This patch rewrites the old VEC macro-based interface into a new one based on the template class 'vec'.

This patch rewrites the old VEC macro-based interface into a new one
based on the template class 'vec'.  The user-visible changes are
described in http://gcc.gnu.org/wiki/cxx-conversion/cxx-vec.

I have tested the patch pretty extensively:

- Regular bootstraps on x86_64, ppc, ia64, sparc and hppa.
- Bootstraps with --enable-checking=release
- Bootstraps with --enable-checking=gc,gcac
- Basic builds on all targets (using contrib/config-list.mk).

We no longer access the vectors via VEC_* macros.  The pattern is
"VEC_operation (T, A, V, args)" becomes "V.operation (args)".

The only thing I could not do is create proper ctors and dtors for the
vec class.  Since these vectors are stored in unions, we
have to keep them as PODs (C++03 does not allow non-PODs in unions).

This means that creation and destruction must be explicit.  There is a
new method vec<type, allocation, layout>::create() and another vec<type,
allocation, layout>::destroy() to allocate the internal vector.

For vectors that must be pointers, there is a family of free functions
that implement the operations that need to tolerate NULL vectors.
These functions all start with the prefix 'vec_safe_'.  See the wiki
page for details.

The gengtype change removes the special handling for VEC() that used
to exist in gengtype. Additionally, it allows gengtype to recognize
templates of more than one argument and introduces the concept of an
undefined type (useful for template arguments that may or may not be
types).

When a TYPE_UNDEFINED is reached, gengtype will ignore it if it
happens inside a type marked with GTY((user)).  Otherwise, it will
emit an error.

Finally, gengtype rejects root types marked GTY((user)) that are not
first class pointers.

2012-11-16  Diego Novillo  <dnovillo@google.com>

	VEC API overhaul (http://gcc.gnu.org/wiki/cxx-conversion/cxx-vec)

	* vec.c (register_overhead): Convert it into
	member function of vec_prefix.
	(release_overhead): Likewise.
	(calculate_allocation): Likewise.
	(vec_heap_free): Remove.
	(vec_gc_o_reserve_1): Remove.
	(vec_heap_o_reserve_1): Remove.
	(vec_stack_o_reserve_1): Remove.
	(vec_stack_o_reserve_exact): Remove.
	(register_stack_vec): New.
	(stack_vec_register_index): New.
	(unregister_stack_vec): New.
	(vec_assert_fail): Remove.
	* vec.h: Conditionally include ggc.h.  Document conditional
	hackery.
	Update top-level documentation.
	(ALONE_VEC_CHECK_INFO): Remove.
	(VEC_CHECK_INFO): Remove.
	(ALONE_VEC_CHECK_DECL): Remove.
	(VEC_CHECK_DECL): Remove.
	(ALONE_VEC_CHECK_PASS): Remove.
	(VEC_CHECK_PASS): Remove.
	(VEC_ASSERT): Remove.
	(vec_prefix): Add friends va_gc, va_gc_atomic, va_heap and
	va_stack.
	Mark fields alloc_ and num_ as protected.
	(struct vec_t): Remove.  Remove all function members.
	(struct vl_embed): Declare.
	(struct vl_ptr): Declare.
	(free): Remove.
	(reserve_exact): Remove.
	(reserve): Remove.
	(safe_splice): Remove.
	(safe_push): Remove.
	(safe_grow): Remove.
	(safe_grow_cleared): Remove.
	(safe_insert): Remove.
	(DEF_VEC_I): Remove.
	(DEF_VEC_ALLOC_I): Remove.
	(DEF_VEC_P): Remove.
	(DEF_VEC_ALLOC_P): Remove.
	(DEF_VEC_O): Remove.
	(DEF_VEC_ALLOC_O): Remove.
	(DEF_VEC_ALLOC_P_STACK): Remove.
	(DEF_VEC_ALLOC_O_STACK): Remove.
	(DEF_VEC_ALLOC_I_STACK): Remove.
	(DEF_VEC_A): Remove.
	(DEF_VEC_ALLOC_A): Remove.
	(vec_stack_p_reserve_exact_1): Remove.
	(vec_stack_o_reserve): Remove.
	(vec_stack_o_reserve_exact): Remove.
	(VEC_length): Remove.
	(VEC_empty): Remove.
	(VEC_address): Remove.
	(vec_address): Remove.
	(VEC_last): Remove.
	(VEC_index): Remove.
	(VEC_iterate): Remove.
	(VEC_embedded_size): Remove.
	(VEC_embedded_init): Remove.
	(VEC_free): Remove.
	(VEC_copy): Remove.
	(VEC_space): Remove.
	(VEC_reserve): Remove.
	(VEC_reserve_exact): Remove.
	(VEC_splice): Remove.
	(VEC_safe_splice): Remove.
	(VEC_quick_push): Remove.
	(VEC_safe_push): Remove.
	(VEC_pop): Remove.
	(VEC_truncate): Remove.
	(VEC_safe_grow): Remove.
	(VEC_replace): Remove.
	(VEC_quick_insert): Remove.
	(VEC_safe_insert): Remove.
	(VEC_ordered_remove): Remove.
	(VEC_unordered_remove): Remove.
	(VEC_block_remove): Remove.
	(VEC_lower_bound): Remove.
	(VEC_alloc): Remove.
	(VEC_qsort): Remove.

