re PR target/57949 ([powerpc64] Structure parameter alignment issue with vector exten...

re PR target/57949 ([powerpc64] Structure parameter alignment issue with vector extensions)

gcc:

2013-08-14  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>

	PR target/57949
	* doc/invoke.texi: Add documentation of mcompat-align-parm
	option.
	* config/rs6000/rs6000.opt: Add mcompat-align-parm option.
	* config/rs6000/rs6000.c (rs6000_function_arg_boundary): For AIX
	and Linux, correct BLKmode alignment when 128-bit alignment is
	required and compatibility flag is not set.
	(rs6000_gimplify_va_arg): For AIX and Linux, honor specified
	alignment for zero-size arguments when compatibility flag is not
	set.

gcc/testsuite:

2013-08-14  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>

	PR target/57949
	* gcc.target/powerpc/pr57949-1.c: New.
	* gcc.target/powerpc/pr57949-2.c: New.

From-SVN: r201750