negation

fn negation(
    gz: *GenZir,
    scope: *Scope,
    ri: ResultInfo,
    node: Ast.Node.Index,
) InnerError!Zir.Inst.Ref {
    const astgen = gz.astgen;
    const tree = astgen.tree;

    // Check for float literal as the sub-expression because we want to preserve
    // its negativity rather than having it go through comptime subtraction.
    const operand_node = tree.nodeData(node).node;
    if (tree.nodeTag(operand_node) == .number_literal) {
        return numberLiteral(gz, ri, operand_node, node, .negative);
    }

    const operand = try expr(gz, scope, .{ .rl = .none }, operand_node);
    const result = try gz.addUnNode(.negate, operand, node);
    return rvalue(gz, ri, result, node);
}