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// Copyright 2021 The Tint Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "src/tint/ast/transform/promote_initializers_to_let.h"
#include "src/tint/ast/transform/test_helper.h"
namespace tint::ast::transform {
namespace {
using PromoteInitializersToLetTest = TransformTest;
TEST_F(PromoteInitializersToLetTest, EmptyModule) {
auto* src = "";
auto* expect = "";
auto got = Run<PromoteInitializersToLet>(src);
EXPECT_EQ(expect, str(got));
}
TEST_F(PromoteInitializersToLetTest, BasicConstArray) {
auto* src = R"(
fn f() {
const f0 = 1.0;
const f1 = 2.0;
const f2 = 3.0;
const f3 = 4.0;
var i = array<f32, 4u>(f0, f1, f2, f3)[2];
}
)";
EXPECT_FALSE(ShouldRun<PromoteInitializersToLet>(src));
}
TEST_F(PromoteInitializersToLetTest, BasicRuntimeArray) {
auto* src = R"(
fn f() {
var f0 = 1.0;
var f1 = 2.0;
var f2 = 3.0;
var f3 = 4.0;
var i = array<f32, 4u>(f0, f1, f2, f3)[2];
}
)";
auto* expect = R"(
fn f() {
var f0 = 1.0;
var f1 = 2.0;
var f2 = 3.0;
var f3 = 4.0;
let tint_symbol : array<f32, 4u> = array<f32, 4u>(f0, f1, f2, f3);
var i = tint_symbol[2];
}
)";
auto got = Run<PromoteInitializersToLet>(src);
EXPECT_EQ(expect, str(got));
}
TEST_F(PromoteInitializersToLetTest, BasicConstStruct) {
auto* src = R"(
struct S {
a : i32,
b : f32,
c : vec3<f32>,
};
fn f() {
var x = S(1, 2.0, vec3<f32>()).b;
}
)";
EXPECT_FALSE(ShouldRun<PromoteInitializersToLet>(src));
}
TEST_F(PromoteInitializersToLetTest, BasicRuntimeStruct) {
auto* src = R"(
struct S {
a : i32,
b : f32,
c : vec3<f32>,
};
fn f() {
let runtime_value = 1;
var x = S(runtime_value, 2.0, vec3<f32>()).b;
}
)";
auto* expect = R"(
struct S {
a : i32,
b : f32,
c : vec3<f32>,
}
fn f() {
let runtime_value = 1;
let tint_symbol : S = S(runtime_value, 2.0, vec3<f32>());
var x = tint_symbol.b;
}
)";
auto got = Run<PromoteInitializersToLet>(src);
EXPECT_EQ(expect, str(got));
}
TEST_F(PromoteInitializersToLetTest, BasicStruct_OutOfOrder) {
auto* src = R"(
fn f() {
let runtime_value = 1;
var x = S(runtime_value, 2.0, vec3<f32>()).b;
}
struct S {
a : i32,
b : f32,
c : vec3<f32>,
};
)";
auto* expect = R"(
fn f() {
let runtime_value = 1;
let tint_symbol : S = S(runtime_value, 2.0, vec3<f32>());
var x = tint_symbol.b;
}
struct S {
a : i32,
b : f32,
c : vec3<f32>,
}
)";
auto got = Run<PromoteInitializersToLet>(src);
EXPECT_EQ(expect, str(got));
}
TEST_F(PromoteInitializersToLetTest, GlobalConstBasicArray) {
auto* src = R"(
const f0 = 1.0;
const f1 = 2.0;
const C = array<f32, 2u>(f0, f1);
fn f() {
var f0 = 100.0;
var f1 = 100.0;
var i = C[1]; // Not hoisted, as the final const value is not an array
}
)";
EXPECT_FALSE(ShouldRun<PromoteInitializersToLet>(src));
}
TEST_F(PromoteInitializersToLetTest, GlobalConstBasicArray_OutOfOrder) {
auto* src = R"(
fn f() {
var f0 = 100.0;
var f1 = 100.0;
var i = C[1];
}
const C = array<f32, 2u>(f0, f1);
const f0 = 1.0;
const f1 = 2.0;
)";
EXPECT_FALSE(ShouldRun<PromoteInitializersToLet>(src));
}
TEST_F(PromoteInitializersToLetTest, GlobalConstArrayDynamicIndex) {
auto* src = R"(
const TRI_VERTICES = array(
vec4(0., 0., 0., 1.),
vec4(0., 1., 0., 1.),
vec4(1., 1., 0., 1.),
);
@vertex
fn vs_main(@builtin(vertex_index) in_vertex_index: u32) -> @builtin(position) vec4<f32> {
// note: TRI_VERTICES requires a materialize before the dynamic index.
