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2026-05-06 23:44:13 +02:00
parent a5f787d80f
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+#!amber
+
+# Copyright 2019 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 bug found by GraphicsFuzz.
+
+# Short description: Fragment shader that writes red despite unreachable loops
+
+# The test passes because red is written, and the loops inside the if (one of
+# which would be infinite) are dynamically unreachable due to the runtime content
+# of 'injected'.
+
+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;
+#
+# layout(set = 0, binding = 0) uniform buf0 {
+#  vec2 injected;
+# };
+#
+# void main()
+# {
+#  _GLF_color = vec4(1.0, 0.0, 0.0, 1.0);
+#  if (injected.x > injected.y) {
+#    do
+#     {
+#     }
+#    while(false);
+#    {
+#     for(
+#         int m = 1;
+#         true;
+#         1
+#     )
+#      {
+#        _GLF_color = vec4(1.0, 0.0, 0.0, 1.0);
+#      }
+#    }
+#  }
+# }
+SHADER fragment variant_fragment_shader SPIRV-ASM TARGET_ENV spv1.0
+; SPIR-V
+; Version: 1.0
+; Generator: Khronos Glslang Reference Front End; 7
+; Bound: 45
+; Schema: 0
+               OpCapability Shader
+          %1 = OpExtInstImport "GLSL.std.450"
+               OpMemoryModel Logical GLSL450
+               OpEntryPoint Fragment %4 "main" %9
+               OpExecutionMode %4 OriginUpperLeft
+               OpSource ESSL 310
+               OpName %4 "main"
+               OpName %9 "_GLF_color"
+               OpName %14 "buf0"
+               OpMemberName %14 0 "injected"
+               OpName %16 ""
+               OpName %37 "m"
+               OpDecorate %9 Location 0
+               OpMemberDecorate %14 0 Offset 0
+               OpDecorate %14 Block
+               OpDecorate %16 DescriptorSet 0
+               OpDecorate %16 Binding 0
+               OpDecorate %37 RelaxedPrecision
+          %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 = OpConstant %6 0
+         %12 = OpConstantComposite %7 %10 %11 %11 %10
+         %13 = OpTypeVector %6 2
+         %14 = OpTypeStruct %13
+         %15 = OpTypePointer Uniform %14
+         %16 = OpVariable %15 Uniform
+         %17 = OpTypeInt 32 1
+         %18 = OpConstant %17 0
+         %19 = OpTypeInt 32 0
+         %20 = OpConstant %19 0
+         %21 = OpTypePointer Uniform %6
+         %24 = OpConstant %19 1
+         %27 = OpTypeBool
+         %35 = OpConstantFalse %27
+         %36 = OpTypePointer Function %17
+         %38 = OpConstant %17 1
+         %44 = OpConstantTrue %27
+          %4 = OpFunction %2 None %3
+          %5 = OpLabel
+         %37 = OpVariable %36 Function
+               OpStore %9 %12
+         %22 = OpAccessChain %21 %16 %18 %20
+         %23 = OpLoad %6 %22
+         %25 = OpAccessChain %21 %16 %18 %24
+         %26 = OpLoad %6 %25
+         %28 = OpFOrdGreaterThan %27 %23 %26
+               OpSelectionMerge %30 None
+               OpBranchConditional %28 %29 %30
+         %29 = OpLabel
+               OpBranch %31
+         %31 = OpLabel
+               OpLoopMerge %33 %34 None
+               OpBranch %32
+         %32 = OpLabel
+               OpBranch %34
+         %34 = OpLabel
+               OpBranchConditional %35 %31 %33
+         %33 = OpLabel
+               OpStore %37 %38
+               OpBranch %39
+         %39 = OpLabel
+               OpLoopMerge %41 %42 None
+               OpBranch %43
+         %43 = OpLabel
+               OpBranchConditional %44 %40 %41
+         %40 = OpLabel
+               OpStore %9 %12
+               OpBranch %42
+         %42 = OpLabel
+               OpBranch %39
+         %41 = OpLabel
+               OpBranch %30
+         %30 = OpLabel
+               OpReturn
+               OpFunctionEnd
+END
+
+# uniforms for variant
+
+# resolution
+BUFFER variant_resolution DATA_TYPE vec2<float> DATA
+ 0.0 1.0
+END
+
+BUFFER framebuffer FORMAT B8G8R8A8_UNORM
+
+PIPELINE graphics gfz_pipeline
+  ATTACH variant_vertex_shader
+  ATTACH variant_fragment_shader
+  FRAMEBUFFER_SIZE 256 256
+  BIND BUFFER framebuffer AS color LOCATION 0
+  BIND BUFFER variant_resolution AS uniform DESCRIPTOR_SET 0 BINDING 0
+END
+CLEAR_COLOR gfz_pipeline 0 0 0 255
+
+CLEAR gfz_pipeline
+RUN gfz_pipeline DRAW_RECT POS 0 0 SIZE 256 256
+EXPECT framebuffer IDX 0 0 SIZE 256 256 EQ_RGB 255 0 0