Added coverage test 0720

coverage/PENDING_SUBMIT/amdvlk/0720-COVERAGE-instruction-simplify-3236/cov-nested-loops-return-inside-while-never-executed.amber

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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 _int_1 _GLF_uniform_int_values[0]
+# #define _int_0 _GLF_uniform_int_values[1]
+#
+# precision highp float;
+# precision highp int;
+#
+# // Contents of _GLF_uniform_int_values: [1, 0]
+# layout(set = 0, binding = 0) uniform buf0
+# {
+#     int _GLF_uniform_int_values[2];
+# };
+#
+# layout(location = 0) out vec4 _GLF_color;
+#
+# void main()
+# {
+#     _GLF_color = vec4(_int_0);
+#
+#     // Iterates once with i = 1.
+#     for(int i = 1; i <= 1; i *= 2)
+#     {
+#         // Iterates once with j = 0.
+#         for(int j = 0; j < 1; j += 2 * i)
+#         {
+#             // k = 1 + 0 + 1 = 2
+#             int k = i + j + 1;
+#
+#             // Never iterates.
+#             while((j + i) >= _int_1 && k <= min(j + 2 * i, 1))
+#             {
+#                 return;
+#             }
+#         }
+#     }
+#
+#     _GLF_color = vec4(_int_1, _int_0, _int_0, _int_1);
+# }
+SHADER fragment variant_fragment_shader SPIRV-ASM TARGET_ENV spv1.0
+; SPIR-V
+; Version: 1.0
+; Generator: Khronos Glslang Reference Front End; 10
+; Bound: 89
+; Schema: 0
+               OpCapability Shader
+          %1 = OpExtInstImport "GLSL.std.450"
+               OpMemoryModel Logical GLSL450
+               OpEntryPoint Fragment %4 "main" %9
+               OpExecutionMode %4 OriginUpperLeft
+               OpSource ESSL 320
+               OpName %4 "main"
+               OpName %9 "_GLF_color"
+               OpName %14 "buf0"
+               OpMemberName %14 0 "_GLF_uniform_int_values"
+               OpName %16 ""
+               OpName %25 "i"
+               OpName %34 "j"
+               OpName %42 "k"
+               OpDecorate %9 Location 0
+               OpDecorate %13 ArrayStride 16
+               OpMemberDecorate %14 0 Offset 0
+               OpDecorate %14 Block
+               OpDecorate %16 DescriptorSet 0
+               OpDecorate %16 Binding 0
+          %2 = OpTypeVoid
+          %3 = OpTypeFunction %2
+          %6 = OpTypeFloat 32
+          %7 = OpTypeVector %6 4
+          %8 = OpTypePointer Output %7
+          %9 = OpVariable %8 Output
+         %10 = OpTypeInt 32 1
+         %11 = OpTypeInt 32 0
+         %12 = OpConstant %11 2
+         %13 = OpTypeArray %10 %12
+         %14 = OpTypeStruct %13
+         %15 = OpTypePointer Uniform %14
+         %16 = OpVariable %15 Uniform
+         %17 = OpConstant %10 0
+         %18 = OpConstant %10 1
+         %19 = OpTypePointer Uniform %10
+         %24 = OpTypePointer Function %10
+         %32 = OpTypeBool
+         %62 = OpConstant %10 2
+          %4 = OpFunction %2 None %3
+          %5 = OpLabel
+         %25 = OpVariable %24 Function
+         %34 = OpVariable %24 Function
+         %42 = OpVariable %24 Function
+         %20 = OpAccessChain %19 %16 %17 %18
+         %21 = OpLoad %10 %20
+         %22 = OpConvertSToF %6 %21
+         %23 = OpCompositeConstruct %7 %22 %22 %22 %22
+               OpStore %9 %23
+               OpStore %25 %18
+               OpBranch %26
+         %26 = OpLabel
+               OpLoopMerge %28 %29 None
+               OpBranch %30
+         %30 = OpLabel
+         %31 = OpLoad %10 %25
+         %33 = OpSLessThanEqual %32 %31 %18
+               OpBranchConditional %33 %27 %28
+         %27 = OpLabel
+               OpStore %34 %17
+               OpBranch %35
+         %35 = OpLabel
+               OpLoopMerge %37 %38 None
+               OpBranch %39
+         %39 = OpLabel
+         %40 = OpLoad %10 %34
+         %41 = OpSLessThan %32 %40 %18
+               OpBranchConditional %41 %36 %37
+         %36 = OpLabel
+         %43 = OpLoad %10 %25
+         %44 = OpLoad %10 %34
+         %45 = OpIAdd %10 %43 %44
+         %46 = OpIAdd %10 %45 %18
+               OpStore %42 %46
+               OpBranch %47
+         %47 = OpLabel
+               OpLoopMerge %49 %50 None
+               OpBranch %51
+         %51 = OpLabel
+         %52 = OpLoad %10 %34
+         %53 = OpLoad %10 %25
+         %54 = OpIAdd %10 %52 %53
+         %55 = OpAccessChain %19 %16 %17 %17
+         %56 = OpLoad %10 %55
+         %57 = OpSGreaterThanEqual %32 %54 %56
+               OpSelectionMerge %59 None
+               OpBranchConditional %57 %58 %59
+         %58 = OpLabel
+         %60 = OpLoad %10 %42
+         %61 = OpLoad %10 %34
+         %63 = OpLoad %10 %25
+         %64 = OpIMul %10 %62 %63
+         %65 = OpIAdd %10 %61 %64
+         %66 = OpExtInst %10 %1 SMin %65 %18
+         %67 = OpSLessThanEqual %32 %60 %66
+               OpBranch %59
+         %59 = OpLabel
+         %68 = OpPhi %32 %57 %51 %67 %58
+               OpBranchConditional %68 %48 %49
+         %48 = OpLabel
+               OpReturn
+         %50 = OpLabel
+               OpBranch %47
+         %49 = OpLabel
+               OpBranch %38
+         %38 = OpLabel
+         %70 = OpLoad %10 %25
+         %71 = OpIMul %10 %62 %70
+         %72 = OpLoad %10 %34
+         %73 = OpIAdd %10 %72 %71
+               OpStore %34 %73
+               OpBranch %35
+         %37 = OpLabel
+               OpBranch %29
+         %29 = OpLabel
+         %74 = OpLoad %10 %25
+         %75 = OpIMul %10 %74 %62
+               OpStore %25 %75
+               OpBranch %26
+         %28 = OpLabel
+         %76 = OpAccessChain %19 %16 %17 %17
+         %77 = OpLoad %10 %76
+         %78 = OpConvertSToF %6 %77
+         %79 = OpAccessChain %19 %16 %17 %18
+         %80 = OpLoad %10 %79
+         %81 = OpConvertSToF %6 %80
+         %82 = OpAccessChain %19 %16 %17 %18
+         %83 = OpLoad %10 %82
+         %84 = OpConvertSToF %6 %83
+         %85 = OpAccessChain %19 %16 %17 %17
+         %86 = OpLoad %10 %85
+         %87 = OpConvertSToF %6 %86
+         %88 = OpCompositeConstruct %7 %78 %81 %84 %87
+               OpStore %9 %88
+               OpReturn
+               OpFunctionEnd
+END
+
+# uniforms for variant
+
+# _GLF_uniform_int_values
+BUFFER variant__GLF_uniform_int_values DATA_TYPE int32[] STD140 DATA
+ 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__GLF_uniform_int_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 256 256
+
+EXPECT variant_framebuffer IDX 0 0 SIZE 256 256 EQ_RGBA 255 0 0 255