return TRI_VERTICES[in_vertex_index];
}
)";
auto* expect = R"(
const TRI_VERTICES = array(vec4(0.0, 0.0, 0.0, 1.0), vec4(0.0, 1.0, 0.0, 1.0), vec4(1.0, 1.0, 0.0, 1.0));
@vertex
fn vs_main(@builtin(vertex_index) in_vertex_index : u32) -> @builtin(position) vec4<f32> {
let tint_symbol : array<vec4<f32>, 3u> = TRI_VERTICES;
return tint_symbol[in_vertex_index];
}
)";
auto got = Run<PromoteInitializersToLet>(src);
EXPECT_EQ(expect, str(got));
}
TEST_F(PromoteInitializersToLetTest, LocalConstBasicArray) {
auto* src = R"(
fn f() {
const f0 = 1.0;
const f1 = 2.0;
const C = array<f32, 2u>(f0, f1);
var i = C[1]; // Not hoisted, as the final const value is not an array
}
)";
EXPECT_FALSE(ShouldRun<PromoteInitializersToLet>(src));
}
TEST_F(PromoteInitializersToLetTest, LocalConstBasicArrayRuntimeIndex) {
auto* src = R"(
fn f() {
const f0 = 1.0;
const f1 = 2.0;
const C = array<f32, 2u>(f0, f1);
let runtime_value = 1;
var i = C[runtime_value];
}
)";
auto* expect = R"(
fn f() {
const f0 = 1.0;
const f1 = 2.0;
const C = array<f32, 2u>(f0, f1);
let runtime_value = 1;
let tint_symbol : array<f32, 2u> = C;
var i = tint_symbol[runtime_value];
}
)";
auto got = Run<PromoteInitializersToLet>(src);
EXPECT_EQ(expect, str(got));
}
TEST_F(PromoteInitializersToLetTest, ArrayInForLoopInit) {
auto* src = R"(
fn f() {
var insert_after = 1;
for(var i = array<f32, 4u>(0.0, 1.0, 2.0, 3.0)[insert_after]; ; ) {
break;
}
}
)";
auto* expect = R"(
fn f() {
var insert_after = 1;
{
let tint_symbol : array<f32, 4u> = array<f32, 4u>(0.0, 1.0, 2.0, 3.0);
var i = tint_symbol[insert_after];
loop {
{
break;
}
}
}
}
)";
auto got = Run<PromoteInitializersToLet>(src);
EXPECT_EQ(expect, str(got));
}
TEST_F(PromoteInitializersToLetTest, LocalConstArrayInForLoopInit) {
auto* src = R"(
fn f() {
const arr = array<f32, 4u>(0.0, 1.0, 2.0, 3.0);
let runtime_value = 1;
var insert_after = 1;
for(var i = arr[runtime_value]; ; ) {
break;
}
}
)";
auto* expect = R"(
fn f() {
const arr = array<f32, 4u>(0.0, 1.0, 2.0, 3.0);
let runtime_value = 1;
var insert_after = 1;
{
let tint_symbol : array<f32, 4u> = arr;
var i = tint_symbol[runtime_value];
loop {
{
break;
}
}
}
}
)";
auto got = Run<PromoteInitializersToLet>(src);
EXPECT_EQ(expect, str(got));
}
TEST_F(PromoteInitializersToLetTest, GlobalConstArrayInForLoopInit) {
auto* src = R"(
const arr = array<f32, 4u>(0.0, 1.0, 2.0, 3.0);
fn f() {
let runtime_value = 1;
var insert_after = 1;
for(var i = arr[runtime_value]; ; ) {
break;
}
}
)";
auto* expect = R"(
const arr = array<f32, 4u>(0.0, 1.0, 2.0, 3.0);
fn f() {
let runtime_value = 1;
var insert_after = 1;
{
let tint_symbol : array<f32, 4u> = arr;
var i = tint_symbol[runtime_value];
loop {
{
break;
}
}
}
}
)";
