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2026-05-06 23:44:13 +02:00
parent a5f787d80f
commit fd7038b853
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+#!amber
+
+# Copyright 2022 Google LLC
+#
+# 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.
+
+
+# A test for a coverage-gap found by the GraphicsFuzz project.
+
+# Short description: A fragment shader that covers specific LLVM code paths
+
+# The test passes because the shader always writes red.
+
+SHADER vertex variant_vertex_shader PASSTHROUGH
+
+# variant_fragment_shader is derived from the following GLSL:
+# #version 320 es
+# #define _float_0_0 _GLF_uniform_float_values[0]
+#
+# precision highp float;
+# precision highp int;
+#
+# // Contents of _GLF_uniform_float_values: 0.0
+# layout(set = 0, binding = 0) uniform buf0
+# {
+#     float _GLF_uniform_float_values[1];
+# };
+#
+# layout(location = 0) out vec4 _GLF_color;
+#
+# void main()
+# {
+#     float f;
+#
+#     // f is uninitialized, but 1.0 is selected from the first vector.
+#     _GLF_color = mix(vec4(1.0), vec4(f, 0.0, 0.0, 1.0), bvec4(gl_FragCoord.y < _float_0_0, true, true, true));
+# }
+SHADER fragment variant_fragment_shader SPIRV-ASM TARGET_ENV spv1.0
+; SPIR-V
+; Version: 1.0
+; Generator: Khronos Glslang Reference Front End; 10
+; Bound: 39
+; Schema: 0
+               OpCapability Shader
+          %1 = OpExtInstImport "GLSL.std.450"
+               OpMemoryModel Logical GLSL450
+               OpEntryPoint Fragment %4 "main" %9 %18
+               OpExecutionMode %4 OriginUpperLeft
+               OpSource ESSL 320
+               OpName %4 "main"
+               OpName %9 "_GLF_color"
+               OpName %13 "f"
+               OpName %18 "gl_FragCoord"
+               OpName %25 "buf0"
+               OpMemberName %25 0 "_GLF_uniform_float_values"
+               OpName %27 ""
+               OpDecorate %9 Location 0
+               OpDecorate %18 BuiltIn FragCoord
+               OpDecorate %24 ArrayStride 16
+               OpMemberDecorate %25 0 Offset 0
+               OpDecorate %25 Block
+               OpDecorate %27 DescriptorSet 0
+               OpDecorate %27 Binding 0
+          %2 = OpTypeVoid
+          %3 = OpTypeFunction %2
+          %6 = OpTypeFloat 32
+          %7 = OpTypeVector %6 4
+          %8 = OpTypePointer Output %7
+          %9 = OpVariable %8 Output
+         %10 = OpConstant %6 1
+         %11 = OpConstantComposite %7 %10 %10 %10 %10
+         %12 = OpTypePointer Function %6
+         %15 = OpConstant %6 0
+         %17 = OpTypePointer Input %7
+         %18 = OpVariable %17 Input
+         %19 = OpTypeInt 32 0
+         %20 = OpConstant %19 1
+         %21 = OpTypePointer Input %6
+         %24 = OpTypeArray %6 %20
+         %25 = OpTypeStruct %24
+         %26 = OpTypePointer Uniform %25
+         %27 = OpVariable %26 Uniform
+         %28 = OpTypeInt 32 1
+         %29 = OpConstant %28 0
+         %30 = OpTypePointer Uniform %6
+         %33 = OpTypeBool
+         %35 = OpConstantTrue %33
+         %36 = OpTypeVector %33 4
+          %4 = OpFunction %2 None %3
+          %5 = OpLabel
+         %13 = OpVariable %12 Function
+         %14 = OpLoad %6 %13
+         %16 = OpCompositeConstruct %7 %14 %15 %15 %10
+         %22 = OpAccessChain %21 %18 %20
+         %23 = OpLoad %6 %22
+         %31 = OpAccessChain %30 %27 %29 %29
+         %32 = OpLoad %6 %31
+         %34 = OpFOrdLessThan %33 %23 %32
+         %37 = OpCompositeConstruct %36 %34 %35 %35 %35
+         %38 = OpSelect %7 %37 %16 %11
+               OpStore %9 %38
+               OpReturn
+               OpFunctionEnd
+END
+
+# uniforms for variant
+
+# _GLF_uniform_float_values
+BUFFER variant__GLF_uniform_float_values DATA_TYPE float[] STD140 DATA
+ 0.0
+END
+
+BUFFER variant_framebuffer FORMAT B8G8R8A8_UNORM
+
+PIPELINE graphics variant_pipeline
+  ATTACH variant_vertex_shader
+  ATTACH variant_fragment_shader
+  FRAMEBUFFER_SIZE 32 32
+  BIND BUFFER variant_framebuffer AS color LOCATION 0
+  BIND BUFFER variant__GLF_uniform_float_values AS uniform DESCRIPTOR_SET 0 BINDING 0
+END
+CLEAR_COLOR variant_pipeline 0 0 0 255
+
+CLEAR variant_pipeline
+RUN variant_pipeline DRAW_RECT POS 0 0 SIZE 32 32
+
+EXPECT variant_framebuffer IDX 0 0 SIZE 32 32 EQ_RGBA 255 0 0 255