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Auto merge of #124156 - DianQK:disable-match_branches, r=RalfJung
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Disable SimplifyToExp in MatchBranchSimplification Due to the miscompilation mentioned in #124150, We need to disable MatchBranchSimplification temporarily. To fully resolve this issue, my plan is: 1. Disable SimplifyToExp in MatchBranchSimplification (this PR). 2. Remove all potentially unclear transforms in #124122. 3. Gradually add back the removed transforms (possibly multiple PRs). r? `@Nilstrieb` or `@oli-obk`
This commit is contained in:
commit
a61b14d15e
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@ -41,7 +41,10 @@ fn run_pass(&self, tcx: TyCtxt<'tcx>, body: &mut Body<'tcx>) {
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should_cleanup = true;
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continue;
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}
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if SimplifyToExp::default().simplify(tcx, body, bb_idx, param_env).is_some() {
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// unsound: https://github.com/rust-lang/rust/issues/124150
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if tcx.sess.opts.unstable_opts.unsound_mir_opts
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&& SimplifyToExp::default().simplify(tcx, body, bb_idx, param_env).is_some()
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{
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should_cleanup = true;
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continue;
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}
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@ -5,42 +5,37 @@
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debug i => _1;
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let mut _0: u128;
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let mut _2: i128;
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+ let mut _3: i128;
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bb0: {
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_2 = discriminant(_1);
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- switchInt(move _2) -> [1: bb3, 2: bb4, 3: bb5, 340282366920938463463374607431768211455: bb2, otherwise: bb1];
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- }
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-
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- bb1: {
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- unreachable;
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- }
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-
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- bb2: {
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- _0 = const core::num::<impl u128>::MAX;
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- goto -> bb6;
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- }
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-
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- bb3: {
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- _0 = const 1_u128;
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- goto -> bb6;
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- }
