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Disable top-down inlining

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This commit is contained in:
Jakob Degen 2022-11-28 03:01:11 -08:00
parent 744a97b98c
commit f4f777772e
10 changed files with 245 additions and 117 deletions
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28
compiler/rustc_mir_transform/src/inline.rs
View file

@ -8,7 +8,6 @@ use rustc_middle::mir::visit::*;
use rustc_middle::mir::*;
use rustc_middle::ty::{self, Instance, InstanceDef, ParamEnv, Ty, TyCtxt};
use rustc_session::config::OptLevel;
use rustc_span::def_id::DefId;
use rustc_span::{hygiene::ExpnKind, ExpnData, LocalExpnId, Span};
use rustc_target::abi::VariantIdx;
use rustc_target::spec::abi::Abi;
@ -87,13 +86,8 @@ fn inline<'tcx>(tcx: TyCtxt<'tcx>, body: &mut Body<'tcx>) -> bool {
let param_env = tcx.param_env_reveal_all_normalized(def_id);
let mut this = Inliner {
tcx,
param_env,
codegen_fn_attrs: tcx.codegen_fn_attrs(def_id),
history: Vec::new(),
changed: false,
};
let mut this =
Inliner { tcx, param_env, codegen_fn_attrs: tcx.codegen_fn_attrs(def_id), changed: false };
let blocks = BasicBlock::new(0)..body.basic_blocks.next_index();
this.process_blocks(body, blocks);
this.changed
@ -104,12 +98,6 @@ struct Inliner<'tcx> {
param_env: ParamEnv<'tcx>,
/// Caller codegen attributes.
codegen_fn_attrs: &'tcx CodegenFnAttrs,
/// Stack of inlined instances.
/// We only check the `DefId` and not the substs because we want to
/// avoid inlining cases of polymorphic recursion.
/// The number of `DefId`s is finite, so checking history is enough
/// to ensure that we do not loop endlessly while inlining.
history: Vec<DefId>,
/// Indicates that the caller body has been modified.
changed: bool,
}
@ -134,12 +122,12 @@ impl<'tcx> Inliner<'tcx> {
debug!("not-inlined {} [{}]", callsite.callee, reason);
continue;
}
Ok(new_blocks) => {
Ok(_) => {
debug!("inlined {}", callsite.callee);
self.changed = true;
self.history.push(callsite.callee.def_id());
self.process_blocks(caller_body, new_blocks);
self.history.pop();
// We could process the blocks returned by `try_inlining` here. However, that
// leads to exponential compile times due to the top-down nature of this kind
// of inlining.
}
}
}
@ -313,10 +301,6 @@ impl<'tcx> Inliner<'tcx> {
return None;
}
if self.history.contains(&callee.def_id()) {
return None;
}
let fn_sig = self.tcx.bound_fn_sig(def_id).subst(self.tcx, substs);
return Some(CallSite {

