shiftOp

fn shiftOp(
    gz: *GenZir,
    scope: *Scope,
    ri: ResultInfo,
    node: Ast.Node.Index,
    lhs_node: Ast.Node.Index,
    rhs_node: Ast.Node.Index,
    tag: Zir.Inst.Tag,
) InnerError!Zir.Inst.Ref {
    const lhs = try expr(gz, scope, .{ .rl = .none }, lhs_node);

    const cursor = switch (gz.astgen.tree.nodeTag(node)) {
        .shl, .shr => maybeAdvanceSourceCursorToMainToken(gz, node),
        else => undefined,
    };

    const log2_int_type = try gz.addUnNode(.typeof_log2_int_type, lhs, lhs_node);
    const rhs = try expr(gz, scope, .{ .rl = .{ .ty = log2_int_type }, .ctx = .shift_op }, rhs_node);

    switch (gz.astgen.tree.nodeTag(node)) {
        .shl, .shr => try emitDbgStmt(gz, cursor),
        else => undefined,
    }

    const result = try gz.addPlNode(tag, node, Zir.Inst.Bin{
        .lhs = lhs,
        .rhs = rhs,
    });
    return rvalue(gz, ri, result, node);
}