2 use crate::back::write::to_llvm_code_model;
3 use crate::callee::get_fn;
4 use crate::coverageinfo;
8 use crate::type_::Type;
9 use crate::value::Value;
12 use rustc_codegen_ssa::base::wants_msvc_seh;
13 use rustc_codegen_ssa::traits::*;
14 use rustc_data_structures::base_n;
15 use rustc_data_structures::fx::FxHashMap;
16 use rustc_data_structures::small_c_str::SmallCStr;
17 use rustc_middle::bug;
18 use rustc_middle::mir::mono::CodegenUnit;
19 use rustc_middle::ty::layout::{HasParamEnv, LayoutError, TyAndLayout};
20 use rustc_middle::ty::{self, Instance, Ty, TyCtxt};
21 use rustc_session::config::{CFGuard, CrateType, DebugInfo};
22 use rustc_session::Session;
23 use rustc_span::source_map::{Span, DUMMY_SP};
24 use rustc_span::symbol::Symbol;
25 use rustc_target::abi::{HasDataLayout, LayoutOf, PointeeInfo, Size, TargetDataLayout, VariantIdx};
26 use rustc_target::spec::{HasTargetSpec, RelocModel, Target, TlsModel};
28 use std::cell::{Cell, RefCell};
32 /// There is one `CodegenCx` per compilation unit. Each one has its own LLVM
33 /// `llvm::Context` so that several compilation units may be optimized in parallel.
34 /// All other LLVM data structures in the `CodegenCx` are tied to that `llvm::Context`.
35 pub struct CodegenCx<'ll, 'tcx> {
36 pub tcx: TyCtxt<'tcx>,
37 pub check_overflow: bool,
38 pub use_dll_storage_attrs: bool,
39 pub tls_model: llvm::ThreadLocalMode,
41 pub llmod: &'ll llvm::Module,
42 pub llcx: &'ll llvm::Context,
43 pub codegen_unit: &'tcx CodegenUnit<'tcx>,
45 /// Cache instances of monomorphic and polymorphic items
46 pub instances: RefCell<FxHashMap<Instance<'tcx>, &'ll Value>>,
47 /// Cache generated vtables
49 RefCell<FxHashMap<(Ty<'tcx>, Option<ty::PolyExistentialTraitRef<'tcx>>), &'ll Value>>,
50 /// Cache of constant strings,
51 pub const_cstr_cache: RefCell<FxHashMap<Symbol, &'ll Value>>,
53 /// Reverse-direction for const ptrs cast from globals.
55 /// Key is a Value holding a `*T`,
56 /// Val is a Value holding a `*[T]`.
58 /// Needed because LLVM loses pointer->pointee association
59 /// when we ptrcast, and we have to ptrcast during codegen
60 /// of a `[T]` const because we form a slice, a `(*T,usize)` pair, not
61 /// a pointer to an LLVM array type. Similar for trait objects.
62 pub const_unsized: RefCell<FxHashMap<&'ll Value, &'ll Value>>,
64 /// Cache of emitted const globals (value -> global)
65 pub const_globals: RefCell<FxHashMap<&'ll Value, &'ll Value>>,
67 /// List of globals for static variables which need to be passed to the
68 /// LLVM function ReplaceAllUsesWith (RAUW) when codegen is complete.
69 /// (We have to make sure we don't invalidate any Values referring
71 pub statics_to_rauw: RefCell<Vec<(&'ll Value, &'ll Value)>>,
73 /// Statics that will be placed in the llvm.used variable
74 /// See <http://llvm.org/docs/LangRef.html#the-llvm-used-global-variable> for details
75 pub used_statics: RefCell<Vec<&'ll Value>>,
77 pub lltypes: RefCell<FxHashMap<(Ty<'tcx>, Option<VariantIdx>), &'ll Type>>,
78 pub scalar_lltypes: RefCell<FxHashMap<Ty<'tcx>, &'ll Type>>,
79 pub pointee_infos: RefCell<FxHashMap<(Ty<'tcx>, Size), Option<PointeeInfo>>>,
80 pub isize_ty: &'ll Type,
82 pub coverage_cx: Option<coverageinfo::CrateCoverageContext<'tcx>>,
83 pub dbg_cx: Option<debuginfo::CrateDebugContext<'ll, 'tcx>>,
85 eh_personality: Cell<Option<&'ll Value>>,
86 eh_catch_typeinfo: Cell<Option<&'ll Value>>,
87 pub rust_try_fn: Cell<Option<&'ll Value>>,
89 intrinsics: RefCell<FxHashMap<&'static str, &'ll Value>>,
91 /// A counter that is used for generating local symbol names
92 local_gen_sym_counter: Cell<usize>,
95 fn to_llvm_tls_model(tls_model: TlsModel) -> llvm::ThreadLocalMode {
97 TlsModel::GeneralDynamic => llvm::ThreadLocalMode::GeneralDynamic,
98 TlsModel::LocalDynamic => llvm::ThreadLocalMode::LocalDynamic,
99 TlsModel::InitialExec => llvm::ThreadLocalMode::InitialExec,
100 TlsModel::LocalExec => llvm::ThreadLocalMode::LocalExec,
104 fn strip_x86_address_spaces(data_layout: String) -> String {
105 data_layout.replace("-p270:32:32-p271:32:32-p272:64:64-", "-")
108 fn strip_powerpc64_vectors(data_layout: String) -> String {
109 data_layout.replace("-v256:256:256-v512:512:512", "")
112 pub unsafe fn create_module(
114 llcx: &'ll llvm::Context,
116 ) -> &'ll llvm::Module {
118 let mod_name = SmallCStr::new(mod_name);
119 let llmod = llvm::LLVMModuleCreateWithNameInContext(mod_name.as_ptr(), llcx);
121 let mut target_data_layout = sess.target.data_layout.clone();
122 if llvm_util::get_version() < (10, 0, 0)
123 && (sess.target.arch == "x86" || sess.target.arch == "x86_64")
125 target_data_layout = strip_x86_address_spaces(target_data_layout);
127 if llvm_util::get_version() < (12, 0, 0) && sess.target.arch == "powerpc64" {
128 target_data_layout = strip_powerpc64_vectors(target_data_layout);
131 // Ensure the data-layout values hardcoded remain the defaults.
