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FileCheck gvn.

This commit is contained in:
Camille GILLOT 2023-10-16 21:44:36 +00:00
parent 50559ceec4
commit ac0228da59
11 changed files with 1638 additions and 1811 deletions
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133
tests/mir-opt/gvn.aggregates.GVN.panic-abort.diff
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@ -1,133 +0,0 @@
- // MIR for `aggregates` before GVN
+ // MIR for `aggregates` after GVN
fn aggregates() -> () {
let mut _0: ();
let _1: S<[u8; 0]>;
let mut _2: [u8; 0];
let mut _4: [u16; 0];
let mut _6: ();
let mut _8: ();
let mut _11: i32;
let mut _12: i32;
let mut _13: i32;
let mut _14: i32;
let mut _15: i32;
let mut _16: i32;
let mut _17: i32;
let mut _18: i32;
let mut _19: i32;
let mut _20: i32;
scope 1 {
debug a_array => _1;
let _3: S<[u16; 0]>;
scope 2 {
debug b_array => _3;
let _5: S<()>;
scope 3 {
debug a_tuple => _5;
let _7: S<()>;
scope 4 {
debug b_tuple => _7;
let _9: i32;
scope 5 {
debug val => _9;
let _10: [i32; 10];
scope 6 {
debug array => _10;
}
}
}
}
}
}
bb0: {
StorageLive(_1);
StorageLive(_2);
- _2 = [];
- _1 = S::<[u8; 0]>(move _2);
+ _2 = const [];
+ _1 = const S::<[u8; 0]>([]);
StorageDead(_2);
StorageLive(_3);
StorageLive(_4);
- _4 = [];
- _3 = S::<[u16; 0]>(move _4);
+ _4 = const [];
+ _3 = const S::<[u16; 0]>([]);
StorageDead(_4);
StorageLive(_5);
- StorageLive(_6);
- _6 = ();
- _5 = S::<()>(move _6);
- StorageDead(_6);
+ nop;
+ _6 = const ();
+ _5 = const S::<()>(());
+ nop;
StorageLive(_7);
StorageLive(_8);
- _8 = ();
- _7 = S::<()>(move _8);
+ _8 = const ();
+ _7 = const S::<()>(());
StorageDead(_8);
- StorageLive(_9);
+ nop;
_9 = const 5_i32;
StorageLive(_10);
StorageLive(_11);
- _11 = _9;
+ _11 = const 5_i32;
StorageLive(_12);
- _12 = _9;
+ _12 = const 5_i32;
StorageLive(_13);
- _13 = _9;
+ _13 = const 5_i32;
StorageLive(_14);
- _14 = _9;
+ _14 = const 5_i32;
StorageLive(_15);
- _15 = _9;
+ _15 = const 5_i32;
StorageLive(_16);
- _16 = _9;
+ _16 = const 5_i32;
StorageLive(_17);
- _17 = _9;
+ _17 = const 5_i32;
StorageLive(_18);
- _18 = _9;
+ _18 = const 5_i32;
StorageLive(_19);
- _19 = _9;
+ _19 = const 5_i32;
StorageLive(_20);
- _20 = _9;
- _10 = [move _11, move _12, move _13, move _14, move _15, move _16, move _17, move _18, move _19, move _20];
+ _20 = const 5_i32;
+ _10 = [const 5_i32; 10];
StorageDead(_20);
StorageDead(_19);
StorageDead(_18);
StorageDead(_17);
StorageDead(_16);
StorageDead(_15);
StorageDead(_14);
StorageDead(_13);
StorageDead(_12);
StorageDead(_11);
_0 = const ();
StorageDead(_10);
- StorageDead(_9);
+ nop;
StorageDead(_7);
StorageDead(_5);
StorageDead(_3);
StorageDead(_1);
return;
}
}

133
tests/mir-opt/gvn.aggregates.GVN.panic-unwind.diff
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@ -1,133 +0,0 @@
- // MIR for `aggregates` before GVN
+ // MIR for `aggregates` after GVN
fn aggregates() -> () {
let mut _0: ();
let _1: S<[u8; 0]>;
let mut _2: [u8; 0];
let mut _4: [u16; 0];
let mut _6: ();
let mut _8: ();
let mut _11: i32;
let mut _12: i32;
let mut _13: i32;
let mut _14: i32;
let mut _15: i32;
let mut _16: i32;
let mut _17: i32;
let mut _18: i32;
let mut _19: i32;
let mut _20: i32;
scope 1 {
debug a_array => _1;
let _3: S<[u16; 0]>;
scope 2 {
debug b_array => _3;
let _5: S<()>;
scope 3 {
debug a_tuple => _5;
let _7: S<()>;
scope 4 {
debug b_tuple => _7;
let _9: i32;
scope 5 {
debug val => _9;
let _10: [i32; 10];
scope 6 {
debug array => _10;
}
}
}
}
}
}
bb0: {
StorageLive(_1);
StorageLive(_2);
- _2 = [];
- _1 = S::<[u8; 0]>(move _2);
+ _2 = const [];
+ _1 = const S::<[u8; 0]>([]);
StorageDead(_2);
StorageLive(_3);
StorageLive(_4);
- _4 = [];
- _3 = S::<[u16; 0]>(move _4);
+ _4 = const [];
+ _3 = const S::<[u16; 0]>([]);
StorageDead(_4);
StorageLive(_5);
- StorageLive(_6);
- _6 = ();
- _5 = S::<()>(move _6);
- StorageDead(_6);
+ nop;
+ _6 = const ();
+ _5 = const S::<()>(());
+ nop;
StorageLive(_7);
StorageLive(_8);
- _8 = ();
- _7 = S::<()>(move _8);
+ _8 = const ();
+ _7 = const S::<()>(());
StorageDead(_8);
- StorageLive(_9);
+ nop;
_9 = const 5_i32;
StorageLive(_10);
StorageLive(_11);
- _11 = _9;
+ _11 = const 5_i32;
StorageLive(_12);
- _12 = _9;
+ _12 = const 5_i32;
StorageLive(_13);
- _13 = _9;
+ _13 = const 5_i32;
StorageLive(_14);
- _14 = _9;
+ _14 = const 5_i32;
StorageLive(_15);
- _15 = _9;
+ _15 = const 5_i32;
StorageLive(_16);
- _16 = _9;
+ _16 = const 5_i32;
StorageLive(_17);
- _17 = _9;
+ _17 = const 5_i32;
StorageLive(_18);
- _18 = _9;
+ _18 = const 5_i32;
StorageLive(_19);
- _19 = _9;
+ _19 = const 5_i32;
StorageLive(_20);
- _20 = _9;
- _10 = [move _11, move _12, move _13, move _14, move _15, move _16, move _17, move _18, move _19, move _20];
+ _20 = const 5_i32;
+ _10 = [const 5_i32; 10];
StorageDead(_20);
StorageDead(_19);
StorageDead(_18);
StorageDead(_17);
StorageDead(_16);
StorageDead(_15);
StorageDead(_14);
StorageDead(_13);
StorageDead(_12);
StorageDead(_11);
_0 = const ();
StorageDead(_10);
- StorageDead(_9);
+ nop;
StorageDead(_7);
StorageDead(_5);
StorageDead(_3);
StorageDead(_1);
return;
}
}

294
tests/mir-opt/gvn.arithmetic_checked.GVN.panic-abort.diff
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@ -20,57 +20,6 @@
let mut _15: u64;
let mut _16: u64;
let mut _17: (u64, bool);
let _18: ();
let mut _19: u64;
let mut _20: u64;
let mut _21: bool;
let _22: ();
let mut _23: u64;
let mut _24: u64;
let mut _25: bool;
let _26: ();
let mut _27: u64;
let mut _28: u64;
let mut _29: bool;
let _30: ();
let mut _31: u64;
let mut _32: u64;
let mut _33: bool;
let _34: ();
let mut _35: u64;
let mut _36: u64;
let mut _37: bool;
let _38: ();
let mut _39: u64;
let mut _40: u64;
let mut _41: bool;
let _42: ();
let mut _43: u64;
let mut _44: u64;
let mut _45: bool;
let _46: ();
let mut _47: u64;
let mut _48: u64;
let mut _49: bool;
let _50: ();
let mut _51: u64;
let mut _52: u64;
let _53: ();
