- return res;
-} /* new_rd_SymConst_type */
-
-ir_node *
-new_rd_SymConst(dbg_info *db, ir_graph *irg, ir_node *block, symconst_symbol value,
- symconst_kind symkind)
-{
- ir_node *res = new_rd_SymConst_type(db, irg, block, value, symkind, firm_unknown_type);
- return res;
-} /* new_rd_SymConst */
-
-ir_node *new_rd_SymConst_addr_ent(dbg_info *db, ir_graph *irg, entity *symbol, ir_type *tp)
-{
- symconst_symbol sym = {(ir_type *)symbol};
- return new_rd_SymConst_type(db, irg, get_irg_start_block(irg), sym, symconst_addr_ent, tp);
-} /* new_rd_SymConst_addr_ent */
-
-ir_node *new_rd_SymConst_addr_name(dbg_info *db, ir_graph *irg, ident *symbol, ir_type *tp) {
- symconst_symbol sym = {(ir_type *)symbol};
- return new_rd_SymConst_type(db, irg, get_irg_start_block(irg), sym, symconst_addr_name, tp);
-} /* new_rd_SymConst_addr_name */
-
-ir_node *new_rd_SymConst_type_tag(dbg_info *db, ir_graph *irg, ir_type *symbol, ir_type *tp) {
- symconst_symbol sym = {symbol};
- return new_rd_SymConst_type(db, irg, get_irg_start_block(irg), sym, symconst_type_tag, tp);
-} /* new_rd_SymConst_type_tag */
-
-ir_node *new_rd_SymConst_size(dbg_info *db, ir_graph *irg, ir_type *symbol, ir_type *tp) {
- symconst_symbol sym = {symbol};
- return new_rd_SymConst_type(db, irg, get_irg_start_block(irg), sym, symconst_type_size, tp);
-} /* new_rd_SymConst_size */
-
-ir_node *new_rd_SymConst_align(dbg_info *db, ir_graph *irg, ir_type *symbol, ir_type *tp) {
- symconst_symbol sym = {symbol};
- return new_rd_SymConst_type(db, irg, get_irg_start_block(irg), sym, symconst_type_align, tp);
-} /* new_rd_SymConst_align */
-
-ir_node *
-new_rd_Sync(dbg_info *db, ir_graph *irg, ir_node *block, int arity, ir_node *in[])
-{
- ir_node *res;
- ir_graph *rem = current_ir_graph;
- int i;
-
- current_ir_graph = irg;
- res = new_bd_Sync(db, block);
- current_ir_graph = rem;
-
- for (i = 0; i < arity; ++i)
- add_Sync_pred(res, in[i]);
-
- return res;
-} /* new_rd_Sync */
-
-ir_node *
-new_rd_Bad(ir_graph *irg) {
- return get_irg_bad(irg);
-} /* new_rd_Bad */
-
-ir_node *
-new_rd_Confirm(dbg_info *db, ir_graph *irg, ir_node *block, ir_node *val, ir_node *bound, pn_Cmp cmp)
-{
- ir_node *res;
- ir_graph *rem = current_ir_graph;
-
- current_ir_graph = irg;
- res = new_bd_Confirm(db, block, val, bound, cmp);
- current_ir_graph = rem;
-
- return res;
-} /* new_rd_Confirm */
-
-/* this function is often called with current_ir_graph unset */
-ir_node *
-new_rd_Unknown(ir_graph *irg, ir_mode *m)
-{
- ir_node *res;
- ir_graph *rem = current_ir_graph;
-
- current_ir_graph = irg;
- res = new_bd_Unknown(m);
- current_ir_graph = rem;
-
- return res;
-} /* new_rd_Unknown */
-
-ir_node *
-new_rd_CallBegin(dbg_info *db, ir_graph *irg, ir_node *block, ir_node *call)
-{
- ir_node *res;
- ir_graph *rem = current_ir_graph;
-
- current_ir_graph = irg;
- res = new_bd_CallBegin(db, block, call);
- current_ir_graph = rem;
-
- return res;
-} /* new_rd_CallBegin */
-
-ir_node *
-new_rd_EndReg(dbg_info *db, ir_graph *irg, ir_node *block)
-{
- ir_node *res;
-
- res = new_ir_node(db, irg, block, op_EndReg, mode_T, -1, NULL);
- set_irg_end_reg(irg, res);
- IRN_VRFY_IRG(res, irg);
- return res;
-} /* new_rd_EndReg */
-
-ir_node *
-new_rd_EndExcept(dbg_info *db, ir_graph *irg, ir_node *block)
-{
- ir_node *res;
-
- res = new_ir_node(db, irg, block, op_EndExcept, mode_T, -1, NULL);
- set_irg_end_except(irg, res);
- IRN_VRFY_IRG (res, irg);
- return res;
-} /* new_rd_EndExcept */
-
-ir_node *
-new_rd_Break(dbg_info *db, ir_graph *irg, ir_node *block)
-{
- ir_node *res;
- ir_graph *rem = current_ir_graph;
-
- current_ir_graph = irg;
- res = new_bd_Break(db, block);
- current_ir_graph = rem;
-
- return res;
