Add instruction itinerary for the PPC64 A2 core.

This adds a full itinerary for IBM's PPC64 A2 embedded core. These
cores form the basis for the CPUs in the new IBM BG/Q supercomputer.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153842 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/PowerPC/PPCSubtarget.cpp b/lib/Target/PowerPC/PPCSubtarget.cpp
index c89fab3..fa54a44 100644
--- a/lib/Target/PowerPC/PPCSubtarget.cpp
+++ b/lib/Target/PowerPC/PPCSubtarget.cpp
@@ -146,7 +146,7 @@
            CodeGenOpt::Level OptLevel,
            TargetSubtargetInfo::AntiDepBreakMode& Mode,
            RegClassVector& CriticalPathRCs) const {
-  if (DarwinDirective == PPC::DIR_440)
+  if (DarwinDirective == PPC::DIR_440 || DarwinDirective == PPC::DIR_A2)
     return false;
 
   Mode = TargetSubtargetInfo::ANTIDEP_CRITICAL;