bjoernager/rust
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Implement checked Shl/Shr at MIR building.

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This commit is contained in:
Camille GILLOT 2023-02-13 21:08:15 +00:00
parent 43ee4d15bf
commit dd582bd7db
7 changed files with 109 additions and 107 deletions
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11
compiler/rustc_codegen_ssa/src/mir/rvalue.rs
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@ -663,17 +663,6 @@ impl<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>> FunctionCx<'a, 'tcx, Bx> {
};
bx.checked_binop(oop, input_ty, lhs, rhs)
}
mir::BinOp::Shl | mir::BinOp::Shr => {
let lhs_llty = bx.cx().val_ty(lhs);
let rhs_llty = bx.cx().val_ty(rhs);
let invert_mask = common::shift_mask_val(bx, lhs_llty, rhs_llty, true);
let outer_bits = bx.and(rhs, invert_mask);
let of = bx.icmp(IntPredicate::IntNE, outer_bits, bx.cx().const_null(rhs_llty));
let val = self.codegen_scalar_binop(bx, op, lhs, rhs, input_ty);
(val, of)
}
_ => bug!("Operator `{:?}` is not a checkable operator", op),
};