On 06/16/2015 02:55 AM, Richard Sandiford wrote:
This patch stops pointer_hash from inheriting typed_noop_remove and
instead creates a new class nofree_ptr_hash that inherits from both.
It then updates all uses of typed_noop_remove (which are all pointers)
and pointer_hash so that they use this new class instead.
gcc/
* hash-table.h: Update comments.
* hash-traits.h (pointer_hash): Don't inherit from typed_noop_remove.
(nofree_ptr_hash): New class.
* asan.c (asan_mem_ref_hasher): Inherit from nofree_ptr_hash rather
than typed_noop_remove. Remove redudant typedefs.
* attribs.c (attribute_hasher): Likewise.
* cfg.c (bb_copy_hasher): Likewise.
* cselib.c (cselib_hasher): Likewise.
* dse.c (invariant_group_base_hasher): Likewise.
* dwarf2cfi.c (trace_info_hasher): Likewise.
* dwarf2out.c (macinfo_entry_hasher): Likewise.
(comdat_type_hasher, loc_list_hasher): Likewise.
* gcse.c (pre_ldst_expr_hasher): Likewise.
* genmatch.c (id_base): Likewise.
* genrecog.c (test_pattern_hasher): Likewise.
* gimple-ssa-strength-reduction.c (cand_chain_hasher): Likewise.
* haifa-sched.c (delay_i1_hasher): Likewise.
* hard-reg-set.h (simplifiable_subregs_hasher): Likewise.
* ipa-icf.h (congruence_class_group_hash): Likewise.
* ipa-profile.c (histogram_hash): Likewise.
* ira-color.c (allocno_hard_regs_hasher): Likewise.
* lto-streamer.h (string_slot_hasher): Likewise.
* lto-streamer.c (tree_entry_hasher): Likewise.
* plugin.c (event_hasher): Likewise.
* postreload-gcse.c (expr_hasher): Likewise.
* store-motion.c (st_expr_hasher): Likewise.
* tree-sra.c (uid_decl_hasher): Likewise.
* tree-ssa-coalesce.c (coalesce_pair_hasher): Likewise.
(ssa_name_var_hash): Likewise.
* tree-ssa-live.c (tree_int_map_hasher): Likewise.
* tree-ssa-loop-im.c (mem_ref_hasher): Likewise.
* tree-ssa-pre.c (pre_expr_d): Likewise.
* tree-ssa-sccvn.c (vn_nary_op_hasher): Likewise.
* vtable-verify.h (registration_hasher): Likewise.
* vtable-verify.c (vtbl_map_hasher): Likewise.
* config/arm/arm.c (libcall_hasher): Likewise.
* config/i386/winnt.c (wrapped_symbol_hasher): Likewise.
* config/ia64/ia64.c (bundle_state_hasher): Likewise.
* config/sol2.c (comdat_entry_hasher): Likewise.
* fold-const.c (fold): Use nofree_ptr_hash instead of pointer_hash.
(print_fold_checksum, fold_checksum_tree): Likewise.
(debug_fold_checksum, fold_build1_stat_loc): Likewise.
(fold_build2_stat_loc, fold_build3_stat_loc): Likewise.
(fold_build_call_array_loc): Likewise.
* tree-ssa-ccp.c (gimple_htab): Likewise.
* tree-browser.c (tree_upper_hasher): Inherit from nofree_ptr_hash
rather than pointer_type.
gcc/c/
* c-decl.c (detect_field_duplicates_hash): Use nofree_ptr_hash
instead of pointer_hash.
(detect_field_duplicates): Likewise.
gcc/cp/
* class.c (fixed_type_or_null_ref_ht): Inherit from nofree_ptr_hash
rather than pointer_hash.
(fixed_type_or_null): Use nofree_ptr_hash instead of pointer_hash.
* semantics.c (nrv_data): Likewise.
* tree.c (verify_stmt_tree_r, verify_stmt_tree): Likewise.
gcc/java/
* jcf-io.c (charstar_hash): Inherit from nofree_ptr_hash rather
than typed_noop_remove. Remove redudant typedefs.
gcc/lto/
* lto.c (tree_scc_hasher): Inherit from nofree_ptr_hash rather
than typed_noop_remove. Remove redudant typedefs.
gcc/objc/
* objc-act.c (decl_name_hash): Inherit from nofree_ptr_hash rather
than typed_noop_remove. Remove redudant typedefs.
libcc1/
* plugin.cc (string_hasher): Inherit from nofree_ptr_hash rather
than typed_noop_remove. Remove redudant typedefs.
(plugin_context): Use nofree_ptr_hash rather than pointer_hash.
(plugin_context::mark): Likewise.
So are we allowing multiple inheritance in GCC? It seems like that's
what we've got for nofree_ptr_hash. Is there a better way to achieve
what you're trying to do, or do you think this use ought to fall under
some kind of exception?
Index: gcc/haifa-sched.c
===================================================================
--- gcc/haifa-sched.c 2015-06-16 09:53:47.338092692 +0100
+++ gcc/haifa-sched.c 2015-06-16 09:53:47.322092878 +0100
@@ -614,9 +614,8 @@ struct delay_pair
/* Helpers for delay hashing. */
-struct delay_i1_hasher : typed_noop_remove <delay_pair>
+struct delay_i1_hasher : nofree_ptr_hash <delay_pair>
{
- typedef delay_pair *value_type;
typedef void *compare_type;
static inline hashval_t hash (const delay_pair *);
static inline bool equal (const delay_pair *, const void *);
Did you keep compare_type intentionally? Similarly for the changes in
hard-reg-set.h, tree-ssa-loop-im.c, and tree-ssa-sccvn.c. You probably
did, but I just want to be sure.
So I'm holding off on approving this one pending further discussion of
the use of multiple inheritance for nofree_ptr_hash.
Jeff
