--- config/arm/neon.md	(revision 193005)
+++ config/arm/neon.md	(local)
@@ -4225,16 +4225,29 @@ (define_insn "neon_vtbx4v8qi"
   [(set_attr "neon_type" "neon_bp_3cycle")]
 )
 
-(define_insn "neon_vtrn<mode>_internal"
+(define_expand "neon_vtrn<mode>_internal"
+  [(parallel
+    [(set (match_operand:VDQW 0 "s_register_operand" "")
+	  (unspec:VDQW [(match_operand:VDQW 1 "s_register_operand" "")
+			(match_operand:VDQW 2 "s_register_operand" "")]
+	   UNSPEC_VTRN1))
+     (set (match_operand:VDQW 3 "s_register_operand" "")
+          (unspec:VDQW [(match_dup 1) (match_dup 2)] UNSPEC_VTRN2))])]
+  "TARGET_NEON"
+  ""
+)
+
+;; Note: Different operand numbering to handle tied registers correctly.
+(define_insn "*neon_vtrn<mode>_insn"
   [(set (match_operand:VDQW 0 "s_register_operand" "=w")
         (unspec:VDQW [(match_operand:VDQW 1 "s_register_operand" "0")
-                      (match_operand:VDQW 2 "s_register_operand" "w")]
+                      (match_operand:VDQW 3 "s_register_operand" "2")]
                      UNSPEC_VTRN1))
-   (set (match_operand:VDQW 3 "s_register_operand" "=2")
-         (unspec:VDQW [(match_dup 1) (match_dup 2)]
+   (set (match_operand:VDQW 2 "s_register_operand" "=w")
+         (unspec:VDQW [(match_dup 1) (match_dup 3)]
                      UNSPEC_VTRN2))]
   "TARGET_NEON"
-  "vtrn.<V_sz_elem>\t%<V_reg>0, %<V_reg>3"
+  "vtrn.<V_sz_elem>\t%<V_reg>0, %<V_reg>2"
   [(set (attr "neon_type")
       (if_then_else (match_test "<Is_d_reg>")
                     (const_string "neon_bp_simple")
@@ -4252,16 +4265,29 @@ (define_expand "neon_vtrn<mode>"
   DONE;
 })
 
-(define_insn "neon_vzip<mode>_internal"
+(define_expand "neon_vzip<mode>_internal"
+  [(parallel
+    [(set (match_operand:VDQW 0 "s_register_operand" "")
+	  (unspec:VDQW [(match_operand:VDQW 1 "s_register_operand" "")
+	  	        (match_operand:VDQW 2 "s_register_operand" "")]
+		       UNSPEC_VZIP1))
+    (set (match_operand:VDQW 3 "s_register_operand" "")
+	 (unspec:VDQW [(match_dup 1) (match_dup 2)] UNSPEC_VZIP2))])]
+  "TARGET_NEON"
+  ""
+)
+
+;; Note: Different operand numbering to handle tied registers correctly.
+(define_insn "*neon_vzip<mode>_insn"
   [(set (match_operand:VDQW 0 "s_register_operand" "=w")
         (unspec:VDQW [(match_operand:VDQW 1 "s_register_operand" "0")
-                      (match_operand:VDQW 2 "s_register_operand" "w")]
+                      (match_operand:VDQW 3 "s_register_operand" "2")]
                      UNSPEC_VZIP1))
-   (set (match_operand:VDQW 3 "s_register_operand" "=2")
-        (unspec:VDQW [(match_dup 1) (match_dup 2)]
+   (set (match_operand:VDQW 2 "s_register_operand" "=w")
+        (unspec:VDQW [(match_dup 1) (match_dup 3)]
                      UNSPEC_VZIP2))]
   "TARGET_NEON"
-  "vzip.<V_sz_elem>\t%<V_reg>0, %<V_reg>3"
+  "vzip.<V_sz_elem>\t%<V_reg>0, %<V_reg>2"
   [(set (attr "neon_type")
       (if_then_else (match_test "<Is_d_reg>")
                     (const_string "neon_bp_simple")
@@ -4279,16 +4305,29 @@ (define_expand "neon_vzip<mode>"
   DONE;
 })
 