-} /* new_rd_Break */
-
-ir_node *
-new_rd_Filter(dbg_info *db, ir_graph *irg, ir_node *block, ir_node *arg, ir_mode *mode,
- long proj)
-{
- ir_node *res;
- ir_graph *rem = current_ir_graph;
-
- current_ir_graph = irg;
- res = new_bd_Filter(db, block, arg, mode, proj);
- current_ir_graph = rem;
-
- return res;
-} /* new_rd_Filter */
-
-ir_node *
-new_rd_NoMem(ir_graph *irg) {
- return get_irg_no_mem(irg);
-} /* new_rd_NoMem */
-
-ir_node *
-new_rd_Mux(dbg_info *db, ir_graph *irg, ir_node *block,
- ir_node *sel, ir_node *ir_false, ir_node *ir_true, ir_mode *mode)
-{
- ir_node *res;
- ir_graph *rem = current_ir_graph;
-
- current_ir_graph = irg;
- res = new_bd_Mux(db, block, sel, ir_false, ir_true, mode);
- current_ir_graph = rem;
-
- return res;
-} /* new_rd_Mux */
-
-ir_node *
-new_rd_Psi(dbg_info *db, ir_graph *irg, ir_node *block,
- int arity, ir_node *cond[], ir_node *vals[], ir_mode *mode)
-{
- ir_node *res;
- ir_graph *rem = current_ir_graph;
-
- current_ir_graph = irg;
- res = new_bd_Psi(db, block, arity, cond, vals, mode);
- current_ir_graph = rem;
-
- return res;
-} /* new_rd_Psi */
-
-ir_node *new_rd_CopyB(dbg_info *db, ir_graph *irg, ir_node *block,
- ir_node *store, ir_node *dst, ir_node *src, ir_type *data_type)
-{
- ir_node *res;
- ir_graph *rem = current_ir_graph;
-
- current_ir_graph = irg;
- res = new_bd_CopyB(db, block, store, dst, src, data_type);
- current_ir_graph = rem;
-
- return res;
-} /* new_rd_CopyB */
-
-ir_node *
-new_rd_InstOf(dbg_info *db, ir_graph *irg, ir_node *block, ir_node *store,
- ir_node *objptr, ir_type *type)
-{
- ir_node *res;
- ir_graph *rem = current_ir_graph;
-
- current_ir_graph = irg;
- res = new_bd_InstOf(db, block, store, objptr, type);
- current_ir_graph = rem;
-
- return res;
-} /* new_rd_InstOf */
-
-ir_node *
-new_rd_Raise(dbg_info *db, ir_graph *irg, ir_node *block, ir_node *store, ir_node *obj)
-{
- ir_node *res;
- ir_graph *rem = current_ir_graph;
-
- current_ir_graph = irg;
- res = new_bd_Raise(db, block, store, obj);
- current_ir_graph = rem;
-
- return res;
-} /* new_rd_Raise */
-
-ir_node *new_rd_Bound(dbg_info *db, ir_graph *irg, ir_node *block,
- ir_node *store, ir_node *idx, ir_node *lower, ir_node *upper)
-{
- ir_node *res;
- ir_graph *rem = current_ir_graph;
-
- current_ir_graph = irg;
- res = new_bd_Bound(db, block, store, idx, lower, upper);
- current_ir_graph = rem;
-
- return res;
-} /* new_rd_Bound */
-
-ir_node *new_rd_Pin(dbg_info *db, ir_graph *irg, ir_node *block, ir_node *node)
-{
- ir_node *res;
- ir_graph *rem = current_ir_graph;
-
- current_ir_graph = irg;
- res = new_bd_Pin(db, block, node);
- current_ir_graph = rem;
-
- return res;
-} /* new_rd_Pin */
-
-ir_node *new_r_Block (ir_graph *irg, int arity, ir_node **in) {
- return new_rd_Block(NULL, irg, arity, in);
-}
-ir_node *new_r_Start (ir_graph *irg, ir_node *block) {
- return new_rd_Start(NULL, irg, block);
-}
-ir_node *new_r_End (ir_graph *irg, ir_node *block) {
- return new_rd_End(NULL, irg, block);
-}
-ir_node *new_r_Jmp (ir_graph *irg, ir_node *block) {
- return new_rd_Jmp(NULL, irg, block);
-}
-ir_node *new_r_IJmp (ir_graph *irg, ir_node *block, ir_node *tgt) {
- return new_rd_IJmp(NULL, irg, block, tgt);
-}
-ir_node *new_r_Cond (ir_graph *irg, ir_node *block, ir_node *c) {
- return new_rd_Cond(NULL, irg, block, c);
-}
-ir_node *new_r_Return (ir_graph *irg, ir_node *block,
- ir_node *store, int arity, ir_node **in) {
- return new_rd_Return(NULL, irg, block, store, arity, in);
-}
-ir_node *new_r_Const (ir_graph *irg, ir_node *block,
- ir_mode *mode, tarval *con) {
- return new_rd_Const(NULL, irg, block, mode, con);
-}
-ir_node *new_r_Const_long(ir_graph *irg, ir_node *block,
- ir_mode *mode, long value) {