132 if sess.target.is_builtin {
133 let tm = crate::back::write::create_informational_target_machine(tcx.sess);
134 llvm::LLVMRustSetDataLayoutFromTargetMachine(llmod, tm);
135 llvm::LLVMRustDisposeTargetMachine(tm);
137 let llvm_data_layout = llvm::LLVMGetDataLayoutStr(llmod);
138 let llvm_data_layout = str::from_utf8(CStr::from_ptr(llvm_data_layout).to_bytes())
139 .expect("got a non-UTF8 data-layout from LLVM");
141 // Unfortunately LLVM target specs change over time, and right now we
142 // don't have proper support to work with any more than one
143 // `data_layout` than the one that is in the rust-lang/rust repo. If
144 // this compiler is configured against a custom LLVM, we may have a
145 // differing data layout, even though we should update our own to use
148 // As an interim hack, if CFG_LLVM_ROOT is not an empty string then we
149 // disable this check entirely as we may be configured with something
150 // that has a different target layout.
152 // Unsure if this will actually cause breakage when rustc is configured
156 let cfg_llvm_root = option_env!("CFG_LLVM_ROOT").unwrap_or("");
157 let custom_llvm_used = cfg_llvm_root.trim() != "";
159 if !custom_llvm_used && target_data_layout != llvm_data_layout {
161 "data-layout for builtin `{}` target, `{}`, \
162 differs from LLVM default, `{}`",
163 sess.target.llvm_target,
170 let data_layout = SmallCStr::new(&target_data_layout);
171 llvm::LLVMSetDataLayout(llmod, data_layout.as_ptr());
173 let llvm_target = SmallCStr::new(&sess.target.llvm_target);
174 llvm::LLVMRustSetNormalizedTarget(llmod, llvm_target.as_ptr());
176 if sess.relocation_model() == RelocModel::Pic {
177 llvm::LLVMRustSetModulePICLevel(llmod);
178 // PIE is potentially more effective than PIC, but can only be used in executables.
179 // If all our outputs are executables, then we can relax PIC to PIE.
180 if sess.crate_types().iter().all(|ty| *ty == CrateType::Executable) {
181 llvm::LLVMRustSetModulePIELevel(llmod);
185 // Linking object files with different code models is undefined behavior
186 // because the compiler would have to generate additional code (to span
187 // longer jumps) if a larger code model is used with a smaller one.
189 // See https://reviews.llvm.org/D52322 and https://reviews.llvm.org/D52323.
190 llvm::LLVMRustSetModuleCodeModel(llmod, to_llvm_code_model(sess.code_model()));
192 // If skipping the PLT is enabled, we need to add some module metadata
193 // to ensure intrinsic calls don't use it.
194 if !sess.needs_plt() {
195 let avoid_plt = "RtLibUseGOT\0".as_ptr().cast();
196 llvm::LLVMRustAddModuleFlag(llmod, avoid_plt, 1);
199 // Control Flow Guard is currently only supported by the MSVC linker on Windows.
200 if sess.target.is_like_msvc {
201 match sess.opts.cg.control_flow_guard {
202 CFGuard::Disabled => {}
203 CFGuard::NoChecks => {
204 // Set `cfguard=1` module flag to emit metadata only.
205 llvm::LLVMRustAddModuleFlag(llmod, "cfguard\0".as_ptr() as *const _, 1)
208 // Set `cfguard=2` module flag to emit metadata and checks.
209 llvm::LLVMRustAddModuleFlag(llmod, "cfguard\0".as_ptr() as *const _, 2)
217 impl<'ll, 'tcx> CodegenCx<'ll, 'tcx> {
220 codegen_unit: &'tcx CodegenUnit<'tcx>,
221 llvm_module: &'ll crate::ModuleLlvm,
223 // An interesting part of Windows which MSVC forces our hand on (and
224 // apparently MinGW didn't) is the usage of `dllimport` and `dllexport`
225 // attributes in LLVM IR as well as native dependencies (in C these
226 // correspond to `__declspec(dllimport)`).
