1 files changed, 33 insertions, 0 deletions
diff --git a/gcc/testsuite/gfortran.dg/chkbits.f90 b/gcc/testsuite/gfortran.dg/chkbits.f90
new file mode 100644
index 000000000..4652439fd
--- /dev/null
+++ b/gcc/testsuite/gfortran.dg/chkbits.f90
@@ -0,0 +1,33 @@
+! { dg-do run }
+! NOT() was not return the two's complement value as reported by
+! PR fortran/25458.  In checking other bit manipulation intrinsics,
+! IBSET was found to be in error.
+program chkbits
+
+  implicit none
+
+  integer(kind=1) i1
+  integer(kind=2) i2
+  integer(kind=4) i4
+  integer(kind=8) i8
+
+  i1 = ibset(huge(0_1), bit_size(i1)-1)
+  i2 = ibset(huge(0_2), bit_size(i2)-1)
+  i4 = ibset(huge(0_4), bit_size(i4)-1)
+  i8 = ibset(huge(0_8), bit_size(i8)-1)
+  if (i1 /= -1 .or. i2 /= -1 .or. i4 /= -1 .or. i8 /= -1) call abort
+
+  i1 = ibclr(-1_1, bit_size(i1)-1)
+  i2 = ibclr(-1_2, bit_size(i2)-1)
+  i4 = ibclr(-1_4, bit_size(i4)-1)
+  i8 = ibclr(-1_8, bit_size(i8)-1)
+  if (i1 /= huge(0_1) .or. i2 /= huge(0_2)) call abort
+  if (i4 /= huge(0_4) .or. i8 /= huge(0_8)) call abort
+
+  i1 = not(0_1)
+  i2 = not(0_2)
+  i4 = not(0_4)
+  i8 = not(0_8)
+  if (i1 /= -1 .or. i2 /= -1 .or. i4 /= -1 .or. i8 /= -1) call abort
+
+end program chkbits