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See PR30252 comment #30 for bug analysis and a patch.
Revision 125997 also fails at -O2 on Linux/x86-64 and the 4.2 patch
for PR 30252 fixes this bug for 4.3.
Subject: Bug 32303
Date: Sun Aug 19 23:23:29 2007
New Revision: 127629
2007-08-19 Daniel Berlin <email@example.com>
Fix PR 32772
Fix PR 32716
Fix PR 32328
Fix PR 32303
* tree-flow.h (struct stmt_ann_d): Remove makes_clobbering_call.
* tree-ssa-alias.c (init_transitive_clobber_worklist): Add
on_worklist argument and avoid adding things to worklist multiple
(mark_aliases_call_clobbered): Mark entire structure clobbered if
single SFT is clobbered.
(compute_call_clobbered): Update for changes to function
(create_overlap_variables_for): Always create SFT for offset 0.
(create_structure_vars): Handle PHI's, since we are in SSA form at
* tree-ssa-loop-ivopts.c (get_ref_tag): Don't return subvars.
* tree-ssa-operands.c (access_can_touch_variable): Don't handle
(add_vars_for_offset): Figure out aliases from access + points-to.
(add_virtual_operand): Use add_vars-for_offset.
(get_tmr_operands): Update for NMT changes, rewrite to be correct.
(add_call_clobber_ops): Remove makes_clobbering_call set.
(get_expr_operands): Always pass through the INDIRECT_REF
* tree-ssa-structalias.c (struct constraint_graph): Remove
Add pe, pe_rep, pointer_label, loc_label, pointed_by, points_to,
address_taken, pt_used, number_incoming.
(merge_graph_nodes): Remove broken code for the moment.
(init_graph): New function.
(build_pred_graph): Remove code to init_graph.
Add location equivalence support.
(struct scc_info): Rename roots to deleted.
(init_topo_info): Use graph->size.
(do_sd_constraint): Remove calls to find().
set_union_with_increment should always get 0 as last arg here.
(do_complex_constraint): Replace do_da_constraint with assert.
Stop calling find.
(struct equiv_class_label): New.
(condense_visit): Rename and rewrite from label_visit to do only
SCC related stuff for HU.
(label_visit): Do HU work for HU.
(perform_var_substitution): Update to do HU and location
(free_var_substitution_info): Update to free HU and location
equivalence structures. */
(find_equivalent_node): Update for pointer but not location
(unite_pointer_equivalences): New function.
(move_complex_constraints): Rewrite to only do moving.
(rewrite_constraints): Split out of move_complex_constraints.
(solve_graph): Use graph->size.
(process_constraint_1): Add from_call argument, use it.
Split *a = &b into two constraints.
(process_constraint): Use new process_constraint_1.
(get_constraint_for_component_ref): Handle bitmaxsize == -1 case.
(get_constraint_for): Handle non-pointer integers properly.
Remove code that used to handle structures.
(handle_ptr_arith): Fix a few bugs in pointer arithmetic handling
with unknown addends.
(handle_rhs_call): New function.
(find_func_aliases): Use handle_rhs_call.
(set_uids_in_ptset): Add an assert.
(set_used_smts): Fix bug in not considering unified vars.
(compute_tbaa_pruning): Stop initing useless iteration_obstack.
(compute_points_to_sets): Update for other function changes.
(pass_ipa_pta): We need to update SSA after ipa_pta.
All should be fixed