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.
12 use llvm::{ContextRef, ModuleRef, ValueRef, BuilderRef};
13 use llvm::{TargetData};
14 use llvm::mk_target_data;
15 use metadata::common::LinkMeta;
16 use middle::def::ExportMap;
20 use trans::builder::Builder;
21 use trans::common::{ExternMap,tydesc_info,BuilderRef_res};
23 use trans::monomorphize::MonoId;
24 use trans::type_::{Type, TypeNames};
25 use middle::ty::{self, Ty};
26 use session::config::NoDebugInfo;
28 use util::ppaux::Repr;
29 use util::sha2::Sha256;
30 use util::nodemap::{NodeMap, NodeSet, DefIdMap, FnvHashMap, FnvHashSet};
32 use std::ffi::CString;
33 use std::cell::{Cell, RefCell};
37 use syntax::parse::token::InternedString;
40 pub n_static_tydescs: Cell<uint>,
41 pub n_glues_created: Cell<uint>,
42 pub n_null_glues: Cell<uint>,
43 pub n_real_glues: Cell<uint>,
44 pub n_fns: Cell<uint>,
45 pub n_monos: Cell<uint>,
46 pub n_inlines: Cell<uint>,
47 pub n_closures: Cell<uint>,
48 pub n_llvm_insns: Cell<uint>,
49 pub llvm_insns: RefCell<FnvHashMap<String, uint>>,
50 // (ident, llvm-instructions)
51 pub fn_stats: RefCell<Vec<(String, uint)> >,
54 /// The shared portion of a `CrateContext`. There is one `SharedCrateContext`
55 /// per crate. The data here is shared between all compilation units of the
56 /// crate, so it must not contain references to any LLVM data structures
57 /// (aside from metadata-related ones).
58 pub struct SharedCrateContext<'tcx> {
59 local_ccxs: Vec<LocalCrateContext<'tcx>>,
61 metadata_llmod: ModuleRef,
62 metadata_llcx: ContextRef,
64 export_map: ExportMap,
66 item_symbols: RefCell<NodeMap<String>>,
68 symbol_hasher: RefCell<Sha256>,
72 available_monomorphizations: RefCell<FnvHashSet<String>>,
73 available_drop_glues: RefCell<FnvHashMap<Ty<'tcx>, String>>,
76 /// The local portion of a `CrateContext`. There is one `LocalCrateContext`
77 /// per compilation unit. Each one has its own LLVM `ContextRef` so that
78 /// several compilation units may be optimized in parallel. All other LLVM
79 /// data structures in the `LocalCrateContext` are tied to that `ContextRef`.
80 pub struct LocalCrateContext<'tcx> {
85 externs: RefCell<ExternMap>,
86 item_vals: RefCell<NodeMap<ValueRef>>,
87 needs_unwind_cleanup_cache: RefCell<FnvHashMap<Ty<'tcx>, bool>>,
88 fn_pointer_shims: RefCell<FnvHashMap<Ty<'tcx>, ValueRef>>,
89 drop_glues: RefCell<FnvHashMap<Ty<'tcx>, ValueRef>>,
90 tydescs: RefCell<FnvHashMap<Ty<'tcx>, Rc<tydesc_info<'tcx>>>>,
91 /// Set when running emit_tydescs to enforce that no more tydescs are
93 finished_tydescs: Cell<bool>,
94 /// Track mapping of external ids to local items imported for inlining
95 external: RefCell<DefIdMap<Option<ast::NodeId>>>,
96 /// Backwards version of the `external` map (inlined items to where they
98 external_srcs: RefCell<NodeMap<ast::DefId>>,
99 /// Cache instances of monomorphized functions
100 monomorphized: RefCell<FnvHashMap<MonoId<'tcx>, ValueRef>>,
101 monomorphizing: RefCell<DefIdMap<uint>>,
102 /// Cache generated vtables
103 vtables: RefCell<FnvHashMap<(Ty<'tcx>, ty::PolyTraitRef<'tcx>), ValueRef>>,
104 /// Cache of constant strings,
105 const_cstr_cache: RefCell<FnvHashMap<InternedString, ValueRef>>,
107 /// Reverse-direction for const ptrs cast from globals.
108 /// Key is an int, cast from a ValueRef holding a *T,
109 /// Val is a ValueRef holding a *[T].
111 /// Needed because LLVM loses pointer->pointee association
112 /// when we ptrcast, and we have to ptrcast during translation
113 /// of a [T] const because we form a slice, a [*T,int] pair, not
114 /// a pointer to an LLVM array type.
