Align function starts to target-specific bundle alignment.

src/IceTargetLoweringX8632.h

Index: src/IceTargetLoweringX8632.h
diff --git a/src/IceTargetLoweringX8632.h b/src/IceTargetLoweringX8632.h
index 499790e5e90bc2ea9489fe3cb9134762db924edd..1767e9cd0639aa624c7d99152300797c3139e653 100644
--- a/src/IceTargetLoweringX8632.h
+++ b/src/IceTargetLoweringX8632.h
@@ -45,6 +45,7 @@ public:
     // i8, and i16 are rounded up to 4 bytes.
     return (typeWidthInBytes(Ty) + 3) & ~3;
   }
+  virtual SizeT getBundleP2Align() const { return 5; }
   virtual void emitVariable(const Variable *Var, const Cfg *Func) const;
   virtual void lowerArguments();
   virtual void addProlog(CfgNode *Node);