- return new_rd_Const_long(NULL, irg, block, mode, value);
-}
-ir_node *new_r_Const_type(ir_graph *irg, ir_node *block,
- ir_mode *mode, tarval *con, ir_type *tp) {
- return new_rd_Const_type(NULL, irg, block, mode, con, tp);
-}
-ir_node *new_r_SymConst (ir_graph *irg, ir_node *block,
- symconst_symbol value, symconst_kind symkind) {
- return new_rd_SymConst(NULL, irg, block, value, symkind);
-}
-ir_node *new_r_simpleSel(ir_graph *irg, ir_node *block, ir_node *store,
- ir_node *objptr, entity *ent) {
- return new_rd_Sel(NULL, irg, block, store, objptr, 0, NULL, ent);
-}
-ir_node *new_r_Sel (ir_graph *irg, ir_node *block, ir_node *store,
- ir_node *objptr, int n_index, ir_node **index,
- entity *ent) {
- return new_rd_Sel(NULL, irg, block, store, objptr, n_index, index, ent);
-}
-ir_node *new_r_Call (ir_graph *irg, ir_node *block, ir_node *store,
- ir_node *callee, int arity, ir_node **in,
- ir_type *tp) {
- return new_rd_Call(NULL, irg, block, store, callee, arity, in, tp);
-}
-ir_node *new_r_Add (ir_graph *irg, ir_node *block,
- ir_node *op1, ir_node *op2, ir_mode *mode) {
- return new_rd_Add(NULL, irg, block, op1, op2, mode);
-}
-ir_node *new_r_Sub (ir_graph *irg, ir_node *block,
- ir_node *op1, ir_node *op2, ir_mode *mode) {
- return new_rd_Sub(NULL, irg, block, op1, op2, mode);
-}
-ir_node *new_r_Minus (ir_graph *irg, ir_node *block,
- ir_node *op, ir_mode *mode) {
- return new_rd_Minus(NULL, irg, block, op, mode);
-}
-ir_node *new_r_Mul (ir_graph *irg, ir_node *block,
- ir_node *op1, ir_node *op2, ir_mode *mode) {
- return new_rd_Mul(NULL, irg, block, op1, op2, mode);
-}
-ir_node *new_r_Quot (ir_graph *irg, ir_node *block,
- ir_node *memop, ir_node *op1, ir_node *op2) {
- return new_rd_Quot(NULL, irg, block, memop, op1, op2);
-}
-ir_node *new_r_DivMod (ir_graph *irg, ir_node *block,
- ir_node *memop, ir_node *op1, ir_node *op2) {
- return new_rd_DivMod(NULL, irg, block, memop, op1, op2);
-}
-ir_node *new_r_Div (ir_graph *irg, ir_node *block,
- ir_node *memop, ir_node *op1, ir_node *op2) {
- return new_rd_Div(NULL, irg, block, memop, op1, op2);
-}
-ir_node *new_r_Mod (ir_graph *irg, ir_node *block,
- ir_node *memop, ir_node *op1, ir_node *op2) {
- return new_rd_Mod(NULL, irg, block, memop, op1, op2);
-}
-ir_node *new_r_Abs (ir_graph *irg, ir_node *block,
- ir_node *op, ir_mode *mode) {
- return new_rd_Abs(NULL, irg, block, op, mode);
-}
-ir_node *new_r_And (ir_graph *irg, ir_node *block,
- ir_node *op1, ir_node *op2, ir_mode *mode) {
- return new_rd_And(NULL, irg, block, op1, op2, mode);
-}
-ir_node *new_r_Or (ir_graph *irg, ir_node *block,
- ir_node *op1, ir_node *op2, ir_mode *mode) {
- return new_rd_Or(NULL, irg, block, op1, op2, mode);
-}
-ir_node *new_r_Eor (ir_graph *irg, ir_node *block,
- ir_node *op1, ir_node *op2, ir_mode *mode) {
- return new_rd_Eor(NULL, irg, block, op1, op2, mode);
-}
-ir_node *new_r_Not (ir_graph *irg, ir_node *block,
- ir_node *op, ir_mode *mode) {
- return new_rd_Not(NULL, irg, block, op, mode);
-}
-ir_node *new_r_Shl (ir_graph *irg, ir_node *block,
- ir_node *op, ir_node *k, ir_mode *mode) {
- return new_rd_Shl(NULL, irg, block, op, k, mode);
-}
-ir_node *new_r_Shr (ir_graph *irg, ir_node *block,
- ir_node *op, ir_node *k, ir_mode *mode) {
- return new_rd_Shr(NULL, irg, block, op, k, mode);
-}
-ir_node *new_r_Shrs (ir_graph *irg, ir_node *block,
- ir_node *op, ir_node *k, ir_mode *mode) {
- return new_rd_Shrs(NULL, irg, block, op, k, mode);
-}
-ir_node *new_r_Rot (ir_graph *irg, ir_node *block,
- ir_node *op, ir_node *k, ir_mode *mode) {
- return new_rd_Rot(NULL, irg, block, op, k, mode);
-}
-ir_node *new_r_Carry (ir_graph *irg, ir_node *block,
- ir_node *op, ir_node *k, ir_mode *mode) {
