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// Copyright 2024 The Dawn & Tint Authors
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice, this
// list of conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
// and/or other materials provided with the distribution.
//
// 3. Neither the name of the copyright holder nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
// OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#include "src/tint/lang/wgsl/ast/transform/offset_first_index.h"
#include <memory>
#include <utility>
#include <vector>
#include "src/tint/lang/wgsl/ast/transform/helper_test.h"
namespace tint::ast::transform {
namespace {
using OffsetFirstIndexTest = TransformTest;
TEST_F(OffsetFirstIndexTest, ShouldRunEmptyModule) {
auto* src = R"()";
EXPECT_FALSE(ShouldRun<OffsetFirstIndex>(src));
}
TEST_F(OffsetFirstIndexTest, ShouldRunNoVertexIndexNoInstanceIndex) {
auto* src = R"(
@fragment
fn entry() {
return;
}
)";
DataMap config;
config.Add<OffsetFirstIndex::Config>(std::nullopt, std::nullopt);
EXPECT_FALSE(ShouldRun<OffsetFirstIndex>(src, std::move(config)));
}
TEST_F(OffsetFirstIndexTest, ShouldRunNoVertexIndex) {
auto* src = R"(
@fragment
fn entry() {
return;
}
)";
DataMap config;
config.Add<OffsetFirstIndex::Config>(std::nullopt, 0);
EXPECT_TRUE(ShouldRun<OffsetFirstIndex>(src, std::move(config)));
}
TEST_F(OffsetFirstIndexTest, ShouldRunNoInstanceIndex) {
auto* src = R"(
@fragment
fn entry() {
return;
}
)";
DataMap config;
config.Add<OffsetFirstIndex::Config>(0, std::nullopt);
EXPECT_TRUE(ShouldRun<OffsetFirstIndex>(src, std::move(config)));
}
TEST_F(OffsetFirstIndexTest, ShouldRun) {
auto* src = R"(
@fragment
fn entry() {
return;
}
)";
DataMap config;
config.Add<OffsetFirstIndex::Config>(0, 4);
EXPECT_TRUE(ShouldRun<OffsetFirstIndex>(src, std::move(config)));
}
TEST_F(OffsetFirstIndexTest, ShouldRunVertexStageWithVertexIndex) {
auto* src = R"(
@vertex
fn entry(@builtin(vertex_index) vert_idx : u32) -> @builtin(position) vec4<f32> {
return vec4<f32>();
}
)";
DataMap config;
config.Add<OffsetFirstIndex::Config>(0, 4);
EXPECT_TRUE(ShouldRun<OffsetFirstIndex>(src, std::move(config)));
}
TEST_F(OffsetFirstIndexTest, ShouldRunVertexStageWithInstanceIndex) {
auto* src = R"(
@vertex
fn entry(@builtin(instance_index) inst_idx : u32) -> @builtin(position) vec4<f32> {
return vec4<f32>();
}
)";
DataMap config;
config.Add<OffsetFirstIndex::Config>(0, 4);
EXPECT_TRUE(ShouldRun<OffsetFirstIndex>(src, std::move(config)));
}
TEST_F(OffsetFirstIndexTest, EmptyModule) {
auto* src = "";
auto* expect = "";
auto got = Run<OffsetFirstIndex>(src);
EXPECT_EQ(expect, str(got));
}
TEST_F(OffsetFirstIndexTest, BasicVertexShader) {
auto* src = R"(
@vertex
fn entry() -> @builtin(position) vec4<f32> {
return vec4<f32>();
}
)";
auto* expect = src;
auto got = Run<OffsetFirstIndex>(src);
EXPECT_EQ(expect, str(got));
}
TEST_F(OffsetFirstIndexTest, BasicModuleVertexIndex) {
auto* src = R"(
fn test(vert_idx : u32) -> u32 {
return vert_idx;
}
@vertex
fn entry(@builtin(vertex_index) vert_idx : u32) -> @builtin(position) vec4<f32> {
test(vert_idx);
return vec4<f32>();
}
)";
auto* expect = R"(
enable chromium_experimental_push_constant;
struct PushConstants {
