[Darwin, PPC, testsuite] Fix pr71785 testcase for Darwin.

Firstly, we adjust the test conditions to use non-PIC code for Darwin.
Secondly, we have to account for out-of-line GPR restores which gives
a false positive on one of the scan-assembler-not.  Lastly, we make the
test a bit more specific for Darwin - that it looks for absence of
branches to local labels.

2019-06-23  Iain Sandoe  <iain@sandoe.co.uk>

	* gcc.target/powerpc/pr71785.c: For Darwin, make test non-PIC,
	expect the out-of-line GPR restore, and test specifically for
	absence of branches to local labels.

From-SVN: r272601

gcc/testsuite/ChangeLog

+2019-06-23  Iain Sandoe  <iain@sandoe.co.uk>
+
+	* gcc.target/powerpc/pr71785.c: For Darwin, make test non-PIC,
+	expect the out-of-line GPR restore, and test specifically for
+	absence of branches to local labels.
+
 2019-06-22  Jerry DeLisle  <jvdelisle@gcc.gnu.org>
 
 	PR fortran/89782

gcc/testsuite/gcc.target/powerpc/pr71785.c

 /* { dg-do compile { target { powerpc*-*-* } } } */
 /* { dg-options "-O2" } */
-/* { dg-final { scan-assembler-not {\mb\M} } } */
+/* We have to lose the default pic codegen on Darwin.  */
+/* { dg-additional-options "-mdynamic-no-pic" { target powerpc*-*-darwin* } } */
+/* ... and account for the out-of-line GPR restore.  */
+/* { dg-final { scan-assembler-times {\mb[ \t]*restGPR} 1 { target powerpc*-*-darwin* } } } */
+/* { dg-final { scan-assembler-not {\mb[ \t]L} { target powerpc*-*-darwin* } } } */
+/* { dg-final { scan-assembler-not {\mb\M} { target { ! powerpc*-*-darwin* } } } } */
 
 /* Check that all computed gotos in this testcase end up unfactored completely.
    If some is not there will be a unconditional jump left; if all works fine,