- return new_rd_Carry(NULL, irg, block, op, k, mode);
-}
-ir_node *new_r_Borrow (ir_graph *irg, ir_node *block,
- ir_node *op, ir_node *k, ir_mode *mode) {
- return new_rd_Borrow(NULL, irg, block, op, k, mode);
-}
-ir_node *new_r_Cmp (ir_graph *irg, ir_node *block,
- ir_node *op1, ir_node *op2) {
- return new_rd_Cmp(NULL, irg, block, op1, op2);
-}
-ir_node *new_r_Conv (ir_graph *irg, ir_node *block,
- ir_node *op, ir_mode *mode) {
- return new_rd_Conv(NULL, irg, block, op, mode);
-}
-ir_node *new_r_Cast (ir_graph *irg, ir_node *block, ir_node *op, ir_type *to_tp) {
- return new_rd_Cast(NULL, irg, block, op, to_tp);
-}
-ir_node *new_r_Phi (ir_graph *irg, ir_node *block, int arity,
- ir_node **in, ir_mode *mode) {
- return new_rd_Phi(NULL, irg, block, arity, in, mode);
-}
-ir_node *new_r_Load (ir_graph *irg, ir_node *block,
- ir_node *store, ir_node *adr, ir_mode *mode) {
- return new_rd_Load(NULL, irg, block, store, adr, mode);
-}
-ir_node *new_r_Store (ir_graph *irg, ir_node *block,
- ir_node *store, ir_node *adr, ir_node *val) {
- return new_rd_Store(NULL, irg, block, store, adr, val);
-}
-ir_node *new_r_Alloc (ir_graph *irg, ir_node *block, ir_node *store,
- ir_node *size, ir_type *alloc_type, where_alloc where) {
- return new_rd_Alloc(NULL, irg, block, store, size, alloc_type, where);
-}
-ir_node *new_r_Free (ir_graph *irg, ir_node *block, ir_node *store,
- ir_node *ptr, ir_node *size, ir_type *free_type, where_alloc where) {
- return new_rd_Free(NULL, irg, block, store, ptr, size, free_type, where);
-}
-ir_node *new_r_Sync (ir_graph *irg, ir_node *block, int arity, ir_node *in[]) {
- return new_rd_Sync(NULL, irg, block, arity, in);
-}
-ir_node *new_r_Proj (ir_graph *irg, ir_node *block, ir_node *arg,
- ir_mode *mode, long proj) {
- return new_rd_Proj(NULL, irg, block, arg, mode, proj);
-}
-ir_node *new_r_defaultProj (ir_graph *irg, ir_node *block, ir_node *arg,
- long max_proj) {
- return new_rd_defaultProj(NULL, irg, block, arg, max_proj);
-}
-ir_node *new_r_Tuple (ir_graph *irg, ir_node *block,
- int arity, ir_node **in) {
- return new_rd_Tuple(NULL, irg, block, arity, in );
-}
-ir_node *new_r_Id (ir_graph *irg, ir_node *block,
- ir_node *val, ir_mode *mode) {
- return new_rd_Id(NULL, irg, block, val, mode);
-}
-ir_node *new_r_Bad (ir_graph *irg) {
- return new_rd_Bad(irg);
-}
-ir_node *new_r_Confirm (ir_graph *irg, ir_node *block, ir_node *val, ir_node *bound, pn_Cmp cmp) {
- return new_rd_Confirm (NULL, irg, block, val, bound, cmp);
-}
-ir_node *new_r_Unknown (ir_graph *irg, ir_mode *m) {
- return new_rd_Unknown(irg, m);
-}
-ir_node *new_r_CallBegin (ir_graph *irg, ir_node *block, ir_node *callee) {
- return new_rd_CallBegin(NULL, irg, block, callee);
-}
-ir_node *new_r_EndReg (ir_graph *irg, ir_node *block) {
- return new_rd_EndReg(NULL, irg, block);
-}
-ir_node *new_r_EndExcept (ir_graph *irg, ir_node *block) {
- return new_rd_EndExcept(NULL, irg, block);
-}
-ir_node *new_r_Break (ir_graph *irg, ir_node *block) {
- return new_rd_Break(NULL, irg, block);
-}
-ir_node *new_r_Filter (ir_graph *irg, ir_node *block, ir_node *arg,
- ir_mode *mode, long proj) {
- return new_rd_Filter(NULL, irg, block, arg, mode, proj);
-}
-ir_node *new_r_NoMem (ir_graph *irg) {
- return new_rd_NoMem(irg);
-}
-ir_node *new_r_Mux (ir_graph *irg, ir_node *block,
- ir_node *sel, ir_node *ir_false, ir_node *ir_true, ir_mode *mode) {
- return new_rd_Mux(NULL, irg, block, sel, ir_false, ir_true, mode);
-}
-ir_node *new_r_Psi (ir_graph *irg, ir_node *block,
- int arity, ir_node *conds[], ir_node *vals[], ir_mode *mode) {
- return new_rd_Psi(NULL, irg, block, arity, conds, vals, mode);
-}
-ir_node *new_r_CopyB(ir_graph *irg, ir_node *block,
