cmmIndex :: DynFlags
         -> Width       -- Width w
         -> CmmExpr     -- Address of vector of items of width w
         -> Int         -- Which element of the vector (0 based)
         -> CmmExpr     -- Address of i'th element
cmmIndex dflags width base idx = cmmOffset dflags base (idx * widthInBytes width)
cmmIndex :: DynFlags
         -> Width       -- Width w
         -> CmmExpr     -- Address of vector of items of width w
         -> Int         -- Which element of the vector (0 based)
         -> CmmExpr
cmmIndex dflags width base idx = cmmOffset dflags base (idx * widthInBytes width)
cmmIndex dflags width base idx = cmmOffset dflags base (idx * widthInBytes width)