let mut _54: u64;
let mut _55: u64;
let _56: ();
let mut _57: u64;
let mut _58: u64;
let _59: ();
let mut _60: u64;
let mut _61: u64;
let mut _62: u32;
let mut _63: bool;
let _64: ();
let mut _65: u64;
let mut _66: u64;
let mut _67: u32;
let mut _68: bool;
bb0: {
StorageLive(_2);
@ -149,249 +98,6 @@
bb8: {
StorageDead(_15);
StorageDead(_14);
StorageLive(_18);
StorageLive(_19);
StorageLive(_20);
_20 = _1;
- _21 = Eq(const 0_u64, const 0_u64);
- assert(!move _21, "attempt to divide `{}` by zero", _20) -> [success: bb9, unwind unreachable];
+ _21 = const true;
+ assert(!const true, "attempt to divide `{}` by zero", _1) -> [success: bb9, unwind unreachable];
}
bb9: {
- _19 = Div(move _20, const 0_u64);
+ _19 = Div(_1, const 0_u64);
StorageDead(_20);
_18 = opaque::<u64>(move _19) -> [return: bb10, unwind unreachable];
}
bb10: {
StorageDead(_19);
StorageDead(_18);
StorageLive(_22);
StorageLive(_23);
StorageLive(_24);
_24 = _1;
- _25 = Eq(const 1_u64, const 0_u64);
- assert(!move _25, "attempt to divide `{}` by zero", _24) -> [success: bb11, unwind unreachable];
+ _25 = const false;
+ assert(!const false, "attempt to divide `{}` by zero", _1) -> [success: bb11, unwind unreachable];
}
bb11: {
- _23 = Div(move _24, const 1_u64);
+ _23 = Div(_1, const 1_u64);
StorageDead(_24);
_22 = opaque::<u64>(move _23) -> [return: bb12, unwind unreachable];
}
bb12: {
StorageDead(_23);
StorageDead(_22);
StorageLive(_26);
StorageLive(_27);
StorageLive(_28);
_28 = _1;
- _29 = Eq(_28, const 0_u64);
- assert(!move _29, "attempt to divide `{}` by zero", const 0_u64) -> [success: bb13, unwind unreachable];
+ _29 = Eq(_1, const 0_u64);
+ assert(!_29, "attempt to divide `{}` by zero", const 0_u64) -> [success: bb13, unwind unreachable];
}
bb13: {
- _27 = Div(const 0_u64, move _28);
+ _27 = Div(const 0_u64, _1);
StorageDead(_28);
_26 = opaque::<u64>(move _27) -> [return: bb14, unwind unreachable];
}
bb14: {
StorageDead(_27);
StorageDead(_26);
StorageLive(_30);
StorageLive(_31);
StorageLive(_32);
_32 = _1;
- _33 = Eq(_32, const 0_u64);
- assert(!move _33, "attempt to divide `{}` by zero", const 1_u64) -> [success: bb15, unwind unreachable];
+ _33 = _29;
+ assert(!_29, "attempt to divide `{}` by zero", const 1_u64) -> [success: bb15, unwind unreachable];
}
bb15: {
- _31 = Div(const 1_u64, move _32);
+ _31 = Div(const 1_u64, _1);
StorageDead(_32);
_30 = opaque::<u64>(move _31) -> [return: bb16, unwind unreachable];
}
bb16: {
StorageDead(_31);
StorageDead(_30);
StorageLive(_34);
StorageLive(_35);
StorageLive(_36);
_36 = _1;
- _37 = Eq(const 0_u64, const 0_u64);
- assert(!move _37, "attempt to calculate the remainder of `{}` with a divisor of zero", _36) -> [success: bb17, unwind unreachable];
+ _37 = const true;
+ assert(!const true, "attempt to calculate the remainder of `{}` with a divisor of zero", _1) -> [success: bb17, unwind unreachable];
}
bb17: {
- _35 = Rem(move _36, const 0_u64);
+ _35 = Rem(_1, const 0_u64);
StorageDead(_36);
_34 = opaque::<u64>(move _35) -> [return: bb18, unwind unreachable];
}
bb18: {
StorageDead(_35);
StorageDead(_34);
StorageLive(_38);
StorageLive(_39);
StorageLive(_40);
_40 = _1;
- _41 = Eq(const 1_u64, const 0_u64);
- assert(!move _41, "attempt to calculate the remainder of `{}` with a divisor of zero", _40) -> [success: bb19, unwind unreachable];
+ _41 = const false;
+ assert(!const false, "attempt to calculate the remainder of `{}` with a divisor of zero", _1) -> [success: bb19, unwind unreachable];
}
bb19: {
- _39 = Rem(move _40, const 1_u64);
+ _39 = Rem(_1, const 1_u64);
StorageDead(_40);
_38 = opaque::<u64>(move _39) -> [return: bb20, unwind unreachable];
}
bb20: {
StorageDead(_39);
StorageDead(_38);
StorageLive(_42);
StorageLive(_43);
StorageLive(_44);
_44 = _1;
- _45 = Eq(_44, const 0_u64);
- assert(!move _45, "attempt to calculate the remainder of `{}` with a divisor of zero", const 0_u64) -> [success: bb21, unwind unreachable];
+ _45 = _29;
+ assert(!_29, "attempt to calculate the remainder of `{}` with a divisor of zero", const 0_u64) -> [success: bb21, unwind unreachable];
}
bb21: {
- _43 = Rem(const 0_u64, move _44);
+ _43 = Rem(const 0_u64, _1);
StorageDead(_44);
_42 = opaque::<u64>(move _43) -> [return: bb22, unwind unreachable];
}
bb22: {
StorageDead(_43);
StorageDead(_42);
StorageLive(_46);
StorageLive(_47);
StorageLive(_48);
_48 = _1;
- _49 = Eq(_48, const 0_u64);
- assert(!move _49, "attempt to calculate the remainder of `{}` with a divisor of zero", const 1_u64) -> [success: bb23, unwind unreachable];
+ _49 = _29;
+ assert(!_29, "attempt to calculate the remainder of `{}` with a divisor of zero", const 1_u64) -> [success: bb23, unwind unreachable];
}
bb23: {
- _47 = Rem(const 1_u64, move _48);
+ _47 = Rem(const 1_u64, _1);
StorageDead(_48);
_46 = opaque::<u64>(move _47) -> [return: bb24, unwind unreachable];
}
bb24: {
StorageDead(_47);
StorageDead(_46);
StorageLive(_50);
StorageLive(_51);
StorageLive(_52);
_52 = _1;
- _51 = BitAnd(move _52, const 0_u64);
+ _51 = BitAnd(_1, const 0_u64);
StorageDead(_52);
_50 = opaque::<u64>(move _51) -> [return: bb25, unwind unreachable];
}
bb25: {
StorageDead(_51);
StorageDead(_50);
StorageLive(_53);
StorageLive(_54);
StorageLive(_55);
_55 = _1;
- _54 = BitOr(move _55, const 0_u64);
+ _54 = BitOr(_1, const 0_u64);
StorageDead(_55);
_53 = opaque::<u64>(move _54) -> [return: bb26, unwind unreachable];
}
bb26: {
StorageDead(_54);
StorageDead(_53);
StorageLive(_56);
StorageLive(_57);
StorageLive(_58);
_58 = _1;
- _57 = BitXor(move _58, const 0_u64);
+ _57 = BitXor(_1, const 0_u64);
StorageDead(_58);
_56 = opaque::<u64>(move _57) -> [return: bb27, unwind unreachable];
}
bb27: {
StorageDead(_57);
StorageDead(_56);
StorageLive(_59);
StorageLive(_60);
StorageLive(_61);
_61 = _1;
- _62 = const 0_i32 as u32 (IntToInt);
- _63 = Lt(move _62, const 64_u32);