/* @offset(0) */
first_vertex : u32,
}
var<push_constant> push_constants : PushConstants;
fn test(vert_idx : u32) -> u32 {
return vert_idx;
}
@vertex
fn entry(@builtin(vertex_index) vert_idx : u32) -> @builtin(position) vec4<f32> {
test((bitcast<u32>(vert_idx) + push_constants.first_vertex));
return vec4<f32>();
}
)";
DataMap config;
config.Add<OffsetFirstIndex::Config>(0, std::nullopt);
auto got = Run<OffsetFirstIndex>(src, std::move(config));
EXPECT_EQ(expect, str(got));
}
TEST_F(OffsetFirstIndexTest, BasicModuleVertexIndex_OutOfOrder) {
auto* src = R"(
@vertex
fn entry(@builtin(vertex_index) vert_idx : u32) -> @builtin(position) vec4<f32> {
test(vert_idx);
return vec4<f32>();
}
fn test(vert_idx : u32) -> u32 {
return vert_idx;
}
)";
auto* expect = R"(
enable chromium_experimental_push_constant;
struct PushConstants {
/* @offset(0) */
first_vertex : u32,
}
var<push_constant> push_constants : PushConstants;
@vertex
fn entry(@builtin(vertex_index) vert_idx : u32) -> @builtin(position) vec4<f32> {
test((bitcast<u32>(vert_idx) + push_constants.first_vertex));
return vec4<f32>();
}
fn test(vert_idx : u32) -> u32 {
return vert_idx;
}
)";
DataMap config;
config.Add<OffsetFirstIndex::Config>(0, std::nullopt);
auto got = Run<OffsetFirstIndex>(src, std::move(config));
EXPECT_EQ(expect, str(got));
}
TEST_F(OffsetFirstIndexTest, BasicModuleInstanceIndex) {
auto* src = R"(
fn test(inst_idx : u32) -> u32 {
return inst_idx;
}
@vertex
fn entry(@builtin(instance_index) inst_idx : u32) -> @builtin(position) vec4<f32> {
test(inst_idx);
return vec4<f32>();
}
)";
auto* expect = R"(
enable chromium_experimental_push_constant;
struct PushConstants {
@size(4)
padding_0 : u32,
/* @offset(4) */
first_instance : u32,
}
var<push_constant> push_constants : PushConstants;
fn test(inst_idx : u32) -> u32 {
return inst_idx;
}
@vertex
fn entry(@builtin(instance_index) inst_idx : u32) -> @builtin(position) vec4<f32> {
test((bitcast<u32>(inst_idx) + push_constants.first_instance));
return vec4<f32>();
}
)";
DataMap config;
config.Add<OffsetFirstIndex::Config>(std::nullopt, 4);
auto got = Run<OffsetFirstIndex>(src, std::move(config));
EXPECT_EQ(expect, str(got));
}
TEST_F(OffsetFirstIndexTest, BasicModuleInstanceIndex_OutOfOrder) {
auto* src = R"(
@vertex
fn entry(@builtin(instance_index) inst_idx : u32) -> @builtin(position) vec4<f32> {
test(inst_idx);
return vec4<f32>();
}
fn test(inst_idx : u32) -> u32 {
return inst_idx;
}
)";
auto* expect = R"(
enable chromium_experimental_push_constant;
struct PushConstants {
@size(4)
padding_0 : u32,
/* @offset(4) */
first_instance : u32,
}
var<push_constant> push_constants : PushConstants;
@vertex
fn entry(@builtin(instance_index) inst_idx : u32) -> @builtin(position) vec4<f32> {
test((bitcast<u32>(inst_idx) + push_constants.first_instance));
return vec4<f32>();
}
fn test(inst_idx : u32) -> u32 {
return inst_idx;
}
)";
DataMap config;
config.Add<OffsetFirstIndex::Config>(std::nullopt, 4);
auto got = Run<OffsetFirstIndex>(src, std::move(config));
EXPECT_EQ(expect, str(got));
}
TEST_F(OffsetFirstIndexTest, BasicModuleBothIndexes) {
auto* src = R"(
fn test(instance_idx : u32, vert_idx : u32) -> u32 {
return instance_idx + vert_idx;
}
