tiny.choir.product.hashing

1pub const maximum_attribute_depth: usize = 256;

1pub const maximum_operation_depth: usize = 256;

1const std = @import("std");2const ir = @import("../../core/root.zig");3const hashing = @import("root.zig");4const capacity = hashing.capacity;5const walk = hashing.walk;67const Allocator = std.mem.Allocator;89pub const ValueIndex = struct {10    entries: []capacity.ValueEntry,1112    pub fn init(allocator: Allocator, derived: capacity.Capacity) Allocator.Error!ValueIndex {13        return .{14            .entries = try allocator.alloc(capacity.ValueEntry, derived.facts.value_count),15        };16    }1718    pub fn deinit(self: *ValueIndex, allocator: Allocator) void {19        allocator.free(self.entries);20        self.* = undefined;21    }2223    pub fn fill(24        self: *ValueIndex,25        root: *ir.Operation,26        frames: []capacity.OperationFrame,27    ) error{ InputChanged, DuplicateValueDefinition }!void {28        var iterator = walk.Iterator.init(frames, root);29        var count: usize = 0;30        while (iterator.next()) |event| switch (event) {31            .operation => |operation| {32                for (operation.results.items) |*result| {33                    try self.append(result, &count);34                }35            },36            .region => {},37            .block => |block| {38                for (block.arguments.items) |argument| {39                    try self.append(argument, &count);40                }41            },42        };43        if (count != self.entries.len) return error.InputChanged;44        std.sort.heap(capacity.ValueEntry, self.entries, {}, lessThanEntry);45        if (self.entries.len > 1) {46            for (self.entries[1..], self.entries[0 .. self.entries.len - 1]) |current, previous| {47                if (current.value == previous.value) return error.DuplicateValueDefinition;48            }49        }50    }5152    pub fn lookup(self: *const ValueIndex, value: *const ir.Value) ?u64 {53        const address = @intFromPtr(value);54        var low: usize = 0;55        var high = self.entries.len;56        while (low < high) {57            const mid = low + (high - low) / 2;58            const candidate = self.entries[mid];59            const candidate_address = @intFromPtr(candidate.value);60            if (candidate_address < address) {61                low = mid + 1;62            } else if (candidate_address > address) {63                high = mid;64            } else {65                return candidate.id;66            }67        }68        return null;69    }7071    pub fn matchesDefinitions(72        self: *const ValueIndex,73        root: *ir.Operation,74        frames: []capacity.OperationFrame,75    ) bool {76        var iterator = walk.Iterator.init(frames, root);77        var count: u64 = 0;78        while (iterator.next()) |event| switch (event) {79            .operation => |operation| {80                for (operation.results.items) |*result| {81                    if (!self.matches(result, count)) return false;82                    count += 1;83                }84            },85            .region => {},86            .block => |block| {87                for (block.arguments.items) |argument| {88                    if (!self.matches(argument, count)) return false;89                    count += 1;90                }91            },92        };93        return count == self.entries.len;94    }9596    fn append(97        self: *ValueIndex,98        value: *const ir.Value,99        count: *usize,100    ) error{InputChanged}!void {101        if (count.* >= self.entries.len) return error.InputChanged;102        self.entries[count.*] = .{ .value = value, .id = @intCast(count.*) };103        count.* += 1;104    }105106    fn matches(self: *const ValueIndex, value: *const ir.Value, id: u64) bool {107        return self.lookup(value) == id;108    }109};110111fn lessThanEntry(_: void, lhs: capacity.ValueEntry, rhs: capacity.ValueEntry) bool {112    return @intFromPtr(lhs.value) < @intFromPtr(rhs.value);113}

1const std = @import("std");2const ir = @import("../../core/root.zig");34pub const capacity = @import("capacity.zig");5pub const index = @import("index.zig");6pub const numbering = @import("numbering.zig");7pub const stable = @import("stable.zig");8pub const walk = @import("walk.zig");910pub const maximum_operation_depth = capacity.maximum_operation_depth;11pub const maximum_attribute_depth = capacity.maximum_attribute_depth;12pub const StableHasher = stable.StableHasher;13pub const StableValueNumbering = numbering.StableValueNumbering;14pub const OperationFingerprintError = std.mem.Allocator.Error || capacity.InspectError || error{15    CapacityOverflow,16    DuplicateValueDefinition,17    InputChanged,18};1920pub fn operationFingerprint(21    allocator: std.mem.Allocator,22    operation: *ir.Operation,23) OperationFingerprintError!u64 {24    const limits = try StableHasher.Limits.inspect(operation);25    var hasher = try StableHasher.init(allocator, limits);26    defer hasher.deinit(allocator);27    hasher.activate() catch |err| switch (err) {28        error.AlreadyActive => unreachable,29        error.InputChanged => return error.InputChanged,30    };31    return hasher.fingerprint();32}

1pub const hashing = @import("hashing/root.zig");