Darwin, x86, testsuite - Disable tests that cannot pass.

A few of the i386.exp target tests cannot pass on Darwin
because either the port doesn't support a feature, or the
ABI demands sufficiently different codegen that matching
the output with scan-asms would require a different test.

Disabling those tests here.

2019-05-24  Iain Sandoe  <iain@sandoe.co.uk>

	* gcc.target/i386/falign-functions-2.c: Skip for Darwin.
	* gcc.target/i386/pr70738-7.c: Likewise.
	* gcc.target/i386/pr24414.c: Likewise.

From-SVN: r271589

gcc/testsuite/ChangeLog

+2019-05-24  Iain Sandoe  <iain@sandoe.co.uk>
+
+	* gcc.target/i386/falign-functions-2.c: Skip for Darwin.
+	* gcc.target/i386/pr70738-7.c: Likewise.
+	* gcc.target/i386/pr24414.c: Likewise.
+
 2019-05-23  Iain Sandoe  <iain@sandoe.co.uk>
 
-       * lib/target-supports.exp (check_effective_target_mfentry): New.
-       * gcc.target/i386/fentry-override.c: Require effective target mfentry.
-       * gcc/testsuite/gcc.target/i386/fentry.c: Likewise
-       * gcc.target/i386/fentryname1.c: Likewise
-       * gcc.target/i386/fentryname2.c: Likewise
-       * gcc.target/i386/fentryname3.c: Likewise
-       * gcc.target/i386/nop-mcount.c: Likewise
-       * gcc.target/i386/pr82699-2.c: Likewise
-       * gcc.target/i386/pr82699-4.c: Likewise
-       * gcc.target/i386/pr82699-5.c: Likewise
-       * gcc.target/i386/pr82699-6.c: Likewise
-       * gcc.target/i386/returninst1.c: Likewise
-       * gcc.target/i386/returninst2.c: Likewise
-       * gcc.target/i386/returninst3.c : Likewise
+	* lib/target-supports.exp (check_effective_target_mfentry): New.
+	* gcc.target/i386/fentry-override.c: Require effective target mfentry.
+	* gcc/testsuite/gcc.target/i386/fentry.c: Likewise
+	* gcc.target/i386/fentryname1.c: Likewise
+	* gcc.target/i386/fentryname2.c: Likewise
+	* gcc.target/i386/fentryname3.c: Likewise
+	* gcc.target/i386/nop-mcount.c: Likewise
+	* gcc.target/i386/pr82699-2.c: Likewise
+	* gcc.target/i386/pr82699-4.c: Likewise
+	* gcc.target/i386/pr82699-5.c: Likewise
+	* gcc.target/i386/pr82699-6.c: Likewise
+	* gcc.target/i386/returninst1.c: Likewise
+	* gcc.target/i386/returninst2.c: Likewise
+	* gcc.target/i386/returninst3.c : Likewise
 
 2019-05-23  Bill Schmidt  <wschmidt@linux.ibm.com>
 

gcc/testsuite/gcc.target/i386/falign-functions-2.c

 /* { dg-do compile } */
 /* { dg-options "-O2 -falign-functions=64:8" } */
+/* { dg-skip-if "SUBALIGN_LOG not set for Darwin" { *-*-darwin* } } */
 
 void
 a (void)

gcc/testsuite/gcc.target/i386/pr24414.c

 /* { dg-do run } */
 /* { dg-options "-O2" } */
+/* { dg-skip-if "asm insert mismatches ABI for Darwin" { *-*-darwin* } } */
 int test;
 
 int

gcc/testsuite/gcc.target/i386/pr70738-7.c

-/* { dg-do compile { target ia32 } } */
+/* { dg-do compile { target { ia32 && { ! *-*-darwin* } } } } */
 /* { dg-options "-msse2 -mgeneral-regs-only" } */
 
 extern float a, b, c;