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2026-05-06 23:44:13 +02:00
parent a5f787d80f
commit fd7038b853
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+#!amber
+
+# Copyright 2020 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 GraphicsFuzz.
+
+# Short description: A fragment shader that covers a specific inlining optimization path.
+
+# The test passes because shader always writes red.
+
+SHADER vertex variant_vertex_shader PASSTHROUGH
+
+# variant_fragment_shader is derived from the following GLSL:
+# #version 310 es
+# precision highp float;
+#
+# layout(location = 0) out vec4 _GLF_color;
+#
+# float func()
+# {
+#     float x = 2.0;
+#     if (gl_FragCoord.x == 12.0)
+#     {
+#         if (gl_FragCoord.y == 13.0)
+#         {
+#             x += 1.0;
+#         }
+#         return x;
+#     }
+#
+#     return 1.0;
+# }
+#
+# void main()
+# {
+#     if (false)
+#     {
+#         _GLF_color = vec4(func());
+#     }
+#     else
+#     {
+#         _GLF_color = vec4(1, 0, 0, 1);
+#     }
+# }
+SHADER fragment variant_fragment_shader SPIRV-ASM TARGET_ENV spv1.0
+; SPIR-V
+; Version: 1.0
+; Generator: Khronos Glslang Reference Front End; 8
+; Bound: 50
+; Schema: 0
+               OpCapability Shader
+          %1 = OpExtInstImport "GLSL.std.450"
+               OpMemoryModel Logical GLSL450
+               OpEntryPoint Fragment %4 "main" %15 %44
+               OpExecutionMode %4 OriginUpperLeft
+               OpSource ESSL 310
+               OpName %4 "main"
+               OpName %8 "func("
+               OpName %11 "x"
+               OpName %15 "gl_FragCoord"
+               OpName %44 "_GLF_color"
+               OpDecorate %15 BuiltIn FragCoord
+               OpDecorate %44 Location 0
+          %2 = OpTypeVoid
+          %3 = OpTypeFunction %2
+          %6 = OpTypeFloat 32
+          %7 = OpTypeFunction %6
+         %10 = OpTypePointer Function %6
+         %12 = OpConstant %6 2
+         %13 = OpTypeVector %6 4
+         %14 = OpTypePointer Input %13
+         %15 = OpVariable %14 Input
+         %16 = OpTypeInt 32 0
+         %17 = OpConstant %16 0
+         %18 = OpTypePointer Input %6
+         %21 = OpConstant %6 12
+         %22 = OpTypeBool
+         %26 = OpConstant %16 1
+         %29 = OpConstant %6 13
+         %33 = OpConstant %6 1
+         %40 = OpConstantFalse %22
+         %43 = OpTypePointer Output %13
+         %44 = OpVariable %43 Output
+         %48 = OpConstant %6 0
+         %49 = OpConstantComposite %13 %33 %48 %48 %33
+          %4 = OpFunction %2 None %3
+          %5 = OpLabel
+               OpSelectionMerge %42 None
+               OpBranchConditional %40 %41 %47
+         %41 = OpLabel
+         %45 = OpFunctionCall %6 %8
+         %46 = OpCompositeConstruct %13 %45 %45 %45 %45
+               OpStore %44 %46
+               OpBranch %42
+         %47 = OpLabel
+               OpStore %44 %49
+               OpBranch %42
+         %42 = OpLabel
+               OpReturn
+               OpFunctionEnd
+          %8 = OpFunction %6 None %7
+          %9 = OpLabel
+         %11 = OpVariable %10 Function
+               OpStore %11 %12
+         %19 = OpAccessChain %18 %15 %17
+         %20 = OpLoad %6 %19
+         %23 = OpFOrdEqual %22 %20 %21
+               OpSelectionMerge %25 None
+               OpBranchConditional %23 %24 %25
+         %24 = OpLabel
+         %27 = OpAccessChain %18 %15 %26
+         %28 = OpLoad %6 %27
+         %30 = OpFOrdEqual %22 %28 %29
+               OpSelectionMerge %32 None
+               OpBranchConditional %30 %31 %32
+         %31 = OpLabel
+         %34 = OpLoad %6 %11
+         %35 = OpFAdd %6 %34 %33
+               OpStore %11 %35
+               OpBranch %32
+         %32 = OpLabel
+         %36 = OpLoad %6 %11
+               OpReturnValue %36
+         %25 = OpLabel
+               OpReturnValue %33
+               OpFunctionEnd
+END
+
+
+BUFFER variant_framebuffer FORMAT B8G8R8A8_UNORM
+
+PIPELINE graphics variant_pipeline
+  ATTACH variant_vertex_shader
+  ATTACH variant_fragment_shader
+  FRAMEBUFFER_SIZE 256 256
+  BIND BUFFER variant_framebuffer AS color LOCATION 0
+END
+CLEAR_COLOR variant_pipeline 0 0 0 255
+
+CLEAR variant_pipeline
+RUN variant_pipeline DRAW_RECT POS 0 0 SIZE 256 256
+
+EXPECT variant_framebuffer IDX 0 0 SIZE 256 256 EQ_RGBA 255 0 0 255