-(define_insn "neon_vuzp<mode>_internal"
+(define_expand "neon_vuzp<mode>_internal"
+  [(parallel
+    [(set (match_operand:VDQW 0 "s_register_operand" "")
+	  (unspec:VDQW [(match_operand:VDQW 1 "s_register_operand" "")
+			(match_operand:VDQW 2 "s_register_operand" "")]
+	   UNSPEC_VUZP1))
+     (set (match_operand:VDQW 3 "s_register_operand" "")
+	  (unspec:VDQW [(match_dup 1) (match_dup 2)] UNSPEC_VUZP2))])]
+  "TARGET_NEON"
+  ""
+)
+
+;; Note: Different operand numbering to handle tied registers correctly.
+(define_insn "*neon_vuzp<mode>_insn"
   [(set (match_operand:VDQW 0 "s_register_operand" "=w")
         (unspec:VDQW [(match_operand:VDQW 1 "s_register_operand" "0")
-                      (match_operand:VDQW 2 "s_register_operand" "w")]
+                      (match_operand:VDQW 3 "s_register_operand" "2")]
                      UNSPEC_VUZP1))
-   (set (match_operand:VDQW 3 "s_register_operand" "=2")
-        (unspec:VDQW [(match_dup 1) (match_dup 2)]
+   (set (match_operand:VDQW 2 "s_register_operand" "=w")
+        (unspec:VDQW [(match_dup 1) (match_dup 3)]
                      UNSPEC_VUZP2))]
   "TARGET_NEON"
-  "vuzp.<V_sz_elem>\t%<V_reg>0, %<V_reg>3"
+  "vuzp.<V_sz_elem>\t%<V_reg>0, %<V_reg>2"
   [(set (attr "neon_type")
       (if_then_else (match_test "<Is_d_reg>")
                     (const_string "neon_bp_simple")
--- testsuite/gcc.target/arm/pr55073.C	(revision 193005)
+++ testsuite/gcc.target/arm/pr55073.C	(local)
@@ -0,0 +1,74 @@
+/* { dg-do run } */
+/* { dg-require-effective-target arm_neon } */
+/* { dg-options "-O2" } */
+/* { dg-add-options arm_neon } */
+
+#include <arm_neon.h>
+#include <stdlib.h>
+
+struct __attribute__((aligned(16))) _v16u8_ {
+	uint8x16_t val;
+	_v16u8_() { }
+
+	_v16u8_( const  uint8x16_t &src) { val = src; }
+	_v16u8_( const   int16x8_t &src) { val = vreinterpretq_u8_s16(src); }
+	_v16u8_( const  uint32x4_t &src) { val = vreinterpretq_u8_u32(src); }
+
+	operator  uint8x16_t () const { return val; }
+	operator   int8x16_t () const { return vreinterpretq_s8_u8 (val); }
+	operator   int16x8_t () const { return vreinterpretq_s16_u8(val); }
+	operator  uint32x4_t () const { return vreinterpretq_u32_u8(val); }
+	operator   int32x4_t () const { return vreinterpretq_s32_u8(val); }
+};
+typedef struct _v16u8_ v16u8;
+typedef const v16u8 cv16u8;
+
+typedef v16u8 v16i8;
+typedef v16u8 v8i16;
+typedef v16u8 v4u32;
+
+inline v16u8 __attribute__((always_inline)) mergelo( const v16u8 & s, const v16u8 & t )
+{
+	uint8x8x2_t r = vzip_u8( vget_low_u8(s), vget_low_u8(t) );
+	return vcombine_u8( r.val[0], r.val[1] );
+}
+
+inline v8i16 __attribute__((always_inline)) unpacklo(const v16i8 & s)
+{
+	return vmovl_s8( vget_low_s8( s ) );
+}
+
+const uint32_t __attribute__((aligned(16))) _InA [4] = { 0xFF020001, 0xFF020001, 0xFF000101, 0xFF000101 } ;
+const uint32_t __attribute__((aligned(16))) _InB [4] = { 0xFF050002, 0xFF050002, 0xFF000303, 0xFF000203 } ;
+
+__attribute__((noinline)) v16i8 test_func(void)
+{
+	v16u8 A = vld1q_u8( (uint8_t*) _InA );
+	v16u8 B = vld1q_u8( (uint8_t*) _InB );
+	v8i16 r   = vdupq_n_s16(2);
+
+	v16u8 _0 = mergelo( A, B );
+	v16u8 _1 = mergelo( B, A );
+
+	v16u8 _2 = mergelo( _0, _1 );
+	v16u8 _3 = mergelo( _1, _0 );
+
+	v8i16 _4 = vsubq_s16( unpacklo( _2 ), r );
+	v8i16 _5 = vsubq_s16( unpacklo( _3 ), r );
+
+	v8i16 ret = vaddq_s16( _4, _5 );
+
+	return ( ret );
+}
+
+int main (int argc, char **argv)
+{
+	v16u8 val = test_func();
+
+	if (vgetq_lane_u32( val, 0 ) != 0xffffffff
+	    || vgetq_lane_u32( val, 1 ) != 0xffffffff
+	    || vgetq_lane_u32( val, 2 ) != 0xfffcfffc
+	    || vgetq_lane_u32( val, 3 ) != 0xfffcfffc)
+	  abort ();
+	exit (0);
+}