[PATCH][ARM][testsuite] Add testsuite options for AArch32 NEON

[Kyrylo Tkachov]

Hi all,

Since the new AArch32 NEON instructions in arm_neon.h are predicated on
__ARM_ARCH 8 the testsuite add_options procedure should also include
-march=armv8-a to make these instructions available.

This makes the new vrnd* tests in gcc.target/arm/neon PASS in situations
where armv8-a is not the default target.
No regressions otherwise on arm-none-eabi.

Ok for trunk?

Thanks,
Kyrill

gcc/testsuite/ChangeLog

2012-12-11  Kyrylo Tkachov  <kyrylo.tkac...@arm.com>

        * lib/target-supports.exp (add_options_for_arm_v8_neon):
        Add -march=armv8-a.
diff --git a/gcc/testsuite/lib/target-supports.exp 
b/gcc/testsuite/lib/target-supports.exp
index ef93ad1..493a38a 100644
--- a/gcc/testsuite/lib/target-supports.exp
+++ b/gcc/testsuite/lib/target-supports.exp
@@ -2186,7 +2186,7 @@ proc add_options_for_arm_v8_neon { flags } {
     if { ! [check_effective_target_arm_v8_neon_ok] } {
         return "$flags"
     }
-    return "$flags -mfpu=neon-fp-armv8 -mfloat-abi=softfp"
+    return "$flags -march=armv8-a -mfpu=neon-fp-armv8 -mfloat-abi=softfp"
 }
 
 # Add the options needed for NEON.  We need either -mfloat-abi=softfp