25
src/test/mir-opt/inline/cycle.g.Inline.diff
View file

@ -10,8 +10,6 @@
+ let _3: (); // in scope 1 at $DIR/cycle.rs:6:5: 6:8
+ let mut _4: &fn() {main}; // in scope 1 at $DIR/cycle.rs:6:5: 6:6
+ let mut _5: (); // in scope 1 at $DIR/cycle.rs:6:5: 6:8
+ scope 2 (inlined <fn() {main} as Fn<()>>::call - shim(fn() {main})) { // at $DIR/cycle.rs:6:5: 6:8
+ }
+ }
bb0: {
@ -29,7 +27,10 @@
+ StorageLive(_4); // scope 1 at $DIR/cycle.rs:6:5: 6:6
+ _4 = &_2; // scope 1 at $DIR/cycle.rs:6:5: 6:6
+ StorageLive(_5); // scope 1 at $DIR/cycle.rs:6:5: 6:8
+ _3 = move (*_4)() -> [return: bb4, unwind: bb2]; // scope 2 at $SRC_DIR/core/src/ops/function.rs:LL:COL
+ _3 = <fn() {main} as Fn<()>>::call(move _4, move _5) -> [return: bb2, unwind: bb3]; // scope 1 at $DIR/cycle.rs:6:5: 6:8
+ // mir::Constant
+ // + span: $DIR/cycle.rs:6:5: 6:6
+ // + literal: Const { ty: for<'a> extern "rust-call" fn(&'a fn() {main}, ()) -> <fn() {main} as FnOnce<()>>::Output {<fn() {main} as Fn<()>>::call}, val: Value(<ZST>) }
}
bb1: {
@ -39,19 +40,19 @@
return; // scope 0 at $DIR/cycle.rs:+2:2: +2:2
+ }
+
+ bb2 (cleanup): {
+ drop(_2) -> bb3; // scope 1 at $DIR/cycle.rs:7:1: 7:2
+ }
+
+ bb3 (cleanup): {
+ resume; // scope 1 at $DIR/cycle.rs:5:1: 7:2
+ }
+
+ bb4: {
+ bb2: {
+ StorageDead(_5); // scope 1 at $DIR/cycle.rs:6:7: 6:8
+ StorageDead(_4); // scope 1 at $DIR/cycle.rs:6:7: 6:8
+ StorageDead(_3); // scope 1 at $DIR/cycle.rs:6:8: 6:9
+ drop(_2) -> bb1; // scope 1 at $DIR/cycle.rs:7:1: 7:2
+ }
+
+ bb3 (cleanup): {
+ drop(_2) -> bb4; // scope 1 at $DIR/cycle.rs:7:1: 7:2
+ }
+
+ bb4 (cleanup): {
+ resume; // scope 1 at $DIR/cycle.rs:5:1: 7:2
}
}

