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Rollup merge of #125559 - scottmcm:simplify-shift-ubcheck, r=workingjubilee

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Simplify the `unchecked_sh[lr]` ub-checks a bit

It can use the constant in the check, rather than passing it as a parameter.
This commit is contained in:
Jubilee 2024-05-26 15:28:28 -07:00 committed by GitHub
commit 25b079a1cf
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6 changed files with 8 additions and 12 deletions
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6
library/core/src/num/int_macros.rs
View File

@ -1282,8 +1282,7 @@ macro_rules! int_impl {
concat!(stringify!($SelfT), "::unchecked_shl cannot overflow"),
(
rhs: u32 = rhs,
bits: u32 = Self::BITS,
) => rhs < bits,
) => rhs < <$ActualT>::BITS,
);
// SAFETY: this is guaranteed to be safe by the caller.
@ -1381,8 +1380,7 @@ macro_rules! int_impl {
concat!(stringify!($SelfT), "::unchecked_shr cannot overflow"),
(
rhs: u32 = rhs,
bits: u32 = Self::BITS,
) => rhs < bits,
) => rhs < <$ActualT>::BITS,
);
// SAFETY: this is guaranteed to be safe by the caller.

6
library/core/src/num/uint_macros.rs
View File

@ -1369,8 +1369,7 @@ macro_rules! uint_impl {
concat!(stringify!($SelfT), "::unchecked_shl cannot overflow"),
(
rhs: u32 = rhs,
bits: u32 = Self::BITS,
) => rhs < bits,
) => rhs < <$ActualT>::BITS,
);
// SAFETY: this is guaranteed to be safe by the caller.
@ -1468,8 +1467,7 @@ macro_rules! uint_impl {
concat!(stringify!($SelfT), "::unchecked_shr cannot overflow"),
(
rhs: u32 = rhs,
bits: u32 = Self::BITS,
) => rhs < bits,
) => rhs < <$ActualT>::BITS,
);
// SAFETY: this is guaranteed to be safe by the caller.

2
tests/mir-opt/inline/unchecked_shifts.unchecked_shl_unsigned_smaller.Inline.panic-abort.diff
View File

@ -29,7 +29,7 @@
}
bb1: {
+ _6 = core::num::<impl u16>::unchecked_shl::precondition_check(_4, const core::num::<impl u16>::BITS) -> [return: bb2, unwind unreachable];
+ _6 = core::num::<impl u16>::unchecked_shl::precondition_check(_4) -> [return: bb2, unwind unreachable];
+ }
+
+ bb2: {

2
tests/mir-opt/inline/unchecked_shifts.unchecked_shl_unsigned_smaller.Inline.panic-unwind.diff
View File

@ -29,7 +29,7 @@
}
bb1: {
+ _6 = core::num::<impl u16>::unchecked_shl::precondition_check(_4, const core::num::<impl u16>::BITS) -> [return: bb2, unwind unreachable];
+ _6 = core::num::<impl u16>::unchecked_shl::precondition_check(_4) -> [return: bb2, unwind unreachable];
+ }
+
+ bb2: {

2
tests/mir-opt/inline/unchecked_shifts.unchecked_shr_signed_bigger.Inline.panic-abort.diff
View File

@ -29,7 +29,7 @@
}
bb1: {
+ _6 = core::num::<impl i64>::unchecked_shr::precondition_check(_4, const core::num::<impl i64>::BITS) -> [return: bb2, unwind unreachable];
+ _6 = core::num::<impl i64>::unchecked_shr::precondition_check(_4) -> [return: bb2, unwind unreachable];
+ }
+
+ bb2: {

2
tests/mir-opt/inline/unchecked_shifts.unchecked_shr_signed_bigger.Inline.panic-unwind.diff
View File

@ -29,7 +29,7 @@
}
bb1: {
+ _6 = core::num::<impl i64>::unchecked_shr::precondition_check(_4, const core::num::<impl i64>::BITS) -> [return: bb2, unwind unreachable];
+ _6 = core::num::<impl i64>::unchecked_shr::precondition_check(_4) -> [return: bb2, unwind unreachable];
+ }
+
+ bb2: {