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rust/tests/mir-opt/const_debuginfo.main.ConstDebugInfo.diff

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[mir-opt] Allow debuginfo to be generated for a constant or a Place Prior to this commit, debuginfo was always generated by mapping a name to a Place. This has the side-effect that `SimplifyLocals` cannot remove locals that are only used for debuginfo because their other uses have been const-propagated. To allow these locals to be removed, we now allow debuginfo to point to a constant value. The `ConstProp` pass detects when debuginfo points to a local with a known constant value and replaces it with the value. This allows the later `SimplifyLocals` pass to remove the local.
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- // MIR for `main` before ConstDebugInfo
+ // MIR for `main` after ConstDebugInfo
fn main() -> () {
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let mut _0: ();
let _1: u8;
FileCheck const_debuginfo.
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let mut _5: u8;
let mut _6: u8;
let mut _7: u8;
let mut _8: u8;
let mut _14: u32;
let mut _15: u32;
[mir-opt] Allow debuginfo to be generated for a constant or a Place Prior to this commit, debuginfo was always generated by mapping a name to a Place. This has the side-effect that `SimplifyLocals` cannot remove locals that are only used for debuginfo because their other uses have been const-propagated. To allow these locals to be removed, we now allow debuginfo to point to a constant value. The `ConstProp` pass detects when debuginfo points to a local with a known constant value and replaces it with the value. This allows the later `SimplifyLocals` pass to remove the local.
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scope 1 {
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- debug x => _1;
+ debug x => const 1_u8;
let _2: u8;
[mir-opt] Allow debuginfo to be generated for a constant or a Place Prior to this commit, debuginfo was always generated by mapping a name to a Place. This has the side-effect that `SimplifyLocals` cannot remove locals that are only used for debuginfo because their other uses have been const-propagated. To allow these locals to be removed, we now allow debuginfo to point to a constant value. The `ConstProp` pass detects when debuginfo points to a local with a known constant value and replaces it with the value. This allows the later `SimplifyLocals` pass to remove the local.
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scope 2 {
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- debug y => _2;
+ debug y => const 2_u8;
let _3: u8;
[mir-opt] Allow debuginfo to be generated for a constant or a Place Prior to this commit, debuginfo was always generated by mapping a name to a Place. This has the side-effect that `SimplifyLocals` cannot remove locals that are only used for debuginfo because their other uses have been const-propagated. To allow these locals to be removed, we now allow debuginfo to point to a constant value. The `ConstProp` pass detects when debuginfo points to a local with a known constant value and replaces it with the value. This allows the later `SimplifyLocals` pass to remove the local.
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scope 3 {
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- debug z => _3;
+ debug z => const 3_u8;
let _4: u8;
[mir-opt] Allow debuginfo to be generated for a constant or a Place Prior to this commit, debuginfo was always generated by mapping a name to a Place. This has the side-effect that `SimplifyLocals` cannot remove locals that are only used for debuginfo because their other uses have been const-propagated. To allow these locals to be removed, we now allow debuginfo to point to a constant value. The `ConstProp` pass detects when debuginfo points to a local with a known constant value and replaces it with the value. This allows the later `SimplifyLocals` pass to remove the local.
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scope 4 {
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- debug sum => _4;
+ debug sum => const 6_u8;
FileCheck const_debuginfo.
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let _9: &str;
[mir-opt] Allow debuginfo to be generated for a constant or a Place Prior to this commit, debuginfo was always generated by mapping a name to a Place. This has the side-effect that `SimplifyLocals` cannot remove locals that are only used for debuginfo because their other uses have been const-propagated. To allow these locals to be removed, we now allow debuginfo to point to a constant value. The `ConstProp` pass detects when debuginfo points to a local with a known constant value and replaces it with the value. This allows the later `SimplifyLocals` pass to remove the local.
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scope 5 {
FileCheck const_debuginfo.
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- debug s => _9;
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+ debug s => const "hello, world!";
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let _10: (bool, bool, u32);
[mir-opt] Allow debuginfo to be generated for a constant or a Place Prior to this commit, debuginfo was always generated by mapping a name to a Place. This has the side-effect that `SimplifyLocals` cannot remove locals that are only used for debuginfo because their other uses have been const-propagated. To allow these locals to be removed, we now allow debuginfo to point to a constant value. The `ConstProp` pass detects when debuginfo points to a local with a known constant value and replaces it with the value. This allows the later `SimplifyLocals` pass to remove the local.
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scope 6 {
FileCheck const_debuginfo.