- ir_node *store, ir_node *dst, ir_node *src, ir_type *data_type) {
- return new_rd_CopyB(NULL, irg, block, store, dst, src, data_type);
-}
-ir_node *new_r_InstOf (ir_graph *irg, ir_node *block, ir_node *store, ir_node *objptr,
- ir_type *type) {
- return (new_rd_InstOf (NULL, irg, block, store, objptr, type));
-}
-ir_node *new_r_Raise (ir_graph *irg, ir_node *block,
- ir_node *store, ir_node *obj) {
- return new_rd_Raise(NULL, irg, block, store, obj);
-}
-ir_node *new_r_Bound(ir_graph *irg, ir_node *block,
- ir_node *store, ir_node *idx, ir_node *lower, ir_node *upper) {
- return new_rd_Bound(NULL, irg, block, store, idx, lower, upper);
-}
-ir_node *new_r_Pin(ir_graph *irg, ir_node *block, ir_node *node) {
- return new_rd_Pin(NULL, irg, block, node);
-}
-
-/** ********************/
-/** public interfaces */
-/** construction tools */
-
-/**
- *
- * - create a new Start node in the current block
- *
- * @return s - pointer to the created Start node
- *
- *
- */
-ir_node *
-new_d_Start(dbg_info *db)
-{
- ir_node *res;
-
- res = new_ir_node(db, current_ir_graph, current_ir_graph->current_block,
- op_Start, mode_T, 0, NULL);
- /* res->attr.start.irg = current_ir_graph; */
-
- res = optimize_node(res);
- IRN_VRFY_IRG(res, current_ir_graph);
- return res;
-} /* new_d_Start */
-
-ir_node *
-new_d_End(dbg_info *db)
-{
- ir_node *res;
- res = new_ir_node(db, current_ir_graph, current_ir_graph->current_block,
- op_End, mode_X, -1, NULL);
- res = optimize_node(res);
- IRN_VRFY_IRG(res, current_ir_graph);
-
- return res;
-} /* new_d_End */
-
-/* Constructs a Block with a fixed number of predecessors.
- Does set current_block. Can be used with automatic Phi
- node construction. */
-ir_node *
-new_d_Block(dbg_info *db, int arity, ir_node **in)
-{
- ir_node *res;
- int i;
- int has_unknown = 0;
-
- res = new_bd_Block(db, arity, in);
-
- /* Create and initialize array for Phi-node construction. */
- if (get_irg_phase_state(current_ir_graph) == phase_building) {
- res->attr.block.graph_arr = NEW_ARR_D(ir_node *, current_ir_graph->obst,
- current_ir_graph->n_loc);
- memset(res->attr.block.graph_arr, 0, sizeof(ir_node *)*current_ir_graph->n_loc);
- }
-
- for (i = arity-1; i >= 0; i--)
- if (get_irn_op(in[i]) == op_Unknown) {
- has_unknown = 1;
- break;
- }
-
- if (!has_unknown) res = optimize_node(res);
- current_ir_graph->current_block = res;
-
- IRN_VRFY_IRG(res, current_ir_graph);
-
- return res;
-} /* new_d_Block */
-
-/* ***********************************************************************/
-/* Methods necessary for automatic Phi node creation */
-/*
- ir_node *phi_merge (ir_node *block, int pos, ir_mode *mode, ir_node **nin, int ins)
- ir_node *get_r_value_internal (ir_node *block, int pos, ir_mode *mode);
- ir_node *new_rd_Phi0 (ir_graph *irg, ir_node *block, ir_mode *mode)
- ir_node *new_rd_Phi_in (ir_graph *irg, ir_node *block, ir_mode *mode, ir_node **in, int ins)
-
- Call Graph: ( A ---> B == A "calls" B)
-
- get_value mature_immBlock
- | |
- | |
- | |
- | ---> phi_merge
- | / / \
- | / / \
- \|/ / |/_ \
- get_r_value_internal |
- | |
- | |
- \|/ \|/
- new_rd_Phi0 new_rd_Phi_in
-
-* *************************************************************************** */
-
-/** Creates a Phi node with 0 predecessors. */
-static INLINE ir_node *
-new_rd_Phi0(ir_graph *irg, ir_node *block, ir_mode *mode)
-{
- ir_node *res;
-
- res = new_ir_node(NULL, irg, block, op_Phi, mode, 0, NULL);
- IRN_VRFY_IRG(res, irg);
- return res;
-} /* new_rd_Phi0 */
-
-/* There are two implementations of the Phi node construction. The first
- is faster, but does not work for blocks with more than 2 predecessors.
- The second works always but is slower and causes more unnecessary Phi
- nodes.