115 const_globals: RefCell<FnvHashMap<int, ValueRef>>,
117 /// Cache of emitted const values
118 const_values: RefCell<NodeMap<ValueRef>>,
120 /// Cache of emitted static values
121 static_values: RefCell<NodeMap<ValueRef>>,
123 /// Cache of external const values
124 extern_const_values: RefCell<DefIdMap<ValueRef>>,
126 impl_method_cache: RefCell<FnvHashMap<(ast::DefId, ast::Name), ast::DefId>>,
128 /// Cache of closure wrappers for bare fn's.
129 closure_bare_wrapper_cache: RefCell<FnvHashMap<ValueRef, ValueRef>>,
131 lltypes: RefCell<FnvHashMap<Ty<'tcx>, Type>>,
132 llsizingtypes: RefCell<FnvHashMap<Ty<'tcx>, Type>>,
133 adt_reprs: RefCell<FnvHashMap<Ty<'tcx>, Rc<adt::Repr<'tcx>>>>,
134 type_hashcodes: RefCell<FnvHashMap<Ty<'tcx>, String>>,
135 all_llvm_symbols: RefCell<FnvHashSet<String>>,
137 opaque_vec_type: Type,
138 builder: BuilderRef_res,
140 /// Holds the LLVM values for closure IDs.
141 unboxed_closure_vals: RefCell<FnvHashMap<MonoId<'tcx>, ValueRef>>,
143 dbg_cx: Option<debuginfo::CrateDebugContext<'tcx>>,
145 eh_personality: RefCell<Option<ValueRef>>,
147 intrinsics: RefCell<FnvHashMap<&'static str, ValueRef>>,
149 /// Number of LLVM instructions translated into this `LocalCrateContext`.
150 /// This is used to perform some basic load-balancing to keep all LLVM
151 /// contexts around the same size.
152 n_llvm_insns: Cell<uint>,
154 trait_cache: RefCell<FnvHashMap<ty::PolyTraitRef<'tcx>,
155 traits::Vtable<'tcx, ()>>>,
158 pub struct CrateContext<'a, 'tcx: 'a> {
159 shared: &'a SharedCrateContext<'tcx>,
160 local: &'a LocalCrateContext<'tcx>,
161 /// The index of `local` in `shared.local_ccxs`. This is used in
162 /// `maybe_iter(true)` to identify the original `LocalCrateContext`.
166 pub struct CrateContextIterator<'a, 'tcx: 'a> {
167 shared: &'a SharedCrateContext<'tcx>,
171 impl<'a, 'tcx> Iterator for CrateContextIterator<'a,'tcx> {
172 type Item = CrateContext<'a, 'tcx>;
174 fn next(&mut self) -> Option<CrateContext<'a, 'tcx>> {
175 if self.index >= self.shared.local_ccxs.len() {
179 let index = self.index;
184 local: &self.shared.local_ccxs[index],
190 /// The iterator produced by `CrateContext::maybe_iter`.
191 pub struct CrateContextMaybeIterator<'a, 'tcx: 'a> {
192 shared: &'a SharedCrateContext<'tcx>,
198 impl<'a, 'tcx> Iterator for CrateContextMaybeIterator<'a, 'tcx> {
199 type Item = (CrateContext<'a, 'tcx>, bool);
201 fn next(&mut self) -> Option<(CrateContext<'a, 'tcx>, bool)> {
202 if self.index >= self.shared.local_ccxs.len() {
206 let index = self.index;
209 self.index = self.shared.local_ccxs.len();
212 let ccx = CrateContext {
214 local: &self.shared.local_ccxs[index],
217 Some((ccx, index == self.origin))
222 unsafe fn create_context_and_module(sess: &Session, mod_name: &str) -> (ContextRef, ModuleRef) {
223 let llcx = llvm::LLVMContextCreate();
224 let mod_name = CString::from_slice(mod_name.as_bytes());
225 let llmod = llvm::LLVMModuleCreateWithNameInContext(mod_name.as_ptr(), llcx);
227 let data_layout = sess.target.target.data_layout.as_slice();
228 let data_layout = CString::from_slice(data_layout.as_bytes());
229 llvm::LLVMSetDataLayout(llmod, data_layout.as_ptr());
231 let llvm_target = sess.target.target.llvm_target.as_slice();
232 let llvm_target = CString::from_slice(llvm_target.as_bytes());
233 llvm::LLVMRustSetNormalizedTarget(llmod, llvm_target.as_ptr());
237 impl<'tcx> SharedCrateContext<'tcx> {
238 pub fn new(crate_name: &str,
241 export_map: ExportMap,
242 symbol_hasher: Sha256,
245 -> SharedCrateContext<'tcx> {
246 let (metadata_llcx, metadata_llmod) = unsafe {
247 create_context_and_module(&tcx.sess, "metadata")
250 let mut shared_ccx = SharedCrateContext {
251 local_ccxs: Vec::with_capacity(local_count),
252 metadata_llmod: metadata_llmod,
253 metadata_llcx: metadata_llcx,
254 export_map: export_map,
255 reachable: reachable,
256 item_symbols: RefCell::new(NodeMap::new()),
257 link_meta: link_meta,
258 symbol_hasher: RefCell::new(symbol_hasher),
261 n_static_tydescs: Cell::new(0u),
262 n_glues_created: Cell::new(0u),
263 n_null_glues: Cell::new(0u),
264 n_real_glues: Cell::new(0u),
265 n_fns: Cell::new(0u),
266 n_monos: Cell::new(0u),
267 n_inlines: Cell::new(0u),
268 n_closures: Cell::new(0u),
269 n_llvm_insns: Cell::new(0u),
270 llvm_insns: RefCell::new(FnvHashMap::new()),
271 fn_stats: RefCell::new(Vec::new()),
273 available_monomorphizations: RefCell::new(FnvHashSet::new()),
274 available_drop_glues: RefCell::new(FnvHashMap::new()),
277 for i in range(0, local_count) {
278 // Append ".rs" to crate name as LLVM module identifier.
