external/vulkancts/data/vulkan/amber/graphicsfuzz/continue-and-merge.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; reduced by spirv-fuzz and by hand.
# A fragment shader with two nested loops. All loop conditions are false.
# Block %45 is both a continue block and a merge block.
# We check that all pixels are red. The test passes because the final statement
# writes red to _GLF_color.

[vertex shader passthrough]

[fragment shader spirv]
               OpCapability Shader
          %1 = OpExtInstImport "GLSL.std.450"
               OpMemoryModel Logical GLSL450
               OpEntryPoint Fragment %main "main" %_GLF_color
               OpExecutionMode %main OriginUpperLeft
               OpSource ESSL 310
               OpName %main "main"
               OpName %_GLF_color "_GLF_color"
               OpDecorate %_GLF_color Location 0
       %void = OpTypeVoid
          %6 = OpTypeFunction %void
      %float = OpTypeFloat 32
    %float_1 = OpConstant %float 1
    %float_0 = OpConstant %float 0
    %v4float = OpTypeVector %float 4
        %red = OpConstantComposite %v4float %float_1 %float_0 %float_0 %float_1
%_ptr_Output_v4float = OpTypePointer Output %v4float
 %_GLF_color = OpVariable %_ptr_Output_v4float Output
       %bool = OpTypeBool
       %true = OpConstantTrue %bool
      %false = OpConstantFalse %bool

       %main = OpFunction %void None %6
         %23 = OpLabel
               OpBranch %42
         %42 = OpLabel
               OpLoopMerge %47 %45 None
               OpBranchConditional %false %49 %47
            %49 = OpLabel
                  OpLoopMerge %45 %52 None
                  OpBranchConditional %false %45 %45
                %52 = OpLabel
                      OpBranch %49
            %45 = OpLabel
                  OpBranch %42
         %47 = OpLabel
               OpStore %_GLF_color %red
               OpReturn
               OpFunctionEnd


[test]
draw rect -1 -1 2 2
probe all rgba 1 0 0 1