Inst

pub const Inst = struct

File

Code

pub const Inst = struct {
    tag: Tag,
    data: Data,
    ty: Interner.Ref,

    pub const Tag = enum {
        // data.constant
        // not included in blocks
        constant,

        // data.arg
        // not included in blocks
        arg,
        symbol,

        // data.label
        label,

        // data.block
        label_addr,
        jmp,

        // data.switch
        @"switch",

        // data.branch
        branch,
        select,

        // data.un
        jmp_val,

        // data.call
        call,

        // data.alloc
        alloc,

        // data.phi
        phi,

        // data.bin
        store,
        bit_or,
        bit_xor,
        bit_and,
        bit_shl,
        bit_shr,
        cmp_eq,
        cmp_ne,
        cmp_lt,
        cmp_lte,
        cmp_gt,
        cmp_gte,
        add,
        sub,
        mul,
        div,
        mod,

        // data.un
        ret,
        load,
        bit_not,
        negate,
        trunc,
        zext,
        sext,
    };

    pub const Data = union {
        constant: Interner.Ref,
        none: void,
        bin: struct {
            lhs: Ref,
            rhs: Ref,
        },
        un: Ref,
        arg: u32,
        alloc: struct {
            size: u32,
            @"align": u32,
        },
        @"switch": *Switch,
        call: *Call,
        label: [*:0]const u8,
        branch: *Branch,
        phi: Phi,
    };

    pub const Branch = struct {
        cond: Ref,
        then: Ref,
        @"else": Ref,
    };

    pub const Switch = struct {
        target: Ref,
        cases_len: u32,
        default: Ref,
        case_vals: [*]Interner.Ref,
        case_labels: [*]Ref,
    };

    pub const Call = struct {
        func: Ref,
        args_len: u32,
        args_ptr: [*]Ref,

        pub fn args(c: Call) []Ref {
            return c.args_ptr[0..c.args_len];
        }
    };

    pub const Phi = struct {
        ptr: [*]Ir.Ref,

        pub const Input = struct {
            label: Ir.Ref,
            value: Ir.Ref,
        };

        pub fn inputs(p: Phi) []Input {
            const len = @backingInt(p.ptr[0]) * 2;
            const slice = (p.ptr + 1)[0..len];
            return std.mem.bytesAsSlice(Input, std.mem.sliceAsBytes(slice));
        }
    };
}