228 // LD (BFD) in MinGW mode can often correctly guess `dllexport` but
229 // relying on that can result in issues like #50176.
230 // LLD won't support that and expects symbols with proper attributes.
231 // Because of that we make MinGW target emit dllexport just like MSVC.
232 // When it comes to dllimport we use it for constants but for functions
233 // rely on the linker to do the right thing. Opposed to dllexport this
234 // task is easy for them (both LD and LLD) and allows us to easily use
235 // symbols from static libraries in shared libraries.
237 // Whenever a dynamic library is built on Windows it must have its public
238 // interface specified by functions tagged with `dllexport` or otherwise
239 // they're not available to be linked against. This poses a few problems
240 // for the compiler, some of which are somewhat fundamental, but we use
241 // the `use_dll_storage_attrs` variable below to attach the `dllexport`
242 // attribute to all LLVM functions that are exported e.g., they're
243 // already tagged with external linkage). This is suboptimal for a few
246 // * If an object file will never be included in a dynamic library,
247 // there's no need to attach the dllexport attribute. Most object
248 // files in Rust are not destined to become part of a dll as binaries
249 // are statically linked by default.
250 // * If the compiler is emitting both an rlib and a dylib, the same
251 // source object file is currently used but with MSVC this may be less
252 // feasible. The compiler may be able to get around this, but it may
253 // involve some invasive changes to deal with this.
255 // The flipside of this situation is that whenever you link to a dll and
256 // you import a function from it, the import should be tagged with
257 // `dllimport`. At this time, however, the compiler does not emit
258 // `dllimport` for any declarations other than constants (where it is
259 // required), which is again suboptimal for even more reasons!
261 // * Calling a function imported from another dll without using
262 // `dllimport` causes the linker/compiler to have extra overhead (one
263 // `jmp` instruction on x86) when calling the function.
264 // * The same object file may be used in different circumstances, so a
265 // function may be imported from a dll if the object is linked into a
266 // dll, but it may be just linked against if linked into an rlib.
267 // * The compiler has no knowledge about whether native functions should
268 // be tagged dllimport or not.
270 // For now the compiler takes the perf hit (I do not have any numbers to
271 // this effect) by marking very little as `dllimport` and praying the
272 // linker will take care of everything. Fixing this problem will likely
273 // require adding a few attributes to Rust itself (feature gated at the
274 // start) and then strongly recommending static linkage on Windows!
275 let use_dll_storage_attrs = tcx.sess.target.is_like_windows;
277 let check_overflow = tcx.sess.overflow_checks();
279 let tls_model = to_llvm_tls_model(tcx.sess.tls_model());
281 let (llcx, llmod) = (&*llvm_module.llcx, llvm_module.llmod());
283 let coverage_cx = if tcx.sess.opts.debugging_opts.instrument_coverage {
284 let covctx = coverageinfo::CrateCoverageContext::new();
290 let dbg_cx = if tcx.sess.opts.debuginfo != DebugInfo::None {
291 let dctx = debuginfo::CrateDebugContext::new(llmod);
292 debuginfo::metadata::compile_unit_metadata(tcx, &codegen_unit.name().as_str(), &dctx);
298 let isize_ty = Type::ix_llcx(llcx, tcx.data_layout.pointer_size.bits());
303 use_dll_storage_attrs,
308 instances: Default::default(),
309 vtables: Default::default(),
310 const_cstr_cache: Default::default(),
311 const_unsized: Default::default(),
312 const_globals: Default::default(),
313 statics_to_rauw: RefCell::new(Vec::new()),
314 used_statics: RefCell::new(Vec::new()),
315 lltypes: Default::default(),
316 scalar_lltypes: Default::default(),
317 pointee_infos: Default::default(),
321 eh_personality: Cell::new(None),
322 eh_catch_typeinfo: Cell::new(None),
323 rust_try_fn: Cell::new(None),
324 intrinsics: Default::default(),
325 local_gen_sym_counter: Cell::new(0),
329 crate fn statics_to_rauw(&self) -> &RefCell<Vec<(&'ll Value, &'ll Value)>> {
330 &self.statics_to_rauw
334 pub fn coverage_context(&'a self) -> Option<&'a coverageinfo::CrateCoverageContext<'tcx>> {
335 self.coverage_cx.as_ref()
339 impl MiscMethods<'tcx> for CodegenCx<'ll, 'tcx> {
342 ) -> &RefCell<FxHashMap<(Ty<'tcx>, Option<ty::PolyExistentialTraitRef<'tcx>>), &'ll Value>>
347 fn get_fn(&self, instance: Instance<'tcx>) -> &'ll Value {
348 get_fn(self, instance)
351 fn get_fn_addr(&self, instance: Instance<'tcx>) -> &'ll Value {
352 get_fn(self, instance)
355 fn eh_personality(&self) -> &'ll Value {
356 // The exception handling personality function.