auto got = Run<PromoteInitializersToLet>(src);
EXPECT_EQ(expect, str(got));
}
TEST_F(PromoteInitializersToLetTest, StructInForLoopInit) {
auto* src = R"(
struct S {
a : i32,
b : f32,
c : vec3<f32>,
};
fn get_b_runtime(s : S) -> f32 {
return s.b;
}
fn f() {
var insert_after = 1;
for(var x = get_b_runtime(S(1, 2.0, vec3<f32>())); ; ) {
break;
}
}
)";
auto* expect = R"(
struct S {
a : i32,
b : f32,
c : vec3<f32>,
}
fn get_b_runtime(s : S) -> f32 {
return s.b;
}
fn f() {
var insert_after = 1;
{
let tint_symbol : S = S(1, 2.0, vec3<f32>());
var x = get_b_runtime(tint_symbol);
loop {
{
break;
}
}
}
}
)";
auto got = Run<PromoteInitializersToLet>(src);
EXPECT_EQ(expect, str(got));
}
TEST_F(PromoteInitializersToLetTest, StructInForLoopInit_OutOfOrder) {
auto* src = R"(
fn f() {
var insert_after = 1;
for(var x = get_b_runtime(S(1, 2.0, vec3<f32>())); ; ) {
break;
}
}
fn get_b_runtime(s : S) -> f32 {
return s.b;
}
struct S {
a : i32,
b : f32,
c : vec3<f32>,
};
)";
auto* expect = R"(
fn f() {
var insert_after = 1;
{
let tint_symbol : S = S(1, 2.0, vec3<f32>());
var x = get_b_runtime(tint_symbol);
loop {
{
break;
}
}
}
}
fn get_b_runtime(s : S) -> f32 {
return s.b;
}
struct S {
a : i32,
b : f32,
c : vec3<f32>,
}
)";
auto got = Run<PromoteInitializersToLet>(src);
EXPECT_EQ(expect, str(got));
}
TEST_F(PromoteInitializersToLetTest, ArrayInForLoopCond) {
auto* src = R"(
fn f() {
var f = 1.0;
for(; f == array<f32, 1u>(f)[0]; f = f + 1.0) {
var marker = 1;
}
}
)";
auto* expect = R"(
fn f() {
var f = 1.0;
loop {
let tint_symbol : array<f32, 1u> = array<f32, 1u>(f);
if (!((f == tint_symbol[0]))) {
break;
}
{
var marker = 1;
}
continuing {
f = (f + 1.0);
}
}
}
)";
auto got = Run<PromoteInitializersToLet>(src);
EXPECT_EQ(expect, str(got));
}
TEST_F(PromoteInitializersToLetTest, LocalConstArrayInForLoopCond) {
auto* src = R"(
fn f() {
let runtime_value = 0;
const f = 1.0;
const arr = array<f32, 1u>(f);
for(var i = f; i == arr[runtime_value]; i = i + 1.0) {
var marker = 1;
}
}
)";
auto* expect = R"(
fn f() {
let runtime_value = 0;
const f = 1.0;
const arr = array<f32, 1u>(f);
{
var i = f;
loop {
let tint_symbol : array<f32, 1u> = arr;
if (!((i == tint_symbol[runtime_value]))) {
break;
}
{
var marker = 1;
}
continuing {
i = (i + 1.0);
}
}
}
}
)";
auto got = Run<PromoteInitializersToLet>(src);
EXPECT_EQ(expect, str(got));
}
TEST_F(PromoteInitializersToLetTest, GlobalConstArrayInForLoopCond) {
auto* src = R"(
const f = 1.0;
const arr = array<f32, 1u>(f);
fn F() {
let runtime_value = 0;
for(var i = f; i == arr[runtime_value]; i = i + 1.0) {
var marker = 1;
}
}
)";
auto* expect = R"(
const f = 1.0;
const arr = array<f32, 1u>(f);
fn F() {
let runtime_value = 0;
{
var i = f;
loop {
