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tint: Fix emitting vector constant in HLSL writer 

This patch fix the issue that HLSL generator emit wrong constant
element index for vectors with all elements being the same, which may
cause error when emitting a matrix constant with sub columns having
identical elements.
Corresponding unit test is implemented.

Bug: tint:1588
Change-Id: Ia40b3f1a676d84aadaa5ce900677547fb15abe7f
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/94041
Commit-Queue: Zhaoming Jiang <zhaoming.jiang@intel.com>
Kokoro: Kokoro <noreply+kokoro@google.com>
Reviewed-by: Ben Clayton <bclayton@google.com>
This commit is contained in:
Zhaoming Jiang 2022-06-17 12:48:46 +00:00 committed by Dawn LUCI CQ
parent 65d61d76a3
commit be6fb2a8d2
2 changed files with 32 additions and 5 deletions
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10
src/tint/writer/hlsl/generator_impl.cc
View File

@ -3162,11 +3162,11 @@ bool GeneratorImpl::EmitConstant(std::ostream& out, const sem::Constant& constan
{
ScopedParen sp(out);
bool ok = Switch(
vec_ty->type(), //
[&](const sem::Bool*) { return emit_bool(0); }, //
[&](const sem::F32*) { return emit_f32(0); }, //
[&](const sem::I32*) { return emit_i32(0); }, //
[&](const sem::U32*) { return emit_u32(0); } //
vec_ty->type(), //
[&](const sem::Bool*) { return emit_bool(start); }, //
[&](const sem::F32*) { return emit_f32(start); }, //
[&](const sem::I32*) { return emit_i32(start); }, //
[&](const sem::U32*) { return emit_u32(start); } //
);
if (!ok) {
return false;

27
src/tint/writer/hlsl/generator_impl_constructor_test.cc
View File

@ -186,6 +186,33 @@ TEST_F(HlslGeneratorImplTest_Constructor, EmitConstructor_Type_Mat) {
HasSubstr("float2x3(float3(1.0f, 2.0f, 3.0f), float3(3.0f, 4.0f, 5.0f))"));
}
TEST_F(HlslGeneratorImplTest_Constructor, EmitConstructor_Type_Mat_Complex) {
// mat4x4<f32>(
// vec4<f32>(2.0f, 3.0f, 4.0f, 8.0f),
// vec4<f32>(),
// vec4<f32>(7.0f),
// vec4<f32>(vec4<f32>(42.0f, 21.0f, 6.0f, -5.0f)),
// );
auto* vector_literal =
vec4<f32>(Expr(f32(2.0)), Expr(f32(3.0)), Expr(f32(4.0)), Expr(f32(8.0)));
auto* vector_zero_ctor = vec4<f32>();
auto* vector_single_scalar_ctor = vec4<f32>(Expr(f32(7.0)));
auto* vector_identical_ctor =
vec4<f32>(vec4<f32>(Expr(f32(42.0)), Expr(f32(21.0)), Expr(f32(6.0)), Expr(f32(-5.0))));
auto* constructor = mat4x4<f32>(vector_literal, vector_zero_ctor, vector_single_scalar_ctor,
vector_identical_ctor);
WrapInFunction(constructor);
GeneratorImpl& gen = Build();
ASSERT_TRUE(gen.Generate()) << gen.error();
EXPECT_THAT(gen.result(), HasSubstr("float4x4(float4(2.0f, 3.0f, 4.0f, 8.0f), (0.0f).xxxx, "
"(7.0f).xxxx, float4(42.0f, 21.0f, 6.0f, -5.0f))"));
}
TEST_F(HlslGeneratorImplTest_Constructor, EmitConstructor_Type_Mat_Empty) {
WrapInFunction(mat2x3<f32>());