trans-intrinsic.c (gfc_conv_intrinsic_ishft): Change to logicalshift.

trans-intrinsic.c (gfc_conv_intrinsic_ishft): Change to logicalshift.

gcc/fortran/
* trans-intrinsic.c (gfc_conv_intrinsic_ishft): Change to
logicalshift.  Call fold.  Remove 0-bit shift shortcut.
(gfc_conv_intrinsic_ishftc): Convert first argument to at least
4 bytes bits.  Convert 2nd and 3rd argument to 4 bytes.  Convert
result if width(arg 1) < 4 bytes.  Call fold.

libgfortran/
* libgfortran/libgfortran.h (GFC_UINTEGER_1, GFC_UINTEGER_2):
Define.
* intrinsics/ishftc.c: Update copyright years.
(ishftc8): Change 'shift' and 'size' to GFC_INTEGER_4.
* intrinsics/mvbits.c: Correcty non-ASCII character in my name.
Add implementations for GFC_INTEGER_1 and GFC_INTEGER_2.

gcc/testsuite/
* gfortran.dg/g77/f90-intrinsic-bit.f: New.

From-SVN: r92642