make these tests pass when run on a G5.

llvm-svn: 65117
diff --git a/llvm/test/CodeGen/X86/vshift_split2.ll b/llvm/test/CodeGen/X86/vshift_split2.ll
index 356e0fd1..e943849 100644
--- a/llvm/test/CodeGen/X86/vshift_split2.ll
+++ b/llvm/test/CodeGen/X86/vshift_split2.ll
@@ -1,4 +1,4 @@
-; RUN: llvm-as < %s | llc
+; RUN: llvm-as < %s | llc -march=x86 -mcpu=yonah
 
 ; Legalization example that requires splitting a large vector into smaller pieces.