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spirv-reader: fix arity for depth texture builtins 

Texture buitins on depth textures always result in scalar f32.
Corresponding operations in SPIR-V always result in vec4<f32>.

When translating to Tint AST, wrap the generated texture builtin
in a type constructor to vec4, with the builtin result as the
x component.

Fixed: tint:411
Change-Id: Idf26a1cbc7e875bc8a97bf3c0b342c0220c6d4b7
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/35900
Auto-Submit: David Neto <dneto@google.com>
Commit-Queue: Ryan Harrison <rharrison@chromium.org>
Reviewed-by: Ryan Harrison <rharrison@chromium.org>
This commit is contained in:
David Neto 2020-12-17 16:29:31 +00:00 committed by Commit Bot service account
parent a57f842be9
commit d1469c60c1
2 changed files with 136 additions and 77 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

23
src/reader/spirv/function.cc
View File

@ -4145,14 +4145,31 @@ bool FunctionEmitter::EmitImageAccess(const spvtools::opt::Instruction& inst) {
// It returns a value.
ast::Expression* value = call_expr;
// If necessary, convert the result to the signedness of the instruction
// result type. Compare the SPIR-V image's sampled component type with the
// component of the result type of the SPIR-V instruction.
// The result type, derived from the SPIR-V instruction.
auto* result_type = parser_impl_.ConvertType(inst.type_id());
auto* result_component_type = result_type;
if (auto* result_vector_type = result_type->As<ast::type::Vector>()) {
result_component_type = result_vector_type->type();
}
// Convert the arity of the result when operating on depth textures.
// SPIR-V operations on depth textures always result in 4-element vectors.
// But WGSL operations on depth textures always result in a f32 scalar.
// Construct a 4-element vector with the result from the builtin in the
// first component.
if (texture_type->Is<ast::type::DepthTexture>()) {
value = create<ast::TypeConstructorExpression>(
Source{},
result_type, // a vec4
ast::ExpressionList{
value, parser_impl_.MakeNullValue(result_component_type),
parser_impl_.MakeNullValue(result_component_type),
parser_impl_.MakeNullValue(result_component_type)});
}
// If necessary, convert the result to the signedness of the instruction
// result type. Compare the SPIR-V image's sampled component type with the
// component of the result type of the SPIR-V instruction.
auto* spirv_image_type =
parser_impl_.GetSpirvTypeForHandleMemoryObjectDeclaration(*image);
if (!spirv_image_type || (spirv_image_type->opcode() != SpvOpTypeImage)) {

42
src/reader/spirv/parser_impl_handle_test.cc
View File

@ -1751,6 +1751,8 @@ INSTANTIATE_TEST_SUITE_P(
none
__vec_4__f32
{
TypeConstructor[not set]{
__vec_4__f32
Call[not set]{
Identifier[not set]{textureSample}
(
@ -1759,6 +1761,10 @@ INSTANTIATE_TEST_SUITE_P(
Identifier[not set]{coords12}
)
}
ScalarConstructor[not set]{0.000000}
ScalarConstructor[not set]{0.000000}
ScalarConstructor[not set]{0.000000}
}
}
}
}
@ -1768,6 +1774,8 @@ INSTANTIATE_TEST_SUITE_P(
none
__vec_4__f32
{
TypeConstructor[not set]{
__vec_4__f32
Call[not set]{
Identifier[not set]{textureSampleCompare}
(
@ -1777,6 +1785,10 @@ INSTANTIATE_TEST_SUITE_P(
ScalarConstructor[not set]{0.200000}
)
}
ScalarConstructor[not set]{0.000000}
ScalarConstructor[not set]{0.000000}
ScalarConstructor[not set]{0.000000}
}
}
}
})"}));
@ -1809,6 +1821,8 @@ INSTANTIATE_TEST_SUITE_P(
__depth_texture_2d
})",
R"(
TypeConstructor[not set]{
__vec_4__f32
Call[not set]{
Identifier[not set]{textureSampleCompare}
(
@ -1817,6 +1831,10 @@ INSTANTIATE_TEST_SUITE_P(
Identifier[not set]{coords12}
ScalarConstructor[not set]{0.200000}
)
}
ScalarConstructor[not set]{0.000000}
ScalarConstructor[not set]{0.000000}
ScalarConstructor[not set]{0.000000}
})"},
// ImageSampleDrefImplicitLod - arrayed
ImageAccessCase{"%float 2D 0 1 0 1 Unknown",
@ -1842,6 +1860,8 @@ INSTANTIATE_TEST_SUITE_P(
__depth_texture_2d_array
})",
R"(
TypeConstructor[not set]{
__vec_4__f32
Call[not set]{
Identifier[not set]{textureSampleCompare}
(
@ -1860,6 +1880,10 @@ INSTANTIATE_TEST_SUITE_P(
}
ScalarConstructor[not set]{0.200000}
)
}
ScalarConstructor[not set]{0.000000}
ScalarConstructor[not set]{0.000000}
ScalarConstructor[not set]{0.000000}
})"},
// ImageSampleDrefImplicitLod with ConstOffset
ImageAccessCase{
@ -1886,6 +1910,8 @@ INSTANTIATE_TEST_SUITE_P(
__depth_texture_2d
})",
R"(
TypeConstructor[not set]{
__vec_4__f32
Call[not set]{
Identifier[not set]{textureSampleCompare}
(
@ -1895,6 +1921,10 @@ INSTANTIATE_TEST_SUITE_P(
ScalarConstructor[not set]{0.200000}
Identifier[not set]{offsets2d}
)
}
ScalarConstructor[not set]{0.000000}
ScalarConstructor[not set]{0.000000}
ScalarConstructor[not set]{0.000000}
})"},
// ImageSampleDrefImplicitLod arrayed with ConstOffset
ImageAccessCase{
@ -1921,6 +1951,8 @@ INSTANTIATE_TEST_SUITE_P(
__depth_texture_2d_array
})",
R"(
TypeConstructor[not set]{
__vec_4__f32
Call[not set]{
Identifier[not set]{textureSampleCompare}
(
@ -1940,6 +1972,10 @@ INSTANTIATE_TEST_SUITE_P(
ScalarConstructor[not set]{0.200000}
Identifier[not set]{offsets2d}
)
}
ScalarConstructor[not set]{0.000000}
ScalarConstructor[not set]{0.000000}
ScalarConstructor[not set]{0.000000}
})"}));
INSTANTIATE_TEST_SUITE_P(
@ -2471,6 +2507,8 @@ INSTANTIATE_TEST_SUITE_P(
__depth_texture_2d
})",
R"(
TypeConstructor[not set]{
__vec_4__f32
Call[not set]{
Identifier[not set]{textureSampleLevel}
(
@ -2482,6 +2520,10 @@ INSTANTIATE_TEST_SUITE_P(
Identifier[not set]{f1}
}
)
}
ScalarConstructor[not set]{0.000000}
ScalarConstructor[not set]{0.000000}
ScalarConstructor[not set]{0.000000}
})"}}));
using SpvParserTest_ImageAccessTest =