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//@ compile-flags: -Zunsound-mir-opts
// FIXME: see <https://github.com/rust-lang/rust/issues/132353.
//@ test-mir-pass: GVN
//@ compile-flags: -Cpanic=abort
#![feature(core_intrinsics, custom_mir)]
#![allow(internal_features)]
use std::intrinsics::mir::*;
struct AllCopy {
a: i32,
b: u64,
c: [i8; 3],
}
// EMIT_MIR gvn_copy_aggregate.all_copy.GVN.diff
fn all_copy(v: &AllCopy) -> AllCopy {
// CHECK-LABEL: fn all_copy(
// CHECK: bb0: {
// CHECK-NOT: = AllCopy { {{.*}} };
// CHECK: _0 = copy (*_1);
let a = v.a;
let b = v.b;
let c = v.c;
AllCopy { a, b, c }
}
// EMIT_MIR gvn_copy_aggregate.all_copy_2.GVN.diff
fn all_copy_2(v: &&AllCopy) -> AllCopy {
// CHECK-LABEL: fn all_copy_2(
// CHECK: bb0: {
// CHECK-NOT: = AllCopy { {{.*}} };
// CHECK: [[V1:_.*]] = copy (*_1);
// CHECK: _0 = copy (*[[V1]]);
let a = v.a;
let b = v.b;
let c = v.c;
AllCopy { a, b, c }
}
// EMIT_MIR gvn_copy_aggregate.all_copy_move.GVN.diff
fn all_copy_move(v: AllCopy) -> AllCopy {
// CHECK-LABEL: fn all_copy_move(
// CHECK: bb0: {
// CHECK-NOT: = AllCopy { {{.*}} };
// CHECK: _0 = copy _1;
let a = v.a;
let b = v.b;
let c = v.c;
AllCopy { a, b, c }
}
// EMIT_MIR gvn_copy_aggregate.all_copy_ret_2.GVN.diff
fn all_copy_ret_2(v: &AllCopy) -> (AllCopy, AllCopy) {
// CHECK-LABEL: fn all_copy_ret_2(
// CHECK: bb0: {
// CHECK-NOT: = AllCopy { {{.*}} };
// CHECK: [[V1:_.*]] = copy (*_1);
// CHECK: [[V2:_.*]] = copy [[V1]];
// CHECK: _0 = (copy [[V1]], copy [[V1]]);
let a = v.a;
let b = v.b;
let c = v.c;
(AllCopy { a, b, c }, AllCopy { a, b, c })
}
struct AllCopy2 {
a: i32,
b: u64,
c: [i8; 3],
}
// EMIT_MIR gvn_copy_aggregate.all_copy_different_type.GVN.diff
fn all_copy_different_type(v: &AllCopy) -> AllCopy2 {
// CHECK-LABEL: fn all_copy_different_type(
// CHECK: bb0: {
// CHECK: _0 = AllCopy2 { {{.*}} };
let a = v.a;
let b = v.b;
let c = v.c;
AllCopy2 { a, b, c }
}
struct SameType {
a: i32,
b: i32,
}
// EMIT_MIR gvn_copy_aggregate.same_type_different_index.GVN.diff
fn same_type_different_index(v: &SameType) -> SameType {
// CHECK-LABEL: fn same_type_different_index(
// CHECK: bb0: {
// CHECK: _0 = SameType { {{.*}} };
let a = v.b;
let b = v.a;
SameType { a, b }
}
// EMIT_MIR gvn_copy_aggregate.all_copy_has_changed.GVN.diff
fn all_copy_has_changed(v: &mut AllCopy) -> AllCopy {
// CHECK-LABEL: fn all_copy_has_changed(
// CHECK: bb0: {
// CHECK: _0 = AllCopy { {{.*}} };
let a = v.a;
let b = v.b;
let c = v.c;
v.a = 1;
AllCopy { a, b, c }
}
// FIXME: This can be simplified to `Copy`.
// EMIT_MIR gvn_copy_aggregate.all_copy_use_changed.GVN.diff
fn all_copy_use_changed(v: &mut AllCopy) -> AllCopy {
// CHECK-LABEL: fn all_copy_use_changed(
// CHECK: bb0: {
// CHECK-NOT: _0 = copy (*_1);
// CHECK: = AllCopy { {{.*}} };
let mut a = v.a;
v.a = 1;
a = v.a;
let b = v.b;
let c = v.c;
AllCopy { a, b, c }
}
// FIXME: This can be simplified to `Copy`.
