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::{ContextRef, TypeRef, Bool, False, True, TypeKind};
15 use llvm::{Float, Double, X86_FP80, PPC_FP128, FP128};
17 use context::CrateContext;
20 use rustc::ty::layout;
22 use std::ffi::CString;
29 #[derive(Clone, Copy, PartialEq)]
35 impl fmt::Debug for Type {
36 fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
37 f.write_str(&llvm::build_string(|s| unsafe {
38 llvm::LLVMRustWriteTypeToString(self.to_ref(), s);
39 }).expect("non-UTF8 type description from LLVM"))
44 ($e:expr) => ( Type::from_ref(unsafe { $e }))
47 /// Wrapper for LLVM TypeRef
50 pub fn from_ref(r: TypeRef) -> Type {
56 #[inline(always)] // So it doesn't kill --opt-level=0 builds of the compiler
57 pub fn to_ref(&self) -> TypeRef {
61 pub fn to_ref_slice(slice: &[Type]) -> &[TypeRef] {
62 unsafe { mem::transmute(slice) }
65 pub fn void(ccx: &CrateContext) -> Type {
66 ty!(llvm::LLVMVoidTypeInContext(ccx.llcx()))
69 pub fn nil(ccx: &CrateContext) -> Type {
70 Type::empty_struct(ccx)
73 pub fn metadata(ccx: &CrateContext) -> Type {
74 ty!(llvm::LLVMRustMetadataTypeInContext(ccx.llcx()))
77 pub fn i1(ccx: &CrateContext) -> Type {
78 ty!(llvm::LLVMInt1TypeInContext(ccx.llcx()))
81 pub fn i8(ccx: &CrateContext) -> Type {
82 ty!(llvm::LLVMInt8TypeInContext(ccx.llcx()))
85 pub fn i8_llcx(llcx: ContextRef) -> Type {
86 ty!(llvm::LLVMInt8TypeInContext(llcx))
89 pub fn i16(ccx: &CrateContext) -> Type {
90 ty!(llvm::LLVMInt16TypeInContext(ccx.llcx()))
93 pub fn i32(ccx: &CrateContext) -> Type {
94 ty!(llvm::LLVMInt32TypeInContext(ccx.llcx()))
97 pub fn i64(ccx: &CrateContext) -> Type {
98 ty!(llvm::LLVMInt64TypeInContext(ccx.llcx()))
101 pub fn i128(ccx: &CrateContext) -> Type {
102 ty!(llvm::LLVMIntTypeInContext(ccx.llcx(), 128))
105 // Creates an integer type with the given number of bits, e.g. i24
106 pub fn ix(ccx: &CrateContext, num_bits: u64) -> Type {
107 ty!(llvm::LLVMIntTypeInContext(ccx.llcx(), num_bits as c_uint))
110 pub fn f32(ccx: &CrateContext) -> Type {
111 ty!(llvm::LLVMFloatTypeInContext(ccx.llcx()))
114 pub fn f64(ccx: &CrateContext) -> Type {
115 ty!(llvm::LLVMDoubleTypeInContext(ccx.llcx()))
118 pub fn bool(ccx: &CrateContext) -> Type {
122 pub fn char(ccx: &CrateContext) -> Type {
126 pub fn i8p(ccx: &CrateContext) -> Type {
127 Type::i8(ccx).ptr_to()
130 pub fn i8p_llcx(llcx: ContextRef) -> Type {
131 Type::i8_llcx(llcx).ptr_to()
134 pub fn int(ccx: &CrateContext) -> Type {
135 match &ccx.tcx().sess.target.target.target_pointer_width[..] {
136 "16" => Type::i16(ccx),
137 "32" => Type::i32(ccx),
138 "64" => Type::i64(ccx),
139 tws => bug!("Unsupported target word size for int: {}", tws),
143 pub fn int_from_ty(ccx: &CrateContext, t: ast::IntTy) -> Type {
145 ast::IntTy::Is => ccx.int_type(),
146 ast::IntTy::I8 => Type::i8(ccx),
147 ast::IntTy::I16 => Type::i16(ccx),
148 ast::IntTy::I32 => Type::i32(ccx),
149 ast::IntTy::I64 => Type::i64(ccx),
150 ast::IntTy::I128 => Type::i128(ccx),
154 pub fn uint_from_ty(ccx: &CrateContext, t: ast::UintTy) -> Type {
156 ast::UintTy::Us => ccx.int_type(),
157 ast::UintTy::U8 => Type::i8(ccx),
158 ast::UintTy::U16 => Type::i16(ccx),
159 ast::UintTy::U32 => Type::i32(ccx),
160 ast::UintTy::U64 => Type::i64(ccx),
161 ast::UintTy::U128 => Type::i128(ccx),
165 pub fn float_from_ty(ccx: &CrateContext, t: ast::FloatTy) -> Type {
167 ast::FloatTy::F32 => Type::f32(ccx),
168 ast::FloatTy::F64 => Type::f64(ccx),
172 pub fn func(args: &[Type], ret: &Type) -> Type {
173 let slice: &[TypeRef] = Type::to_ref_slice(args);
174 ty!(llvm::LLVMFunctionType(ret.to_ref(), slice.as_ptr(),
