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 <https://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
<'ll
, '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_powerpc64_vectors(data_layout
: String
) -> String
{
105 data_layout
.replace("-v256:256:256-v512:512:512", "")
108 pub unsafe fn create_module(
110 llcx
: &'ll llvm
::Context
,
112 ) -> &'ll llvm
::Module
{
114 let mod_name
= SmallCStr
::new(mod_name
);
115 let llmod
= llvm
::LLVMModuleCreateWithNameInContext(mod_name
.as_ptr(), llcx
);
117 let mut target_data_layout
= sess
.target
.data_layout
.clone();
118 if llvm_util
::get_version() < (12, 0, 0) && sess
.target
.arch
== "powerpc64" {
119 target_data_layout
= strip_powerpc64_vectors(target_data_layout
);
122 // Ensure the data-layout values hardcoded remain the defaults.
123 if sess
.target
.is_builtin
{
124 let tm
= crate::back
::write
::create_informational_target_machine(tcx
.sess
);
125 llvm
::LLVMRustSetDataLayoutFromTargetMachine(llmod
, tm
);
126 llvm
::LLVMRustDisposeTargetMachine(tm
);
128 let llvm_data_layout
= llvm
::LLVMGetDataLayoutStr(llmod
);
129 let llvm_data_layout
= str::from_utf8(CStr
::from_ptr(llvm_data_layout
).to_bytes())
130 .expect("got a non-UTF8 data-layout from LLVM");
132 // Unfortunately LLVM target specs change over time, and right now we
133 // don't have proper support to work with any more than one
134 // `data_layout` than the one that is in the rust-lang/rust repo. If
135 // this compiler is configured against a custom LLVM, we may have a
136 // differing data layout, even though we should update our own to use
139 // As an interim hack, if CFG_LLVM_ROOT is not an empty string then we
140 // disable this check entirely as we may be configured with something
141 // that has a different target layout.
143 // Unsure if this will actually cause breakage when rustc is configured
147 let cfg_llvm_root
= option_env
!("CFG_LLVM_ROOT").unwrap_or("");
148 let custom_llvm_used
= cfg_llvm_root
.trim() != "";
150 if !custom_llvm_used
&& target_data_layout
!= llvm_data_layout
{
152 "data-layout for target `{rustc_target}`, `{rustc_layout}`, \
153 differs from LLVM target's `{llvm_target}` default layout, `{llvm_layout}`",
154 rustc_target
= sess
.opts
.target_triple
,
155 rustc_layout
= target_data_layout
,
156 llvm_target
= sess
.target
.llvm_target
,
157 llvm_layout
= llvm_data_layout
162 let data_layout
= SmallCStr
::new(&target_data_layout
);
163 llvm
::LLVMSetDataLayout(llmod
, data_layout
.as_ptr());
165 let llvm_target
= SmallCStr
::new(&sess
.target
.llvm_target
);
166 llvm
::LLVMRustSetNormalizedTarget(llmod
, llvm_target
.as_ptr());
168 if sess
.relocation_model() == RelocModel
::Pic
{
169 llvm
::LLVMRustSetModulePICLevel(llmod
);
170 // PIE is potentially more effective than PIC, but can only be used in executables.
171 // If all our outputs are executables, then we can relax PIC to PIE.
172 if sess
.crate_types().iter().all(|ty
| *ty
== CrateType
::Executable
) {
173 llvm
::LLVMRustSetModulePIELevel(llmod
);
177 // Linking object files with different code models is undefined behavior
178 // because the compiler would have to generate additional code (to span
179 // longer jumps) if a larger code model is used with a smaller one.
181 // See https://reviews.llvm.org/D52322 and https://reviews.llvm.org/D52323.
182 llvm
::LLVMRustSetModuleCodeModel(llmod
, to_llvm_code_model(sess
.code_model()));
184 // If skipping the PLT is enabled, we need to add some module metadata
185 // to ensure intrinsic calls don't use it.
186 if !sess
.needs_plt() {
187 let avoid_plt
= "RtLibUseGOT\0".as_ptr().cast();
188 llvm
::LLVMRustAddModuleFlag(llmod
, avoid_plt
, 1);
191 // Control Flow Guard is currently only supported by the MSVC linker on Windows.
192 if sess
.target
.is_like_msvc
{
193 match sess
.opts
.cg
.control_flow_guard
{
194 CFGuard
::Disabled
=> {}
195 CFGuard
::NoChecks
=> {
196 // Set `cfguard=1` module flag to emit metadata only.
197 llvm
::LLVMRustAddModuleFlag(llmod
, "cfguard\0".as_ptr() as *const _
, 1)
200 // Set `cfguard=2` module flag to emit metadata and checks.