	(va_heap): Declare.
	(va_heap::default_layout): New typedef to vl_ptr.
	(va_heap::reserve): New.
	(va_heap::release): New.
	(va_gc): Declare.
	(va_gc::default_layout): New typedef to vl_embed.
	(va_gc::reserve): New.
	(va_gc::release): New.
	(va_gc_atomic): Declare.  Inherit from va_gc.
	(va_stack): Declare.
	(va_stack::default_layout): New typedef to vl_ptr.
	(va_stack::alloc): New.
	(va_stack::reserve): New.
	(va_stack::release): New.
	(register_stack_vec): Declare.
	(stack_vec_register_index): Declare.
	(unregister_stack_vec): Declare.

	(vec<T, A = va_heap, L = typename A::default_layout>): Declare
	empty vec template.
	(vec<T, A, vl_embed>): Partial specialization for embedded
	layout.
	(vec<T, A, vl_embed>::allocated): New.
	(vec<T, A, vl_embed>::length): New.
	(vec<T, A, vl_embed>::is_empty): New.
	(vec<T, A, vl_embed>::address): New.
	(vec<T, A, vl_embed>::operator[]): New.
	(vec<T, A, vl_embed>::last New.
	(vec<T, A, vl_embed>::space): New.
	(vec<T, A, vl_embed>::iterate): New.
	(vec<T, A, vl_embed>::iterate): New.
	(vec<T, A, vl_embed>::copy): New.
	(vec<T, A, vl_embed>::splice): New.
	(vec<T, A, vl_embed>::quick_push New.
	(vec<T, A, vl_embed>::pop New.
	(vec<T, A, vl_embed>::truncate): New.
	(vec<T, A, vl_embed>::quick_insert): New.
	(vec<T, A, vl_embed>::ordered_remove): New.
	(vec<T, A, vl_embed>::unordered_remove): New.
	(vec<T, A, vl_embed>::block_remove): New.
	(vec<T, A, vl_embed>::qsort): New.
	(vec<T, A, vl_embed>::lower_bound): New.
	(vec<T, A, vl_embed>::embedded_size): New.
	(vec<T, A, vl_embed>::embedded_init): New.
	(vec<T, A, vl_embed>::quick_grow): New.
	(vec<T, A, vl_embed>::quick_grow_cleared): New.
	(vec_safe_space): New.
	(vec_safe_length): New.
	(vec_safe_address): New.
	(vec_safe_is_empty): New.
	(vec_safe_reserve): New.
	(vec_safe_reserve_exact): New.
	(vec_alloc): New.
	(vec_free): New.
	(vec_safe_grow): New.
	(vec_safe_grow_cleared): New.
	(vec_safe_iterate): New.
	(vec_safe_push): New.
	(vec_safe_insert): New.
	(vec_safe_truncate): New.
	(vec_safe_copy): New.
	(vec_safe_splice): New.

