+#!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 a for loop condition being always false
+
+# An always false condition is passed to a for loop inside a function. The test passes if red color is written after the for loop.
+
+# Optimized using spirv-opt with the following arguments:
+# '--eliminate-dead-branches'
+# '--merge-blocks'
+# '--vector-dce'
+# '--eliminate-dead-branches'
+# '--merge-blocks'
+# '--eliminate-dead-code-aggressive'
+# '--eliminate-local-single-block'
+# '--private-to-local'
+# '--convert-local-access-chains'
+# '--simplify-instructions'
+# '--eliminate-dead-inserts'
+# '--copy-propagate-arrays'
+# '--simplify-instructions'
+# '--eliminate-dead-code-aggressive'
+# '--eliminate-local-multi-store'
+# spirv-opt commit hash: 9559cdbdf011c487f67f89e2d694bd4a18d5c1e0
+
+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 color;
+#
+# vec3 drawShape(vec2 pos)
+# {
+# bool c3;
+# c3 = pos.y < 1.0;
+# for(
+# ivec2(8576, 72916);
+# c3;
+# bvec2(false, false)
+# )
+# {
+# return vec3(1.0);
+# }
+# return vec3(1.0);
+# }
+# void main()
+# {
+# drawShape(vec2(1.0));
+# color = vec4(1, 0, 0, 1);
+# }
+SHADER fragment variant_fragment_shader SPIRV-ASM
+; SPIR-V
+; Version: 1.0
+; Generator: Khronos Glslang Reference Front End; 7
+; Bound: 52
+; Schema: 0
+ OpCapability Shader
+ %1 = OpExtInstImport "GLSL.std.450"
+ OpMemoryModel Logical GLSL450
+ OpEntryPoint Fragment %4 "main" %47
+ OpExecutionMode %4 OriginUpperLeft
+ OpSource ESSL 310
+ OpName %4 "main"
+ OpName %12 "drawShape(vf2;"
+ OpName %11 "pos"
+ OpName %16 "c3"
+ OpName %43 "param"
+ OpName %47 "color"
+ OpDecorate %47 Location 0
+ %2 = OpTypeVoid
+ %3 = OpTypeFunction %2
+ %6 = OpTypeFloat 32
+ %7 = OpTypeVector %6 2
+ %8 = OpTypePointer Function %7
+ %9 = OpTypeVector %6 3
+ %10 = OpTypeFunction %9 %8
+ %14 = OpTypeBool
+ %15 = OpTypePointer Function %14
+ %17 = OpTypeInt 32 0
+ %18 = OpConstant %17 1
+ %19 = OpTypePointer Function %6
+ %22 = OpConstant %6 1
+ %35 = OpConstantComposite %9 %22 %22 %22
+ %42 = OpConstantComposite %7 %22 %22
+ %45 = OpTypeVector %6 4
+ %46 = OpTypePointer Output %45
+ %47 = OpVariable %46 Output
+ %48 = OpConstant %6 0
+ %49 = OpConstantComposite %45 %22 %48 %48 %22
+ %51 = OpUndef %14
+ %4 = OpFunction %2 None %3
+ %5 = OpLabel
+ %43 = OpVariable %8 Function
+ OpStore %43 %42
+ %44 = OpFunctionCall %9 %12 %43
+ OpStore %47 %49
+ OpReturn
+ OpFunctionEnd
+ %12 = OpFunction %9 None %10
+ %11 = OpFunctionParameter %8
+ %13 = OpLabel
+ %16 = OpVariable %15 Function
+ %20 = OpAccessChain %19 %11 %18
+ %21 = OpLoad %6 %20
+ %23 = OpFOrdLessThan %14 %21 %22
+ OpStore %16 %23
+ OpBranch %29
+ %29 = OpLabel
+ %50 = OpPhi %14 %23 %13 %51 %32
+ OpLoopMerge %31 %32 None
+ OpBranchConditional %50 %30 %31
+ %30 = OpLabel
+ OpReturnValue %35
+ %32 = OpLabel
+ OpBranch %29
+ %31 = OpLabel
+ OpReturnValue %35
+ 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