1use std::cmp;
2use std::ops::Range;
3
4use rustc_abi::{
5 Align, ArmCall, BackendRepr, CanonAbi, ExternAbi, HasDataLayout, Reg, Size, WrappingRange,
6};
7use rustc_ast as ast;
8use rustc_ast::{InlineAsmOptions, InlineAsmTemplatePiece};
9use rustc_data_structures::packed::Pu128;
10use rustc_hir::attrs::AttributeKind;
11use rustc_hir::lang_items::LangItem;
12use rustc_lint_defs::builtin::TAIL_CALL_TRACK_CALLER;
13use rustc_middle::mir::{self, AssertKind, InlineAsmMacro, SwitchTargets, UnwindTerminateReason};
14use rustc_middle::ty::layout::{HasTyCtxt, LayoutOf, ValidityRequirement};
15use rustc_middle::ty::print::{with_no_trimmed_paths, with_no_visible_paths};
16use rustc_middle::ty::{self, Instance, Ty, TypeVisitableExt};
17use rustc_middle::{bug, span_bug};
18use rustc_session::config::OptLevel;
19use rustc_span::{Span, Spanned};
20use rustc_target::callconv::{ArgAbi, ArgAttributes, CastTarget, FnAbi, PassMode};
21use tracing::{debug, info};
22
23use super::operand::OperandRef;
24use super::operand::OperandValue::{self, Immediate, Pair, Ref, ZeroSized};
25use super::place::{PlaceRef, PlaceValue};
26use super::{CachedLlbb, FunctionCx, LocalRef};
27use crate::base::{self, is_call_from_compiler_builtins_to_upstream_monomorphization};
28use crate::common::{self, IntPredicate};
29use crate::errors::CompilerBuiltinsCannotCall;
30use crate::mir::IntrinsicResult;
31use crate::traits::*;
32use crate::{MemFlags, meth};
33
34#[derive(#[automatically_derived]
impl ::core::fmt::Debug for MergingSucc {
#[inline]
fn fmt(&self, f: &mut ::core::fmt::Formatter) -> ::core::fmt::Result {
::core::fmt::Formatter::write_str(f,
match self {
MergingSucc::False => "False",
MergingSucc::True => "True",
})
}
}Debug, #[automatically_derived]
impl ::core::cmp::PartialEq for MergingSucc {
#[inline]
fn eq(&self, other: &MergingSucc) -> bool {
let __self_discr = ::core::intrinsics::discriminant_value(self);
let __arg1_discr = ::core::intrinsics::discriminant_value(other);
__self_discr == __arg1_discr
}
}PartialEq)]
38enum MergingSucc {
39 False,
40 True,
41}
42
43#[derive(#[automatically_derived]
impl ::core::fmt::Debug for CallKind {
#[inline]
fn fmt(&self, f: &mut ::core::fmt::Formatter) -> ::core::fmt::Result {
::core::fmt::Formatter::write_str(f,
match self {
CallKind::Normal => "Normal",
CallKind::Tail => "Tail",
})
}
}Debug, #[automatically_derived]
impl ::core::cmp::PartialEq for CallKind {
#[inline]
fn eq(&self, other: &CallKind) -> bool {
let __self_discr = ::core::intrinsics::discriminant_value(self);
let __arg1_discr = ::core::intrinsics::discriminant_value(other);
__self_discr == __arg1_discr
}
}PartialEq)]
46enum CallKind {
47 Normal,
48 Tail,
49}
50
51struct TerminatorCodegenHelper<'tcx> {
54 bb: mir::BasicBlock,
55 terminator: &'tcx mir::Terminator<'tcx>,
56}
57
58impl<'a, 'tcx> TerminatorCodegenHelper<'tcx> {
59 fn funclet<'b, Bx: BuilderMethods<'a, 'tcx>>(
62 &self,
63 fx: &'b mut FunctionCx<'a, 'tcx, Bx>,
64 ) -> Option<&'b Bx::Funclet> {
65 let cleanup_kinds = fx.cleanup_kinds.as_ref()?;
66 let funclet_bb = cleanup_kinds[self.bb].funclet_bb(self.bb)?;
67 if fx.funclets[funclet_bb].is_none() {
76 fx.landing_pad_for(funclet_bb);
77 }
78 Some(
79 fx.funclets[funclet_bb]
80 .as_ref()
81 .expect("landing_pad_for didn't also create funclets entry"),
82 )
83 }
84
85 fn llbb_with_cleanup<Bx: BuilderMethods<'a, 'tcx>>(
88 &self,
89 fx: &mut FunctionCx<'a, 'tcx, Bx>,
90 target: mir::BasicBlock,
91 ) -> Bx::BasicBlock {
92 let (needs_landing_pad, is_cleanupret) = self.llbb_characteristics(fx, target);
93 let mut lltarget = fx.llbb(target);
94 if needs_landing_pad {
95 lltarget = fx.landing_pad_for(target);
96 }
97 if is_cleanupret {
98 if !base::wants_new_eh_instructions(fx.cx.tcx().sess) {
::core::panicking::panic("assertion failed: base::wants_new_eh_instructions(fx.cx.tcx().sess)")
};assert!(base::wants_new_eh_instructions(fx.cx.tcx().sess));
100 {
use ::tracing::__macro_support::Callsite as _;
static __CALLSITE: ::tracing::callsite::DefaultCallsite =
{
static META: ::tracing::Metadata<'static> =
{
::tracing_core::metadata::Metadata::new("event compiler/rustc_codegen_ssa/src/mir/block.rs:100",
"rustc_codegen_ssa::mir::block", ::tracing::Level::DEBUG,
::tracing_core::__macro_support::Option::Some("compiler/rustc_codegen_ssa/src/mir/block.rs"),
::tracing_core::__macro_support::Option::Some(100u32),
::tracing_core::__macro_support::Option::Some("rustc_codegen_ssa::mir::block"),
::tracing_core::field::FieldSet::new(&["message"],
::tracing_core::callsite::Identifier(&__CALLSITE)),
::tracing::metadata::Kind::EVENT)
};
::tracing::callsite::DefaultCallsite::new(&META)
};
let enabled =
::tracing::Level::DEBUG <= ::tracing::level_filters::STATIC_MAX_LEVEL
&&
::tracing::Level::DEBUG <=
::tracing::level_filters::LevelFilter::current() &&
{
let interest = __CALLSITE.interest();
!interest.is_never() &&
::tracing::__macro_support::__is_enabled(__CALLSITE.metadata(),
interest)
};
if enabled {
(|value_set: ::tracing::field::ValueSet|
{
let meta = __CALLSITE.metadata();
::tracing::Event::dispatch(meta, &value_set);
;
})({
#[allow(unused_imports)]
use ::tracing::field::{debug, display, Value};
let mut iter = __CALLSITE.metadata().fields().iter();
__CALLSITE.metadata().fields().value_set(&[(&::tracing::__macro_support::Iterator::next(&mut iter).expect("FieldSet corrupted (this is a bug)"),
::tracing::__macro_support::Option::Some(&format_args!("llbb_with_cleanup: creating cleanup trampoline for {0:?}",
target) as &dyn Value))])
});
} else { ; }
};debug!("llbb_with_cleanup: creating cleanup trampoline for {:?}", target);
101 let name = &::alloc::__export::must_use({
::alloc::fmt::format(format_args!("{0:?}_cleanup_trampoline_{1:?}",
self.bb, target))
})format!("{:?}_cleanup_trampoline_{:?}", self.bb, target);
102 let trampoline_llbb = Bx::append_block(fx.cx, fx.llfn, name);
103 let mut trampoline_bx = Bx::build(fx.cx, trampoline_llbb);
104 trampoline_bx.cleanup_ret(self.funclet(fx).unwrap(), Some(lltarget));
105 trampoline_llbb
106 } else {
107 lltarget
108 }
109 }
110
111 fn llbb_characteristics<Bx: BuilderMethods<'a, 'tcx>>(
112 &self,
113 fx: &mut FunctionCx<'a, 'tcx, Bx>,
114 target: mir::BasicBlock,
115 ) -> (bool, bool) {
116 if let Some(ref cleanup_kinds) = fx.cleanup_kinds {
117 let funclet_bb = cleanup_kinds[self.bb].funclet_bb(self.bb);
118 let target_funclet = cleanup_kinds[target].funclet_bb(target);
119 let (needs_landing_pad, is_cleanupret) = match (funclet_bb, target_funclet) {
120 (None, None) => (false, false),
121 (None, Some(_)) => (true, false),
122 (Some(f), Some(t_f)) => (f != t_f, f != t_f),
123 (Some(_), None) => {
124 let span = self.terminator.source_info.span;
125 ::rustc_middle::util::bug::span_bug_fmt(span,
format_args!("{0:?} - jump out of cleanup?", self.terminator));span_bug!(span, "{:?} - jump out of cleanup?", self.terminator);
126 }
127 };
128 (needs_landing_pad, is_cleanupret)
129 } else {
130 let needs_landing_pad = !fx.mir[self.bb].is_cleanup && fx.mir[target].is_cleanup;
131 let is_cleanupret = false;
132 (needs_landing_pad, is_cleanupret)
133 }
134 }
135
136 fn funclet_br<Bx: BuilderMethods<'a, 'tcx>>(
137 &self,
138 fx: &mut FunctionCx<'a, 'tcx, Bx>,
139 bx: &mut Bx,
140 target: mir::BasicBlock,
141 mergeable_succ: bool,
142 attributes: &[AttributeKind],
143 ) -> MergingSucc {
144 let (needs_landing_pad, is_cleanupret) = self.llbb_characteristics(fx, target);
145 if mergeable_succ && !needs_landing_pad && !is_cleanupret {
146 MergingSucc::True
148 } else {
149 let mut lltarget = fx.llbb(target);
150 if needs_landing_pad {
151 lltarget = fx.landing_pad_for(target);
152 }
153 if is_cleanupret {
154 bx.cleanup_ret(self.funclet(fx).unwrap(), Some(lltarget));
157 } else {
158 bx.br_with_attrs(lltarget, attributes);
159 }
160 MergingSucc::False
161 }
162 }
163
164 fn do_call<Bx: BuilderMethods<'a, 'tcx>>(
167 &self,
168 fx: &mut FunctionCx<'a, 'tcx, Bx>,
169 bx: &mut Bx,
170 fn_abi: &'tcx FnAbi<'tcx, Ty<'tcx>>,
171 fn_ptr: Bx::Value,
172 llargs: &[Bx::Value],
173 destination: Option<(ReturnDest<'tcx, Bx::Value>, mir::BasicBlock)>,
174 mut unwind: mir::UnwindAction,
175 lifetime_ends_after_call: &[(Bx::Value, Size)],
176 instance: Option<Instance<'tcx>>,
177 kind: CallKind,
178 mergeable_succ: bool,
179 ) -> MergingSucc {
180 let tcx = bx.tcx();
181 if let Some(instance) = instance
182 && is_call_from_compiler_builtins_to_upstream_monomorphization(tcx, instance)
183 {
184 if destination.is_some() {
185 let caller_def = fx.instance.def_id();
186 let e = CompilerBuiltinsCannotCall {
187 span: tcx.def_span(caller_def),
188 caller: { let _guard = NoTrimmedGuard::new(); tcx.def_path_str(caller_def) }with_no_trimmed_paths!(tcx.def_path_str(caller_def)),
189 callee: { let _guard = NoTrimmedGuard::new(); tcx.def_path_str(instance.def_id()) }with_no_trimmed_paths!(tcx.def_path_str(instance.def_id())),
190 };
191 tcx.dcx().emit_err(e);
192 } else {
193 {
use ::tracing::__macro_support::Callsite as _;
static __CALLSITE: ::tracing::callsite::DefaultCallsite =
{
static META: ::tracing::Metadata<'static> =
{
::tracing_core::metadata::Metadata::new("event compiler/rustc_codegen_ssa/src/mir/block.rs:193",
"rustc_codegen_ssa::mir::block", ::tracing::Level::INFO,
::tracing_core::__macro_support::Option::Some("compiler/rustc_codegen_ssa/src/mir/block.rs"),
::tracing_core::__macro_support::Option::Some(193u32),
::tracing_core::__macro_support::Option::Some("rustc_codegen_ssa::mir::block"),
::tracing_core::field::FieldSet::new(&["message"],
::tracing_core::callsite::Identifier(&__CALLSITE)),
::tracing::metadata::Kind::EVENT)
};
::tracing::callsite::DefaultCallsite::new(&META)
};
let enabled =
::tracing::Level::INFO <= ::tracing::level_filters::STATIC_MAX_LEVEL
&&
::tracing::Level::INFO <=
::tracing::level_filters::LevelFilter::current() &&
{
let interest = __CALLSITE.interest();
!interest.is_never() &&
::tracing::__macro_support::__is_enabled(__CALLSITE.metadata(),
interest)
};
if enabled {
(|value_set: ::tracing::field::ValueSet|
{
let meta = __CALLSITE.metadata();
::tracing::Event::dispatch(meta, &value_set);
;
})({
#[allow(unused_imports)]
use ::tracing::field::{debug, display, Value};
let mut iter = __CALLSITE.metadata().fields().iter();
__CALLSITE.metadata().fields().value_set(&[(&::tracing::__macro_support::Iterator::next(&mut iter).expect("FieldSet corrupted (this is a bug)"),
::tracing::__macro_support::Option::Some(&format_args!("compiler_builtins call to diverging function {0:?} replaced with abort",
instance.def_id()) as &dyn Value))])
});
} else { ; }
};info!(
194 "compiler_builtins call to diverging function {:?} replaced with abort",
195 instance.def_id()
196 );
197 bx.abort();
198 bx.unreachable();
199 return MergingSucc::False;
200 }
201 }
202
203 let fn_ty = bx.fn_decl_backend_type(fn_abi);
206
207 let caller_attrs = if bx.tcx().def_kind(fx.instance.def_id()).has_codegen_attrs() {
208 Some(bx.tcx().codegen_instance_attrs(fx.instance.def))
209 } else {
210 None
211 };
212 let caller_attrs = caller_attrs.as_deref();
213
214 if !fn_abi.can_unwind {
215 unwind = mir::UnwindAction::Unreachable;
216 }
217
218 let unwind_block = match unwind {