let tint_symbol : array<f32, 1u> = arr;
if (!((i == tint_symbol[runtime_value]))) {
break;
}
{
var marker = 1;
}
continuing {
i = (i + 1.0);
}
}
}
}
)";
auto got = Run<PromoteInitializersToLet>(src);
EXPECT_EQ(expect, str(got));
}
TEST_F(PromoteInitializersToLetTest, ArrayInForLoopCont) {
auto* src = R"(
fn f() {
let runtime_value = 0;
var f = 0.0;
for(; f < 10.0; f = f + array<f32, 1u>(1.0)[runtime_value]) {
var marker = 1;
}
}
)";
auto* expect = R"(
fn f() {
let runtime_value = 0;
var f = 0.0;
loop {
if (!((f < 10.0))) {
break;
}
{
var marker = 1;
}
continuing {
let tint_symbol : array<f32, 1u> = array<f32, 1u>(1.0);
f = (f + tint_symbol[runtime_value]);
}
}
}
)";
auto got = Run<PromoteInitializersToLet>(src);
EXPECT_EQ(expect, str(got));
}
TEST_F(PromoteInitializersToLetTest, LocalConstArrayInForLoopCont) {
auto* src = R"(
fn f() {
let runtime_value = 0;
const arr = array<f32, 1u>(1.0);
var f = 0.0;
for(; f < 10.0; f = f + arr[runtime_value]) {
var marker = 1;
}
}
)";
auto* expect = R"(
fn f() {
let runtime_value = 0;
const arr = array<f32, 1u>(1.0);
var f = 0.0;
loop {
if (!((f < 10.0))) {
break;
}
{
var marker = 1;
}
continuing {
let tint_symbol : array<f32, 1u> = arr;
f = (f + tint_symbol[runtime_value]);
}
}
}
)";
auto got = Run<PromoteInitializersToLet>(src);
EXPECT_EQ(expect, str(got));
}
TEST_F(PromoteInitializersToLetTest, GlobalConstArrayInForLoopCont) {
auto* src = R"(
const arr = array<f32, 1u>(1.0);
fn f() {
let runtime_value = 0;
var f = 0.0;
for(; f < 10.0; f = f + arr[runtime_value]) {
var marker = 1;
}
}
)";
auto* expect = R"(
const arr = array<f32, 1u>(1.0);
fn f() {
let runtime_value = 0;
var f = 0.0;
loop {
if (!((f < 10.0))) {
break;
}
{
var marker = 1;
}
continuing {
let tint_symbol : array<f32, 1u> = arr;
f = (f + tint_symbol[runtime_value]);
}
}
}
)";
auto got = Run<PromoteInitializersToLet>(src);
EXPECT_EQ(expect, str(got));
}
TEST_F(PromoteInitializersToLetTest, ArrayInForLoopInitCondCont) {
auto* src = R"(
fn f() {
let runtime_value = 0;
for(var f = array<f32, 1u>(0.0)[runtime_value];
f < array<f32, 1u>(1.0)[runtime_value];
f = f + array<f32, 1u>(2.0)[runtime_value]) {
var marker = 1;
}
}
)";
auto* expect = R"(
fn f() {
let runtime_value = 0;
{
let tint_symbol : array<f32, 1u> = array<f32, 1u>(0.0);
var f = tint_symbol[runtime_value];
loop {
let tint_symbol_1 : array<f32, 1u> = array<f32, 1u>(1.0);
if (!((f < tint_symbol_1[runtime_value]))) {
break;
}
{
var marker = 1;
}
continuing {
let tint_symbol_2 : array<f32, 1u> = array<f32, 1u>(2.0);
f = (f + tint_symbol_2[runtime_value]);
}
}
}
}
)";
auto got = Run<PromoteInitializersToLet>(src);
EXPECT_EQ(expect, str(got));
}
TEST_F(PromoteInitializersToLetTest, LocalConstArrayInForLoopInitCondCont) {
