Fix machine-cp by having it to check sub-register indicies. e.g.
ecx = mov eax
al  = mov ch
The second copy is not a nop because the sub-indices of ecx,ch is not the
same of that of eax/al.

Re-enabled machine-cp.
PR11940


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@151002 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/CodeGen/X86/machine-cp.ll b/test/CodeGen/X86/machine-cp.ll
index 772d2d0..54fa01c 100644
--- a/test/CodeGen/X86/machine-cp.ll
+++ b/test/CodeGen/X86/machine-cp.ll
@@ -1,4 +1,4 @@
-; RUN: llc -mtriple=x86_64-apple-macosx -mcpu=nocona < %s -disable-copyprop=false | FileCheck %s
+; RUN: llc -mtriple=x86_64-apple-macosx -mcpu=nocona < %s | FileCheck %s
 
 ; After tail duplication, two copies in an early exit BB can be cancelled out.
 ; rdar://10640363