Merge pull request #11762 from Vexu/stage2

Stage2 fixes

Author: andrewrk

src/Sema.zig

@@ -2976,7 +2976,7 @@ fn zirResolveInferredAlloc(sema: *Sema, block: *Block, inst: Zir.Inst.Index) Com
 
                 // Even though we reuse the constant instruction, we still remove it from the
                 // block so that codegen does not see it.
-                block.instructions.shrinkRetainingCapacity(block.instructions.items.len - 3);
+                block.instructions.shrinkRetainingCapacity(search_index);
                 sema.air_values.items[value_index] = try Value.Tag.decl_ref.create(sema.arena, new_decl_index);
                 // if bitcast ty ref needs to be made const, make_ptr_const
                 // ZIR handles it later, so we can just use the ty ref here.
@@ -13011,10 +13011,13 @@ fn analyzeRet(
     const backend_supports_error_return_tracing =
         sema.mod.comp.bin_file.options.use_llvm;
 
-    if ((sema.fn_ret_ty.zigTypeTag() == .ErrorSet or sema.typeOf(uncasted_operand).zigTypeTag() == .ErrorUnion) and
+    if (sema.fn_ret_ty.isError() and
         sema.mod.comp.bin_file.options.error_return_tracing and
         backend_supports_error_return_tracing)
-    {
+    ret_err: {
+        if (try sema.resolveMaybeUndefVal(block, src, operand)) |ret_val| {
+            if (ret_val.tag() != .@"error") break :ret_err;
+        }
         const return_err_fn = try sema.getBuiltin(block, src, "returnError");
         const unresolved_stack_trace_ty = try sema.getBuiltinType(block, src, "StackTrace");
         const stack_trace_ty = try sema.resolveTypeFields(block, src, unresolved_stack_trace_ty);

src/type.zig

@@ -640,16 +640,16 @@ pub const Type = extern union {
                 if (!eql(a_info.return_type, b_info.return_type, mod))
                     return false;
 
-                if (a_info.cc != b_info.cc)
+                if (a_info.is_var_args != b_info.is_var_args)
                     return false;
 
-                if (a_info.alignment != b_info.alignment)
+                if (a_info.is_generic != b_info.is_generic)
                     return false;
 
-                if (a_info.is_var_args != b_info.is_var_args)
+                if (!a_info.cc_is_generic and a_info.cc != b_info.cc)
                     return false;
 
-                if (a_info.is_generic != b_info.is_generic)
+                if (!a_info.align_is_generic and a_info.alignment != b_info.alignment)
                     return false;
 
                 if (a_info.param_types.len != b_info.param_types.len)
@@ -1036,9 +1036,15 @@ pub const Type = extern union {
                 std.hash.autoHash(hasher, std.builtin.TypeId.Fn);
 
                 const fn_info = ty.fnInfo();
-                hashWithHasher(fn_info.return_type, hasher, mod);
-                std.hash.autoHash(hasher, fn_info.alignment);
-                std.hash.autoHash(hasher, fn_info.cc);
+                if (fn_info.return_type.tag() != .generic_poison) {
+                    hashWithHasher(fn_info.return_type, hasher, mod);
+                }
+                if (!fn_info.align_is_generic) {
+                    std.hash.autoHash(hasher, fn_info.alignment);
+                }
+                if (!fn_info.cc_is_generic) {
+                    std.hash.autoHash(hasher, fn_info.cc);
+                }
                 std.hash.autoHash(hasher, fn_info.is_var_args);
                 std.hash.autoHash(hasher, fn_info.is_generic);
 

test/behavior/basic.zig

@@ -977,3 +977,31 @@ test "weird array and tuple initializations" {
         .b = if (a) .{ .e = .a } else .{ .e = .b },
     };
 }
+
+test "array type comes from generic function" {
+    const S = struct {
+        fn A() type {
+            return struct { a: u8 = 0 };
+        }
+    };
+    const args = [_]S.A(){.{}};
+    _ = args;
+}
+
+test "generic function uses return type of other generic function" {
+    if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
+
+    const S = struct {
+        fn call(
+            f: anytype,
+            args: anytype,
+        ) @TypeOf(@call(.{}, f, @as(@TypeOf(args), undefined))) {
+            return @call(.{}, f, args);
+        }
+
+        fn func(arg: anytype) @TypeOf(arg) {
+            return arg;
+        }
+    };
+    try std.testing.expect(S.call(S.func, .{@as(u8, 1)}) == 1);
+}