gcc/gcc ChangeLog.tree-ssa Makefile.in flags.h ...
dnovillo@gcc.gnu.org
dnovillo@gcc.gnu.org
Mon Jul 14 21:18:00 GMT 2003
CVSROOT: /cvs/gcc
Module name: gcc
Branch: tree-ssa-20020619-branch
Changes by: dnovillo@gcc.gnu.org 2003-07-14 21:18:52
Modified files:
gcc : ChangeLog.tree-ssa Makefile.in flags.h
timevar.def toplev.c tree-cfg.c tree-dfa.c
tree-dump.c tree-flow-inline.h tree-flow.h
tree-inline.c tree-optimize.c tree-simple.c
tree-ssa-ccp.c tree-ssa-copyprop.c
tree-ssa-dce.c tree-ssa.c tree.h
gcc/cp : optimize.c
gcc/doc : invoke.texi
Added files:
gcc : tree-must-alias.c
Log message:
Must alias analysis. Allow the SSA rename pass to be done on a set
of variables.
* Makefile.in (OBJS): Add tree-must-alias.o.
* flags.h (flag_tree_must_alias): Declare.
* timevar.def (TV_TREE_MUST_ALIAS): Define.
* toplev.c (flag_tree_must_alias): Declare.
(f_options): Add entry for -ftree-must-alias.
(parse_options_and_default_flags): Enable must-alias analysis at -O1.
* tree-cfg.c (remove_useless_stmts_and_vars): Do not remove
addressable variables.
* tree-dfa.c (dump_file, dump_flags): New local variables to
replace tree_ssa_dump_file and tree_ssa_dump_flags. Update every
user.
(get_stmt_operands): Clear the array of virtual operands before
scanning the statement.
(get_expr_operands): Do not add an operand for ADDR_EXPR if the
expression takes the address of a VAR_DECL or a PARM_DECL. Instead
add the variable to the list of variables whose address has been
taken by the statement.
Allow INDIRECT_REF expressions of the form *&VAR. Convert them
into an operand for VAR.
When processing function calls, add a VUSE for .GLOBAL_VAR if the
function is pure but not const.
(add_stmt_operand): If the operand is an ADDR_EXPR, add the
variable to the list of variables whose address has been taken by
the statement.
(add_vdef): If the statement had virtual definitions, try to find
an existing VDEF for the variable, to preserve SSA information. If
none is found, create a new one.
(add_vuse): Likewise.
(remove_all_phi_nodes_for): New function.
(get_call_flags): New function to replace call_may_clobber. Update
all callers.
* tree-dump.c (dump_files): Add entry for -fdump-tree-mustalias.
* tree-flow-inline.h (addresses_taken): New function.
(is_unchanging_value): New function.
* tree-flow.h (addresses_taken): Declare.
(remove_all_phi_nodes): Declare.
(init_tree_ssa): Declare.
(propagate_copy): Declare.
(is_unchanging_value): Declare.
(tree_compute_must_alias): Declare.
* tree-inline.c (copy_body_r): Fold instances of *&VAR.
* tree-must-alias.c: New file.
* tree-optimize.c (optimize_function_tree): Call init_tree_ssa and
compute_may_aliases before calling rewrite_into_ssa.
After the SSA pass, run dead code elimination and compute
must-aliases.
* tree-simple.c (is_gimple_call_expr): Add comment that
is_gimple_* predicates should not have side effects.
* tree-ssa-ccp.c: Replace calls to really_constant_p with
is_unchanging_value everywhere.
(fold_stmt): Don't fold if the RHS is already a constant.
* tree-ssa-copyprop.c (copyprop_stmt): Remove unnecessary
variable 'vuse'.
Call propagate_copy to replace the operand with its new value.
(copyprop_phi): Remove unnecessary variable 'vuse'.
(get_original): Remove unused parameter 'vuse_p'.
(propagate_copy): New function.
* tree-ssa-dce.c (need_to_preserve_store): Update comments.
* tree-ssa.c (dump_file, dump_flags): New local variables to
replace globals tree_ssa_dump_file and tree_ssa_dump_flags. Update
all users.
(addr_expr_propagated_p): New local variable.
(vars_to_rename): New local variable.
(check_for_new_variables): New local function.
(rewrite_into_ssa): Add new argument VARS which is a bitmap
representing all the variables that should be renamed into SSA. If
VARS is NULL, all the variables in the program are renamed.
Don't call init_tree_ssa nor compute_may_aliases.
Initialize all the local hash tables and bitmaps.
Add support for repeating the SSA rename process more than once.
If the dominator optimizations produced new symbols, repeat the
process.
