2014-06-24  Marc Glisse  <marc.glisse@inria.fr>

	PR tree-optimization/57742
gcc/
	* tree-ssa-strlen.c (get_string_length): Ignore malloc.
	(handle_builtin_malloc, handle_builtin_memset): New functions.
	(strlen_optimize_stmt): Call them.
	* passes.def: Move strlen after loop+dom but before vrp.
gcc/testsuite/
	* g++.dg/tree-ssa/calloc.C: New testcase.
	* gcc.dg/tree-ssa/calloc-1.c: Likewise.
	* gcc.dg/tree-ssa/calloc-2.c: Likewise.
	* gcc.dg/strlenopt-9.c: Adapt.

From-SVN: r211956