spv.merge-unreachable.frag
// Module Version 10000
// Generated by (magic number): 8000a
// Id's are bound by 25

                              Capability Shader
               1:             ExtInstImport  "GLSL.std.450"
                              MemoryModel Logical GLSL450
                              EntryPoint Fragment 4  "main" 9
                              ExecutionMode 4 OriginUpperLeft
                              Source GLSL 450
                              Name 4  "main"
                              Name 9  "v"
                              Decorate 9(v) Location 1
               2:             TypeVoid
               3:             TypeFunction 2
               6:             TypeFloat 32
               7:             TypeVector 6(float) 4
               8:             TypePointer Input 7(fvec4)
            9(v):      8(ptr) Variable Input
              11:    6(float) Constant 1036831949
              12:    6(float) Constant 1045220557
              13:    6(float) Constant 1050253722
              14:    6(float) Constant 1053609165
              15:    7(fvec4) ConstantComposite 11 12 13 14
              16:             TypeBool
              17:             TypeVector 16(bool) 4
         4(main):           2 Function None 3
               5:             Label
              10:    7(fvec4) Load 9(v)
              18:   17(bvec4) FOrdEqual 10 15
              19:    16(bool) All 18
                              SelectionMerge 21 None
                              BranchConditional 19 20 23
              20:               Label
                                Kill
              23:               Label
                                Return
              21:             Label
                              Unreachable
                              FunctionEnd