- Select the implementations by the following preprocessor flag set in
- common/common.h: */
-#if USE_FAST_PHI_CONSTRUCTION
-
-/* This is a stack used for allocating and deallocating nodes in
- new_rd_Phi_in. The original implementation used the obstack
- to model this stack, now it is explicit. This reduces side effects.
-*/
-#if USE_EXPLICIT_PHI_IN_STACK
-Phi_in_stack *
-new_Phi_in_stack(void) {
- Phi_in_stack *res;
-
- res = (Phi_in_stack *) malloc ( sizeof (Phi_in_stack));
-
- res->stack = NEW_ARR_F (ir_node *, 0);
- res->pos = 0;
-
- return res;
-} /* new_Phi_in_stack */
-
-void
-free_Phi_in_stack(Phi_in_stack *s) {
- DEL_ARR_F(s->stack);
- free(s);
-} /* free_Phi_in_stack */
-
-static INLINE void
-free_to_Phi_in_stack(ir_node *phi) {
- if (ARR_LEN(current_ir_graph->Phi_in_stack->stack) ==
- current_ir_graph->Phi_in_stack->pos)
- ARR_APP1 (ir_node *, current_ir_graph->Phi_in_stack->stack, phi);
- else
- current_ir_graph->Phi_in_stack->stack[current_ir_graph->Phi_in_stack->pos] = phi;
-
- (current_ir_graph->Phi_in_stack->pos)++;
-} /* free_to_Phi_in_stack */
-
-static INLINE ir_node *
-alloc_or_pop_from_Phi_in_stack(ir_graph *irg, ir_node *block, ir_mode *mode,
- int arity, ir_node **in) {
- ir_node *res;
- ir_node **stack = current_ir_graph->Phi_in_stack->stack;
- int pos = current_ir_graph->Phi_in_stack->pos;
-
-
- if (pos == 0) {
- /* We need to allocate a new node */
- res = new_ir_node (db, irg, block, op_Phi, mode, arity, in);
- res->attr.phi_backedge = new_backedge_arr(irg->obst, arity);
- } else {
- /* reuse the old node and initialize it again. */
- res = stack[pos-1];
-
- assert (res->kind == k_ir_node);
- assert (res->op == op_Phi);
- res->mode = mode;
- res->visited = 0;
- res->link = NULL;
- assert (arity >= 0);
- /* ???!!! How to free the old in array?? Not at all: on obstack ?!! */
- res->in = NEW_ARR_D (ir_node *, irg->obst, (arity+1));
- res->in[0] = block;
- memcpy (&res->in[1], in, sizeof (ir_node *) * arity);
-
- (current_ir_graph->Phi_in_stack->pos)--;
- }
- return res;
-} /* alloc_or_pop_from_Phi_in_stack */
-#endif /* USE_EXPLICIT_PHI_IN_STACK */
-
-/**
- * Creates a Phi node with a given, fixed array **in of predecessors.
- * If the Phi node is unnecessary, as the same value reaches the block
- * through all control flow paths, it is eliminated and the value
- * returned directly. This constructor is only intended for use in
- * the automatic Phi node generation triggered by get_value or mature.
- * The implementation is quite tricky and depends on the fact, that
- * the nodes are allocated on a stack:
- * The in array contains predecessors and NULLs. The NULLs appear,
- * if get_r_value_internal, that computed the predecessors, reached
- * the same block on two paths. In this case the same value reaches
- * this block on both paths, there is no definition in between. We need
- * not allocate a Phi where these path's merge, but we have to communicate
- * this fact to the caller. This happens by returning a pointer to the
- * node the caller _will_ allocate. (Yes, we predict the address. We can
- * do so because the nodes are allocated on the obstack.) The caller then
- * finds a pointer to itself and, when this routine is called again,
- * eliminates itself.
- */
-static INLINE ir_node *
-new_rd_Phi_in(ir_graph *irg, ir_node *block, ir_mode *mode, ir_node **in, int ins)
-{
- int i;
- ir_node *res, *known;
-
- /* Allocate a new node on the obstack. This can return a node to
- which some of the pointers in the in-array already point.
- Attention: the constructor copies the in array, i.e., the later
- changes to the array in this routine do not affect the
- constructed node! If the in array contains NULLs, there will be
- missing predecessors in the returned node. Is this a possible
- internal state of the Phi node generation? */
-#if USE_EXPLICIT_PHI_IN_STACK
- res = known = alloc_or_pop_from_Phi_in_stack(irg, block, mode, ins, in);
-#else
- res = known = new_ir_node (NULL, irg, block, op_Phi, mode, ins, in);
- res->attr.phi_backedge = new_backedge_arr(irg->obst, ins);
-#endif
-
- /* The in-array can contain NULLs. These were returned by
- get_r_value_internal if it reached the same block/definition on a
- second path. The NULLs are replaced by the node itself to
- simplify the test in the next loop. */
- for (i = 0; i < ins; ++i) {
- if (in[i] == NULL)
- in[i] = res;
- }
-
- /* This loop checks whether the Phi has more than one predecessor.
