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vulkan/amber/graphicsfuzz/if-and-switch.amber

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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: A fragment shader with a switch and some data flow
+
+# Checks that all pixels are red.
+# Passes because main always writes red to _GLF_color.
+
+# Optimized using spirv-opt with the following arguments:
+# '-Os'
+
+# Derived from the following GLSL.
+
+# Fragment shader GLSL:
+# #version 310 es
+#
+# precision highp float;
+#
+# layout(location = 0) out vec4 _GLF_color;
+#
+# layout(set = 0, binding = 0) uniform buf0
+# {
+#   vec2 injectionSwitch;
+# };
+#
+# void main()
+# {
+#   float data[2];
+#   data[0] = injectionSwitch.x;
+#   data[1] = injectionSwitch.x;
+#
+#   _GLF_color = vec4(1.0, 0.0, 0.0, 1.0);
+#
+#   if (data[1] > 1.0)
+#   {
+#     switch (int(injectionSwitch.x))
+#     {
+#     case 0:
+#       float temp = 1.0;
+#     case 1:
+#       data[int(injectionSwitch.x)] = temp;
+#       _GLF_color = vec4(0.0, 0.0, 0.0, 0.0);
+#     default:
+#       break;
+#     }
+#   }
+# }
+
+SHADER vertex variant_vertex_shader PASSTHROUGH
+
+SHADER fragment variant_fragment_shader SPIRV-ASM TARGET_ENV spv1.0
+; SPIR-V
+; Version: 1.0
+; Generator: Khronos Glslang Reference Front End; 7
+; Bound: 58
+; Schema: 0
+               OpCapability Shader
+          %1 = OpExtInstImport "GLSL.std.450"
+               OpMemoryModel Logical GLSL450
+               OpEntryPoint Fragment %4 "main" %30
+               OpExecutionMode %4 OriginUpperLeft
+               OpSource ESSL 310
+               OpName %4 "main"
+               OpName %11 "data"
+               OpName %15 "buf0"
+               OpMemberName %15 0 "injectionSwitch"
+               OpName %17 ""
+               OpName %30 "_GLF_color"
+               OpMemberDecorate %15 0 Offset 0
+               OpDecorate %15 Block
+               OpDecorate %17 DescriptorSet 0
+               OpDecorate %17 Binding 0
+               OpDecorate %30 Location 0
+          %2 = OpTypeVoid
+          %3 = OpTypeFunction %2
+          %6 = OpTypeFloat 32
+          %7 = OpTypeInt 32 0
+          %8 = OpConstant %7 2
+          %9 = OpTypeArray %6 %8
+         %10 = OpTypePointer Function %9
+         %12 = OpTypeInt 32 1
+         %13 = OpConstant %12 0
+         %14 = OpTypeVector %6 2
+         %15 = OpTypeStruct %14
+         %16 = OpTypePointer Uniform %15
+         %17 = OpVariable %16 Uniform
+         %18 = OpConstant %7 0
+         %19 = OpTypePointer Uniform %6
+         %22 = OpTypePointer Function %6
+         %24 = OpConstant %12 1
+         %28 = OpTypeVector %6 4
+         %29 = OpTypePointer Output %28
+         %30 = OpVariable %29 Output
+         %31 = OpConstant %6 1
+         %32 = OpConstant %6 0
+         %33 = OpConstantComposite %28 %31 %32 %32 %31
+         %36 = OpTypeBool
+         %53 = OpConstantComposite %28 %32 %32 %32 %32
+         %57 = OpUndef %6
+          %4 = OpFunction %2 None %3
+          %5 = OpLabel
+         %11 = OpVariable %10 Function
+         %20 = OpAccessChain %19 %17 %13 %18
+         %21 = OpLoad %6 %20
+         %23 = OpAccessChain %22 %11 %13
+               OpStore %23 %21
+         %27 = OpAccessChain %22 %11 %24
+               OpStore %27 %21
+               OpStore %30 %33
+         %35 = OpLoad %6 %27
+         %37 = OpFOrdGreaterThan %36 %35 %31
+               OpSelectionMerge %39 None
+               OpBranchConditional %37 %38 %39
+         %38 = OpLabel
+         %42 = OpConvertFToS %12 %21
+               OpSelectionMerge %45 None
+               OpSwitch %42 %45 0 %43 1 %44
+         %45 = OpLabel
+               OpBranch %39
+         %43 = OpLabel
+               OpBranch %44
+         %44 = OpLabel
+         %56 = OpPhi %6 %57 %38 %31 %43
+         %52 = OpAccessChain %22 %11 %42
+               OpStore %52 %56
+               OpStore %30 %53
+               OpBranch %45
+         %39 = OpLabel
+               OpReturn
+               OpFunctionEnd
+END
+
+# uniforms for variant
+
+# injectionSwitch
+BUFFER variant_injectionSwitch DATA_TYPE vec2<float> DATA
+ 0.0 1.0
+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
+  BIND BUFFER variant_injectionSwitch 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 256 256
+
+EXPECT variant_framebuffer IDX 0 0 SIZE 256 256 EQ_RGBA 255 0 0 255