	(vec<T, A, vl_ptr>): New partial specialization for the space
	efficient layout.
	(vec<T, A, vl_ptr>::exists): New.
	(vec<T, A, vl_ptr>::is_empty): New.
	(vec<T, A, vl_ptr>::length): New.
	(vec<T, A, vl_ptr>::address): New.
	(vec<T, A, vl_ptr>::operator[]): New.
	(vec<T, A, vl_ptr>::operator!=): New.
	(vec<T, A, vl_ptr>::operator==): New.
	(vec<T, A, vl_ptr>::last): New.
	(vec<T, A, vl_ptr>::space): New.
	(vec<T, A, vl_ptr>::iterate): New.
	(vec<T, A, vl_ptr>::copy): New.
	(vec<T, A, vl_ptr>::reserve): New.
	(vec<T, A, vl_ptr>::reserve_exact): New.
	(vec<T, A, vl_ptr>::splice): New.
	(vec<T, A, vl_ptr>::safe_splice): New.
	(vec<T, A, vl_ptr>::quick_push): New.
	(vec<T, A, vl_ptr>::safe_push): New.
	(vec<T, A, vl_ptr>::pop): New.
	(vec<T, A, vl_ptr>::truncate): New.
	(vec<T, A, vl_ptr>::safe_grow): New.
	(vec<T, A, vl_ptr>::safe_grow_cleared): New.
	(vec<T, A, vl_ptr>::quick_grow): New.
	(vec<T, A, vl_ptr>::quick_grow_cleared): New.
	(vec<T, A, vl_ptr>::quick_insert): New.
	(vec<T, A, vl_ptr>::safe_insert): New.
	(vec<T, A, vl_ptr>::ordered_remove): New.
	(vec<T, A, vl_ptr>::unordered_remove): New.
	(vec<T, A, vl_ptr>::block_remove): New.
	(vec<T, A, vl_ptr>::qsort): New.
	(vec<T, A, vl_ptr>::lower_bound): New.
	(vec_stack_alloc): Define.
	(FOR_EACH_VEC_SAFE_ELT): Define.
	* vecir.h: Remove.  Update all users.
	* vecprim.h: Remove.  Update all users.
	Move uchar to coretypes.h.

	* Makefile.in (VEC_H): Add $(GGC_H).
	Remove vecir.h and vecprim.h dependencies everywhere.

2012-11-16  Diego Novillo  <dnovillo@google.com>

	* gengtype-lex.l (VEC): Remove.
	Add characters in the set [\!\>\.-].
	* gengtype-parse.c (token_names): Remove "VEC".
	(require_template_declaration): Remove handling of VEC_TOKEN.
	(type): Likewise.
	Call create_user_defined_type when parsing GTY((user)).
	* gengtype-state.c (type_lineloc): handle TYPE_UNDEFINED.
	(write_state_undefined_type): New.
	(write_state_type): Call write_state_undefined_type for
	TYPE_UNDEFINED.
	(read_state_type): Call read_state_undefined_type for
	TYPE_UNDEFINED.
	* gengtype.c (dbgprint_count_type_at): Handle TYPE_UNDEFINED.
	(create_user_defined_type): Make extern.
	(type_for_name): Factor out of resolve_typedef.
	(create_undefined_type): New
	(resolve_typedef): Call it when we cannot find a previous
	typedef and the type is not a template.
	(find_structure): Accept TYPE_UNDEFINED.
	(set_gc_used_type): Add argument ALLOWED_UNDEFINED_TYPES,
	default to false.
	Emit an error for TYPE_UNDEFINED unless LEVEL is GC_UNUSED or
	ALLOWED_UNDEFINED_TYPES is set.
	Set ALLOWED_UNDEFINED_TYPES to true for TYPE_USER_STRUCT.
	(filter_type_name): Accept templates with more than one
	argument.
	(output_mangled_typename): Handle TYPE_UNDEFINED
	(walk_type): Likewise.
	(write_types_process_field): Likewise.
	(write_func_for_structure): If CHAIN_NEXT is set, ORIG_S
	should not be a user-defined type.
	(write_types_local_user_process_field): Handle TYPE_ARRAY,
	TYPE_NONE and TYPE_UNDEFINED.
	(write_types_local_process_field): Likewise.
	(contains_scalar_p): Return 0 for TYPE_USER_STRUCT.
	(write_root): Reject user-defined types that are not pointers.
	Handle TYPE_NONE, TYPE_UNDEFINED, TYPE_UNION, TYPE_LANG_STRUCT
	and TYPE_PARAM_STRUCT.
	(output_typename): Handle TYPE_NONE, TYPE_UNDEFINED, and
	TYPE_ARRAY.
	(dump_typekind): Handle TYPE_UNDEFINED.
	* gengtype.h (enum typekind): Add TYPE_UNDEFINED.
	(create_user_defined_type): Declare.
	(enum gty_token): Remove VEC_TOKEN.

