diff -Naurp gcc/config/avr/avr.h gcc/config/avr/avr.h
--- gcc/config/avr/avr.h	2011-06-22 10:28:47.000000000 +0530
+++ gcc/config/avr/avr.h	2011-06-22 10:35:08.000000000 +0530
@@ -136,7 +136,7 @@ extern GTY(()) section *progmem_section;
 #define AVR_2_BYTE_PC (!AVR_HAVE_EIJMP_EICALL)
 #define AVR_3_BYTE_PC (AVR_HAVE_EIJMP_EICALL)
 
-#define AVR_IO_OFFSET (AVR_XMEGA ? 0 : 0x20)
+#define AVR_IO_OFFSET ((AVR_XMEGA || AVR_TINY) ? 0 : 0x20)
 #define AVR_RAMPD_ADDR (AVR_XMEGA ? 0x38 : 0)
 #define AVR_RAMPX_ADDR (AVR_XMEGA ? 0x39 : 0)
 #define AVR_RAMPY_ADDR (AVR_XMEGA ? 0x3A : 0)
diff -Naurp gcc/config/avr/predicates.md gcc/config/avr/predicates.md
--- gcc/config/avr/predicates.md	2011-06-22 10:25:29.000000000 +0530
+++ gcc/config/avr/predicates.md	2011-06-22 10:35:08.000000000 +0530
@@ -50,21 +50,24 @@
 ;; Return true if OP is a valid address for lower half of I/O space.
 (define_predicate "low_io_address_operand"
   (and (match_code "const_int")
-       (if_then_else (match_test "AVR_XMEGA") 
+       (if_then_else (ior (match_test "AVR_XMEGA")
+				          (match_test "AVR_TINY")) 
                      (match_test "IN_RANGE((INTVAL (op)), 0x00, 0x1F)")
 	             (match_test "IN_RANGE((INTVAL (op)), 0x20, 0x3F)"))))
 
 ;; Return true if OP is a valid address for high half of I/O space.
 (define_predicate "high_io_address_operand"
   (and (match_code "const_int")
-       (if_then_else (match_test "AVR_XMEGA") 
+       (if_then_else (ior (match_test "AVR_XMEGA")
+				          (match_test "AVR_TINY")) 
                      (match_test "IN_RANGE((INTVAL (op)), 0x20, 0x3F)")
 	             (match_test "IN_RANGE((INTVAL (op)), 0x40, 0x5F)"))))
 
 ;; Return true if OP is a valid address of I/O space.
 (define_predicate "io_address_operand"
   (and (match_code "const_int")
-       (if_then_else (match_test "AVR_XMEGA") 
+       (if_then_else (ior (match_test "AVR_XMEGA")
+				          (match_test "AVR_TINY")) 
        		(match_test "IN_RANGE((INTVAL (op)), 0x0, (0x40 - GET_MODE_SIZE(mode)))")
        		(match_test "IN_RANGE((INTVAL (op)), 0x20, (0x60 - GET_MODE_SIZE(mode)))"))))