auto* src = R"(
fn f() {
let runtime_value = 0;
const arr_a = array<f32, 1u>(0.0);
const arr_b = array<f32, 1u>(1.0);
const arr_c = array<f32, 1u>(2.0);
for(var f = arr_a[runtime_value]; f < arr_b[runtime_value]; f = f + arr_c[runtime_value]) {
var marker = 1;
}
}
)";
auto* expect = R"(
fn f() {
let runtime_value = 0;
const arr_a = array<f32, 1u>(0.0);
const arr_b = array<f32, 1u>(1.0);
const arr_c = array<f32, 1u>(2.0);
{
let tint_symbol : array<f32, 1u> = arr_a;
var f = tint_symbol[runtime_value];
loop {
let tint_symbol_1 : array<f32, 1u> = arr_b;
if (!((f < tint_symbol_1[runtime_value]))) {
break;
}
{
var marker = 1;
}
continuing {
let tint_symbol_2 : array<f32, 1u> = arr_c;
f = (f + tint_symbol_2[runtime_value]);
}
}
}
}
)";
auto got = Run<PromoteInitializersToLet>(src);
EXPECT_EQ(expect, str(got));
}
TEST_F(PromoteInitializersToLetTest, ArrayInElseIf) {
auto* src = R"(
fn f() {
var f = 1.0;
if (true) {
var marker = 0;
} else if (f == array<f32, 2u>(f, f)[0]) {
var marker = 1;
}
}
)";
auto* expect = R"(
fn f() {
var f = 1.0;
if (true) {
var marker = 0;
} else {
let tint_symbol : array<f32, 2u> = array<f32, 2u>(f, f);
if ((f == tint_symbol[0])) {
var marker = 1;
}
}
}
)";
auto got = Run<PromoteInitializersToLet>(src);
EXPECT_EQ(expect, str(got));
}
TEST_F(PromoteInitializersToLetTest, ArrayInElseIfChain) {
auto* src = R"(
fn f() {
var f = 1.0;
if (true) {
var marker = 0;
} else if (true) {
var marker = 1;
} else if (f == array<f32, 2u>(f, f)[0]) {
var marker = 2;
} else if (f == array<f32, 2u>(f, f)[1]) {
var marker = 3;
} else if (true) {
var marker = 4;
} else {
var marker = 5;
}
}
)";
auto* expect = R"(
fn f() {
var f = 1.0;
if (true) {
var marker = 0;
} else if (true) {
var marker = 1;
} else {
let tint_symbol : array<f32, 2u> = array<f32, 2u>(f, f);
if ((f == tint_symbol[0])) {
var marker = 2;
} else {
let tint_symbol_1 : array<f32, 2u> = array<f32, 2u>(f, f);
if ((f == tint_symbol_1[1])) {
var marker = 3;
} else if (true) {
var marker = 4;
} else {
var marker = 5;
}
}
}
}
)";
auto got = Run<PromoteInitializersToLet>(src);
EXPECT_EQ(expect, str(got));
}
TEST_F(PromoteInitializersToLetTest, LocalConstArrayInElseIfChain) {
auto* src = R"(
fn f() {
let runtime_value = 0;
const f = 1.0;
const arr = array<f32, 2u>(f, f);
if (true) {
var marker = 0;
} else if (true) {
var marker = 1;
} else if (f == arr[runtime_value]) {
var marker = 2;
} else if (f == arr[runtime_value + 1]) {
var marker = 3;
} else if (true) {
var marker = 4;
} else {
var marker = 5;
}
}
)";
auto* expect = R"(
fn f() {
let runtime_value = 0;
const f = 1.0;
const arr = array<f32, 2u>(f, f);
if (true) {
var marker = 0;
} else if (true) {
var marker = 1;
} else {