42
src/test/mir-opt/inline/cycle.main.Inline.diff
View file

@ -10,18 +10,6 @@
+ let _3: (); // in scope 1 at $DIR/cycle.rs:6:5: 6:8
+ let mut _4: &fn() {g}; // in scope 1 at $DIR/cycle.rs:6:5: 6:6
+ let mut _5: (); // in scope 1 at $DIR/cycle.rs:6:5: 6:8
+ scope 2 (inlined <fn() {g} as Fn<()>>::call - shim(fn() {g})) { // at $DIR/cycle.rs:6:5: 6:8
+ scope 3 (inlined g) { // at $SRC_DIR/core/src/ops/function.rs:LL:COL
+ let mut _6: fn() {main}; // in scope 3 at $DIR/cycle.rs:12:5: 12:12
+ scope 4 (inlined f::<fn() {main}>) { // at $DIR/cycle.rs:12:5: 12:12
+ debug g => _6; // in scope 4 at $DIR/cycle.rs:5:6: 5:7
+ let _7: (); // in scope 4 at $DIR/cycle.rs:6:5: 6:8
+ let mut _8: &fn() {main}; // in scope 4 at $DIR/cycle.rs:6:5: 6:6
+ scope 5 (inlined <fn() {main} as Fn<()>>::call - shim(fn() {main})) { // at $DIR/cycle.rs:6:5: 6:8
+ }
+ }
+ }
+ }
+ }
bb0: {
@ -39,11 +27,10 @@
+ StorageLive(_4); // scope 1 at $DIR/cycle.rs:6:5: 6:6
+ _4 = &_2; // scope 1 at $DIR/cycle.rs:6:5: 6:6
+ StorageLive(_5); // scope 1 at $DIR/cycle.rs:6:5: 6:8
+ StorageLive(_6); // scope 3 at $DIR/cycle.rs:12:5: 12:12
+ StorageLive(_7); // scope 4 at $DIR/cycle.rs:6:5: 6:8
+ StorageLive(_8); // scope 4 at $DIR/cycle.rs:6:5: 6:6
+ _8 = &_6; // scope 4 at $DIR/cycle.rs:6:5: 6:6
+ _7 = move (*_8)() -> [return: bb4, unwind: bb2]; // scope 5 at $SRC_DIR/core/src/ops/function.rs:LL:COL
+ _3 = <fn() {g} as Fn<()>>::call(move _4, move _5) -> [return: bb2, unwind: bb3]; // scope 1 at $DIR/cycle.rs:6:5: 6:8
+ // mir::Constant
+ // + span: $DIR/cycle.rs:6:5: 6:6
+ // + literal: Const { ty: for<'a> extern "rust-call" fn(&'a fn() {g}, ()) -> <fn() {g} as FnOnce<()>>::Output {<fn() {g} as Fn<()>>::call}, val: Value(<ZST>) }
}
bb1: {
@ -53,22 +40,19 @@
return; // scope 0 at $DIR/cycle.rs:+2:2: +2:2
+ }
+
+ bb2 (cleanup): {
+ drop(_2) -> bb3; // scope 1 at $DIR/cycle.rs:7:1: 7:2
+ }
+
+ bb3 (cleanup): {
+ resume; // scope 1 at $DIR/cycle.rs:5:1: 7:2
+ }
+
+ bb4: {
+ StorageDead(_8); // scope 4 at $DIR/cycle.rs:6:7: 6:8
+ StorageDead(_7); // scope 4 at $DIR/cycle.rs:6:8: 6:9
+ StorageDead(_6); // scope 3 at $DIR/cycle.rs:12:5: 12:12
+ bb2: {
+ StorageDead(_5); // scope 1 at $DIR/cycle.rs:6:7: 6:8
+ StorageDead(_4); // scope 1 at $DIR/cycle.rs:6:7: 6:8
+ StorageDead(_3); // scope 1 at $DIR/cycle.rs:6:8: 6:9
+ drop(_2) -> bb1; // scope 1 at $DIR/cycle.rs:7:1: 7:2
+ }
+
+ bb3 (cleanup): {
+ drop(_2) -> bb4; // scope 1 at $DIR/cycle.rs:7:1: 7:2
+ }
+
+ bb4 (cleanup): {
+ resume; // scope 1 at $DIR/cycle.rs:5:1: 7:2
}
}

50
src/test/mir-opt/inline/exponential_runtime.main.Inline.diff Normal file
View file