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-
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- bb4: {
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- _0 = const 2_u128;
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- goto -> bb6;
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- }
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-
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- bb5: {
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- _0 = const 3_u128;
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- goto -> bb6;
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- }
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-
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- bb6: {
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+ StorageLive(_3);
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+ _3 = move _2;
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+ _0 = _3 as u128 (IntToInt);
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+ StorageDead(_3);
|
||||
switchInt(move _2) -> [1: bb3, 2: bb4, 3: bb5, 340282366920938463463374607431768211455: bb2, otherwise: bb1];
|
||||
}
|
||||
|
||||
bb1: {
|
||||
unreachable;
|
||||
}
|
||||
|
||||
bb2: {
|
||||
_0 = const core::num::<impl u128>::MAX;
|
||||
goto -> bb6;
|
||||
}
|
||||
|
||||
bb3: {
|
||||
_0 = const 1_u128;
|
||||
goto -> bb6;
|
||||
}
|
||||
|
||||
bb4: {
|
||||
_0 = const 2_u128;
|
||||
goto -> bb6;
|
||||
}
|
||||
|
||||
bb5: {
|
||||
_0 = const 3_u128;
|
||||
goto -> bb6;
|
||||
}
|
||||
|
||||
bb6: {
|
||||
return;
|
||||
}
|
||||
}
|
||||
|
|
|
@ -5,37 +5,32 @@
|
|||
debug i => _1;
|
||||
let mut _0: i8;
|
||||
let mut _2: i16;
|
||||
+ let mut _3: i16;
|
||||
|
||||
bb0: {
|
||||
_2 = discriminant(_1);
|
||||
- switchInt(move _2) -> [65535: bb3, 2: bb4, 65533: bb2, otherwise: bb1];
|
||||
- }
|
||||
-
|
||||
- bb1: {
|
||||
- unreachable;
|
||||
- }
|
||||
-
|
||||
- bb2: {
|
||||
- _0 = const -3_i8;
|
||||
- goto -> bb5;
|
||||
- }
|
||||
-
|
||||
- bb3: {
|
||||
- _0 = const -1_i8;
|
||||
- goto -> bb5;
|
||||
- }
|
||||
-
|
||||
- bb4: {
|
||||
- _0 = const 2_i8;
|
||||
- goto -> bb5;
|
||||
- }
|
||||
-
|
||||
- bb5: {
|
||||
+ StorageLive(_3);
|
||||
+ _3 = move _2;
|
||||
+ _0 = _3 as i8 (IntToInt);
|
||||
+ StorageDead(_3);
|
||||
switchInt(move _2) -> [65535: bb3, 2: bb4, 65533: bb2, otherwise: bb1];
|
||||
}
|
||||
|
||||
bb1: {
|
||||
unreachable;
|
||||
}
|
||||
|
||||
bb2: {
|
||||
_0 = const -3_i8;
|
||||
goto -> bb5;
|
||||
}
|
||||
|
||||
bb3: {
|
||||
_0 = const -1_i8;
|
||||
goto -> bb5;
|
||||
}
|
||||
|
||||
bb4: {
|
||||
_0 = const 2_i8;
|
||||
goto -> bb5;
|
||||
}
|
||||
|
||||
bb5: {
|
||||
return;
|
||||
}
|
||||
}
|
||||
|
|
|
@ -5,37 +5,32 @@
|
|||
debug i => _1;
|
||||
let mut _0: i16;
|
||||
let mut _2: i8;
|
||||
+ let mut _3: i8;
|
||||
|
||||
bb0: {
|
||||
_2 = discriminant(_1);
|
||||
- switchInt(move _2) -> [255: bb3, 2: bb4, 253: bb2, otherwise: bb1];
|
||||
- }
|
||||
-
|
||||
- bb1: {
|
||||
- unreachable;
|
||||
- }
|
||||
-
|
||||
- bb2: {
|
||||
- _0 = const -3_i16;
|
||||
- goto -> bb5;
|
||||
- }
|
||||
-
|
||||
- bb3: {
|
||||
- _0 = const -1_i16;
|
||||
- goto -> bb5;
|
||||
- }
|
||||
-
|
||||
- bb4: {
|
||||
- _0 = const 2_i16;
|
||||
- goto -> bb5;
|
