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gcc/gcc ChangeLog.tree-ssa common. ...

CVSROOT:	/cvs/gcc
Module name:	gcc
Branch: 	tree-ssa-20020619-branch
Changes by:	2004-01-07 23:44:18

Modified files:
	gcc            : ChangeLog.tree-ssa common.opt 
	                 flags.h opts.c timevar.def toplev.c 
	                 tree-alias-common.c tree-dfa.c tree-dump.c 
	                 tree-flow-inline.h tree-flow.h tree-optimize.c 
	                 tree-ssa-dom.c tree-ssa-operands.c tree-ssa.c 
	gcc/doc        : invoke.texi 
	gcc/testsuite  : ChangeLog.tree-ssa 
	gcc/testsuite/gcc.dg/tree-ssa: 20030530-2.c 20030611-1.c 
	                               20030703-1.c 20030703-2.c 
	                               20030708-1.c 20030709-2.c 
	                               20030709-3.c 20030710-1.c 
	                               20030711-1.c 20030711-2.c 
	                               20030711-3.c 20030714-1.c 
	                               20030714-2.c 20030729-1.c 
	                               20030730-1.c 20030730-2.c 
	                               20030731-1.c 20030807-1.c 
	                               20030807-10.c 20030807-11.c 
	                               20030807-2.c 20030807-3.c 
	                               20030807-4.c 20030807-5.c 
	                               20030807-6.c 20030807-7.c 
	                               20030807-8.c 20030807-9.c 
	                               20030808-1.c 20030814-1.c 
	                               20030814-2.c 20030814-3.c 
	                               20030814-4.c 20030814-5.c 
	                               20030814-6.c 20030814-7.c 
	                               20030815-1.c 20030922-1.c 
Removed files:
	gcc            : tree-must-alias.c 

Log message:
	* (OBJS-common): Remove tree-must-alias.o
	(tree-must-alias.o): Remove.
	* common.opt (ftree-must-alias): Remove.
	* flags.h (flag_tree_must_alias): Remove.  Update all users.
	* timevar.def (TV_TREE_MUST_ALIAS): Remove.
	* toplev.c (f_options): Remove entry for -ftree-must-alias.
	* tree-alias-common.c (local_alias_vars): Add GTY marker.
	(local_alias_varnums): Likewise.
	* tree-dfa.c (aliases_computed_p): Declare.
	(dump_variable): Show variable UID and dereferenced bits.
	(compute_may_aliases): Add arguments 'vars_to_rename' and 'phase'.
	Do not call create_alias_vars.
	Call promote_call_clobbered_vars
	Do debugging dumps.
	Set 'aliases_computed_p' to true before returning.
	(create_memory_tags): Call may_be_aliased.
	Mark new memory tags for renaming.
	(compute_alias_sets): Don't do debugging dumps.
	(find_variable_in): Move from tree-must-alias.c
	(remove_element_from): Likewise.
	(find_addressable_vars): Likewise
	(promote_call_clobbered_vars): New.
	(get_memory_tag_for): Mark the tag volatile if the pointed-to type
	is volatile.
	* tree-dump.c (dump_files): Remove entry for tree-mustalias.
	Add entries for tree-ssa7, tree-dom3 and tree-dce3.
	* tree-flow-inline.h (may_be_aliased): New.
	* tree-flow.h (may_be_aliased): Declare.
	(aliases_computed_p): Declare.
	(tree_compute_must_alias): Remove.
	* tree-must-alias.c: Remove.
	* tree-optimize.c: Include tree-alias-common.h.
	(optimize_function_tree): Call create_alias_vars before going into
	SSA form.
	Do not compute aliases until after the first DOM and DCE passes.
	Run DOM and DCE once more after computing may-aliases.
	* tree-ssa-dom.c (propagate_copy): Merge the dereferenced bit flags
	when copy propagating pointers.
	* tree-ssa-operands.c (get_stmt_operands): Assume that the
	statement has no volatile operands.
	(get_expr_operands): When processing an INDIRECT_REF expressions,
	mark the statement as having volatile operands if aliases have not
	been computed.
	(add_stmt_operand): If the variable may be aliased and aliasing has
	not been computed yet, mark the statement as having volatile
	* tree-ssa.c (init_tree_ssa): Set aliases_computed_p to false.
	(delete_tree_ssa): Likewise.
	* tree.h (tree_dump_index): Remove TDI_mustalias.
	Add TDI_dom_3, TDI_ssa_7 and TDI_dce_3.
	* doc/invoke.texi: Remove must-alias documentation.
	* gcc.dg/tree-ssa/20030530-2.c: Adjust dump file patterns.
	* gcc.dg/tree-ssa/20030611-1.c: Likewise.
	* gcc.dg/tree-ssa/20030703-1.c: Likewise.
	* gcc.dg/tree-ssa/20030703-2.c: Likewise.
	* gcc.dg/tree-ssa/20030708-1.c: Likewise.
	* gcc.dg/tree-ssa/20030709-2.c: Likewise.
	* gcc.dg/tree-ssa/20030709-3.c: Likewise.
	* gcc.dg/tree-ssa/20030710-1.c: Likewise.
	* gcc.dg/tree-ssa/20030711-1.c: Likewise.
	* gcc.dg/tree-ssa/20030711-2.c: Likewise.
	* gcc.dg/tree-ssa/20030711-3.c: Likewise.
	* gcc.dg/tree-ssa/20030714-1.c: Likewise.
	* gcc.dg/tree-ssa/20030714-2.c: Likewise.
	* gcc.dg/tree-ssa/20030729-1.c: Likewise.
	* gcc.dg/tree-ssa/20030730-1.c: Likewise.
	* gcc.dg/tree-ssa/20030730-2.c: Likewise.
	* gcc.dg/tree-ssa/20030731-1.c: Likewise.
	* gcc.dg/tree-ssa/20030807-10.c: Likewise.
	* gcc.dg/tree-ssa/20030807-11.c: Likewise.
	* gcc.dg/tree-ssa/20030807-2.c: Likewise.
	* gcc.dg/tree-ssa/20030807-3.c: Likewise.
	* gcc.dg/tree-ssa/20030807-4.c: Likewise.
	* gcc.dg/tree-ssa/20030807-5.c: Likewise.
	* gcc.dg/tree-ssa/20030807-6.c: Likewise.
	* gcc.dg/tree-ssa/20030807-7.c: Likewise.
	* gcc.dg/tree-ssa/20030807-8.c: Likewise.
	* gcc.dg/tree-ssa/20030807-9.c: Likewise.
	* gcc.dg/tree-ssa/20030808-1.c: Likewise.
	* gcc.dg/tree-ssa/20030814-1.c: Likewise.
	* gcc.dg/tree-ssa/20030814-2.c: Likewise.
	* gcc.dg/tree-ssa/20030814-3.c: Likewise.
	* gcc.dg/tree-ssa/20030814-4.c: Likewise.
	* gcc.dg/tree-ssa/20030814-5.c: Likewise.
	* gcc.dg/tree-ssa/20030814-6.c: Likewise.
	* gcc.dg/tree-ssa/20030814-7.c: Likewise.
	* gcc.dg/tree-ssa/20030815-1.c: Likewise.
	* gcc.dg/tree-ssa/20030922-1.c: Likewise.
	* gcc.dg/tree-ssa/20030807-1.c: Likewise.
	Fix test to avoid dereferencing a NULL pointer.


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