358 // If our compilation unit has the `eh_personality` lang item somewhere
359 // within it, then we just need to codegen that. Otherwise, we're
360 // building an rlib which will depend on some upstream implementation of
361 // this function, so we just codegen a generic reference to it. We don't
362 // specify any of the types for the function, we just make it a symbol
363 // that LLVM can later use.
365 // Note that MSVC is a little special here in that we don't use the
366 // `eh_personality` lang item at all. Currently LLVM has support for
367 // both Dwarf and SEH unwind mechanisms for MSVC targets and uses the
368 // *name of the personality function* to decide what kind of unwind side
369 // tables/landing pads to emit. It looks like Dwarf is used by default,
370 // injecting a dependency on the `_Unwind_Resume` symbol for resuming
371 // an "exception", but for MSVC we want to force SEH. This means that we
372 // can't actually have the personality function be our standard
373 // `rust_eh_personality` function, but rather we wired it up to the
374 // CRT's custom personality function, which forces LLVM to consider
375 // landing pads as "landing pads for SEH".
376 if let Some(llpersonality) = self.eh_personality.get() {
377 return llpersonality;
380 let llfn = match tcx.lang_items().eh_personality() {
381 Some(def_id) if !wants_msvc_seh(self.sess()) => self.get_fn_addr(
382 ty::Instance::resolve(
384 ty::ParamEnv::reveal_all(),
386 tcx.intern_substs(&[]),
392 let name = if wants_msvc_seh(self.sess()) {
395 "rust_eh_personality"
397 let fty = self.type_variadic_func(&[], self.type_i32());
398 self.declare_cfn(name, llvm::UnnamedAddr::Global, fty)
401 attributes::apply_target_cpu_attr(self, llfn);
402 self.eh_personality.set(Some(llfn));
406 fn sess(&self) -> &Session {
410 fn check_overflow(&self) -> bool {
414 fn codegen_unit(&self) -> &'tcx CodegenUnit<'tcx> {
418 fn used_statics(&self) -> &RefCell<Vec<&'ll Value>> {
422 fn set_frame_pointer_elimination(&self, llfn: &'ll Value) {
423 attributes::set_frame_pointer_elimination(self, llfn)
426 fn apply_target_cpu_attr(&self, llfn: &'ll Value) {
427 attributes::apply_target_cpu_attr(self, llfn);
428 attributes::apply_tune_cpu_attr(self, llfn);
431 fn create_used_variable(&self) {
432 let name = cstr!("llvm.used");
433 let section = cstr!("llvm.metadata");
435 self.const_array(&self.type_ptr_to(self.type_i8()), &*self.used_statics.borrow());
438 let g = llvm::LLVMAddGlobal(self.llmod, self.val_ty(array), name.as_ptr());
439 llvm::LLVMSetInitializer(g, array);
440 llvm::LLVMRustSetLinkage(g, llvm::Linkage::AppendingLinkage);
441 llvm::LLVMSetSection(g, section.as_ptr());
445 fn declare_c_main(&self, fn_type: Self::Type) -> Option<Self::Function> {
446 if self.get_declared_value("main").is_none() {
447 Some(self.declare_cfn("main", llvm::UnnamedAddr::Global, fn_type))
449 // If the symbol already exists, it is an error: for example, the user wrote
450 // #[no_mangle] extern "C" fn main(..) {..}
451 // instead of #[start]
457 impl CodegenCx<'b, 'tcx> {
458 crate fn get_intrinsic(&self, key: &str) -> &'b Value {
459 if let Some(v) = self.intrinsics.borrow().get(key).cloned() {
463 self.declare_intrinsic(key).unwrap_or_else(|| bug!("unknown intrinsic '{}'", key))
469 args: Option<&[&'b llvm::Type]>,