2012-11-16  Diego Novillo  <dnovillo@google.com>

	Adjust for new vec API (http://gcc.gnu.org/wiki/cxx-conversion/cxx-vec)

	* coretypes.h (uchar): Define.
	* alias.c: Use new vec API in vec.h.
	* asan.c: Likewise.
	* attribs.c: Likewise.
	* basic-block.h: Likewise.
	* bb-reorder.c: Likewise.
	* builtins.c: Likewise.
	* calls.c: Likewise.
	* cfg.c: Likewise.
	* cfganal.c: Likewise.
	* cfgcleanup.c: Likewise.
	* cfgexpand.c: Likewise.
	* cfghooks.c: Likewise.
	* cfghooks.h: Likewise.
	* cfgloop.c: Likewise.
	* cfgloop.h: Likewise.
	* cfgloopanal.c: Likewise.
	* cfgloopmanip.c: Likewise.
	* cfgrtl.c: Likewise.
	* cgraph.c: Likewise.
	* cgraph.h: Likewise.
	* cgraphclones.c: Likewise.
	* cgraphunit.c: Likewise.
	* combine.c: Likewise.
	* compare-elim.c: Likewise.
	* coverage.c: Likewise.
	* cprop.c: Likewise.
	* data-streamer.h: Likewise.
	* dbxout.c: Likewise.
	* dce.c: Likewise.
	* df-core.c: Likewise.
	* df-problems.c: Likewise.
	* df-scan.c: Likewise.
	* dominance.c: Likewise.
	* domwalk.c: Likewise.
	* domwalk.h: Likewise.
	* dse.c: Likewise.
	* dwarf2cfi.c: Likewise.
	* dwarf2out.c: Likewise.
	* dwarf2out.h: Likewise.
	* emit-rtl.c: Likewise.
	* except.c: Likewise.
	* except.h: Likewise.
	* expr.c: Likewise.
	* expr.h: Likewise.
	* final.c: Likewise.
	* fold-const.c: Likewise.
	* function.c: Likewise.
	* function.h: Likewise.
	* fwprop.c: Likewise.
	* gcc.c: Likewise.
	* gcse.c: Likewise.
	* genattr.c: Likewise.
	* genattrtab.c: Likewise.
	* genautomata.c: Likewise.
	* genextract.c: Likewise.
	* genopinit.c: Likewise
	* ggc-common.c: Likewise.
	* ggc.h: Likewise.
	* gimple-low.c: Likewise.
	* gimple-ssa-strength-reduction.c: Likewise.
	* gimple-streamer-in.c: Likewise.
	* gimple.c: Likewise.
	* gimple.h: Likewise.
	* gimplify.c: Likewise.
	* graph.c: Likewise.
	* graphds.c: Likewise.
	* graphds.h: Likewise.
	* graphite-blocking.c: Likewise.
	* graphite-clast-to-gimple.c: Likewise.
	* graphite-dependences.c: Likewise.
	* graphite-interchange.c: Likewise.
	* graphite-optimize-isl.c: Likewise.
	* graphite-poly.c: Likewise.
	* graphite-poly.h: Likewise.
	* graphite-scop-detection.c: Likewise.
	* graphite-scop-detection.h: Likewise.
	* graphite-sese-to-poly.c: Likewise.
	* graphite.c: Likewise.
	* godump.c: Likewise.
	* haifa-sched.c: Likewise.
	* hw-doloop.c: Likewise.
	* hw-doloop.h: Likewise.
	* ifcvt.c: Likewise.
	* insn-addr.h: Likewise.
	* ipa-cp.c: Likewise.
	* ipa-inline-analysis.c: Likewise.
	* ipa-inline-transform.c: Likewise.
	* ipa-inline.c: Likewise.
	* ipa-inline.h: Likewise.
	* ipa-prop.c: Likewise.
	* ipa-prop.h: Likewise.
	* ipa-pure-const.c: Likewise.
	* ipa-ref-inline.h: Likewise.
	* ipa-ref.c: Likewise.
	* ipa-ref.h: Likewise.
	* ipa-reference.c: Likewise.
	* ipa-split.c: Likewise.
	* ipa-utils.c: Likewise.
	* ipa-utils.h: Likewise.
	* ipa.c: Likewise.
	* ira-build.c: Likewise.
	* ira-color.c: Likewise.
	* ira-emit.c: Likewise.
	* ira-int.h: Likewise.
	* ira.c: Likewise.
	* loop-invariant.c: Likewise.
	* loop-unroll.c: Likewise.
	* lower-subreg.c: Likewise.
	* lra-lives.c: Likewise.
	* lra.c: Likewise.
	* lto-cgraph.c: Likewise.
	* lto-section-out.c: Likewise.
	* lto-streamer-in.c: Likewise.
	* lto-streamer-out.c: Likewise.
	* lto-streamer.h: Likewise.
	* lto-symtab.c: Likewise.
	* mcf.c: Likewise.
	* modulo-sched.c: Likewise.
	* omp-low.c: Likewise.
	* opts-common.c: Likewise.
	* opts-global.c: Likewise.
	* opts.c: Likewise.
	* opts.h: Likewise.
	* passes.c: Likewise.
	* predict.c: Likewise.
	* print-tree.c: Likewise.
	* profile.c: Likewise.
	* profile.h: Likewise.
	* read-rtl.c: Likewise.
	* ree.c: Likewise.
	* reg-stack.c: Likewise.
	* regrename.c: Likewise.
	* regrename.h: Likewise.
