re PR middle-end/53695 (ICE: in dfs_enumerate_from, at cfganal.c:1221 with -O2 -ftracer and labels/gotos)

2012-10-29  Richard Guenther  <rguenther@suse.de>

	PR middle-end/53695
	* tracer.c (tracer): Fixup loop structure.
	* cfgloopmanip.c (force_single_succ_latches): Add assert.
	(fix_loop_structure): Re-compute loop latches and disambiguate
	loops with multiple latches if required.

	* gcc.dg/torture/pr53695.c: New testcase.

From-SVN: r192943