219 mir::UnwindAction::Cleanup(cleanup) => Some(self.llbb_with_cleanup(fx, cleanup)),
220 mir::UnwindAction::Continue => None,
221 mir::UnwindAction::Unreachable => None,
222 mir::UnwindAction::Terminate(reason) => {
223 if fx.mir[self.bb].is_cleanup && base::wants_wasm_eh(fx.cx.tcx().sess) {
224 Some(fx.terminate_block(reason, Some(self.bb)))
227 } else if fx.mir[self.bb].is_cleanup
228 && base::wants_new_eh_instructions(fx.cx.tcx().sess)
229 {
230 None
233 } else {
234 Some(fx.terminate_block(reason, None))
235 }
236 }
237 };
238
239 if kind == CallKind::Tail {
240 bx.tail_call(fn_ty, caller_attrs, fn_abi, fn_ptr, llargs, self.funclet(fx), instance);
241 return MergingSucc::False;
242 }
243
244 if let Some(unwind_block) = unwind_block {
245 let ret_llbb = if let Some((_, target)) = destination {
246 self.llbb_with_cleanup(fx, target)
247 } else {
248 fx.unreachable_block()
249 };
250 let invokeret = bx.invoke(
251 fn_ty,
252 caller_attrs,
253 Some(fn_abi),
254 fn_ptr,
255 llargs,
256 ret_llbb,
257 unwind_block,
258 self.funclet(fx),
259 instance,
260 );
261 if fx.mir[self.bb].is_cleanup {
262 bx.apply_attrs_to_cleanup_callsite(invokeret);
263 }
264
265 if let Some((ret_dest, target)) = destination {
266 bx.switch_to_block(fx.llbb(target));
267 fx.set_debug_loc(bx, self.terminator.source_info);
268 for &(tmp, size) in lifetime_ends_after_call {
269 bx.lifetime_end(tmp, size);
270 }
271 fx.store_return(bx, ret_dest, &fn_abi.ret, invokeret);
272
273 fx.cached_llbbs[target] = CachedLlbb::Some(bx.llbb());
278 }
279 MergingSucc::False
280 } else {
281 let llret = bx.call(
282 fn_ty,
283 caller_attrs,
284 Some(fn_abi),
285 fn_ptr,
286 llargs,
287 self.funclet(fx),
288 instance,
289 );
290 if fx.mir[self.bb].is_cleanup {
291 bx.apply_attrs_to_cleanup_callsite(llret);
292 }
293
294 if let Some((ret_dest, target)) = destination {
295 for &(tmp, size) in lifetime_ends_after_call {
296 bx.lifetime_end(tmp, size);
297 }
298 fx.store_return(bx, ret_dest, &fn_abi.ret, llret);
299 self.funclet_br(fx, bx, target, mergeable_succ, &[])
300 } else {
301 bx.unreachable();
302 MergingSucc::False
303 }
304 }
305 }
306
307 fn do_inlineasm<Bx: BuilderMethods<'a, 'tcx>>(
309 &self,
310 fx: &mut FunctionCx<'a, 'tcx, Bx>,
311 bx: &mut Bx,
312 template: &[InlineAsmTemplatePiece],
313 operands: &[InlineAsmOperandRef<'tcx, Bx>],
314 options: InlineAsmOptions,
315 line_spans: &[Span],
316 destination: Option<mir::BasicBlock>,
317 unwind: mir::UnwindAction,
318 instance: Instance<'_>,
319 mergeable_succ: bool,
320 ) -> MergingSucc {
321 let unwind_target = match unwind {
322 mir::UnwindAction::Cleanup(cleanup) => Some(self.llbb_with_cleanup(fx, cleanup)),
323 mir::UnwindAction::Terminate(reason) => Some(fx.terminate_block(reason, None)),
324 mir::UnwindAction::Continue => None,
325 mir::UnwindAction::Unreachable => None,
326 };
327
328 if operands.iter().any(|x| #[allow(non_exhaustive_omitted_patterns)] match x {
InlineAsmOperandRef::Label { .. } => true,
_ => false,
}matches!(x, InlineAsmOperandRef::Label { .. })) {
329 if !unwind_target.is_none() {
::core::panicking::panic("assertion failed: unwind_target.is_none()")
};assert!(unwind_target.is_none());
330 let ret_llbb = if let Some(target) = destination {
331 self.llbb_with_cleanup(fx, target)
332 } else {
333 fx.unreachable_block()
334 };
335
336 bx.codegen_inline_asm(
337 template,
338 operands,
339 options,
340 line_spans,
341 instance,
342 Some(ret_llbb),
343 None,
344 );
345 MergingSucc::False
346 } else if let Some(cleanup) = unwind_target {
347 let ret_llbb = if let Some(target) = destination {
348 self.llbb_with_cleanup(fx, target)
349 } else {
350 fx.unreachable_block()
351 };
352
353 bx.codegen_inline_asm(
354 template,
355 operands,
356 options,
357 line_spans,
358 instance,
359 Some(ret_llbb),
360 Some((cleanup, self.funclet(fx))),
361 );
362 MergingSucc::False
363 } else {
364 bx.codegen_inline_asm(template, operands, options, line_spans, instance, None, None);
365
366 if let Some(target) = destination {
367 self.funclet_br(fx, bx, target, mergeable_succ, &[])
368 } else {
369 bx.unreachable();
370 MergingSucc::False
371 }
372 }
373 }
374}
375
376impl<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>> FunctionCx<'a, 'tcx, Bx> {
378 fn codegen_resume_terminator(&mut self, helper: TerminatorCodegenHelper<'tcx>, bx: &mut Bx) {
380 if let Some(funclet) = helper.funclet(self) {
381 bx.cleanup_ret(funclet, None);
382 } else {
383 let slot = self.get_personality_slot(bx);
384 let exn0 = slot.project_field(bx, 0);
385 let exn0 = bx.load_operand(exn0).immediate();
386 let exn1 = slot.project_field(bx, 1);
387 let exn1 = bx.load_operand(exn1).immediate();
388 slot.storage_dead(bx);
389
390 bx.resume(exn0, exn1);
391 }
392 }
393
394 fn codegen_switchint_terminator(
395 &mut self,
396 helper: TerminatorCodegenHelper<'tcx>,
397 bx: &mut Bx,
398 discr: &mir::Operand<'tcx>,
399 targets: &SwitchTargets,
400 ) {
401 let discr = self.codegen_operand(bx, discr);
402 let discr_value = discr.immediate();
403 let switch_ty = discr.layout.ty;
404 if let Some(const_discr) = bx.const_to_opt_u128(discr_value, false) {
406 let target = targets.target_for_value(const_discr);
407 bx.br(helper.llbb_with_cleanup(self, target));
408 return;
409 };
410
411 let mut target_iter = targets.iter();
412 if target_iter.len() == 1 {
413 let (test_value, target) = target_iter.next().unwrap();
416 let otherwise = targets.otherwise();
417 let lltarget = helper.llbb_with_cleanup(self, target);
418 let llotherwise = helper.llbb_with_cleanup(self, otherwise);
419 let target_cold = self.cold_blocks[target];
420 let otherwise_cold = self.cold_blocks[otherwise];
421 let expect = if target_cold == otherwise_cold { None } else { Some(otherwise_cold) };
425 if switch_ty == bx.tcx().types.bool {
426 match test_value {
428 0 => {
429 let expect = expect.map(|e| !e);
430 bx.cond_br_with_expect(discr_value, llotherwise, lltarget, expect);
431 }
432 1 => {
433 bx.cond_br_with_expect(discr_value, lltarget, llotherwise, expect);
434 }
435 _ => ::rustc_middle::util::bug::bug_fmt(format_args!("impossible case reached"))bug!(),
436 }
437 } else {
438 let switch_llty = bx.immediate_backend_type(bx.layout_of(switch_ty));
439 let llval = bx.const_uint_big(switch_llty, test_value);
440 let cmp = bx.icmp(IntPredicate::IntEQ, discr_value, llval);
441 bx.cond_br_with_expect(cmp, lltarget, llotherwise, expect);
442 }
443 } else if target_iter.len() == 2
444 && self.mir[targets.otherwise()].is_empty_unreachable()
445 && targets.all_values().contains(&Pu128(0))
446 && targets.all_values().contains(&Pu128(1))
447 {
448 let true_bb = targets.target_for_value(1);
452 let false_bb = targets.target_for_value(0);
453 let true_ll = helper.llbb_with_cleanup(self, true_bb);
454 let false_ll = helper.llbb_with_cleanup(self, false_bb);
455
456 let expected_cond_value = if self.cx.sess().opts.optimize == OptLevel::No {
457 None
458 } else {
459 match (self.cold_blocks[true_bb], self.cold_blocks[false_bb]) {
460 (true, true) | (false, false) => None,
462 (true, false) => Some(false),
464 (false, true) => Some(true),
465 }
466 };
467
468 let bool_ty = bx.tcx().types.bool;
469 let cond = if switch_ty == bool_ty {
470 discr_value
471 } else {
472 let bool_llty = bx.immediate_backend_type(bx.layout_of(bool_ty));
473 bx.unchecked_utrunc(discr_value, bool_llty)
474 };
475 bx.cond_br_with_expect(cond, true_ll, false_ll, expected_cond_value);
476 } else if self.cx.sess().opts.optimize == OptLevel::No
477 && target_iter.len() == 2
478 && self.mir[targets.otherwise()].is_empty_unreachable()
479 {
480 let (test_value1, target1) = target_iter.next().unwrap();
493 let (_test_value2, target2) = target_iter.next().unwrap();
494 let ll1 = helper.llbb_with_cleanup(self, target1);
495 let ll2 = helper.llbb_with_cleanup(self, target2);
496 let switch_llty = bx.immediate_backend_type(bx.layout_of(switch_ty));
497 let llval = bx.const_uint_big(switch_llty, test_value1);
498 let cmp = bx.icmp(IntPredicate::IntEQ, discr_value, llval);
499 bx.cond_br(cmp, ll1, ll2);
500 } else {
501 let otherwise = targets.otherwise();
502 let otherwise_cold = self.cold_blocks[otherwise];
503 let otherwise_unreachable = self.mir[otherwise].is_empty_unreachable();
504 let cold_count = targets.iter().filter(|(_, target)| self.cold_blocks[*target]).count();
505 let none_cold = cold_count == 0;
506 let all_cold = cold_count == targets.iter().len();
507 if (none_cold && (!otherwise_cold || otherwise_unreachable))
508 || (all_cold && (otherwise_cold || otherwise_unreachable))
509 {
510 bx.switch(
513 discr_value,
514 helper.llbb_with_cleanup(self, targets.otherwise()),
515 target_iter
516 .map(|(value, target)| (value, helper.llbb_with_cleanup(self, target))),
517 );
518 } else {
519 bx.switch_with_weights(
521 discr_value,
522 helper.llbb_with_cleanup(self, targets.otherwise()),
523 otherwise_cold,
524 target_iter.map(|(value, target)| {
525 (value, helper.llbb_with_cleanup(self, target), self.cold_blocks[target])
526 }),
527 );
528 }
529 }
530 }
531
532 fn codegen_return_terminator(&mut self, bx: &mut Bx) {
533 if self.fn_abi.c_variadic {
537 let va_list_arg_idx = self.fn_abi.args.len();
539 match self.locals[mir::Local::arg(va_list_arg_idx)] {
540 LocalRef::Place(va_list) => {
541 bx.lifetime_end(va_list.val.llval, va_list.layout.size);
547 }
548 _ => ::rustc_middle::util::bug::bug_fmt(format_args!("C-variadic function must have a `VaList` place"))bug!("C-variadic function must have a `VaList` place"),
549 }
550 }
551 if self.fn_abi.ret.layout.is_uninhabited() {
552 bx.abort();
557 bx.unreachable();
560 return;
561 }
562 let llval = match &self.fn_abi.ret.mode {
563 PassMode::Ignore | PassMode::Indirect { .. } => {
564 bx.ret_void();
565 return;
566 }
567
568 PassMode::Direct(_) | PassMode::Pair(..) => {
569 let op = self.codegen_consume(bx, mir::Place::return_place().as_ref());
570 if let Ref(place_val) = op.val {
571 bx.load_from_place(bx.backend_type(op.layout), place_val)
572 } else {
573 op.immediate_or_packed_pair(bx)
574 }
575 }
576
577 PassMode::Cast { cast: cast_ty, pad_i32: _ } => {
578 let op = match self.locals[mir::RETURN_PLACE] {
579 LocalRef::Operand(op) => op,
580 LocalRef::PendingOperand => ::rustc_middle::util::bug::bug_fmt(format_args!("use of return before def"))bug!("use of return before def"),
581 LocalRef::Place(cg_place) => OperandRef {
582 val: Ref(cg_place.val),
583 layout: cg_place.layout,
584 move_annotation: None,
585 },
586 LocalRef::UnsizedPlace(_) => ::rustc_middle::util::bug::bug_fmt(format_args!("return type must be sized"))bug!("return type must be sized"),
587 };
588 let llslot = match op.val {
589 Immediate(_) | Pair(..) => {
590 let scratch = PlaceRef::alloca(bx, self.fn_abi.ret.layout);
591 op.val.store(bx, scratch);
592 scratch.val.llval
593 }
594 Ref(place_val) => {
595 {
match (&place_val.align, &op.layout.align.abi) {
(left_val, right_val) => {
if !(*left_val == *right_val) {
let kind = ::core::panicking::AssertKind::Eq;
::core::panicking::assert_failed(kind, &*left_val,
&*right_val,
::core::option::Option::Some(format_args!("return place is unaligned!")));
}
}
}
};assert_eq!(
596 place_val.align, op.layout.align.abi,
597 "return place is unaligned!"
