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// Copyright 2020 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 "gmock/gmock.h"
#include "src/tint/lang/hlsl/writer/ast_printer/helper_test.h"
#include "src/tint/lang/wgsl/ast/stage_attribute.h"
#include "src/tint/lang/wgsl/ast/variable_decl_statement.h"
#include "src/tint/lang/wgsl/ast/workgroup_attribute.h"
using ::testing::HasSubstr;
namespace tint::hlsl::writer {
namespace {
using namespace tint::core::fluent_types; // NOLINT
using namespace tint::core::number_suffixes; // NOLINT
using HlslASTPrinterTest_Function = TestHelper;
TEST_F(HlslASTPrinterTest_Function, Emit_Function) {
Func("my_func", tint::Empty, ty.void_(),
Vector{
Return(),
});
ASTPrinter& gen = Build();
gen.IncrementIndent();
ASSERT_TRUE(gen.Generate()) << gen.Diagnostics();
EXPECT_EQ(gen.Result(), R"( void my_func() {
return;
}
)");
}
TEST_F(HlslASTPrinterTest_Function, Emit_Function_Name_Collision) {
Func("GeometryShader", tint::Empty, ty.void_(),
Vector{
Return(),
});
ASTPrinter& gen = SanitizeAndBuild();
gen.IncrementIndent();
ASSERT_TRUE(gen.Generate()) << gen.Diagnostics();
EXPECT_THAT(gen.Result(), HasSubstr(R"( void tint_symbol() {
return;
})"));
}
TEST_F(HlslASTPrinterTest_Function, Emit_Function_WithParams) {
Func("my_func",
Vector{
Param("a", ty.f32()),
Param("b", ty.i32()),
},
ty.void_(),
Vector{
Return(),
});
ASTPrinter& gen = Build();
gen.IncrementIndent();
ASSERT_TRUE(gen.Generate()) << gen.Diagnostics();
EXPECT_EQ(gen.Result(), R"( void my_func(float a, int b) {
return;
}
)");
}
TEST_F(HlslASTPrinterTest_Function, Emit_Attribute_EntryPoint_NoReturn_Void) {
Func("main", tint::Empty, ty.void_(), tint::Empty /* no explicit return */,
Vector{
Stage(ast::PipelineStage::kFragment),
});
ASTPrinter& gen = Build();
ASSERT_TRUE(gen.Generate()) << gen.Diagnostics();
EXPECT_EQ(gen.Result(), R"(void main() {
return;
}
)");
}
TEST_F(HlslASTPrinterTest_Function, PtrParameter) {
// fn f(foo : ptr<function, f32>) -> f32 {
// return *foo;
// }
Func("f", Vector{Param("foo", ty.ptr<function, f32>())}, ty.f32(),
Vector{Return(Deref("foo"))});
ASTPrinter& gen = SanitizeAndBuild();
ASSERT_TRUE(gen.Generate()) << gen.Diagnostics();
EXPECT_THAT(gen.Result(), HasSubstr(R"(float f(inout float foo) {
return foo;
}
)"));
}
TEST_F(HlslASTPrinterTest_Function, Emit_Attribute_EntryPoint_WithInOutVars) {
// fn frag_main(@location(0) foo : f32) -> @location(1) f32 {
// return foo;
// }
auto* foo_in = Param("foo", ty.f32(), Vector{Location(0_a)});
Func("frag_main", Vector{foo_in}, ty.f32(),
Vector{
Return("foo"),
},
Vector{
Stage(ast::PipelineStage::kFragment),
},
Vector{
Location(1_a),
});
ASTPrinter& gen = SanitizeAndBuild();
ASSERT_TRUE(gen.Generate()) << gen.Diagnostics();
EXPECT_EQ(gen.Result(), R"(struct tint_symbol_1 {
float foo : TEXCOORD0;
};
struct tint_symbol_2 {
float value : SV_Target1;
};
float frag_main_inner(float foo) {
return foo;
}
tint_symbol_2 frag_main(tint_symbol_1 tint_symbol) {
float inner_result = frag_main_inner(tint_symbol.foo);
tint_symbol_2 wrapper_result = (tint_symbol_2)0;
wrapper_result.value = inner_result;
return wrapper_result;
}
)");
}
TEST_F(HlslASTPrinterTest_Function, Emit_Attribute_EntryPoint_WithInOut_Builtins) {