@ -0,0 +1,50 @@
- // MIR for `main` before Inline
+ // MIR for `main` after Inline
fn main() -> () {
let mut _0: (); // return place in scope 0 at $DIR/exponential_runtime.rs:+0:11: +0:11
let _1: (); // in scope 0 at $DIR/exponential_runtime.rs:+1:5: +1:22
+ scope 1 (inlined <() as G>::call) { // at $DIR/exponential_runtime.rs:86:5: 86:22
+ let _2: (); // in scope 1 at $DIR/exponential_runtime.rs:73:9: 73:25
+ let _3: (); // in scope 1 at $DIR/exponential_runtime.rs:74:9: 74:25
+ let _4: (); // in scope 1 at $DIR/exponential_runtime.rs:75:9: 75:25
+ }
bb0: {
StorageLive(_1); // scope 0 at $DIR/exponential_runtime.rs:+1:5: +1:22
- _1 = <() as G>::call() -> bb1; // scope 0 at $DIR/exponential_runtime.rs:+1:5: +1:22
+ StorageLive(_2); // scope 1 at $DIR/exponential_runtime.rs:73:9: 73:25
+ _2 = <() as F>::call() -> bb1; // scope 1 at $DIR/exponential_runtime.rs:73:9: 73:25
// mir::Constant
- // + span: $DIR/exponential_runtime.rs:86:5: 86:20
- // + literal: Const { ty: fn() {<() as G>::call}, val: Value(<ZST>) }
+ // + span: $DIR/exponential_runtime.rs:73:9: 73:23
+ // + literal: Const { ty: fn() {<() as F>::call}, val: Value(<ZST>) }
}
bb1: {
+ StorageDead(_2); // scope 1 at $DIR/exponential_runtime.rs:73:25: 73:26
+ StorageLive(_3); // scope 1 at $DIR/exponential_runtime.rs:74:9: 74:25
+ _3 = <() as F>::call() -> bb2; // scope 1 at $DIR/exponential_runtime.rs:74:9: 74:25
+ // mir::Constant
+ // + span: $DIR/exponential_runtime.rs:74:9: 74:23
+ // + literal: Const { ty: fn() {<() as F>::call}, val: Value(<ZST>) }
+ }
+
+ bb2: {
+ StorageDead(_3); // scope 1 at $DIR/exponential_runtime.rs:74:25: 74:26
+ StorageLive(_4); // scope 1 at $DIR/exponential_runtime.rs:75:9: 75:25
+ _4 = <() as F>::call() -> bb3; // scope 1 at $DIR/exponential_runtime.rs:75:9: 75:25
+ // mir::Constant
+ // + span: $DIR/exponential_runtime.rs:75:9: 75:23
+ // + literal: Const { ty: fn() {<() as F>::call}, val: Value(<ZST>) }
+ }
+
+ bb3: {
+ StorageDead(_4); // scope 1 at $DIR/exponential_runtime.rs:75:25: 75:26
StorageDead(_1); // scope 0 at $DIR/exponential_runtime.rs:+1:22: +1:23
_0 = const (); // scope 0 at $DIR/exponential_runtime.rs:+0:11: +2:2
return; // scope 0 at $DIR/exponential_runtime.rs:+2:2: +2:2
}
}

87
src/test/mir-opt/inline/exponential_runtime.rs Normal file
View file

@ -0,0 +1,87 @@
// Checks that code with exponential runtime does not have exponential behavior in inlining.
trait A {
fn call();
}
trait B {
fn call();
}
impl<T: A> B for T {
#[inline]
fn call() {
<T as A>::call();
<T as A>::call();
<T as A>::call();
}
}
trait C {
fn call();
}
impl<T: B> C for T {
#[inline]
fn call() {
<T as B>::call();
<T as B>::call();
<T as B>::call();
}
}
trait D {
fn call();
}
impl<T: C> D for T {
#[inline]
fn call() {
<T as C>::call();
<T as C>::call();
<T as C>::call();
}
}
trait E {
fn call();
}
impl<T: D> E for T {
#[inline]
fn call() {
<T as D>::call();
<T as D>::call();
<T as D>::call();
}
}
trait F {
fn call();
}
impl<T: E> F for T {
#[inline]
fn call() {
<T as E>::call();
<T as E>::call();
<T as E>::call();
}
}
trait G {
fn call();
}
impl<T: F> G for T {
#[inline]
fn call() {
<T as F>::call();
<T as F>::call();
<T as F>::call();
}
}
impl A for () {
#[inline(never)]
fn call() {}
}
// EMIT_MIR exponential_runtime.main.Inline.diff
fn main() {
<() as G>::call();
}