471 ) -> &'b llvm::Value {
472 let fn_ty = if let Some(args) = args {
473 self.type_func(args, ret)
475 self.type_variadic_func(&[], ret)
477 let f = self.declare_cfn(name, llvm::UnnamedAddr::No, fn_ty);
478 self.intrinsics.borrow_mut().insert(name, f);
482 fn declare_intrinsic(&self, key: &str) -> Option<&'b Value> {
484 ($name:expr, fn() -> $ret:expr) => (
486 return Some(self.insert_intrinsic($name, Some(&[]), $ret));
489 ($name:expr, fn(...) -> $ret:expr) => (
491 return Some(self.insert_intrinsic($name, None, $ret));
494 ($name:expr, fn($($arg:expr),*) -> $ret:expr) => (
496 return Some(self.insert_intrinsic($name, Some(&[$($arg),*]), $ret));
500 macro_rules! mk_struct {
501 ($($field_ty:expr),*) => (self.type_struct( &[$($field_ty),*], false))
504 let i8p = self.type_i8p();
505 let void = self.type_void();
506 let i1 = self.type_i1();
507 let t_i8 = self.type_i8();
508 let t_i16 = self.type_i16();
509 let t_i32 = self.type_i32();
510 let t_i64 = self.type_i64();
511 let t_i128 = self.type_i128();
512 let t_f32 = self.type_f32();
513 let t_f64 = self.type_f64();
515 ifn!("llvm.wasm.trunc.saturate.unsigned.i32.f32", fn(t_f32) -> t_i32);
516 ifn!("llvm.wasm.trunc.saturate.unsigned.i32.f64", fn(t_f64) -> t_i32);
517 ifn!("llvm.wasm.trunc.saturate.unsigned.i64.f32", fn(t_f32) -> t_i64);
518 ifn!("llvm.wasm.trunc.saturate.unsigned.i64.f64", fn(t_f64) -> t_i64);
519 ifn!("llvm.wasm.trunc.saturate.signed.i32.f32", fn(t_f32) -> t_i32);
520 ifn!("llvm.wasm.trunc.saturate.signed.i32.f64", fn(t_f64) -> t_i32);
521 ifn!("llvm.wasm.trunc.saturate.signed.i64.f32", fn(t_f32) -> t_i64);
522 ifn!("llvm.wasm.trunc.saturate.signed.i64.f64", fn(t_f64) -> t_i64);
523 ifn!("llvm.wasm.trunc.unsigned.i32.f32", fn(t_f32) -> t_i32);
524 ifn!("llvm.wasm.trunc.unsigned.i32.f64", fn(t_f64) -> t_i32);
525 ifn!("llvm.wasm.trunc.unsigned.i64.f32", fn(t_f32) -> t_i64);
526 ifn!("llvm.wasm.trunc.unsigned.i64.f64", fn(t_f64) -> t_i64);
527 ifn!("llvm.wasm.trunc.signed.i32.f32", fn(t_f32) -> t_i32);
528 ifn!("llvm.wasm.trunc.signed.i32.f64", fn(t_f64) -> t_i32);
529 ifn!("llvm.wasm.trunc.signed.i64.f32", fn(t_f32) -> t_i64);
530 ifn!("llvm.wasm.trunc.signed.i64.f64", fn(t_f64) -> t_i64);
532 ifn!("llvm.trap", fn() -> void);
533 ifn!("llvm.debugtrap", fn() -> void);
534 ifn!("llvm.frameaddress", fn(t_i32) -> i8p);
535 ifn!("llvm.sideeffect", fn() -> void);
537 ifn!("llvm.powi.f32", fn(t_f32, t_i32) -> t_f32);
538 ifn!("llvm.powi.f64", fn(t_f64, t_i32) -> t_f64);
540 ifn!("llvm.pow.f32", fn(t_f32, t_f32) -> t_f32);
541 ifn!("llvm.pow.f64", fn(t_f64, t_f64) -> t_f64);
543 ifn!("llvm.sqrt.f32", fn(t_f32) -> t_f32);
544 ifn!("llvm.sqrt.f64", fn(t_f64) -> t_f64);
546 ifn!("llvm.sin.f32", fn(t_f32) -> t_f32);
547 ifn!("llvm.sin.f64", fn(t_f64) -> t_f64);
549 ifn!("llvm.cos.f32", fn(t_f32) -> t_f32);
550 ifn!("llvm.cos.f64", fn(t_f64) -> t_f64);
552 ifn!("llvm.exp.f32", fn(t_f32) -> t_f32);
553 ifn!("llvm.exp.f64", fn(t_f64) -> t_f64);
555 ifn!("llvm.exp2.f32", fn(t_f32) -> t_f32);
556 ifn!("llvm.exp2.f64", fn(t_f64) -> t_f64);
558 ifn!("llvm.log.f32", fn(t_f32) -> t_f32);
559 ifn!("llvm.log.f64", fn(t_f64) -> t_f64);
561 ifn!("llvm.log10.f32", fn(t_f32) -> t_f32);
562 ifn!("llvm.log10.f64", fn(t_f64) -> t_f64);
564 ifn!("llvm.log2.f32", fn(t_f32) -> t_f32);