280 // LLVM code generator emits a ".file filename" directive
281 // for ELF backends. Value of the "filename" is set as the
282 // LLVM module identifier. Due to a LLVM MC bug[1], LLVM
283 // crashes if the module identifier is same as other symbols
284 // such as a function name in the module.
285 // 1. http://llvm.org/bugs/show_bug.cgi?id=11479
286 let llmod_id = format!("{}.{}.rs", crate_name, i);
287 let local_ccx = LocalCrateContext::new(&shared_ccx, llmod_id[]);
288 shared_ccx.local_ccxs.push(local_ccx);
294 pub fn iter<'a>(&'a self) -> CrateContextIterator<'a, 'tcx> {
295 CrateContextIterator {
301 pub fn get_ccx<'a>(&'a self, index: uint) -> CrateContext<'a, 'tcx> {
304 local: &self.local_ccxs[index],
309 fn get_smallest_ccx<'a>(&'a self) -> CrateContext<'a, 'tcx> {
310 let (local_ccx, index) =
313 .zip(range(0, self.local_ccxs.len()))
314 .min_by(|&(local_ccx, _idx)| local_ccx.n_llvm_insns.get())
324 pub fn metadata_llmod(&self) -> ModuleRef {
328 pub fn metadata_llcx(&self) -> ContextRef {
332 pub fn export_map<'a>(&'a self) -> &'a ExportMap {
336 pub fn reachable<'a>(&'a self) -> &'a NodeSet {
340 pub fn item_symbols<'a>(&'a self) -> &'a RefCell<NodeMap<String>> {
344 pub fn link_meta<'a>(&'a self) -> &'a LinkMeta {
348 pub fn tcx<'a>(&'a self) -> &'a ty::ctxt<'tcx> {
352 pub fn take_tcx(self) -> ty::ctxt<'tcx> {
356 pub fn sess<'a>(&'a self) -> &'a Session {
360 pub fn stats<'a>(&'a self) -> &'a Stats {
365 impl<'tcx> LocalCrateContext<'tcx> {
366 fn new(shared: &SharedCrateContext<'tcx>,
368 -> LocalCrateContext<'tcx> {
370 let (llcx, llmod) = create_context_and_module(&shared.tcx.sess, name);
372 let td = mk_target_data(shared.tcx
379 let dbg_cx = if shared.tcx.sess.opts.debuginfo != NoDebugInfo {
380 Some(debuginfo::CrateDebugContext::new(llmod))
385 let mut local_ccx = LocalCrateContext {
389 tn: TypeNames::new(),
390 externs: RefCell::new(FnvHashMap::new()),
391 item_vals: RefCell::new(NodeMap::new()),
392 needs_unwind_cleanup_cache: RefCell::new(FnvHashMap::new()),
393 fn_pointer_shims: RefCell::new(FnvHashMap::new()),
394 drop_glues: RefCell::new(FnvHashMap::new()),
395 tydescs: RefCell::new(FnvHashMap::new()),
396 finished_tydescs: Cell::new(false),
397 external: RefCell::new(DefIdMap::new()),
398 external_srcs: RefCell::new(NodeMap::new()),
399 monomorphized: RefCell::new(FnvHashMap::new()),
400 monomorphizing: RefCell::new(DefIdMap::new()),
401 vtables: RefCell::new(FnvHashMap::new()),
402 const_cstr_cache: RefCell::new(FnvHashMap::new()),
403 const_globals: RefCell::new(FnvHashMap::new()),
404 const_values: RefCell::new(NodeMap::new()),
405 static_values: RefCell::new(NodeMap::new()),
406 extern_const_values: RefCell::new(DefIdMap::new()),
407 impl_method_cache: RefCell::new(FnvHashMap::new()),
408 closure_bare_wrapper_cache: RefCell::new(FnvHashMap::new()),
409 lltypes: RefCell::new(FnvHashMap::new()),
410 llsizingtypes: RefCell::new(FnvHashMap::new()),
411 adt_reprs: RefCell::new(FnvHashMap::new()),
412 type_hashcodes: RefCell::new(FnvHashMap::new()),
413 all_llvm_symbols: RefCell::new(FnvHashSet::new()),
414 int_type: Type::from_ref(ptr::null_mut()),
415 opaque_vec_type: Type::from_ref(ptr::null_mut()),
416 builder: BuilderRef_res(llvm::LLVMCreateBuilderInContext(llcx)),
417 unboxed_closure_vals: RefCell::new(FnvHashMap::new()),
419 eh_personality: RefCell::new(None),
420 intrinsics: RefCell::new(FnvHashMap::new()),
421 n_llvm_insns: Cell::new(0u),
422 trait_cache: RefCell::new(FnvHashMap::new()),
425 local_ccx.int_type = Type::int(&local_ccx.dummy_ccx(shared));