11
src/test/mir-opt/inline/inline_cycle.one.Inline.diff
View file

@ -5,20 +5,17 @@
let mut _0: (); // return place in scope 0 at $DIR/inline_cycle.rs:+0:10: +0:10
let _1: (); // in scope 0 at $DIR/inline_cycle.rs:+1:5: +1:24
+ scope 1 (inlined <C as Call>::call) { // at $DIR/inline_cycle.rs:14:5: 14:24
+ scope 2 (inlined <A<C> as Call>::call) { // at $DIR/inline_cycle.rs:43:9: 43:23
+ scope 3 (inlined <B<C> as Call>::call) { // at $DIR/inline_cycle.rs:28:9: 28:31
+ }
+ }
+ }
bb0: {
StorageLive(_1); // scope 0 at $DIR/inline_cycle.rs:+1:5: +1:24
- _1 = <C as Call>::call() -> bb1; // scope 0 at $DIR/inline_cycle.rs:+1:5: +1:24
+ _1 = <C as Call>::call() -> bb1; // scope 3 at $DIR/inline_cycle.rs:36:9: 36:28
+ _1 = <A<C> as Call>::call() -> bb1; // scope 1 at $DIR/inline_cycle.rs:43:9: 43:23
// mir::Constant
- // + span: $DIR/inline_cycle.rs:14:5: 14:22
+ // + span: $DIR/inline_cycle.rs:36:9: 36:26
// + literal: Const { ty: fn() {<C as Call>::call}, val: Value(<ZST>) }
- // + literal: Const { ty: fn() {<C as Call>::call}, val: Value(<ZST>) }
+ // + span: $DIR/inline_cycle.rs:43:9: 43:21
+ // + literal: Const { ty: fn() {<A<C> as Call>::call}, val: Value(<ZST>) }
}
bb1: {

23
src/test/mir-opt/inline/inline_cycle.two.Inline.diff
View file

@ -9,11 +9,6 @@
+ debug f => _2; // in scope 1 at $DIR/inline_cycle.rs:53:22: 53:23
+ let _3: (); // in scope 1 at $DIR/inline_cycle.rs:54:5: 54:8
+ let mut _4: (); // in scope 1 at $DIR/inline_cycle.rs:54:5: 54:8
+ scope 2 (inlined <fn() {f} as FnOnce<()>>::call_once - shim(fn() {f})) { // at $DIR/inline_cycle.rs:54:5: 54:8
+ scope 3 (inlined f) { // at $SRC_DIR/core/src/ops/function.rs:LL:COL
+ let _5: (); // in scope 3 at $DIR/inline_cycle.rs:59:5: 59:12
+ }
+ }
+ }
bb0: {
@ -23,23 +18,19 @@
+ _2 = f; // scope 0 at $DIR/inline_cycle.rs:+1:5: +1:12
// mir::Constant
- // + span: $DIR/inline_cycle.rs:49:5: 49:9
+ // + span: $DIR/inline_cycle.rs:49:10: 49:11
+ // + literal: Const { ty: fn() {f}, val: Value(<ZST>) }
- // + literal: Const { ty: fn(fn() {f}) {call::<fn() {f}>}, val: Value(<ZST>) }
- // mir::Constant
// + span: $DIR/inline_cycle.rs:49:10: 49:11
// + literal: Const { ty: fn() {f}, val: Value(<ZST>) }
+ StorageLive(_3); // scope 1 at $DIR/inline_cycle.rs:54:5: 54:8
+ StorageLive(_4); // scope 1 at $DIR/inline_cycle.rs:54:5: 54:8
+ StorageLive(_5); // scope 3 at $DIR/inline_cycle.rs:59:5: 59:12
+ _5 = call::<fn() {f}>(f) -> bb1; // scope 3 at $DIR/inline_cycle.rs:59:5: 59:12
+ _3 = <fn() {f} as FnOnce<()>>::call_once(move _2, move _4) -> bb1; // scope 1 at $DIR/inline_cycle.rs:54:5: 54:8
+ // mir::Constant
+ // + span: $DIR/inline_cycle.rs:59:5: 59:9
// + literal: Const { ty: fn(fn() {f}) {call::<fn() {f}>}, val: Value(<ZST>) }
// mir::Constant
- // + span: $DIR/inline_cycle.rs:49:10: 49:11
+ // + span: $DIR/inline_cycle.rs:59:10: 59:11
// + literal: Const { ty: fn() {f}, val: Value(<ZST>) }
+ // + span: $DIR/inline_cycle.rs:54:5: 54:6
+ // + literal: Const { ty: extern "rust-call" fn(fn() {f}, ()) -> <fn() {f} as FnOnce<()>>::Output {<fn() {f} as FnOnce<()>>::call_once}, val: Value(<ZST>) }
}
bb1: {
+ StorageDead(_5); // scope 3 at $DIR/inline_cycle.rs:59:12: 59:13
+ StorageDead(_4); // scope 1 at $DIR/inline_cycle.rs:54:7: 54:8
+ StorageDead(_3); // scope 1 at $DIR/inline_cycle.rs:54:8: 54:9
+ StorageDead(_2); // scope 0 at $DIR/inline_cycle.rs:+1:5: +1:12