201 llvm
::LLVMRustAddModuleFlag(llmod
, "cfguard\0".as_ptr() as *const _
, 2)
209 impl<'ll
, 'tcx
> CodegenCx
<'ll
, 'tcx
> {
212 codegen_unit
: &'tcx CodegenUnit
<'tcx
>,
213 llvm_module
: &'ll
crate::ModuleLlvm
,
215 // An interesting part of Windows which MSVC forces our hand on (and
216 // apparently MinGW didn't) is the usage of `dllimport` and `dllexport`
217 // attributes in LLVM IR as well as native dependencies (in C these
218 // correspond to `__declspec(dllimport)`).
220 // LD (BFD) in MinGW mode can often correctly guess `dllexport` but
221 // relying on that can result in issues like #50176.
222 // LLD won't support that and expects symbols with proper attributes.
223 // Because of that we make MinGW target emit dllexport just like MSVC.
224 // When it comes to dllimport we use it for constants but for functions
225 // rely on the linker to do the right thing. Opposed to dllexport this
226 // task is easy for them (both LD and LLD) and allows us to easily use
227 // symbols from static libraries in shared libraries.
229 // Whenever a dynamic library is built on Windows it must have its public
230 // interface specified by functions tagged with `dllexport` or otherwise
231 // they're not available to be linked against. This poses a few problems
232 // for the compiler, some of which are somewhat fundamental, but we use
233 // the `use_dll_storage_attrs` variable below to attach the `dllexport`
234 // attribute to all LLVM functions that are exported e.g., they're
235 // already tagged with external linkage). This is suboptimal for a few
238 // * If an object file will never be included in a dynamic library,
239 // there's no need to attach the dllexport attribute. Most object
240 // files in Rust are not destined to become part of a dll as binaries
241 // are statically linked by default.
242 // * If the compiler is emitting both an rlib and a dylib, the same
243 // source object file is currently used but with MSVC this may be less
244 // feasible. The compiler may be able to get around this, but it may
245 // involve some invasive changes to deal with this.
247 // The flipside of this situation is that whenever you link to a dll and
248 // you import a function from it, the import should be tagged with
249 // `dllimport`. At this time, however, the compiler does not emit
250 // `dllimport` for any declarations other than constants (where it is
251 // required), which is again suboptimal for even more reasons!
253 // * Calling a function imported from another dll without using
254 // `dllimport` causes the linker/compiler to have extra overhead (one
255 // `jmp` instruction on x86) when calling the function.
256 // * The same object file may be used in different circumstances, so a
257 // function may be imported from a dll if the object is linked into a
258 // dll, but it may be just linked against if linked into an rlib.
259 // * The compiler has no knowledge about whether native functions should
260 // be tagged dllimport or not.
262 // For now the compiler takes the perf hit (I do not have any numbers to
263 // this effect) by marking very little as `dllimport` and praying the
264 // linker will take care of everything. Fixing this problem will likely
265 // require adding a few attributes to Rust itself (feature gated at the
266 // start) and then strongly recommending static linkage on Windows!
267 let use_dll_storage_attrs
= tcx
.sess
.target
.is_like_windows
;
269 let check_overflow
= tcx
.sess
.overflow_checks();
271 let tls_model
= to_llvm_tls_model(tcx
.sess
.tls_model());
273 let (llcx
, llmod
) = (&*llvm_module
.llcx
, llvm_module
.llmod());
275 let coverage_cx
= if tcx
.sess
.instrument_coverage() {
276 let covctx
= coverageinfo
::CrateCoverageContext
::new();
282 let dbg_cx
= if tcx
.sess
.opts
.debuginfo
!= DebugInfo
::None
{
283 let dctx
= debuginfo
::CrateDebugContext
::new(llmod
);
284 debuginfo
::metadata
::compile_unit_metadata(tcx
, &codegen_unit
.name().as_str(), &dctx
);
290 let isize_ty
= Type
::ix_llcx(llcx
, tcx
.data_layout
.pointer_size
.bits());
295 use_dll_storage_attrs
,
300 instances
: Default
::default(),
301 vtables
: Default
::default(),
302 const_cstr_cache
: Default
::default(),
303 const_unsized
: Default
::default(),
304 const_globals
: Default
::default(),
305 statics_to_rauw
: RefCell
::new(Vec
::new()),
306 used_statics
: RefCell
::new(Vec
::new()),
307 lltypes
: Default
::default(),
308 scalar_lltypes
: Default
::default(),
309 pointee_infos
: Default
::default(),
313 eh_personality
: Cell
::new(None
),
314 eh_catch_typeinfo
: Cell
::new(None
),
315 rust_try_fn
: Cell
::new(None
),
316 intrinsics
: Default
::default(),
317 local_gen_sym_counter
: Cell
::new(0),
321 crate fn statics_to_rauw(&self) -> &RefCell
<Vec
<(&'ll Value
, &'ll Value
)>> {
322 &self.statics_to_rauw
326 pub fn coverage_context(&'a
self) -> Option
<&'a coverageinfo
::CrateCoverageContext
<'ll
, 'tcx
>> {
327 self.coverage_cx
.as_ref()
331 impl MiscMethods
<'tcx
> for CodegenCx
<'ll
, 'tcx
> {
334 ) -> &RefCell
<FxHashMap
<(Ty
<'tcx
>, Option
<ty
::PolyExistentialTraitRef
<'tcx
>>), &'ll Value
>>
339 fn get_fn(&self, instance
: Instance
<'tcx
>) -> &'ll Value
{
340 get_fn(self, instance
)
343 fn get_fn_addr(&self, instance
: Instance
<'tcx
>) -> &'ll Value
{
344 get_fn(self, instance
)
347 fn eh_personality(&self) -> &'ll Value
{
348 // The exception handling personality function.