(mark_def_sites): Ignore operands that are in SSA form already.
(insert_phi_nodes): Only add PHI nodes for variables in the
VARS_TO_RENAME bitmap.
(rewrite_block): Ignore PHI nodes that have been renamed already.
(rewrite_and_optimize_stmt): Ignore operands that are already in
SSA form.
When propagating ADDR_EXPR set addr_expr_propagated_p to 'true'.
Call propagate_copy when doing copy propagation.
Call is_unchanging_value to decide if the RHS of an assignment is a
constant.
(rewrite_stmt): Ignore operands that are already in SSA form.
(init_tree_ssa): Make external.
Move initialization of local hash tables and bitmaps to
rewrite_into_ssa.
(remove_annotations_r): Don't special case MODIFY_EXPR nodes.
(lookup_avail_expr): Call is_unchanging_value.
(get_eq_expr_value): Likewise.
* tree.h (enum tree_dump_index): Add TDI_must_alias.
* cp/optimize.c (optimize_function): Don't call the tree optimizers
if -fdisable-tree-ssa is given.
* doc/invoke.texi: Add documentation for -ftree-must-alias.
Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/tree-must-alias.c.diff?cvsroot=gcc&only_with_tag=tree-ssa-20020619-branch&r1=NONE&r2=1.1.2.1
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/ChangeLog.tree-ssa.diff?cvsroot=gcc&only_with_tag=tree-ssa-20020619-branch&r1=1.1.2.484&r2=1.1.2.485
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/Makefile.in.diff?cvsroot=gcc&only_with_tag=tree-ssa-20020619-branch&r1=1.903.2.97&r2=1.903.2.98
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/flags.h.diff?cvsroot=gcc&only_with_tag=tree-ssa-20020619-branch&r1=1.86.2.28&r2=1.86.2.29
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/timevar.def.diff?cvsroot=gcc&only_with_tag=tree-ssa-20020619-branch&r1=1.14.2.14&r2=1.14.2.15
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/toplev.c.diff?cvsroot=gcc&only_with_tag=tree-ssa-20020619-branch&r1=1.654.2.57&r2=1.654.2.58
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/tree-cfg.c.diff?cvsroot=gcc&only_with_tag=tree-ssa-20020619-branch&r1=1.1.4.126&r2=1.1.4.127
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/tree-dfa.c.diff?cvsroot=gcc&only_with_tag=tree-ssa-20020619-branch&r1=1.1.4.126&r2=1.1.4.127
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/tree-dump.c.diff?cvsroot=gcc&only_with_tag=tree-ssa-20020619-branch&r1=1.6.2.28&r2=1.6.2.29
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/tree-flow-inline.h.diff?cvsroot=gcc&only_with_tag=tree-ssa-20020619-branch&r1=1.1.2.39&r2=1.1.2.40
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/tree-flow.h.diff?cvsroot=gcc&only_with_tag=tree-ssa-20020619-branch&r1=1.1.4.88&r2=1.1.4.89
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/tree-inline.c.diff?cvsroot=gcc&only_with_tag=tree-ssa-20020619-branch&r1=1.26.2.33&r2=1.26.2.34
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/tree-optimize.c.diff?cvsroot=gcc&only_with_tag=tree-ssa-20020619-branch&r1=1.1.4.39&r2=1.1.4.40
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/tree-simple.c.diff?cvsroot=gcc&only_with_tag=tree-ssa-20020619-branch&r1=1.1.4.43&r2=1.1.4.44
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/tree-ssa-ccp.c.diff?cvsroot=gcc&only_with_tag=tree-ssa-20020619-branch&r1=1.1.2.75&r2=1.1.2.76
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/tree-ssa-copyprop.c.diff?cvsroot=gcc&only_with_tag=tree-ssa-20020619-branch&r1=1.1.2.5&r2=1.1.2.6
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/tree-ssa-dce.c.diff?cvsroot=gcc&only_with_tag=tree-ssa-20020619-branch&r1=1.1.2.44&r2=1.1.2.45
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/tree-ssa.c.diff?cvsroot=gcc&only_with_tag=tree-ssa-20020619-branch&r1=1.1.4.100&r2=1.1.4.101
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/tree.h.diff?cvsroot=gcc&only_with_tag=tree-ssa-20020619-branch&r1=1.342.2.75&r2=1.342.2.76
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cp/optimize.c.diff?cvsroot=gcc&only_with_tag=tree-ssa-20020619-branch&r1=1.81.10.22&r2=1.81.10.23
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/doc/invoke.texi.diff?cvsroot=gcc&only_with_tag=tree-ssa-20020619-branch&r1=1.152.2.45&r2=1.152.2.46
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