--- /dev/null
+#!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 an unreachable return in a loop
+
+# The test passes because main always writes the color red.
+
+# Optimized using spirv-opt with the following arguments:
+# '--simplify-instructions'
+# '--eliminate-local-single-store'
+# '--simplify-instructions'
+# '--inline-entry-points-exhaustive'
+# '--reduce-load-size'
+# '--eliminate-dead-branches'
+# '--merge-return'
+# '--inline-entry-points-exhaustive'
+# '--private-to-local'
+# '--eliminate-dead-branches'
+# '--merge-return'
+# '--copy-propagate-arrays'
+# '--convert-local-access-chains'
+# '--eliminate-dead-branches'
+# '--merge-return'
+# '--eliminate-local-single-store'
+# '--copy-propagate-arrays'
+# '--scalar-replacement=100'
+# '--eliminate-dead-branches'
+# '--merge-blocks'
+# '--eliminate-dead-branches'
+# '--if-conversion'
+# '--copy-propagate-arrays'
+# '--reduce-load-size'
+# '--eliminate-local-multi-store'
+# '--eliminate-dead-code-aggressive'
+# '--convert-local-access-chains'
+# '--private-to-local'
+# '--if-conversion'
+# spirv-opt commit hash: ad7f2c5c4c7f51360e9e079109a9217aa5ba5cc0
+
+
+
+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;
+#
+# void main()
+# {
+# for(int i = 1; i < 0; i++)
+# return;
+#
+# _GLF_color = vec4(1.0, 0.0, 0.0, 1.0);
+# }
+SHADER fragment variant_fragment_shader SPIRV-ASM
+; SPIR-V
+; Version: 1.0
+; Generator: Khronos Glslang Reference Front End; 7
+; Bound: 43
+; Schema: 0
+ OpCapability Shader
+ %1 = OpExtInstImport "GLSL.std.450"
+ OpMemoryModel Logical GLSL450
+ OpEntryPoint Fragment %4 "main" %25
+ OpExecutionMode %4 OriginUpperLeft
+ OpSource ESSL 310
+ OpName %4 "main"
+ OpName %25 "_GLF_color"
+ OpDecorate %25 Location 0
+ %2 = OpTypeVoid
+ %3 = OpTypeFunction %2
+ %6 = OpTypeInt 32 1
+ %9 = OpConstant %6 1
+ %16 = OpConstant %6 0
+ %17 = OpTypeBool
+ %22 = OpTypeFloat 32
+ %23 = OpTypeVector %22 4
+ %24 = OpTypePointer Output %23
+ %25 = OpVariable %24 Output
+ %26 = OpConstant %22 1
+ %27 = OpConstant %22 0
+ %28 = OpConstantComposite %23 %26 %27 %27 %26
+ %33 = OpConstantFalse %17
+ %36 = OpConstantTrue %17
+ %42 = OpUndef %17
+ %4 = OpFunction %2 None %3
+ %5 = OpLabel
+ OpBranch %30
+ %30 = OpLabel
+ %41 = OpPhi %17 %33 %5 %42 %32
+ OpLoopMerge %29 %32 None
+ OpBranch %10
+ %10 = OpLabel
+ %40 = OpPhi %17 %41 %30 %42 %13
+ %18 = OpSLessThan %17 %9 %16
+ OpLoopMerge %12 %13 None
+ OpBranchConditional %18 %11 %12
+ %11 = OpLabel
+ OpBranch %12
+ %13 = OpLabel
+ OpBranch %10
+ %12 = OpLabel
+ %39 = OpPhi %17 %40 %10 %36 %11
+ OpSelectionMerge %37 None
+ OpBranchConditional %39 %29 %37
+ %37 = OpLabel
+ OpStore %25 %28
+ OpBranch %29
+ %32 = OpLabel
+ OpBranch %30
+ %29 = OpLabel
+ OpReturn
+ OpFunctionEnd
+END
+
+# uniforms for variant
+
+
+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
{ "unreachable-continue-statement.amber", "unreachable-continue-statement", "A fragment shader with unreachable continue statement" },
{ "unreachable-loops.amber", "unreachable-loops", "Fragment shader that writes red despite unreachable loops" },
{ "unreachable-loops-in-switch.amber", "unreachable-loops-in-switch", "A fragment shader with unreachable loops in a switch" },
+ { "unreachable-return-in-loop.amber", "unreachable-return-in-loop", "A fragment shader with an unreachable return in a loop" },
{ "while-inside-switch.amber", "while-inside-switch", "A fragment shader that uses a while loop inside a switch" },
{ "write-before-break.amber", "write-before-break", "Fragment shader that writes red before loop break" },
{ "write-red-after-search.amber", "write-red-after-search", "A fragment shader performing a search computation, then writing red regardless" },
projects / platform / upstream / VK-GL-CTS.git / commitdiff