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#include <ctype.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <gmp.h>
#include <llvm-c/Analysis.h>
#include <llvm-c/Core.h>
#include <llvm-c/ExecutionEngine.h>
#include "alloc.h"
#include "analyzer.h"
#include "common.h"
#include "errors.h"
#include "strview.h"
#define lengthof(xs) (sizeof(xs) / sizeof(*(xs)))
/* A context structure we can pass to all the codegen functions just so they
have easy access to everything */
struct cgctx {
arena a;
LLVMContextRef ctx;
LLVMModuleRef mod;
LLVMBuilderRef bob;
struct strview namespace;
};
static LLVMTypeRef type2llvm(struct cgctx, struct type);
// static void str2val(mpq_t, struct strview);
// static struct val *cvmap_insert(cvmap **, struct strview, arena *)
// __attribute__((nonnull(1)));
static void codegenast(struct cgctx, mpq_t *, struct type *, struct ast,
struct lexemes)
__attribute__((nonnull));
void
codegen(const char *file, mpq_t *folds, struct scope *scps, struct type *types,
struct ast ast, struct lexemes toks)
{
(void)scps;
char *triple = LLVMGetDefaultTargetTriple();
struct cgctx ctx;
ctx.a = NULL;
ctx.namespace.p = NULL;
ctx.ctx = LLVMContextCreate();
ctx.mod = LLVMModuleCreateWithNameInContext("oryx", ctx.ctx);
ctx.bob = LLVMCreateBuilderInContext(ctx.ctx);
LLVMSetSourceFileName(ctx.mod, file, strlen(file));
LLVMSetTarget(ctx.mod, triple);
LLVMDisposeMessage(triple);
codegenast(ctx, folds, types, ast, toks);
arena_free(&ctx.a);
LLVMDisposeBuilder(ctx.bob);
char *error = NULL;
if (LLVMVerifyModule(ctx.mod, LLVMReturnStatusAction, &error) == 1)
err("codegen: %s", error);
LLVMDisposeMessage(error);
LLVMDumpModule(ctx.mod);
LLVMDisposeModule(ctx.mod);
LLVMContextDispose(ctx.ctx);
}
idx_t_
codegenfunc(struct cgctx ctx, mpq_t *folds, struct type *types, struct ast ast,
struct lexemes toks, idx_t_ i, const char *name)
{
LLVMTypeRef ret = type2llvm(ctx, types[ast.kids[i].rhs]);
LLVMTypeRef ft = LLVMFunctionType(ret, NULL, 0, false);
LLVMValueRef fn = LLVMAddFunction(ctx.mod, name, ft);
LLVMBasicBlockRef entry = LLVMAppendBasicBlock(fn, "entry");
struct pair p = ast.kids[i];
// for (i = p.lhs; i <= p.rhs; i = codegenstmt(ctx, folds, types, ast, toks, i))
// ;
return fwdnode(ast, p.rhs);
}
idx_t_
codegendecl(struct cgctx ctx, mpq_t *folds, struct type *types, struct ast ast,
struct lexemes toks, idx_t_ i)
{
/* Constants are purely a compiler concept; they aren’t generated
into anything */
if (ast.kinds[i] == ASTCDECL)
return fwdnode(ast, i);
struct pair p = ast.kids[i];
if (ast.kinds[p.rhs] == ASTFN) {
struct strview sv = toks.strs[ast.lexemes[i]];
/* TODO: Namespace the name */
/* TODO: Temporary allocator */
char *name = bufalloc(NULL, sv.len + 1, 1);
svtocstr(name, sv);
i = codegenfunc(ctx, folds, types, ast, toks, p.rhs, name);
free(name);
return i;
} else if (!types[i].isfloat) {
struct strview sv = toks.strs[ast.lexemes[i]];
/* TODO: Namespace the name */
/* TODO: Temporary allocator */
char *name = bufalloc(NULL, sv.len + 1, 1);
LLVMTypeRef t = type2llvm(ctx, types[i]);
LLVMValueRef globl = LLVMAddGlobal(ctx.mod, t, svtocstr(name, sv));
free(name);
#if DEBUG /* Assert that the fold is an integer */
mpz_t den;
mpq_canonicalize(folds[p.rhs]);
mpq_get_den(den, folds[p.rhs]);
assert(mpz_cmp_si(den, 1) == 0);
mpz_clear(den);
#endif
/* The max value of a u128 is length 39 */
char buf[40];
mpq_get_str(buf, 10, folds[p.rhs]);
LLVMSetInitializer(globl, LLVMConstIntOfString(t, buf, 10));
LLVMSetLinkage(globl, LLVMInternalLinkage);
return fwdnode(ast, i);
} else /* && types[i].isfloat */
err("%s():%d: TODO", __func__, __LINE__);
}
void
codegenast(struct cgctx ctx, mpq_t *folds, struct type *types, struct ast ast,
struct lexemes toks)
{
for (idx_t_ i = 0; i < ast.len;
i = codegendecl(ctx, folds, types, ast, toks, i))
;
}
LLVMTypeRef
type2llvm(struct cgctx ctx, struct type t)
{
switch (t.kind) {
case TYPE_FN:
err("codegen: %s: Not implemented for function types", __func__);
case TYPE_NUM:
if (t.isfloat) {
switch (t.size) {
case 2: return LLVMHalfTypeInContext(ctx.ctx);
case 4: return LLVMFloatTypeInContext(ctx.ctx);
case 0:
case 8: return LLVMDoubleTypeInContext(ctx.ctx);
case 16: return LLVMFP128TypeInContext(ctx.ctx);
default: __builtin_unreachable();
}
}
/* TODO: Arbitrary precision */
if (t.size == 0)
return LLVMInt64TypeInContext(ctx.ctx);
assert((unsigned)t.size * 8 <= UINT8_MAX);
return LLVMIntTypeInContext(ctx.ctx, t.size * 8);
default:
__builtin_unreachable();
}
}
// void
// str2val(mpq_t rop, struct strview sv)
// {
// mpq_init(rop);
// char *clean = bufalloc(NULL, sv.len + 1, 1);
// size_t len = 0;
//
// for (size_t i = 0; i < sv.len; i++) {
// if (isdigit(sv.p[i]))
// clean[len++] = sv.p[i];
// }
// clean[len] = 0;
//
// mpq_set_str(rop, clean, 10);
//
// free(clean);
// }
//
// struct val *
// cvmap_insert(cvmap **m, struct strview k, arena *a)
// {
// for (uint64_t h = strview_hash(k); *m; h <<= 2) {
// if (strview_eq(k, (*m)->key))
// return &(*m)->val;
// m = &(*m)->child[h >> 62];
// }
// if (a == NULL)
// return NULL;
// *m = arena_new(a, cvmap, 1);
// (*m)->key = k;
// return &(*m)->val;
// }
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