rust/compiler/rustc_middle
Michael Goulet 5460f92a0f
Rollup merge of #112168 - scottmcm:lower-div-rem-unchecked-to-mir, r=oli-obk
Lower `unchecked_div`/`_rem` to MIR's `BinOp::Div`/`Rem`

As described in <https://doc.rust-lang.org/nightly/nightly-rustc/rustc_middle/mir/enum.BinOp.html#variant.Div>, the ordinary `BinOp`s for these are already UB for division by zero ([or overflow](https://llvm.org/docs/LangRef.html#sdiv-instruction), [demo](https://rust.godbolt.org/z/71e7P7Exh)), as MIR building is responsible for inserting code to panic for those cases regardless of whether the overflow checks are enabled.

So we can lower these in the same arm that lowers `wrapping_add` to MIR `BinOp::Add` and such, as all these cases turn into ordinary `Rvalue::BinaryOp`s.
2023-06-02 16:02:06 -07:00
..
src Rollup merge of #112168 - scottmcm:lower-div-rem-unchecked-to-mir, r=oli-obk 2023-06-02 16:02:06 -07:00
Cargo.toml Use dynamic dispatch for queries 2023-04-30 09:48:47 +02:00
messages.ftl Use translatable diagnostics in rustc_const_eval 2023-06-01 14:45:18 +00:00
README.md

For more information about how rustc works, see the rustc dev guide.