350 // If our compilation unit has the `eh_personality` lang item somewhere
351 // within it, then we just need to codegen that. Otherwise, we're
352 // building an rlib which will depend on some upstream implementation of
353 // this function, so we just codegen a generic reference to it. We don't
354 // specify any of the types for the function, we just make it a symbol
355 // that LLVM can later use.
357 // Note that MSVC is a little special here in that we don't use the
358 // `eh_personality` lang item at all. Currently LLVM has support for
359 // both Dwarf and SEH unwind mechanisms for MSVC targets and uses the
360 // *name of the personality function* to decide what kind of unwind side
361 // tables/landing pads to emit. It looks like Dwarf is used by default,
362 // injecting a dependency on the `_Unwind_Resume` symbol for resuming
363 // an "exception", but for MSVC we want to force SEH. This means that we
364 // can't actually have the personality function be our standard
365 // `rust_eh_personality` function, but rather we wired it up to the
366 // CRT's custom personality function, which forces LLVM to consider
367 // landing pads as "landing pads for SEH".
368 if let Some(llpersonality
) = self.eh_personality
.get() {
369 return llpersonality
;
372 let llfn
= match tcx
.lang_items().eh_personality() {
373 Some(def_id
) if !wants_msvc_seh(self.sess()) => self.get_fn_addr(
374 ty
::Instance
::resolve(
376 ty
::ParamEnv
::reveal_all(),
378 tcx
.intern_substs(&[]),
384 let name
= if wants_msvc_seh(self.sess()) {
387 "rust_eh_personality"
389 if let Some(llfn
) = self.get_declared_value(name
) {
392 let fty
= self.type_variadic_func(&[], self.type_i32());
393 let llfn
= self.declare_cfn(name
, llvm
::UnnamedAddr
::Global
, fty
);
394 attributes
::apply_target_cpu_attr(self, llfn
);
399 self.eh_personality
.set(Some(llfn
));
403 fn sess(&self) -> &Session
{
407 fn check_overflow(&self) -> bool
{
411 fn codegen_unit(&self) -> &'tcx CodegenUnit
<'tcx
> {
415 fn used_statics(&self) -> &RefCell
<Vec
<&'ll Value
>> {
419 fn set_frame_pointer_type(&self, llfn
: &'ll Value
) {
420 attributes
::set_frame_pointer_type(self, llfn
)
423 fn apply_target_cpu_attr(&self, llfn
: &'ll Value
) {
424 attributes
::apply_target_cpu_attr(self, llfn
);
425 attributes
::apply_tune_cpu_attr(self, llfn
);
428 fn create_used_variable(&self) {
429 let name
= cstr
!("llvm.used");
430 let section
= cstr
!("llvm.metadata");
432 self.const_array(&self.type_ptr_to(self.type_i8()), &*self.used_statics
.borrow());
435 let g
= llvm
::LLVMAddGlobal(self.llmod
, self.val_ty(array
), name
.as_ptr());
436 llvm
::LLVMSetInitializer(g
, array
);
437 llvm
::LLVMRustSetLinkage(g
, llvm
::Linkage
::AppendingLinkage
);
438 llvm
::LLVMSetSection(g
, section
.as_ptr());
442 fn declare_c_main(&self, fn_type
: Self::Type
) -> Option
<Self::Function
> {
443 if self.get_declared_value("main").is_none() {
444 Some(self.declare_cfn("main", llvm
::UnnamedAddr
::Global
, fn_type
))
446 // If the symbol already exists, it is an error: for example, the user wrote
