r217034 - in /trunk/gcc: ChangeLog testsuite/Ch...

[glisse at gcc dot gnu dot org]

Author: glisse
Date: Mon Nov  3 10:47:04 2014
New Revision: 217034

URL: https://gcc.gnu.org/viewcvs?rev=217034&root=gcc&view=rev
Log:
2014-11-03  Marc Glisse  <marc.glisse@inria.fr>

	PR tree-optimization/60770
gcc/
	* tree-into-ssa.c (rewrite_update_stmt): Return whether the
	statement should be removed.
	(maybe_register_def): Likewise. Replace clobbers with default
	definitions.
	(rewrite_dom_walker::before_dom_children): Remove statement if
	rewrite_update_stmt says so.
	* tree-ssa-live.c: Include tree-ssa.h.
	(set_var_live_on_entry): Do not mark undefined variables as live.
	(verify_live_on_entry): Do not check undefined variables.
	* tree-ssa.h (ssa_undefined_value_p): New parameter for the case
	of partially undefined variables.
	* tree-ssa.c (ssa_undefined_value_p): Likewise.
	(execute_update_addresses_taken): Do not drop clobbers.

gcc/testsuite/
	* gcc.dg/tree-ssa/pr60770-1.c: New file.


Added:
    trunk/gcc/testsuite/gcc.dg/tree-ssa/pr60770-1.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-into-ssa.c
    trunk/gcc/tree-ssa-live.c
    trunk/gcc/tree-ssa.c
    trunk/gcc/tree-ssa.h