- assert(move _63, "attempt to shift right by `{}`, which would overflow", const 0_i32) -> [success: bb28, unwind unreachable];
+ _62 = const 0_u32;
+ _63 = const true;
+ assert(const true, "attempt to shift right by `{}`, which would overflow", const 0_i32) -> [success: bb28, unwind unreachable];
}
bb28: {
- _60 = Shr(move _61, const 0_i32);
+ _60 = Shr(_1, const 0_i32);
StorageDead(_61);
_59 = opaque::<u64>(move _60) -> [return: bb29, unwind unreachable];
}
bb29: {
StorageDead(_60);
StorageDead(_59);
StorageLive(_64);
StorageLive(_65);
StorageLive(_66);
_66 = _1;
- _67 = const 0_i32 as u32 (IntToInt);
- _68 = Lt(move _67, const 64_u32);
- assert(move _68, "attempt to shift left by `{}`, which would overflow", const 0_i32) -> [success: bb30, unwind unreachable];
+ _67 = const 0_u32;
+ _68 = const true;
+ assert(const true, "attempt to shift left by `{}`, which would overflow", const 0_i32) -> [success: bb30, unwind unreachable];
}
bb30: {
- _65 = Shl(move _66, const 0_i32);
+ _65 = Shl(_1, const 0_i32);
StorageDead(_66);
_64 = opaque::<u64>(move _65) -> [return: bb31, unwind unreachable];
}
bb31: {
StorageDead(_65);
StorageDead(_64);
_0 = const ();
return;
}

294
tests/mir-opt/gvn.arithmetic_checked.GVN.panic-unwind.diff
View File

@ -20,57 +20,6 @@
let mut _15: u64;
let mut _16: u64;
let mut _17: (u64, bool);
let _18: ();
let mut _19: u64;
let mut _20: u64;
let mut _21: bool;
let _22: ();
let mut _23: u64;
let mut _24: u64;
let mut _25: bool;
let _26: ();
let mut _27: u64;
let mut _28: u64;
let mut _29: bool;
let _30: ();
let mut _31: u64;
let mut _32: u64;
let mut _33: bool;
let _34: ();
let mut _35: u64;
let mut _36: u64;
let mut _37: bool;
let _38: ();
let mut _39: u64;
let mut _40: u64;
let mut _41: bool;
let _42: ();
let mut _43: u64;
let mut _44: u64;
let mut _45: bool;
let _46: ();
let mut _47: u64;
let mut _48: u64;
let mut _49: bool;
let _50: ();
let mut _51: u64;
let mut _52: u64;
let _53: ();
let mut _54: u64;
let mut _55: u64;
let _56: ();
let mut _57: u64;
let mut _58: u64;
let _59: ();
let mut _60: u64;
let mut _61: u64;
let mut _62: u32;
let mut _63: bool;
let _64: ();
let mut _65: u64;
let mut _66: u64;
let mut _67: u32;
let mut _68: bool;
bb0: {
StorageLive(_2);
@ -149,249 +98,6 @@
bb8: {
StorageDead(_15);
StorageDead(_14);
StorageLive(_18);
StorageLive(_19);
StorageLive(_20);
_20 = _1;
- _21 = Eq(const 0_u64, const 0_u64);
- assert(!move _21, "attempt to divide `{}` by zero", _20) -> [success: bb9, unwind continue];
+ _21 = const true;
+ assert(!const true, "attempt to divide `{}` by zero", _1) -> [success: bb9, unwind continue];
}
bb9: {
- _19 = Div(move _20, const 0_u64);
+ _19 = Div(_1, const 0_u64);
StorageDead(_20);
_18 = opaque::<u64>(move _19) -> [return: bb10, unwind continue];
}
bb10: {
StorageDead(_19);
StorageDead(_18);
StorageLive(_22);
StorageLive(_23);
StorageLive(_24);
_24 = _1;
- _25 = Eq(const 1_u64, const 0_u64);
- assert(!move _25, "attempt to divide `{}` by zero", _24) -> [success: bb11, unwind continue];
+ _25 = const false;
+ assert(!const false, "attempt to divide `{}` by zero", _1) -> [success: bb11, unwind continue];
}
bb11: {
- _23 = Div(move _24, const 1_u64);
+ _23 = Div(_1, const 1_u64);
StorageDead(_24);
_22 = opaque::<u64>(move _23) -> [return: bb12, unwind continue];
}
bb12: {
StorageDead(_23);
StorageDead(_22);
StorageLive(_26);
StorageLive(_27);
StorageLive(_28);
_28 = _1;
- _29 = Eq(_28, const 0_u64);
- assert(!move _29, "attempt to divide `{}` by zero", const 0_u64) -> [success: bb13, unwind continue];
+ _29 = Eq(_1, const 0_u64);
+ assert(!_29, "attempt to divide `{}` by zero", const 0_u64) -> [success: bb13, unwind continue];
}
bb13: {
- _27 = Div(const 0_u64, move _28);
+ _27 = Div(const 0_u64, _1);
StorageDead(_28);
_26 = opaque::<u64>(move _27) -> [return: bb14, unwind continue];
}
bb14: {
StorageDead(_27);
StorageDead(_26);
StorageLive(_30);
StorageLive(_31);
StorageLive(_32);
_32 = _1;
- _33 = Eq(_32, const 0_u64);
- assert(!move _33, "attempt to divide `{}` by zero", const 1_u64) -> [success: bb15, unwind continue];
+ _33 = _29;
+ assert(!_29, "attempt to divide `{}` by zero", const 1_u64) -> [success: bb15, unwind continue];
}
bb15: {
- _31 = Div(const 1_u64, move _32);
+ _31 = Div(const 1_u64, _1);
StorageDead(_32);
_30 = opaque::<u64>(move _31) -> [return: bb16, unwind continue];
}
bb16: {
StorageDead(_31);
StorageDead(_30);
StorageLive(_34);
StorageLive(_35);
StorageLive(_36);
_36 = _1;
- _37 = Eq(const 0_u64, const 0_u64);
- assert(!move _37, "attempt to calculate the remainder of `{}` with a divisor of zero", _36) -> [success: bb17, unwind continue];
+ _37 = const true;
+ assert(!const true, "attempt to calculate the remainder of `{}` with a divisor of zero", _1) -> [success: bb17, unwind continue];
}
bb17: {
- _35 = Rem(move _36, const 0_u64);
+ _35 = Rem(_1, const 0_u64);
StorageDead(_36);
_34 = opaque::<u64>(move _35) -> [return: bb18, unwind continue];
}
bb18: {
StorageDead(_35);
StorageDead(_34);
StorageLive(_38);
StorageLive(_39);
StorageLive(_40);
_40 = _1;
- _41 = Eq(const 1_u64, const 0_u64);
- assert(!move _41, "attempt to calculate the remainder of `{}` with a divisor of zero", _40) -> [success: bb19, unwind continue];
+ _41 = const false;
+ assert(!const false, "attempt to calculate the remainder of `{}` with a divisor of zero", _1) -> [success: bb19, unwind continue];
}
bb19: {
- _39 = Rem(move _40, const 1_u64);
+ _39 = Rem(_1, const 1_u64);
StorageDead(_40);
_38 = opaque::<u64>(move _39) -> [return: bb20, unwind continue];
}
bb20: {
StorageDead(_39);
StorageDead(_38);
StorageLive(_42);
StorageLive(_43);
StorageLive(_44);
_44 = _1;
- _45 = Eq(_44, const 0_u64);
- assert(!move _45, "attempt to calculate the remainder of `{}` with a divisor of zero", const 0_u64) -> [success: bb21, unwind continue];
+ _45 = _29;
+ assert(!_29, "attempt to calculate the remainder of `{}` with a divisor of zero", const 0_u64) -> [success: bb21, unwind continue];