598 );
599 place_val.llval
600 }
601 ZeroSized => ::rustc_middle::util::bug::bug_fmt(format_args!("ZST return value shouldn\'t be in PassMode::Cast"))bug!("ZST return value shouldn't be in PassMode::Cast"),
602 };
603
604 if self.fn_abi.conv == CanonAbi::Arm(ArmCall::CCmseNonSecureEntry) {
605 let ret_layout = self.fn_abi.ret.layout;
613 let uninit_ranges = ret_layout.padding_ranges(bx.cx());
614 self.zero_byte_ranges(bx, llslot, ret_layout.size, &uninit_ranges);
615 }
616
617 load_cast(bx, cast_ty, llslot, self.fn_abi.ret.layout.align.abi)
618 }
619 };
620 bx.ret(llval);
621 }
622
623 #[allow(clippy :: suspicious_else_formatting)]
{
let __tracing_attr_span;
let __tracing_attr_guard;
if ::tracing::Level::TRACE <= ::tracing::level_filters::STATIC_MAX_LEVEL
&&
::tracing::Level::TRACE <=
::tracing::level_filters::LevelFilter::current() ||
{ false } {
__tracing_attr_span =
{
use ::tracing::__macro_support::Callsite as _;
static __CALLSITE: ::tracing::callsite::DefaultCallsite =
{
static META: ::tracing::Metadata<'static> =
{
::tracing_core::metadata::Metadata::new("codegen_drop_terminator",
"rustc_codegen_ssa::mir::block", ::tracing::Level::TRACE,
::tracing_core::__macro_support::Option::Some("compiler/rustc_codegen_ssa/src/mir/block.rs"),
::tracing_core::__macro_support::Option::Some(623u32),
::tracing_core::__macro_support::Option::Some("rustc_codegen_ssa::mir::block"),
::tracing_core::field::FieldSet::new(&["source_info",
"location", "target", "unwind", "mergeable_succ"],
::tracing_core::callsite::Identifier(&__CALLSITE)),
::tracing::metadata::Kind::SPAN)
};
::tracing::callsite::DefaultCallsite::new(&META)
};
let mut interest = ::tracing::subscriber::Interest::never();
if ::tracing::Level::TRACE <=
::tracing::level_filters::STATIC_MAX_LEVEL &&
::tracing::Level::TRACE <=
::tracing::level_filters::LevelFilter::current() &&
{ interest = __CALLSITE.interest(); !interest.is_never() }
&&
::tracing::__macro_support::__is_enabled(__CALLSITE.metadata(),
interest) {
let meta = __CALLSITE.metadata();
::tracing::Span::new(meta,
&{
#[allow(unused_imports)]
use ::tracing::field::{debug, display, Value};
let mut iter = meta.fields().iter();
meta.fields().value_set(&[(&::tracing::__macro_support::Iterator::next(&mut iter).expect("FieldSet corrupted (this is a bug)"),
::tracing::__macro_support::Option::Some(&::tracing::field::debug(&source_info)
as &dyn Value)),
(&::tracing::__macro_support::Iterator::next(&mut iter).expect("FieldSet corrupted (this is a bug)"),
::tracing::__macro_support::Option::Some(&::tracing::field::debug(&location)
as &dyn Value)),
(&::tracing::__macro_support::Iterator::next(&mut iter).expect("FieldSet corrupted (this is a bug)"),
::tracing::__macro_support::Option::Some(&::tracing::field::debug(&target)
as &dyn Value)),
(&::tracing::__macro_support::Iterator::next(&mut iter).expect("FieldSet corrupted (this is a bug)"),
::tracing::__macro_support::Option::Some(&::tracing::field::debug(&unwind)
as &dyn Value)),
(&::tracing::__macro_support::Iterator::next(&mut iter).expect("FieldSet corrupted (this is a bug)"),
::tracing::__macro_support::Option::Some(&mergeable_succ as
&dyn Value))])
})
} else {
let span =
::tracing::__macro_support::__disabled_span(__CALLSITE.metadata());
{};
span
}
};
__tracing_attr_guard = __tracing_attr_span.enter();
}
#[warn(clippy :: suspicious_else_formatting)]
{
#[allow(unknown_lints, unreachable_code, clippy ::
diverging_sub_expression, clippy :: empty_loop, clippy ::
let_unit_value, clippy :: let_with_type_underscore, clippy ::
needless_return, clippy :: unreachable)]
if false {
let __tracing_attr_fake_return: MergingSucc = loop {};
return __tracing_attr_fake_return;
}
{
let ty = location.ty(self.mir, bx.tcx()).ty;
let ty = self.monomorphize(ty);
let drop_fn = Instance::resolve_drop_glue(bx.tcx(), ty);
if let ty::InstanceKind::Shim(ty::ShimKind::DropGlue(_, None)) =
drop_fn.def {
return helper.funclet_br(self, bx, target, mergeable_succ,
&[]);
}
let place = self.codegen_place(bx, location.as_ref());
let (args1, args2);
let mut args =
if let Some(llextra) = place.val.llextra {
args2 = [place.val.llval, llextra];
&args2[..]
} else { args1 = [place.val.llval]; &args1[..] };
let (maybe_null, drop_fn, fn_abi, drop_instance) =
match ty.kind() {
ty::Dynamic(_, _) => {
let virtual_drop =
Instance {
def: ty::InstanceKind::Virtual(drop_fn.def_id(), 0),
args: drop_fn.args,
};
{
use ::tracing::__macro_support::Callsite as _;
static __CALLSITE: ::tracing::callsite::DefaultCallsite =
{
static META: ::tracing::Metadata<'static> =
{
::tracing_core::metadata::Metadata::new("event compiler/rustc_codegen_ssa/src/mir/block.rs:672",
"rustc_codegen_ssa::mir::block", ::tracing::Level::DEBUG,
::tracing_core::__macro_support::Option::Some("compiler/rustc_codegen_ssa/src/mir/block.rs"),
::tracing_core::__macro_support::Option::Some(672u32),
::tracing_core::__macro_support::Option::Some("rustc_codegen_ssa::mir::block"),
::tracing_core::field::FieldSet::new(&["message"],
::tracing_core::callsite::Identifier(&__CALLSITE)),
::tracing::metadata::Kind::EVENT)
};
::tracing::callsite::DefaultCallsite::new(&META)
};
let enabled =
::tracing::Level::DEBUG <=
::tracing::level_filters::STATIC_MAX_LEVEL &&
::tracing::Level::DEBUG <=
::tracing::level_filters::LevelFilter::current() &&
{
let interest = __CALLSITE.interest();
!interest.is_never() &&
::tracing::__macro_support::__is_enabled(__CALLSITE.metadata(),
interest)
};
if enabled {
(|value_set: ::tracing::field::ValueSet|
{
let meta = __CALLSITE.metadata();
::tracing::Event::dispatch(meta, &value_set);
;
})({
#[allow(unused_imports)]
use ::tracing::field::{debug, display, Value};
let mut iter = __CALLSITE.metadata().fields().iter();
__CALLSITE.metadata().fields().value_set(&[(&::tracing::__macro_support::Iterator::next(&mut iter).expect("FieldSet corrupted (this is a bug)"),
::tracing::__macro_support::Option::Some(&format_args!("ty = {0:?}",
ty) as &dyn Value))])
});
} else { ; }
};
{
use ::tracing::__macro_support::Callsite as _;
static __CALLSITE: ::tracing::callsite::DefaultCallsite =
{
static META: ::tracing::Metadata<'static> =
{
::tracing_core::metadata::Metadata::new("event compiler/rustc_codegen_ssa/src/mir/block.rs:673",
"rustc_codegen_ssa::mir::block", ::tracing::Level::DEBUG,
::tracing_core::__macro_support::Option::Some("compiler/rustc_codegen_ssa/src/mir/block.rs"),
::tracing_core::__macro_support::Option::Some(673u32),
::tracing_core::__macro_support::Option::Some("rustc_codegen_ssa::mir::block"),
::tracing_core::field::FieldSet::new(&["message"],
::tracing_core::callsite::Identifier(&__CALLSITE)),
::tracing::metadata::Kind::EVENT)
};
::tracing::callsite::DefaultCallsite::new(&META)
};
let enabled =
::tracing::Level::DEBUG <=
::tracing::level_filters::STATIC_MAX_LEVEL &&
::tracing::Level::DEBUG <=
::tracing::level_filters::LevelFilter::current() &&
{
let interest = __CALLSITE.interest();
!interest.is_never() &&
::tracing::__macro_support::__is_enabled(__CALLSITE.metadata(),
interest)
};
if enabled {
(|value_set: ::tracing::field::ValueSet|
{
let meta = __CALLSITE.metadata();
::tracing::Event::dispatch(meta, &value_set);
;
})({
#[allow(unused_imports)]
use ::tracing::field::{debug, display, Value};
let mut iter = __CALLSITE.metadata().fields().iter();
__CALLSITE.metadata().fields().value_set(&[(&::tracing::__macro_support::Iterator::next(&mut iter).expect("FieldSet corrupted (this is a bug)"),
::tracing::__macro_support::Option::Some(&format_args!("drop_fn = {0:?}",
drop_fn) as &dyn Value))])
});
} else { ; }
};
{
use ::tracing::__macro_support::Callsite as _;
static __CALLSITE: ::tracing::callsite::DefaultCallsite =
{
static META: ::tracing::Metadata<'static> =
{
::tracing_core::metadata::Metadata::new("event compiler/rustc_codegen_ssa/src/mir/block.rs:674",
"rustc_codegen_ssa::mir::block", ::tracing::Level::DEBUG,
::tracing_core::__macro_support::Option::Some("compiler/rustc_codegen_ssa/src/mir/block.rs"),
::tracing_core::__macro_support::Option::Some(674u32),
::tracing_core::__macro_support::Option::Some("rustc_codegen_ssa::mir::block"),
::tracing_core::field::FieldSet::new(&["message"],
::tracing_core::callsite::Identifier(&__CALLSITE)),
::tracing::metadata::Kind::EVENT)
};
::tracing::callsite::DefaultCallsite::new(&META)
};
let enabled =
::tracing::Level::DEBUG <=
::tracing::level_filters::STATIC_MAX_LEVEL &&
::tracing::Level::DEBUG <=
::tracing::level_filters::LevelFilter::current() &&
{
let interest = __CALLSITE.interest();
!interest.is_never() &&
::tracing::__macro_support::__is_enabled(__CALLSITE.metadata(),
interest)
};
if enabled {
(|value_set: ::tracing::field::ValueSet|
{
let meta = __CALLSITE.metadata();
::tracing::Event::dispatch(meta, &value_set);
;
})({
#[allow(unused_imports)]
use ::tracing::field::{debug, display, Value};
let mut iter = __CALLSITE.metadata().fields().iter();
__CALLSITE.metadata().fields().value_set(&[(&::tracing::__macro_support::Iterator::next(&mut iter).expect("FieldSet corrupted (this is a bug)"),
::tracing::__macro_support::Option::Some(&format_args!("args = {0:?}",
args) as &dyn Value))])
});
} else { ; }
};
let fn_abi =
bx.fn_abi_of_instance(virtual_drop, ty::List::empty());
let vtable = args[1];
args = &args[..1];
(true,
meth::VirtualIndex::from_index(ty::COMMON_VTABLE_ENTRIES_DROPINPLACE).get_optional_fn(bx,
vtable, ty, fn_abi), fn_abi, virtual_drop)
}
_ =>
(false,
bx.get_fn_addr(drop_fn, Some(PacMetadata::default())),
bx.fn_abi_of_instance(drop_fn, ty::List::empty()), drop_fn),
};
if maybe_null {
let is_not_null = bx.append_sibling_block("is_not_null");
let llty = bx.fn_ptr_backend_type(fn_abi);
let null = bx.const_null(llty);
let non_null =
bx.icmp(base::bin_op_to_icmp_predicate(mir::BinOp::Ne,
false), drop_fn, null);
bx.cond_br(non_null, is_not_null,
helper.llbb_with_cleanup(self, target));
bx.switch_to_block(is_not_null);
self.set_debug_loc(bx, *source_info);
}
helper.do_call(self, bx, fn_abi, drop_fn, args,
Some((ReturnDest::Nothing, target)), unwind, &[],
Some(drop_instance), CallKind::Normal,
!maybe_null && mergeable_succ)
}
}
}#[tracing::instrument(level = "trace", skip(self, helper, bx))]
624 fn codegen_drop_terminator(
625 &mut self,
626 helper: TerminatorCodegenHelper<'tcx>,
627 bx: &mut Bx,
628 source_info: &mir::SourceInfo,
629 location: mir::Place<'tcx>,
630 target: mir::BasicBlock,
631 unwind: mir::UnwindAction,
632 mergeable_succ: bool,
633 ) -> MergingSucc {
634 let ty = location.ty(self.mir, bx.tcx()).ty;
635 let ty = self.monomorphize(ty);
636 let drop_fn = Instance::resolve_drop_glue(bx.tcx(), ty);
637
638 if let ty::InstanceKind::Shim(ty::ShimKind::DropGlue(_, None)) = drop_fn.def {
639 return helper.funclet_br(self, bx, target, mergeable_succ, &[]);
641 }
642
643 let place = self.codegen_place(bx, location.as_ref());
644 let (args1, args2);
645 let mut args = if let Some(llextra) = place.val.llextra {
646 args2 = [place.val.llval, llextra];
647 &args2[..]
648 } else {
649 args1 = [place.val.llval];
650 &args1[..]
