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
|
#include <assert.h>
#include <stdlib.h>
#include <string.h>
#include <llvm-c/Analysis.h>
#include <llvm-c/Core.h>
#include "alloc.h"
#include "codegen.h"
#include "common.h"
#include "errors.h"
#include "parser.h"
#include "types.h"
static size_t codegenstmt(LLVMBuilderRef, struct ast, struct lexemes,
size_t);
static size_t codegenexpr(LLVMBuilderRef, struct ast, struct lexemes,
size_t, LLVMValueRef *)
__attribute__((nonnull));
void
codegen(struct ast ast, struct lexemes toks)
{
LLVMModuleRef mod = LLVMModuleCreateWithName("oryx");
LLVMBuilderRef builder = LLVMCreateBuilder();
for (size_t i = 0; i < ast.len;) {
switch (ast.kinds[i]) {
case ASTDECL: {
/* TODO: Temporary allocator */
struct strview sv = toks.strs[ast.lexemes[i]];
char *name = bufalloc(NULL, sv.len + 1, 1);
((uchar *)memcpy(name, sv.p, sv.len))[sv.len] = 0;
LLVMValueRef globl, val;
globl = LLVMAddGlobal(mod, LLVMInt64Type(), name);
i = codegenexpr(builder, ast, toks, ast.kids[i].rhs, &val);
LLVMSetInitializer(globl, val);
free(name);
break;
}
case ASTCDECL: {
idx_t_ expr = ast.kids[i].rhs;
if (ast.kinds[expr] != ASTFN) {
assert(!"not implemented");
__builtin_unreachable();
}
idx_t_ proto = ast.kids[expr].lhs, body = ast.kids[expr].rhs;
LLVMTypeRef ret;
LLVMTypeRef params[] = {0};
if (ast.kids[proto].rhs == AST_EMPTY)
ret = LLVMVoidType();
else {
size_t type = ast.kids[proto].rhs;
struct strview sv = toks.strs[ast.lexemes[type]];
/* TODO: Make int 32bit on 32bit platforms */
if (strncmp("int", sv.p, sv.len) == 0)
ret = LLVMInt64Type();
else
err("codegen: Unknown type: %.*s", (int)sv.len, sv.p);
}
LLVMTypeRef fnproto = LLVMFunctionType(ret, params, 0, false);
struct strview sv = toks.strs[ast.lexemes[i]];
char *fnname = bufalloc(NULL, sv.len + 1, 1);
((char *)memcpy(fnname, sv.p, sv.len))[sv.len] = 0;
LLVMValueRef fn = LLVMAddFunction(mod, fnname, fnproto);
LLVMBasicBlockRef entry = LLVMAppendBasicBlock(fn, "entry");
LLVMPositionBuilderAtEnd(builder, entry);
free(fnname);
for (i = ast.kids[body].lhs; i <= ast.kids[body].rhs;)
i = codegenstmt(builder, ast, toks, i);
break;
}
default:
err("codegen: Expected declaration");
}
}
LLVMDisposeBuilder(builder);
char *error = NULL;
LLVMVerifyModule(mod, LLVMAbortProcessAction, &error);
LLVMDisposeMessage(error);
LLVMDumpModule(mod);
LLVMDisposeModule(mod);
}
size_t
codegenstmt(LLVMBuilderRef builder, struct ast ast, struct lexemes toks,
size_t i)
{
switch (ast.kinds[i]) {
case ASTRET:
if (ast.kids[i].rhs == AST_EMPTY) {
LLVMBuildRetVoid(builder);
return i + 1;
}
LLVMValueRef v;
i = codegenexpr(builder, ast, toks, ast.kids[i].rhs, &v);
LLVMBuildRet(builder, v);
return i;
}
assert(!"unreachable");
__builtin_unreachable();
}
size_t
codegenexpr(LLVMBuilderRef builder, struct ast ast, struct lexemes toks,
size_t i, LLVMValueRef *v)
{
(void)builder;
switch (ast.kinds[i]) {
case ASTNUMLIT: {
/* TODO: Arbitrary precision? */
struct strview sv = toks.strs[ast.lexemes[i]];
/* TODO: Temporary one-time-use allocator? */
size_t len = 0;
char *p = bufalloc(NULL, sv.len, 1);
for (size_t i = 0; i < sv.len; i++) {
if (sv.p[i] != '\'')
p[len++] = sv.p[i];
}
*v = LLVMConstIntOfStringAndSize(LLVMInt64Type(), p, len, 10);
free(p);
return i + 1;
}
}
assert(!"unreachable");
__builtin_unreachable();
}
|
