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)]
16 use llvm::{Bool, False, True};
17 use context::CodegenCx;
23 use rustc::ty::layout::{self, Align, Size, HasTyCtxt};
24 use rustc::util::nodemap::FxHashMap;
25 use rustc::ty::{self, Ty};
26 use rustc::ty::layout::TyLayout;
27 use rustc_target::abi::call::{CastTarget, FnType, Reg};
28 use rustc_data_structures::small_c_str::SmallCStr;
30 use rustc_codegen_ssa;
31 use rustc_codegen_ssa::common::TypeKind;
32 use type_of::LayoutLlvmExt;
33 use abi::{LlvmType, FnTypeExt};
36 use std::cell::RefCell;
40 impl PartialEq for Type {
41 fn eq(&self, other: &Self) -> bool {
42 self as *const _ == other as *const _
46 impl fmt::Debug for Type {
47 fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
48 f.write_str(&llvm::build_string(|s| unsafe {
49 llvm::LLVMRustWriteTypeToString(self, s);
50 }).expect("non-UTF8 type description from LLVM"))
54 impl BaseTypeMethods<'tcx> for CodegenCx<'ll, 'tcx> {
55 fn type_void(&self) -> &'ll Type {
57 llvm::LLVMVoidTypeInContext(self.llcx)
61 fn type_metadata(&self) -> &'ll Type {
63 llvm::LLVMRustMetadataTypeInContext(self.llcx)
67 fn type_i1(&self) -> &'ll Type {
69 llvm::LLVMInt1TypeInContext(self.llcx)
73 fn type_i8(&self) -> &'ll Type {
75 llvm::LLVMInt8TypeInContext(self.llcx)
80 fn type_i16(&self) -> &'ll Type {
83 llvm::LLVMInt16TypeInContext(self.llcx)
87 fn type_i32(&self) -> &'ll Type {
89 llvm::LLVMInt32TypeInContext(self.llcx)
93 fn type_i64(&self) -> &'ll Type {
95 llvm::LLVMInt64TypeInContext(self.llcx)
99 fn type_i128(&self) -> &'ll Type {
101 llvm::LLVMIntTypeInContext(self.llcx, 128)
105 fn type_ix(&self, num_bits: u64) -> &'ll Type {
107 llvm::LLVMIntTypeInContext(self.llcx, num_bits as c_uint)
111 fn type_f32(&self) -> &'ll Type {
113 llvm::LLVMFloatTypeInContext(self.llcx)
117 fn type_f64(&self) -> &'ll Type {
119 llvm::LLVMDoubleTypeInContext(self.llcx)
123 fn type_x86_mmx(&self) -> &'ll Type {
125 llvm::LLVMX86MMXTypeInContext(self.llcx)
135 llvm::LLVMFunctionType(ret, args.as_ptr(),
136 args.len() as c_uint, False)
140 fn type_variadic_func(
146 llvm::LLVMFunctionType(ret, args.as_ptr(),
147 args.len() as c_uint, True)
157 llvm::LLVMStructTypeInContext(self.llcx, els.as_ptr(),
163 fn type_named_struct(&self, name: &str) -> &'ll Type {
164 let name = SmallCStr::new(name);
166 llvm::LLVMStructCreateNamed(self.llcx, name.as_ptr())
171 fn type_array(&self, ty: &'ll Type, len: u64) -> &'ll Type {
173 llvm::LLVMRustArrayType(ty, len)
177 fn type_vector(&self, ty: &'ll Type, len: u64) -> &'ll Type {
179 llvm::LLVMVectorType(ty, len as c_uint)
183 fn type_kind(&self, ty: &'ll Type) -> TypeKind {
185 llvm::LLVMRustGetTypeKind(ty).to_generic()
189 fn set_struct_body(&self, ty: &'ll Type, els: &[&'ll Type], packed: bool) {
191 llvm::LLVMStructSetBody(ty, els.as_ptr(),
192 els.len() as c_uint, packed as Bool)
196 fn type_ptr_to(&self, ty: &'ll Type) -> &'ll Type {
197 assert_ne!(self.type_kind(ty), TypeKind::Function,
198 "don't call ptr_to on function types, use ptr_to_llvm_type on FnType instead");
202 fn element_type(&self, ty: &'ll Type) -> &'ll Type {
204 llvm::LLVMGetElementType(ty)
208 fn vector_length(&self, ty: &'ll Type) -> usize {
210 llvm::LLVMGetVectorSize(ty) as usize
214 fn func_params_types(&self, ty: &'ll Type) -> Vec<&'ll Type> {
216 let n_args = llvm::LLVMCountParamTypes(ty) as usize;
217 let mut args = Vec::with_capacity(n_args);
218 llvm::LLVMGetParamTypes(ty, args.as_mut_ptr());
219 args.set_len(n_args);
224 fn float_width(&self, ty: &'ll Type) -> usize {
225 match self.type_kind(ty) {
226 TypeKind::Float => 32,
227 TypeKind::Double => 64,
228 TypeKind::X86_FP80 => 80,
229 TypeKind::FP128 | TypeKind::PPC_FP128 => 128,
230 _ => bug!("llvm_float_width called on a non-float type")
234 fn int_width(&self, ty: &'ll Type) -> u64 {
236 llvm::LLVMGetIntTypeWidth(ty) as u64
