diff options
Diffstat (limited to 'gcc/tree-ssa-dce.c')
| -rw-r--r-- | gcc/tree-ssa-dce.c | 31 |
1 files changed, 8 insertions, 23 deletions
diff --git a/gcc/tree-ssa-dce.c b/gcc/tree-ssa-dce.c index 111f540..1041858 100644 --- a/gcc/tree-ssa-dce.c +++ b/gcc/tree-ssa-dce.c @@ -276,12 +276,11 @@ mark_operand_necessary (tree op) static void mark_stmt_if_obviously_necessary (tree stmt, bool aggressive) { - def_optype defs; v_may_def_optype v_may_defs; v_must_def_optype v_must_defs; stmt_ann_t ann; - size_t i; - tree op; + tree op, def; + ssa_op_iter iter; /* Statements that are implicitly live. Most function calls, asm and return statements are required. Labels and BIND_EXPR nodes are kept because @@ -370,10 +369,8 @@ mark_stmt_if_obviously_necessary (tree stmt, bool aggressive) get_stmt_operands (stmt); - defs = DEF_OPS (ann); - for (i = 0; i < NUM_DEFS (defs); i++) + FOR_EACH_SSA_TREE_OPERAND (def, stmt, iter, SSA_OP_DEF) { - tree def = DEF_OP (defs, i); if (is_global_var (SSA_NAME_VAR (def))) { mark_stmt_necessary (stmt, true); @@ -627,30 +624,18 @@ propagate_necessity (struct edge_list *el) /* Propagate through the operands. Examine all the USE, VUSE and V_MAY_DEF operands in this statement. Mark all the statements which feed this statement's uses as necessary. */ - vuse_optype vuses; - v_may_def_optype v_may_defs; - use_optype uses; - stmt_ann_t ann; - size_t k; + ssa_op_iter iter; + tree use; get_stmt_operands (i); - ann = stmt_ann (i); - - uses = USE_OPS (ann); - for (k = 0; k < NUM_USES (uses); k++) - mark_operand_necessary (USE_OP (uses, k)); - - vuses = VUSE_OPS (ann); - for (k = 0; k < NUM_VUSES (vuses); k++) - mark_operand_necessary (VUSE_OP (vuses, k)); /* The operands of V_MAY_DEF expressions are also needed as they represent potential definitions that may reach this statement (V_MAY_DEF operands allow us to follow def-def links). */ - v_may_defs = V_MAY_DEF_OPS (ann); - for (k = 0; k < NUM_V_MAY_DEFS (v_may_defs); k++) - mark_operand_necessary (V_MAY_DEF_OP (v_may_defs, k)); + + FOR_EACH_SSA_TREE_OPERAND (use, i, iter, SSA_OP_ALL_USES) + mark_operand_necessary (use); } } } |