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import std._str;
import std._vec;
import std._str.rustrt.sbuf;
import std._vec.rustrt.vbuf;
import std.map.hashmap;
import front.ast;
import driver.session;
import back.x86;
import back.abi;
import util.common.istr;
import util.common.new_str_hash;
import lib.llvm.llvm;
import lib.llvm.builder;
import lib.llvm.llvm.ModuleRef;
import lib.llvm.llvm.ValueRef;
import lib.llvm.llvm.TypeRef;
import lib.llvm.llvm.BuilderRef;
import lib.llvm.llvm.BasicBlockRef;
import lib.llvm.False;
import lib.llvm.True;
type glue_fns = rec(ValueRef activate_glue,
ValueRef yield_glue,
vec[ValueRef] upcall_glues);
type trans_ctxt = rec(session.session sess,
ModuleRef llmod,
hashmap[str,ValueRef] upcalls,
@glue_fns glues,
str path);
fn T_nil() -> TypeRef {
ret llvm.LLVMVoidType();
}
fn T_int() -> TypeRef {
ret llvm.LLVMInt32Type();
}
fn T_fn(vec[TypeRef] inputs, TypeRef output) -> TypeRef {
ret llvm.LLVMFunctionType(output,
_vec.buf[TypeRef](inputs),
_vec.len[TypeRef](inputs),
False);
}
fn T_ptr(TypeRef t) -> TypeRef {
ret llvm.LLVMPointerType(t, 0u);
}
fn T_struct(vec[TypeRef] elts) -> TypeRef {
ret llvm.LLVMStructType(_vec.buf[TypeRef](elts),
_vec.len[TypeRef](elts),
False);
}
fn T_opaque() -> TypeRef {
ret llvm.LLVMOpaqueType();
}
fn T_task() -> TypeRef {
ret T_struct(vec(T_int(), // Refcount
T_opaque())); // Rest is opaque for now
}
fn decl_cdecl_fn(ModuleRef llmod, str name,
vec[TypeRef] inputs, TypeRef output) -> ValueRef {
let TypeRef llty = T_fn(inputs, output);
let ValueRef llfn =
llvm.LLVMAddFunction(llmod, _str.buf(name), llty);
llvm.LLVMSetFunctionCallConv(llfn, lib.llvm.LLVMCCallConv);
ret llfn;
}
fn decl_glue(ModuleRef llmod, str s) -> ValueRef {
ret decl_cdecl_fn(llmod, s, vec(T_ptr(T_task())), T_nil());
}
fn decl_upcall(ModuleRef llmod, uint _n) -> ValueRef {
let int n = _n as int;
let str s = "rust_upcall_" + istr(n);
let vec[TypeRef] args =
vec(T_ptr(T_task()), // taskptr
T_int()) // callee
+ _vec.init_elt[TypeRef](T_int(), n as uint);
ret decl_cdecl_fn(llmod, s, args, T_int());
}
type terminator = fn(&trans_ctxt cx, builder b);
fn get_upcall(&trans_ctxt cx, str name, int n_args) -> ValueRef {
if (cx.upcalls.contains_key(name)) {
ret cx.upcalls.get(name);
}
auto inputs = vec(T_ptr(T_task()));
inputs += _vec.init_elt[TypeRef](T_int(), n_args as uint);
auto output = T_nil();
auto f = decl_cdecl_fn(cx.llmod, name, inputs, output);
cx.upcalls.insert(name, f);
ret f;
}
fn trans_log(&trans_ctxt cx, builder b, &ast.atom a) {
alt (a) {
case (ast.atom_lit(?lit)) {
alt (*lit) {
case (ast.lit_int(?i)) {
cx.sess.unimpl("log int");
}
case (_) {
cx.sess.unimpl("literal variant in trans_log");
}
}
}
case (_) {
cx.sess.unimpl("atom variant in trans_log");
}
}
}
fn trans_stmt(&trans_ctxt cx, builder b, &ast.stmt s, terminator t) {
alt (s) {
case (ast.stmt_log(?a)) {
trans_log(cx, b, *a);
}
case (_) {
cx.sess.unimpl("stmt variant");
}
}
}
fn default_terminate(&trans_ctxt cx, builder b) {
b.RetVoid();
}
fn trans_block(&trans_ctxt cx, ValueRef llfn, &ast.block b, terminator t) {
let BasicBlockRef llbb =
llvm.LLVMAppendBasicBlock(llfn, _str.buf(""));
let BuilderRef llbuild = llvm.LLVMCreateBuilder();
llvm.LLVMPositionBuilderAtEnd(llbuild, llbb);
auto bld = builder(llbuild);
for (@ast.stmt s in b) {
trans_stmt(cx, bld, *s, t);
}
t(cx, bld);
}
fn trans_fn(&trans_ctxt cx, &ast._fn f) {
let vec[TypeRef] args = vec();
let ValueRef llfn = decl_cdecl_fn(cx.llmod, cx.path, args, T_nil());
auto term = default_terminate;
trans_block(cx, llfn, f.body, term);
}
fn trans_item(&trans_ctxt cx, &str name, &ast.item item) {
auto sub_cx = rec(path=cx.path + "." + name with cx);
alt (item) {
case (ast.item_fn(?f)) {
trans_fn(sub_cx, *f);
}
case (ast.item_mod(?m)) {
trans_mod(sub_cx, *m);
}
}
}
fn trans_mod(&trans_ctxt cx, &ast._mod m) {
for each (tup(str, ast.item) pair in m.items()) {
trans_item(cx, pair._0, pair._1);
}
}
fn trans_crate(session.session sess, ast.crate crate) {
auto llmod =
llvm.LLVMModuleCreateWithNameInContext(_str.buf("rust_out"),
llvm.LLVMGetGlobalContext());
llvm.LLVMSetModuleInlineAsm(llmod, _str.buf(x86.get_module_asm()));
auto glues = @rec(activate_glue = decl_glue(llmod, "rust_activate_glue"),
yield_glue = decl_glue(llmod, "rust_yield_glue"),
upcall_glues =
_vec.init_fn[ValueRef](bind decl_upcall(llmod, _),
abi.n_upcall_glues as uint));
auto cx = rec(sess = sess,
llmod = llmod,
upcalls = new_str_hash[ValueRef](),
glues = glues,
path = "");
trans_mod(cx, crate.module);
llvm.LLVMWriteBitcodeToFile(llmod, _str.buf("rust_out.bc"));
llvm.LLVMDisposeModule(llmod);
}
//
// Local Variables:
// mode: rust
// fill-column: 78;
// indent-tabs-mode: nil
// c-basic-offset: 4
// buffer-file-coding-system: utf-8-unix
// compile-command: "make -k -C ../.. 2>&1 | sed -e 's/\\/x\\//x:\\//g'";
// End:
//
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