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debug f => _10;
let _11: std::option::Option<u16>;
[mir-opt] Allow debuginfo to be generated for a constant or a Place Prior to this commit, debuginfo was always generated by mapping a name to a Place. This has the side-effect that `SimplifyLocals` cannot remove locals that are only used for debuginfo because their other uses have been const-propagated. To allow these locals to be removed, we now allow debuginfo to point to a constant value. The `ConstProp` pass detects when debuginfo points to a local with a known constant value and replaces it with the value. This allows the later `SimplifyLocals` pass to remove the local.
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scope 7 {
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debug o => _11;
let _12: Point;
[mir-opt] Allow debuginfo to be generated for a constant or a Place Prior to this commit, debuginfo was always generated by mapping a name to a Place. This has the side-effect that `SimplifyLocals` cannot remove locals that are only used for debuginfo because their other uses have been const-propagated. To allow these locals to be removed, we now allow debuginfo to point to a constant value. The `ConstProp` pass detects when debuginfo points to a local with a known constant value and replaces it with the value. This allows the later `SimplifyLocals` pass to remove the local.
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scope 8 {
FileCheck const_debuginfo.
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- debug p => _12;
+ debug p => const Point {{ x: 32_u32, y: 32_u32 }};
let _13: u32;
[mir-opt] Allow debuginfo to be generated for a constant or a Place Prior to this commit, debuginfo was always generated by mapping a name to a Place. This has the side-effect that `SimplifyLocals` cannot remove locals that are only used for debuginfo because their other uses have been const-propagated. To allow these locals to be removed, we now allow debuginfo to point to a constant value. The `ConstProp` pass detects when debuginfo points to a local with a known constant value and replaces it with the value. This allows the later `SimplifyLocals` pass to remove the local.
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scope 9 {
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- debug a => _13;
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+ debug a => const 64_u32;
[mir-opt] Allow debuginfo to be generated for a constant or a Place Prior to this commit, debuginfo was always generated by mapping a name to a Place. This has the side-effect that `SimplifyLocals` cannot remove locals that are only used for debuginfo because their other uses have been const-propagated. To allow these locals to be removed, we now allow debuginfo to point to a constant value. The `ConstProp` pass detects when debuginfo points to a local with a known constant value and replaces it with the value. This allows the later `SimplifyLocals` pass to remove the local.
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}
}
}
}
}
}
}
}
}
bb0: {
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StorageLive(_1);
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_1 = const 1_u8;
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StorageLive(_2);
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_2 = const 2_u8;
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StorageLive(_3);
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_3 = const 3_u8;
StorageLive(_4);
Do not remove unused definitions inside GVN.
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StorageLive(_5);
StorageLive(_6);
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_6 = const 1_u8;
Do not remove unused definitions inside GVN.
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StorageLive(_7);
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_7 = const 2_u8;
_5 = const 3_u8;
Do not remove unused definitions inside GVN.
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StorageDead(_7);
StorageDead(_6);
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StorageLive(_8);
_8 = const 3_u8;
_4 = const 6_u8;
Do not remove unused definitions inside GVN.
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StorageDead(_8);
StorageDead(_5);
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StorageLive(_9);
_9 = const "hello, world!";
StorageLive(_10);
_10 = (const true, const false, const 123_u32);
StorageLive(_11);
_11 = Option::<u16>::Some(const 99_u16);
StorageLive(_12);
_12 = const Point {{ x: 32_u32, y: 32_u32 }};
StorageLive(_13);
StorageLive(_14);
_14 = const 32_u32;
StorageLive(_15);
_15 = const 32_u32;
_13 = const 64_u32;
StorageDead(_15);
StorageDead(_14);
_0 = const ();
StorageDead(_13);
StorageDead(_12);
StorageDead(_11);
StorageDead(_10);
StorageDead(_9);
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StorageDead(_4);
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StorageDead(_3);
StorageDead(_2);
StorageDead(_1);
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return;
[mir-opt] Allow debuginfo to be generated for a constant or a Place Prior to this commit, debuginfo was always generated by mapping a name to a Place. This has the side-effect that `SimplifyLocals` cannot remove locals that are only used for debuginfo because their other uses have been const-propagated. To allow these locals to be removed, we now allow debuginfo to point to a constant value. The `ConstProp` pass detects when debuginfo points to a local with a known constant value and replaces it with the value. This allows the later `SimplifyLocals` pass to remove the local.
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}
}
FileCheck const_debuginfo.
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ALLOC0 (size: 8, align: 4) {
20 00 00 00 20 00 00 00 │ ... ...
Use a ConstValue instead.
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}
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