strImmLit s = ImmLit (text s)
litToImm :: CmmLit -> Imm
-litToImm (CmmInt i _) = ImmInteger i
+litToImm (CmmInt i w) = ImmInteger (narrowS w i)
+ -- narrow to the width: a CmmInt might be out of
+ -- range, but we assume that ImmInteger only contains
+ -- in-range values. A signed value should be fine here.
litToImm (CmmFloat f W32) = ImmFloat f
litToImm (CmmFloat f W64) = ImmDouble f
litToImm (CmmLabel l) = ImmCLbl l