447 // #[no_mangle] extern "C" fn main(..) {..}
448 // instead of #[start]
454 impl CodegenCx
<'b
, 'tcx
> {
455 crate fn get_intrinsic(&self, key
: &str) -> &'b Value
{
456 if let Some(v
) = self.intrinsics
.borrow().get(key
).cloned() {
460 self.declare_intrinsic(key
).unwrap_or_else(|| bug
!("unknown intrinsic '{}'", key
))
466 args
: Option
<&[&'b llvm
::Type
]>,
468 ) -> &'b llvm
::Value
{
469 let fn_ty
= if let Some(args
) = args
{
470 self.type_func(args
, ret
)
472 self.type_variadic_func(&[], ret
)
474 let f
= self.declare_cfn(name
, llvm
::UnnamedAddr
::No
, fn_ty
);
475 self.intrinsics
.borrow_mut().insert(name
, f
);
479 fn declare_intrinsic(&self, key
: &str) -> Option
<&'b Value
> {
481 ($name
:expr
, fn() -> $ret
:expr
) => (
483 return Some(self.insert_intrinsic($name
, Some(&[]), $ret
));
486 ($name
:expr
, fn(...) -> $ret
:expr
) => (
488 return Some(self.insert_intrinsic($name
, None
, $ret
));
491 ($name
:expr
, fn($
($arg
:expr
),*) -> $ret
:expr
) => (
493 return Some(self.insert_intrinsic($name
, Some(&[$
($arg
),*]), $ret
));
497 macro_rules
! mk_struct
{
498 ($
($field_ty
:expr
),*) => (self.type_struct( &[$
($field_ty
),*], false))
501 let i8p
= self.type_i8p();
502 let void
= self.type_void();
503 let i1
= self.type_i1();
504 let t_i8
= self.type_i8();
505 let t_i16
= self.type_i16();
506 let t_i32
= self.type_i32();
507 let t_i64
= self.type_i64();
508 let t_i128
= self.type_i128();
509 let t_isize
= self.type_isize();
510 let t_f32
= self.type_f32();
511 let t_f64
= self.type_f64();
513 ifn
!("llvm.wasm.trunc.unsigned.i32.f32", fn(t_f32
) -> t_i32
);
514 ifn
!("llvm.wasm.trunc.unsigned.i32.f64", fn(t_f64
) -> t_i32
);
515 ifn
!("llvm.wasm.trunc.unsigned.i64.f32", fn(t_f32
) -> t_i64
);
516 ifn
!("llvm.wasm.trunc.unsigned.i64.f64", fn(t_f64
) -> t_i64
);
517 ifn
!("llvm.wasm.trunc.signed.i32.f32", fn(t_f32
) -> t_i32
);
518 ifn
!("llvm.wasm.trunc.signed.i32.f64", fn(t_f64
) -> t_i32
);
519 ifn
!("llvm.wasm.trunc.signed.i64.f32", fn(t_f32
) -> t_i64
);
520 ifn
!("llvm.wasm.trunc.signed.i64.f64", fn(t_f64
) -> t_i64
);
522 ifn
!("llvm.fptosi.sat.i8.f32", fn(t_f32
) -> t_i8
);
523 ifn
!("llvm.fptosi.sat.i16.f32", fn(t_f32
) -> t_i16
);
524 ifn
!("llvm.fptosi.sat.i32.f32", fn(t_f32
) -> t_i32
);
525 ifn
!("llvm.fptosi.sat.i64.f32", fn(t_f32
) -> t_i64
);
526 ifn
!("llvm.fptosi.sat.i128.f32", fn(t_f32
) -> t_i128
);
527 ifn
!("llvm.fptosi.sat.i8.f64", fn(t_f64
) -> t_i8
);
528 ifn
!("llvm.fptosi.sat.i16.f64", fn(t_f64
) -> t_i16
);
529 ifn
!("llvm.fptosi.sat.i32.f64", fn(t_f64
) -> t_i32
);
530 ifn
!("llvm.fptosi.sat.i64.f64", fn(t_f64
) -> t_i64
);
531 ifn
!("llvm.fptosi.sat.i128.f64", fn(t_f64
) -> t_i128
);
533 ifn
!("llvm.fptoui.sat.i8.f32", fn(t_f32
) -> t_i8
);
534 ifn
!("llvm.fptoui.sat.i16.f32", fn(t_f32
) -> t_i16
);
535 ifn
!("llvm.fptoui.sat.i32.f32", fn(t_f32
) -> t_i32
);
536 ifn
!("llvm.fptoui.sat.i64.f32", fn(t_f32
) -> t_i64
);
537 ifn
!("llvm.fptoui.sat.i128.f32", fn(t_f32
) -> t_i128
);
538 ifn
