[GCC][PATCH]{AArch64][Testsuite] Fix failing vector_initialization_nostack.c

[Tamar Christina]

Hi all,

This fixes (PR78142) by only creating one vector in the char case.
r241590 is causing more registers to be used and so
the SP registered happens to be picked and used.

This test I believe was checking explicitly that the
SP is not used if not needed. By creating a single vector then less
registers are needed so SP won't be used.

Ran regression tests on aarch64-none-linux-gnu.

Ok for trunk?

Thanks,
Tamar

gcc/testsuite/

2017-01-26  Tamar Christina  <tamar.christ...@arm.com>

        PR middle-end/78142
        * gcc.target/aarch64/vector_initialization_nostack.c
        (f12): Use one vector.
diff --git a/gcc/testsuite/gcc.target/aarch64/vector_initialization_nostack.c b/gcc/testsuite/gcc.target/aarch64/vector_initialization_nostack.c
index bbad04d00263b6a91b826b4911af92bdd226c821..bf43f1cd72ec4e636dbd45534c9ab348bee8febc 100644
--- a/gcc/testsuite/gcc.target/aarch64/vector_initialization_nostack.c
+++ b/gcc/testsuite/gcc.target/aarch64/vector_initialization_nostack.c
@@ -38,14 +38,14 @@ f11 (void)
   return sum;
 }
 
-char arr_c[100][100];
+char arr_c[100];
 char
 f12 (void)
 {
   int i;
   char sum = 0;
   for (i = 0; i < 100; i++)
-    sum += arr_c[i][0] * arr_c[0][i];
+    sum += arr_c[i] * arr_c[i];
   return sum;
 }