}
bb21: {
- _43 = Rem(const 0_u64, move _44);
+ _43 = Rem(const 0_u64, _1);
StorageDead(_44);
_42 = opaque::<u64>(move _43) -> [return: bb22, unwind continue];
}
bb22: {
StorageDead(_43);
StorageDead(_42);
StorageLive(_46);
StorageLive(_47);
StorageLive(_48);
_48 = _1;
- _49 = Eq(_48, const 0_u64);
- assert(!move _49, "attempt to calculate the remainder of `{}` with a divisor of zero", const 1_u64) -> [success: bb23, unwind continue];
+ _49 = _29;
+ assert(!_29, "attempt to calculate the remainder of `{}` with a divisor of zero", const 1_u64) -> [success: bb23, unwind continue];
}
bb23: {
- _47 = Rem(const 1_u64, move _48);
+ _47 = Rem(const 1_u64, _1);
StorageDead(_48);
_46 = opaque::<u64>(move _47) -> [return: bb24, unwind continue];
}
bb24: {
StorageDead(_47);
StorageDead(_46);
StorageLive(_50);
StorageLive(_51);
StorageLive(_52);
_52 = _1;
- _51 = BitAnd(move _52, const 0_u64);
+ _51 = BitAnd(_1, const 0_u64);
StorageDead(_52);
_50 = opaque::<u64>(move _51) -> [return: bb25, unwind continue];
}
bb25: {
StorageDead(_51);
StorageDead(_50);
StorageLive(_53);
StorageLive(_54);
StorageLive(_55);
_55 = _1;
- _54 = BitOr(move _55, const 0_u64);
+ _54 = BitOr(_1, const 0_u64);
StorageDead(_55);
_53 = opaque::<u64>(move _54) -> [return: bb26, unwind continue];
}
bb26: {
StorageDead(_54);
StorageDead(_53);
StorageLive(_56);
StorageLive(_57);
StorageLive(_58);
_58 = _1;
- _57 = BitXor(move _58, const 0_u64);
+ _57 = BitXor(_1, const 0_u64);
StorageDead(_58);
_56 = opaque::<u64>(move _57) -> [return: bb27, unwind continue];
}
bb27: {
StorageDead(_57);
StorageDead(_56);
StorageLive(_59);
StorageLive(_60);
StorageLive(_61);
_61 = _1;
- _62 = const 0_i32 as u32 (IntToInt);
- _63 = Lt(move _62, const 64_u32);
- assert(move _63, "attempt to shift right by `{}`, which would overflow", const 0_i32) -> [success: bb28, unwind continue];
+ _62 = const 0_u32;
+ _63 = const true;
+ assert(const true, "attempt to shift right by `{}`, which would overflow", const 0_i32) -> [success: bb28, unwind continue];
}
bb28: {
- _60 = Shr(move _61, const 0_i32);
+ _60 = Shr(_1, const 0_i32);
StorageDead(_61);
_59 = opaque::<u64>(move _60) -> [return: bb29, unwind continue];
}
bb29: {
StorageDead(_60);
StorageDead(_59);
StorageLive(_64);
StorageLive(_65);
StorageLive(_66);
_66 = _1;
- _67 = const 0_i32 as u32 (IntToInt);
- _68 = Lt(move _67, const 64_u32);
- assert(move _68, "attempt to shift left by `{}`, which would overflow", const 0_i32) -> [success: bb30, unwind continue];
+ _67 = const 0_u32;
+ _68 = const true;
+ assert(const true, "attempt to shift left by `{}`, which would overflow", const 0_i32) -> [success: bb30, unwind continue];
}
bb30: {
- _65 = Shl(move _66, const 0_i32);
+ _65 = Shl(_1, const 0_i32);
StorageDead(_66);
_64 = opaque::<u64>(move _65) -> [return: bb31, unwind continue];
}
bb31: {
StorageDead(_65);
StorageDead(_64);
_0 = const ();
return;
}

94
tests/mir-opt/gvn.comparison.GVN.panic-abort.diff Normal file
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@ -0,0 +1,94 @@
- // MIR for `comparison` before GVN
+ // MIR for `comparison` after GVN
fn comparison(_1: u64, _2: u64) -> () {
debug x => _1;
debug y => _2;
let mut _0: ();
let _3: ();
let mut _4: bool;
let mut _5: u64;
let mut _6: u64;
let _7: ();
let mut _8: bool;
let mut _9: u64;
let mut _10: u64;
let _11: ();
let mut _12: bool;
let mut _13: u64;
let mut _14: u64;
let _15: ();
let mut _16: bool;
let mut _17: u64;
let mut _18: u64;
bb0: {
StorageLive(_3);
StorageLive(_4);
StorageLive(_5);
_5 = _1;
StorageLive(_6);
_6 = _1;
- _4 = Eq(move _5, move _6);
+ _4 = Eq(_1, _1);
StorageDead(_6);
StorageDead(_5);
_3 = opaque::<bool>(move _4) -> [return: bb1, unwind unreachable];
}
bb1: {
StorageDead(_4);
StorageDead(_3);
StorageLive(_7);
StorageLive(_8);
StorageLive(_9);
_9 = _1;
StorageLive(_10);
_10 = _1;
- _8 = Ne(move _9, move _10);
+ _8 = Ne(_1, _1);
StorageDead(_10);
StorageDead(_9);
_7 = opaque::<bool>(move _8) -> [return: bb2, unwind unreachable];
}
bb2: {
StorageDead(_8);
StorageDead(_7);
StorageLive(_11);
StorageLive(_12);
StorageLive(_13);
_13 = _1;
StorageLive(_14);
_14 = _2;
- _12 = Eq(move _13, move _14);
+ _12 = Eq(_1, _2);
StorageDead(_14);
StorageDead(_13);
_11 = opaque::<bool>(move _12) -> [return: bb3, unwind unreachable];
}
bb3: {
StorageDead(_12);
StorageDead(_11);
StorageLive(_15);
StorageLive(_16);
StorageLive(_17);
_17 = _1;
StorageLive(_18);
_18 = _2;
- _16 = Ne(move _17, move _18);
+ _16 = Ne(_1, _2);
StorageDead(_18);
StorageDead(_17);
_15 = opaque::<bool>(move _16) -> [return: bb4, unwind unreachable];
}
bb4: {
StorageDead(_16);
StorageDead(_15);
_0 = const ();
return;
}
}

94
tests/mir-opt/gvn.comparison.GVN.panic-unwind.diff Normal file
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@ -0,0 +1,94 @@
- // MIR for `comparison` before GVN
+ // MIR for `comparison` after GVN
fn comparison(_1: u64, _2: u64) -> () {
debug x => _1;
debug y => _2;
let mut _0: ();
let _3: ();
let mut _4: bool;
let mut _5: u64;
let mut _6: u64;
let _7: ();
let mut _8: bool;
let mut _9: u64;
let mut _10: u64;
let _11: ();
let mut _12: bool;
let mut _13: u64;
let mut _14: u64;
let _15: ();
let mut _16: bool;
let mut _17: u64;
let mut _18: u64;
bb0: {
StorageLive(_3);
StorageLive(_4);
StorageLive(_5);
_5 = _1;
StorageLive(_6);
_6 = _1;
- _4 = Eq(move _5, move _6);
+ _4 = Eq(_1, _1);
StorageDead(_6);
StorageDead(_5);
_3 = opaque::<bool>(move _4) -> [return: bb1, unwind continue];
}
bb1: {
StorageDead(_4);
StorageDead(_3);
StorageLive(_7);
StorageLive(_8);
StorageLive(_9);
_9 = _1;
StorageLive(_10);
_10 = _1;
- _8 = Ne(move _9, move _10);
+ _8 = Ne(_1, _1);
StorageDead(_10);
StorageDead(_9);
_7 = opaque::<bool>(move _8) -> [return: bb2, unwind continue];
}
bb2: {
StorageDead(_8);
StorageDead(_7);
StorageLive(_11);
StorageLive(_12);
StorageLive(_13);
_13 = _1;
StorageLive(_14);
_14 = _2;