struct Inputs {
@builtin(instance_index) instance_idx : u32,
@builtin(vertex_index) vert_idx : u32,
};
@vertex
fn entry(inputs : Inputs) -> @builtin(position) vec4<f32> {
test(inputs.instance_idx, inputs.vert_idx);
return vec4<f32>();
}
)";
auto* expect = R"(
enable chromium_experimental_push_constant;
struct PushConstants {
/* @offset(0) */
first_vertex : u32,
/* @offset(4) */
first_instance : u32,
}
var<push_constant> push_constants : PushConstants;
fn test(instance_idx : u32, vert_idx : u32) -> u32 {
return (instance_idx + vert_idx);
}
struct Inputs {
@builtin(instance_index)
instance_idx : u32,
@builtin(vertex_index)
vert_idx : u32,
}
@vertex
fn entry(inputs : Inputs) -> @builtin(position) vec4<f32> {
test((bitcast<u32>(inputs.instance_idx) + push_constants.first_instance), (bitcast<u32>(inputs.vert_idx) + push_constants.first_vertex));
return vec4<f32>();
}
)";
DataMap config;
config.Add<OffsetFirstIndex::Config>(0, 4);
auto got = Run<OffsetFirstIndex>(src, std::move(config));
EXPECT_EQ(expect, str(got));
}
TEST_F(OffsetFirstIndexTest, BasicModuleBothIndexes_OutOfOrder) {
auto* src = R"(
@vertex
fn entry(inputs : Inputs) -> @builtin(position) vec4<f32> {
test(inputs.instance_idx, inputs.vert_idx);
return vec4<f32>();
}
struct Inputs {
@builtin(instance_index) instance_idx : u32,
@builtin(vertex_index) vert_idx : u32,
};
fn test(instance_idx : u32, vert_idx : u32) -> u32 {
return instance_idx + vert_idx;
}
)";
auto* expect = R"(
enable chromium_experimental_push_constant;
struct PushConstants {
/* @offset(0) */
first_vertex : u32,
/* @offset(4) */
first_instance : u32,
}
var<push_constant> push_constants : PushConstants;
@vertex
fn entry(inputs : Inputs) -> @builtin(position) vec4<f32> {
test((bitcast<u32>(inputs.instance_idx) + push_constants.first_instance), (bitcast<u32>(inputs.vert_idx) + push_constants.first_vertex));
return vec4<f32>();
}
struct Inputs {
@builtin(instance_index)
instance_idx : u32,
@builtin(vertex_index)
vert_idx : u32,
}
fn test(instance_idx : u32, vert_idx : u32) -> u32 {
return (instance_idx + vert_idx);
}
)";
DataMap config;
config.Add<OffsetFirstIndex::Config>(0, 4);
auto got = Run<OffsetFirstIndex>(src, std::move(config));
EXPECT_EQ(expect, str(got));
}
TEST_F(OffsetFirstIndexTest, BasicModuleBothIndexes_OffsetsOutOfOrder) {
auto* src = R"(
@vertex
fn entry(inputs : Inputs) -> @builtin(position) vec4<f32> {
test(inputs.instance_idx, inputs.vert_idx);
return vec4<f32>();
}
struct Inputs {
@builtin(vertex_index) vert_idx : u32,
@builtin(instance_index) instance_idx : u32,
};
fn test(instance_idx : u32, vert_idx : u32) -> u32 {
return instance_idx + vert_idx;
}
)";
auto* expect = R"(
enable chromium_experimental_push_constant;
struct PushConstants {
/* @offset(0) */
first_instance : u32,
/* @offset(4) */
first_vertex : u32,
}
var<push_constant> push_constants : PushConstants;
@vertex
fn entry(inputs : Inputs) -> @builtin(position) vec4<f32> {
test((bitcast<u32>(inputs.instance_idx) + push_constants.first_instance), (bitcast<u32>(inputs.vert_idx) + push_constants.first_vertex));
return vec4<f32>();
}
struct Inputs {
@builtin(vertex_index)
vert_idx : u32,
@builtin(instance_index)
instance_idx : u32,
}