240 fn val_ty(&self, v: &'ll Value) -> &'ll Type {
244 fn scalar_lltypes(&self) -> &RefCell<FxHashMap<Ty<'tcx>, Self::Type>> {
250 pub fn i8_llcx(llcx: &llvm::Context) -> &Type {
252 llvm::LLVMInt8TypeInContext(llcx)
256 // Creates an integer type with the given number of bits, e.g. i24
258 llcx: &llvm::Context,
262 llvm::LLVMIntTypeInContext(llcx, num_bits as c_uint)
266 pub fn i8p_llcx(llcx: &'ll llvm::Context) -> &'ll Type {
267 Type::i8_llcx(llcx).ptr_to()
270 fn ptr_to(&self) -> &Type {
272 llvm::LLVMPointerType(&self, 0)
277 impl DerivedTypeMethods<'tcx> for CodegenCx<'ll, 'tcx> {
278 fn type_bool(&self) -> &'ll Type {
282 fn type_i8p(&self) -> &'ll Type {
283 self.type_ptr_to(self.type_i8())
286 fn type_isize(&self) -> &'ll Type {
290 fn type_int(&self) -> &'ll Type {
291 match &self.sess().target.target.target_c_int_width[..] {
292 "16" => self.type_i16(),
293 "32" => self.type_i32(),
294 "64" => self.type_i64(),
295 width => bug!("Unsupported target_c_int_width: {}", width),
304 ast::IntTy::Isize => self.isize_ty,
305 ast::IntTy::I8 => self.type_i8(),
306 ast::IntTy::I16 => self.type_i16(),
307 ast::IntTy::I32 => self.type_i32(),
308 ast::IntTy::I64 => self.type_i64(),
309 ast::IntTy::I128 => self.type_i128(),
313 fn type_uint_from_ty(
318 ast::UintTy::Usize => self.isize_ty,
319 ast::UintTy::U8 => self.type_i8(),
320 ast::UintTy::U16 => self.type_i16(),
321 ast::UintTy::U32 => self.type_i32(),
322 ast::UintTy::U64 => self.type_i64(),
323 ast::UintTy::U128 => self.type_i128(),
327 fn type_float_from_ty(
332 ast::FloatTy::F32 => self.type_f32(),
333 ast::FloatTy::F64 => self.type_f64(),
337 fn type_from_integer(&self, i: layout::Integer) -> &'ll Type {
338 use rustc::ty::layout::Integer::*;
340 I8 => self.type_i8(),
341 I16 => self.type_i16(),
342 I32 => self.type_i32(),
343 I64 => self.type_i64(),
344 I128 => self.type_i128(),
348 fn type_pointee_for_abi_align(&self, align: Align) -> &'ll Type {
349 // FIXME(eddyb) We could find a better approximation if ity.align < align.
350 let ity = layout::Integer::approximate_abi_align(self, align);
351 self.type_from_integer(ity)
354 fn type_padding_filler(
359 let unit = layout::Integer::approximate_abi_align(self, align);
360 let size = size.bytes();
361 let unit_size = unit.size().bytes();
362 assert_eq!(size % unit_size, 0);
363 self.type_array(self.type_from_integer(unit), size / unit_size)
366 fn type_needs_drop(&self, ty: Ty<'tcx>) -> bool {
367 rustc_codegen_ssa::common::type_needs_drop(self.tcx(), ty)
370 fn type_is_sized(&self, ty: Ty<'tcx>) -> bool {
371 rustc_codegen_ssa::common::type_is_sized(self.tcx(), ty)
374 fn type_is_freeze(&self, ty: Ty<'tcx>) -> bool {
375 rustc_codegen_ssa::common::type_is_freeze(self.tcx(), ty)
378 fn type_has_metadata(&self, ty: Ty<'tcx>) -> bool {
379 use syntax_pos::DUMMY_SP;
380 if ty.is_sized(self.tcx().at(DUMMY_SP), ty::ParamEnv::reveal_all()) {
384 let tail = self.tcx().struct_tail(ty);
386 ty::Foreign(..) => false,
387 ty::Str | ty::Slice(..) | ty::Dynamic(..) => true,
388 _ => bug!("unexpected unsized tail: {:?}", tail.sty),
393 impl LayoutTypeMethods<'tcx> for CodegenCx<'ll, 'tcx> {
394 fn backend_type(&self, layout: TyLayout<'tcx>) -> &'ll Type {
395 layout.llvm_type(self)
397 fn immediate_backend_type(&self, layout: TyLayout<'tcx>) -> &'ll Type {
398 layout.immediate_llvm_type(self)
400 fn is_backend_immediate(&self, layout: TyLayout<'tcx>) -> bool {
401 layout.is_llvm_immediate()
403 fn scalar_pair_element_backend_type<'a>(
405 layout: TyLayout<'tcx>,
409 layout.scalar_pair_element_llvm_type(self, index, immediate)
411 fn cast_backend_type(&self, ty: &CastTarget) -> &'ll Type {
414 fn fn_backend_type(&self, ty: &FnType<'tcx, Ty<'tcx>>) -> &'ll Type {
417 fn fn_ptr_backend_type(&self, ty: &FnType<'tcx, Ty<'tcx>>) -> &'ll Type {
418 ty.ptr_to_llvm_type(self)
420 fn reg_backend_type(&self, ty: &Reg) -> &'ll Type {