let tint_symbol : array<f32, 2u> = arr;
if ((f == tint_symbol[runtime_value])) {
var marker = 2;
} else {
let tint_symbol_1 : array<f32, 2u> = arr;
if ((f == tint_symbol_1[(runtime_value + 1)])) {
var marker = 3;
} else if (true) {
var marker = 4;
} else {
var marker = 5;
}
}
}
}
)";
auto got = Run<PromoteInitializersToLet>(src);
EXPECT_EQ(expect, str(got));
}
TEST_F(PromoteInitializersToLetTest, GlobalConstArrayInElseIfChain) {
auto* src = R"(
const f = 1.0;
const arr = array<f32, 2u>(f, f);
fn F() {
let runtime_value = 0;
if (true) {
var marker = 0;
} else if (true) {
var marker = 1;
} else if (f == arr[runtime_value]) {
var marker = 2;
} else if (f == arr[runtime_value + 1]) {
var marker = 3;
} else if (true) {
var marker = 4;
} else {
var marker = 5;
}
}
)";
auto* expect = R"(
const f = 1.0;
const arr = array<f32, 2u>(f, f);
fn F() {
let runtime_value = 0;
if (true) {
var marker = 0;
} else if (true) {
var marker = 1;
} else {
let tint_symbol : array<f32, 2u> = arr;
if ((f == tint_symbol[runtime_value])) {
var marker = 2;
} else {
let tint_symbol_1 : array<f32, 2u> = arr;
if ((f == tint_symbol_1[(runtime_value + 1)])) {
var marker = 3;
} else if (true) {
var marker = 4;
} else {
var marker = 5;
}
}
}
}
)";
auto got = Run<PromoteInitializersToLet>(src);
EXPECT_EQ(expect, str(got));
}
TEST_F(PromoteInitializersToLetTest, ArrayInArrayArrayConstIndex) {
auto* src = R"(
fn f() {
var i = array<array<f32, 2u>, 2u>(array<f32, 2u>(1.0, 2.0), array<f32, 2u>(3.0, 4.0))[0][1];
}
)";
EXPECT_FALSE(ShouldRun<PromoteInitializersToLet>(src));
}
TEST_F(PromoteInitializersToLetTest, ArrayInArrayArrayRuntimeIndex) {
auto* src = R"(
fn f() {
let runtime_value = 1;
var i = array<array<f32, 2u>, 2u>(array<f32, 2u>(1.0, 2.0), array<f32, 2u>(3.0, 4.0))[runtime_value][runtime_value + 1];
}
)";
auto* expect = R"(
fn f() {
let runtime_value = 1;
let tint_symbol : array<array<f32, 2u>, 2u> = array<array<f32, 2u>, 2u>(array<f32, 2u>(1.0, 2.0), array<f32, 2u>(3.0, 4.0));
var i = tint_symbol[runtime_value][(runtime_value + 1)];
}
)";
auto got = Run<PromoteInitializersToLet>(src);
EXPECT_EQ(expect, str(got));
}
TEST_F(PromoteInitializersToLetTest, LocalConstArrayInArrayArrayConstIndex) {
auto* src = R"(
fn f() {
const arr_0 = array<f32, 2u>(1.0, 2.0);
const arr_1 = array<f32, 2u>(3.0, 4.0);
const arr_2 = array<array<f32, 2u>, 2u>(arr_0, arr_1);
var i = arr_2[0][1];
}
)";
EXPECT_FALSE(ShouldRun<PromoteInitializersToLet>(src));
}
TEST_F(PromoteInitializersToLetTest, LocalConstArrayInArrayArrayRuntimeIndex) {
auto* src = R"(
fn f() {
let runtime_value = 1;
const arr_0 = array<f32, 2u>(1.0, 2.0);
const arr_1 = array<f32, 2u>(3.0, 4.0);
const arr_2 = array<array<f32, 2u>, 2u>(arr_0, arr_1);
