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* tree-ssa-loop-ivcanon.c: New file.
authorrakdver <rakdver@138bc75d-0d04-0410-961f-82ee72b054a4>
Tue, 24 Aug 2004 20:48:23 +0000 (20:48 +0000)
committerrakdver <rakdver@138bc75d-0d04-0410-961f-82ee72b054a4>
Tue, 24 Aug 2004 20:48:23 +0000 (20:48 +0000)
commitbb445479def5c8fcb62ba57aa917feec3228322c
tree437eb45f8de15cfc88b0b52b021ad483bab2b80e
parent00b5c4a1dc915e2696b48e960b1d67272c83079a
* tree-ssa-loop-ivcanon.c: New file.
* tree-ssa-loop-manip.c (create_iv): New function.
* Makefile.in (tree-ssa-loop-ivcanon.o): Add.
(tree-ssa-loop.o, tree-ssa-loop-manip.o): Add SCEV_H dependency.
* cfgloop.c (mark_single_exit_loops): New function.
(verify_loop_structure): Verify single-exit loops.
* cfgloop.h (struct loop): Add single_exit field.
(LOOPS_HAVE_MARKED_SINGLE_EXITS): New constant.
(mark_single_exit_loops): Declare.
(tree_num_loop_insns): Declare.
* cfgloopmanip.c (update_single_exits_after_duplication): New function.
(duplicate_loop_to_header_edge): Use it.
* common.opt (fivcanon): New flag.
* timevar.def (TV_TREE_LOOP_IVCANON, TV_COMPLETE_UNROLL): New timevars.
* tree-cfg.c (tree_find_edge_insert_loc): Return newly created block.
(bsi_commit_edge_inserts_1): Pass null to tree_find_edge_insert_loc.
(bsi_insert_on_edge_immediate): New function.
* tree-flow.h (bsi_insert_on_edge_immediate,
canonicalize_induction_variables, tree_unroll_loops_completely,
create_iv): Declare.
* tree-optimize.c (init_tree_optimization_passes): Add
pass_iv_canon and pass_complete_unroll.
* tree-pass.h (pass_iv_canon, pass_complete_unroll): Declare.
* tree-scalar-evolution.c (get_loop_exit_condition,
get_exit_conditions_rec, number_of_iterations_in_loop,
scev_initialize): Use single_exit information.
* tree-ssa-loop-niter.c (number_of_iterations_cond): Record
missing assumptions.
(loop_niter_by_eval):  Return number of iterations as unsigned
int.
* tree-ssa-loop.c (tree_ssa_loop_init): Mark single exit loops.
(tree_ssa_loop_ivcanon, gate_tree_ssa_loop_ivcanon, pass_iv_canon,
tree_complete_unroll, gate_tree_complete_unroll, pass_complete_unroll):
New passes.
(tree_ssa_loop_done): Call free_numbers_of_iterations_estimates.
* tree-ssanames.c (make_ssa_name): Allow creating ssa name before
the defining statement is ready.
* tree-vectorizer.c (vect_create_iv_simple): Removed.
(vect_create_index_for_array_ref, vect_transform_loop_bound):
Use create_iv.
(vect_transform_loop_bound): Use single_exit information.
(vect_analyze_loop_form): Cleanup bogus tests.
(vectorize_loops): Do not call flow_loop_scan.
* tree.h (may_negate_without_overflow_p): Declare.
* fold-const.c (may_negate_without_overflow_p): Split out from ...
(negate_expr_p): ... this function.
(tree_expr_nonzero_p): Handle overflowed constants correctly.
* doc/invoke.texi (-fivcanon): Document.
* doc/passes.texi: Document canonical induction variable creation.

* gcc.dg/tree-ssa/loop-1.c: New test.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@86516 138bc75d-0d04-0410-961f-82ee72b054a4
24 files changed:
gcc/ChangeLog
gcc/Makefile.in
gcc/cfgloop.c
gcc/cfgloop.h
gcc/cfgloopmanip.c
gcc/common.opt
gcc/doc/invoke.texi
gcc/doc/passes.texi
gcc/fold-const.c
gcc/testsuite/ChangeLog
gcc/testsuite/gcc.dg/tree-ssa/loop-1.c [new file with mode: 0644]
gcc/timevar.def
gcc/tree-cfg.c
gcc/tree-flow.h
gcc/tree-optimize.c
gcc/tree-pass.h
gcc/tree-scalar-evolution.c
gcc/tree-ssa-loop-ivcanon.c [new file with mode: 0644]
gcc/tree-ssa-loop-manip.c
gcc/tree-ssa-loop-niter.c
gcc/tree-ssa-loop.c
gcc/tree-ssanames.c
gcc/tree-vectorizer.c
gcc/tree.h