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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 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 int;
+# precision highp float;
+#
+# layout(location = 0) out vec4 _GLF_color;
+#
+# void main()
+# {
+#     float f = 2.0;
+#
+#     // Always true.
+#     if(exp2(f) == 4.0)
+#         _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: 25
+; Schema: 0
+               OpCapability Shader
+          %1 = OpExtInstImport "GLSL.std.450"
+               OpMemoryModel Logical GLSL450
+               OpEntryPoint Fragment %4 "main" %19
+               OpExecutionMode %4 OriginUpperLeft
+               OpSource ESSL 320
+               OpName %4 "main"
+               OpName %8 "f"
+               OpName %19 "_GLF_color"
+               OpDecorate %19 Location 0
+          %2 = OpTypeVoid
+          %3 = OpTypeFunction %2
+          %6 = OpTypeFloat 32
+          %7 = OpTypePointer Function %6
+          %9 = OpConstant %6 2
+         %12 = OpConstant %6 4
+         %13 = OpTypeBool
+         %17 = OpTypeVector %6 4
+         %18 = OpTypePointer Output %17
+         %19 = OpVariable %18 Output
+         %20 = OpConstant %6 1
+         %21 = OpConstant %6 0
+         %22 = OpConstantComposite %17 %20 %21 %21 %20
+         %24 = OpConstantComposite %17 %21 %21 %21 %21
+          %4 = OpFunction %2 None %3
+          %5 = OpLabel
+          %8 = OpVariable %7 Function
+               OpStore %8 %9
+         %10 = OpLoad %6 %8
+         %11 = OpExtInst %6 %1 Exp2 %10
+         %14 = OpFOrdEqual %13 %11 %12
+               OpSelectionMerge %16 None
+               OpBranchConditional %14 %15 %23
+         %15 = OpLabel
+               OpStore %19 %22
+               OpBranch %16
+         %23 = OpLabel
+               OpStore %19 %24
+               OpBranch %16
+         %16 = OpLabel
+               OpReturn
+               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