wgpu/naga/tests/in/spv/empty-global-name.spvasm

;; Make sure we handle globals whose assigned name is "".
;;
;; In MSL, the anonymous global sometimes ends up looking like
;;
;;     struct Blah { int member; } ;
;;
;; where the null name just becomes an empty string before that last semicolon.
;; This is, unfortunately, valid MSL, simply declaring the type Blah, so it will
;; pass validation. However, an attempt to *use* the global will generate a
;; garbage expression like ".member", so we include a function that returns the
;; member's value.

                        OpCapability Shader
                        OpMemoryModel Logical GLSL450
                        OpEntryPoint GLCompute %main "main" %global
                        OpExecutionMode %main LocalSize 1 1 1

                        OpName %global ""
                        OpDecorate %block Block
                        OpMemberDecorate %block 0 Offset 0
                        OpDecorate %global DescriptorSet 0
                        OpDecorate %global Binding 0

                %void = OpTypeVoid
                 %int = OpTypeInt 32 1
               %block = OpTypeStruct %int
             %ptr_int = OpTypePointer StorageBuffer %int
           %ptr_block = OpTypePointer StorageBuffer %block
             %fn_void = OpTypeFunction %void
              %fn_int = OpTypeFunction %int
                %zero = OpConstant %int 0
                 %one = OpConstant %int 1

;; This global is said to have a name of "".
              %global = OpVariable %ptr_block StorageBuffer

                %main = OpFunction %void None %fn_void
        %main_prelude = OpLabel
          %member_ptr = OpAccessChain %ptr_int %global %zero
          %member_val = OpLoad %int %member_ptr
            %plus_one = OpIAdd %int %member_val %one
                        OpStore %member_ptr %plus_one
                        OpReturn
                        OpFunctionEnd