651 };
652 let (maybe_null, drop_fn, fn_abi, drop_instance) = match ty.kind() {
653 ty::Dynamic(_, _) => {
656 let virtual_drop = Instance {
669 def: ty::InstanceKind::Virtual(drop_fn.def_id(), 0), args: drop_fn.args,
671 };
672 debug!("ty = {:?}", ty);
673 debug!("drop_fn = {:?}", drop_fn);
674 debug!("args = {:?}", args);
675 let fn_abi = bx.fn_abi_of_instance(virtual_drop, ty::List::empty());
676 let vtable = args[1];
677 args = &args[..1];
679 (
680 true,
681 meth::VirtualIndex::from_index(ty::COMMON_VTABLE_ENTRIES_DROPINPLACE)
682 .get_optional_fn(bx, vtable, ty, fn_abi),
683 fn_abi,
684 virtual_drop,
685 )
686 }
687 _ => (
688 false,
689 bx.get_fn_addr(drop_fn, Some(PacMetadata::default())),
690 bx.fn_abi_of_instance(drop_fn, ty::List::empty()),
691 drop_fn,
692 ),
693 };
694
695 if maybe_null {
698 let is_not_null = bx.append_sibling_block("is_not_null");
699 let llty = bx.fn_ptr_backend_type(fn_abi);
700 let null = bx.const_null(llty);
701 let non_null =
702 bx.icmp(base::bin_op_to_icmp_predicate(mir::BinOp::Ne, false), drop_fn, null);
703 bx.cond_br(non_null, is_not_null, helper.llbb_with_cleanup(self, target));
704 bx.switch_to_block(is_not_null);
705 self.set_debug_loc(bx, *source_info);
706 }
707
708 helper.do_call(
709 self,
710 bx,
711 fn_abi,
712 drop_fn,
713 args,
714 Some((ReturnDest::Nothing, target)),
715 unwind,
716 &[],
717 Some(drop_instance),
718 CallKind::Normal,
719 !maybe_null && mergeable_succ,
720 )
721 }
722
723 fn codegen_assert_terminator(
724 &mut self,
725 helper: TerminatorCodegenHelper<'tcx>,
726 bx: &mut Bx,
727 terminator: &mir::Terminator<'tcx>,
728 cond: &mir::Operand<'tcx>,
729 expected: bool,
730 msg: &mir::AssertMessage<'tcx>,
731 target: mir::BasicBlock,
732 unwind: mir::UnwindAction,
733 mergeable_succ: bool,
734 ) -> MergingSucc {
735 let span = terminator.source_info.span;
736 let cond = self.codegen_operand(bx, cond).immediate();
737 let mut const_cond = bx.const_to_opt_u128(cond, false).map(|c| c == 1);
738
739 if !bx.sess().overflow_checks() && msg.is_optional_overflow_check() {
744 const_cond = Some(expected);
745 }
746
747 if const_cond == Some(expected) {
749 return helper.funclet_br(self, bx, target, mergeable_succ, &[]);
750 }
751
752 let lltarget = helper.llbb_with_cleanup(self, target);
757 let panic_block = bx.append_sibling_block("panic");
758 if expected {
759 bx.cond_br(cond, lltarget, panic_block);
760 } else {
761 bx.cond_br(cond, panic_block, lltarget);
762 }
763
764 bx.switch_to_block(panic_block);
766 self.set_debug_loc(bx, terminator.source_info);
767
768 let location = self.get_caller_location(bx, terminator.source_info).immediate();
770
771 let (lang_item, args) = match msg {
773 AssertKind::BoundsCheck { len, index } => {
774 let len = self.codegen_operand(bx, len).immediate();
775 let index = self.codegen_operand(bx, index).immediate();
776 (LangItem::PanicBoundsCheck, ::alloc::boxed::box_assume_init_into_vec_unsafe(::alloc::intrinsics::write_box_via_move(::alloc::boxed::Box::new_uninit(),
[index, len, location]))vec![index, len, location])
779 }
780 AssertKind::MisalignedPointerDereference { required, found } => {
781 let required = self.codegen_operand(bx, required).immediate();
782 let found = self.codegen_operand(bx, found).immediate();
783 (LangItem::PanicMisalignedPointerDereference, ::alloc::boxed::box_assume_init_into_vec_unsafe(::alloc::intrinsics::write_box_via_move(::alloc::boxed::Box::new_uninit(),
[required, found, location]))vec![required, found, location])
786 }
787 AssertKind::NullPointerDereference => {
788 (LangItem::PanicNullPointerDereference, ::alloc::boxed::box_assume_init_into_vec_unsafe(::alloc::intrinsics::write_box_via_move(::alloc::boxed::Box::new_uninit(),
[location]))vec![location])
791 }
792 AssertKind::NullReferenceConstructed => {
793 (LangItem::PanicNullReferenceConstructed, ::alloc::boxed::box_assume_init_into_vec_unsafe(::alloc::intrinsics::write_box_via_move(::alloc::boxed::Box::new_uninit(),
[location]))vec![location])
796 }
797 AssertKind::InvalidEnumConstruction(source) => {
798 let source = self.codegen_operand(bx, source).immediate();
799 (LangItem::PanicInvalidEnumConstruction, ::alloc::boxed::box_assume_init_into_vec_unsafe(::alloc::intrinsics::write_box_via_move(::alloc::boxed::Box::new_uninit(),
[source, location]))vec![source, location])
802 }
803 _ => {
804 (msg.panic_function(), ::alloc::boxed::box_assume_init_into_vec_unsafe(::alloc::intrinsics::write_box_via_move(::alloc::boxed::Box::new_uninit(),
[location]))vec![location])
806 }
807 };
808
809 let (fn_abi, llfn, instance) = common::build_langcall(bx, span, lang_item);
810
811 let merging_succ = helper.do_call(
813 self,
814 bx,
815 fn_abi,
816 llfn,
817 &args,
818 None,
819 unwind,
820 &[],
821 Some(instance),
822 CallKind::Normal,
823 false,
824 );
825 {
match (&merging_succ, &MergingSucc::False) {
(left_val, right_val) => {
if !(*left_val == *right_val) {
let kind = ::core::panicking::AssertKind::Eq;
::core::panicking::assert_failed(kind, &*left_val,
&*right_val, ::core::option::Option::None);
}
}
}
};assert_eq!(merging_succ, MergingSucc::False);
826 MergingSucc::False
827 }
828
829 fn codegen_terminate_terminator(
830 &mut self,
831 helper: TerminatorCodegenHelper<'tcx>,
832 bx: &mut Bx,
833 terminator: &mir::Terminator<'tcx>,
834 reason: UnwindTerminateReason,
835 ) {
836 let span = terminator.source_info.span;
837 self.set_debug_loc(bx, terminator.source_info);
838
839 let (fn_abi, llfn, instance) = common::build_langcall(bx, span, reason.lang_item());
841
842 let merging_succ = helper.do_call(
844 self,
845 bx,
846 fn_abi,
847 llfn,
848 &[],
849 None,
850 mir::UnwindAction::Unreachable,
851 &[],
852 Some(instance),
853 CallKind::Normal,
854 false,
855 );
856 {
match (&merging_succ, &MergingSucc::False) {
(left_val, right_val) => {
if !(*left_val == *right_val) {
let kind = ::core::panicking::AssertKind::Eq;
::core::panicking::assert_failed(kind, &*left_val,
&*right_val, ::core::option::Option::None);
}
}
}
};assert_eq!(merging_succ, MergingSucc::False);
857 }
858
859 fn codegen_panic_intrinsic(
861 &mut self,
862 helper: &TerminatorCodegenHelper<'tcx>,
863 bx: &mut Bx,
864 intrinsic: ty::IntrinsicDef,
865 instance: Instance<'tcx>,
866 source_info: mir::SourceInfo,
867 target: Option<mir::BasicBlock>,
868 unwind: mir::UnwindAction,
869 mergeable_succ: bool,
870 ) -> Option<MergingSucc> {
871 let Some(requirement) = ValidityRequirement::from_intrinsic(intrinsic.name) else {
875 return None;
876 };
877
878 let ty = instance.args.type_at(0);
879
880 let is_valid = bx
881 .tcx()
882 .check_validity_requirement((requirement, bx.typing_env().as_query_input(ty)))
883 .expect("expect to have layout during codegen");
884
885 if is_valid {
886 let target = target.unwrap();
888 return Some(helper.funclet_br(self, bx, target, mergeable_succ, &[]));
889 }
890
891 let layout = bx.layout_of(ty);
892
893 let msg_str = {
let _guard = NoVisibleGuard::new();
{
{
let _guard = NoTrimmedGuard::new();
{
if layout.is_uninhabited() {
::alloc::__export::must_use({
::alloc::fmt::format(format_args!("attempted to instantiate uninhabited type `{0}`",
ty))
})
} else if requirement == ValidityRequirement::Zero {
::alloc::__export::must_use({
::alloc::fmt::format(format_args!("attempted to zero-initialize type `{0}`, which is invalid",
ty))
})
} else {
::alloc::__export::must_use({
::alloc::fmt::format(format_args!("attempted to leave type `{0}` uninitialized, which is invalid",
ty))
})
}
}
}
}
}with_no_visible_paths!({
894 with_no_trimmed_paths!({
895 if layout.is_uninhabited() {
896 format!("attempted to instantiate uninhabited type `{ty}`")
898 } else if requirement == ValidityRequirement::Zero {
899 format!("attempted to zero-initialize type `{ty}`, which is invalid")
900 } else {
901 format!("attempted to leave type `{ty}` uninitialized, which is invalid")
902 }
903 })
904 });
905 let msg = bx.const_str(&msg_str);
906
907 let (fn_abi, llfn, instance) =
909 common::build_langcall(bx, source_info.span, LangItem::PanicNounwind);
910
911 Some(helper.do_call(
913 self,
914 bx,
915 fn_abi,
916 llfn,
917 &[msg.0, msg.1],
918 target.as_ref().map(|bb| (ReturnDest::Nothing, *bb)),
919 unwind,
920 &[],
921 Some(instance),
922 CallKind::Normal,
923 mergeable_succ,
924 ))
925 }
926
927 fn codegen_call_terminator(
928 &mut self,
929 helper: TerminatorCodegenHelper<'tcx>,
930 bx: &mut Bx,
931 terminator: &mir::Terminator<'tcx>,
932 func: &mir::Operand<'tcx>,
933 args: &[Spanned<mir::Operand<'tcx>>],
934 destination: mir::Place<'tcx>,
935 target: Option<mir::BasicBlock>,
936 unwind: mir::UnwindAction,
937 fn_span: Span,
938 kind: CallKind,
939 mergeable_succ: bool,
940 ) -> MergingSucc {
941 let source_info = mir::SourceInfo { span: fn_span, ..terminator.source_info };
942
943 let callee = self.codegen_operand(bx, func);
945
946 let (instance, mut llfn) = match *callee.layout.ty.kind() {
947 ty::FnDef(def_id, generic_args) => {
948 let instance = ty::Instance::expect_resolve(
949 bx.tcx(),
950 bx.typing_env(),
951 def_id,
952 generic_args,
953 fn_span,
954 );
955
956 match instance.def {
957 ty::InstanceKind::Shim(ty::ShimKind::DropGlue(_, None)) => {
960 let target = target.unwrap();
962 return helper.funclet_br(self, bx, target, mergeable_succ, &[]);
963 }
964 ty::InstanceKind::Intrinsic(def_id) => {
965 let intrinsic = bx.tcx().intrinsic(def_id).unwrap();
966 if let Some(merging_succ) = self.codegen_panic_intrinsic(
967 &helper,
968 bx,
969 intrinsic,
970 instance,
971 source_info,
972 target,
973 unwind,
974 mergeable_succ,
975 ) {
976 return merging_succ;
977 }
978
979 let result_layout =
980 self.cx.layout_of(self.monomorphized_place_ty(destination.as_ref()));
981
982 let (result_place, store_in_local) =
983 if let Some(local) = destination.as_local() {
984 match self.locals[local] {
985 LocalRef::Place(dest) => (Some(dest.val), None),
986 LocalRef::UnsizedPlace(_) => ::rustc_middle::util::bug::bug_fmt(format_args!("return type must be sized"))bug!("return type must be sized"),
987 LocalRef::PendingOperand => (None, Some(local)),
988 LocalRef::Operand(_) => {
989 if result_layout.is_zst() {
990 let place = PlaceRef::new_sized(
991 bx.const_undef(bx.type_ptr()),
992 result_layout,
993 );
994 (Some(place.val), None)
995 } else {
996 ::rustc_middle::util::bug::bug_fmt(format_args!("place local already assigned to"));bug!("place local already assigned to");
997 }
998 }
999 }
1000 } else {
1001 (Some(self.codegen_place(bx, destination.as_ref()).val), None)
1002 };
1003
1004 if let Some(place) = result_place
1005 && place.align < result_layout.align.abi
1006 {
1007 ::rustc_middle::util::bug::span_bug_fmt(self.mir.span,
format_args!("can\'t directly store to unaligned value"));span_bug!(self.mir.span, "can't directly store to unaligned value");
1014 }
1015
1016 let args: Vec<_> =
1017 args.iter().map(|arg| self.codegen_operand(bx, &arg.node)).collect();
1018
1019 let intrinsic_result = self.codegen_intrinsic_call(
1020 bx,
1021 instance,
1022 &args,
1023 result_layout,
1024 result_place,
1025 source_info,
1026 );
1027
1028 if let IntrinsicResult::Operand(op_val) = intrinsic_result {
1029 match (result_place, store_in_local) {
1030 (None, Some(local)) => {
1031 let op = OperandRef {
1032 val: op_val,
1033 layout: result_layout,
1034 move_annotation: None,
1035 };
1036 self.overwrite_local(local, LocalRef::Operand(op));
1037 self.debug_introduce_local(bx, local);
1038 }
1039 (Some(place_val), None) => {
1040 let dest = PlaceRef { val: place_val, layout: result_layout };
1041 op_val.store(bx, dest);
1042 }
1043 _ => ::rustc_middle::util::bug::bug_fmt(format_args!("impossible case reached"))bug!(),
1044 }
1045 }
1046
1047 match intrinsic_result {
1048 IntrinsicResult::Operand(_) | IntrinsicResult::WroteIntoPlace => {
1049 return if let Some(target) = target {
1050 helper.funclet_br(self, bx, target, mergeable_succ, &[])
1051 } else {
1052 bx.unreachable();
1053 MergingSucc::False
1054 };
1055 }
1056 IntrinsicResult::Err(_) => {
1057 if let Some(local) = store_in_local {
1061 let op = OperandRef {
1062 val: OperandValue::poison(bx, result_layout),
1063 layout: result_layout,
1064 move_annotation: None,
1065 };
1066 self.overwrite_local(local, LocalRef::Operand(op));
1067 }
1068 bx.abort();
1071 return MergingSucc::False;
1072 }
1073 IntrinsicResult::Fallback(instance) => {
1074 if intrinsic.must_be_overridden {
1075 ::rustc_middle::util::bug::span_bug_fmt(fn_span,
format_args!("intrinsic {0} must be overridden by codegen backend, but isn\'t",
intrinsic.name));span_bug!(
1076 fn_span,
1077 "intrinsic {} must be overridden by codegen backend, but isn't",
1078 intrinsic.name,
1079 );
1080 }
1081 (Some(instance), None)
1082 }
1083 }
1084 }
1085
1086 _ if kind == CallKind::Tail
1087 && instance.def.requires_caller_location(bx.tcx()) =>
1088 {
1089 if let Some(hir_id) =
1090 terminator.source_info.scope.lint_root(&self.mir.source_scopes)
1091 {
1092 bx.tcx().emit_node_lint(TAIL_CALL_TRACK_CALLER, hir_id, rustc_errors::DiagDecorator(|d| {
1093 _ = d.primary_message("tail calling a function marked with `#[track_caller]` has no special effect").span(fn_span)
1094 }));
1095 }
1096
1097 let instance = ty::Instance::resolve_for_fn_ptr(
1098 bx.tcx(),
1099 bx.typing_env(),
1100 def_id,
1101 generic_args,
1102 )
1103 .unwrap();
1104
1105 (None, Some(bx.get_fn_addr(instance, Some(PacMetadata::default()))))
1106 }
1107 _ => (Some(instance), None),
1108 }
1109 }
1110 ty::FnPtr(..) => (None, Some(callee.immediate())),
1111 _ => ::rustc_middle::util::bug::bug_fmt(format_args!("{0} is not callable",
callee.layout.ty))bug!("{} is not callable", callee.layout.ty),
1112 };
1113
1114 if let Some(instance) = instance
1115 && let Some(name) = bx.tcx().codegen_fn_attrs(instance.def_id()).symbol_name
1116 && name.as_str().starts_with("llvm.")
