1 /* Functions for high level gimple building routines.
2 Copyright (C) 2013-2016 Free Software Foundation, Inc.
3
4 This file is part of GCC.
5
6 GCC is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3, or (at your option)
9 any later version.
10
11 GCC is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
15
16 You should have received a copy of the GNU General Public License
17 along with GCC; see the file COPYING3. If not see
18 <http://www.gnu.org/licenses/>. */
19
20 #include "config.h"
21 #include "system.h"
22 #include "coretypes.h"
23 #include "backend.h"
24 #include "tree.h"
25 #include "gimple.h"
26 #include "stringpool.h"
27 #include "tree-ssanames.h"
28
29
30 /* Return the expression type to use based on the CODE and type of
31 the given operand OP. If the expression CODE is a comparison,
32 the returned type is boolean_type_node. Otherwise, it returns
33 the type of OP. */
34
35 static tree
get_expr_type(enum tree_code code,tree op)36 get_expr_type (enum tree_code code, tree op)
37 {
38 return (TREE_CODE_CLASS (code) == tcc_comparison)
39 ? boolean_type_node
40 : TREE_TYPE (op);
41 }
42
43
44 /* Build a new gimple assignment. The LHS of the assignment is a new
45 temporary whose type matches the given expression. MODE indicates
46 whether the LHS should be an SSA or a normal temporary. CODE is
47 the expression code for the RHS. OP1 is the first operand and VAL
48 is an integer value to be used as the second operand. */
49
50 gassign *
build_assign(enum tree_code code,tree op1,int val,tree lhs)51 build_assign (enum tree_code code, tree op1, int val, tree lhs)
52 {
53 tree op2 = build_int_cst (TREE_TYPE (op1), val);
54 if (lhs == NULL_TREE)
55 lhs = make_ssa_name (get_expr_type (code, op1));
56 return gimple_build_assign (lhs, code, op1, op2);
57 }
58
59 gassign *
build_assign(enum tree_code code,gimple * g,int val,tree lhs)60 build_assign (enum tree_code code, gimple *g, int val, tree lhs )
61 {
62 return build_assign (code, gimple_assign_lhs (g), val, lhs);
63 }
64
65
66 /* Build and return a new GIMPLE assignment. The new assignment will
67 have the opcode CODE and operands OP1 and OP2. The type of the
68 expression on the RHS is inferred to be the type of OP1.
69
70 The LHS of the statement will be an SSA name or a GIMPLE temporary
71 in normal form depending on the type of builder invoking this
72 function. */
73
74 gassign *
build_assign(enum tree_code code,tree op1,tree op2,tree lhs)75 build_assign (enum tree_code code, tree op1, tree op2, tree lhs)
76 {
77 if (lhs == NULL_TREE)
78 lhs = make_ssa_name (get_expr_type (code, op1));
79 return gimple_build_assign (lhs, code, op1, op2);
80 }
81
82 gassign *
build_assign(enum tree_code code,gimple * op1,tree op2,tree lhs)83 build_assign (enum tree_code code, gimple *op1, tree op2, tree lhs)
84 {
85 return build_assign (code, gimple_assign_lhs (op1), op2, lhs);
86 }
87
88 gassign *
build_assign(enum tree_code code,tree op1,gimple * op2,tree lhs)89 build_assign (enum tree_code code, tree op1, gimple *op2, tree lhs)
90 {
91 return build_assign (code, op1, gimple_assign_lhs (op2), lhs);
92 }
93
94 gassign *
build_assign(enum tree_code code,gimple * op1,gimple * op2,tree lhs)95 build_assign (enum tree_code code, gimple *op1, gimple *op2, tree lhs)
96 {
97 return build_assign (code, gimple_assign_lhs (op1), gimple_assign_lhs (op2),
98 lhs);
99 }
100
101
102 /* Create and return a type cast assignment. This creates a NOP_EXPR
103 that converts OP to TO_TYPE. */
104
105 gassign *
build_type_cast(tree to_type,tree op,tree lhs)106 build_type_cast (tree to_type, tree op, tree lhs)
107 {
108 if (lhs == NULL_TREE)
109 lhs = make_ssa_name (to_type);
110 return gimple_build_assign (lhs, NOP_EXPR, op);
111 }
112
113 gassign *
build_type_cast(tree to_type,gimple * op,tree lhs)114 build_type_cast (tree to_type, gimple *op, tree lhs)
115 {
116 return build_type_cast (to_type, gimple_assign_lhs (op), lhs);
117 }
118
119
120
121