426 local_ccx.opaque_vec_type = Type::opaque_vec(&local_ccx.dummy_ccx(shared));
428 // Done mutating local_ccx directly. (The rest of the
429 // initialization goes through RefCell.)
431 let ccx = local_ccx.dummy_ccx(shared);
433 let mut str_slice_ty = Type::named_struct(&ccx, "str_slice");
434 str_slice_ty.set_struct_body(&[Type::i8p(&ccx), ccx.int_type()], false);
435 ccx.tn().associate_type("str_slice", &str_slice_ty);
437 ccx.tn().associate_type("tydesc", &Type::tydesc(&ccx, str_slice_ty));
439 if ccx.sess().count_llvm_insns() {
440 base::init_insn_ctxt()
448 /// Create a dummy `CrateContext` from `self` and the provided
449 /// `SharedCrateContext`. This is somewhat dangerous because `self` may
450 /// not actually be an element of `shared.local_ccxs`, which can cause some
451 /// operations to panic unexpectedly.
453 /// This is used in the `LocalCrateContext` constructor to allow calling
454 /// functions that expect a complete `CrateContext`, even before the local
455 /// portion is fully initialized and attached to the `SharedCrateContext`.
456 fn dummy_ccx<'a>(&'a self, shared: &'a SharedCrateContext<'tcx>)
457 -> CrateContext<'a, 'tcx> {
466 impl<'b, 'tcx> CrateContext<'b, 'tcx> {
467 pub fn shared(&self) -> &'b SharedCrateContext<'tcx> {
471 pub fn local(&self) -> &'b LocalCrateContext<'tcx> {
476 /// Get a (possibly) different `CrateContext` from the same
477 /// `SharedCrateContext`.
478 pub fn rotate(&self) -> CrateContext<'b, 'tcx> {
479 self.shared.get_smallest_ccx()
482 /// Either iterate over only `self`, or iterate over all `CrateContext`s in
483 /// the `SharedCrateContext`. The iterator produces `(ccx, is_origin)`
484 /// pairs, where `is_origin` is `true` if `ccx` is `self` and `false`
485 /// otherwise. This method is useful for avoiding code duplication in
486 /// cases where it may or may not be necessary to translate code into every
488 pub fn maybe_iter(&self, iter_all: bool) -> CrateContextMaybeIterator<'b, 'tcx> {
489 CrateContextMaybeIterator {
491 index: if iter_all { 0 } else { self.index },
498 pub fn tcx<'a>(&'a self) -> &'a ty::ctxt<'tcx> {
502 pub fn sess<'a>(&'a self) -> &'a Session {
503 &self.shared.tcx.sess
506 pub fn builder<'a>(&'a self) -> Builder<'a, 'tcx> {
510 pub fn raw_builder<'a>(&'a self) -> BuilderRef {
514 pub fn tydesc_type(&self) -> Type {
515 self.local.tn.find_type("tydesc").unwrap()
518 pub fn get_intrinsic(&self, key: & &'static str) -> ValueRef {
519 if let Some(v) = self.intrinsics().borrow().get(key).cloned() {
522 match declare_intrinsic(self, key) {
528 pub fn is_split_stack_supported(&self) -> bool {
529 self.sess().target.target.options.morestack
533 pub fn llmod(&self) -> ModuleRef {
537 pub fn llcx(&self) -> ContextRef {
541 pub fn td<'a>(&'a self) -> &'a TargetData {
545 pub fn tn<'a>(&'a self) -> &'a TypeNames {
549 pub fn externs<'a>(&'a self) -> &'a RefCell<ExternMap> {
553 pub fn item_vals<'a>(&'a self) -> &'a RefCell<NodeMap<ValueRef>> {
554 &self.local.item_vals
557 pub fn export_map<'a>(&'a self) -> &'a ExportMap {
558 &self.shared.export_map
561 pub fn reachable<'a>(&'a self) -> &'a NodeSet {
562 &self.shared.reachable
565 pub fn item_symbols<'a>(&'a self) -> &'a RefCell<NodeMap<String>> {
566 &self.shared.item_symbols
569 pub fn link_meta<'a>(&'a self) -> &'a LinkMeta {
570 &self.shared.link_meta
573 pub fn needs_unwind_cleanup_cache(&self) -> &RefCell<FnvHashMap<Ty<'tcx>, bool>> {
574 &self.local.needs_unwind_cleanup_cache
577 pub fn fn_pointer_shims(&self) -> &RefCell<FnvHashMap<Ty<'tcx>, ValueRef>> {