// fn frag_main(@position(0) coord : vec4<f32>) -> @frag_depth f32 {
// return coord.x;
// }
auto* coord_in = Param("coord", ty.vec4<f32>(), Vector{Builtin(core::BuiltinValue::kPosition)});
Func("frag_main", Vector{coord_in}, ty.f32(),
Vector{
Return(MemberAccessor("coord", "x")),
},
Vector{
Stage(ast::PipelineStage::kFragment),
},
Vector{
Builtin(core::BuiltinValue::kFragDepth),
});
ASTPrinter& gen = SanitizeAndBuild();
ASSERT_TRUE(gen.Generate()) << gen.Diagnostics();
EXPECT_EQ(gen.Result(), R"(struct tint_symbol_1 {
float4 coord : SV_Position;
};
struct tint_symbol_2 {
float value : SV_Depth;
};
float frag_main_inner(float4 coord) {
return coord.x;
}
tint_symbol_2 frag_main(tint_symbol_1 tint_symbol) {
float inner_result = frag_main_inner(float4(tint_symbol.coord.xyz, (1.0f / tint_symbol.coord.w)));
tint_symbol_2 wrapper_result = (tint_symbol_2)0;
wrapper_result.value = inner_result;
return wrapper_result;
}
)");
}
TEST_F(HlslASTPrinterTest_Function, Emit_Attribute_EntryPoint_SharedStruct_DifferentStages) {
// struct Interface {
// @builtin(position) pos : vec4<f32>;
// @location(1) col1 : f32;
// @location(2) col2 : f32;
// };
// fn vert_main() -> Interface {
// return Interface(vec4<f32>(), 0.4, 0.6);
// }
// fn frag_main(inputs : Interface) {
// const r = inputs.col1;
// const g = inputs.col2;
// const p = inputs.pos;
// }
auto* interface_struct =
Structure("Interface",
Vector{
Member("pos", ty.vec4<f32>(), Vector{Builtin(core::BuiltinValue::kPosition)}),
Member("col1", ty.f32(), Vector{Location(1_a)}),
Member("col2", ty.f32(), Vector{Location(2_a)}),
});
Func("vert_main", tint::Empty, ty.Of(interface_struct),
Vector{
Return(Call(ty.Of(interface_struct), Call<vec4<f32>>(), 0.5_f, 0.25_f)),
},
Vector{Stage(ast::PipelineStage::kVertex)});
Func("frag_main", Vector{Param("inputs", ty.Of(interface_struct))}, ty.void_(),
Vector{
Decl(Let("r", ty.f32(), MemberAccessor("inputs", "col1"))),
Decl(Let("g", ty.f32(), MemberAccessor("inputs", "col2"))),
Decl(Let("p", ty.vec4<f32>(), MemberAccessor("inputs", "pos"))),
},
Vector{Stage(ast::PipelineStage::kFragment)});
ASTPrinter& gen = SanitizeAndBuild();
ASSERT_TRUE(gen.Generate()) << gen.Diagnostics();
EXPECT_EQ(gen.Result(), R"(struct Interface {
float4 pos;
float col1;
float col2;
};
struct tint_symbol {
float col1 : TEXCOORD1;
float col2 : TEXCOORD2;
float4 pos : SV_Position;
};
Interface vert_main_inner() {
Interface tint_symbol_3 = {(0.0f).xxxx, 0.5f, 0.25f};
return tint_symbol_3;
}
tint_symbol vert_main() {
Interface inner_result = vert_main_inner();
tint_symbol wrapper_result = (tint_symbol)0;
wrapper_result.pos = inner_result.pos;
wrapper_result.col1 = inner_result.col1;
wrapper_result.col2 = inner_result.col2;
return wrapper_result;
}
struct tint_symbol_2 {
float col1 : TEXCOORD1;
float col2 : TEXCOORD2;
float4 pos : SV_Position;
};
void frag_main_inner(Interface inputs) {
float r = inputs.col1;
float g = inputs.col2;
float4 p = inputs.pos;
}
void frag_main(tint_symbol_2 tint_symbol_1) {
Interface tint_symbol_4 = {float4(tint_symbol_1.pos.xyz, (1.0f / tint_symbol_1.pos.w)), tint_symbol_1.col1, tint_symbol_1.col2};
frag_main_inner(tint_symbol_4);
return;
}
)");
}
