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Rollup merge of #110190 - cbeuw:mir-offset, r=oli-obk

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Custom MIR: Support `BinOp::Offset`

Since offset doesn't have an infix operator, a new function `Offset` is added which is lowered to `Rvalue::BinaryOp(BinOp::Offset, ..)`

r? ```@oli-obk``` or ```@tmiasko``` or ```@JakobDegen```
This commit is contained in:
Matthias Krüger 2023-04-12 17:04:32 +02:00 • committed by GitHub
commit bb037e6fa7
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5
compiler/rustc_mir_build/src/build/custom/parse/instruction.rs
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@ -148,6 +148,11 @@ impl<'tcx, 'body> ParseCtxt<'tcx, 'body> {
)),
)
},
@call("mir_offset", args) => {
let ptr = self.parse_operand(args[0])?;
let offset = self.parse_operand(args[1])?;
Ok(Rvalue::BinaryOp(BinOp::Offset, Box::new((ptr, offset))))
},
@call("mir_len", args) => Ok(Rvalue::Len(self.parse_place(args[0])?)),
ExprKind::Borrow { borrow_kind, arg } => Ok(
Rvalue::Ref(self.tcx.lifetimes.re_erased, *borrow_kind, self.parse_place(*arg)?)