1117 && name.as_str() != "llvm.wasm.throw"
1121 {
1122 if !!instance.args.has_infer() {
::core::panicking::panic("assertion failed: !instance.args.has_infer()")
};assert!(!instance.args.has_infer());
1123 if !!instance.args.has_escaping_bound_vars() {
::core::panicking::panic("assertion failed: !instance.args.has_escaping_bound_vars()")
};assert!(!instance.args.has_escaping_bound_vars());
1124
1125 let result_layout =
1126 self.cx.layout_of(self.monomorphized_place_ty(destination.as_ref()));
1127
1128 let return_dest = if result_layout.is_zst() {
1129 ReturnDest::Nothing
1130 } else if let Some(index) = destination.as_local() {
1131 match self.locals[index] {
1132 LocalRef::Place(dest) => ReturnDest::Store(dest),
1133 LocalRef::UnsizedPlace(_) => ::rustc_middle::util::bug::bug_fmt(format_args!("return type must be sized"))bug!("return type must be sized"),
1134 LocalRef::PendingOperand => {
1135 ReturnDest::DirectOperand(index)
1138 }
1139 LocalRef::Operand(_) => ::rustc_middle::util::bug::bug_fmt(format_args!("place local already assigned to"))bug!("place local already assigned to"),
1140 }
1141 } else {
1142 ReturnDest::Store(self.codegen_place(bx, destination.as_ref()))
1143 };
1144
1145 let args =
1146 args.into_iter().map(|arg| self.codegen_operand(bx, &arg.node)).collect::<Vec<_>>();
1147
1148 self.set_debug_loc(bx, source_info);
1149
1150 let llret =
1151 bx.codegen_llvm_intrinsic_call(instance, &args, self.mir[helper.bb].is_cleanup);
1152
1153 if let Some(target) = target {
1154 self.store_return(
1155 bx,
1156 return_dest,
1157 &ArgAbi { layout: result_layout, mode: PassMode::Direct(ArgAttributes::new()) },
1158 llret,
1159 );
1160 return helper.funclet_br(self, bx, target, mergeable_succ, &[]);
1161 } else {
1162 bx.unreachable();
1163 return MergingSucc::False;
1164 }
1165 }
1166
1167 let sig = callee.layout.ty.fn_sig(bx.tcx());
1171
1172 let extra_args = &args[sig.inputs().skip_binder().len()..];
1173 let extra_args = bx.tcx().mk_type_list_from_iter(extra_args.iter().map(|op_arg| {
1174 let op_ty = op_arg.node.ty(self.mir, bx.tcx());
1175 self.monomorphize(op_ty)
1176 }));
1177
1178 let fn_abi = match instance {
1179 Some(instance) => bx.fn_abi_of_instance(instance, extra_args),
1180 None => bx.fn_abi_of_fn_ptr(sig, extra_args),
1181 };
1182
1183 let arg_count = fn_abi.args.len() + fn_abi.ret.is_indirect() as usize;
1185
1186 let mut llargs = Vec::with_capacity(arg_count);
1187
1188 let destination = match kind {
1192 CallKind::Normal => {
1193 let return_dest = self.make_return_dest(bx, destination, &fn_abi.ret, &mut llargs);
1194 target.map(|target| (return_dest, target))
1195 }
1196 CallKind::Tail => {
1197 if fn_abi.ret.is_indirect() {
1198 match self.make_return_dest(bx, destination, &fn_abi.ret, &mut llargs) {
1199 ReturnDest::Nothing => {}
1200 _ => ::rustc_middle::util::bug::bug_fmt(format_args!("tail calls to functions with indirect returns cannot store into a destination"))bug!(
1201 "tail calls to functions with indirect returns cannot store into a destination"
1202 ),
1203 }
1204 }
1205 None
1206 }
1207 };
1208
1209 let (first_args, untuple) = if sig.abi() == ExternAbi::RustCall
1212 && let Some((tup, args)) = args.split_last()
1213 {
1214 (args, Some(tup))
1215 } else {
1216 (args, None)
1217 };
1218
1219 let mut tail_call_temporaries = ::alloc::vec::Vec::new()vec![];
1242 if kind == CallKind::Tail {
1243 tail_call_temporaries = ::alloc::vec::from_elem(None, first_args.len())vec![None; first_args.len()];
1244 for (i, arg) in first_args.iter().enumerate() {
1247 if !#[allow(non_exhaustive_omitted_patterns)] match fn_abi.args[i].mode {
PassMode::Indirect { on_stack: false, .. } => true,
_ => false,
}matches!(fn_abi.args[i].mode, PassMode::Indirect { on_stack: false, .. }) {
1248 continue;
1249 }
1250
1251 let op = self.codegen_operand(bx, &arg.node);
1252 let tmp = PlaceRef::alloca(bx, op.layout);
1253 bx.lifetime_start(tmp.val.llval, tmp.layout.size);
1254 op.store_with_annotation(bx, tmp);
1255
1256 tail_call_temporaries[i] = Some(tmp);
1257 }
1258 }
1259
1260 let mut lifetime_ends_after_call: Vec<(Bx::Value, Size)> = Vec::new();
1264 'make_args: for (i, arg) in first_args.iter().enumerate() {
1265 let mut op = self.codegen_operand(bx, &arg.node);
1266
1267 if let (0, Some(ty::InstanceKind::Virtual(_, idx))) = (i, instance.map(|i| i.def)) {
1268 match op.val {
1269 Pair(data_ptr, meta) => {
1270 while !op.layout.ty.is_raw_ptr() && !op.layout.ty.is_ref() {
1280 let (idx, _) = op.layout.non_1zst_field(bx).expect(
1281 "not exactly one non-1-ZST field in a `DispatchFromDyn` type",
1282 );
1283 op = op.extract_field(self, bx, idx.as_usize());
1284 }
1285
1286 llfn = Some(meth::VirtualIndex::from_index(idx).get_fn(
1290 bx,
1291 meta,
1292 op.layout.ty,
1293 fn_abi,
1294 ));
1295 llargs.push(data_ptr);
1296 continue 'make_args;
1297 }
1298 Ref(PlaceValue { llval: data_ptr, llextra: Some(meta), .. }) => {
1299 llfn = Some(meth::VirtualIndex::from_index(idx).get_fn(
1301 bx,
1302 meta,
1303 op.layout.ty,
1304 fn_abi,
1305 ));
1306 llargs.push(data_ptr);
1307 continue;
1308 }
1309 _ => {
1310 ::rustc_middle::util::bug::span_bug_fmt(fn_span,
format_args!("can\'t codegen a virtual call on {0:#?}", op));span_bug!(fn_span, "can't codegen a virtual call on {:#?}", op);
1311 }
1312 }
1313 }
1314
1315 let by_move = if let PassMode::Indirect { on_stack: false, .. } = fn_abi.args[i].mode
1316 && kind == CallKind::Tail
1317 {
1318 let Some(tmp) = tail_call_temporaries[i].take() else {
1331 ::rustc_middle::util::bug::span_bug_fmt(fn_span,
format_args!("missing temporary for indirect tail call argument #{0}", i))span_bug!(fn_span, "missing temporary for indirect tail call argument #{i}")
1332 };
1333
1334 let local = self.mir.args_iter().nth(i).unwrap();
1335
1336 match &self.locals[local] {
1337 LocalRef::Place(arg) => {
1338 bx.typed_place_copy(arg.val, tmp.val, fn_abi.args[i].layout);
1339 op.val = Ref(arg.val);
1340 }
1341 LocalRef::Operand(arg) => {
1342 let Ref(place_value) = arg.val else {
1343 ::rustc_middle::util::bug::bug_fmt(format_args!("only `Ref` should use `PassMode::Indirect`, but got {0:?}",
arg.val));bug!(
1344 "only `Ref` should use `PassMode::Indirect`, but got {:?}",
1345 arg.val
1346 );
1347 };
1348 bx.typed_place_copy(place_value, tmp.val, fn_abi.args[i].layout);
1349 op.val = arg.val;
1350 }
1351 LocalRef::UnsizedPlace(_) => {
1352 ::rustc_middle::util::bug::span_bug_fmt(fn_span,
format_args!("unsized types are not supported"))span_bug!(fn_span, "unsized types are not supported")
1353 }
1354 LocalRef::PendingOperand => {
1355 ::rustc_middle::util::bug::span_bug_fmt(fn_span,
format_args!("argument local should not be pending"))span_bug!(fn_span, "argument local should not be pending")
1356 }
1357 };
1358
1359 bx.lifetime_end(tmp.val.llval, tmp.layout.size);
1360 true
1361 } else {
1362 #[allow(non_exhaustive_omitted_patterns)] match arg.node {
mir::Operand::Move(_) => true,
_ => false,
}matches!(arg.node, mir::Operand::Move(_))
1363 };
1364
1365 self.codegen_argument(
1366 bx,
1367 fn_abi.conv,
1368 op,
1369 by_move,
1370 &mut llargs,
1371 &fn_abi.args[i],
1372 &mut lifetime_ends_after_call,
1373 );
1374 }
1375 let num_untupled = untuple.map(|tup| {
1376 self.codegen_arguments_untupled(
1377 bx,
1378 fn_abi.conv,
1379 &tup.node,
1380 &mut llargs,
1381 &fn_abi.args[first_args.len()..],
1382 &mut lifetime_ends_after_call,
1383 )
1384 });
1385
1386 let needs_location =
1387 instance.is_some_and(|i| i.def.requires_caller_location(self.cx.tcx()));
1388 if needs_location {
1389 let mir_args = if let Some(num_untupled) = num_untupled {
1390 first_args.len() + num_untupled
1391 } else {
1392 args.len()
1393 };
1394 {
match (&fn_abi.args.len(), &(mir_args + 1)) {
(left_val, right_val) => {
if !(*left_val == *right_val) {
let kind = ::core::panicking::AssertKind::Eq;
::core::panicking::assert_failed(kind, &*left_val,
&*right_val,
::core::option::Option::Some(format_args!("#[track_caller] fn\'s must have 1 more argument in their ABI than in their MIR: {0:?} {1:?} {2:?}",
instance, fn_span, fn_abi)));
}
}
}
};assert_eq!(
1395 fn_abi.args.len(),
1396 mir_args + 1,
1397 "#[track_caller] fn's must have 1 more argument in their ABI than in their MIR: {instance:?} {fn_span:?} {fn_abi:?}",
1398 );
1399 let location = self.get_caller_location(bx, source_info);
1400 {
use ::tracing::__macro_support::Callsite as _;
static __CALLSITE: ::tracing::callsite::DefaultCallsite =
{
static META: ::tracing::Metadata<'static> =
{
::tracing_core::metadata::Metadata::new("event compiler/rustc_codegen_ssa/src/mir/block.rs:1400",
"rustc_codegen_ssa::mir::block", ::tracing::Level::DEBUG,
::tracing_core::__macro_support::Option::Some("compiler/rustc_codegen_ssa/src/mir/block.rs"),
::tracing_core::__macro_support::Option::Some(1400u32),
::tracing_core::__macro_support::Option::Some("rustc_codegen_ssa::mir::block"),
::tracing_core::field::FieldSet::new(&["message"],
::tracing_core::callsite::Identifier(&__CALLSITE)),
::tracing::metadata::Kind::EVENT)
};
::tracing::callsite::DefaultCallsite::new(&META)
};
let enabled =
::tracing::Level::DEBUG <= ::tracing::level_filters::STATIC_MAX_LEVEL
&&
::tracing::Level::DEBUG <=
::tracing::level_filters::LevelFilter::current() &&
{
let interest = __CALLSITE.interest();
!interest.is_never() &&
::tracing::__macro_support::__is_enabled(__CALLSITE.metadata(),
interest)
};
if enabled {
(|value_set: ::tracing::field::ValueSet|
{
let meta = __CALLSITE.metadata();
::tracing::Event::dispatch(meta, &value_set);
;
})({
#[allow(unused_imports)]
use ::tracing::field::{debug, display, Value};
let mut iter = __CALLSITE.metadata().fields().iter();
__CALLSITE.metadata().fields().value_set(&[(&::tracing::__macro_support::Iterator::next(&mut iter).expect("FieldSet corrupted (this is a bug)"),
::tracing::__macro_support::Option::Some(&format_args!("codegen_call_terminator({0:?}): location={1:?} (fn_span {2:?})",
terminator, location, fn_span) as &dyn Value))])
});
} else { ; }
};debug!(
1401 "codegen_call_terminator({:?}): location={:?} (fn_span {:?})",
1402 terminator, location, fn_span
1403 );
1404
1405 let last_arg = fn_abi.args.last().unwrap();
1406 self.codegen_argument(
1407 bx,
1408 fn_abi.conv,
1409 location,
1410 false,
1411 &mut llargs,
1412 last_arg,
1413 &mut lifetime_ends_after_call,
1414 );
1415 }
1416
1417 let fn_ptr = match (instance, llfn) {
1418 (Some(instance), None) => bx.get_fn_addr(instance, Some(PacMetadata::default())),
1419 (_, Some(llfn)) => llfn,
1420 _ => ::rustc_middle::util::bug::span_bug_fmt(fn_span,
format_args!("no instance or llfn for call"))span_bug!(fn_span, "no instance or llfn for call"),