fn test(instance_idx : u32, vert_idx : u32) -> u32 {
return (instance_idx + vert_idx);
}
)";
DataMap config;
config.Add<OffsetFirstIndex::Config>(4, 0);
auto got = Run<OffsetFirstIndex>(src, std::move(config));
EXPECT_EQ(expect, str(got));
}
TEST_F(OffsetFirstIndexTest, BasicModuleBothIndexesVertexDisabled) {
auto* src = R"(
fn test(instance_idx : u32, vert_idx : u32) -> u32 {
return instance_idx + vert_idx;
}
struct Inputs {
@builtin(instance_index) instance_idx : u32,
@builtin(vertex_index) vert_idx : u32,
};
@vertex
fn entry(inputs : Inputs) -> @builtin(position) vec4<f32> {
test(inputs.instance_idx, inputs.vert_idx);
return vec4<f32>();
}
)";
auto* expect = R"(
enable chromium_experimental_push_constant;
struct PushConstants {
/* @offset(0) */
first_instance : u32,
}
var<push_constant> push_constants : PushConstants;
fn test(instance_idx : u32, vert_idx : u32) -> u32 {
return (instance_idx + vert_idx);
}
struct Inputs {
@builtin(instance_index)
instance_idx : u32,
@builtin(vertex_index)
vert_idx : u32,
}
@vertex
fn entry(inputs : Inputs) -> @builtin(position) vec4<f32> {
test((bitcast<u32>(inputs.instance_idx) + push_constants.first_instance), inputs.vert_idx);
return vec4<f32>();
}
)";
DataMap config;
config.Add<OffsetFirstIndex::Config>(std::nullopt, 0);
auto got = Run<OffsetFirstIndex>(src, std::move(config));
EXPECT_EQ(expect, str(got));
}
TEST_F(OffsetFirstIndexTest, BasicModuleBothIndexesInstanceDisabled) {
auto* src = R"(
fn test(instance_idx : u32, vert_idx : u32) -> u32 {
return instance_idx + vert_idx;
}
struct Inputs {
@builtin(instance_index) instance_idx : u32,
@builtin(vertex_index) vert_idx : u32,
};
@vertex
fn entry(inputs : Inputs) -> @builtin(position) vec4<f32> {
test(inputs.instance_idx, inputs.vert_idx);
return vec4<f32>();
}
)";
auto* expect = R"(
enable chromium_experimental_push_constant;
struct PushConstants {
/* @offset(0) */
first_vertex : u32,
}
var<push_constant> push_constants : PushConstants;
fn test(instance_idx : u32, vert_idx : u32) -> u32 {
return (instance_idx + vert_idx);
}
struct Inputs {
@builtin(instance_index)
instance_idx : u32,
@builtin(vertex_index)
vert_idx : u32,
}
@vertex
fn entry(inputs : Inputs) -> @builtin(position) vec4<f32> {
test(inputs.instance_idx, (bitcast<u32>(inputs.vert_idx) + push_constants.first_vertex));
return vec4<f32>();
}
)";
DataMap config;
config.Add<OffsetFirstIndex::Config>(0, std::nullopt);
auto got = Run<OffsetFirstIndex>(src, std::move(config));
EXPECT_EQ(expect, str(got));
}
TEST_F(OffsetFirstIndexTest, BasicModuleBothIndexesBothDisabled) {
auto* src = R"(
fn test(instance_idx : u32, vert_idx : u32) -> u32 {
return (instance_idx + vert_idx);
}
struct Inputs {
@builtin(instance_index)
instance_idx : u32,
@builtin(vertex_index)
vert_idx : u32,
}
@vertex
fn entry(inputs : Inputs) -> @builtin(position) vec4<f32> {
test(inputs.instance_idx, inputs.vert_idx);
return vec4<f32>();
}
)";
auto* expect = src;
DataMap config;
config.Add<OffsetFirstIndex::Config>(std::nullopt, std::nullopt);
auto got = Run<OffsetFirstIndex>(src, std::move(config));
EXPECT_EQ(expect, str(got));
}
// Test a shader with a user-declared struct called PushConstants, to force
// renaming of the Tint-provided PushConstants struct.
