ir

src/ir/module.test.zig

@@ -0,0 +1,116 @@
+// Tests for module.zig
+const std = @import("std");
+const types = @import("types.zig");
+const inst_mod = @import("inst.zig");
+const mod_mod = @import("module.zig");
+
+const TypeId = types.TypeId;
+const Ref = inst_mod.Ref;
+const BlockId = inst_mod.BlockId;
+const FuncId = inst_mod.FuncId;
+const Function = inst_mod.Function;
+const GlobalId = inst_mod.GlobalId;
+const Module = mod_mod.Module;
+const Builder = mod_mod.Builder;
+
+test "Builder: build add(a: s64, b: s64) -> s64" {
+    const alloc = std.testing.allocator;
+    var mod = Module.init(alloc);
+    defer mod.deinit();
+
+    var b = Builder.init(&mod);
+
+    const name_add = mod.types.internString("add");
+    const name_a = mod.types.internString("a");
+    const name_b = mod.types.internString("b");
+    const name_entry = mod.types.internString("entry");
+
+    const params = &[_]Function.Param{
+        .{ .name = name_a, .ty = .s64 },
+        .{ .name = name_b, .ty = .s64 },
+    };
+    const func_id = b.beginFunction(name_add, params, .s64);
+
+    const entry = b.appendBlock(name_entry, &.{});
+    b.switchToBlock(entry);
+
+    // Load params (in real lowering, params are block params of entry)
+    const a_ref = b.constInt(0, .s64); // placeholder for param a
+    const b_ref = b.constInt(0, .s64); // placeholder for param b
+    const sum = b.add(a_ref, b_ref, .s64);
+    b.ret(sum, .s64);
+
+    b.finalize();
+
+    // Verify
+    const func = mod.getFunction(func_id);
+    try std.testing.expectEqual(@as(usize, 2), func.params.len);
+    try std.testing.expectEqual(TypeId.s64, func.ret);
+    try std.testing.expectEqual(@as(usize, 1), func.blocks.items.len);
+
+    const blk = &func.blocks.items[0];
+    try std.testing.expectEqual(@as(usize, 4), blk.insts.items.len); // 2 consts + add + ret
+}
+
+test "Builder: conditional branch" {
+    const alloc = std.testing.allocator;
+    var mod = Module.init(alloc);
+    defer mod.deinit();
+
+    var b = Builder.init(&mod);
+
+    const name_fn = mod.types.internString("test_fn");
+    const name_entry = mod.types.internString("entry");
+    const name_then = mod.types.internString("then");
+    const name_else = mod.types.internString("else");
+    const name_merge = mod.types.internString("merge");
+
+    _ = b.beginFunction(name_fn, &.{}, .s32);
+
+    const entry = b.appendBlock(name_entry, &.{});
+    const then_bb = b.appendBlock(name_then, &.{});
+    const else_bb = b.appendBlock(name_else, &.{});
+    const merge_bb = b.appendBlock(name_merge, &[_]TypeId{.s32});
+
+    b.switchToBlock(entry);
+    const cond = b.constBool(true);
+    b.condBr(cond, then_bb, &.{}, else_bb, &.{});
+
+    b.switchToBlock(then_bb);
+    const v1 = b.constInt(42, .s32);
+    b.br(merge_bb, &.{v1});
+
+    b.switchToBlock(else_bb);
+    const v2 = b.constInt(0, .s32);
+    b.br(merge_bb, &.{v2});
+
+    b.switchToBlock(merge_bb);
+    const result = b.emit(.{ .block_param = .{ .block = merge_bb, .param_index = 0 } }, .s32);
+    b.ret(result, .s32);
+
+    b.finalize();
+
+    // Verify: 4 blocks, correct instruction counts
+    const func = mod.getFunction(@enumFromInt(0));
+    try std.testing.expectEqual(@as(usize, 4), func.blocks.items.len);
+    try std.testing.expectEqual(@as(usize, 2), func.blocks.items[0].insts.items.len); // const_bool + cond_br
+    try std.testing.expectEqual(@as(usize, 2), func.blocks.items[1].insts.items.len); // const_int + br
+    try std.testing.expectEqual(@as(usize, 2), func.blocks.items[2].insts.items.len); // const_int + br
+    try std.testing.expectEqual(@as(usize, 2), func.blocks.items[3].insts.items.len); // block_param + ret
+}
+
+test "Module: globals" {
+    const alloc = std.testing.allocator;
+    var mod = Module.init(alloc);
+    defer mod.deinit();
+
+    const name = mod.types.internString("counter");
+    const id = mod.addGlobal(.{
+        .name = name,
+        .ty = .s32,
+        .init_val = .{ .int = 0 },
+    });
+
+    try std.testing.expectEqual(GlobalId.fromIndex(0), id);
+    try std.testing.expectEqual(TypeId.s32, mod.globals.items[0].ty);
+}