!("llvm.fptoui.sat.i8.f64", fn(t_f64
) -> t_i8
);
539 ifn
!("llvm.fptoui.sat.i16.f64", fn(t_f64
) -> t_i16
);
540 ifn
!("llvm.fptoui.sat.i32.f64", fn(t_f64
) -> t_i32
);
541 ifn
!("llvm.fptoui.sat.i64.f64", fn(t_f64
) -> t_i64
);
542 ifn
!("llvm.fptoui.sat.i128.f64", fn(t_f64
) -> t_i128
);
544 ifn
!("llvm.trap", fn() -> void
);
545 ifn
!("llvm.debugtrap", fn() -> void
);
546 ifn
!("llvm.frameaddress", fn(t_i32
) -> i8p
);
547 ifn
!("llvm.sideeffect", fn() -> void
);
549 ifn
!("llvm.powi.f32", fn(t_f32
, t_i32
) -> t_f32
);
550 ifn
!("llvm.powi.f64", fn(t_f64
, t_i32
) -> t_f64
);
552 ifn
!("llvm.pow.f32", fn(t_f32
, t_f32
) -> t_f32
);
553 ifn
!("llvm.pow.f64", fn(t_f64
, t_f64
) -> t_f64
);
555 ifn
!("llvm.sqrt.f32", fn(t_f32
) -> t_f32
);
556 ifn
!("llvm.sqrt.f64", fn(t_f64
) -> t_f64
);
558 ifn
!("llvm.sin.f32", fn(t_f32
) -> t_f32
);
559 ifn
!("llvm.sin.f64", fn(t_f64
) -> t_f64
);
561 ifn
!("llvm.cos.f32", fn(t_f32
) -> t_f32
);
562 ifn
!("llvm.cos.f64", fn(t_f64
) -> t_f64
);
564 ifn
!("llvm.exp.f32", fn(t_f32
) -> t_f32
);
565 ifn
!("llvm.exp.f64", fn(t_f64
) -> t_f64
);
567 ifn
!("llvm.exp2.f32", fn(t_f32
) -> t_f32
);
568 ifn
!("llvm.exp2.f64", fn(t_f64
) -> t_f64
);
570 ifn
!("llvm.log.f32", fn(t_f32
) -> t_f32
);
571 ifn
!("llvm.log.f64", fn(t_f64
) -> t_f64
);
573 ifn
!("llvm.log10.f32", fn(t_f32
) -> t_f32
);
574 ifn
!("llvm.log10.f64", fn(t_f64
) -> t_f64
);
576 ifn
!("llvm.log2.f32", fn(t_f32
) -> t_f32
);
577 ifn
!("llvm.log2.f64", fn(t_f64
) -> t_f64
);
579 ifn
!("llvm.fma.f32", fn(t_f32
, t_f32
, t_f32
) -> t_f32
);
580 ifn
!("llvm.fma.f64", fn(t_f64
, t_f64
, t_f64
) -> t_f64
);
582 ifn
!("llvm.fabs.f32", fn(t_f32
) -> t_f32
);
583 ifn
!("llvm.fabs.f64", fn(t_f64
) -> t_f64
);
585 ifn
!("llvm.minnum.f32", fn(t_f32
, t_f32
) -> t_f32
);
586 ifn
!("llvm.minnum.f64", fn(t_f64
, t_f64
) -> t_f64
);
587 ifn
!("llvm.maxnum.f32", fn(t_f32
, t_f32
) -> t_f32
);
588 ifn
!("llvm.maxnum.f64", fn(t_f64
, t_f64
) -> t_f64
);
590 ifn
!("llvm.floor.f32", fn(t_f32
) -> t_f32
);
591 ifn
!("llvm.floor.f64", fn(t_f64
) -> t_f64
);
593 ifn
!("llvm.ceil.f32", fn(t_f32
) -> t_f32
);
594 ifn
!("llvm.ceil.f64", fn(t_f64
) -> t_f64
);
596 ifn
!("llvm.trunc.f32", fn(t_f32
) -> t_f32
);
597 ifn
!("llvm.trunc.f64", fn(t_f64
) -> t_f64
);
599 ifn
!("llvm.copysign.f32", fn(t_f32
, t_f32
) -> t_f32
);
600 ifn
!("llvm.copysign.f64", fn(t_f64
, t_f64
) -> t_f64
);
601 ifn
!("llvm.round.f32", fn(t_f32
) -> t_f32
);
602 ifn
!("llvm.round.f64", fn(t_f64
) -> t_f64
);
604 ifn
!("llvm.rint.f32", fn(t_f32
) -> t_f32
);
605 ifn
!("llvm.rint.f64", fn(t_f64
) -> t_f64
);
606 ifn
!("llvm.nearbyint.f32", fn(t_f32
) -> t_f32
);
607 ifn
!("llvm.nearbyint.f64", fn(t_f64
) -> t_f64
);
609 ifn
!("llvm.ctpop.i8", fn(t_i8
) -> t_i8
);
610 ifn
!("llvm.ctpop.i16", fn(t_i16
) -> t_i16
);
611 ifn
!("llvm.ctpop.i32", fn(t_i32
) -> t_i32
);
612 ifn
!("llvm.ctpop.i64", fn(t_i64
) -> t_i64
);
613 ifn
!("llvm.ctpop.i128", fn(t_i128
) -> t_i128
);
615 ifn
!("llvm.ctlz.i8", fn(t_i8
, i1
) -> t_i8
);
616 ifn
!("llvm.ctlz.i16", fn(t_i16