	* reload.c: Likewise.
	* reload.h: Likewise.
	* reload1.c: Likewise.
	* rtl.h: Likewise.
	* sched-deps.c: Likewise.
	* sched-int.h: Likewise.
	* sdbout.c: Likewise.
	* sel-sched-dump.c: Likewise.
	* sel-sched-ir.c: Likewise.
	* sel-sched-ir.h: Likewise.
	* sel-sched.c: Likewise.
	* sese.c: Likewise.
	* sese.h: Likewise.
	* statistics.h: Likewise.
	* stmt.c: Likewise.
	* stor-layout.c: Likewise.
	* store-motion.c: Likewise.
	* tlink.c: Likewise.
	* toplev.c: Likewise.
	* trans-mem.c: Likewise.
	* tree-browser.c: Likewise.
	* tree-call-cdce.c: Likewise.
	* tree-cfg.c: Likewise.
	* tree-cfgcleanup.c: Likewise.
	* tree-chrec.c: Likewise.
	* tree-chrec.h: Likewise.
	* tree-complex.c: Likewise.
	* tree-data-ref.c: Likewise.
	* tree-data-ref.h: Likewise.
	* tree-dfa.c: Likewise.
	* tree-diagnostic.c: Likewise.
	* tree-dump.c: Likewise.
	* tree-eh.c: Likewise.
	* tree-emutls.c: Likewise.
	* tree-flow.h: Likewise.
	* tree-if-conv.c: Likewise.
	* tree-inline.c: Likewise.
	* tree-inline.h: Likewise.
	* tree-into-ssa.c: Likewise.
	* tree-iterator.c: Likewise.
	* tree-loop-distribution.c: Likewise.
	* tree-mudflap.c: Likewise.
	* tree-optimize.c: Likewise.
	* tree-outof-ssa.c: Likewise.
	* tree-parloops.c: Likewise.
	* tree-phinodes.c: Likewise.
	* tree-predcom.c: Likewise.
	* tree-pretty-print.c: Likewise.
	* tree-scalar-evolution.c: Likewise.
	* tree-sra.c: Likewise.
	* tree-ssa-address.c: Likewise.
	* tree-ssa-alias.c: Likewise.
	* tree-ssa-ccp.c: Likewise.
	* tree-ssa-coalesce.c: Likewise.
	* tree-ssa-dce.c: Likewise.
	* tree-ssa-dom.c: Likewise.
	* tree-ssa-forwprop.c: Likewise.
	* tree-ssa-live.c: Likewise.
	* tree-ssa-live.h: Likewise.
	* tree-ssa-loop-im.c: Likewise.
	* tree-ssa-loop-ivcanon.c: Likewise.
	* tree-ssa-loop-ivopts.c: Likewise.
	* tree-ssa-loop-manip.c: Likewise.
	* tree-ssa-loop-niter.c: Likewise.
	* tree-ssa-loop-prefetch.c: Likewise.
	* tree-ssa-math-opts.c: Likewise.
	* tree-ssa-operands.c: Likewise.
	* tree-ssa-phiopt.c: Likewise.
	* tree-ssa-phiprop.c: Likewise.
	* tree-ssa-pre.c: Likewise.
	* tree-ssa-propagate.c: Likewise.
	* tree-ssa-reassoc.c: Likewise.
	* tree-ssa-sccvn.c: Likewise.
	* tree-ssa-sccvn.h: Likewise.
	* tree-ssa-strlen.c: Likewise.
	* tree-ssa-structalias.c: Likewise.
	* tree-ssa-tail-merge.c: Likewise.
	* tree-ssa-threadedge.c: Likewise.
	* tree-ssa-threadupdate.c: Likewise.
	* tree-ssa-uncprop.c: Likewise.
	* tree-ssa-uninit.c: Likewise.
	* tree-ssa.c: Likewise.
	* tree-ssanames.c: Likewise.
	* tree-stdarg.c: Likewise.
	* tree-streamer-in.c: Likewise.
	* tree-streamer-out.c: Likewise.
	* tree-streamer.c: Likewise.
	* tree-streamer.h: Likewise.
	* tree-switch-conversion.c: Likewise.
	* tree-vect-data-refs.c: Likewise.
	* tree-vect-generic.c: Likewise.
	* tree-vect-loop-manip.c: Likewise.
	* tree-vect-loop.c: Likewise.
	* tree-vect-patterns.c: Likewise.
	* tree-vect-slp.c: Likewise.
	* tree-vect-stmts.c: Likewise.
	* tree-vectorizer.c: Likewise.
	* tree-vectorizer.h: Likewise.
	* tree-vrp.c: Likewise.
	* tree.c: Likewise.
	* tree.h: Likewise.
	* value-prof.c: Likewise.
	* value-prof.h: Likewise.
	* var-tracking.c: Likewise.
	* varasm.c: Likewise.
	* varpool.c: Likewise.
	* vmsdbgout.c: Likewise.
	* config/bfin/bfin.c: Likewise.
	* config/c6x/c6x.c: Likewise.
	* config/darwin.c: Likewise.
	* config/i386/i386.c: Likewise.
	* config/ia64/ia64.c: Likewise.
	* config/mep/mep.c: Likewise.
	* config/mips/mips.c: Likewise.
	* config/pa/pa.c: Likewise.
	* config/rs6000/rs6000-c.c: Likewise.
	* config/rs6000/rs6000.c: Likewise.
	* config/rx/rx.c: Likewise.
	* config/spu/spu-c.c: Likewise.
	* config/vms/vms.c: Likewise.
	* config/vxworks.c: Likewise.
	* config/epiphany/resolve-sw-modes.c: Likewise.