- If so, it is a real Phi node and we break the loop. Else the Phi
- node merges the same definition on several paths and therefore is
- not needed. */
- for (i = 0; i < ins; ++i) {
- if (in[i] == res || in[i] == known)
- continue;
-
- if (known == res)
- known = in[i];
- else
- break;
- }
-
- /* i==ins: there is at most one predecessor, we don't need a phi node. */
- if (i==ins) {
-#if USE_EXPLICIT_PHI_IN_STACK
- free_to_Phi_in_stack(res);
-#else
- edges_node_deleted(res, current_ir_graph);
- obstack_free(current_ir_graph->obst, res);
-#endif
- res = known;
- } else {
- res = optimize_node (res);
- IRN_VRFY_IRG(res, irg);
- }
-
- /* return the pointer to the Phi node. This node might be deallocated! */
- return res;
-} /* new_rd_Phi_in */
-
-static ir_node *
-get_r_value_internal(ir_node *block, int pos, ir_mode *mode);
-
-/**
- * Allocates and returns this node. The routine called to allocate the
- * node might optimize it away and return a real value, or even a pointer
- * to a deallocated Phi node on top of the obstack!
- * This function is called with an in-array of proper size.
- */
-static ir_node *
-phi_merge (ir_node *block, int pos, ir_mode *mode, ir_node **nin, int ins)
-{
- ir_node *prevBlock, *res;
- int i;
-
- /* This loop goes to all predecessor blocks of the block the Phi node is in
- and there finds the operands of the Phi node by calling
- get_r_value_internal. */
- for (i = 1; i <= ins; ++i) {
- assert (block->in[i]);
- prevBlock = block->in[i]->in[0]; /* go past control flow op to prev block */
- assert (prevBlock);
- nin[i-1] = get_r_value_internal (prevBlock, pos, mode);
- }
-
- /* After collecting all predecessors into the array nin a new Phi node
- with these predecessors is created. This constructor contains an
- optimization: If all predecessors of the Phi node are identical it
- returns the only operand instead of a new Phi node. If the value
- passes two different control flow edges without being defined, and
- this is the second path treated, a pointer to the node that will be
- allocated for the first path (recursion) is returned. We already
- know the address of this node, as it is the next node to be allocated
- and will be placed on top of the obstack. (The obstack is a _stack_!) */
- res = new_rd_Phi_in (current_ir_graph, block, mode, nin, ins);
-
- /* Now we now the value for "pos" and can enter it in the array with
- all known local variables. Attention: this might be a pointer to
- a node, that later will be allocated!!! See new_rd_Phi_in().
- If this is called in mature, after some set_value() in the same block,
- the proper value must not be overwritten:
- The call order
- get_value (makes Phi0, put's it into graph_arr)
- set_value (overwrites Phi0 in graph_arr)
- mature_immBlock (upgrades Phi0, puts it again into graph_arr, overwriting
- the proper value.)
- fails. */
- if (!block->attr.block.graph_arr[pos]) {
- block->attr.block.graph_arr[pos] = res;
- } else {
- /* printf(" value already computed by %s\n",
- get_id_str(block->attr.block.graph_arr[pos]->op->name)); */
- }
-
- return res;
-}
-
-/**
- * This function returns the last definition of a variable. In case
- * this variable was last defined in a previous block, Phi nodes are
- * inserted. If the part of the firm graph containing the definition
- * is not yet constructed, a dummy Phi node is returned.
- */
-static ir_node *
-get_r_value_internal(ir_node *block, int pos, ir_mode *mode)
-{
- ir_node *res;
- /* There are 4 cases to treat.
-
- 1. The block is not mature and we visit it the first time. We can not
- create a proper Phi node, therefore a Phi0, i.e., a Phi without
- predecessors is returned. This node is added to the linked list (field
- "link") of the containing block to be completed when this block is
- matured. (Completion will add a new Phi and turn the Phi0 into an Id
- node.)
-
- 2. The value is already known in this block, graph_arr[pos] is set and we
- visit the block the first time. We can return the value without
- creating any new nodes.
-
- 3. The block is mature and we visit it the first time. A Phi node needs
- to be created (phi_merge). If the Phi is not needed, as all it's
- operands are the same value reaching the block through different
- paths, it's optimized away and the value itself is returned.
-
- 4. The block is mature, and we visit it the second time. Now two
- subcases are possible:
- * The value was computed completely the last time we were here. This
- is the case if there is no loop. We can return the proper value.
- * The recursion that visited this node and set the flag did not
- return yet. We are computing a value in a loop and need to
- break the recursion without knowing the result yet.
- @@@ strange case. Straight forward we would create a Phi before
- starting the computation of it's predecessors. In this case we will
- find a Phi here in any case. The problem is that this implementation
- only creates a Phi after computing the predecessors, so that it is
- hard to compute self references of this Phi. @@@
- There is no simple check for the second subcase. Therefore we check
- for a second visit and treat all such cases as the second subcase.
- Anyways, the basic situation is the same: we reached a block
- on two paths without finding a definition of the value: No Phi
- nodes are needed on both paths.