578 &self.local.fn_pointer_shims
581 pub fn drop_glues<'a>(&'a self) -> &'a RefCell<FnvHashMap<Ty<'tcx>, ValueRef>> {
582 &self.local.drop_glues
585 pub fn tydescs<'a>(&'a self) -> &'a RefCell<FnvHashMap<Ty<'tcx>, Rc<tydesc_info<'tcx>>>> {
589 pub fn finished_tydescs<'a>(&'a self) -> &'a Cell<bool> {
590 &self.local.finished_tydescs
593 pub fn external<'a>(&'a self) -> &'a RefCell<DefIdMap<Option<ast::NodeId>>> {
597 pub fn external_srcs<'a>(&'a self) -> &'a RefCell<NodeMap<ast::DefId>> {
598 &self.local.external_srcs
601 pub fn monomorphized<'a>(&'a self) -> &'a RefCell<FnvHashMap<MonoId<'tcx>, ValueRef>> {
602 &self.local.monomorphized
605 pub fn monomorphizing<'a>(&'a self) -> &'a RefCell<DefIdMap<uint>> {
606 &self.local.monomorphizing
609 pub fn vtables<'a>(&'a self) -> &'a RefCell<FnvHashMap<(Ty<'tcx>, ty::PolyTraitRef<'tcx>),
614 pub fn const_cstr_cache<'a>(&'a self) -> &'a RefCell<FnvHashMap<InternedString, ValueRef>> {
615 &self.local.const_cstr_cache
618 pub fn const_globals<'a>(&'a self) -> &'a RefCell<FnvHashMap<int, ValueRef>> {
619 &self.local.const_globals
622 pub fn const_values<'a>(&'a self) -> &'a RefCell<NodeMap<ValueRef>> {
623 &self.local.const_values
626 pub fn static_values<'a>(&'a self) -> &'a RefCell<NodeMap<ValueRef>> {
627 &self.local.static_values
630 pub fn extern_const_values<'a>(&'a self) -> &'a RefCell<DefIdMap<ValueRef>> {
631 &self.local.extern_const_values
634 pub fn impl_method_cache<'a>(&'a self)
635 -> &'a RefCell<FnvHashMap<(ast::DefId, ast::Name), ast::DefId>> {
636 &self.local.impl_method_cache
639 pub fn closure_bare_wrapper_cache<'a>(&'a self) -> &'a RefCell<FnvHashMap<ValueRef, ValueRef>> {
640 &self.local.closure_bare_wrapper_cache
643 pub fn lltypes<'a>(&'a self) -> &'a RefCell<FnvHashMap<Ty<'tcx>, Type>> {
647 pub fn llsizingtypes<'a>(&'a self) -> &'a RefCell<FnvHashMap<Ty<'tcx>, Type>> {
648 &self.local.llsizingtypes
651 pub fn adt_reprs<'a>(&'a self) -> &'a RefCell<FnvHashMap<Ty<'tcx>, Rc<adt::Repr<'tcx>>>> {
652 &self.local.adt_reprs
655 pub fn symbol_hasher<'a>(&'a self) -> &'a RefCell<Sha256> {
656 &self.shared.symbol_hasher
659 pub fn type_hashcodes<'a>(&'a self) -> &'a RefCell<FnvHashMap<Ty<'tcx>, String>> {
660 &self.local.type_hashcodes
663 pub fn all_llvm_symbols<'a>(&'a self) -> &'a RefCell<FnvHashSet<String>> {
664 &self.local.all_llvm_symbols
667 pub fn stats<'a>(&'a self) -> &'a Stats {
671 pub fn available_monomorphizations<'a>(&'a self) -> &'a RefCell<FnvHashSet<String>> {
672 &self.shared.available_monomorphizations
675 pub fn available_drop_glues<'a>(&'a self) -> &'a RefCell<FnvHashMap<Ty<'tcx>, String>> {
676 &self.shared.available_drop_glues
679 pub fn int_type(&self) -> Type {
683 pub fn opaque_vec_type(&self) -> Type {
684 self.local.opaque_vec_type
687 pub fn unboxed_closure_vals<'a>(&'a self) -> &'a RefCell<FnvHashMap<MonoId<'tcx>,ValueRef>> {
688 &self.local.unboxed_closure_vals
691 pub fn dbg_cx<'a>(&'a self) -> &'a Option<debuginfo::CrateDebugContext<'tcx>> {
695 pub fn eh_personality<'a>(&'a self) -> &'a RefCell<Option<ValueRef>> {
696 &self.local.eh_personality
699 fn intrinsics<'a>(&'a self) -> &'a RefCell<FnvHashMap<&'static str, ValueRef>> {
700 &self.local.intrinsics
703 pub fn count_llvm_insn(&self) {
704 self.local.n_llvm_insns.set(self.local.n_llvm_insns.get() + 1);
707 pub fn trait_cache(&self) -> &RefCell<FnvHashMap<ty::PolyTraitRef<'tcx>,
708 traits::Vtable<'tcx, ()>>> {
709 &self.local.trait_cache
712 /// Return exclusive upper bound on object size.