From-SVN: r193595

1 files changed, 32 insertions, 30 deletions

diff --git a/gcc/tree-switch-conversion.c b/gcc/tree-switch-conversion.c
index a35df7c..611b6b9 100644
--- a/gcc/tree-switch-conversion.c
+++ b/gcc/tree-switch-conversion.c
@@ -301,7 +301,7 @@ emit_case_bit_tests (gimple swtch, tree index_expr,
   edge default_edge;
   bool update_dom = dom_info_available_p (CDI_DOMINATORS);
 
-  VEC (basic_block, heap) *bbs_to_fix_dom = NULL;
+  vec<basic_block> bbs_to_fix_dom = vec<basic_block>();
 
   tree index_type = TREE_TYPE (index_expr);
   tree unsigned_index_type = unsigned_type_for (index_type);
@@ -374,10 +374,10 @@ emit_case_bit_tests (gimple swtch, tree index_expr,
 
   if (update_dom)
     {
-      bbs_to_fix_dom = VEC_alloc (basic_block, heap, 10);
-      VEC_quick_push (basic_block, bbs_to_fix_dom, switch_bb);
-      VEC_quick_push (basic_block, bbs_to_fix_dom, default_bb);
-      VEC_quick_push (basic_block, bbs_to_fix_dom, new_default_bb);
+      bbs_to_fix_dom.create (10);
+      bbs_to_fix_dom.quick_push (switch_bb);
+      bbs_to_fix_dom.quick_push (default_bb);
+      bbs_to_fix_dom.quick_push (new_default_bb);
     }
 
