re PR tree-optimization/51988 (value_replacement in PHIOPT should handle even the cases where there are other PHIs even with non equal value)

2012-03-09  Andrew Pinski  <apinski@cavium.com>

	PR middle-end/51988
	* tree-ssa-phiopt.c: Include tree-pretty-print.h for
	print_generic_expr.
	(tree_ssa_phiopt_worker): Go through all the PHIs for
	value_replacement instead of just the singleton one.
	(value_replacement): Change return type to int.  Return 0 instead of
	false.
	Allow the middle basic block to contain more than just the definings
	tatement. 
	Handle non empty middle basic blocks.
	* Makefile.in (tree-ssa-phiopt.o): Add tree-pretty-print.h.

2012-03-09  Andrew Pinski  <apinski@cavium.com>

	PR middle-end/51988
	* gcc.dg/tree-ssa/phi-opt-8.c: New testcase.
	* gcc.dg/tree-ssa/phi-opt-9.c: New testcase.

From-SVN: r185131