TEST_F(OffsetFirstIndexTest, ForceRenamingPushConstantsStruct) {
auto* src = R"(
struct PushConstants {
f : f32,
}
@group(0) @binding(0) var<uniform> p : PushConstants;
@vertex
fn entry(@builtin(vertex_index) vert_idx : u32) -> @builtin(position) vec4<f32> {
return vec4<f32>(f32(vert_idx) + p.f);
}
)";
auto* expect = R"(
enable chromium_experimental_push_constant;
struct PushConstants_1 {
/* @offset(0) */
first_vertex : u32,
}
var<push_constant> push_constants : PushConstants_1;
struct PushConstants {
f : f32,
}
@group(0) @binding(0) var<uniform> p : PushConstants;
@vertex
fn entry(@builtin(vertex_index) vert_idx : u32) -> @builtin(position) vec4<f32> {
return vec4<f32>((f32((bitcast<u32>(vert_idx) + push_constants.first_vertex)) + p.f));
}
)";
DataMap config;
config.Add<OffsetFirstIndex::Config>(0, std::nullopt);
auto got = Run<OffsetFirstIndex>(src, std::move(config));
EXPECT_EQ(expect, str(got));
}
// Test a shader with a user-declared variable called push_constants, to force
// renaming of the Tint-provided push_constants variable.
TEST_F(OffsetFirstIndexTest, ForceRenamingPushConstantsVar) {
auto* src = R"(
@group(0) @binding(0) var<uniform> push_constants : u32;
@vertex
fn entry(@builtin(vertex_index) vert_idx : u32) -> @builtin(position) vec4<f32> {
return vec4<f32>(f32(vert_idx));
}
)";
auto* expect = R"(
enable chromium_experimental_push_constant;
struct PushConstants {
/* @offset(0) */
first_vertex : u32,
}
var<push_constant> push_constants_1 : PushConstants;
@group(0) @binding(0) var<uniform> push_constants : u32;
@vertex
fn entry(@builtin(vertex_index) vert_idx : u32) -> @builtin(position) vec4<f32> {
return vec4<f32>(f32((bitcast<u32>(vert_idx) + push_constants_1.first_vertex)));
}
)";
DataMap config;
config.Add<OffsetFirstIndex::Config>(0, std::nullopt);
auto got = Run<OffsetFirstIndex>(src, std::move(config));
EXPECT_EQ(expect, str(got));
}
TEST_F(OffsetFirstIndexTest, NestedCalls) {
auto* src = R"(
fn func1(vert_idx : u32) -> u32 {
return vert_idx;
}
fn func2(vert_idx : u32) -> u32 {
return func1(vert_idx);
}
@vertex
fn entry(@builtin(vertex_index) vert_idx : u32) -> @builtin(position) vec4<f32> {
func2(vert_idx);
return vec4<f32>();
}
)";
auto* expect = R"(
enable chromium_experimental_push_constant;
struct PushConstants {
/* @offset(0) */
first_vertex : u32,
}
var<push_constant> push_constants : PushConstants;
fn func1(vert_idx : u32) -> u32 {
return vert_idx;
}
fn func2(vert_idx : u32) -> u32 {
return func1(vert_idx);
}
@vertex
fn entry(@builtin(vertex_index) vert_idx : u32) -> @builtin(position) vec4<f32> {
func2((bitcast<u32>(vert_idx) + push_constants.first_vertex));
return vec4<f32>();
}
)";
DataMap config;
config.Add<OffsetFirstIndex::Config>(0, std::nullopt);
auto got = Run<OffsetFirstIndex>(src, std::move(config));
EXPECT_EQ(expect, str(got));
}
TEST_F(OffsetFirstIndexTest, NestedCalls_OutOfOrder) {
auto* src = R"(
@vertex
fn entry(@builtin(vertex_index) vert_idx : u32) -> @builtin(position) vec4<f32> {
func2(vert_idx);
return vec4<f32>();
}
fn func2(vert_idx : u32) -> u32 {
return func1(vert_idx);
}
fn func1(vert_idx : u32) -> u32 {
return vert_idx;
}
)";
auto* expect = R"(
enable chromium_experimental_push_constant;
struct PushConstants {
/* @offset(0) */
first_vertex : u32,
}
var<push_constant> push_constants : PushConstants;
@vertex
fn entry(@builtin(vertex_index) vert_idx : u32) -> @builtin(position) vec4<f32> {
func2((bitcast<u32>(vert_idx) + push_constants.first_vertex));
return vec4<f32>();
}
fn func2(vert_idx : u32) -> u32 {