, i1
) -> t_i16
);
617 ifn
!("llvm.ctlz.i32", fn(t_i32
, i1
) -> t_i32
);
618 ifn
!("llvm.ctlz.i64", fn(t_i64
, i1
) -> t_i64
);
619 ifn
!("llvm.ctlz.i128", fn(t_i128
, i1
) -> t_i128
);
621 ifn
!("llvm.cttz.i8", fn(t_i8
, i1
) -> t_i8
);
622 ifn
!("llvm.cttz.i16", fn(t_i16
, i1
) -> t_i16
);
623 ifn
!("llvm.cttz.i32", fn(t_i32
, i1
) -> t_i32
);
624 ifn
!("llvm.cttz.i64", fn(t_i64
, i1
) -> t_i64
);
625 ifn
!("llvm.cttz.i128", fn(t_i128
, i1
) -> t_i128
);
627 ifn
!("llvm.bswap.i16", fn(t_i16
) -> t_i16
);
628 ifn
!("llvm.bswap.i32", fn(t_i32
) -> t_i32
);
629 ifn
!("llvm.bswap.i64", fn(t_i64
) -> t_i64
);
630 ifn
!("llvm.bswap.i128", fn(t_i128
) -> t_i128
);
632 ifn
!("llvm.bitreverse.i8", fn(t_i8
) -> t_i8
);
633 ifn
!("llvm.bitreverse.i16", fn(t_i16
) -> t_i16
);
634 ifn
!("llvm.bitreverse.i32", fn(t_i32
) -> t_i32
);
635 ifn
!("llvm.bitreverse.i64", fn(t_i64
) -> t_i64
);
636 ifn
!("llvm.bitreverse.i128", fn(t_i128
) -> t_i128
);
638 ifn
!("llvm.fshl.i8", fn(t_i8
, t_i8
, t_i8
) -> t_i8
);
639 ifn
!("llvm.fshl.i16", fn(t_i16
, t_i16
, t_i16
) -> t_i16
);
640 ifn
!("llvm.fshl.i32", fn(t_i32
, t_i32
, t_i32
) -> t_i32
);
641 ifn
!("llvm.fshl.i64", fn(t_i64
, t_i64
, t_i64
) -> t_i64
);
642 ifn
!("llvm.fshl.i128", fn(t_i128
, t_i128
, t_i128
) -> t_i128
);
644 ifn
!("llvm.fshr.i8", fn(t_i8
, t_i8
, t_i8
) -> t_i8
);
645 ifn
!("llvm.fshr.i16", fn(t_i16
, t_i16
, t_i16
) -> t_i16
);
646 ifn
!("llvm.fshr.i32", fn(t_i32
, t_i32
, t_i32
) -> t_i32
);
647 ifn
!("llvm.fshr.i64", fn(t_i64
, t_i64
, t_i64
) -> t_i64
);
648 ifn
!("llvm.fshr.i128", fn(t_i128
, t_i128
, t_i128
) -> t_i128
);
650 ifn
!("llvm.sadd.with.overflow.i8", fn(t_i8
, t_i8
) -> mk_struct
! {t_i8, i1}
);
651 ifn
!("llvm.sadd.with.overflow.i16", fn(t_i16
, t_i16
) -> mk_struct
! {t_i16, i1}
);
652 ifn
!("llvm.sadd.with.overflow.i32", fn(t_i32
, t_i32
) -> mk_struct
! {t_i32, i1}
);
653 ifn
!("llvm.sadd.with.overflow.i64", fn(t_i64
, t_i64
) -> mk_struct
! {t_i64, i1}
);
654 ifn
!("llvm.sadd.with.overflow.i128", fn(t_i128
, t_i128
) -> mk_struct
! {t_i128, i1}
);
656 ifn
!("llvm.uadd.with.overflow.i8", fn(t_i8
, t_i8
) -> mk_struct
! {t_i8, i1}
);
657 ifn
!("llvm.uadd.with.overflow.i16", fn(t_i16
, t_i16
) -> mk_struct
! {t_i16, i1}
);
658 ifn
!("llvm.uadd.with.overflow.i32", fn(t_i32
, t_i32
) -> mk_struct
! {t_i32, i1}
);
659 ifn
!("llvm.uadd.with.overflow.i64", fn(t_i64
, t_i64
) -> mk_struct
! {t_i64, i1}
);
660 ifn
!("llvm.uadd.with.overflow.i128", fn(t_i128
, t_i128
) -> mk_struct
! {t_i128, i1}
);
662 ifn
!("llvm.ssub.with.overflow.i8", fn(t_i8
, t_i8
) -> mk_struct
! {t_i8, i1}
);
663 ifn
!("llvm.ssub.with.overflow.i16", fn(t_i16
, t_i16
) -> mk_struct
! {t_i16, i1}
);
664 ifn
!("llvm.ssub.with.overflow.i32", fn(t_i32
, t_i32
) -> mk_struct
! {t_i32, i1}
);
665 ifn
!("llvm.ssub.with.overflow.i64", fn(t_i64
, t_i64
) -> mk_struct
! {t_i64, i1}
);
666 ifn
!("llvm.ssub.with.overflow.i128", fn(t_i128
, t_i128
) -> mk_struct
! {t_i128, i1}
);
668 ifn
!("llvm.usub.with.overflow.i8", fn(t_i8
, t_i8
) -> mk_struct