TEST_F(HlslASTPrinterTest_Function, Emit_Attribute_EntryPoint_SharedStruct_HelperFunction) {
// struct VertexOutput {
// @builtin(position) pos : vec4<f32>;
// };
// fn foo(x : f32) -> VertexOutput {
// return VertexOutput(vec4<f32>(x, x, x, 1.0));
// }
// fn vert_main1() -> VertexOutput {
// return foo(0.5);
// }
// fn vert_main2() -> VertexOutput {
// return foo(0.25);
// }
auto* vertex_output_struct = Structure(
"VertexOutput",
Vector{Member("pos", ty.vec4<f32>(), Vector{Builtin(core::BuiltinValue::kPosition)})});
Func("foo", Vector{Param("x", ty.f32())}, ty.Of(vertex_output_struct),
Vector{
Return(Call(ty.Of(vertex_output_struct), Call<vec4<f32>>("x", "x", "x", 1_f))),
},
tint::Empty);
Func("vert_main1", tint::Empty, ty.Of(vertex_output_struct),
Vector{
Return(Call("foo", Expr(0.5_f))),
},
Vector{Stage(ast::PipelineStage::kVertex)});
Func("vert_main2", tint::Empty, ty.Of(vertex_output_struct),
Vector{
Return(Call("foo", Expr(0.25_f))),
},
Vector{Stage(ast::PipelineStage::kVertex)});
ASTPrinter& gen = SanitizeAndBuild();
ASSERT_TRUE(gen.Generate()) << gen.Diagnostics();
EXPECT_EQ(gen.Result(), R"(struct VertexOutput {
float4 pos;
};
VertexOutput foo(float x) {
VertexOutput tint_symbol_2 = {float4(x, x, x, 1.0f)};
return tint_symbol_2;
}
struct tint_symbol {
float4 pos : SV_Position;
};
VertexOutput vert_main1_inner() {
return foo(0.5f);
}
tint_symbol vert_main1() {
VertexOutput inner_result = vert_main1_inner();
tint_symbol wrapper_result = (tint_symbol)0;
wrapper_result.pos = inner_result.pos;
return wrapper_result;
}
struct tint_symbol_1 {
float4 pos : SV_Position;
};
VertexOutput vert_main2_inner() {
return foo(0.25f);
}
tint_symbol_1 vert_main2() {
VertexOutput inner_result_1 = vert_main2_inner();
tint_symbol_1 wrapper_result_1 = (tint_symbol_1)0;
wrapper_result_1.pos = inner_result_1.pos;
return wrapper_result_1;
}
)");
}
TEST_F(HlslASTPrinterTest_Function, Emit_Attribute_EntryPoint_With_Uniform) {
auto* ubo_ty = Structure("UBO", Vector{Member("coord", ty.vec4<f32>())});
auto* ubo =
GlobalVar("ubo", ty.Of(ubo_ty), core::AddressSpace::kUniform, Binding(0_a), Group(1_a));
Func("sub_func",
Vector{
Param("param", ty.f32()),
},
ty.f32(),
Vector{
Return(MemberAccessor(MemberAccessor(ubo, "coord"), "x")),
});
auto* var = Var("v", ty.f32(), Call("sub_func", 1_f));
Func("frag_main", tint::Empty, ty.void_(),
Vector{
Decl(var),
Return(),
},
Vector{
Stage(ast::PipelineStage::kFragment),
});
ASTPrinter& gen = SanitizeAndBuild();
ASSERT_TRUE(gen.Generate()) << gen.Diagnostics();
EXPECT_EQ(gen.Result(), R"(cbuffer cbuffer_ubo : register(b0, space1) {
uint4 ubo[1];
};
float sub_func(float param) {
return asfloat(ubo[0].x);
}
void frag_main() {
float v = sub_func(1.0f);
return;
}
)");
}
TEST_F(HlslASTPrinterTest_Function, Emit_Attribute_EntryPoint_With_UniformStruct) {
auto* s = Structure("Uniforms", Vector{Member("coord", ty.vec4<f32>())});
GlobalVar("uniforms", ty.Of(s), core::AddressSpace::kUniform, Binding(0_a), Group(1_a));
auto* var = Var("v", ty.f32(), MemberAccessor(MemberAccessor("uniforms", "coord"), "x"));
Func("frag_main", tint::Empty, ty.void_(),
Vector{
Decl(var),
Return(),
},
Vector{
Stage(ast::PipelineStage::kFragment),
});
ASTPrinter& gen = Build();
