re PR fortran/90577 (FAIL: gfortran.dg/lrshift_1.f90 with -O(2|3) and -flto)

re PR fortran/90577 (FAIL: gfortran.dg/lrshift_1.f90 with -O(2|3) and -flto)

2019-06-14  Harald Anlauf  <anlauf@gmx.de>

	PR fortran/90577
	PR fortran/90578
	* trans-intrinsic.c (gfc_conv_intrinsic_shift): Properly
	distinguish logical/arithmetic shifts.
	* intrinsic.texi: Update documentation for SHIFTR/SHIFTL/SHIFTA
	(Fortran 2008) and LSHIFT/RSHIFT (GNU extensions).

	PR fortran/90577
	PR fortran/90578
	* gfortran.dg/lrshift_1.f90: Adjust testcase.
	* gfortran.dg/shiftalr_3.f90: New testcase.

From-SVN: r272309