1 // Copyright 2013 The Rust Project Developers. See the COPYRIGHT
2 // file at the top-level directory of this distribution and at
3 // http://rust-lang.org/COPYRIGHT.
5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
8 // option. This file may not be copied, modified, or distributed
9 // except according to those terms.
11 #![allow(non_upper_case_globals)]
14 use llvm::{TypeRef, Bool, False, True, TypeKind, ValueRef};
15 use llvm::{Float, Double, X86_FP80, PPC_FP128, FP128};
17 use trans::context::CrateContext;
18 use util::nodemap::FnvHashMap;
22 use std::ffi::CString;
25 use std::cell::RefCell;
29 #[derive(Clone, Copy, PartialEq, Debug)]
36 ($e:expr) => ( Type::from_ref(unsafe { $e }))
39 /// Wrapper for LLVM TypeRef
42 pub fn from_ref(r: TypeRef) -> Type {
48 #[inline(always)] // So it doesn't kill --opt-level=0 builds of the compiler
49 pub fn to_ref(&self) -> TypeRef {
53 pub fn void(ccx: &CrateContext) -> Type {
54 ty!(llvm::LLVMVoidTypeInContext(ccx.llcx()))
57 pub fn nil(ccx: &CrateContext) -> Type {
58 Type::empty_struct(ccx)
61 pub fn metadata(ccx: &CrateContext) -> Type {
62 ty!(llvm::LLVMMetadataTypeInContext(ccx.llcx()))
65 pub fn i1(ccx: &CrateContext) -> Type {
66 ty!(llvm::LLVMInt1TypeInContext(ccx.llcx()))
69 pub fn i8(ccx: &CrateContext) -> Type {
70 ty!(llvm::LLVMInt8TypeInContext(ccx.llcx()))
73 pub fn i16(ccx: &CrateContext) -> Type {
74 ty!(llvm::LLVMInt16TypeInContext(ccx.llcx()))
77 pub fn i32(ccx: &CrateContext) -> Type {
78 ty!(llvm::LLVMInt32TypeInContext(ccx.llcx()))
81 pub fn i64(ccx: &CrateContext) -> Type {
82 ty!(llvm::LLVMInt64TypeInContext(ccx.llcx()))
85 // Creates an integer type with the given number of bits, e.g. i24
86 pub fn ix(ccx: &CrateContext, num_bits: u64) -> Type {
87 ty!(llvm::LLVMIntTypeInContext(ccx.llcx(), num_bits as c_uint))
90 pub fn f32(ccx: &CrateContext) -> Type {
91 ty!(llvm::LLVMFloatTypeInContext(ccx.llcx()))
94 pub fn f64(ccx: &CrateContext) -> Type {
95 ty!(llvm::LLVMDoubleTypeInContext(ccx.llcx()))
98 pub fn bool(ccx: &CrateContext) -> Type {
102 pub fn char(ccx: &CrateContext) -> Type {
106 pub fn i8p(ccx: &CrateContext) -> Type {
107 Type::i8(ccx).ptr_to()
110 pub fn int(ccx: &CrateContext) -> Type {
111 match &ccx.tcx().sess.target.target.target_pointer_width[..] {
112 "32" => Type::i32(ccx),
113 "64" => Type::i64(ccx),
114 tws => panic!("Unsupported target word size for int: {}", tws),
118 pub fn int_from_ty(ccx: &CrateContext, t: ast::IntTy) -> Type {
120 ast::TyIs => ccx.int_type(),
121 ast::TyI8 => Type::i8(ccx),
122 ast::TyI16 => Type::i16(ccx),
123 ast::TyI32 => Type::i32(ccx),
124 ast::TyI64 => Type::i64(ccx)
128 pub fn uint_from_ty(ccx: &CrateContext, t: ast::UintTy) -> Type {
130 ast::TyUs => ccx.int_type(),
131 ast::TyU8 => Type::i8(ccx),
132 ast::TyU16 => Type::i16(ccx),
133 ast::TyU32 => Type::i32(ccx),
134 ast::TyU64 => Type::i64(ccx)
138 pub fn float_from_ty(ccx: &CrateContext, t: ast::FloatTy) -> Type {
140 ast::TyF32 => Type::f32(ccx),
141 ast::TyF64 => Type::f64(ccx),
145 pub fn func(args: &[Type], ret: &Type) -> Type {
146 let vec : &[TypeRef] = unsafe { mem::transmute(args) };
147 ty!(llvm::LLVMFunctionType(ret.to_ref(), vec.as_ptr(),
148 args.len() as c_uint, False))
151 pub fn variadic_func(args: &[Type], ret: &Type) -> Type {
152 let vec : &[TypeRef] = unsafe { mem::transmute(args) };
153 ty!(llvm::LLVMFunctionType(ret.to_ref(), vec.as_ptr(),
154 args.len() as c_uint, True))
157 pub fn struct_(ccx: &CrateContext, els: &[Type], packed: bool) -> Type {
158 let els : &[TypeRef] = unsafe { mem::transmute(els) };
159 ty!(llvm::LLVMStructTypeInContext(ccx.llcx(), els.as_ptr(),
164 pub fn named_struct(ccx: &CrateContext, name: &str) -> Type {