||||
- }
|
||||
-
|
||||
- bb5: {
|
||||
+ StorageLive(_3);
|
||||
+ _3 = move _2;
|
||||
+ _0 = _3 as i16 (IntToInt);
|
||||
+ StorageDead(_3);
|
||||
switchInt(move _2) -> [255: bb3, 2: bb4, 253: bb2, otherwise: bb1];
|
||||
}
|
||||
|
||||
bb1: {
|
||||
unreachable;
|
||||
}
|
||||
|
||||
bb2: {
|
||||
_0 = const -3_i16;
|
||||
goto -> bb5;
|
||||
}
|
||||
|
||||
bb3: {
|
||||
_0 = const -1_i16;
|
||||
goto -> bb5;
|
||||
}
|
||||
|
||||
bb4: {
|
||||
_0 = const 2_i16;
|
||||
goto -> bb5;
|
||||
}
|
||||
|
||||
bb5: {
|
||||
return;
|
||||
}
|
||||
}
|
||||
|
|
|
@ -5,32 +5,27 @@
|
|||
debug i => _1;
|
||||
let mut _0: i16;
|
||||
let mut _2: u8;
|
||||
+ let mut _3: u8;
|
||||
|
||||
bb0: {
|
||||
_2 = discriminant(_1);
|
||||
- switchInt(move _2) -> [1: bb3, 2: bb2, otherwise: bb1];
|
||||
- }
|
||||
-
|
||||
- bb1: {
|
||||
- unreachable;
|
||||
- }
|
||||
-
|
||||
- bb2: {
|
||||
- _0 = const 2_i16;
|
||||
- goto -> bb4;
|
||||
- }
|
||||
-
|
||||
- bb3: {
|
||||
- _0 = const 1_i16;
|
||||
- goto -> bb4;
|
||||
- }
|
||||
-
|
||||
- bb4: {
|
||||
+ StorageLive(_3);
|
||||
+ _3 = move _2;
|
||||
+ _0 = _3 as i16 (IntToInt);
|
||||
+ StorageDead(_3);
|
||||
switchInt(move _2) -> [1: bb3, 2: bb2, otherwise: bb1];
|
||||
}
|
||||
|
||||
bb1: {
|
||||
unreachable;
|
||||
}
|
||||
|
||||
bb2: {
|
||||
_0 = const 2_i16;
|
||||
goto -> bb4;
|
||||
}
|
||||
|
||||
bb3: {
|
||||
_0 = const 1_i16;
|
||||
goto -> bb4;
|
||||
}
|
||||
|
||||
bb4: {
|
||||
return;
|
||||
}
|
||||
}
|
||||
|
|
|
@ -5,37 +5,32 @@
|
|||
debug i => _1;
|
||||
let mut _0: u16;
|
||||
let mut _2: u8;
|
||||
+ let mut _3: u8;
|
||||
|
||||
bb0: {
|
||||
_2 = discriminant(_1);
|
||||
- switchInt(move _2) -> [1: bb3, 2: bb4, 5: bb2, otherwise: bb1];
|
||||
- }
|
||||
-
|
||||
- bb1: {
|
||||
- unreachable;
|
||||
- }
|
||||
-
|
||||
- bb2: {
|
||||
- _0 = const 5_u16;
|
||||
- goto -> bb5;
|
||||
- }
|
||||
-
|
||||
- bb3: {
|
||||
- _0 = const 1_u16;
|
||||
- goto -> bb5;
|
||||
- }
|
||||
-
|
||||
- bb4: {
|
||||
- _0 = const 2_u16;
|
||||
- goto -> bb5;
|
||||
- }
|
||||
-
|
||||
- bb5: {
|
||||
+ StorageLive(_3);
|
||||
+ _3 = move _2;
|
||||
+ _0 = _3 as u16 (IntToInt);
|
||||
+ StorageDead(_3);
|
||||
switchInt(move _2) -> [1: bb3, 2: bb4, 5: bb2, otherwise: bb1];
|
||||
}
|
||||
|
||||
bb1: {
|
||||
unreachable;
|
||||
}
|
||||
|
||||
bb2: {
|
||||
_0 = const 5_u16;
|
||||
goto -> bb5;
|
||||
}
|
||||
|
||||
bb3: {
|
||||
_0 = const 1_u16;
|
||||
goto -> bb5;
|
||||
}
|
||||
|
||||
bb4: {
|
||||
_0 = const 2_u16;
|
||||
goto -> bb5;
|
||||
}
|
||||
|
||||
bb5: {
|
||||
return;
|
||||
}
|
||||
}
|
||||
|
|
|
@ -75,9 +75,7 @@ enum EnumAu8 {
|
|||
// EMIT_MIR matches_reduce_branches.match_u8_i16.MatchBranchSimplification.diff
|
||||
fn match_u8_i16(i: EnumAu8) -> i16 {
|
||||
// CHECK-LABEL: fn match_u8_i16(
|
||||
// CHECK-NOT: switchInt
|
||||
// CHECK: _0 = _3 as i16 (IntToInt);
|
||||
// CHECH: return
|
||||
// CHECK: switchInt
|
||||
match i {
|
||||
EnumAu8::A => 1,
|
||||
EnumAu8::B => 2,
|
||||
|
@ -146,9 +144,7 @@ enum EnumBu8 {
|
|||
// EMIT_MIR matches_reduce_branches.match_u8_u16.MatchBranchSimplification.diff
|
||||
fn match_u8_u16(i: EnumBu8) -> u16 {
|
||||
// CHECK-LABEL: fn match_u8_u16(
|
||||
// CHECK-NOT: switchInt
|
||||
// CHECK: _0 = _3 as u16 (IntToInt);