- _12 = Eq(move _13, move _14);
+ _12 = Eq(_1, _2);
StorageDead(_14);
StorageDead(_13);
_11 = opaque::<bool>(move _12) -> [return: bb3, unwind continue];
}
bb3: {
StorageDead(_12);
StorageDead(_11);
StorageLive(_15);
StorageLive(_16);
StorageLive(_17);
_17 = _1;
StorageLive(_18);
_18 = _2;
- _16 = Ne(move _17, move _18);
+ _16 = Ne(_1, _2);
StorageDead(_18);
StorageDead(_17);
_15 = opaque::<bool>(move _16) -> [return: bb4, unwind continue];
}
bb4: {
StorageDead(_16);
StorageDead(_15);
_0 = const ();
return;
}
}

79
tests/mir-opt/gvn.repeat.GVN.panic-abort.diff Normal file
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@ -0,0 +1,79 @@
- // MIR for `repeat` before GVN
+ // MIR for `repeat` after GVN
fn repeat() -> () {
let mut _0: ();
let _1: i32;
let mut _3: i32;
let mut _4: i32;
let mut _5: i32;
let mut _6: i32;
let mut _7: i32;
let mut _8: i32;
let mut _9: i32;
let mut _10: i32;
let mut _11: i32;
let mut _12: i32;
scope 1 {
debug val => _1;
let _2: [i32; 10];
scope 2 {
debug array => _2;
}
}
bb0: {
- StorageLive(_1);
+ nop;
_1 = const 5_i32;
StorageLive(_2);
StorageLive(_3);
- _3 = _1;
+ _3 = const 5_i32;
StorageLive(_4);
- _4 = _1;
+ _4 = const 5_i32;
StorageLive(_5);
- _5 = _1;
+ _5 = const 5_i32;
StorageLive(_6);
- _6 = _1;
+ _6 = const 5_i32;
StorageLive(_7);
- _7 = _1;
+ _7 = const 5_i32;
StorageLive(_8);
- _8 = _1;
+ _8 = const 5_i32;
StorageLive(_9);
- _9 = _1;
+ _9 = const 5_i32;
StorageLive(_10);
- _10 = _1;
+ _10 = const 5_i32;
StorageLive(_11);
- _11 = _1;
+ _11 = const 5_i32;
StorageLive(_12);
- _12 = _1;
- _2 = [move _3, move _4, move _5, move _6, move _7, move _8, move _9, move _10, move _11, move _12];
+ _12 = const 5_i32;
+ _2 = [const 5_i32; 10];
StorageDead(_12);
StorageDead(_11);
StorageDead(_10);
StorageDead(_9);
StorageDead(_8);
StorageDead(_7);
StorageDead(_6);
StorageDead(_5);
StorageDead(_4);
StorageDead(_3);
_0 = const ();
StorageDead(_2);
- StorageDead(_1);
+ nop;
return;
}
}

79
tests/mir-opt/gvn.repeat.GVN.panic-unwind.diff Normal file
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@ -0,0 +1,79 @@
- // MIR for `repeat` before GVN
+ // MIR for `repeat` after GVN
fn repeat() -> () {
let mut _0: ();
let _1: i32;
let mut _3: i32;
let mut _4: i32;
let mut _5: i32;
let mut _6: i32;
let mut _7: i32;
let mut _8: i32;
let mut _9: i32;
let mut _10: i32;
let mut _11: i32;
let mut _12: i32;
scope 1 {
debug val => _1;
let _2: [i32; 10];
scope 2 {
debug array => _2;
}
}
bb0: {
- StorageLive(_1);
+ nop;
_1 = const 5_i32;
StorageLive(_2);
StorageLive(_3);
- _3 = _1;
+ _3 = const 5_i32;
StorageLive(_4);
- _4 = _1;
+ _4 = const 5_i32;
StorageLive(_5);
- _5 = _1;
+ _5 = const 5_i32;
StorageLive(_6);
- _6 = _1;
+ _6 = const 5_i32;
StorageLive(_7);
- _7 = _1;
+ _7 = const 5_i32;
StorageLive(_8);
- _8 = _1;
+ _8 = const 5_i32;
StorageLive(_9);
- _9 = _1;
+ _9 = const 5_i32;
StorageLive(_10);
- _10 = _1;
+ _10 = const 5_i32;
StorageLive(_11);
- _11 = _1;
+ _11 = const 5_i32;
StorageLive(_12);
- _12 = _1;
- _2 = [move _3, move _4, move _5, move _6, move _7, move _8, move _9, move _10, move _11, move _12];
+ _12 = const 5_i32;
+ _2 = [const 5_i32; 10];
StorageDead(_12);
StorageDead(_11);
StorageDead(_10);
StorageDead(_9);
StorageDead(_8);
StorageDead(_7);
StorageDead(_6);
StorageDead(_5);
StorageDead(_4);
StorageDead(_3);
_0 = const ();
StorageDead(_2);
- StorageDead(_1);
+ nop;
return;
}
}

413
tests/mir-opt/gvn.rs
View File

@ -1,4 +1,3 @@
// skip-filecheck
// unit-test: GVN
// EMIT_MIR_FOR_EACH_PANIC_STRATEGY
// only-64bit
@ -15,48 +14,120 @@ use std::mem::transmute;
struct S<T>(T);
fn subexpression_elimination(x: u64, y: u64, mut z: u64) {
// CHECK-LABEL: fn subexpression_elimination(
// CHECK: [[add:_.*]] = Add(_1, _2);
// CHECK: opaque::<u64>([[add]])
opaque(x + y);
// CHECK: [[mul:_.*]] = Mul(_1, _2);
// CHECK: opaque::<u64>([[mul]])
opaque(x * y);
// CHECK: [[sub:_.*]] = Sub(_1, _2);
// CHECK: opaque::<u64>([[sub]])
opaque(x - y);
// CHECK: [[div:_.*]] = Div(_1, _2);
// CHECK: opaque::<u64>([[div]])
opaque(x / y);
// CHECK: [[rem:_.*]] = Rem(_1, _2);
// CHECK: opaque::<u64>([[rem]])
opaque(x % y);
// CHECK: [[and:_.*]] = BitAnd(_1, _2);
// CHECK: opaque::<u64>([[and]])
opaque(x & y);
// CHECK: [[or:_.*]] = BitOr(_1, _2);
// CHECK: opaque::<u64>([[or]])
opaque(x | y);
// CHECK: [[xor:_.*]] = BitXor(_1, _2);
// CHECK: opaque::<u64>([[xor]])
opaque(x ^ y);
// CHECK: [[shl:_.*]] = Shl(_1, _2);
// CHECK: opaque::<u64>([[shl]])
opaque(x << y);
// CHECK: [[shr:_.*]] = Shr(_1, _2);
// CHECK: opaque::<u64>([[shr]])
opaque(x >> y);
// CHECK: [[int:_.*]] = _1 as u32 (IntToInt);
// CHECK: opaque::<u32>([[int]])
opaque(x as u32);
// CHECK: [[float:_.*]] = _1 as f32 (IntToFloat);
// CHECK: opaque::<f32>([[float]])
opaque(x as f32);
// CHECK: [[wrap:_.*]] = S::<u64>(_1);
// CHECK: opaque::<S<u64>>([[wrap]])
opaque(S(x));
// CHECK: opaque::<u64>(_1)
opaque(S(x).0);
// Those are duplicates to substitute somehow.
opaque((x + y) + z);
opaque((x * y) + z);
opaque((x - y) + z);
opaque((x / y) + z);
opaque((x % y) + z);
opaque((x & y) + z);
opaque((x | y) + z);
opaque((x ^ y) + z);
opaque((x << y) + z);
opaque((x >> y) + z);
// CHECK: opaque::<u64>([[add]])
opaque(x + y);
// CHECK: opaque::<u64>([[mul]])
opaque(x * y);
// CHECK: opaque::<u64>([[sub]])
opaque(x - y);
// CHECK: opaque::<u64>([[div]])
opaque(x / y);
// CHECK: opaque::<u64>([[rem]])
opaque(x % y);
// CHECK: opaque::<u64>([[and]])
opaque(x & y);
// CHECK: opaque::<u64>([[or]])
opaque(x | y);
// CHECK: opaque::<u64>([[xor]])
opaque(x ^ y);
// CHECK: opaque::<u64>([[shl]])
opaque(x << y);
// CHECK: opaque::<u64>([[shr]])
opaque(x >> y);
// CHECK: opaque::<u32>([[int]])
opaque(x as u32);
// CHECK: opaque::<f32>([[float]])
opaque(x as f32);
// CHECK: opaque::<S<u64>>([[wrap]])
opaque(S(x));
// CHECK: opaque::<u64>(_1)
opaque(S(x).0);
// We can substitute through a complex expression.
