nordic-dev.net/rust
nordic-dev.net/rust
2
0
Fork 0
mirror of https://github.com/rust-lang/rust.git synced 2024-11-02 15:32:06 +00:00
Code Issues Packages Projects Releases Wiki Activity

use singed_int_max/min helper methods

Browse Source
This commit is contained in:
Ralf Jung 2022-03-06 19:11:31 -05:00
parent 956659e5ce
commit ac844986d8
1 changed files with 4 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
compiler/rustc_const_eval/src/interpret/intrinsics.rs
View File

@ -493,23 +493,20 @@ impl<'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> InterpCx<'mir, 'tcx, M> {
// Negative overflow not possible since the positive first term
// can only increase an (in range) negative term for addition
// or corresponding negated positive term for subtraction
Scalar::from_uint(
(1u128 << (num_bits - 1)) - 1, // max positive
Size::from_bits(num_bits),
)
Scalar::from_int(size.signed_int_max(), size)
} else {
// Positive overflow not possible for similar reason
// max negative
Scalar::from_uint(1u128 << (num_bits - 1), Size::from_bits(num_bits))
Scalar::from_int(size.signed_int_min(), size)
}
} else {
// unsigned
if matches!(mir_op, BinOp::Add) {
// max unsigned
Scalar::from_uint(size.unsigned_int_max(), Size::from_bits(num_bits))
Scalar::from_uint(size.unsigned_int_max(), size)
} else {
// underflow to 0
Scalar::from_uint(0u128, Size::from_bits(num_bits))
Scalar::from_uint(0u128, size)
}
}
} else {