re PR tree-optimization/38104 (ICE segmentation fault  (with -O3 when deref a NULL pointer in the code??))

	PR tree-optimization/38104
	* gimplify.c (gimple_regimplify_operands): Add referenced vars
	before calling mark_symbols_for_renaming, not after it.

	* g++.dg/tree-ssa/pr38104.C: New test.

From-SVN: r141857