var i = arr_2[runtime_value][runtime_value + 1];
}
)";
auto* expect = R"(
fn f() {
let runtime_value = 1;
const arr_0 = array<f32, 2u>(1.0, 2.0);
const arr_1 = array<f32, 2u>(3.0, 4.0);
const arr_2 = array<array<f32, 2u>, 2u>(arr_0, arr_1);
let tint_symbol : array<array<f32, 2u>, 2u> = arr_2;
var i = tint_symbol[runtime_value][(runtime_value + 1)];
}
)";
auto got = Run<PromoteInitializersToLet>(src);
EXPECT_EQ(expect, str(got));
}
TEST_F(PromoteInitializersToLetTest, GlobalConstArrayInArrayArray) {
auto* src = R"(
const arr_0 = array<f32, 2u>(1.0, 2.0);
const arr_1 = array<f32, 2u>(3.0, 4.0);
const arr_2 = array<array<f32, 2u>, 2u>(arr_0, arr_1);
fn f() {
let runtime_value = 1;
var i = arr_2[runtime_value][runtime_value + 1];
}
)";
auto* expect = R"(
const arr_0 = array<f32, 2u>(1.0, 2.0);
const arr_1 = array<f32, 2u>(3.0, 4.0);
const arr_2 = array<array<f32, 2u>, 2u>(arr_0, arr_1);
fn f() {
let runtime_value = 1;
let tint_symbol : array<array<f32, 2u>, 2u> = arr_2;
var i = tint_symbol[runtime_value][(runtime_value + 1)];
}
)";
auto got = Run<PromoteInitializersToLet>(src);
EXPECT_EQ(expect, str(got));
}
TEST_F(PromoteInitializersToLetTest, StructNested) {
auto* src = R"(
struct S1 {
a : i32,
};
struct S2 {
a : i32,
b : S1,
c : i32,
};
struct S3 {
a : S2,
};
fn get_a(s : S3) -> S2 {
return s.a;
}
fn f() {
var x = get_a(S3(S2(1, S1(2), 3))).b.a;
}
)";
auto* expect = R"(
struct S1 {
a : i32,
}
struct S2 {
a : i32,
b : S1,
c : i32,
}
struct S3 {
a : S2,
}
fn get_a(s : S3) -> S2 {
return s.a;
}
fn f() {
let tint_symbol : S3 = S3(S2(1, S1(2), 3));
var x = get_a(tint_symbol).b.a;
}
)";
auto got = Run<PromoteInitializersToLet>(src);
EXPECT_EQ(expect, str(got));
}
TEST_F(PromoteInitializersToLetTest, Mixed) {
auto* src = R"(
struct S1 {
a : i32,
};
struct S2 {
a : array<S1, 3u>,
};
fn get_a(s : S2) -> array<S1, 3u> {
return s.a;
}
fn f() {
var x = get_a(S2(array<S1, 3u>(S1(1), S1(2), S1(3))))[1].a;
}
)";
auto* expect = R"(
struct S1 {
a : i32,
}
struct S2 {
a : array<S1, 3u>,
}
fn get_a(s : S2) -> array<S1, 3u> {
return s.a;
}
fn f() {
let tint_symbol : S2 = S2(array<S1, 3u>(S1(1), S1(2), S1(3)));
var x = get_a(tint_symbol)[1].a;
}
)";
auto got = Run<PromoteInitializersToLet>(src);
EXPECT_EQ(expect, str(got));
}
TEST_F(PromoteInitializersToLetTest, Mixed_OutOfOrder) {
auto* src = R"(
fn f() {
var x = get_a(S2(array<S1, 3u>(S1(1), S1(2), S1(3))))[1].a;
}
fn get_a(s : S2) -> array<S1, 3u> {
return s.a;
}
struct S2 {
a : array<S1, 3u>,
};
struct S1 {
a : i32,
};
)";
auto* expect = R"(
fn f() {
let tint_symbol : S2 = S2(array<S1, 3u>(S1(1), S1(2), S1(3)));
var x = get_a(tint_symbol)[1].a;
}
fn get_a(s : S2) -> array<S1, 3u> {
return s.a;
}
struct S2 {
a : array<S1, 3u>,
}
struct S1 {