   /* Now build the test-and-branch code.  */
@@ -400,7 +400,7 @@ emit_case_bit_tests (gimple swtch, tree index_expr,
   tmp = fold_build2 (GT_EXPR, boolean_type_node, idx, range);
   new_bb = hoist_edge_and_branch_if_true (&gsi, tmp, default_edge, update_dom);
   if (update_dom)
-    VEC_quick_push (basic_block, bbs_to_fix_dom, new_bb);
+    bbs_to_fix_dom.quick_push (new_bb);
   gcc_assert (gimple_bb (swtch) == new_bb);
   gsi = gsi_last_bb (new_bb);
 
@@ -408,19 +408,19 @@ emit_case_bit_tests (gimple swtch, tree index_expr,
      of NEW_BB, are still immediately dominated by SWITCH_BB.  Make it so.  */
   if (update_dom)
     {
-      VEC (basic_block, heap) *dom_bbs;
+      vec<basic_block> dom_bbs;
       basic_block dom_son;
 
       dom_bbs = get_dominated_by (CDI_DOMINATORS, new_bb);
-      FOR_EACH_VEC_ELT (basic_block, dom_bbs, i, dom_son)
+      FOR_EACH_VEC_ELT (dom_bbs, i, dom_son)
 	{
 	  edge e = find_edge (new_bb, dom_son);
 	  if (e && single_pred_p (e->dest))
 	    continue;
 	  set_immediate_dominator (CDI_DOMINATORS, dom_son, switch_bb);
-	  VEC_safe_push (basic_block, heap, bbs_to_fix_dom, dom_son);
+	  bbs_to_fix_dom.safe_push (dom_son);
 	}
-      VEC_free (basic_block, heap, dom_bbs);
+      dom_bbs.release ();
     }
 
   /* csui = (1 << (word_mode) idx) */
@@ -447,7 +447,7 @@ emit_case_bit_tests (gimple swtch, tree index_expr,
       new_bb = hoist_edge_and_branch_if_true (&gsi, tmp, test[k].target_edge,
 					      update_dom);
       if (update_dom)
-	VEC_safe_push (basic_block, heap, bbs_to_fix_dom, new_bb);
+	bbs_to_fix_dom.safe_push (new_bb);
       gcc_assert (gimple_bb (swtch) == new_bb);
       gsi = gsi_last_bb (new_bb);
     }
@@ -465,7 +465,7 @@ emit_case_bit_tests (gimple swtch, tree index_expr,
     {
       /* Fix up the dominator tree.  */
       iterate_fix_dominators (CDI_DOMINATORS, bbs_to_fix_dom, true);
-      VEC_free (basic_block, heap, bbs_to_fix_dom);
+      bbs_to_fix_dom.release ();
     }
 }
 
@@ -571,7 +571,7 @@ struct switch_conv_info
   tree *default_values;
 
   /* Constructors of new static arrays.  */
-  VEC (constructor_elt, gc) **constructors;
+  vec<constructor_elt, va_gc> **constructors;
 
   /* Array of ssa names that are initialized with a value from a new static
      array.  */
@@ -792,12 +792,14 @@ create_temp_arrays (struct switch_conv_info *info)
   int i;
 
   info->default_values = XCNEWVEC (tree, info->phi_count * 3);
-  info->constructors = XCNEWVEC (VEC (constructor_elt, gc) *, info->phi_count);
+  /* ??? Macros do not support multi argument templates in their
+     argument list.  We create a typedef to work around that problem.  */
+  typedef vec<constructor_elt, va_gc> *vec_constructor_elt_gc;
+  info->constructors = XCNEWVEC (vec_constructor_elt_gc, info->phi_count);
   info->target_inbound_names = info->default_values + info->phi_count;
   info->target_outbound_names = info->target_inbound_names + info->phi_count;
   for (i = 0; i < info->phi_count; i++)
-    info->constructors[i]
-      = VEC_alloc (constructor_elt, gc, tree_low_cst (info->range_size, 1) + 1);
+    vec_alloc (info->constructors[i], tree_low_cst (info->range_size, 1) + 1);
 }
 