1421 };
1422 self.set_debug_loc(bx, source_info);
1423 helper.do_call(
1424 self,
1425 bx,
1426 fn_abi,
1427 fn_ptr,
1428 &llargs,
1429 destination,
1430 unwind,
1431 &lifetime_ends_after_call,
1432 instance,
1433 kind,
1434 mergeable_succ,
1435 )
1436 }
1437
1438 fn codegen_asm_terminator(
1439 &mut self,
1440 helper: TerminatorCodegenHelper<'tcx>,
1441 bx: &mut Bx,
1442 asm_macro: InlineAsmMacro,
1443 terminator: &mir::Terminator<'tcx>,
1444 template: &[ast::InlineAsmTemplatePiece],
1445 operands: &[mir::InlineAsmOperand<'tcx>],
1446 options: ast::InlineAsmOptions,
1447 line_spans: &[Span],
1448 targets: &[mir::BasicBlock],
1449 unwind: mir::UnwindAction,
1450 instance: Instance<'_>,
1451 mergeable_succ: bool,
1452 ) -> MergingSucc {
1453 let span = terminator.source_info.span;
1454
1455 let operands: Vec<_> = operands
1456 .iter()
1457 .map(|op| match *op {
1458 mir::InlineAsmOperand::In { reg, ref value } => {
1459 let value = self.codegen_operand(bx, value);
1460 InlineAsmOperandRef::In { reg, value }
1461 }
1462 mir::InlineAsmOperand::Out { reg, late, ref place } => {
1463 let place = place.map(|place| self.codegen_place(bx, place.as_ref()));
1464 InlineAsmOperandRef::Out { reg, late, place }
1465 }
1466 mir::InlineAsmOperand::InOut { reg, late, ref in_value, ref out_place } => {
1467 let in_value = self.codegen_operand(bx, in_value);
1468 let out_place =
1469 out_place.map(|out_place| self.codegen_place(bx, out_place.as_ref()));
1470 InlineAsmOperandRef::InOut { reg, late, in_value, out_place }
1471 }
1472 mir::InlineAsmOperand::Const { ref value } => {
1473 let const_value = self.eval_mir_constant(value);
1474 let string = common::asm_const_to_str(
1475 bx.tcx(),
1476 span,
1477 const_value,
1478 bx.layout_of(value.ty()),
1479 );
1480 InlineAsmOperandRef::Const { string }
1481 }
1482 mir::InlineAsmOperand::SymFn { ref value } => {
1483 let const_ = self.monomorphize(value.const_);
1484 if let ty::FnDef(def_id, args) = *const_.ty().kind() {
1485 let instance = ty::Instance::resolve_for_fn_ptr(
1486 bx.tcx(),
1487 bx.typing_env(),
1488 def_id,
1489 args,
1490 )
1491 .unwrap();
1492 InlineAsmOperandRef::SymFn { instance }
1493 } else {
1494 ::rustc_middle::util::bug::span_bug_fmt(span,
format_args!("invalid type for asm sym (fn)"));span_bug!(span, "invalid type for asm sym (fn)");
1495 }
1496 }
1497 mir::InlineAsmOperand::SymStatic { def_id } => {
1498 InlineAsmOperandRef::SymStatic { def_id }
1499 }
1500 mir::InlineAsmOperand::Label { target_index } => {
1501 InlineAsmOperandRef::Label { label: self.llbb(targets[target_index]) }
1502 }
1503 })
1504 .collect();
1505
1506 helper.do_inlineasm(
1507 self,
1508 bx,
1509 template,
1510 &operands,
1511 options,
1512 line_spans,
1513 if asm_macro.diverges(options) { None } else { targets.get(0).copied() },
1514 unwind,
1515 instance,
1516 mergeable_succ,
1517 )
1518 }
1519
1520 pub(crate) fn codegen_block(&mut self, mut bb: mir::BasicBlock) {
1521 let llbb = match self.try_llbb(bb) {
1522 Some(llbb) => llbb,
1523 None => return,
1524 };
1525 let bx = &mut Bx::build(self.cx, llbb);
1526 let mir = self.mir;
1527
1528 loop {
1532 let data = &mir[bb];
1533
1534 {
use ::tracing::__macro_support::Callsite as _;
static __CALLSITE: ::tracing::callsite::DefaultCallsite =
{
static META: ::tracing::Metadata<'static> =
{
::tracing_core::metadata::Metadata::new("event compiler/rustc_codegen_ssa/src/mir/block.rs:1534",
"rustc_codegen_ssa::mir::block", ::tracing::Level::DEBUG,
::tracing_core::__macro_support::Option::Some("compiler/rustc_codegen_ssa/src/mir/block.rs"),
::tracing_core::__macro_support::Option::Some(1534u32),
::tracing_core::__macro_support::Option::Some("rustc_codegen_ssa::mir::block"),
::tracing_core::field::FieldSet::new(&["message"],
::tracing_core::callsite::Identifier(&__CALLSITE)),
::tracing::metadata::Kind::EVENT)
};
::tracing::callsite::DefaultCallsite::new(&META)
};
let enabled =
::tracing::Level::DEBUG <= ::tracing::level_filters::STATIC_MAX_LEVEL
&&
::tracing::Level::DEBUG <=
::tracing::level_filters::LevelFilter::current() &&
{
let interest = __CALLSITE.interest();
!interest.is_never() &&
::tracing::__macro_support::__is_enabled(__CALLSITE.metadata(),
interest)
};
if enabled {
(|value_set: ::tracing::field::ValueSet|
{
let meta = __CALLSITE.metadata();
::tracing::Event::dispatch(meta, &value_set);
;
})({
#[allow(unused_imports)]
use ::tracing::field::{debug, display, Value};
let mut iter = __CALLSITE.metadata().fields().iter();
__CALLSITE.metadata().fields().value_set(&[(&::tracing::__macro_support::Iterator::next(&mut iter).expect("FieldSet corrupted (this is a bug)"),
::tracing::__macro_support::Option::Some(&format_args!("codegen_block({0:?}={1:?})",
bb, data) as &dyn Value))])
});
} else { ; }
};debug!("codegen_block({:?}={:?})", bb, data);
1535
1536 for statement in &data.statements {
1537 self.codegen_statement(bx, statement);
1538 }
1539 self.codegen_stmt_debuginfos(bx, &data.after_last_stmt_debuginfos);
1540
1541 let merging_succ = self.codegen_terminator(bx, bb, data.terminator());
1542 if let MergingSucc::False = merging_succ {
1543 break;
1544 }
1545
1546 let mut successors = data.terminator().successors();
1554 let succ = successors.next().unwrap();
1555 if !#[allow(non_exhaustive_omitted_patterns)] match self.cached_llbbs[succ] {
CachedLlbb::None => true,
_ => false,
} {
::core::panicking::panic("assertion failed: matches!(self.cached_llbbs[succ], CachedLlbb::None)")
};assert!(matches!(self.cached_llbbs[succ], CachedLlbb::None));
1556 self.cached_llbbs[succ] = CachedLlbb::Skip;
1557 bb = succ;
1558 }
1559 }
1560
1561 pub(crate) fn codegen_block_as_unreachable(&mut self, bb: mir::BasicBlock) {
1562 let llbb = match self.try_llbb(bb) {
1563 Some(llbb) => llbb,
1564 None => return,
1565 };
1566 let bx = &mut Bx::build(self.cx, llbb);
1567 {
use ::tracing::__macro_support::Callsite as _;
static __CALLSITE: ::tracing::callsite::DefaultCallsite =
{
static META: ::tracing::Metadata<'static> =
{
::tracing_core::metadata::Metadata::new("event compiler/rustc_codegen_ssa/src/mir/block.rs:1567",
"rustc_codegen_ssa::mir::block", ::tracing::Level::DEBUG,
::tracing_core::__macro_support::Option::Some("compiler/rustc_codegen_ssa/src/mir/block.rs"),
::tracing_core::__macro_support::Option::Some(1567u32),
::tracing_core::__macro_support::Option::Some("rustc_codegen_ssa::mir::block"),
::tracing_core::field::FieldSet::new(&["message"],
::tracing_core::callsite::Identifier(&__CALLSITE)),
::tracing::metadata::Kind::EVENT)
};
::tracing::callsite::DefaultCallsite::new(&META)
};
let enabled =
::tracing::Level::DEBUG <= ::tracing::level_filters::STATIC_MAX_LEVEL
&&
::tracing::Level::DEBUG <=
::tracing::level_filters::LevelFilter::current() &&
{
let interest = __CALLSITE.interest();
!interest.is_never() &&
::tracing::__macro_support::__is_enabled(__CALLSITE.metadata(),
interest)
};
if enabled {
(|value_set: ::tracing::field::ValueSet|
{
let meta = __CALLSITE.metadata();
::tracing::Event::dispatch(meta, &value_set);
;
})({
#[allow(unused_imports)]
use ::tracing::field::{debug, display, Value};
let mut iter = __CALLSITE.metadata().fields().iter();
__CALLSITE.metadata().fields().value_set(&[(&::tracing::__macro_support::Iterator::next(&mut iter).expect("FieldSet corrupted (this is a bug)"),
::tracing::__macro_support::Option::Some(&format_args!("codegen_block_as_unreachable({0:?})",
bb) as &dyn Value))])
});
} else { ; }
};debug!("codegen_block_as_unreachable({:?})", bb);
1568 bx.unreachable();
1569 }
1570
1571 fn codegen_terminator(
1572 &mut self,
1573 bx: &mut Bx,
1574 bb: mir::BasicBlock,
1575 terminator: &'tcx mir::Terminator<'tcx>,
1576 ) -> MergingSucc {
1577 {
use ::tracing::__macro_support::Callsite as _;
static __CALLSITE: ::tracing::callsite::DefaultCallsite =
{
static META: ::tracing::Metadata<'static> =
{
::tracing_core::metadata::Metadata::new("event compiler/rustc_codegen_ssa/src/mir/block.rs:1577",
"rustc_codegen_ssa::mir::block", ::tracing::Level::DEBUG,
::tracing_core::__macro_support::Option::Some("compiler/rustc_codegen_ssa/src/mir/block.rs"),
::tracing_core::__macro_support::Option::Some(1577u32),
::tracing_core::__macro_support::Option::Some("rustc_codegen_ssa::mir::block"),
::tracing_core::field::FieldSet::new(&["message"],
::tracing_core::callsite::Identifier(&__CALLSITE)),
::tracing::metadata::Kind::EVENT)
};
::tracing::callsite::DefaultCallsite::new(&META)
};
let enabled =
::tracing::Level::DEBUG <= ::tracing::level_filters::STATIC_MAX_LEVEL
&&
::tracing::Level::DEBUG <=
::tracing::level_filters::LevelFilter::current() &&
{
let interest = __CALLSITE.interest();
!interest.is_never() &&
::tracing::__macro_support::__is_enabled(__CALLSITE.metadata(),
interest)
};
if enabled {
(|value_set: ::tracing::field::ValueSet|
{
let meta = __CALLSITE.metadata();
::tracing::Event::dispatch(meta, &value_set);
;
})({
#[allow(unused_imports)]
use ::tracing::field::{debug, display, Value};
let mut iter = __CALLSITE.metadata().fields().iter();
__CALLSITE.metadata().fields().value_set(&[(&::tracing::__macro_support::Iterator::next(&mut iter).expect("FieldSet corrupted (this is a bug)"),
::tracing::__macro_support::Option::Some(&format_args!("codegen_terminator: {0:?}",
terminator) as &dyn Value))])
});
} else { ; }
};debug!("codegen_terminator: {:?}", terminator);
1578
1579 let helper = TerminatorCodegenHelper { bb, terminator };
1580
1581 let mergeable_succ = || {
1582 let mut successors = terminator.successors();
1585 if let Some(succ) = successors.next()
1586 && successors.next().is_none()
1587 && let &[succ_pred] = self.mir.basic_blocks.predecessors()[succ].as_slice()
1588 {
1589 {
match (&succ_pred, &bb) {
(left_val, right_val) => {
if !(*left_val == *right_val) {
let kind = ::core::panicking::AssertKind::Eq;
::core::panicking::assert_failed(kind, &*left_val,
&*right_val, ::core::option::Option::None);
}
}
}
};assert_eq!(succ_pred, bb);
1592 true
1593 } else {
1594 false
1595 }
1596 };
1597
1598 self.set_debug_loc(bx, terminator.source_info);
1599 match terminator.kind {
1600 mir::TerminatorKind::UnwindResume => {
1601 self.codegen_resume_terminator(helper, bx);
1602 MergingSucc::False
1603 }
1604
1605 mir::TerminatorKind::UnwindTerminate(reason) => {
1606 self.codegen_terminate_terminator(helper, bx, terminator, reason);
1607 MergingSucc::False
1608 }
1609
1610 mir::TerminatorKind::Goto { target } => {
1611 helper.funclet_br(self, bx, target, mergeable_succ(), &terminator.attributes)
1612 }
1613
1614 mir::TerminatorKind::SwitchInt { ref discr, ref targets } => {
1615 self.codegen_switchint_terminator(helper, bx, discr, targets);
