darwin, testsuite - fix PR58321

Darwin doesn't emit a .file directive by default
and one of the scan-asm hits for ELF targets comes from
this directive. Adjust for Darwin and explain.

2019-05-20  Iain Sandoe  <iain@sandoe.co.uk>

	PR testsuite/58321
	* gcc.target/i386/memcpy-strategy-3.c: Adjust count for Darwin and
	add a comment as to the reason for the difference.
	* gcc.target/i386/memset-strategy-1.c: Likewise.

From-SVN: r271415

gcc/testsuite/ChangeLog

+2019-05-20  Iain Sandoe  <iain@sandoe.co.uk>
+
+	PR testsuite/58321
+	* gcc.target/i386/memcpy-strategy-3.c: Adjust count for Darwin and
+	add a comment as to the reason for the difference.
+	* gcc.target/i386/memset-strategy-1.c: Likewise.
+
 2019-05-20  Jonathan Wakely  <jwakely@redhat.com>
 
 	PR c++/90532 Ensure __is_constructible(T[]) is false

gcc/testsuite/gcc.target/i386/memcpy-strategy-3.c

 /* { dg-do compile } */
 /* { dg-options "-O2 -march=atom -mmemcpy-strategy=vector_loop:2000:align,libcall:-1:align" } */
-/* { dg-final { scan-assembler-times "memcpy" 2  } } */
+/* On ELF platforms, one hit comes from the .file directive.  */
+/* { dg-final { scan-assembler-times "memcpy" 2 { target { ! *-*-darwin* } } } } */
+/* But not on Darwin, which doesn't have a .file directive by default.  */
+/* { dg-final { scan-assembler-times "_memcpy" 1  { target *-*-darwin* } } } */
 
 char a[2048];
 char b[2048];

gcc/testsuite/gcc.target/i386/memset-strategy-1.c

 /* { dg-do compile } */
 /* { dg-options "-O2 -march=atom -mmemset-strategy=libcall:-1:align" } */
-/* { dg-final { scan-assembler-times "memset" 2  } } */
+/* On ELF platforms, one hit comes from the .file directive.  */
+/* { dg-final { scan-assembler-times "memset" 2 { target { ! *-*-darwin* } } } } */
+/* But not on Darwin, which doesn't have a .file directive by default.  */
+/* { dg-final { scan-assembler-times "_memset" 1 { target *-*-darwin* } } } */
 
 char a[2048];
 void t (void)
 {
   __builtin_memset (a, 1, 2048);
 }
-