[gcc]

2017-03-21  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>
            Richard Biener  <rguenth@suse.com>

	PR tree-optimization/79908
	* tree-stdarg.c (expand_ifn_va_arg_1): For a VA_ARG whose LHS has
	been cast away, use force_gimple_operand to construct the side
	effects.

[gcc/testsuite]

2017-03-21  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>
            Richard Biener  <rguenther@suse.de>

	PR tree-optimization/79908
	* gcc.dg/torture/pr79908.c: New file.


Co-Authored-By: Richard Biener <rguenth@suse.com>
Co-Authored-By: Richard Biener <rguenther@suse.de>

From-SVN: r246319