gcc svn 142778:

PR target/37436
* arm.c (arm_legitimate_index): Only accept addresses that are in
canonical form.
* predicates.md (arm_reg_or_extendqisi_mem_op): New predicate.
* arm.md (extendqihi2): Use arm_reg_or_extendqisi_mem_op predicate
for operand1.
(extendqisi2): Likewise.
(arm_extendqisi, arm_extendqisi_v6): Use arm_extendqisi_mem_op
predicate for operand1.

diff -Nura gcc-4.3.3.orig/gcc/config/arm/arm.c gcc-4.3.3/gcc/config/arm/arm.c
--- gcc-4.3.3.orig/gcc/config/arm/arm.c	2008-06-11 07:52:55.000000000 -0300
+++ gcc-4.3.3/gcc/config/arm/arm.c	2009-05-21 16:06:45.000000000 -0300
@@ -3769,6 +3769,7 @@
       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)));
diff -Nura gcc-4.3.3.orig/gcc/config/arm/arm.md gcc-4.3.3/gcc/config/arm/arm.md
--- gcc-4.3.3.orig/gcc/config/arm/arm.md	2007-09-04 01:44:47.000000000 -0300
+++ gcc-4.3.3/gcc/config/arm/arm.md	2009-05-21 16:06:45.000000000 -0300
@@ -4199,7 +4199,7 @@
 
 (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)
@@ -4224,7 +4224,7 @@
 
 (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")
@@ -4235,7 +4235,7 @@
 
 (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)
@@ -4267,7 +4267,7 @@
 
 (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")
@@ -4278,7 +4278,8 @@
 
 (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
diff -Nura gcc-4.3.3.orig/gcc/config/arm/predicates.md gcc-4.3.3/gcc/config/arm/predicates.md
--- gcc-4.3.3.orig/gcc/config/arm/predicates.md	2007-08-02 07:49:31.000000000 -0300
+++ gcc-4.3.3/gcc/config/arm/predicates.md	2009-05-21 16:06:45.000000000 -0300
@@ -234,6 +234,10 @@
        (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")
 {