714 /// The theoretical maximum object size is defined as the maximum positive `int` value. This
715 /// ensures that the `offset` semantics remain well-defined by allowing it to correctly index
716 /// every address within an object along with one byte past the end, along with allowing `int`
717 /// to store the difference between any two pointers into an object.
719 /// The upper bound on 64-bit currently needs to be lower because LLVM uses a 64-bit integer to
720 /// represent object size in bits. It would need to be 1 << 61 to account for this, but is
721 /// currently conservatively bounded to 1 << 47 as that is enough to cover the current usable
722 /// address space on 64-bit ARMv8 and x86_64.
723 pub fn obj_size_bound(&self) -> u64 {
724 match self.sess().target.target.target_word_size[] {
727 _ => unreachable!() // error handled by config::build_target_config
731 pub fn report_overbig_object(&self, obj: Ty<'tcx>) -> ! {
733 format!("the type `{}` is too big for the current architecture",
734 obj.repr(self.tcx()))[])
738 fn declare_intrinsic(ccx: &CrateContext, key: & &'static str) -> Option<ValueRef> {
740 ($name:expr fn() -> $ret:expr) => (
742 let f = base::decl_cdecl_fn(
743 ccx, $name, Type::func(&[], &$ret),
744 ty::mk_nil(ccx.tcx()));
745 ccx.intrinsics().borrow_mut().insert($name, f.clone());
749 ($name:expr fn($($arg:expr),*) -> $ret:expr) => (
751 let f = base::decl_cdecl_fn(ccx, $name,
752 Type::func(&[$($arg),*], &$ret), ty::mk_nil(ccx.tcx()));
753 ccx.intrinsics().borrow_mut().insert($name, f.clone());
758 macro_rules! mk_struct {
759 ($($field_ty:expr),*) => (Type::struct_(ccx, &[$($field_ty),*], false))
762 let i8p = Type::i8p(ccx);
763 let void = Type::void(ccx);
764 let i1 = Type::i1(ccx);
765 let t_i8 = Type::i8(ccx);
766 let t_i16 = Type::i16(ccx);
767 let t_i32 = Type::i32(ccx);
768 let t_i64 = Type::i64(ccx);
769 let t_f32 = Type::f32(ccx);
770 let t_f64 = Type::f64(ccx);
772 ifn!("llvm.memcpy.p0i8.p0i8.i32" fn(i8p, i8p, t_i32, t_i32, i1) -> void);
773 ifn!("llvm.memcpy.p0i8.p0i8.i64" fn(i8p, i8p, t_i64, t_i32, i1) -> void);
774 ifn!("llvm.memmove.p0i8.p0i8.i32" fn(i8p, i8p, t_i32, t_i32, i1) -> void);
775 ifn!("llvm.memmove.p0i8.p0i8.i64" fn(i8p, i8p, t_i64, t_i32, i1) -> void);
776 ifn!("llvm.memset.p0i8.i32" fn(i8p, t_i8, t_i32, t_i32, i1) -> void);
777 ifn!("llvm.memset.p0i8.i64" fn(i8p, t_i8, t_i64, t_i32, i1) -> void);
779 ifn!("llvm.trap" fn() -> void);
780 ifn!("llvm.debugtrap" fn() -> void);
781 ifn!("llvm.frameaddress" fn(t_i32) -> i8p);
783 ifn!("llvm.powi.f32" fn(t_f32, t_i32) -> t_f32);
784 ifn!("llvm.powi.f64" fn(t_f64, t_i32) -> t_f64);
785 ifn!("llvm.pow.f32" fn(t_f32, t_f32) -> t_f32);
786 ifn!("llvm.pow.f64" fn(t_f64, t_f64) -> t_f64);
