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ff2a63a7 | 1 | /* Functions for high level gimple building routines. |
8d9254fc | 2 | Copyright (C) 2013-2020 Free Software Foundation, Inc. |
ff2a63a7 AM |
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" | |
c7131fb2 | 23 | #include "backend.h" |
ff2a63a7 | 24 | #include "tree.h" |
c7131fb2 | 25 | #include "gimple.h" |
d8a2d370 | 26 | #include "stringpool.h" |
f90aa46c | 27 | #include "tree-vrp.h" |
442b4905 | 28 | #include "tree-ssanames.h" |
ff2a63a7 AM |
29 | |
30 | ||
31 | /* Return the expression type to use based on the CODE and type of | |
32 | the given operand OP. If the expression CODE is a comparison, | |
33 | the returned type is boolean_type_node. Otherwise, it returns | |
34 | the type of OP. */ | |
35 | ||
36 | static tree | |
37 | get_expr_type (enum tree_code code, tree op) | |
38 | { | |
39 | return (TREE_CODE_CLASS (code) == tcc_comparison) | |
40 | ? boolean_type_node | |
41 | : TREE_TYPE (op); | |
42 | } | |
43 | ||
44 | ||
45 | /* Build a new gimple assignment. The LHS of the assignment is a new | |
46 | temporary whose type matches the given expression. MODE indicates | |
47 | whether the LHS should be an SSA or a normal temporary. CODE is | |
48 | the expression code for the RHS. OP1 is the first operand and VAL | |
49 | is an integer value to be used as the second operand. */ | |
50 | ||
538dd0b7 | 51 | gassign * |
ff2a63a7 AM |
52 | build_assign (enum tree_code code, tree op1, int val, tree lhs) |
53 | { | |
54 | tree op2 = build_int_cst (TREE_TYPE (op1), val); | |
55 | if (lhs == NULL_TREE) | |
b731b390 | 56 | lhs = make_ssa_name (get_expr_type (code, op1)); |
0d0e4a03 | 57 | return gimple_build_assign (lhs, code, op1, op2); |
ff2a63a7 AM |
58 | } |
59 | ||
538dd0b7 | 60 | gassign * |
355fe088 | 61 | build_assign (enum tree_code code, gimple *g, int val, tree lhs ) |
ff2a63a7 AM |
62 | { |
63 | return build_assign (code, gimple_assign_lhs (g), val, lhs); | |
64 | } | |
65 | ||
66 | ||
67 | /* Build and return a new GIMPLE assignment. The new assignment will | |
68 | have the opcode CODE and operands OP1 and OP2. The type of the | |
69 | expression on the RHS is inferred to be the type of OP1. | |
70 | ||
71 | The LHS of the statement will be an SSA name or a GIMPLE temporary | |
72 | in normal form depending on the type of builder invoking this | |
73 | function. */ | |
74 | ||
538dd0b7 | 75 | gassign * |
ff2a63a7 AM |
76 | build_assign (enum tree_code code, tree op1, tree op2, tree lhs) |
77 | { | |
78 | if (lhs == NULL_TREE) | |
b731b390 | 79 | lhs = make_ssa_name (get_expr_type (code, op1)); |
0d0e4a03 | 80 | return gimple_build_assign (lhs, code, op1, op2); |
ff2a63a7 AM |
81 | } |
82 | ||
538dd0b7 | 83 | gassign * |
355fe088 | 84 | build_assign (enum tree_code code, gimple *op1, tree op2, tree lhs) |
ff2a63a7 AM |
85 | { |
86 | return build_assign (code, gimple_assign_lhs (op1), op2, lhs); | |
87 | } | |
88 | ||
538dd0b7 | 89 | gassign * |
355fe088 | 90 | build_assign (enum tree_code code, tree op1, gimple *op2, tree lhs) |
ff2a63a7 AM |
91 | { |
92 | return build_assign (code, op1, gimple_assign_lhs (op2), lhs); | |
93 | } | |
94 | ||
538dd0b7 | 95 | gassign * |
355fe088 | 96 | build_assign (enum tree_code code, gimple *op1, gimple *op2, tree lhs) |
ff2a63a7 AM |
97 | { |
98 | return build_assign (code, gimple_assign_lhs (op1), gimple_assign_lhs (op2), | |
99 | lhs); | |
100 | } | |
101 | ||
102 | ||
103 | /* Create and return a type cast assignment. This creates a NOP_EXPR | |
104 | that converts OP to TO_TYPE. */ | |
105 | ||
538dd0b7 | 106 | gassign * |
ff2a63a7 AM |
107 | build_type_cast (tree to_type, tree op, tree lhs) |
108 | { | |
109 | if (lhs == NULL_TREE) | |
b731b390 | 110 | lhs = make_ssa_name (to_type); |
0d0e4a03 | 111 | return gimple_build_assign (lhs, NOP_EXPR, op); |
ff2a63a7 AM |
112 | } |
113 | ||
538dd0b7 | 114 | gassign * |
355fe088 | 115 | build_type_cast (tree to_type, gimple *op, tree lhs) |
ff2a63a7 AM |
116 | { |
117 | return build_type_cast (to_type, gimple_assign_lhs (op), lhs); | |
118 | } | |
119 | ||
120 | ||
121 |