a : i32,
}
)";
auto got = Run<PromoteInitializersToLet>(src);
EXPECT_EQ(expect, str(got));
}
TEST_F(PromoteInitializersToLetTest, NoChangeOnVarDecl) {
auto* src = R"(
alias F = f32;
fn f() {
var local_arr = array<f32, 4u>(0.0, 1.0, 2.0, 3.0);
var local_str = F(3.0);
}
const module_arr : array<f32, 4u> = array<f32, 4u>(0.0, 1.0, 2.0, 3.0);
const module_str : F = F(2.0);
)";
auto* expect = src;
auto got = Run<PromoteInitializersToLet>(src);
EXPECT_EQ(expect, str(got));
}
TEST_F(PromoteInitializersToLetTest, NoChangeOnVarDecl_OutOfOrder) {
auto* src = R"(
fn f() {
var local_arr = array<f32, 4u>(0.0, 1.0, 2.0, 3.0);
var local_str = F(3.0);
}
const module_str : F = F(2.0);
alias F = f32;
const module_arr : array<f32, 4u> = array<f32, 4u>(0.0, 1.0, 2.0, 3.0);
)";
auto* expect = src;
auto got = Run<PromoteInitializersToLet>(src);
EXPECT_EQ(expect, str(got));
}
TEST_F(PromoteInitializersToLetTest, ForLoopShadowing) {
auto* src = R"(
fn X() {
var i = 10;
for(var f = 0; f < 10; f = f + array<i32, 1u>(i)[0]) {
var i = 20;
}
}
fn Y() {
var i = 10;
for(var f = 0; f < array<i32, 1u>(i)[0]; f = f + 1) {
var i = 20;
}
}
fn Z() {
var i = 10;
for(var f = array<i32, 1u>(i)[0]; f < 10; f = f + 1) {
var i = 20;
}
}
)";
auto* expect = R"(
fn X() {
var i = 10;
{
var f = 0;
loop {
if (!((f < 10))) {
break;
}
{
var i = 20;
}
continuing {
let tint_symbol : array<i32, 1u> = array<i32, 1u>(i);
f = (f + tint_symbol[0]);
}
}
}
}
fn Y() {
var i = 10;
{
var f = 0;
loop {
let tint_symbol_1 : array<i32, 1u> = array<i32, 1u>(i);
if (!((f < tint_symbol_1[0]))) {
break;
}
{
var i = 20;
}
continuing {
f = (f + 1);
}
}
}
}
fn Z() {
var i = 10;
{
let tint_symbol_2 : array<i32, 1u> = array<i32, 1u>(i);
var f = tint_symbol_2[0];
loop {
if (!((f < 10))) {
break;
}
{
var i = 20;
}
continuing {
f = (f + 1);
}
}
}
}
)";
auto got = Run<PromoteInitializersToLet>(src);
EXPECT_EQ(expect, str(got));
}
TEST_F(PromoteInitializersToLetTest, AssignAbstractArray) {
// Test that hoisting an array with abstract type still materializes to the correct type.
auto* src = R"(
fn f() {
var arr : array<f32, 4>;
arr = array(1, 2, 3, 4);
}
)";
auto* expect = R"(
fn f() {
var arr : array<f32, 4>;
let tint_symbol : array<f32, 4u> = array(1, 2, 3, 4);
arr = tint_symbol;
}
)";
auto got = Run<PromoteInitializersToLet>(src);
EXPECT_EQ(expect, str(got));
}
TEST_F(PromoteInitializersToLetTest, AssignAbstractArray_ToPhony) {
// Test that we do not try to hoist an abstract array expression that is the RHS of a phony
// assignment, as its type will not be materialized.
auto* src = R"(
fn f() {
_ = array(1, 2, 3, 4);
}
)";
EXPECT_FALSE(ShouldRun<PromoteInitializersToLet>(src));
}
} // namespace
} // namespace tint::ast::transform