--- a/gcc/config/arm/arm.c
+++ b/gcc/config/arm/arm.c
@@ -5073,6 +5073,7 @@ arm_legitimate_address_p (enum machine_m
       rtx xop1 = XEXP (x, 1);
 
       return ((arm_address_register_rtx_p (xop0, strict_p)
+	       && GET_CODE(xop1) == CONST_INT
 	       && arm_legitimate_index_p (mode, xop1, outer, strict_p))
 	      || (arm_address_register_rtx_p (xop1, strict_p)
 		  && arm_legitimate_index_p (mode, xop0, outer, strict_p)));
--- a/gcc/config/arm/arm.md
+++ b/gcc/config/arm/arm.md
@@ -4683,7 +4683,7 @@
 
 (define_expand "extendqihi2"
   [(set (match_dup 2)
-	(ashift:SI (match_operand:QI 1 "general_operand" "")
+	(ashift:SI (match_operand:QI 1 "arm_reg_or_extendqisi_mem_op" "")
 		   (const_int 24)))
    (set (match_operand:HI 0 "s_register_operand" "")
 	(ashiftrt:SI (match_dup 2)
@@ -4708,7 +4708,7 @@
 
 (define_insn "*arm_extendqihi_insn"
   [(set (match_operand:HI 0 "s_register_operand" "=r")
-	(sign_extend:HI (match_operand:QI 1 "memory_operand" "Uq")))]
+	(sign_extend:HI (match_operand:QI 1 "arm_extendqisi_mem_op" "Uq")))]
   "TARGET_ARM && arm_arch4"
   "ldr%(sb%)\\t%0, %1"
   [(set_attr "type" "load_byte")
@@ -4719,7 +4719,7 @@
 
 (define_expand "extendqisi2"
   [(set (match_dup 2)
-	(ashift:SI (match_operand:QI 1 "general_operand" "")
+	(ashift:SI (match_operand:QI 1 "arm_reg_or_extendqisi_mem_op" "")
 		   (const_int 24)))
    (set (match_operand:SI 0 "s_register_operand" "")
 	(ashiftrt:SI (match_dup 2)
@@ -4751,7 +4751,7 @@
 
 (define_insn "*arm_extendqisi"
   [(set (match_operand:SI 0 "s_register_operand" "=r")
-	(sign_extend:SI (match_operand:QI 1 "memory_operand" "Uq")))]
+	(sign_extend:SI (match_operand:QI 1 "arm_extendqisi_mem_op" "Uq")))]
   "TARGET_ARM && arm_arch4 && !arm_arch6"
   "ldr%(sb%)\\t%0, %1"
   [(set_attr "type" "load_byte")
@@ -4762,7 +4762,8 @@
 
 (define_insn "*arm_extendqisi_v6"
   [(set (match_operand:SI 0 "s_register_operand" "=r,r")
-	(sign_extend:SI (match_operand:QI 1 "nonimmediate_operand" "r,Uq")))]
+	(sign_extend:SI
+	 (match_operand:QI 1 "arm_reg_or_extendqisi_mem_op" "r,Uq")))]
   "TARGET_ARM && arm_arch6"
   "@
    sxtb%?\\t%0, %1
--- a/gcc/config/arm/predicates.md
+++ b/gcc/config/arm/predicates.md
@@ -239,6 +239,10 @@
        (match_test "arm_legitimate_address_p (mode, XEXP (op, 0), SIGN_EXTEND,
 					      0)")))
 
+(define_special_predicate "arm_reg_or_extendqisi_mem_op"
+  (ior (match_operand 0 "arm_extendqisi_mem_op")
+       (match_operand 0 "s_register_operand")))
+
 (define_predicate "power_of_two_operand"
   (match_code "const_int")
 {