165 let name = CString::new(name).unwrap();
166 ty!(llvm::LLVMStructCreateNamed(ccx.llcx(), name.as_ptr()))
169 pub fn empty_struct(ccx: &CrateContext) -> Type {
170 Type::struct_(ccx, &[], false)
173 pub fn glue_fn(ccx: &CrateContext, t: Type) -> Type {
174 Type::func(&[t], &Type::void(ccx))
177 pub fn array(ty: &Type, len: u64) -> Type {
178 ty!(llvm::LLVMRustArrayType(ty.to_ref(), len))
181 pub fn vector(ty: &Type, len: u64) -> Type {
182 ty!(llvm::LLVMVectorType(ty.to_ref(), len as c_uint))
185 pub fn vec(ccx: &CrateContext, ty: &Type) -> Type {
187 &[Type::array(ty, 0), Type::int(ccx)],
191 pub fn opaque_vec(ccx: &CrateContext) -> Type {
192 Type::vec(ccx, &Type::i8(ccx))
195 pub fn vtable_ptr(ccx: &CrateContext) -> Type {
196 Type::glue_fn(ccx, Type::i8p(ccx)).ptr_to().ptr_to()
199 pub fn kind(&self) -> TypeKind {
201 llvm::LLVMGetTypeKind(self.to_ref())
205 pub fn set_struct_body(&mut self, els: &[Type], packed: bool) {
207 let vec : &[TypeRef] = mem::transmute(els);
208 llvm::LLVMStructSetBody(self.to_ref(), vec.as_ptr(),
209 els.len() as c_uint, packed as Bool)
213 pub fn ptr_to(&self) -> Type {
214 ty!(llvm::LLVMPointerType(self.to_ref(), 0))
217 pub fn is_aggregate(&self) -> bool {
219 TypeKind::Struct | TypeKind::Array => true,
224 pub fn is_packed(&self) -> bool {
226 llvm::LLVMIsPackedStruct(self.to_ref()) == True
230 pub fn element_type(&self) -> Type {
232 Type::from_ref(llvm::LLVMGetElementType(self.to_ref()))
236 /// Return the number of elements in `self` if it is a LLVM vector type.
237 pub fn vector_length(&self) -> usize {
239 llvm::LLVMGetVectorSize(self.to_ref()) as usize
243 pub fn array_length(&self) -> usize {
245 llvm::LLVMGetArrayLength(self.to_ref()) as usize
249 pub fn field_types(&self) -> Vec<Type> {
251 let n_elts = llvm::LLVMCountStructElementTypes(self.to_ref()) as usize;
255 let mut elts = vec![Type { rf: ptr::null_mut() }; n_elts];
256 llvm::LLVMGetStructElementTypes(self.to_ref(),
257 elts.as_mut_ptr() as *mut TypeRef);
262 pub fn return_type(&self) -> Type {
263 ty!(llvm::LLVMGetReturnType(self.to_ref()))
266 pub fn func_params(&self) -> Vec<Type> {
268 let n_args = llvm::LLVMCountParamTypes(self.to_ref()) as usize;
269 let mut args = vec![Type { rf: ptr::null_mut() }; n_args];
270 llvm::LLVMGetParamTypes(self.to_ref(),
271 args.as_mut_ptr() as *mut TypeRef);
276 pub fn float_width(&self) -> usize {
281 FP128 | PPC_FP128 => 128,
282 _ => panic!("llvm_float_width called on a non-float type")
286 /// Retrieve the bit width of the integer type `self`.
287 pub fn int_width(&self) -> u64 {
289 llvm::LLVMGetIntTypeWidth(self.to_ref()) as u64
295 /* Memory-managed object interface to type handles. */
297 pub struct TypeNames {
298 named_types: RefCell<FnvHashMap<String, TypeRef>>,
302 pub fn new() -> TypeNames {
304 named_types: RefCell::new(FnvHashMap())
308 pub fn associate_type(&self, s: &str, t: &Type) {
309 assert!(self.named_types.borrow_mut().insert(s.to_string(),
310 t.to_ref()).is_none());
313 pub fn find_type(&self, s: &str) -> Option<Type> {
314 self.named_types.borrow().get(s).map(|x| Type::from_ref(*x))
317 pub fn type_to_string(&self, ty: Type) -> String {
318 llvm::build_string(|s| unsafe {
319 llvm::LLVMWriteTypeToString(ty.to_ref(), s);
320 }).expect("non-UTF8 type description from LLVM")
323 pub fn types_to_str(&self, tys: &[Type]) -> String {
324 let strs: Vec<String> = tys.iter().map(|t| self.type_to_string(*t)).collect();
325 format!("[{}]", strs.join(","))
328 pub fn val_to_string(&self, val: ValueRef) -> String {
329 llvm::build_string(|s| unsafe {
330 llvm::LLVMWriteValueToString(val, s);
331 }).expect("nun-UTF8 value description from LLVM")