re PR tree-optimization/71132 (gcc ICE at -O3 on valid code on x86_64-linux-gnu with...

re PR tree-optimization/71132 (gcc ICE at -O3 on valid code on x86_64-linux-gnu with “seg fault”)

2016-05-17  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/71132
	* tree-loop-distribution.c (create_rdg_cd_edges): Pass in loop.
	Only add control dependences for blocks in the loop.
	(build_rdg): Adjust.
	(generate_code_for_partition): Return whether loop should
	be destroyed and delay that.
	(distribute_loop): Likewise.
	(pass_loop_distribution::execute): Record loops to be destroyed
	and perform delayed destroying of loops.

	* gcc.dg/torture/pr71132.c: New testcase.

From-SVN: r236320