565 ifn!("llvm.log2.f64", fn(t_f64) -> t_f64);
567 ifn!("llvm.fma.f32", fn(t_f32, t_f32, t_f32) -> t_f32);
568 ifn!("llvm.fma.f64", fn(t_f64, t_f64, t_f64) -> t_f64);
570 ifn!("llvm.fabs.f32", fn(t_f32) -> t_f32);
571 ifn!("llvm.fabs.f64", fn(t_f64) -> t_f64);
573 ifn!("llvm.minnum.f32", fn(t_f32, t_f32) -> t_f32);
574 ifn!("llvm.minnum.f64", fn(t_f64, t_f64) -> t_f64);
575 ifn!("llvm.maxnum.f32", fn(t_f32, t_f32) -> t_f32);
576 ifn!("llvm.maxnum.f64", fn(t_f64, t_f64) -> t_f64);
578 ifn!("llvm.floor.f32", fn(t_f32) -> t_f32);
579 ifn!("llvm.floor.f64", fn(t_f64) -> t_f64);
581 ifn!("llvm.ceil.f32", fn(t_f32) -> t_f32);
582 ifn!("llvm.ceil.f64", fn(t_f64) -> t_f64);
584 ifn!("llvm.trunc.f32", fn(t_f32) -> t_f32);
585 ifn!("llvm.trunc.f64", fn(t_f64) -> t_f64);
587 ifn!("llvm.copysign.f32", fn(t_f32, t_f32) -> t_f32);
588 ifn!("llvm.copysign.f64", fn(t_f64, t_f64) -> t_f64);
589 ifn!("llvm.round.f32", fn(t_f32) -> t_f32);
590 ifn!("llvm.round.f64", fn(t_f64) -> t_f64);
592 ifn!("llvm.rint.f32", fn(t_f32) -> t_f32);
593 ifn!("llvm.rint.f64", fn(t_f64) -> t_f64);
594 ifn!("llvm.nearbyint.f32", fn(t_f32) -> t_f32);
595 ifn!("llvm.nearbyint.f64", fn(t_f64) -> t_f64);
597 ifn!("llvm.ctpop.i8", fn(t_i8) -> t_i8);
598 ifn!("llvm.ctpop.i16", fn(t_i16) -> t_i16);
599 ifn!("llvm.ctpop.i32", fn(t_i32) -> t_i32);
600 ifn!("llvm.ctpop.i64", fn(t_i64) -> t_i64);
601 ifn!("llvm.ctpop.i128", fn(t_i128) -> t_i128);
603 ifn!("llvm.ctlz.i8", fn(t_i8, i1) -> t_i8);
604 ifn!("llvm.ctlz.i16", fn(t_i16, i1) -> t_i16);
605 ifn!("llvm.ctlz.i32", fn(t_i32, i1) -> t_i32);
606 ifn!("llvm.ctlz.i64", fn(t_i64, i1) -> t_i64);
607 ifn!("llvm.ctlz.i128", fn(t_i128, i1) -> t_i128);
609 ifn!("llvm.cttz.i8", fn(t_i8, i1) -> t_i8);
610 ifn!("llvm.cttz.i16", fn(t_i16, i1) -> t_i16);
611 ifn!("llvm.cttz.i32", fn(t_i32, i1) -> t_i32);
612 ifn!("llvm.cttz.i64", fn(t_i64, i1) -> t_i64);
613 ifn!("llvm.cttz.i128", fn(t_i128, i1) -> t_i128);
615 ifn!("llvm.bswap.i16", fn(t_i16) -> t_i16);
616 ifn!("llvm.bswap.i32", fn(t_i32) -> t_i32);
617 ifn!("llvm.bswap.i64", fn(t_i64) -> t_i64);
618 ifn!("llvm.bswap.i128", fn(t_i128) -> t_i128);
620 ifn!("llvm.bitreverse.i8", fn(t_i8) -> t_i8);
621 ifn!("llvm.bitreverse.i16", fn(t_i16) -> t_i16);
622 ifn!("llvm.bitreverse.i32", fn(t_i32) -> t_i32);
623 ifn!("llvm.bitreverse.i64", fn(t_i64) -> t_i64);
624 ifn!("llvm.bitreverse.i128", fn(t_i128) -> t_i128);
626 ifn!("llvm.fshl.i8", fn(t_i8, t_i8, t_i8) -> t_i8);
627 ifn!("llvm.fshl.i16", fn(t_i16, t_i16, t_i16) -> t_i16);
628 ifn!("llvm.fshl.i32", fn(t_i32, t_i32, t_i32) -> t_i32);
629 ifn!("llvm.fshl.i64", fn(t_i64, t_i64, t_i64) -> t_i64);
630 ifn!("llvm.fshl.i128", fn(t_i128, t_i128, t_i128) -> t_i128);
632 ifn!("llvm.fshr.i8", fn(t_i8, t_i8, t_i8) -> t_i8);
633 ifn!("llvm.fshr.i16", fn(t_i16, t_i16, t_i16) -> t_i16);
634 ifn!("llvm.fshr.i32", fn(t_i32, t_i32, t_i32) -> t_i32);
635 ifn!("llvm.fshr.i64", fn(t_i64, t_i64, t_i64) -> t_i64);
636 ifn!("llvm.fshr.i128", fn(t_i128, t_i128, t_i128) -> t_i128);
638 ifn!("llvm.sadd.with.overflow.i8", fn(t_i8, t_i8) -> mk_struct! {t_i8, i1});
639 ifn!("llvm.sadd.with.overflow.i16", fn(t_i16, t_i16) -> mk_struct! {t_i16, i1});
640 ifn!("llvm.sadd.with.overflow.i32", fn(t_i32, t_i32) -> mk_struct! {t_i32, i1});
641 ifn!("llvm.sadd.with.overflow.i64", fn(t_i64, t_i64) -> mk_struct! {t_i64, i1});