|
||||
// CHECH: return
|
||||
// CHECK: switchInt
|
||||
match i {
|
||||
EnumBu8::A => 1,
|
||||
EnumBu8::B => 2,
|
||||
|
@ -204,9 +200,7 @@ enum EnumAi8 {
|
|||
// EMIT_MIR matches_reduce_branches.match_i8_i16.MatchBranchSimplification.diff
|
||||
fn match_i8_i16(i: EnumAi8) -> i16 {
|
||||
// CHECK-LABEL: fn match_i8_i16(
|
||||
// CHECK-NOT: switchInt
|
||||
// CHECK: _0 = _3 as i16 (IntToInt);
|
||||
// CHECH: return
|
||||
// CHECK: switchInt
|
||||
match i {
|
||||
EnumAi8::A => -1,
|
||||
EnumAi8::B => 2,
|
||||
|
@ -235,9 +229,7 @@ enum EnumAi16 {
|
|||
// EMIT_MIR matches_reduce_branches.match_i16_i8.MatchBranchSimplification.diff
|
||||
fn match_i16_i8(i: EnumAi16) -> i8 {
|
||||
// CHECK-LABEL: fn match_i16_i8(
|
||||
// CHECK-NOT: switchInt
|
||||
// CHECK: _0 = _3 as i8 (IntToInt);
|
||||
// CHECH: return
|
||||
// CHECK: switchInt
|
||||
match i {
|
||||
EnumAi16::A => -1,
|
||||
EnumAi16::B => 2,
|
||||
|
@ -256,9 +248,7 @@ enum EnumAi128 {
|
|||
// EMIT_MIR matches_reduce_branches.match_i128_u128.MatchBranchSimplification.diff
|
||||
fn match_i128_u128(i: EnumAi128) -> u128 {
|
||||
// CHECK-LABEL: fn match_i128_u128(
|
||||
// CHECK-NOT: switchInt
|
||||
// CHECK: _0 = _3 as u128 (IntToInt);
|
||||
// CHECH: return
|
||||
// CHECK: switchInt
|
||||
match i {
|
||||
EnumAi128::A => 1,
|
||||
EnumAi128::B => 2,
|
||||
|
|
|
@ -5,32 +5,27 @@
|
|||
debug e => _1;
|
||||
let mut _0: u8;
|
||||
let mut _2: isize;
|
||||
+ let mut _3: isize;
|
||||
|
||||
bb0: {
|
||||
_2 = discriminant(_1);
|
||||
- switchInt(move _2) -> [0: bb3, 1: bb2, otherwise: bb1];
|
||||
- }
|
||||
-
|
||||
- bb1: {
|
||||
- unreachable;
|
||||
- }
|
||||
-
|
||||
- bb2: {
|
||||
- _0 = const 1_u8;
|
||||
- goto -> bb4;
|
||||
- }
|
||||
-
|
||||
- bb3: {
|
||||
- _0 = const 0_u8;
|
||||
- goto -> bb4;
|
||||
- }
|
||||
-
|
||||
- bb4: {
|
||||
+ StorageLive(_3);
|
||||
+ _3 = move _2;
|
||||
+ _0 = _3 as u8 (IntToInt);
|
||||
+ StorageDead(_3);
|
||||
switchInt(move _2) -> [0: bb3, 1: bb2, otherwise: bb1];
|
||||
}
|
||||
|
||||
bb1: {
|
||||
unreachable;
|
||||
}
|
||||
|
||||
bb2: {
|
||||
_0 = const 1_u8;
|
||||
goto -> bb4;
|
||||
}
|
||||
|
||||
bb3: {
|
||||
_0 = const 0_u8;
|
||||
goto -> bb4;
|
||||
}
|
||||
|
||||
bb4: {
|
||||
return;
|
||||
}
|
||||
}
|
||||
|
|
|
@ -5,32 +5,27 @@
|
|||
debug e => _1;
|
||||
let mut _0: i8;
|
||||
let mut _2: isize;
|
||||
+ let mut _3: isize;
|
||||
|
||||
bb0: {
|
||||
_2 = discriminant(_1);
|
||||
- switchInt(move _2) -> [0: bb3, 1: bb2, otherwise: bb1];
|
||||
- }
|
||||
-
|
||||
- bb1: {
|
||||
- unreachable;
|
||||
- }
|
||||
-
|
||||
- bb2: {
|
||||
- _0 = const 1_i8;
|
||||
- goto -> bb4;
|
||||
- }
|
||||
-
|
||||
- bb3: {
|
||||
- _0 = const 0_i8;
|
||||
- goto -> bb4;
|
||||
- }
|
||||
-
|
||||
- bb4: {
|
||||
+ StorageLive(_3);
|
||||
+ _3 = move _2;
|
||||
+ _0 = _3 as i8 (IntToInt);
|
||||
+ StorageDead(_3);
|
||||
switchInt(move _2) -> [0: bb3, 1: bb2, otherwise: bb1];
|
||||
}
|
||||
|
||||
bb1: {
|
||||
unreachable;
|
||||
}
|
||||
|
||||
bb2: {
|
||||
_0 = const 1_i8;
|
||||
goto -> bb4;
|
||||
}
|
||||
|
||||
bb3: {
|
||||
_0 = const 0_i8;
|
||||
goto -> bb4;
|
||||
}
|
||||
|
||||
bb4: {
|
||||
return;
|
||||
}
|
||||
}
|
||||
|
|
Loading…
Reference in New Issue
Block a user