// CHECK: [[compound:_.*]] = Sub([[mul]], _2);
// CHECK: opaque::<u64>([[compound]])
// CHECK: opaque::<u64>([[compound]])
opaque((x * y) - y);
opaque((x * y) - y);
// We can substitute through an immutable reference too.
// CHECK: [[ref:_.*]] = &_3;
// CHECK: [[deref:_.*]] = (*[[ref]]);
// CHECK: [[addref:_.*]] = Add([[deref]], _1);
// CHECK: opaque::<u64>([[addref]])
// CHECK: opaque::<u64>([[addref]])
let a = &z;
opaque(*a + x);
opaque(*a + x);
// But not through a mutable reference or a pointer.
// CHECK: [[mut:_.*]] = &mut _3;
// CHECK: [[addmut:_.*]] = Add(
// CHECK: opaque::<u64>(move [[addmut]])
// CHECK: [[addmut2:_.*]] = Add(
// CHECK: opaque::<u64>(move [[addmut2]])
let b = &mut z;
opaque(*b + x);
opaque(*b + x);
unsafe {
// CHECK: [[raw:_.*]] = &raw const _3;
// CHECK: [[addraw:_.*]] = Add(
// CHECK: opaque::<u64>(move [[addraw]])
// CHECK: [[addraw2:_.*]] = Add(
// CHECK: opaque::<u64>(move [[addraw2]])
let c = &raw const z;
opaque(*c + x);
opaque(*c + x);
// CHECK: [[ptr:_.*]] = &raw mut _3;
// CHECK: [[addptr:_.*]] = Add(
// CHECK: opaque::<u64>(move [[addptr]])
// CHECK: [[addptr2:_.*]] = Add(
// CHECK: opaque::<u64>(move [[addptr2]])
let d = &raw mut z;
opaque(*d + x);
opaque(*d + x);
@ -64,12 +135,21 @@ fn subexpression_elimination(x: u64, y: u64, mut z: u64) {
// We can substitute again, but not with the earlier computations.
// Important: `e` is not `a`!
// CHECK: [[ref2:_.*]] = &_3;
// CHECK: [[deref2:_.*]] = (*[[ref2]]);
// CHECK: [[addref2:_.*]] = Add([[deref2]], _1);
// CHECK: opaque::<u64>([[addref2]])
// CHECK: opaque::<u64>([[addref2]])
let e = &z;
opaque(*e + x);
opaque(*e + x);
}
fn wrap_unwrap<T: Copy>(x: T) -> T {
// CHECK-LABEL: fn wrap_unwrap(
// CHECK: [[some:_.*]] = Option::<T>::Some(_1);
// CHECK: switchInt(const 1_isize)
// CHECK: _0 = _1;
match Some(x) {
Some(y) => y,
None => panic!(),
@ -77,155 +157,354 @@ fn wrap_unwrap<T: Copy>(x: T) -> T {
}
fn repeated_index<T: Copy, const N: usize>(x: T, idx: usize) {
// CHECK-LABEL: fn repeated_index(
// CHECK: [[a:_.*]] = [_1; N];
let a = [x; N];
// CHECK: opaque::<T>(_1)
opaque(a[0]);
// CHECK: opaque::<T>(_1)
opaque(a[idx]);
}
/// Verify symbolic integer arithmetic simplifications.
fn arithmetic(x: u64) {
// CHECK-LABEL: fn arithmetic(
// CHECK: [[add:_.*]] = Add(_1, const 0_u64);
// CHECK: opaque::<u64>(move [[add]])
opaque(x + 0);
// CHECK: [[sub:_.*]] = Sub(_1, const 0_u64);
// CHECK: opaque::<u64>(move [[sub]])
opaque(x - 0);
// CHECK: [[mul0:_.*]] = Mul(_1, const 0_u64);
// CHECK: opaque::<u64>(move [[mul0]])
opaque(x * 0);
// CHECK: [[mul1:_.*]] = Mul(_1, const 1_u64);
// CHECK: opaque::<u64>(move [[mul1]])
opaque(x * 1);
// CHECK: [[div0:_.*]] = Div(_1, const 0_u64);
// CHECK: opaque::<u64>(move [[div0]])
opaque(x / 0);
// CHECK: [[div1:_.*]] = Div(_1, const 1_u64);
// CHECK: opaque::<u64>(move [[div1]])
opaque(x / 1);
// CHECK: [[zdiv:_.*]] = Div(const 0_u64, _1);
// CHECK: opaque::<u64>(move [[zdiv]])
opaque(0 / x);
// CHECK: [[odiv:_.*]] = Div(const 1_u64, _1);
// CHECK: opaque::<u64>(move [[odiv]])
opaque(1 / x);
// CHECK: [[rem0:_.*]] = Rem(_1, const 0_u64);
// CHECK: opaque::<u64>(move [[rem0]])
opaque(x % 0);
// CHECK: [[rem1:_.*]] = Rem(_1, const 1_u64);
// CHECK: opaque::<u64>(move [[rem1]])
opaque(x % 1);
// CHECK: [[zrem:_.*]] = Rem(const 0_u64, _1);
// CHECK: opaque::<u64>(move [[zrem]])
opaque(0 % x);
// CHECK: [[orem:_.*]] = Rem(const 1_u64, _1);
// CHECK: opaque::<u64>(move [[orem]])
opaque(1 % x);
// CHECK: [[and:_.*]] = BitAnd(_1, const 0_u64);
// CHECK: opaque::<u64>(move [[and]])
opaque(x & 0);
// CHECK: [[or:_.*]] = BitOr(_1, const 0_u64);
// CHECK: opaque::<u64>(move [[or]])
opaque(x | 0);
// CHECK: [[xor:_.*]] = BitXor(_1, const 0_u64);
// CHECK: opaque::<u64>(move [[xor]])
opaque(x ^ 0);
// CHECK: [[shr:_.*]] = Shr(_1, const 0_i32);
// CHECK: opaque::<u64>(move [[shr]])
opaque(x >> 0);
// CHECK: [[shl:_.*]] = Shl(_1, const 0_i32);
// CHECK: opaque::<u64>(move [[shl]])
opaque(x << 0);
}
fn comparison(x: u64, y: u64) {
// CHECK-LABEL: fn comparison(
// CHECK: [[eqxx:_.*]] = Eq(_1, _1);
// CHECK: opaque::<bool>(move [[eqxx]])
opaque(x == x);
// CHECK: [[nexx:_.*]] = Ne(_1, _1);
// CHECK: opaque::<bool>(move [[nexx]])
opaque(x != x);
// CHECK: [[eqxy:_.*]] = Eq(_1, _2);
// CHECK: opaque::<bool>(move [[eqxy]])
opaque(x == y);
// CHECK: [[nexy:_.*]] = Ne(_1, _2);
// CHECK: opaque::<bool>(move [[nexy]])
opaque(x != y);
}
/// Verify symbolic integer arithmetic simplifications on checked ops.
#[rustc_inherit_overflow_checks]
fn arithmetic_checked(x: u64) {
// CHECK-LABEL: fn arithmetic_checked(
// CHECK: [[cadd:_.*]] = CheckedAdd(_1, const 0_u64);
// CHECK: [[add:_.*]] = move ([[cadd]].0: u64);
// CHECK: opaque::<u64>(move [[add]])
opaque(x + 0);
// CHECK: [[csub:_.*]] = CheckedSub(_1, const 0_u64);
// CHECK: [[sub:_.*]] = move ([[csub]].0: u64);
// CHECK: opaque::<u64>(move [[sub]])
opaque(x - 0);
// CHECK: [[cmul0:_.*]] = CheckedMul(_1, const 0_u64);
// CHECK: [[mul0:_.*]] = move ([[cmul0]].0: u64);
// CHECK: opaque::<u64>(move [[mul0]])
opaque(x * 0);
// CHECK: [[cmul1:_.*]] = CheckedMul(_1, const 1_u64);
// CHECK: [[mul1:_.*]] = move ([[cmul1]].0: u64);
// CHECK: opaque::<u64>(move [[mul1]])
opaque(x * 1);
opaque(x / 0);
opaque(x / 1);
opaque(0 / x);
opaque(1 / x);
opaque(x % 0);
opaque(x % 1);
opaque(0 % x);
opaque(1 % x);
opaque(x & 0);
opaque(x | 0);
opaque(x ^ 0);
opaque(x >> 0);
opaque(x << 0);
}
/// Verify that we do not apply arithmetic simplifications on floats.
