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[PATCH, rs6000] whitespace fix for p9-dimode tests


Hi, 

I am seeing some failures in the p9-dimode tests. This appears to
be due to the scan-assembler strings matching comment portions of the
generated assembly, versus the actual generated assembly. In
particular, the dg-final directive  { scan-assembler-not "ld"}
is matching the "ld" as seen in the string
  # 19 "/home/willschm/gcc/gcc-mainline-vec_fold/..."

This is resolved by adding a leading whitespace regex string "\[ \t\]"
as seen in other tests.

OK for trunk?
Thanks,
-Will

2016-12-08  Will Schmidt <will_schmidt@vnet.ibm.com>

gcc/testsuite/
	* gcc.target/powerpc/dimode-1.c: Update syntax on scan-assembler
	strings
	* gcc.target/powerpc/dimode-2.c: Likewise.


diff --git a/gcc/testsuite/gcc.target/powerpc/p9-dimode1.c b/gcc/testsuite/gcc.target/powerpc/p9-dimode1.c
index 6ba610b..c29b69d 100644
--- a/gcc/testsuite/gcc.target/powerpc/p9-dimode1.c
+++ b/gcc/testsuite/gcc.target/powerpc/p9-dimode1.c
@@ -43,8 +43,8 @@ p9_minus_1 (void)
   return ret;
 }
 
-/* { dg-final { scan-assembler     "xxspltib" } } */
-/* { dg-final { scan-assembler-not "mtvsrd"   } } */
-/* { dg-final { scan-assembler-not "lfd"      } } */
-/* { dg-final { scan-assembler-not "ld"       } } */
-/* { dg-final { scan-assembler-not "lxsd"     } } */
+/* { dg-final { scan-assembler     "\[ \t\]xxspltib" } } */
+/* { dg-final { scan-assembler-not "\[ \t\]mtvsrd"   } } */
+/* { dg-final { scan-assembler-not "\[ \t\]lfd"  } } */
+/* { dg-final { scan-assembler-not "\[ \t\]ld"   } } */
+/* { dg-final { scan-assembler-not "\[ \t\]lxsd" } } */
diff --git a/gcc/testsuite/gcc.target/powerpc/p9-dimode2.c b/gcc/testsuite/gcc.target/powerpc/p9-dimode2.c
index 0567a65..f33d18c 100644
--- a/gcc/testsuite/gcc.target/powerpc/p9-dimode2.c
+++ b/gcc/testsuite/gcc.target/powerpc/p9-dimode2.c
@@ -21,7 +21,7 @@ p9_large (void)
   return ret;
 }
 
-/* { dg-final { scan-assembler     "mtvsrd"   } } */
-/* { dg-final { scan-assembler-not "ld"       } } */
-/* { dg-final { scan-assembler-not "lfd"      } } */
-/* { dg-final { scan-assembler-not "lxsd"     } } */
+/* { dg-final { scan-assembler     "\[ \t\]mtvsrd" } } */
+/* { dg-final { scan-assembler-not "\[ \t\]ld"     } } */
+/* { dg-final { scan-assembler-not "\[ \t\]lfd"    } } */
+/* { dg-final { scan-assembler-not "\[ \t\]lxsd"   } } */



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