diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 7ebce8dd4de..b3cb2338dc4 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,12 @@
+2012-01-27  Aldy Hernandez  <aldyh@redhat.com>
+
+	PR testsuite/52011
+	* gcc.dg/lto/trans-mem.h: New file.
+	* gcc.dg/lto/trans-mem-2_0.c: Include it.
+	* gcc.dg/lto/trans-mem-1_1.c: Same.
+	* gcc.dg/lto/trans-mem-4_1.c: Same.
+	* gcc.dg/lto/trans-mem-3_1.c: Same.
+
 2012-01-27  Tobias Burnus  <burnus@net-b.de>
 
 	PR fortran/52022
diff --git a/gcc/testsuite/gcc.dg/lto/trans-mem-1_1.c b/gcc/testsuite/gcc.dg/lto/trans-mem-1_1.c
index 6dba2527cd8..f49a2626e58 100644
--- a/gcc/testsuite/gcc.dg/lto/trans-mem-1_1.c
+++ b/gcc/testsuite/gcc.dg/lto/trans-mem-1_1.c
@@ -1,10 +1 @@
-#include <stdint.h>
-
-#define noinline __attribute__((noinline,noclone,used))
-
-noinline uint32_t _ITM_beginTransaction(uint32_t a, ...) { asm(""); }
-noinline void _ITM_commitTransaction (void) { asm(""); }
-noinline void _ITM_WU4 (void *a, uint32_t b) { asm(""); }
-noinline void _ITM_WU8 (void *a, uint64_t b) { asm(""); }
-noinline void _ITM_registerTMCloneTable (void) { asm(""); }
-noinline void _ITM_deregisterTMCloneTable (void) { asm(""); }
+#include "trans-mem.h"
diff --git a/gcc/testsuite/gcc.dg/lto/trans-mem-2_0.c b/gcc/testsuite/gcc.dg/lto/trans-mem-2_0.c
index b99c5bf95e9..b2706022875 100644
--- a/gcc/testsuite/gcc.dg/lto/trans-mem-2_0.c
+++ b/gcc/testsuite/gcc.dg/lto/trans-mem-2_0.c
@@ -2,19 +2,10 @@
 /* { dg-lto-do link } */
 /* { dg-require-effective-target stdint_types } */
 
-#include <stdint.h>
+#include "trans-mem.h"
 
 extern void foobar() __attribute__((transaction_callable));
 
-#define noinline __attribute__((noinline,noclone,used))
-
-noinline uint32_t _ITM_beginTransaction(uint32_t a, ...) { asm(""); }
-noinline void _ITM_commitTransaction (void) { asm(""); }
-noinline void _ITM_WU4 (void *a, uint32_t b) { asm(""); }
-noinline void _ITM_WU8 (void *a, uint64_t b) { asm(""); }
-noinline void _ITM_registerTMCloneTable (void) { asm(""); }
-noinline void _ITM_deregisterTMCloneTable (void) { asm(""); }
-
 main()
 {
   __transaction_relaxed
diff --git a/gcc/testsuite/gcc.dg/lto/trans-mem-3_1.c b/gcc/testsuite/gcc.dg/lto/trans-mem-3_1.c
index 6373ecc12ac..4b7f7d7510b 100644
--- a/gcc/testsuite/gcc.dg/lto/trans-mem-3_1.c
+++ b/gcc/testsuite/gcc.dg/lto/trans-mem-3_1.c
@@ -1,6 +1,6 @@
 /* { dg-options "-fgnu-tm" } */
 
-#include <stdint.h>
+#include "trans-mem.h"
 
 extern int i;
 
@@ -8,12 +8,3 @@ main()
 {
   __transaction_atomic { i = 0; }
 }
-
-#define noinline __attribute__((noinline,noclone,used))
-
-noinline uint32_t _ITM_beginTransaction(uint32_t a, ...) { asm(""); }
-noinline void _ITM_commitTransaction (void) { asm(""); }
-noinline void _ITM_WU4 (void *a, uint32_t b) { asm(""); }
-noinline void _ITM_WU8 (void *a, uint64_t b) { asm(""); }
-noinline void _ITM_registerTMCloneTable (void) { asm(""); }
-noinline void _ITM_deregisterTMCloneTable (void) { asm(""); }
diff --git a/gcc/testsuite/gcc.dg/lto/trans-mem-4_1.c b/gcc/testsuite/gcc.dg/lto/trans-mem-4_1.c
index a377e666605..620ce16b8c8 100644
--- a/gcc/testsuite/gcc.dg/lto/trans-mem-4_1.c
+++ b/gcc/testsuite/gcc.dg/lto/trans-mem-4_1.c
@@ -1,14 +1,6 @@
-#include <stdint.h>
+#include "trans-mem.h"
 
 __attribute__((transaction_safe))
 void foo() 
 {
 }
-
-uint32_t _ITM_beginTransaction(uint32_t prop, ...)
-{
-}
-
-void __builtin__ITM_commitTransaction (void)
-{
-}
diff --git a/gcc/testsuite/gcc.dg/lto/trans-mem.h b/gcc/testsuite/gcc.dg/lto/trans-mem.h
new file mode 100644
index 00000000000..add5a297b51
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/lto/trans-mem.h
@@ -0,0 +1,22 @@
+#include <stdint.h>
+
+/* Dummy declarations for common TM supporting functions.  */
+
+/* These must be in sync with both libitm/libitm.h and the TM builtin
+   definitions in gcc/gtm-builtins.def.  */
+
+#define noinline __attribute__((noinline,noclone,used))
+
+#ifdef __i386__
+/* Only for 32-bit x86.  */
+# define ITM_REGPARM	__attribute__((regparm(2)))
+#else
+# define ITM_REGPARM
+#endif
+
+ITM_REGPARM noinline uint32_t _ITM_beginTransaction(uint32_t a, ...) { asm(""); }
+ITM_REGPARM noinline void _ITM_commitTransaction (void) { asm(""); }
+ITM_REGPARM noinline void _ITM_WU4 (void *a, uint32_t b) { asm(""); }
+ITM_REGPARM noinline void _ITM_WU8 (void *a, uint64_t b) { asm(""); }
+noinline void _ITM_registerTMCloneTable (void) { asm(""); }
+noinline void _ITM_deregisterTMCloneTable (void) { asm(""); }