642 ifn!("llvm.sadd.with.overflow.i128", fn(t_i128, t_i128) -> mk_struct! {t_i128, i1});
644 ifn!("llvm.uadd.with.overflow.i8", fn(t_i8, t_i8) -> mk_struct! {t_i8, i1});
645 ifn!("llvm.uadd.with.overflow.i16", fn(t_i16, t_i16) -> mk_struct! {t_i16, i1});
646 ifn!("llvm.uadd.with.overflow.i32", fn(t_i32, t_i32) -> mk_struct! {t_i32, i1});
647 ifn!("llvm.uadd.with.overflow.i64", fn(t_i64, t_i64) -> mk_struct! {t_i64, i1});
648 ifn!("llvm.uadd.with.overflow.i128", fn(t_i128, t_i128) -> mk_struct! {t_i128, i1});
650 ifn!("llvm.ssub.with.overflow.i8", fn(t_i8, t_i8) -> mk_struct! {t_i8, i1});
651 ifn!("llvm.ssub.with.overflow.i16", fn(t_i16, t_i16) -> mk_struct! {t_i16, i1});
652 ifn!("llvm.ssub.with.overflow.i32", fn(t_i32, t_i32) -> mk_struct! {t_i32, i1});
653 ifn!("llvm.ssub.with.overflow.i64", fn(t_i64, t_i64) -> mk_struct! {t_i64, i1});
654 ifn!("llvm.ssub.with.overflow.i128", fn(t_i128, t_i128) -> mk_struct! {t_i128, i1});
656 ifn!("llvm.usub.with.overflow.i8", fn(t_i8, t_i8) -> mk_struct! {t_i8, i1});
657 ifn!("llvm.usub.with.overflow.i16", fn(t_i16, t_i16) -> mk_struct! {t_i16, i1});
658 ifn!("llvm.usub.with.overflow.i32", fn(t_i32, t_i32) -> mk_struct! {t_i32, i1});
659 ifn!("llvm.usub.with.overflow.i64", fn(t_i64, t_i64) -> mk_struct! {t_i64, i1});
660 ifn!("llvm.usub.with.overflow.i128", fn(t_i128, t_i128) -> mk_struct! {t_i128, i1});
662 ifn!("llvm.smul.with.overflow.i8", fn(t_i8, t_i8) -> mk_struct! {t_i8, i1});
663 ifn!("llvm.smul.with.overflow.i16", fn(t_i16, t_i16) -> mk_struct! {t_i16, i1});
664 ifn!("llvm.smul.with.overflow.i32", fn(t_i32, t_i32) -> mk_struct! {t_i32, i1});
665 ifn!("llvm.smul.with.overflow.i64", fn(t_i64, t_i64) -> mk_struct! {t_i64, i1});
666 ifn!("llvm.smul.with.overflow.i128", fn(t_i128, t_i128) -> mk_struct! {t_i128, i1});
668 ifn!("llvm.umul.with.overflow.i8", fn(t_i8, t_i8) -> mk_struct! {t_i8, i1});
669 ifn!("llvm.umul.with.overflow.i16", fn(t_i16, t_i16) -> mk_struct! {t_i16, i1});
670 ifn!("llvm.umul.with.overflow.i32", fn(t_i32, t_i32) -> mk_struct! {t_i32, i1});
671 ifn!("llvm.umul.with.overflow.i64", fn(t_i64, t_i64) -> mk_struct! {t_i64, i1});
672 ifn!("llvm.umul.with.overflow.i128", fn(t_i128, t_i128) -> mk_struct! {t_i128, i1});
674 ifn!("llvm.sadd.sat.i8", fn(t_i8, t_i8) -> t_i8);
675 ifn!("llvm.sadd.sat.i16", fn(t_i16, t_i16) -> t_i16);
676 ifn!("llvm.sadd.sat.i32", fn(t_i32, t_i32) -> t_i32);
677 ifn!("llvm.sadd.sat.i64", fn(t_i64, t_i64) -> t_i64);
678 ifn!("llvm.sadd.sat.i128", fn(t_i128, t_i128) -> t_i128);
680 ifn!("llvm.uadd.sat.i8", fn(t_i8, t_i8) -> t_i8);
681 ifn!("llvm.uadd.sat.i16", fn(t_i16, t_i16) -> t_i16);
682 ifn!("llvm.uadd.sat.i32", fn(t_i32, t_i32) -> t_i32);
683 ifn!("llvm.uadd.sat.i64", fn(t_i64, t_i64) -> t_i64);
684 ifn!("llvm.uadd.sat.i128", fn(t_i128, t_i128) -> t_i128);
686 ifn!("llvm.ssub.sat.i8", fn(t_i8, t_i8) -> t_i8);
687 ifn!("llvm.ssub.sat.i16", fn(t_i16, t_i16) -> t_i16);
688 ifn!("llvm.ssub.sat.i32", fn(t_i32, t_i32) -> t_i32);
689 ifn!("llvm.ssub.sat.i64", fn(t_i64, t_i64) -> t_i64);
690 ifn!("llvm.ssub.sat.i128", fn(t_i128, t_i128) -> t_i128);
692 ifn!("llvm.usub.sat.i8", fn(t_i8, t_i8) -> t_i8);
693 ifn!("llvm.usub.sat.i16", fn(t_i16, t_i16) -> t_i16);
694 ifn!("llvm.usub.sat.i32", fn(t_i32, t_i32) -> t_i32);
695 ifn!("llvm.usub.sat.i64", fn(t_i64, t_i64) -> t_i64);