788 ifn!("llvm.sqrt.f32" fn(t_f32) -> t_f32);
789 ifn!("llvm.sqrt.f64" fn(t_f64) -> t_f64);
790 ifn!("llvm.sin.f32" fn(t_f32) -> t_f32);
791 ifn!("llvm.sin.f64" fn(t_f64) -> t_f64);
792 ifn!("llvm.cos.f32" fn(t_f32) -> t_f32);
793 ifn!("llvm.cos.f64" fn(t_f64) -> t_f64);
794 ifn!("llvm.exp.f32" fn(t_f32) -> t_f32);
795 ifn!("llvm.exp.f64" fn(t_f64) -> t_f64);
796 ifn!("llvm.exp2.f32" fn(t_f32) -> t_f32);
797 ifn!("llvm.exp2.f64" fn(t_f64) -> t_f64);
798 ifn!("llvm.log.f32" fn(t_f32) -> t_f32);
799 ifn!("llvm.log.f64" fn(t_f64) -> t_f64);
800 ifn!("llvm.log10.f32" fn(t_f32) -> t_f32);
801 ifn!("llvm.log10.f64" fn(t_f64) -> t_f64);
802 ifn!("llvm.log2.f32" fn(t_f32) -> t_f32);
803 ifn!("llvm.log2.f64" fn(t_f64) -> t_f64);
805 ifn!("llvm.fma.f32" fn(t_f32, t_f32, t_f32) -> t_f32);
806 ifn!("llvm.fma.f64" fn(t_f64, t_f64, t_f64) -> t_f64);
808 ifn!("llvm.fabs.f32" fn(t_f32) -> t_f32);
809 ifn!("llvm.fabs.f64" fn(t_f64) -> t_f64);
811 ifn!("llvm.floor.f32" fn(t_f32) -> t_f32);
812 ifn!("llvm.floor.f64" fn(t_f64) -> t_f64);
813 ifn!("llvm.ceil.f32" fn(t_f32) -> t_f32);
814 ifn!("llvm.ceil.f64" fn(t_f64) -> t_f64);
815 ifn!("llvm.trunc.f32" fn(t_f32) -> t_f32);
816 ifn!("llvm.trunc.f64" fn(t_f64) -> t_f64);
818 ifn!("llvm.rint.f32" fn(t_f32) -> t_f32);
819 ifn!("llvm.rint.f64" fn(t_f64) -> t_f64);
820 ifn!("llvm.nearbyint.f32" fn(t_f32) -> t_f32);
821 ifn!("llvm.nearbyint.f64" fn(t_f64) -> t_f64);
823 ifn!("llvm.ctpop.i8" fn(t_i8) -> t_i8);
824 ifn!("llvm.ctpop.i16" fn(t_i16) -> t_i16);
825 ifn!("llvm.ctpop.i32" fn(t_i32) -> t_i32);
826 ifn!("llvm.ctpop.i64" fn(t_i64) -> t_i64);
828 ifn!("llvm.ctlz.i8" fn(t_i8 , i1) -> t_i8);
829 ifn!("llvm.ctlz.i16" fn(t_i16, i1) -> t_i16);
830 ifn!("llvm.ctlz.i32" fn(t_i32, i1) -> t_i32);
831 ifn!("llvm.ctlz.i64" fn(t_i64, i1) -> t_i64);
833 ifn!("llvm.cttz.i8" fn(t_i8 , i1) -> t_i8);
834 ifn!("llvm.cttz.i16" fn(t_i16, i1) -> t_i16);
835 ifn!("llvm.cttz.i32" fn(t_i32, i1) -> t_i32);
836 ifn!("llvm.cttz.i64" fn(t_i64, i1) -> t_i64);
838 ifn!("llvm.bswap.i16" fn(t_i16) -> t_i16);
839 ifn!("llvm.bswap.i32" fn(t_i32) -> t_i32);
840 ifn!("llvm.bswap.i64" fn(t_i64) -> t_i64);
842 ifn!("llvm.sadd.with.overflow.i8" fn(t_i8, t_i8) -> mk_struct!{t_i8, i1});
843 ifn!("llvm.sadd.with.overflow.i16" fn(t_i16, t_i16) -> mk_struct!{t_i16, i1});
844 ifn!("llvm.sadd.with.overflow.i32" fn(t_i32, t_i32) -> mk_struct!{t_i32, i1});
845 ifn!("llvm.sadd.with.overflow.i64" fn(t_i64, t_i64) -> mk_struct!{t_i64, i1});
847 ifn!("llvm.uadd.with.overflow.i8" fn(t_i8, t_i8) -> mk_struct!{t_i8, i1});
848 ifn!("llvm.uadd.with.overflow.i16" fn(t_i16, t_i16) -> mk_struct!{t_i16, i1});
849 ifn!("llvm.uadd.with.overflow.i32" fn(t_i32, t_i32) -> mk_struct!{t_i32, i1});