! {t_i8, i1}
);
669 ifn
!("llvm.usub.with.overflow.i16", fn(t_i16
, t_i16
) -> mk_struct
! {t_i16, i1}
);
670 ifn
!("llvm.usub.with.overflow.i32", fn(t_i32
, t_i32
) -> mk_struct
! {t_i32, i1}
);
671 ifn
!("llvm.usub.with.overflow.i64", fn(t_i64
, t_i64
) -> mk_struct
! {t_i64, i1}
);
672 ifn
!("llvm.usub.with.overflow.i128", fn(t_i128
, t_i128
) -> mk_struct
! {t_i128, i1}
);
674 ifn
!("llvm.smul.with.overflow.i8", fn(t_i8
, t_i8
) -> mk_struct
! {t_i8, i1}
);
675 ifn
!("llvm.smul.with.overflow.i16", fn(t_i16
, t_i16
) -> mk_struct
! {t_i16, i1}
);
676 ifn
!("llvm.smul.with.overflow.i32", fn(t_i32
, t_i32
) -> mk_struct
! {t_i32, i1}
);
677 ifn
!("llvm.smul.with.overflow.i64", fn(t_i64
, t_i64
) -> mk_struct
! {t_i64, i1}
);
678 ifn
!("llvm.smul.with.overflow.i128", fn(t_i128
, t_i128
) -> mk_struct
! {t_i128, i1}
);
680 ifn
!("llvm.umul.with.overflow.i8", fn(t_i8
, t_i8
) -> mk_struct
! {t_i8, i1}
);
681 ifn
!("llvm.umul.with.overflow.i16", fn(t_i16
, t_i16
) -> mk_struct
! {t_i16, i1}
);
682 ifn
!("llvm.umul.with.overflow.i32", fn(t_i32
, t_i32
) -> mk_struct
! {t_i32, i1}
);
683 ifn
!("llvm.umul.with.overflow.i64", fn(t_i64
, t_i64
) -> mk_struct
! {t_i64, i1}
);
684 ifn
!("llvm.umul.with.overflow.i128", fn(t_i128
, t_i128
) -> mk_struct
! {t_i128, i1}
);
686 ifn
!("llvm.sadd.sat.i8", fn(t_i8
, t_i8
) -> t_i8
);
687 ifn
!("llvm.sadd.sat.i16", fn(t_i16
, t_i16
) -> t_i16
);
688 ifn
!("llvm.sadd.sat.i32", fn(t_i32
, t_i32
) -> t_i32
);
689 ifn
!("llvm.sadd.sat.i64", fn(t_i64
, t_i64
) -> t_i64
);
690 ifn
!("llvm.sadd.sat.i128", fn(t_i128
, t_i128
) -> t_i128
);
692 ifn
!("llvm.uadd.sat.i8", fn(t_i8
, t_i8
) -> t_i8
);
693 ifn
!("llvm.uadd.sat.i16", fn(t_i16
, t_i16
) -> t_i16
);
694 ifn
!("llvm.uadd.sat.i32", fn(t_i32
, t_i32
) -> t_i32
);
695 ifn
!("llvm.uadd.sat.i64", fn(t_i64
, t_i64
) -> t_i64
);
696 ifn
!("llvm.uadd.sat.i128", fn(t_i128
, t_i128
) -> t_i128
);
698 ifn
!("llvm.ssub.sat.i8", fn(t_i8
, t_i8
) -> t_i8
);
699 ifn
!("llvm.ssub.sat.i16", fn(t_i16
, t_i16
) -> t_i16
);
700 ifn
!("llvm.ssub.sat.i32", fn(t_i32
, t_i32
) -> t_i32
);
701 ifn
!("llvm.ssub.sat.i64", fn(t_i64
, t_i64
) -> t_i64
);
702 ifn
!("llvm.ssub.sat.i128", fn(t_i128
, t_i128
) -> t_i128
);
704 ifn
!("llvm.usub.sat.i8", fn(t_i8
, t_i8
) -> t_i8
);
705 ifn
!("llvm.usub.sat.i16", fn(t_i16
, t_i16
) -> t_i16
);
706 ifn
!("llvm.usub.sat.i32", fn(t_i32
, t_i32
) -> t_i32
);
707 ifn
!("llvm.usub.sat.i64", fn(t_i64
, t_i64
) -> t_i64
);
708 ifn
!("llvm.usub.sat.i128", fn(t_i128
, t_i128
) -> t_i128
);
710 ifn
!("llvm.lifetime.start.p0i8", fn(t_i64
, i8p
) -> void
);
711 ifn
!("llvm.lifetime.end.p0i8", fn(t_i64
, i8p
) -> void
);
713 ifn
!("llvm.expect.i1", fn(i1
, i1
) -> i1
);
714 ifn
!("llvm.eh.typeid.for", fn(i8p
) -> t_i32
);
715 ifn
!("llvm.localescape", fn(...) -> void
);
716 ifn
!("llvm.localrecover", fn(i8p
, i8p
, t_i32
) -> i8p
);
717 ifn
!("llvm.x86.seh.recoverfp", fn(i8p
, i8p
) -> i8p
);
719 ifn
!("llvm.assume", fn(i1
) -> void
);
720 ifn
!("llvm.prefetch", fn(i8p
, t_i32
, t_i32
, t_i32
) -> void