- We return this information "Two paths, no Phi needed" by a very tricky
- implementation that relies on the fact that an obstack is a stack and
- will return a node with the same address on different allocations.
- Look also at phi_merge and new_rd_phi_in to understand this.
- @@@ Unfortunately this does not work, see testprogram
- three_cfpred_example.
-
- */
-
- /* case 4 -- already visited. */
- if (get_irn_visited(block) == get_irg_visited(current_ir_graph)) return NULL;
-
- /* visited the first time */
- set_irn_visited(block, get_irg_visited(current_ir_graph));
-
- /* Get the local valid value */
- res = block->attr.block.graph_arr[pos];
-
- /* case 2 -- If the value is actually computed, return it. */
- if (res) return res;
-
- if (block->attr.block.matured) { /* case 3 */
-
- /* The Phi has the same amount of ins as the corresponding block. */
- int ins = get_irn_arity(block);
- ir_node **nin;
- NEW_ARR_A (ir_node *, nin, ins);
-
- /* Phi merge collects the predecessors and then creates a node. */
- res = phi_merge (block, pos, mode, nin, ins);
-
- } else { /* case 1 */
- /* The block is not mature, we don't know how many in's are needed. A Phi
- with zero predecessors is created. Such a Phi node is called Phi0
- node. (There is also an obsolete Phi0 opcode.) The Phi0 is then added
- to the list of Phi0 nodes in this block to be matured by mature_immBlock
- later.
- The Phi0 has to remember the pos of it's internal value. If the real
- Phi is computed, pos is used to update the array with the local
- values. */
-
- res = new_rd_Phi0 (current_ir_graph, block, mode);
- res->attr.phi0_pos = pos;
- res->link = block->link;
- block->link = res;
- }
-
- /* If we get here, the frontend missed a use-before-definition error */
- if (!res) {
- /* Error Message */
- printf("Error: no value set. Use of undefined variable. Initializing to zero.\n");
- assert (mode->code >= irm_F && mode->code <= irm_P);
- res = new_rd_Const (NULL, current_ir_graph, block, mode,
- tarval_mode_null[mode->code]);
- }
-
- /* The local valid value is available now. */
- block->attr.block.graph_arr[pos] = res;
-
- return res;
-} /* get_r_value_internal */
-
-#else /* if 0 */
-
-/**
- it starts the recursion. This causes an Id at the entry of
- every block that has no definition of the value! **/
-
-#if USE_EXPLICIT_PHI_IN_STACK
-/* Just dummies */
-Phi_in_stack * new_Phi_in_stack() { return NULL; }
-void free_Phi_in_stack(Phi_in_stack *s) { }
-#endif
-
-static INLINE ir_node *
-new_rd_Phi_in(ir_graph *irg, ir_node *block, ir_mode *mode,
- ir_node **in, int ins, ir_node *phi0)
-{
- int i;
- ir_node *res, *known;
-
- /* Allocate a new node on the obstack. The allocation copies the in
- array. */
- res = new_ir_node (NULL, irg, block, op_Phi, mode, ins, in);
- res->attr.phi_backedge = new_backedge_arr(irg->obst, ins);
-
- /* This loop checks whether the Phi has more than one predecessor.
- If so, it is a real Phi node and we break the loop. Else the
- Phi node merges the same definition on several paths and therefore
- is not needed. Don't consider Bad nodes! */
- known = res;
- for (i=0; i < ins; ++i)
- {
- assert(in[i]);
-
- in[i] = skip_Id(in[i]); /* increases the number of freed Phis. */
-
- /* Optimize self referencing Phis: We can't detect them yet properly, as
- they still refer to the Phi0 they will replace. So replace right now. */
- if (phi0 && in[i] == phi0) in[i] = res;
-
- if (in[i]==res || in[i]==known || is_Bad(in[i])) continue;
-
- if (known==res)
- known = in[i];
- else
- break;
- }
-
- /* i==ins: there is at most one predecessor, we don't need a phi node. */
- if (i == ins) {
- if (res != known) {
- edges_node_deleted(res, current_ir_graph);
- obstack_free (current_ir_graph->obst, res);
- if (is_Phi(known)) {
- /* If pred is a phi node we want to optimize it: If loops are matured in a bad
- order, an enclosing Phi know may get superfluous. */
- res = optimize_in_place_2(known);
- if (res != known)
- exchange(known, res);
-
- }
- else
- res = known;
- } else {
- /* A undefined value, e.g., in unreachable code. */
- res = new_Bad();
- }
- } else {
- res = optimize_node (res); /* This is necessary to add the node to the hash table for cse. */
- IRN_VRFY_IRG(res, irg);
- /* Memory Phis in endless loops must be kept alive.
- As we can't distinguish these easily we keep all of them alive. */
- if ((res->op == op_Phi) && (mode == mode_M))
- add_End_keepalive(get_irg_end(irg), res);
- }
-
- return res;
-} /* new_rd_Phi_in */
-
-static ir_node *
-get_r_value_internal (ir_node *block, int pos, ir_mode *mode);
-
-#if PRECISE_EXC_CONTEXT