Add __USER_LABEL_PREFIX__ to the asm names for targets that need it.

2018-08-16  Iain Sandoe <iain@sandoe.co.uk>

gcc/testsuite

        * gcc.dg/memcmp-1.c (lib_memcmp): Apply __USER_LABEL_PREFIX__.
        (lib_strncmp): Likewise.

From-SVN: r263586

gcc/testsuite/ChangeLog

 2018-08-16  Iain Sandoe <iain@sandoe.co.uk>
 
+	* gcc.dg/memcmp-1.c (lib_memcmp): Apply __USER_LABEL_PREFIX__.
+	(lib_strncmp): Likewise.
+
+2018-08-16  Iain Sandoe <iain@sandoe.co.uk>
+
 	* c-c++-common/asan/pointer-subtract-3.c: Skip for Darwin.
 	* c-c++-common/asan/pointer-subtract-4.c: Likewise.
 	* g++.dg/torture/pr44295.C : Likewise.

gcc/testsuite/gcc.dg/memcmp-1.c

@@ -8,8 +8,13 @@
 #include <string.h>
 #include <stdint.h>
 
-int lib_memcmp(const void *a, const void *b, size_t n) asm("memcmp");
-int lib_strncmp(const char *a, const char *b, size_t n) asm("strncmp");
+#define STR1(X) #X
+#define STR2(X) STR1(X)
+
+int lib_memcmp(const void *a, const void *b, size_t n)
+ asm(STR2(__USER_LABEL_PREFIX__) "memcmp");
+int lib_strncmp(const char *a, const char *b, size_t n)
+ asm(STR2(__USER_LABEL_PREFIX__) "strncmp");
 
 #ifndef NRAND
 #ifdef TEST_ALL