fn arithmetic_float(x: f64) {
// CHECK-LABEL: fn arithmetic_float(
// CHECK: [[add:_.*]] = Add(_1, const 0f64);
// CHECK: opaque::<f64>(move [[add]])
opaque(x + 0.);
// CHECK: [[sub:_.*]] = Sub(_1, const 0f64);
// CHECK: opaque::<f64>(move [[sub]])
opaque(x - 0.);
// CHECK: [[mul:_.*]] = Mul(_1, const 0f64);
// CHECK: opaque::<f64>(move [[mul]])
opaque(x * 0.);
// CHECK: [[div0:_.*]] = Div(_1, const 0f64);
// CHECK: opaque::<f64>(move [[div0]])
opaque(x / 0.);
// CHECK: [[zdiv:_.*]] = Div(const 0f64, _1);
// CHECK: opaque::<f64>(move [[zdiv]])
opaque(0. / x);
// CHECK: [[rem0:_.*]] = Rem(_1, const 0f64);
// CHECK: opaque::<f64>(move [[rem0]])
opaque(x % 0.);
// CHECK: [[zrem:_.*]] = Rem(const 0f64, _1);
// CHECK: opaque::<f64>(move [[zrem]])
opaque(0. % x);
// Those are not simplifiable to `true`/`false`, thanks to NaNs.
// CHECK: [[eq:_.*]] = Eq(_1, _1);
// CHECK: opaque::<bool>(move [[eq]])
opaque(x == x);
// CHECK: [[ne:_.*]] = Ne(_1, _1);
// CHECK: opaque::<bool>(move [[ne]])
opaque(x != x);
}
fn cast() {
// CHECK-LABEL: fn cast(
let i = 1_i64;
let u = 1_u64;
let f = 1_f64;
// CHECK: opaque::<u8>(const 1_u8)
opaque(i as u8);
// CHECK: opaque::<u16>(const 1_u16)
opaque(i as u16);
// CHECK: opaque::<u32>(const 1_u32)
opaque(i as u32);
// CHECK: opaque::<u64>(const 1_u64)
opaque(i as u64);
// CHECK: opaque::<i8>(const 1_i8)
opaque(i as i8);
// CHECK: opaque::<i16>(const 1_i16)
opaque(i as i16);
// CHECK: opaque::<i32>(const 1_i32)
opaque(i as i32);
// CHECK: opaque::<i64>(const 1_i64)
opaque(i as i64);
// CHECK: opaque::<f32>(const 1f32)
opaque(i as f32);
// CHECK: opaque::<f64>(const 1f64)
opaque(i as f64);
// CHECK: opaque::<u8>(const 1_u8)
opaque(u as u8);
// CHECK: opaque::<u16>(const 1_u16)
opaque(u as u16);
// CHECK: opaque::<u32>(const 1_u32)
opaque(u as u32);
// CHECK: opaque::<u64>(const 1_u64)
opaque(u as u64);
// CHECK: opaque::<i8>(const 1_i8)
opaque(u as i8);
// CHECK: opaque::<i16>(const 1_i16)
opaque(u as i16);
// CHECK: opaque::<i32>(const 1_i32)
opaque(u as i32);
// CHECK: opaque::<i64>(const 1_i64)
opaque(u as i64);
// CHECK: opaque::<f32>(const 1f32)
opaque(u as f32);
// CHECK: opaque::<f64>(const 1f64)
opaque(u as f64);
// CHECK: opaque::<u8>(const 1_u8)
opaque(f as u8);
// CHECK: opaque::<u16>(const 1_u16)
opaque(f as u16);
// CHECK: opaque::<u32>(const 1_u32)
opaque(f as u32);
// CHECK: opaque::<u64>(const 1_u64)
opaque(f as u64);
// CHECK: opaque::<i8>(const 1_i8)
opaque(f as i8);
// CHECK: opaque::<i16>(const 1_i16)
opaque(f as i16);
// CHECK: opaque::<i32>(const 1_i32)
opaque(f as i32);
// CHECK: opaque::<i64>(const 1_i64)
opaque(f as i64);
// CHECK: opaque::<f32>(const 1f32)
opaque(f as f32);
// CHECK: opaque::<f64>(const 1f64)
opaque(f as f64);
}
fn multiple_branches(t: bool, x: u8, y: u8) {
// CHECK-LABEL: fn multiple_branches(
// CHECK: switchInt(_1) -> [0: [[bbf:bb.*]], otherwise: [[bbt:bb.*]]];
if t {
opaque(x + y); // a
opaque(x + y); // should reuse a
// CHECK: [[bbt]]: {
// CHECK: [[a:_.*]] = Add(_2, _3);
// CHECK: opaque::<u8>([[a]])
// CHECK: opaque::<u8>([[a]])
// CHECK: goto -> [[bbc:bb.*]];
opaque(x + y);
opaque(x + y);
} else {
opaque(x + y); // b
opaque(x + y); // shoud reuse b
// CHECK: [[bbf]]: {
// CHECK: [[b:_.*]] = Add(_2, _3);
// CHECK: opaque::<u8>([[b]])
// CHECK: opaque::<u8>([[b]])
// CHECK: goto -> [[bbc:bb.*]];
opaque(x + y);
opaque(x + y);
}
opaque(x + y); // c
// Neither `a` nor `b` dominate `c`, so we cannot reuse any of them.
// CHECK: [[bbc]]: {
// CHECK: [[c:_.*]] = Add(_2, _3);
// CHECK: opaque::<u8>([[c]])
opaque(x + y);
// `c` dominates both calls, so we can reuse it.
if t {
opaque(x + y); // should reuse c
// CHECK: opaque::<u8>([[c]])
opaque(x + y);
} else {
opaque(x + y); // should reuse c
// CHECK: opaque::<u8>([[c]])
opaque(x + y);
}
}
/// Verify that we do not reuse a `&raw? mut?` rvalue.
fn references(mut x: impl Sized) {
// CHECK-LABEL: fn references(
// CHECK: [[ref1:_.*]] = &_1;
// CHECK: opaque::<&impl Sized>(move [[ref1]])
opaque(&x);
opaque(&x); // should not reuse a
// CHECK: [[ref2:_.*]] = &_1;
// CHECK: opaque::<&impl Sized>(move [[ref2]])
opaque(&x);
// CHECK: [[ref3:_.*]] = &mut _1;
// CHECK: opaque::<&mut impl Sized>(move [[ref3]])
opaque(&mut x);
opaque(&mut x); // should not reuse a
// CHECK: [[ref4:_.*]] = &mut _1;
// CHECK: opaque::<&mut impl Sized>(move [[ref4]])
opaque(&mut x);
// CHECK: [[ref5:_.*]] = &raw const _1;
// CHECK: opaque::<*const impl Sized>(move [[ref5]])
opaque(&raw const x);
opaque(&raw const x); // should not reuse a
// CHECK: [[ref6:_.*]] = &raw const _1;
// CHECK: opaque::<*const impl Sized>(move [[ref6]])
opaque(&raw const x);
// CHECK: [[ref7:_.*]] = &raw mut _1;
// CHECK: opaque::<*mut impl Sized>(move [[ref7]])
opaque(&raw mut x);
// CHECK: [[ref8:_.*]] = &raw mut _1;
// CHECK: opaque::<*mut impl Sized>(move [[ref8]])
opaque(&raw mut x);
opaque(&raw mut x); // should not reuse a
let r = &mut x;
let s = S(r).0; // Obfuscate `r`.
opaque(&*s); // This is `&*r`.
opaque(&mut *s); // This is `&*r`.
opaque(&raw const *s); // This is `&*r`.
opaque(&raw mut *s); // This is `&*r`.
let s = S(r).0; // Obfuscate `r`. Following lines should still reborrow `r`.
