Get builtins tests ready for linker plugin.

	* gcc.c-torture/execute/builtins/memcpy-chk.c (s2,s3,l1): Mark volatile.
	* gcc.c-torture/execute/builtins/memops-asm-lib.c (my_memcpy, my_bcopy, my_memset,
	my_bzero): Mark used.
	* gcc.c-torture/execute/builtins/memset-chk.c (l1, l3): Mark volatile.
	* gcc.c-torture/execute/builtins/memmove-chk.c (s1,s2,s3,l1): Mark volatile.
	* gcc.c-torture/execute/builtins/mempcpy-chk.c (s2,s3,l1): Mark volatile

From-SVN: r168588

gcc/testsuite/ChangeLog

 2011-01-07  Jan Hubicka  <jh@suse.cz>
 
+	Get builtins tests ready for linker plugin.
+	* gcc.c-torture/execute/builtins/memcpy-chk.c (s2,s3,l1): Mark volatile.
+	* gcc.c-torture/execute/builtins/memops-asm-lib.c (my_memcpy, my_bcopy, my_memset,
+	my_bzero): Mark used.
+	* gcc.c-torture/execute/builtins/memset-chk.c (l1, l3): Mark volatile.
+	* gcc.c-torture/execute/builtins/memmove-chk.c (s1,s2,s3,l1): Mark volatile.
+	* gcc.c-torture/execute/builtins/mempcpy-chk.c (s2,s3,l1): Mark volatile
+
+2011-01-07  Jan Hubicka  <jh@suse.cz>
+
 	PR tree-optimization/46367
 	* g++.dg/torture/pr46367.C: New file.
 

gcc/testsuite/gcc.c-torture/execute/builtins/memcpy-chk.c

@@ -12,9 +12,9 @@ extern int memcmp (const void *, const void *, size_t);
 
 const char s1[] = "123";
 char p[32] = "";
-char *s2 = "defg";
-char *s3 = "FGH";
-size_t l1 = 1;
+volatile char *s2 = "defg"; /* prevent constant propagation to happen when whole program assumptions are made.  */
+volatile char *s3 = "FGH"; /* prevent constant propagation to happen when whole program assumptions are made.  */
+volatile size_t l1 = 1; /* prevent constant propagation to happen when whole program assumptions are made.  */
 
 void
 __attribute__((noinline))

gcc/testsuite/gcc.c-torture/execute/builtins/memmove-chk.c

@@ -11,11 +11,11 @@ extern int memcmp (const void *, const void *, size_t);
 
 #include "chk.h"
 
-const char s1[] = "123";
+const char s1[] = "123"; 
 char p[32] = "";
-char *s2 = "defg";
-char *s3 = "FGH";
-size_t l1 = 1;
+volatile char *s2 = "defg"; /* prevent constant propagation to happen when whole program assumptions are made.  */
+volatile char *s3 = "FGH"; /* prevent constant propagation to happen when whole program assumptions are made.  */
+volatile size_t l1 = 1; /* prevent constant propagation to happen when whole program assumptions are made.  */
 
 void
 __attribute__((noinline))

gcc/testsuite/gcc.c-torture/execute/builtins/memops-asm-lib.c

@@ -4,6 +4,9 @@ typedef __SIZE_TYPE__ size_t;
 
 #define TEST_ABORT if (inside_main) abort()
 
+/* LTO code is at the present to able to track that asm alias my_bcopy on builtin
+   actually refers to this function.  See PR47181. */
+__attribute__ ((used))
 void *
 my_memcpy (void *d, const void *s, size_t n)
 {
@@ -14,6 +17,9 @@ my_memcpy (void *d, const void *s, size_t n)
   return (char *) d;
 }
 
+/* LTO code is at the present to able to track that asm alias my_bcopy on builtin
+   actually refers to this function.  See PR47181. */
+__attribute__ ((used))
 void
 my_bcopy (const void *s, void *d, size_t n)
 {
@@ -31,6 +37,9 @@ my_bcopy (const void *s, void *d, size_t n)
     }
 }
 
+/* LTO code is at the present to able to track that asm alias my_bcopy on builtin
+   actually refers to this function.  See PR47181. */
+__attribute__ ((used))
 void *
 my_memset (void *d, int c, size_t n)
 {
@@ -40,6 +49,9 @@ my_memset (void *d, int c, size_t n)
   return (char *) d;
 }
 
+/* LTO code is at the present to able to track that asm alias my_bcopy on builtin
+   actually refers to this function.  See PR47181. */
+__attribute__ ((used))
 void
 my_bzero (void *d, size_t n)
 {

gcc/testsuite/gcc.c-torture/execute/builtins/mempcpy-chk.c

@@ -13,9 +13,9 @@ extern int memcmp (const void *, const void *, size_t);
 
 const char s1[] = "123";
 char p[32] = "";
-char *s2 = "defg";
-char *s3 = "FGH";
-size_t l1 = 1;
+volatile char *s2 = "defg"; /* prevent constant propagation to happen when whole program assumptions are made.  */
+volatile char *s3 = "FGH"; /* prevent constant propagation to happen when whole program assumptions are made.  */
+volatile size_t l1 = 1; /* prevent constant propagation to happen when whole program assumptions are made.  */
 
 void
 __attribute__((noinline))

gcc/testsuite/gcc.c-torture/execute/builtins/memset-chk.c

@@ -13,8 +13,8 @@ extern int memcmp (const void *, const void *, size_t);
 
 char buffer[32];
 int argc = 1;
-size_t l1 = 1;
-char *s3 = "FGH";
+volatile size_t l1 = 1;  /* prevent constant propagation to happen when whole program assumptions are made.  */
+volatile char *s3 = "FGH"; /* prevent constant propagation to happen when whole program assumptions are made.  */
 char *s4;
 
 void