);
722 // This isn't an "LLVM intrinsic", but LLVM's optimization passes
723 // recognize it like one and we assume it exists in `core::slice::cmp`
724 ifn
!("memcmp", fn(i8p
, i8p
, t_isize
) -> t_i32
);
726 // variadic intrinsics
727 ifn
!("llvm.va_start", fn(i8p
) -> void
);
728 ifn
!("llvm.va_end", fn(i8p
) -> void
);
729 ifn
!("llvm.va_copy", fn(i8p
, i8p
) -> void
);
731 if self.sess().instrument_coverage() {
732 ifn
!("llvm.instrprof.increment", fn(i8p
, t_i64
, t_i32
, t_i32
) -> void
);
735 if self.sess().opts
.debuginfo
!= DebugInfo
::None
{
736 ifn
!("llvm.dbg.declare", fn(self.type_metadata(), self.type_metadata()) -> void
);
737 ifn
!("llvm.dbg.value", fn(self.type_metadata(), t_i64
, self.type_metadata()) -> void
);
742 crate fn eh_catch_typeinfo(&self) -> &'b Value
{
743 if let Some(eh_catch_typeinfo
) = self.eh_catch_typeinfo
.get() {
744 return eh_catch_typeinfo
;
747 assert
!(self.sess().target
.is_like_emscripten
);
748 let eh_catch_typeinfo
= match tcx
.lang_items().eh_catch_typeinfo() {
749 Some(def_id
) => self.get_static(def_id
),
752 .type_struct(&[self.type_ptr_to(self.type_isize()), self.type_i8p()], false);
753 self.declare_global("rust_eh_catch_typeinfo", ty
)
756 let eh_catch_typeinfo
= self.const_bitcast(eh_catch_typeinfo
, self.type_i8p());
757 self.eh_catch_typeinfo
.set(Some(eh_catch_typeinfo
));
762 impl<'b
, 'tcx
> CodegenCx
<'b
, 'tcx
> {
763 /// Generates a new symbol name with the given prefix. This symbol name must
764 /// only be used for definitions with `internal` or `private` linkage.
765 pub fn generate_local_symbol_name(&self, prefix
: &str) -> String
{
766 let idx
= self.local_gen_sym_counter
.get();
767 self.local_gen_sym_counter
.set(idx
+ 1);
768 // Include a '.' character, so there can be no accidental conflicts with
769 // user defined names
770 let mut name
= String
::with_capacity(prefix
.len() + 6);
771 name
.push_str(prefix
);
773 base_n
::push_str(idx
as u128
, base_n
::ALPHANUMERIC_ONLY
, &mut name
);
778 impl HasDataLayout
for CodegenCx
<'ll
, 'tcx
> {
780 fn data_layout(&self) -> &TargetDataLayout
{
781 &self.tcx
.data_layout
785 impl HasTargetSpec
for CodegenCx
<'ll
, 'tcx
> {
787 fn target_spec(&self) -> &Target
{
788 &self.tcx
.sess
.target
792 impl ty
::layout
::HasTyCtxt
<'tcx
> for CodegenCx
<'ll
, 'tcx
> {
794 fn tcx(&self) -> TyCtxt
<'tcx
> {
799 impl LayoutOf
for CodegenCx
<'ll
, 'tcx
> {
801 type TyAndLayout
= TyAndLayout
<'tcx
>;
803 fn layout_of(&self, ty
: Ty
<'tcx
>) -> Self::TyAndLayout
{
804 self.spanned_layout_of(ty
, DUMMY_SP
)
807 fn spanned_layout_of(&self, ty
: Ty
<'tcx
>, span
: Span
) -> Self::TyAndLayout
{
808 self.tcx
.layout_of(ty
::ParamEnv
::reveal_all().and(ty
)).unwrap_or_else(|e
| {
809 if let LayoutError
::SizeOverflow(_
) = e
{
810 self.sess().span_fatal(span
, &e
.to_string())
812 bug
!("failed to get layout for `{}`: {}", ty
, e
)
818 impl<'tcx
, 'll
> HasParamEnv
<'tcx
> for CodegenCx
<'ll
, 'tcx
> {
819 fn param_env(&self) -> ty
::ParamEnv
<'tcx
> {
820 ty
::ParamEnv
::reveal_all()