ASSERT_TRUE(gen.Generate()) << gen.Diagnostics();
EXPECT_EQ(gen.Result(), R"(cbuffer cbuffer_uniforms : register(b0, space1) {
uint4 uniforms[1];
};
void frag_main() {
float v = uniforms.coord.x;
return;
}
)");
}
TEST_F(HlslASTPrinterTest_Function, Emit_Attribute_EntryPoint_With_RW_StorageBuffer_Read) {
auto* s = Structure("Data", Vector{
Member("a", ty.i32()),
Member("b", ty.f32()),
});
GlobalVar("coord", ty.Of(s), core::AddressSpace::kStorage, core::Access::kReadWrite,
Binding(0_a), Group(1_a));
auto* var = Var("v", ty.f32(), MemberAccessor("coord", "b"));
Func("frag_main", tint::Empty, ty.void_(),
Vector{
Decl(var),
Return(),
},
Vector{
Stage(ast::PipelineStage::kFragment),
});
ASTPrinter& gen = SanitizeAndBuild();
ASSERT_TRUE(gen.Generate()) << gen.Diagnostics();
EXPECT_EQ(gen.Result(),
R"(RWByteAddressBuffer coord : register(u0, space1);
void frag_main() {
float v = asfloat(coord.Load(4u));
return;
}
)");
}
TEST_F(HlslASTPrinterTest_Function, Emit_Attribute_EntryPoint_With_RO_StorageBuffer_Read) {
auto* s = Structure("Data", Vector{
Member("a", ty.i32()),
Member("b", ty.f32()),
});
GlobalVar("coord", ty.Of(s), core::AddressSpace::kStorage, core::Access::kRead, Binding(0_a),
Group(1_a));
auto* var = Var("v", ty.f32(), MemberAccessor("coord", "b"));
Func("frag_main", tint::Empty, ty.void_(),
Vector{
Decl(var),
Return(),
},
Vector{
Stage(ast::PipelineStage::kFragment),
});
ASTPrinter& gen = SanitizeAndBuild();
ASSERT_TRUE(gen.Generate()) << gen.Diagnostics();
EXPECT_EQ(gen.Result(),
R"(ByteAddressBuffer coord : register(t0, space1);
void frag_main() {
float v = asfloat(coord.Load(4u));
return;
}
)");
}
TEST_F(HlslASTPrinterTest_Function, Emit_Attribute_EntryPoint_With_WO_StorageBuffer_Store) {
auto* s = Structure("Data", Vector{
Member("a", ty.i32()),
Member("b", ty.f32()),
});
GlobalVar("coord", ty.Of(s), core::AddressSpace::kStorage, core::Access::kReadWrite,
Binding(0_a), Group(1_a));
Func("frag_main", tint::Empty, ty.void_(),
Vector{
Assign(MemberAccessor("coord", "b"), Expr(2_f)),
Return(),
},
Vector{
Stage(ast::PipelineStage::kFragment),
});
ASTPrinter& gen = SanitizeAndBuild();
ASSERT_TRUE(gen.Generate()) << gen.Diagnostics();
EXPECT_EQ(gen.Result(),
R"(RWByteAddressBuffer coord : register(u0, space1);
void frag_main() {
coord.Store(4u, asuint(2.0f));
return;
}
)");
}
TEST_F(HlslASTPrinterTest_Function, Emit_Attribute_EntryPoint_With_StorageBuffer_Store) {
auto* s = Structure("Data", Vector{
Member("a", ty.i32()),
Member("b", ty.f32()),
});
GlobalVar("coord", ty.Of(s), core::AddressSpace::kStorage, core::Access::kReadWrite,
Binding(0_a), Group(1_a));
Func("frag_main", tint::Empty, ty.void_(),
Vector{
Assign(MemberAccessor("coord", "b"), Expr(2_f)),
Return(),
},
Vector{
Stage(ast::PipelineStage::kFragment),
});
ASTPrinter& gen = SanitizeAndBuild();
ASSERT_TRUE(gen.Generate()) << gen.Diagnostics();
EXPECT_EQ(gen.Result(),
R"(RWByteAddressBuffer coord : register(u0, space1);
void frag_main() {
coord.Store(4u, asuint(2.0f));
return;
}
)");
}
TEST_F(HlslASTPrinterTest_Function, Emit_Attribute_Called_By_EntryPoint_With_Uniform) {
auto* s = Structure("S", Vector{Member("x", ty.f32())});
GlobalVar("coord", ty.Of(s), core::AddressSpace::kUniform, Binding(0_a), Group(1_a));