// EMIT_MIR gvn_copy_aggregate.all_copy_use_changed_2.GVN.diff
fn all_copy_use_changed_2(v: &mut AllCopy) -> AllCopy {
// CHECK-LABEL: fn all_copy_use_changed_2(
// CHECK: bb0: {
// CHECK-NOT: _0 = (*_1);
// CHECK: = AllCopy { {{.*}} };
let mut a = v.a;
let b = v.b;
let c = v.c;
v.a = 1;
a = v.a;
AllCopy { a, b, c }
}
struct NestCopy {
d: i32,
all_copy: AllCopy,
}
// EMIT_MIR gvn_copy_aggregate.nest_copy.GVN.diff
fn nest_copy(v: &NestCopy) -> NestCopy {
// CHECK-LABEL: fn nest_copy(
// CHECK: bb0: {
// CHECK-NOT: = AllCopy { {{.*}} };
// CHECK-NOT: = NestCopy { {{.*}} };
let a = v.all_copy.a;
let b = v.all_copy.b;
let c = v.all_copy.c;
let all_copy = AllCopy { a, b, c };
let d = v.d;
NestCopy { d, all_copy }
}
enum Enum1 {
A(AllCopy),
B(AllCopy),
}
// EMIT_MIR gvn_copy_aggregate.enum_identical_variant.GVN.diff
fn enum_identical_variant(v: &Enum1) -> Enum1 {
// CHECK-LABEL: fn enum_identical_variant(
// CHECK-NOT: = AllCopy { {{.*}} };
// CHECK: _0 = copy (*_1);
// CHECK-NOT: = AllCopy { {{.*}} };
// CHECK: _0 = copy (*_1);
match v {
Enum1::A(v) => {
let a = v.a;
let b = v.b;
let c = v.c;
let all_copy = AllCopy { a, b, c };
Enum1::A(all_copy)
}
Enum1::B(v) => {
let a = v.a;
let b = v.b;
let c = v.c;
let all_copy = AllCopy { a, b, c };
Enum1::B(all_copy)
}
}
}
// EMIT_MIR gvn_copy_aggregate.enum_different_variant.GVN.diff
fn enum_different_variant(v: &Enum1) -> Enum1 {
// CHECK-LABEL: fn enum_different_variant(
// CHECK-NOT: = AllCopy { {{.*}} };
// CHECK: [[V1:_.*]] = copy (((*_1) as [[VARIANT1:.*]]).0: AllCopy);
// CHECK: _0 = Enum1::[[VARIANT2:.*]](copy [[V1]]);
// CHECK-NOT: = AllCopy { {{.*}} };
// CHECK: [[V2:_.*]] = copy (((*_1) as [[VARIANT2]]).0: AllCopy);
// CHECK: _0 = Enum1::[[VARIANT1]](copy [[V2]]);
match v {
Enum1::A(v) => {
let a = v.a;
let b = v.b;
let c = v.c;
let all_copy = AllCopy { a, b, c };
Enum1::B(all_copy)
}
Enum1::B(v) => {
let a = v.a;
let b = v.b;
let c = v.c;
let all_copy = AllCopy { a, b, c };
Enum1::A(all_copy)
}
}
}
enum AlwaysSome<T> {
Some(T),
}
// Ensure that we do not access this local after `StorageDead`.
// EMIT_MIR gvn_copy_aggregate.remove_storage_dead.GVN.diff
fn remove_storage_dead<T>(f: fn() -> AlwaysSome<T>) -> AlwaysSome<T> {
// CHECK-LABEL: fn remove_storage_dead(
// CHECK: [[V1:_.*]] = copy _1() -> [return: [[BB1:bb.*]],
// CHECK: [[BB1]]: {
// CHECK-NOT: StorageDead([[V1]]);
// CHECK: _0 = copy [[V1]];
let v = {
match f() {
AlwaysSome::Some(v) => v,
}
};
AlwaysSome::Some(v)
}
// EMIT_MIR gvn_copy_aggregate.remove_storage_dead_from_index.GVN.diff
#[custom_mir(dialect = "analysis")]
fn remove_storage_dead_from_index(f: fn() -> usize, v: [SameType; 5]) -> SameType {
// CHECK-LABEL: fn remove_storage_dead_from_index(
// CHECK: [[V1:_.*]] = copy _1() -> [return: [[BB1:bb.*]],
// CHECK: [[BB1]]: {
// CHECK-NOT: StorageDead([[V1]]);
// CHECK-NOT: = SameType { {{.*}} };
// CHECK: _0 = copy _2[[[V1]]];
mir! {
let index: usize;
let a: i32;
let b: i32;
{
StorageLive(index);
Call(index = f(), ReturnTo(bb1), UnwindUnreachable())
}
bb1 = {
a = v[index].a;
b = v[index].b;
StorageDead(index);
RET = SameType { a, b };
Return()
}
}
}
|
