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2026-05-06 23:44:13 +02:00
parent a5f787d80f
commit fd7038b853
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+#!amber
+
+# Copyright 2021 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 NIR 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
+# precision highp float;
+# precision highp int;
+#
+# layout(set = 0, binding = 0) uniform buf0
+# {
+#     int one;
+# };
+#
+# layout(location = 0) out highp vec4 _GLF_color;
+#
+# void main()
+# {
+#
+#     int a = 0;
+#
+#     for (int i = 0; i < 5; i++)
+#     {
+#         // Always false.
+#         if (one == 0)
+#         {
+#             // intBitsToFloat produces NaN. Floor of NaN is undefined, but this
+#             // code is never executed.
+#             if (floor(intBitsToFloat(0xffc00000)) > 0.0)
+#             {
+#                 a = -1;
+#                 break;
+#             }
+#         }
+#
+#         a++;
+#     }
+#
+#     // Always true.
+#     if (a == 5)
+#         _GLF_color = vec4(1, 0, 0, 1);
+#     else
+#         _GLF_color = vec4(0);
+#
+# }
+SHADER fragment variant_fragment_shader SPIRV-ASM TARGET_ENV spv1.0
+; SPIR-V
+; Version: 1.0
+; Generator: Khronos Glslang Reference Front End; 10
+; Bound: 55
+; Schema: 0
+               OpCapability Shader
+          %1 = OpExtInstImport "GLSL.std.450"
+               OpMemoryModel Logical GLSL450
+               OpEntryPoint Fragment %4 "main" %50
+               OpExecutionMode %4 OriginUpperLeft
+               OpSource ESSL 320
+               OpName %4 "main"
+               OpName %8 "a"
+               OpName %10 "i"
+               OpName %20 "buf0"
+               OpMemberName %20 0 "one"
+               OpName %22 ""
+               OpName %50 "_GLF_color"
+               OpMemberDecorate %20 0 Offset 0
+               OpDecorate %20 Block
+               OpDecorate %22 DescriptorSet 0
+               OpDecorate %22 Binding 0
+               OpDecorate %50 Location 0
+          %2 = OpTypeVoid
+          %3 = OpTypeFunction %2
+          %6 = OpTypeInt 32 1
+          %7 = OpTypePointer Function %6
+          %9 = OpConstant %6 0
+         %17 = OpConstant %6 5
+         %18 = OpTypeBool
+         %20 = OpTypeStruct %6
+         %21 = OpTypePointer Uniform %20
+         %22 = OpVariable %21 Uniform
+         %23 = OpTypePointer Uniform %6
+         %29 = OpConstant %6 -4194304
+         %30 = OpTypeFloat 32
+         %33 = OpConstant %30 0
+         %37 = OpConstant %6 -1
+         %40 = OpConstant %6 1
+         %48 = OpTypeVector %30 4
+         %49 = OpTypePointer Output %48
+         %50 = OpVariable %49 Output
+         %51 = OpConstant %30 1
+         %52 = OpConstantComposite %48 %51 %33 %33 %51
+         %54 = OpConstantComposite %48 %33 %33 %33 %33
+          %4 = OpFunction %2 None %3
+          %5 = OpLabel
+          %8 = OpVariable %7 Function
+         %10 = OpVariable %7 Function
+               OpStore %8 %9
+               OpStore %10 %9
+               OpBranch %11
+         %11 = OpLabel
+               OpLoopMerge %13 %14 None
+               OpBranch %15
+         %15 = OpLabel
+         %16 = OpLoad %6 %10
+         %19 = OpSLessThan %18 %16 %17
+               OpBranchConditional %19 %12 %13
+         %12 = OpLabel
+         %24 = OpAccessChain %23 %22 %9
+         %25 = OpLoad %6 %24
+         %26 = OpIEqual %18 %25 %9
+               OpSelectionMerge %28 None
+               OpBranchConditional %26 %27 %28
+         %27 = OpLabel
+         %31 = OpBitcast %30 %29
+         %32 = OpExtInst %30 %1 Floor %31
+         %34 = OpFOrdGreaterThan %18 %32 %33
+               OpSelectionMerge %36 None
+               OpBranchConditional %34 %35 %36
+         %35 = OpLabel
+               OpStore %8 %37
+               OpBranch %13
+         %36 = OpLabel
+               OpBranch %28
+         %28 = OpLabel
+         %39 = OpLoad %6 %8
+         %41 = OpIAdd %6 %39 %40
+               OpStore %8 %41
+               OpBranch %14
+         %14 = OpLabel
+         %42 = OpLoad %6 %10
+         %43 = OpIAdd %6 %42 %40
+               OpStore %10 %43
+               OpBranch %11
+         %13 = OpLabel
+         %44 = OpLoad %6 %8
+         %45 = OpIEqual %18 %44 %17
+               OpSelectionMerge %47 None
+               OpBranchConditional %45 %46 %53
+         %46 = OpLabel
+               OpStore %50 %52
+               OpBranch %47
+         %53 = OpLabel
+               OpStore %50 %54
+               OpBranch %47
+         %47 = OpLabel
+               OpReturn
+               OpFunctionEnd
+END
+
+# uniforms for variant
+
+# one
+BUFFER variant_one DATA_TYPE int32 STD140 DATA
+ 1
+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_one 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