1616 MergingSucc::False
1617 }
1618
1619 mir::TerminatorKind::Return => {
1620 self.codegen_return_terminator(bx);
1621 MergingSucc::False
1622 }
1623
1624 mir::TerminatorKind::Unreachable => {
1625 bx.unreachable();
1626 MergingSucc::False
1627 }
1628
1629 mir::TerminatorKind::Drop { place, target, unwind, replace: _, drop } => {
1630 if !drop.is_none() {
{
::core::panicking::panic_fmt(format_args!("Async Drop must be expanded or reset to sync before codegen"));
}
};assert!(
1631 drop.is_none(),
1632 "Async Drop must be expanded or reset to sync before codegen"
1633 );
1634 self.codegen_drop_terminator(
1635 helper,
1636 bx,
1637 &terminator.source_info,
1638 place,
1639 target,
1640 unwind,
1641 mergeable_succ(),
1642 )
1643 }
1644
1645 mir::TerminatorKind::Assert { ref cond, expected, ref msg, target, unwind } => self
1646 .codegen_assert_terminator(
1647 helper,
1648 bx,
1649 terminator,
1650 cond,
1651 expected,
1652 msg,
1653 target,
1654 unwind,
1655 mergeable_succ(),
1656 ),
1657
1658 mir::TerminatorKind::Call {
1659 ref func,
1660 ref args,
1661 destination,
1662 target,
1663 unwind,
1664 call_source: _,
1665 fn_span,
1666 } => self.codegen_call_terminator(
1667 helper,
1668 bx,
1669 terminator,
1670 func,
1671 args,
1672 destination,
1673 target,
1674 unwind,
1675 fn_span,
1676 CallKind::Normal,
1677 mergeable_succ(),
1678 ),
1679 mir::TerminatorKind::TailCall { ref func, ref args, fn_span } => self
1680 .codegen_call_terminator(
1681 helper,
1682 bx,
1683 terminator,
1684 func,
1685 args,
1686 mir::Place::from(mir::RETURN_PLACE),
1687 None,
1688 mir::UnwindAction::Unreachable,
1689 fn_span,
1690 CallKind::Tail,
1691 mergeable_succ(),
1692 ),
1693 mir::TerminatorKind::CoroutineDrop | mir::TerminatorKind::Yield { .. } => {
1694 ::rustc_middle::util::bug::bug_fmt(format_args!("coroutine ops in codegen"))bug!("coroutine ops in codegen")
1695 }
1696 mir::TerminatorKind::FalseEdge { .. } | mir::TerminatorKind::FalseUnwind { .. } => {
1697 ::rustc_middle::util::bug::bug_fmt(format_args!("borrowck false edges in codegen"))bug!("borrowck false edges in codegen")
1698 }
1699
1700 mir::TerminatorKind::InlineAsm {
1701 asm_macro,
1702 template,
1703 ref operands,
1704 options,
1705 line_spans,
1706 ref targets,
1707 unwind,
1708 } => self.codegen_asm_terminator(
1709 helper,
1710 bx,
1711 asm_macro,
1712 terminator,
1713 template,
1714 operands,
1715 options,
1716 line_spans,
1717 targets,
1718 unwind,
1719 self.instance,
1720 mergeable_succ(),
1721 ),
1722 }
1723 }
1724
1725 fn zero_byte_ranges(
1726 &mut self,
1727 bx: &mut Bx,
1728 ptr: Bx::Value,
1729 limit: Size,
1730 ranges: &[Range<Size>],
1731 ) {
1732 let zero = bx.const_u8(0);
1733
1734 for range in ranges {
1735 let end = cmp::min(range.end, limit);
1736 if range.start >= end {
1737 continue;
1738 }
1739 let offset = bx.const_usize(range.start.bytes());
1740 let len = bx.const_usize((end - range.start).bytes());
1741 let ptr = bx.inbounds_ptradd(ptr, offset);
1742 bx.memset(ptr, zero, len, Align::ONE, MemFlags::empty());
1743 }
1744 }
1745
1746 fn codegen_argument(
1747 &mut self,
1748 bx: &mut Bx,
1749 conv: CanonAbi,
1750 op: OperandRef<'tcx, Bx::Value>,
1751 by_move: bool,
1752 llargs: &mut Vec<Bx::Value>,
1753 arg: &ArgAbi<'tcx, Ty<'tcx>>,
1754 lifetime_ends_after_call: &mut Vec<(Bx::Value, Size)>,
1755 ) {
1756 match arg.mode {
1757 PassMode::Ignore => return,
1758 PassMode::Cast { pad_i32: true, .. } => {
1759 llargs.push(bx.const_undef(bx.reg_backend_type(&Reg::i32())));
1761 }
1762 PassMode::Pair(..) => match op.val {
1763 Pair(a, b) => {
1764 llargs.push(a);
1765 llargs.push(b);
1766 return;
1767 }
1768 _ => ::rustc_middle::util::bug::bug_fmt(format_args!("codegen_argument: {0:?} invalid for pair argument",
op))bug!("codegen_argument: {:?} invalid for pair argument", op),
1769 },
1770 PassMode::Indirect { attrs: _, meta_attrs: Some(_), on_stack: _ } => match op.val {
1771 Ref(PlaceValue { llval: a, llextra: Some(b), .. }) => {
1772 llargs.push(a);
1773 llargs.push(b);
1774 return;
1775 }
1776 _ => ::rustc_middle::util::bug::bug_fmt(format_args!("codegen_argument: {0:?} invalid for unsized indirect argument",
op))bug!("codegen_argument: {:?} invalid for unsized indirect argument", op),
1777 },
1778 _ => {}
1779 }
1780
1781 let (mut llval, align, by_ref) = match op.val {
1783 Immediate(_) | Pair(..) => match arg.mode {
1784 PassMode::Indirect { attrs, .. } => {
1785 let required_align = match attrs.pointee_align {
1789 Some(pointee_align) => cmp::max(pointee_align, arg.layout.align.abi),
1790 None => arg.layout.align.abi,
1791 };
1792 let scratch = PlaceValue::alloca(bx, arg.layout.size, required_align);
1793 bx.lifetime_start(scratch.llval, arg.layout.size);
1794 op.store_with_annotation(bx, scratch.with_type(arg.layout));
1795 lifetime_ends_after_call.push((scratch.llval, arg.layout.size));
1796 (scratch.llval, scratch.align, true)
1797 }
1798 PassMode::Cast { .. } => {
1799 let scratch = PlaceRef::alloca(bx, arg.layout);
1800 op.store_with_annotation(bx, scratch);
1801 (scratch.val.llval, scratch.val.align, true)
1802 }
1803 PassMode::Direct(_) => (op.immediate(), arg.layout.align.abi, false),
1804 PassMode::Ignore | PassMode::Pair(..) => {
::core::panicking::panic_fmt(format_args!("internal error: entered unreachable code: {0}",
format_args!("handled above")));
}unreachable!("handled above"),
1805 },
1806 Ref(op_place_val) => match arg.mode {
1807 PassMode::Indirect { attrs, on_stack, .. } => {
1808 let required_align = match attrs.pointee_align {
1812 Some(pointee_align) => cmp::max(pointee_align, arg.layout.align.abi),
1813 None => arg.layout.align.abi,
1814 };
1815 if op_place_val.align < required_align || (!on_stack && !by_move) {
1817 let scratch = PlaceValue::alloca(bx, arg.layout.size, required_align);
1818 bx.lifetime_start(scratch.llval, arg.layout.size);
1819 op.store_with_annotation(bx, scratch.with_type(arg.layout));
1820 lifetime_ends_after_call.push((scratch.llval, arg.layout.size));
1821 (scratch.llval, scratch.align, true)
1822 } else {
1823 (op_place_val.llval, op_place_val.align, true)
1824 }
1825 }
1826 _ => (op_place_val.llval, op_place_val.align, true),
1827 },
1828 ZeroSized => match arg.mode {
1829 PassMode::Indirect { on_stack, .. } => {
1830 if on_stack {
1831 ::rustc_middle::util::bug::bug_fmt(format_args!("ZST {0:?} passed on stack with abi {1:?}",
op, arg));bug!("ZST {op:?} passed on stack with abi {arg:?}");
1834 }
1835 let scratch = PlaceRef::alloca(bx, arg.layout);
1839 (scratch.val.llval, scratch.val.align, true)
1840 }
1841 _ => ::rustc_middle::util::bug::bug_fmt(format_args!("ZST {0:?} wasn\'t ignored, but was passed with abi {1:?}",
op, arg))bug!("ZST {op:?} wasn't ignored, but was passed with abi {arg:?}"),
1842 },
1843 };
1844
1845 if by_ref && !arg.is_indirect() {
1846 if let PassMode::Cast { cast, pad_i32: _ } = &arg.mode {
1848 let scratch_size = cast.size(bx);
1852 let scratch_align = cast.align(bx);
1853 let copy_bytes = cmp::min(cast.unaligned_size(bx).bytes(), arg.layout.size.bytes());
1860 let llscratch = bx.alloca(scratch_size, scratch_align);
1862 bx.lifetime_start(llscratch, scratch_size);
1863 bx.memcpy(
1865 llscratch,
1866 scratch_align,
1867 llval,
1868 align,
1869 bx.const_usize(copy_bytes),
1870 MemFlags::empty(),
1871 None,
1872 );
1873
1874 if conv == CanonAbi::Arm(ArmCall::CCmseNonSecureCall) {
1882 self.zero_byte_ranges(
1883 bx,
1884 llscratch,
1885 Size::from_bytes(copy_bytes),
1886 &arg.layout.padding_ranges(bx.cx()),
1887 );
1888 }
1889
1890 llval = load_cast(bx, cast, llscratch, scratch_align);
1892 bx.lifetime_end(llscratch, scratch_size);
1893 } else {
1894 llval = bx.load(bx.backend_type(arg.layout), llval, align);
1900 if let BackendRepr::Scalar(scalar) = arg.layout.backend_repr {
1901 if scalar.is_bool() {
1902 bx.range_metadata(llval, WrappingRange { start: 0, end: 1 });
1903 }
1904 llval = bx.to_immediate_scalar(llval, scalar);
1906 }
1907 }
1908 }
1909
1910 llargs.push(llval);
1911 }
1912
1913 fn codegen_arguments_untupled(
1914 &mut self,
1915 bx: &mut Bx,
1916 conv: CanonAbi,
1917 operand: &mir::Operand<'tcx>,
1918 llargs: &mut Vec<Bx::Value>,
1919 args: &[ArgAbi<'tcx, Ty<'tcx>>],
1920 lifetime_ends_after_call: &mut Vec<(Bx::Value, Size)>,
1921 ) -> usize {
1922 let tuple = self.codegen_operand(bx, operand);
1923 let by_move = #[allow(non_exhaustive_omitted_patterns)] match operand {
mir::Operand::Move(_) => true,
_ => false,
}matches!(operand, mir::Operand::Move(_));
1924
1925 if let Ref(place_val) = tuple.val {
1927 if place_val.llextra.is_some() {
1928 ::rustc_middle::util::bug::bug_fmt(format_args!("closure arguments must be sized"));bug!("closure arguments must be sized");
1929 }
1930 let tuple_ptr = place_val.with_type(tuple.layout);
1931 for i in 0..tuple.layout.fields.count() {
1932 let field_ptr = tuple_ptr.project_field(bx, i);
1933 let field = bx.load_operand(field_ptr);
1934 self.codegen_argument(
1935 bx,
1936 conv,
1937 field,
1938 by_move,
1939 llargs,
1940 &args[i],
1941 lifetime_ends_after_call,
1942 );
1943 }
1944 } else {
1945 for i in 0..tuple.layout.fields.count() {
1947 let op = tuple.extract_field(self, bx, i);
1948 self.codegen_argument(
1949 bx,
1950 conv,
1951 op,
1952 by_move,
1953 llargs,
1954 &args[i],
1955 lifetime_ends_after_call,
1956 );
1957 }
1958 }
1959 tuple.layout.fields.count()
1960 }
1961
1962 pub(super) fn get_caller_location(
1963 &mut self,
1964 bx: &mut Bx,
1965 source_info: mir::SourceInfo,
1966 ) -> OperandRef<'tcx, Bx::Value> {
1967 self.mir.caller_location_span(source_info, self.caller_location, bx.tcx(), |span: Span| {
1968 let const_loc = bx.tcx().span_as_caller_location(span);
1969 OperandRef::from_const(bx, const_loc, bx.tcx().caller_location_ty())
1970 })
1971 }
1972
1973 fn get_personality_slot(&mut self, bx: &mut Bx) -> PlaceRef<'tcx, Bx::Value> {
1974 let cx = bx.cx();
1975 if let Some(slot) = self.personality_slot {
1976 slot
1977 } else {
1978 let layout = cx.layout_of(Ty::new_tup(
1979 cx.tcx(),
1980 &[Ty::new_mut_ptr(cx.tcx(), cx.tcx().types.u8), cx.tcx().types.i32],
1981 ));
1982 let slot = PlaceRef::alloca(bx, layout);
1983 self.personality_slot = Some(slot);
1984 slot
1985 }
1986 }
1987
1988 fn landing_pad_for(&mut self, bb: mir::BasicBlock) -> Bx::BasicBlock {
1991 if let Some(landing_pad) = self.landing_pads[bb] {
1992 return landing_pad;
1993 }
1994
1995 let landing_pad = self.landing_pad_for_uncached(bb);
1996 self.landing_pads[bb] = Some(landing_pad);
1997 landing_pad
1998 }
1999
2000 fn landing_pad_for_uncached(&mut self, bb: mir::BasicBlock) -> Bx::BasicBlock {
2002 let llbb = self.llbb(bb);