9
src/test/mir-opt/inline/inline_cycle_generic.main.Inline.diff
View file

@ -6,21 +6,18 @@
let _1: (); // in scope 0 at $DIR/inline_cycle_generic.rs:+1:5: +1:24
+ scope 1 (inlined <C as Call>::call) { // at $DIR/inline_cycle_generic.rs:9:5: 9:24
+ scope 2 (inlined <B<A> as Call>::call) { // at $DIR/inline_cycle_generic.rs:38:9: 38:31
+ scope 3 (inlined <A as Call>::call) { // at $DIR/inline_cycle_generic.rs:31:9: 31:28
+ scope 4 (inlined <B<C> as Call>::call) { // at $DIR/inline_cycle_generic.rs:23:9: 23:31
+ }
+ }
+ }
+ }
bb0: {
StorageLive(_1); // scope 0 at $DIR/inline_cycle_generic.rs:+1:5: +1:24
- _1 = <C as Call>::call() -> bb1; // scope 0 at $DIR/inline_cycle_generic.rs:+1:5: +1:24
+ _1 = <C as Call>::call() -> bb1; // scope 4 at $DIR/inline_cycle_generic.rs:31:9: 31:28
+ _1 = <A as Call>::call() -> bb1; // scope 2 at $DIR/inline_cycle_generic.rs:31:9: 31:28
// mir::Constant
- // + span: $DIR/inline_cycle_generic.rs:9:5: 9:22
- // + literal: Const { ty: fn() {<C as Call>::call}, val: Value(<ZST>) }
+ // + span: $DIR/inline_cycle_generic.rs:31:9: 31:26
// + literal: Const { ty: fn() {<C as Call>::call}, val: Value(<ZST>) }
+ // + literal: Const { ty: fn() {<A as Call>::call}, val: Value(<ZST>) }
}
bb1: {