// CHECK: [[ref9:_.*]] = &mut _1;
// CHECK: [[ref10:_.*]] = &(*[[ref9]]);
// CHECK: opaque::<&impl Sized>(move [[ref10]])
opaque(&*s);
// CHECK: [[ref11:_.*]] = &mut (*[[ref9]]);
// CHECK: opaque::<&mut impl Sized>(move [[ref11]])
opaque(&mut *s);
// CHECK: [[ref12:_.*]] = &raw const (*[[ref9]]);
// CHECK: opaque::<*const impl Sized>(move [[ref12]])
opaque(&raw const *s);
// CHECK: [[ref12:_.*]] = &raw mut (*[[ref9]]);
// CHECK: opaque::<*mut impl Sized>(move [[ref12]])
opaque(&raw mut *s);
}
fn dereferences(t: &mut u32, u: &impl Copy, s: &S<u32>) {
// CHECK-LABEL: fn dereferences(
// Do not reuse dereferences of `&mut`.
// CHECK: [[st1:_.*]] = (*_1);
// CHECK: opaque::<u32>(move [[st1]])
// CHECK: [[st2:_.*]] = (*_1);
// CHECK: opaque::<u32>(move [[st2]])
opaque(*t);
opaque(*t); // this cannot reuse a, as x is &mut.
opaque(*t);
// Do not reuse dereferences of `*const`.
// CHECK: [[raw:_.*]] = &raw const (*_1);
// CHECK: [[st3:_.*]] = (*[[raw]]);
// CHECK: opaque::<u32>(move [[st3]])
// CHECK: [[st4:_.*]] = (*[[raw]]);
// CHECK: opaque::<u32>(move [[st4]])
let z = &raw const *t;
unsafe { opaque(*z) };
unsafe { opaque(*z) }; // this cannot reuse a, as x is *const.
unsafe { opaque(*z) };
// Do not reuse dereferences of `*mut`.
// CHECK: [[ptr:_.*]] = &raw mut (*_1);
// CHECK: [[st5:_.*]] = (*[[ptr]]);
// CHECK: opaque::<u32>(move [[st5]])
// CHECK: [[st6:_.*]] = (*[[ptr]]);
// CHECK: opaque::<u32>(move [[st6]])
let z = &raw mut *t;
unsafe { opaque(*z) };
unsafe { opaque(*z) }; // this cannot reuse a, as x is *mut.
unsafe { opaque(*z) };
// We can reuse dereferences of `&Freeze`.
// CHECK: [[ref:_.*]] = &(*_1);
// CHECK: [[st7:_.*]] = (*[[ref]]);
// CHECK: opaque::<u32>([[st7]])
// CHECK: opaque::<u32>([[st7]])
let z = &*t;
opaque(*z);
opaque(*z); // this can reuse, as `z` is immutable ref, Freeze and Copy.
opaque(&*z); // but not for a reborrow.
opaque(*z);
// But not in reborrows.
// CHECK: [[reborrow:_.*]] = &(*[[ref]]);
// CHECK: opaque::<&u32>(move [[reborrow]])
opaque(&*z);
// `*u` is not Freeze, so we cannot reuse.
// CHECK: [[st8:_.*]] = (*_2);
// CHECK: opaque::<impl Copy>(move [[st8]])
// CHECK: [[st9:_.*]] = (*_2);
// CHECK: opaque::<impl Copy>(move [[st9]])
opaque(*u);
opaque(*u); // this cannot reuse, as `z` is not Freeze.
opaque(*u);
// `*s` is not Copy, by `(*s).0` is, so we can reuse.
// CHECK: [[st10:_.*]] = ((*_3).0: u32);
// CHECK: opaque::<u32>([[st10]])
// CHECK: opaque::<u32>([[st10]])
opaque(s.0);
opaque(s.0);
opaque(s.0); // *s is not Copy, by (*s).0 is, so we can reuse.
}
fn slices() {
// CHECK-LABEL: fn slices(
// CHECK: {{_.*}} = const "
// CHECK-NOT: {{_.*}} = const "
let s = "my favourite slice"; // This is a `Const::Slice` in MIR.
opaque(s);
let t = s; // This should be the same pointer, so cannot be a `Const::Slice`.
@ -238,6 +517,7 @@ fn slices() {
#[custom_mir(dialect = "analysis")]
fn duplicate_slice() -> (bool, bool) {
// CHECK-LABEL: fn duplicate_slice(
mir!(
let au: u128;
let bu: u128;
@ -246,41 +526,50 @@ fn duplicate_slice() -> (bool, bool) {
let c: &str;
let d: &str;
{
// CHECK: [[a:_.*]] = (const "a",);
// CHECK: [[au:_.*]] = ([[a]].0: &str) as u128 (Transmute);
let a = ("a",);
Call(au = transmute::<_, u128>(a.0), bb1)
}
bb1 = {
// CHECK: [[c:_.*]] = identity::<&str>(([[a]].0: &str))
Call(c = identity(a.0), bb2)
}
bb2 = {
// CHECK: [[cu:_.*]] = [[c]] as u128 (Transmute);
Call(cu = transmute::<_, u128>(c), bb3)
}
bb3 = {
let b = "a"; // This slice is different from `a.0`.
Call(bu = transmute::<_, u128>(b), bb4) // Hence `bu` is not `au`.
// This slice is different from `a.0`. Hence `bu` is not `au`.
// CHECK: [[b:_.*]] = const "a";
// CHECK: [[bu:_.*]] = [[b]] as u128 (Transmute);
let b = "a";
Call(bu = transmute::<_, u128>(b), bb4)
}
bb4 = {
Call(d = identity(b), bb5) // This returns a copy of `b`, which is not `a`.
// This returns a copy of `b`, which is not `a`.
// CHECK: [[d:_.*]] = identity::<&str>([[b]])
Call(d = identity(b), bb5)
}
bb5 = {
// CHECK: [[du:_.*]] = [[d]] as u128 (Transmute);
Call(du = transmute::<_, u128>(d), bb6)
}
bb6 = {
let direct = au == bu; // Must not fold to `true`...
let indirect = cu == du; // ...as this will not.
// `direct` must not fold to `true`, as `indirect` will not.
// CHECK: = Eq([[au]], [[bu]]);
// CHECK: = Eq([[cu]], [[du]]);
let direct = au == bu;
let indirect = cu == du;
RET = (direct, indirect);
Return()
}
)
}
fn aggregates() {
let a_array: S<[u8; 0]> = S([]);
let b_array: S<[u16; 0]> = S([]); // This must not be merged with `a_array`.
let a_tuple: S<()> = S(());
let b_tuple: S<()> = S(()); // But this can be with `a_tuple`.
fn repeat() {
// CHECK-LABEL: fn repeat(
// CHECK: = [const 5_i32; 10];
let val = 5;
let array = [val, val, val, val, val, val, val, val, val, val];
}
@ -290,6 +579,7 @@ fn main() {
wrap_unwrap(5);
repeated_index::<u32, 7>(5, 3);
arithmetic(5);
comparison(5, 6);
arithmetic_checked(5);
arithmetic_float(5.);
cast();
@ -299,7 +589,7 @@ fn main() {
slices();
let (direct, indirect) = duplicate_slice();
assert_eq!(direct, indirect);
aggregates();
repeat();
}
#[inline(never)]
@ -314,6 +604,7 @@ fn identity<T>(x: T) -> T {
// EMIT_MIR gvn.wrap_unwrap.GVN.diff
// EMIT_MIR gvn.repeated_index.GVN.diff
// EMIT_MIR gvn.arithmetic.GVN.diff
// EMIT_MIR gvn.comparison.GVN.diff
// EMIT_MIR gvn.arithmetic_checked.GVN.diff
// EMIT_MIR gvn.arithmetic_float.GVN.diff
// EMIT_MIR gvn.cast.GVN.diff
@ -322,4 +613,4 @@ fn identity<T>(x: T) -> T {
// EMIT_MIR gvn.dereferences.GVN.diff
// EMIT_MIR gvn.slices.GVN.diff
// EMIT_MIR gvn.duplicate_slice.GVN.diff
// EMIT_MIR gvn.aggregates.GVN.diff
// EMIT_MIR gvn.repeat.GVN.diff

918
tests/mir-opt/gvn.subexpression_elimination.GVN.panic-abort.diff
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918
tests/mir-opt/gvn.subexpression_elimination.GVN.panic-unwind.diff
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