return func1(vert_idx);
}
fn func1(vert_idx : u32) -> u32 {
return vert_idx;
}
)";
DataMap config;
config.Add<OffsetFirstIndex::Config>(0, std::nullopt);
auto got = Run<OffsetFirstIndex>(src, std::move(config));
EXPECT_EQ(expect, str(got));
}
TEST_F(OffsetFirstIndexTest, MultipleEntryPoints) {
auto* src = R"(
fn func(i : u32) -> u32 {
return i;
}
@vertex
fn entry_a(@builtin(vertex_index) vert_idx : u32) -> @builtin(position) vec4<f32> {
func(vert_idx);
return vec4<f32>();
}
@vertex
fn entry_b(@builtin(vertex_index) vert_idx : u32, @builtin(instance_index) inst_idx : u32) -> @builtin(position) vec4<f32> {
func(vert_idx + inst_idx);
return vec4<f32>();
}
@vertex
fn entry_c(@builtin(instance_index) inst_idx : u32) -> @builtin(position) vec4<f32> {
func(inst_idx);
return vec4<f32>();
}
)";
auto* expect = R"(
enable chromium_experimental_push_constant;
struct PushConstants {
/* @offset(0) */
first_vertex : u32,
/* @offset(4) */
first_instance : u32,
}
var<push_constant> push_constants : PushConstants;
fn func(i : u32) -> u32 {
return i;
}
@vertex
fn entry_a(@builtin(vertex_index) vert_idx : u32) -> @builtin(position) vec4<f32> {
func((bitcast<u32>(vert_idx) + push_constants.first_vertex));
return vec4<f32>();
}
@vertex
fn entry_b(@builtin(vertex_index) vert_idx : u32, @builtin(instance_index) inst_idx : u32) -> @builtin(position) vec4<f32> {
func(((bitcast<u32>(vert_idx) + push_constants.first_vertex) + (bitcast<u32>(inst_idx) + push_constants.first_instance)));
return vec4<f32>();
}
@vertex
fn entry_c(@builtin(instance_index) inst_idx : u32) -> @builtin(position) vec4<f32> {
func((bitcast<u32>(inst_idx) + push_constants.first_instance));
return vec4<f32>();
}
)";
DataMap config;
config.Add<OffsetFirstIndex::Config>(0, 4);
auto got = Run<OffsetFirstIndex>(src, std::move(config));
EXPECT_EQ(expect, str(got));
}
TEST_F(OffsetFirstIndexTest, MultipleEntryPoints_OutOfOrder) {
auto* src = R"(
@vertex
fn entry_a(@builtin(vertex_index) vert_idx : u32) -> @builtin(position) vec4<f32> {
func(vert_idx);
return vec4<f32>();
}
@vertex
fn entry_b(@builtin(vertex_index) vert_idx : u32, @builtin(instance_index) inst_idx : u32) -> @builtin(position) vec4<f32> {
func(vert_idx + inst_idx);
return vec4<f32>();
}
@vertex
fn entry_c(@builtin(instance_index) inst_idx : u32) -> @builtin(position) vec4<f32> {
func(inst_idx);
return vec4<f32>();
}
fn func(i : u32) -> u32 {
return i;
}
)";
auto* expect = R"(
enable chromium_experimental_push_constant;
struct PushConstants {
/* @offset(0) */
first_vertex : u32,
/* @offset(4) */
first_instance : u32,
}
var<push_constant> push_constants : PushConstants;
@vertex
fn entry_a(@builtin(vertex_index) vert_idx : u32) -> @builtin(position) vec4<f32> {
func((bitcast<u32>(vert_idx) + push_constants.first_vertex));
return vec4<f32>();
}
@vertex
fn entry_b(@builtin(vertex_index) vert_idx : u32, @builtin(instance_index) inst_idx : u32) -> @builtin(position) vec4<f32> {
func(((bitcast<u32>(vert_idx) + push_constants.first_vertex) + (bitcast<u32>(inst_idx) + push_constants.first_instance)));
return vec4<f32>();
}
@vertex
fn entry_c(@builtin(instance_index) inst_idx : u32) -> @builtin(position) vec4<f32> {
func((bitcast<u32>(inst_idx) + push_constants.first_instance));
return vec4<f32>();
}
fn func(i : u32) -> u32 {
return i;
}
)";
DataMap config;
config.Add<OffsetFirstIndex::Config>(0, 4);
auto got = Run<OffsetFirstIndex>(src, std::move(config));
EXPECT_EQ(expect, str(got));
}
} // namespace
} // namespace tint::ast::transform