52
src/test/mir-opt/inline/inline_diverging.h.Inline.diff
View file

@ -19,14 +19,6 @@
+ scope 3 {
+ debug b => _9; // in scope 3 at $DIR/inline_diverging.rs:28:9: 28:10
+ }
+ scope 6 (inlined <fn() -> ! {sleep} as Fn<()>>::call - shim(fn() -> ! {sleep})) { // at $DIR/inline_diverging.rs:28:13: 28:16
+ scope 7 (inlined sleep) { // at $SRC_DIR/core/src/ops/function.rs:LL:COL
+ }
+ }
+ }
+ scope 4 (inlined <fn() -> ! {sleep} as Fn<()>>::call - shim(fn() -> ! {sleep})) { // at $DIR/inline_diverging.rs:27:13: 27:16
+ scope 5 (inlined sleep) { // at $SRC_DIR/core/src/ops/function.rs:LL:COL
+ }
+ }
+ }
@ -46,11 +38,51 @@
+ StorageLive(_4); // scope 1 at $DIR/inline_diverging.rs:27:13: 27:14
+ _4 = &_2; // scope 1 at $DIR/inline_diverging.rs:27:13: 27:14
+ StorageLive(_5); // scope 1 at $DIR/inline_diverging.rs:27:13: 27:16
+ goto -> bb1; // scope 5 at $DIR/inline_diverging.rs:39:5: 39:12
+ _3 = <fn() -> ! {sleep} as Fn<()>>::call(move _4, move _5) -> [return: bb1, unwind: bb5]; // scope 1 at $DIR/inline_diverging.rs:27:13: 27:16
+ // mir::Constant
+ // + span: $DIR/inline_diverging.rs:27:13: 27:14
+ // + literal: Const { ty: for<'a> extern "rust-call" fn(&'a fn() -> ! {sleep}, ()) -> <fn() -> ! {sleep} as FnOnce<()>>::Output {<fn() -> ! {sleep} as Fn<()>>::call}, val: Value(<ZST>) }
+ }
+
+ bb1: {
+ goto -> bb1; // scope 5 at $DIR/inline_diverging.rs:39:5: 39:12
+ StorageDead(_5); // scope 1 at $DIR/inline_diverging.rs:27:15: 27:16
+ StorageDead(_4); // scope 1 at $DIR/inline_diverging.rs:27:15: 27:16
+ StorageLive(_6); // scope 2 at $DIR/inline_diverging.rs:28:13: 28:14
+ _6 = &_2; // scope 2 at $DIR/inline_diverging.rs:28:13: 28:14
+ StorageLive(_7); // scope 2 at $DIR/inline_diverging.rs:28:13: 28:16
+ _9 = <fn() -> ! {sleep} as Fn<()>>::call(move _6, move _7) -> [return: bb2, unwind: bb4]; // scope 2 at $DIR/inline_diverging.rs:28:13: 28:16
+ // mir::Constant
+ // + span: $DIR/inline_diverging.rs:28:13: 28:14
+ // + literal: Const { ty: for<'a> extern "rust-call" fn(&'a fn() -> ! {sleep}, ()) -> <fn() -> ! {sleep} as FnOnce<()>>::Output {<fn() -> ! {sleep} as Fn<()>>::call}, val: Value(<ZST>) }
+ }
+
+ bb2: {
+ StorageDead(_7); // scope 2 at $DIR/inline_diverging.rs:28:15: 28:16
+ StorageDead(_6); // scope 2 at $DIR/inline_diverging.rs:28:15: 28:16
+ StorageLive(_8); // scope 3 at $DIR/inline_diverging.rs:29:6: 29:7
+ _8 = move _3; // scope 3 at $DIR/inline_diverging.rs:29:6: 29:7
+ Deinit(_1); // scope 3 at $DIR/inline_diverging.rs:29:5: 29:11
+ (_1.0: !) = move _8; // scope 3 at $DIR/inline_diverging.rs:29:5: 29:11
+ (_1.1: !) = move _9; // scope 3 at $DIR/inline_diverging.rs:29:5: 29:11
+ StorageDead(_8); // scope 3 at $DIR/inline_diverging.rs:29:10: 29:11
+ StorageDead(_3); // scope 1 at $DIR/inline_diverging.rs:30:1: 30:2
+ drop(_2) -> bb3; // scope 1 at $DIR/inline_diverging.rs:30:1: 30:2
+ }
+
+ bb3: {
+ unreachable; // scope 0 at $DIR/inline_diverging.rs:30:2: 30:2
+ }
+
+ bb4 (cleanup): {
+ drop(_3) -> bb5; // scope 1 at $DIR/inline_diverging.rs:30:1: 30:2
+ }
+
+ bb5 (cleanup): {
+ drop(_2) -> bb6; // scope 1 at $DIR/inline_diverging.rs:30:1: 30:2
+ }
+
+ bb6 (cleanup): {
+ resume; // scope 1 at $DIR/inline_diverging.rs:26:1: 30:2
}
}

35
src/test/mir-opt/separate_const_switch.identity.SeparateConstSwitch.diff
View file