 /* Free the arrays created by create_temp_arrays().  The vectors that are
@@ -872,7 +874,7 @@ build_constructors (gimple swtch, struct switch_conv_info *info)
 
 	      elt.index = int_const_binop (MINUS_EXPR, pos, info->range_min);
 	      elt.value = info->default_values[k];
-	      VEC_quick_push (constructor_elt, info->constructors[k], elt);
+	      info->constructors[k]->quick_push (elt);
 	    }
 
 	  pos = int_const_binop (PLUS_EXPR, pos, integer_one_node);
@@ -898,7 +900,7 @@ build_constructors (gimple swtch, struct switch_conv_info *info)
 
 	      elt.index = int_const_binop (MINUS_EXPR, pos, info->range_min);
 	      elt.value = val;
-	      VEC_quick_push (constructor_elt, info->constructors[j], elt);
+	      info->constructors[j]->quick_push (elt);
 
 	      pos = int_const_binop (PLUS_EXPR, pos, integer_one_node);
 	    } while (!tree_int_cst_lt (high, pos)
@@ -913,13 +915,13 @@ build_constructors (gimple swtch, struct switch_conv_info *info)
    vectors.  */
 
 static tree
-constructor_contains_same_values_p (VEC (constructor_elt, gc) *vec)
+constructor_contains_same_values_p (vec<constructor_elt, va_gc> *vec)
 {
   unsigned int i;
   tree prev = NULL_TREE;
   constructor_elt *elt;
 
-  FOR_EACH_VEC_ELT (constructor_elt, vec, i, elt)
+  FOR_EACH_VEC_SAFE_ELT (vec, i, elt)
     {
       if (!prev)
 	prev = elt->value;
@@ -937,7 +939,7 @@ static tree
 array_value_type (gimple swtch, tree type, int num,
 		  struct switch_conv_info *info)
 {
-  unsigned int i, len = VEC_length (constructor_elt, info->constructors[num]);
+  unsigned int i, len = vec_safe_length (info->constructors[num]);
   constructor_elt *elt;
   enum machine_mode mode;
   int sign = 0;
@@ -953,7 +955,7 @@ array_value_type (gimple swtch, tree type, int num,
   if (len < (optimize_bb_for_size_p (gimple_bb (swtch)) ? 2 : 32))
     return type;
 
-  FOR_EACH_VEC_ELT (constructor_elt, info->constructors[num], i, elt)
+  FOR_EACH_VEC_SAFE_ELT (info->constructors[num], i, elt)
     {
       double_int cst;
 
@@ -1039,7 +1041,7 @@ build_one_array (gimple swtch, int num, tree arr_index_type, gimple phi,
 	  unsigned int i;
 	  constructor_elt *elt;
 
-	  FOR_EACH_VEC_ELT (constructor_elt, info->constructors[num], i, elt)
+	  FOR_EACH_VEC_SAFE_ELT (info->constructors[num], i, elt)
 	    elt->value = fold_convert (value_type, elt->value);
 	}
       ctor = build_constructor (array_type, info->constructors[num]);
@@ -1292,7 +1294,7 @@ gen_inbound_check (gimple swtch, struct switch_conv_info *info)
   /* Fix the dominator tree, if it is available.  */
   if (dom_info_available_p (CDI_DOMINATORS))
     {
-      VEC (basic_block, heap) *bbs_to_fix_dom;
+      vec<basic_block> bbs_to_fix_dom;
 
       set_immediate_dominator (CDI_DOMINATORS, bb1, bb0);
       set_immediate_dominator (CDI_DOMINATORS, bb2, bb0);
@@ -1300,14 +1302,14 @@ gen_inbound_check (gimple swtch, struct switch_conv_info *info)
 	/* If bbD was the immediate dominator ...  */
 	set_immediate_dominator (CDI_DOMINATORS, bbf, bb0);
 
-      bbs_to_fix_dom = VEC_alloc (basic_block, heap, 4);
-      VEC_quick_push (basic_block, bbs_to_fix_dom, bb0);
-      VEC_quick_push (basic_block, bbs_to_fix_dom, bb1);
-      VEC_quick_push (basic_block, bbs_to_fix_dom, bb2);
-      VEC_quick_push (basic_block, bbs_to_fix_dom, bbf);
+      bbs_to_fix_dom.create (4);
+      bbs_to_fix_dom.quick_push (bb0);
+      bbs_to_fix_dom.quick_push (bb1);
+      bbs_to_fix_dom.quick_push (bb2);
+      bbs_to_fix_dom.quick_push (bbf);
 
       iterate_fix_dominators (CDI_DOMINATORS, bbs_to_fix_dom, true);
-      VEC_free (basic_block, heap, bbs_to_fix_dom);
+      bbs_to_fix_dom.release ();
     }
 }