175 args.len() as c_uint, False))
178 pub fn variadic_func(args: &[Type], ret: &Type) -> Type {
179 let slice: &[TypeRef] = Type::to_ref_slice(args);
180 ty!(llvm::LLVMFunctionType(ret.to_ref(), slice.as_ptr(),
181 args.len() as c_uint, True))
184 pub fn struct_(ccx: &CrateContext, els: &[Type], packed: bool) -> Type {
185 let els: &[TypeRef] = Type::to_ref_slice(els);
186 ty!(llvm::LLVMStructTypeInContext(ccx.llcx(), els.as_ptr(),
191 pub fn named_struct(ccx: &CrateContext, name: &str) -> Type {
192 let name = CString::new(name).unwrap();
193 ty!(llvm::LLVMStructCreateNamed(ccx.llcx(), name.as_ptr()))
196 pub fn empty_struct(ccx: &CrateContext) -> Type {
197 Type::struct_(ccx, &[], false)
200 pub fn array(ty: &Type, len: u64) -> Type {
201 ty!(llvm::LLVMRustArrayType(ty.to_ref(), len))
204 pub fn vector(ty: &Type, len: u64) -> Type {
205 ty!(llvm::LLVMVectorType(ty.to_ref(), len as c_uint))
208 pub fn vec(ccx: &CrateContext, ty: &Type) -> Type {
210 &[Type::array(ty, 0), Type::int(ccx)],
214 pub fn opaque_vec(ccx: &CrateContext) -> Type {
215 Type::vec(ccx, &Type::i8(ccx))
218 pub fn vtable_ptr(ccx: &CrateContext) -> Type {
219 Type::func(&[Type::i8p(ccx)], &Type::void(ccx)).ptr_to().ptr_to()
222 pub fn kind(&self) -> TypeKind {
224 llvm::LLVMRustGetTypeKind(self.to_ref())
228 pub fn set_struct_body(&mut self, els: &[Type], packed: bool) {
229 let slice: &[TypeRef] = Type::to_ref_slice(els);
231 llvm::LLVMStructSetBody(self.to_ref(), slice.as_ptr(),
232 els.len() as c_uint, packed as Bool)
236 pub fn ptr_to(&self) -> Type {
237 ty!(llvm::LLVMPointerType(self.to_ref(), 0))
240 pub fn is_aggregate(&self) -> bool {
242 TypeKind::Struct | TypeKind::Array => true,
247 pub fn is_packed(&self) -> bool {
249 llvm::LLVMIsPackedStruct(self.to_ref()) == True
253 pub fn element_type(&self) -> Type {
255 Type::from_ref(llvm::LLVMGetElementType(self.to_ref()))
259 /// Return the number of elements in `self` if it is a LLVM vector type.
260 pub fn vector_length(&self) -> usize {
262 llvm::LLVMGetVectorSize(self.to_ref()) as usize
266 pub fn array_length(&self) -> usize {
268 llvm::LLVMGetArrayLength(self.to_ref()) as usize
272 pub fn field_types(&self) -> Vec<Type> {
274 let n_elts = llvm::LLVMCountStructElementTypes(self.to_ref()) as usize;
278 let mut elts = vec![Type { rf: ptr::null_mut() }; n_elts];
279 llvm::LLVMGetStructElementTypes(self.to_ref(),
280 elts.as_mut_ptr() as *mut TypeRef);
285 pub fn return_type(&self) -> Type {
286 ty!(llvm::LLVMGetReturnType(self.to_ref()))
289 pub fn func_params(&self) -> Vec<Type> {
291 let n_args = llvm::LLVMCountParamTypes(self.to_ref()) as usize;
292 let mut args = vec![Type { rf: ptr::null_mut() }; n_args];
293 llvm::LLVMGetParamTypes(self.to_ref(),
294 args.as_mut_ptr() as *mut TypeRef);
299 pub fn float_width(&self) -> usize {
304 FP128 | PPC_FP128 => 128,
305 _ => bug!("llvm_float_width called on a non-float type")
309 /// Retrieve the bit width of the integer type `self`.
310 pub fn int_width(&self) -> u64 {
312 llvm::LLVMGetIntTypeWidth(self.to_ref()) as u64
316 pub fn from_integer(cx: &CrateContext, i: layout::Integer) -> Type {
317 use rustc::ty::layout::Integer::*;
321 I16 => Type::i16(cx),
322 I32 => Type::i32(cx),
323 I64 => Type::i64(cx),
324 I128 => Type::i128(cx),
328 pub fn from_primitive(ccx: &CrateContext, p: layout::Primitive) -> Type {
330 layout::Int(i) => Type::from_integer(ccx, i),
331 layout::F32 => Type::f32(ccx),
332 layout::F64 => Type::f64(ccx),
333 layout::Pointer => bug!("It is not possible to convert Pointer directly to Type.")