696 ifn!("llvm.usub.sat.i128", fn(t_i128, t_i128) -> t_i128);
698 ifn!("llvm.lifetime.start.p0i8", fn(t_i64, i8p) -> void);
699 ifn!("llvm.lifetime.end.p0i8", fn(t_i64, i8p) -> void);
701 ifn!("llvm.expect.i1", fn(i1, i1) -> i1);
702 ifn!("llvm.eh.typeid.for", fn(i8p) -> t_i32);
703 ifn!("llvm.localescape", fn(...) -> void);
704 ifn!("llvm.localrecover", fn(i8p, i8p, t_i32) -> i8p);
705 ifn!("llvm.x86.seh.recoverfp", fn(i8p, i8p) -> i8p);
707 ifn!("llvm.assume", fn(i1) -> void);
708 ifn!("llvm.prefetch", fn(i8p, t_i32, t_i32, t_i32) -> void);
710 // variadic intrinsics
711 ifn!("llvm.va_start", fn(i8p) -> void);
712 ifn!("llvm.va_end", fn(i8p) -> void);
713 ifn!("llvm.va_copy", fn(i8p, i8p) -> void);
715 if self.sess().opts.debugging_opts.instrument_coverage {
716 ifn!("llvm.instrprof.increment", fn(i8p, t_i64, t_i32, t_i32) -> void);
719 if self.sess().opts.debuginfo != DebugInfo::None {
720 ifn!("llvm.dbg.declare", fn(self.type_metadata(), self.type_metadata()) -> void);
721 ifn!("llvm.dbg.value", fn(self.type_metadata(), t_i64, self.type_metadata()) -> void);
726 crate fn eh_catch_typeinfo(&self) -> &'b Value {
727 if let Some(eh_catch_typeinfo) = self.eh_catch_typeinfo.get() {
728 return eh_catch_typeinfo;
731 assert!(self.sess().target.is_like_emscripten);
732 let eh_catch_typeinfo = match tcx.lang_items().eh_catch_typeinfo() {
733 Some(def_id) => self.get_static(def_id),
736 .type_struct(&[self.type_ptr_to(self.type_isize()), self.type_i8p()], false);
737 self.declare_global("rust_eh_catch_typeinfo", ty)
740 let eh_catch_typeinfo = self.const_bitcast(eh_catch_typeinfo, self.type_i8p());
741 self.eh_catch_typeinfo.set(Some(eh_catch_typeinfo));
746 impl<'b, 'tcx> CodegenCx<'b, 'tcx> {
747 /// Generates a new symbol name with the given prefix. This symbol name must
748 /// only be used for definitions with `internal` or `private` linkage.
749 pub fn generate_local_symbol_name(&self, prefix: &str) -> String {
750 let idx = self.local_gen_sym_counter.get();
751 self.local_gen_sym_counter.set(idx + 1);
752 // Include a '.' character, so there can be no accidental conflicts with
753 // user defined names
754 let mut name = String::with_capacity(prefix.len() + 6);
755 name.push_str(prefix);
757 base_n::push_str(idx as u128, base_n::ALPHANUMERIC_ONLY, &mut name);
762 impl HasDataLayout for CodegenCx<'ll, 'tcx> {
763 fn data_layout(&self) -> &TargetDataLayout {
764 &self.tcx.data_layout
768 impl HasTargetSpec for CodegenCx<'ll, 'tcx> {
769 fn target_spec(&self) -> &Target {
770 &self.tcx.sess.target
774 impl ty::layout::HasTyCtxt<'tcx> for CodegenCx<'ll, 'tcx> {
775 fn tcx(&self) -> TyCtxt<'tcx> {
780 impl LayoutOf for CodegenCx<'ll, 'tcx> {
782 type TyAndLayout = TyAndLayout<'tcx>;
784 fn layout_of(&self, ty: Ty<'tcx>) -> Self::TyAndLayout {
785 self.spanned_layout_of(ty, DUMMY_SP)
788 fn spanned_layout_of(&self, ty: Ty<'tcx>, span: Span) -> Self::TyAndLayout {
789 self.tcx.layout_of(ty::ParamEnv::reveal_all().and(ty)).unwrap_or_else(|e| {
790 if let LayoutError::SizeOverflow(_) = e {
791 self.sess().span_fatal(span, &e.to_string())
793 bug!("failed to get layout for `{}`: {}", ty, e)
799 impl<'tcx, 'll> HasParamEnv<'tcx> for CodegenCx<'ll, 'tcx> {
800 fn param_env(&self) -> ty::ParamEnv<'tcx> {
801 ty::ParamEnv::reveal_all()