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..db30f4959bef50d2026c89b7341075ea73ded2d5 100644
--- a/src/IceTargetLoweringX8632.h
+++ b/src/IceTargetLoweringX8632.h
@@ -45,6 +45,8 @@ public:
     // i8, and i16 are rounded up to 4 bytes.
     return (typeWidthInBytes(Ty) + 3) & ~3;
   }
+  virtual SizeT getBundleAlignLog2Bytes() const { return 5; }
+  virtual IceString getNonExecBundlePadding() const { return "0xF4"; }
   virtual void emitVariable(const Variable *Var, const Cfg *Func) const;
   virtual void lowerArguments();
   virtual void addProlog(CfgNode *Node);