2005-03-01 Daniel Berlin <dberlin@dberlin.org>
* Makefile.in (tree-ssa-sink.o): New.
(OBJS-common): Add tree-ssa-sink.o.
* common.opt: Add -ftree-sink
* opts.c (decode_options): flag_tree_sink is set at O1 or higher.
* timevar.def (TV_TREE_SINK): new timevar.
* tree-flow.h (is_hidden_global_store): Prototype.
* tree-optimize.c (init_tree_optimization_passes): Add
pass_sink_code.
* tree-pass.h (pass_sink_code): New.
* tree-ssa-dce.c (mark_stmt_if_obviously_necessary): Move checking
for non-obvious global store store to is_hidden_global_store, and
call that new function.
* tree-ssa-sink.c: New file.
* doc/invoke.texi: Document -fdump-tree-sink and -ftree-sink.
* doc/passes.texi: Document forward store motion.
* testsuite/gcc.dg/tree-ssa/ssa-sink-1.c: New test
* testsuite/gcc.dg/tree-ssa/ssa-sink-2.c: New test
* testsuite/gcc.dg/tree-ssa/ssa-sink-3.c: New test
* testsuite/gcc.dg/tree-ssa/ssa-sink-4.c: New test
From-SVN: r95750
