[PATCH] Add Cortex-A15 tuning to gcc.dg/uninit-pred-8_a.c

[Kyrill Tkachov]

Hi all,

As discussed in the PR it's better to pin down the tuning for arm targets on 
this test so that the BRANCH_COST remains constant.
This makes the test more stable across toolchains configured for different 
default CPUs.

Ok to apply?

Thanks,
Kyrill

2017-01-12  Kyrylo Tkachov  <kyrylo.tkac...@arm.com>

    PR tree-optimization/78319
    * gcc.dg/uninit-pred-8_a.c: Add -mtune=cortex-a15 for arm.
    Remove xfail.

diff --git a/gcc/testsuite/gcc.dg/uninit-pred-8_a.c b/gcc/testsuite/gcc.dg/uninit-pred-8_a.c
index c45fba0..c4cdf48 100644
--- a/gcc/testsuite/gcc.dg/uninit-pred-8_a.c
+++ b/gcc/testsuite/gcc.dg/uninit-pred-8_a.c
@@ -1,6 +1,8 @@
 
 /* { dg-do compile } */
 /* { dg-options "-Wuninitialized -O2" } */
+/* Pick a particular tuning to pin down BRANCH_COST.  */
+/* { dg-additional-options "-mtune=cortex-a15" { target arm*-*-* } } */
 
 int g;
 void bar();
@@ -16,9 +18,8 @@ int foo (int n, int l, int m, int r)
   if (m) g++;
   else   bar();
 
-  /* marking this test as xfail on arm-none-eabi, see PR78319.  */
   if ( n ||  m || r || l)
-      blah(v); /* { dg-bogus "uninitialized" "bogus warning" { xfail arm-none-eabi } } */
+      blah(v); /* { dg-bogus "uninitialized" "bogus warning" } */
 
   if ( n )
       blah(v); /* { dg-bogus "uninitialized" "bogus warning" } */