re PR tree-optimization/57370 (compiler hangs in reassoc)

re PR tree-optimization/57370 (compiler hangs in reassoc)

2013-09-04  Easwaran Raman  <eraman@google.com>

	PR middle-end/57370
	PR tree-optimization/58011
	* tree-ssa-reassoc.c (get_stmt_uid_with_default): New function,
	(build_and_add_sum): Use it.
	(appears_later_in_bb): Simplify code.

gcc/testsuite/ChangeLog:
2013-09-04  Easwaran Raman  <eraman@google.com>

	PR middle-end/57370
	PR tree-optimization/58011
	* gfortran.dg/reassoc_12.f90: New testcase.
	* gcc.dg/tree-ssa/reassoc-31.c: New testcase.

From-SVN: r202262