1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
|
gb_internal cgValue cg_typeid(cgModule *m, Type *t) {
GB_ASSERT("TODO(bill): cg_typeid");
return {};
}
gb_internal cgValue cg_emit_conv(cgProcedure *p, cgValue value, Type *type) {
// TODO(bill): cg_emit_conv
return value;
}
gb_internal cgValue cg_emit_transmute(cgProcedure *p, cgValue value, Type *type) {
GB_ASSERT(type_size_of(value.type) == type_size_of(type));
if (value.kind == cgValue_Symbol) {
GB_ASSERT(is_type_pointer(value.type));
value = cg_value(tb_inst_get_symbol_address(p->func, value.symbol), type);
}
i64 src_align = type_align_of(value.type);
i64 dst_align = type_align_of(type);
if (dst_align > src_align) {
cgAddr local = cg_add_local(p, type, nullptr, false);
cgValue dst = local.addr;
dst.type = alloc_type_pointer(value.type);
cg_emit_store(p, dst, value);
return cg_addr_load(p, local);
}
TB_DataType dt = cg_data_type(type);
switch (value.kind) {
case cgValue_Value:
GB_ASSERT(!TB_IS_VOID_TYPE(dt));
value.type = type;
value.node = tb_inst_bitcast(p->func, value.node, dt);
return value;
case cgValue_Addr:
value.type = type;
return value;
case cgValue_Symbol:
GB_PANIC("should be handled above");
break;
}
return value;
}
gb_internal cgValue cg_build_expr_internal(cgProcedure *p, Ast *expr);
gb_internal cgValue cg_build_expr(cgProcedure *p, Ast *expr) {
u16 prev_state_flags = p->state_flags;
defer (p->state_flags = prev_state_flags);
if (expr->state_flags != 0) {
u16 in = expr->state_flags;
u16 out = p->state_flags;
if (in & StateFlag_bounds_check) {
out |= StateFlag_bounds_check;
out &= ~StateFlag_no_bounds_check;
} else if (in & StateFlag_no_bounds_check) {
out |= StateFlag_no_bounds_check;
out &= ~StateFlag_bounds_check;
}
if (in & StateFlag_type_assert) {
out |= StateFlag_type_assert;
out &= ~StateFlag_no_type_assert;
} else if (in & StateFlag_no_type_assert) {
out |= StateFlag_no_type_assert;
out &= ~StateFlag_type_assert;
}
p->state_flags = out;
}
// IMPORTANT NOTE(bill):
// Selector Call Expressions (foo->bar(...))
// must only evaluate `foo` once as it gets transformed into
// `foo.bar(foo, ...)`
// And if `foo` is a procedure call or something more complex, storing the value
// once is a very good idea
// If a stored value is found, it must be removed from the cache
if (expr->state_flags & StateFlag_SelectorCallExpr) {
// cgValue *pp = map_get(&p->selector_values, expr);
// if (pp != nullptr) {
// cgValue res = *pp;
// map_remove(&p->selector_values, expr);
// return res;
// }
// cgAddr *pa = map_get(&p->selector_addr, expr);
// if (pa != nullptr) {
// cgAddr res = *pa;
// map_remove(&p->selector_addr, expr);
// return cg_addr_load(p, res);
// }
}
cgValue res = cg_build_expr_internal(p, expr);
if (res.kind == cgValue_Symbol) {
GB_ASSERT(is_type_pointer(res.type));
res = cg_value(tb_inst_get_symbol_address(p->func, res.symbol), res.type);
}
if (expr->state_flags & StateFlag_SelectorCallExpr) {
// map_set(&p->selector_values, expr, res);
}
return res;
}
gb_internal cgValue cg_build_expr_internal(cgProcedure *p, Ast *expr) {
cgModule *m = p->module;
expr = unparen_expr(expr);
TokenPos expr_pos = ast_token(expr).pos;
TypeAndValue tv = type_and_value_of_expr(expr);
Type *type = type_of_expr(expr);
GB_ASSERT_MSG(tv.mode != Addressing_Invalid, "invalid expression '%s' (tv.mode = %d, tv.type = %s) @ %s\n Current Proc: %.*s : %s", expr_to_string(expr), tv.mode, type_to_string(tv.type), token_pos_to_string(expr_pos), LIT(p->name), type_to_string(p->type));