850 ifn!("llvm.uadd.with.overflow.i64" fn(t_i64, t_i64) -> mk_struct!{t_i64, i1});
852 ifn!("llvm.ssub.with.overflow.i8" fn(t_i8, t_i8) -> mk_struct!{t_i8, i1});
853 ifn!("llvm.ssub.with.overflow.i16" fn(t_i16, t_i16) -> mk_struct!{t_i16, i1});
854 ifn!("llvm.ssub.with.overflow.i32" fn(t_i32, t_i32) -> mk_struct!{t_i32, i1});
855 ifn!("llvm.ssub.with.overflow.i64" fn(t_i64, t_i64) -> mk_struct!{t_i64, i1});
857 ifn!("llvm.usub.with.overflow.i8" fn(t_i8, t_i8) -> mk_struct!{t_i8, i1});
858 ifn!("llvm.usub.with.overflow.i16" fn(t_i16, t_i16) -> mk_struct!{t_i16, i1});
859 ifn!("llvm.usub.with.overflow.i32" fn(t_i32, t_i32) -> mk_struct!{t_i32, i1});
860 ifn!("llvm.usub.with.overflow.i64" fn(t_i64, t_i64) -> mk_struct!{t_i64, i1});
862 ifn!("llvm.smul.with.overflow.i8" fn(t_i8, t_i8) -> mk_struct!{t_i8, i1});
863 ifn!("llvm.smul.with.overflow.i16" fn(t_i16, t_i16) -> mk_struct!{t_i16, i1});
864 ifn!("llvm.smul.with.overflow.i32" fn(t_i32, t_i32) -> mk_struct!{t_i32, i1});
865 ifn!("llvm.smul.with.overflow.i64" fn(t_i64, t_i64) -> mk_struct!{t_i64, i1});
867 ifn!("llvm.umul.with.overflow.i8" fn(t_i8, t_i8) -> mk_struct!{t_i8, i1});
868 ifn!("llvm.umul.with.overflow.i16" fn(t_i16, t_i16) -> mk_struct!{t_i16, i1});
869 ifn!("llvm.umul.with.overflow.i32" fn(t_i32, t_i32) -> mk_struct!{t_i32, i1});
870 ifn!("llvm.umul.with.overflow.i64" fn(t_i64, t_i64) -> mk_struct!{t_i64, i1});
872 ifn!("llvm.lifetime.start" fn(t_i64,i8p) -> void);
873 ifn!("llvm.lifetime.end" fn(t_i64, i8p) -> void);
875 ifn!("llvm.expect.i1" fn(i1, i1) -> i1);
876 ifn!("llvm.assume" fn(i1) -> void);
878 // Some intrinsics were introduced in later versions of LLVM, but they have
879 // fallbacks in libc or libm and such. Currently, all of these intrinsics
880 // were introduced in LLVM 3.4, so we case on that.
881 macro_rules! compatible_ifn {
882 ($name:expr, $cname:ident ($($arg:expr),*) -> $ret:expr) => (
883 if unsafe { llvm::LLVMVersionMinor() >= 4 } {
884 // The `if key == $name` is already in ifn!
885 ifn!($name fn($($arg),*) -> $ret);
886 } else if *key == $name {
887 let f = base::decl_cdecl_fn(ccx, stringify!($cname),
888 Type::func(&[$($arg),*], &$ret),
889 ty::mk_nil(ccx.tcx()));
890 ccx.intrinsics().borrow_mut().insert($name, f.clone());
896 compatible_ifn!("llvm.copysign.f32", copysignf(t_f32, t_f32) -> t_f32);
897 compatible_ifn!("llvm.copysign.f64", copysign(t_f64, t_f64) -> t_f64);
898 compatible_ifn!("llvm.round.f32", roundf(t_f32) -> t_f32);
899 compatible_ifn!("llvm.round.f64", round(t_f64) -> t_f64);
902 if ccx.sess().opts.debuginfo != NoDebugInfo {
903 ifn!("llvm.dbg.declare" fn(Type::metadata(ccx), Type::metadata(ccx)) -> void);
904 ifn!("llvm.dbg.value" fn(Type::metadata(ccx), t_i64, Type::metadata(ccx)) -> void);