84 lines
2.4 KiB
Rust
84 lines
2.4 KiB
Rust
// Copyright 2012 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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// A "shape" is a compact encoding of a type that is used by interpreted glue.
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// This substitutes for the runtime tags used by e.g. MLs.
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use back::abi;
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use lib::llvm::llvm;
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use lib::llvm::{True, False, ModuleRef, TypeRef, ValueRef};
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use middle::trans::base;
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use middle::trans::common::*;
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use middle::trans::machine::*;
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use middle::trans;
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use middle::ty::field;
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use middle::ty;
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use util::ppaux::ty_to_str;
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use core::dvec::DVec;
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use core::option::is_some;
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use core::vec;
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use std::map::HashMap;
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use syntax::ast;
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use syntax::ast_util::dummy_sp;
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use syntax::codemap::span;
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use syntax::util::interner;
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use ty_ctxt = middle::ty::ctxt;
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pub type ctxt = {mut next_tag_id: u16, pad: u16, pad2: u32};
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pub fn mk_global(ccx: @crate_ctxt,
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name: ~str,
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llval: ValueRef,
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internal: bool)
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-> ValueRef {
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unsafe {
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let llglobal = do str::as_c_str(name) |buf| {
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llvm::LLVMAddGlobal(ccx.llmod, val_ty(llval), buf)
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};
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llvm::LLVMSetInitializer(llglobal, llval);
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llvm::LLVMSetGlobalConstant(llglobal, True);
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if internal {
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::lib::llvm::SetLinkage(llglobal,
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::lib::llvm::InternalLinkage);
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}
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return llglobal;
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}
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}
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pub fn mk_ctxt(llmod: ModuleRef) -> ctxt {
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unsafe {
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let llshapetablesty = trans::common::T_named_struct(~"shapes");
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let _llshapetables = str::as_c_str(~"shapes", |buf| {
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llvm::LLVMAddGlobal(llmod, llshapetablesty, buf)
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});
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return {mut next_tag_id: 0u16, pad: 0u16, pad2: 0u32};
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}
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}
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/*
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Although these two functions are never called, they are here
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for a VERY GOOD REASON. See #3670
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*/
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pub fn add_u16(dest: &mut ~[u8], val: u16) {
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*dest += ~[(val & 0xffu16) as u8, (val >> 8u16) as u8];
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}
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pub fn add_substr(dest: &mut ~[u8], src: ~[u8]) {
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add_u16(&mut *dest, vec::len(src) as u16);
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*dest += src;
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}
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