if (tv.value.kind != ExactValue_Invalid) {
// NOTE(bill): The commented out code below is just for debug purposes only
// if (is_type_untyped(type)) {
// gb_printf_err("%s %s : %s @ %p\n", token_pos_to_string(expr_pos), expr_to_string(expr), type_to_string(expr->tav.type), expr);
// GB_PANIC("%s\n", type_to_string(tv.type));
// }
// NOTE(bill): Short on constant values
return cg_const_value(p, type, tv.value);
} else if (tv.mode == Addressing_Type) {
// NOTE(bill, 2023-01-16): is this correct? I hope so at least
return cg_typeid(m, tv.type);
}
switch (expr->kind) {
case_ast_node(bl, BasicLit, expr);
TokenPos pos = bl->token.pos;
GB_PANIC("Non-constant basic literal %s - %.*s", token_pos_to_string(pos), LIT(token_strings[bl->token.kind]));
case_end;
case_ast_node(bd, BasicDirective, expr);
TokenPos pos = bd->token.pos;
GB_PANIC("Non-constant basic literal %s - %.*s", token_pos_to_string(pos), LIT(bd->name.string));
case_end;
case_ast_node(i, Ident, expr);
Entity *e = entity_from_expr(expr);
e = strip_entity_wrapping(e);
GB_ASSERT_MSG(e != nullptr, "%s in %.*s %p", expr_to_string(expr), LIT(p->name), expr);
if (e->kind == Entity_Builtin) {
Token token = ast_token(expr);
GB_PANIC("TODO(bill): lb_build_expr Entity_Builtin '%.*s'\n"
"\t at %s", LIT(builtin_procs[e->Builtin.id].name),
token_pos_to_string(token.pos));
return {};
} else if (e->kind == Entity_Nil) {
// TODO(bill): is this correct?
return cg_value(cast(TB_Node *)nullptr, e->type);
}
GB_ASSERT(e->kind != Entity_ProcGroup);
// return cg_find_ident(p, m, e, expr);
GB_PANIC("TODO: cg_find_ident");
return {};
case_end;
case_ast_node(i, Implicit, expr);
return cg_addr_load(p, cg_build_addr(p, expr));
case_end;
case_ast_node(u, Uninit, expr);
if (is_type_untyped(type)) {
return cg_value(cast(TB_Node *)nullptr, t_untyped_uninit);
}
return cg_value(tb_inst_poison(p->func), type);
case_end;
case_ast_node(de, DerefExpr, expr);
return cg_addr_load(p, cg_build_addr(p, expr));
case_end;
case_ast_node(se, SelectorExpr, expr);
TypeAndValue tav = type_and_value_of_expr(expr);
GB_ASSERT(tav.mode != Addressing_Invalid);
return cg_addr_load(p, cg_build_addr(p, expr));
case_end;
case_ast_node(ise, ImplicitSelectorExpr, expr);
TypeAndValue tav = type_and_value_of_expr(expr);
GB_ASSERT(tav.mode == Addressing_Constant);
return cg_const_value(p, type, tv.value);
case_end;
case_ast_node(se, SelectorCallExpr, expr);
GB_ASSERT(se->modified_call);
return cg_build_call_expr(p, se->call);
case_end;
case_ast_node(i, CallExpr, expr);
return cg_build_call_expr(p, expr);
case_end;
case_ast_node(te, TernaryIfExpr, expr);
GB_PANIC("TODO(bill): TernaryIfExpr");
case_end;
case_ast_node(te, TernaryWhenExpr, expr);
TypeAndValue tav = type_and_value_of_expr(te->cond);
GB_ASSERT(tav.mode == Addressing_Constant);
GB_ASSERT(tav.value.kind == ExactValue_Bool);
if (tav.value.value_bool) {
return cg_build_expr(p, te->x);
} else {
return cg_build_expr(p, te->y);
}
case_end;
case_ast_node(tc, TypeCast, expr);
cgValue e = cg_build_expr(p, tc->expr);
switch (tc->token.kind) {
case Token_cast:
return cg_emit_conv(p, e, type);
case Token_transmute:
return cg_emit_transmute(p, e, type);
}
GB_PANIC("Invalid AST TypeCast");
case_end;
case_ast_node(ac, AutoCast, expr);
cgValue value = cg_build_expr(p, ac->expr);
return cg_emit_conv(p, value, type);
case_end;
}
GB_PANIC("TODO(bill): cg_build_expr_internal %.*s", LIT(ast_strings[expr->kind]));
return {};
}
gb_internal cgAddr cg_build_addr(cgProcedure *p, Ast *expr) {
return {};
}
|