2003 if base::wants_new_eh_instructions(self.cx.sess()) {
2004 let cleanup_bb = Bx::append_block(self.cx, self.llfn, &::alloc::__export::must_use({
::alloc::fmt::format(format_args!("funclet_{0:?}", bb))
})format!("funclet_{bb:?}"));
2005 let mut cleanup_bx = Bx::build(self.cx, cleanup_bb);
2006 let funclet = cleanup_bx.cleanup_pad(None, &[]);
2007 cleanup_bx.br(llbb);
2008 self.funclets[bb] = Some(funclet);
2009 cleanup_bb
2010 } else {
2011 let cleanup_llbb = Bx::append_block(self.cx, self.llfn, "cleanup");
2012 let mut cleanup_bx = Bx::build(self.cx, cleanup_llbb);
2013
2014 let llpersonality = self.cx.eh_personality();
2015 let (exn0, exn1) = cleanup_bx.cleanup_landing_pad(llpersonality);
2016
2017 let slot = self.get_personality_slot(&mut cleanup_bx);
2018 slot.storage_live(&mut cleanup_bx);
2019 Pair(exn0, exn1).store(&mut cleanup_bx, slot);
2020
2021 cleanup_bx.br(llbb);
2022 cleanup_llbb
2023 }
2024 }
2025
2026 fn unreachable_block(&mut self) -> Bx::BasicBlock {
2027 self.unreachable_block.unwrap_or_else(|| {
2028 let llbb = Bx::append_block(self.cx, self.llfn, "unreachable");
2029 let mut bx = Bx::build(self.cx, llbb);
2030 bx.unreachable();
2031 self.unreachable_block = Some(llbb);
2032 llbb
2033 })
2034 }
2035
2036 fn terminate_block(
2037 &mut self,
2038 reason: UnwindTerminateReason,
2039 outer_catchpad_bb: Option<mir::BasicBlock>,
2040 ) -> Bx::BasicBlock {
2041 if true {
if !(outer_catchpad_bb.is_some() ==
(base::wants_wasm_eh(self.cx.tcx().sess) &&
reason == UnwindTerminateReason::InCleanup)) {
::core::panicking::panic("assertion failed: outer_catchpad_bb.is_some() ==\n (base::wants_wasm_eh(self.cx.tcx().sess) &&\n reason == UnwindTerminateReason::InCleanup)")
};
};debug_assert!(
2046 outer_catchpad_bb.is_some()
2047 == (base::wants_wasm_eh(self.cx.tcx().sess)
2048 && reason == UnwindTerminateReason::InCleanup)
2049 );
2050
2051 let mut cache_bb = mir::START_BLOCK;
2054 if let Some(outer_bb) = outer_catchpad_bb {
2057 let cleanup_kinds =
2058 self.cleanup_kinds.as_ref().expect("cleanup_kinds required for funclets");
2059 cache_bb = cleanup_kinds[outer_bb]
2060 .funclet_bb(outer_bb)
2061 .expect("funclet_bb should be in a funclet");
2062
2063 if self.funclets[cache_bb].is_none() {
2065 self.landing_pad_for(cache_bb);
2066 }
2067 }
2068 if let Some((cached_bb, cached_reason)) = self.terminate_blocks[cache_bb]
2069 && reason == cached_reason
2070 {
2071 return cached_bb;
2072 }
2073
2074 let funclet;
2075 let llbb;
2076 let mut bx;
2077 if base::wants_new_eh_instructions(self.cx.sess()) {
2078 llbb = Bx::append_block(self.cx, self.llfn, "cs_terminate");
2118
2119 let mut cs_bx = Bx::build(self.cx, llbb);
2120
2121 let mut outer_cleanuppad = None;
2125 if outer_catchpad_bb.is_some() {
2126 let outer_funclet = self.funclets[cache_bb]
2128 .as_ref()
2129 .expect("landing_pad_for didn't create funclet");
2130 outer_cleanuppad = Some(cs_bx.get_funclet_cleanuppad(outer_funclet));
2131 }
2132 let cp_llbb = Bx::append_block(self.cx, self.llfn, "cp_terminate");
2133 let cs = cs_bx.catch_switch(outer_cleanuppad, None, &[cp_llbb]);
2134 drop(cs_bx);
2135
2136 bx = Bx::build(self.cx, cp_llbb);
2137 let null =
2138 bx.const_null(bx.type_ptr_ext(bx.cx().data_layout().instruction_address_space));
2139
2140 let args = if base::wants_msvc_seh(self.cx.sess()) {
2144 let adjectives = bx.const_i32(0x40);
2151 &[null, adjectives, null] as &[_]
2152 } else {
2153 &[null] as &[_]
2159 };
2160
2161 funclet = Some(bx.catch_pad(cs, args));
2162 } else {
2168 llbb = Bx::append_block(self.cx, self.llfn, "terminate");
2169 bx = Bx::build(self.cx, llbb);
2170
2171 let llpersonality = self.cx.eh_personality();
2172 bx.filter_landing_pad(llpersonality);
2173
2174 funclet = None;
2175 }
2176
2177 self.set_debug_loc(&mut bx, mir::SourceInfo::outermost(self.mir.span));
2178
2179 let (fn_abi, fn_ptr, instance) =
2180 common::build_langcall(&bx, self.mir.span, reason.lang_item());
2181 if is_call_from_compiler_builtins_to_upstream_monomorphization(bx.tcx(), instance) {
2182 bx.abort();
2183 } else {
2184 let fn_ty = bx.fn_decl_backend_type(fn_abi);
2185
2186 let llret = bx.call(fn_ty, None, Some(fn_abi), fn_ptr, &[], funclet.as_ref(), None);
2187 bx.apply_attrs_to_cleanup_callsite(llret);
2188 }
2189
2190 bx.unreachable();
2191
2192 self.terminate_blocks[cache_bb] = Some((llbb, reason));
2193 llbb
2194 }
2195
2196 pub fn llbb(&mut self, bb: mir::BasicBlock) -> Bx::BasicBlock {
2201 self.try_llbb(bb).unwrap()
2202 }
2203
2204 pub(crate) fn try_llbb(&mut self, bb: mir::BasicBlock) -> Option<Bx::BasicBlock> {
2206 match self.cached_llbbs[bb] {
2207 CachedLlbb::None => {
2208 let llbb = Bx::append_block(self.cx, self.llfn, &::alloc::__export::must_use({
::alloc::fmt::format(format_args!("{0:?}", bb))
})format!("{bb:?}"));
2209 self.cached_llbbs[bb] = CachedLlbb::Some(llbb);
2210 Some(llbb)
2211 }
2212 CachedLlbb::Some(llbb) => Some(llbb),
2213 CachedLlbb::Skip => None,
2214 }
2215 }
2216
2217 fn make_return_dest(
2218 &mut self,
2219 bx: &mut Bx,
2220 dest: mir::Place<'tcx>,
2221 fn_ret: &ArgAbi<'tcx, Ty<'tcx>>,
2222 llargs: &mut Vec<Bx::Value>,
2223 ) -> ReturnDest<'tcx, Bx::Value> {
2224 if fn_ret.is_ignore() {
2226 return ReturnDest::Nothing;
2227 }
2228 let dest = if let Some(index) = dest.as_local() {
2229 match self.locals[index] {
2230 LocalRef::Place(dest) => dest,
2231 LocalRef::UnsizedPlace(_) => ::rustc_middle::util::bug::bug_fmt(format_args!("return type must be sized"))bug!("return type must be sized"),
2232 LocalRef::PendingOperand => {
2233 return if fn_ret.is_indirect() {
2236 let tmp = PlaceRef::alloca(bx, fn_ret.layout);
2239 tmp.storage_live(bx);
2240 llargs.push(tmp.val.llval);
2241 ReturnDest::IndirectOperand(tmp, index)
2242 } else {
2243 ReturnDest::DirectOperand(index)
2244 };
2245 }
2246 LocalRef::Operand(_) => {
2247 ::rustc_middle::util::bug::bug_fmt(format_args!("place local already assigned to"));bug!("place local already assigned to");
2248 }
2249 }
2250 } else {
2251 self.codegen_place(bx, dest.as_ref())
2252 };
2253 if fn_ret.is_indirect() {
2254 if dest.val.align < dest.layout.align.abi {
2255 ::rustc_middle::util::bug::span_bug_fmt(self.mir.span,
format_args!("can\'t directly store to unaligned value"));span_bug!(self.mir.span, "can't directly store to unaligned value");
2262 }
2263 llargs.push(dest.val.llval);
2264 ReturnDest::Nothing
2265 } else {
2266 ReturnDest::Store(dest)
2267 }
2268 }
2269
2270 fn store_return(
2272 &mut self,
2273 bx: &mut Bx,
2274 dest: ReturnDest<'tcx, Bx::Value>,
2275 ret_abi: &ArgAbi<'tcx, Ty<'tcx>>,
2276 llval: Bx::Value,
2277 ) {
2278 use self::ReturnDest::*;
2279 let retags_enabled = bx.tcx().sess.opts.unstable_opts.codegen_emit_retag.is_some();
2280 match dest {
2281 Nothing => (),
2282 Store(dst) => {
2283 bx.store_arg(ret_abi, llval, dst);
2284 if retags_enabled {
2285 self.codegen_retag_place(bx, dst, false);
2286 }
2287 }
2288 IndirectOperand(tmp, index) => {
2289 let mut op = bx.load_operand(tmp);
2290 tmp.storage_dead(bx);
2291 if retags_enabled {
2292 op = self.codegen_retag_operand(bx, op, false);
2293 }
2294 self.overwrite_local(index, LocalRef::Operand(op));
2295 self.debug_introduce_local(bx, index);
2296 }
2297 DirectOperand(index) => {
2298 let mut op = if let PassMode::Cast { .. } = ret_abi.mode {
2300 let tmp = PlaceRef::alloca(bx, ret_abi.layout);
2301 tmp.storage_live(bx);
2302 bx.store_arg(ret_abi, llval, tmp);
2303 let op = bx.load_operand(tmp);
2304 tmp.storage_dead(bx);
2305 op
2306 } else {
2307 OperandRef::from_immediate_or_packed_pair(bx, llval, ret_abi.layout)
2308 };
2309 if retags_enabled {
2310 op = self.codegen_retag_operand(bx, op, false);
2311 }
2312 self.overwrite_local(index, LocalRef::Operand(op));
2313 self.debug_introduce_local(bx, index);
2314 }
2315 }
2316 }
2317}
2318
2319enum ReturnDest<'tcx, V> {
2320 Nothing,
2322 Store(PlaceRef<'tcx, V>),
2324 IndirectOperand(PlaceRef<'tcx, V>, mir::Local),
2326 DirectOperand(mir::Local),
2328}
2329
2330fn load_cast<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>>(
2331 bx: &mut Bx,
2332 cast: &CastTarget,
2333 ptr: Bx::Value,
2334 align: Align,
2335) -> Bx::Value {
2336 let cast_ty = bx.cast_backend_type(cast);
2337 if let Some(offset_from_start) = cast.rest_offset {
2338 {
match (&cast.prefix.len(), &1) {
(left_val, right_val) => {
if !(*left_val == *right_val) {
let kind = ::core::panicking::AssertKind::Eq;
::core::panicking::assert_failed(kind, &*left_val,
&*right_val, ::core::option::Option::None);
}
}
}
};assert_eq!(cast.prefix.len(), 1);
2339 {
match (&cast.rest.unit.size, &cast.rest.total) {
(left_val, right_val) => {
if !(*left_val == *right_val) {
let kind = ::core::panicking::AssertKind::Eq;
::core::panicking::assert_failed(kind, &*left_val,
&*right_val, ::core::option::Option::None);
}
}
}
};assert_eq!(cast.rest.unit.size, cast.rest.total);
2340 let first_ty = bx.reg_backend_type(&cast.prefix[0]);
2341 let second_ty = bx.reg_backend_type(&cast.rest.unit);
2342 let first = bx.load(first_ty, ptr, align);
2343 let second_ptr = bx.inbounds_ptradd(ptr, bx.const_usize(offset_from_start.bytes()));
2344 let second = bx.load(second_ty, second_ptr, align.restrict_for_offset(offset_from_start));
2345 let res = bx.cx().const_poison(cast_ty);
2346 let res = bx.insert_value(res, first, 0);
2347 bx.insert_value(res, second, 1)
2348 } else {
2349 bx.load(cast_ty, ptr, align)
2350 }
2351}
2352
2353pub fn store_cast<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>>(
2354 bx: &mut Bx,
2355 cast: &CastTarget,
2356 value: Bx::Value,
2357 ptr: Bx::Value,
2358 align: Align,
2359) {
2360 if let Some(offset_from_start) = cast.rest_offset {
2361 {
match (&cast.prefix.len(), &1) {
(left_val, right_val) => {
if !(*left_val == *right_val) {
let kind = ::core::panicking::AssertKind::Eq;
::core::panicking::assert_failed(kind, &*left_val,
&*right_val, ::core::option::Option::None);
}
}
}
};assert_eq!(cast.prefix.len(), 1);
2362 {
match (&cast.rest.unit.size, &cast.rest.total) {
(left_val, right_val) => {
if !(*left_val == *right_val) {
let kind = ::core::panicking::AssertKind::Eq;
::core::panicking::assert_failed(kind, &*left_val,
&*right_val, ::core::option::Option::None);
}
}
}
};assert_eq!(cast.rest.unit.size, cast.rest.total);
2363 let first = bx.extract_value(value, 0);
2364 let second = bx.extract_value(value, 1);
2365 bx.store(first, ptr, align);
2366 let second_ptr = bx.inbounds_ptradd(ptr, bx.const_usize(offset_from_start.bytes()));
2367 bx.store(second, second_ptr, align.restrict_for_offset(offset_from_start));
2368 } else {
2369 bx.store(value, ptr, align);
2370 };
2371}