Mine

; ModuleID = 'test.bc'
        %"3dgs1S" = type { i32 }

define fastcc i32 @f() {
entry:
        %s = alloca %"3dgs1S"           ; <%"3dgs1S"*> [#uses=3]
        %tmp2 = alloca %"3dgs1S"                ; <%"3dgs1S"*> [#uses=2]
        %tmp1 = getelementptr %"3dgs1S"* %s, i32 0, i32 0               ; <i32*> [#uses=1]
        store i32 42, i32* %tmp1
        %tmp3 = bitcast %"3dgs1S"* %tmp2 to i8*         ; <i8*> [#uses=1]
        %tmp4 = bitcast %"3dgs1S"* %s to i8*            ; <i8*> [#uses=1]
        call void @llvm.memcpy.i32( i8* %tmp3, i8* %tmp4, i32 4, i32 0 )
        %tmp5 = call fastcc i32 @g( %"3dgs1S"* %tmp2 )         ; <i32> [#uses=1]
        ret i32 %tmp5
}

declare void @llvm.memset.i32(i8*, i8, i32, i32)

define fastcc i32 @g(%"3dgs1S"* %s) {
entry:
        %tmp = getelementptr %"3dgs1S"* %s, i32 0, i32 0                ; <i32*> [#uses=1]
        %tmp1 = load i32* %tmp          ; <i32> [#uses=1]
        ret i32 %tmp1
}

declare void @llvm.memcpy.i32(i8*, i8*, i32, i32)