read(str,*) z
+  if ((aimag(z) >= -huge(r)) .or. real(z) /= 7.0) call abort()
+
+  str = "inf"
+  read(str,*) r
+  if (r <= huge(r)) call abort()
+  str = "(+inf,4.0)"
+  read(str,*) z
+  if ((real(z) <= huge(r)) .or. aimag(z) /= 4.0) call abort()
+  str = "(7.0,-inf)"
+  read(str,*) z
+  if ((aimag(z) >= -huge(r)) .or. real(z) /= 7.0) call abort()
+
+end program main