Func("sub_func",
Vector{
Param("param", ty.f32()),
},
ty.f32(),
Vector{
Return(MemberAccessor("coord", "x")),
});
auto* var = Var("v", ty.f32(), Call("sub_func", 1_f));
Func("frag_main", tint::Empty, ty.void_(),
Vector{
Decl(var),
Return(),
},
Vector{
Stage(ast::PipelineStage::kFragment),
});
ASTPrinter& gen = Build();
ASSERT_TRUE(gen.Generate()) << gen.Diagnostics();
EXPECT_EQ(gen.Result(), R"(cbuffer cbuffer_coord : register(b0, space1) {
uint4 coord[1];
};
float sub_func(float param) {
return coord.x;
}
void frag_main() {
float v = sub_func(1.0f);
return;
}
)");
}
TEST_F(HlslASTPrinterTest_Function, Emit_Attribute_Called_By_EntryPoint_With_StorageBuffer) {
auto* s = Structure("S", Vector{Member("x", ty.f32())});
GlobalVar("coord", ty.Of(s), core::AddressSpace::kStorage, core::Access::kReadWrite,
Binding(0_a), Group(1_a));
Func("sub_func",
Vector{
Param("param", ty.f32()),
},
ty.f32(),
Vector{
Return(MemberAccessor("coord", "x")),
});
auto* var = Var("v", ty.f32(), Call("sub_func", 1_f));
Func("frag_main", tint::Empty, ty.void_(),
Vector{
Decl(var),
Return(),
},
Vector{
Stage(ast::PipelineStage::kFragment),
});
ASTPrinter& gen = SanitizeAndBuild();
ASSERT_TRUE(gen.Generate()) << gen.Diagnostics();
EXPECT_EQ(gen.Result(),
R"(RWByteAddressBuffer coord : register(u0, space1);
float sub_func(float param) {
return asfloat(coord.Load(0u));
}
void frag_main() {
float v = sub_func(1.0f);
return;
}
)");
}
TEST_F(HlslASTPrinterTest_Function, Emit_Attribute_EntryPoint_WithNameCollision) {
Func("GeometryShader", tint::Empty, ty.void_(), tint::Empty,
Vector{
Stage(ast::PipelineStage::kFragment),
});
ASTPrinter& gen = SanitizeAndBuild();
ASSERT_TRUE(gen.Generate()) << gen.Diagnostics();
EXPECT_EQ(gen.Result(), R"(void tint_symbol() {
return;
}
)");
}
TEST_F(HlslASTPrinterTest_Function, Emit_Attribute_EntryPoint_Compute) {
Func("main", tint::Empty, ty.void_(),
Vector{
Return(),
},
Vector{Stage(ast::PipelineStage::kCompute), WorkgroupSize(1_i)});
ASTPrinter& gen = Build();
ASSERT_TRUE(gen.Generate()) << gen.Diagnostics();
EXPECT_EQ(gen.Result(), R"([numthreads(1, 1, 1)]
void main() {
return;
}
)");
}
TEST_F(HlslASTPrinterTest_Function, Emit_Attribute_EntryPoint_Compute_WithWorkgroup_Literal) {
Func("main", tint::Empty, ty.void_(), tint::Empty,
Vector{
Stage(ast::PipelineStage::kCompute),
WorkgroupSize(2_i, 4_i, 6_i),
});
ASTPrinter& gen = Build();
ASSERT_TRUE(gen.Generate()) << gen.Diagnostics();
EXPECT_EQ(gen.Result(), R"([numthreads(2, 4, 6)]
void main() {
return;
}
)");
}
TEST_F(HlslASTPrinterTest_Function, Emit_Attribute_EntryPoint_Compute_WithWorkgroup_Const) {
GlobalConst("width", ty.i32(), Call<i32>(2_i));
GlobalConst("height", ty.i32(), Call<i32>(3_i));
GlobalConst("depth", ty.i32(), Call<i32>(4_i));
Func("main", tint::Empty, ty.void_(), tint::Empty,
Vector{
Stage(ast::PipelineStage::kCompute),
WorkgroupSize("width", "height", "depth"),
});
ASTPrinter& gen = Build();
ASSERT_TRUE(gen.Generate()) << gen.Diagnostics();
EXPECT_EQ(gen.Result(), R"([numthreads(2, 3, 4)]
void main() {
return;
}
)");
}
TEST_F(HlslASTPrinterTest_Function,
Emit_Attribute_EntryPoint_Compute_WithWorkgroup_OverridableConst) {
Override("width", ty.i32(), Call<i32>(2_i), Id(7_u));
