60 lines
1.6 KiB
Rust
60 lines
1.6 KiB
Rust
// A "shape" is a compact encoding of a type that is used by interpreted glue.
|
|
// This substitutes for the runtime tags used by e.g. MLs.
|
|
|
|
use lib::llvm::llvm;
|
|
use lib::llvm::{True, False, ModuleRef, TypeRef, ValueRef};
|
|
use driver::session;
|
|
use driver::session::session;
|
|
use trans::base;
|
|
use middle::trans::common::*;
|
|
use middle::trans::machine::*;
|
|
use back::abi;
|
|
use middle::ty;
|
|
use middle::ty::field;
|
|
use syntax::ast;
|
|
use syntax::ast_util::dummy_sp;
|
|
use syntax::util::interner;
|
|
use util::ppaux::ty_to_str;
|
|
use syntax::codemap::span;
|
|
use dvec::DVec;
|
|
|
|
use std::map::HashMap;
|
|
use option::is_some;
|
|
|
|
use ty_ctxt = middle::ty::ctxt;
|
|
|
|
type ctxt = {mut next_tag_id: u16, pad: u16, pad2: u32};
|
|
|
|
fn mk_global(ccx: @crate_ctxt, name: ~str, llval: ValueRef, internal: bool) ->
|
|
ValueRef {
|
|
let llglobal = do str::as_c_str(name) |buf| {
|
|
lib::llvm::llvm::LLVMAddGlobal(ccx.llmod, val_ty(llval), buf)
|
|
};
|
|
lib::llvm::llvm::LLVMSetInitializer(llglobal, llval);
|
|
lib::llvm::llvm::LLVMSetGlobalConstant(llglobal, True);
|
|
|
|
if internal {
|
|
lib::llvm::SetLinkage(llglobal, lib::llvm::InternalLinkage);
|
|
}
|
|
|
|
return llglobal;
|
|
}
|
|
|
|
fn mk_ctxt(llmod: ModuleRef) -> ctxt {
|
|
let llshapetablesty = trans::common::T_named_struct(~"shapes");
|
|
let _llshapetables = str::as_c_str(~"shapes", |buf| {
|
|
lib::llvm::llvm::LLVMAddGlobal(llmod, llshapetablesty, buf)
|
|
});
|
|
|
|
return {mut next_tag_id: 0u16, pad: 0u16, pad2: 0u32};
|
|
}
|
|
|
|
fn add_u16(&dest: ~[u8], val: u16) {
|
|
dest += ~[(val & 0xffu16) as u8, (val >> 8u16) as u8];
|
|
}
|
|
|
|
fn add_substr(&dest: ~[u8], src: ~[u8]) {
|
|
add_u16(dest, vec::len(src) as u16);
|
|
dest += src;
|
|
}
|
|
|