@ -22,9 +22,6 @@
let mut _18: i32; // in scope 8 at $SRC_DIR/core/src/result.rs:LL:COL
scope 9 {
debug e => _16; // in scope 9 at $SRC_DIR/core/src/result.rs:LL:COL
scope 10 (inlined <i32 as From<i32>>::from) { // at $SRC_DIR/core/src/result.rs:LL:COL
debug t => _18; // in scope 10 at $SRC_DIR/core/src/convert/mod.rs:LL:COL
}
}
}
}
@ -95,18 +92,11 @@
StorageLive(_17); // scope 9 at $SRC_DIR/core/src/result.rs:LL:COL
StorageLive(_18); // scope 9 at $SRC_DIR/core/src/result.rs:LL:COL
_18 = move _16; // scope 9 at $SRC_DIR/core/src/result.rs:LL:COL
_17 = move _18; // scope 10 at $SRC_DIR/core/src/convert/mod.rs:LL:COL
StorageDead(_18); // scope 9 at $SRC_DIR/core/src/result.rs:LL:COL
Deinit(_0); // scope 9 at $SRC_DIR/core/src/result.rs:LL:COL
((_0 as Err).0: i32) = move _17; // scope 9 at $SRC_DIR/core/src/result.rs:LL:COL
discriminant(_0) = 1; // scope 9 at $SRC_DIR/core/src/result.rs:LL:COL
StorageDead(_17); // scope 9 at $SRC_DIR/core/src/result.rs:LL:COL
StorageDead(_16); // scope 8 at $SRC_DIR/core/src/result.rs:LL:COL
StorageDead(_8); // scope 2 at $DIR/separate_const_switch.rs:+1:9: +1:10
StorageDead(_6); // scope 0 at $DIR/separate_const_switch.rs:+1:9: +1:10
StorageDead(_2); // scope 0 at $DIR/separate_const_switch.rs:+1:10: +1:11
StorageDead(_3); // scope 0 at $DIR/separate_const_switch.rs:+2:1: +2:2
return; // scope 0 at $DIR/separate_const_switch.rs:+2:2: +2:2
- _17 = <i32 as From<i32>>::from(move _18) -> bb8; // scope 9 at $SRC_DIR/core/src/result.rs:LL:COL
+ _17 = <i32 as From<i32>>::from(move _18) -> bb7; // scope 9 at $SRC_DIR/core/src/result.rs:LL:COL
// mir::Constant
// + span: $SRC_DIR/core/src/result.rs:LL:COL
// + literal: Const { ty: fn(i32) -> i32 {<i32 as From<i32>>::from}, val: Value(<ZST>) }
}
- bb5: {
@ -152,5 +142,20 @@
+ _5 = discriminant(_3); // scope 0 at $DIR/separate_const_switch.rs:+1:8: +1:10
+ switchInt(move _5) -> [0_isize: bb1, 1_isize: bb3, otherwise: bb2]; // scope 0 at $DIR/separate_const_switch.rs:+1:8: +1:10
}
- bb8: {
+ bb7: {
StorageDead(_18); // scope 9 at $SRC_DIR/core/src/result.rs:LL:COL
Deinit(_0); // scope 9 at $SRC_DIR/core/src/result.rs:LL:COL
((_0 as Err).0: i32) = move _17; // scope 9 at $SRC_DIR/core/src/result.rs:LL:COL
discriminant(_0) = 1; // scope 9 at $SRC_DIR/core/src/result.rs:LL:COL
StorageDead(_17); // scope 9 at $SRC_DIR/core/src/result.rs:LL:COL
StorageDead(_16); // scope 8 at $SRC_DIR/core/src/result.rs:LL:COL
StorageDead(_8); // scope 2 at $DIR/separate_const_switch.rs:+1:9: +1:10
StorageDead(_6); // scope 0 at $DIR/separate_const_switch.rs:+1:9: +1:10
StorageDead(_2); // scope 0 at $DIR/separate_const_switch.rs:+1:10: +1:11
StorageDead(_3); // scope 0 at $DIR/separate_const_switch.rs:+2:1: +2:2
return; // scope 0 at $DIR/separate_const_switch.rs:+2:2: +2:2
}
}