Override("height", ty.i32(), Call<i32>(3_i), Id(8_u));
Override("depth", ty.i32(), Call<i32>(4_i), Id(9_u));
Func("main", tint::Empty, ty.void_(), tint::Empty,
Vector{
Stage(ast::PipelineStage::kCompute),
WorkgroupSize("width", "height", "depth"),
});
ASTPrinter& gen = Build();
EXPECT_FALSE(gen.Generate()) << gen.Diagnostics();
EXPECT_EQ(
gen.Diagnostics().Str(),
R"(error: override-expressions should have been removed with the SubstituteOverride transform)");
}
TEST_F(HlslASTPrinterTest_Function, Emit_Function_WithArrayParams) {
Func("my_func",
Vector{
Param("a", ty.array<f32, 5>()),
},
ty.void_(),
Vector{
Return(),
});
ASTPrinter& gen = Build();
ASSERT_TRUE(gen.Generate()) << gen.Diagnostics();
EXPECT_EQ(gen.Result(), R"(void my_func(float a[5]) {
return;
}
)");
}
TEST_F(HlslASTPrinterTest_Function, Emit_Function_WithArrayReturn) {
Func("my_func", tint::Empty, ty.array<f32, 5>(),
Vector{
Return(Call<array<f32, 5>>()),
});
ASTPrinter& gen = Build();
ASSERT_TRUE(gen.Generate()) << gen.Diagnostics();
EXPECT_EQ(gen.Result(), R"(typedef float my_func_ret[5];
my_func_ret my_func() {
return (float[5])0;
}
)");
}
TEST_F(HlslASTPrinterTest_Function, Emit_Function_WithDiscardAndVoidReturn) {
Func("my_func", Vector{Param("a", ty.i32())}, ty.void_(),
Vector{
If(Equal("a", 0_i), //
Block(Discard())),
Return(),
});
ASTPrinter& gen = Build();
ASSERT_TRUE(gen.Generate()) << gen.Diagnostics();
EXPECT_EQ(gen.Result(), R"(void my_func(int a) {
if ((a == 0)) {
discard;
}
return;
}
)");
}
TEST_F(HlslASTPrinterTest_Function, Emit_Function_WithDiscardAndNonVoidReturn) {
Func("my_func", Vector{Param("a", ty.i32())}, ty.i32(),
Vector{
If(Equal("a", 0_i), //
Block(Discard())),
Return(42_i),
});
ASTPrinter& gen = Build();
ASSERT_TRUE(gen.Generate()) << gen.Diagnostics();
EXPECT_EQ(gen.Result(), R"(int my_func(int a) {
if (true) {
if ((a == 0)) {
discard;
}
return 42;
}
int unused;
return unused;
}
)");
}
// https://crbug.com/tint/297
TEST_F(HlslASTPrinterTest_Function, Emit_Multiple_EntryPoint_With_Same_ModuleVar) {
// struct Data {
// d : f32;
// };
// @binding(0) @group(0) var<storage> data : Data;
//
// @compute @workgroup_size(1)
// fn a() {
// var v = data.d;
// return;
// }
//
// @compute @workgroup_size(1)
// fn b() {
// var v = data.d;
// return;
// }
auto* s = Structure("Data", Vector{Member("d", ty.f32())});
GlobalVar("data", ty.Of(s), core::AddressSpace::kStorage, core::Access::kReadWrite,
Binding(0_a), Group(0_a));
{
auto* var = Var("v", ty.f32(), MemberAccessor("data", "d"));
Func("a", tint::Empty, ty.void_(),
Vector{
Decl(var),
Return(),
},
Vector{
Stage(ast::PipelineStage::kCompute),
WorkgroupSize(1_i),
});
}
{
auto* var = Var("v", ty.f32(), MemberAccessor("data", "d"));
Func("b", tint::Empty, ty.void_(),
Vector{
Decl(var),
Return(),
},
Vector{
Stage(ast::PipelineStage::kCompute),
WorkgroupSize(1_i),
});
}
ASTPrinter& gen = SanitizeAndBuild();
ASSERT_TRUE(gen.Generate()) << gen.Diagnostics();
EXPECT_EQ(gen.Result(), R"(RWByteAddressBuffer data : register(u0);
[numthreads(1, 1, 1)]
void a() {
float v = asfloat(data.Load(0u));
return;
}
[numthreads(1, 1, 1)]
void b() {
float v = asfloat(data.Load(0u));
return;
}
)");
}
} // namespace
} // namespace tint::hlsl::writer