coverage/PENDING_SUBMIT/amdvlk/0720-COVERAGE-instruction-simplify-3236/generate_cts_test.py

@@ -0,0 +1,57 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+
+# Copyright 2021 The GraphicsFuzz Project Authors
+#
+# 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
+#
+#     https://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.
+
+"""Generate a CTS test.
+
+This module/script is copied next to a specific test in your repository of bugs
+to generate an Amber script test suitable for adding to the CTS.
+In particular, the Amber script test is suitable for use with |add_amber_tests_to_cts.py|.
+"""
+
+import sys
+from pathlib import Path
+
+from gfauto import tool, util
+
+
+def main() -> None:
+
+    # Checklist:
+    # - check output_amber
+    # - check short_description
+    # - check comment_text
+    # - check copyright_year
+    # - check extra_commands
+
+    bug_dir = util.norm_path(Path(__file__).absolute()).parent
+
+    tool.glsl_shader_job_crash_to_amber_script_for_google_cts(
+        source_dir=bug_dir / "reduced_manual",
+        output_amber=bug_dir / "cov-nested-loops-return-inside-while-never-executed.amber",
+        work_dir=bug_dir / "work",
+        # One sentence, 58 characters max., no period, no line breaks.
+        short_description="A fragment shader that covers specific LLVM code paths",
+        comment_text="""The test passes because the shader always writes red.""",
+        copyright_year="2022",
+        extra_commands=tool.AMBER_COMMAND_EXPECT_RED,
+        is_coverage_gap=True,
+    )
+
+
+if __name__ == "__main__":
+    main()
+    sys.exit(0)