Iasm and obj lowering for advanced switch lowering.

src/IceAssemblerX8664.h

Index: src/IceAssemblerX8664.h
diff --git a/src/IceAssemblerX8664.h b/src/IceAssemblerX8664.h
index f2ffd7f4ee48ede97d9421f2dc5e5894788022e7..2f750c692fc4eef68007e4cf5f5b5afecfce8ade 100644
--- a/src/IceAssemblerX8664.h
+++ b/src/IceAssemblerX8664.h
@@ -38,8 +38,9 @@ public:
   void alignFunction() override;
   void padWithNop(intptr_t Padding) override;
   SizeT getBundleAlignLog2Bytes() const override;
-  const char *getNonExecPadDirective() const override;
+  const char *getAlignDirective() const override;
   llvm::ArrayRef<uint8_t> getNonExecBundlePadding() const override;
+  Label *getOrCreateCfgNodeLabel(SizeT NodeNumber) override;
   void bindCfgNodeLabel(SizeT NodeNumber) override;
   bool fixupIsPCRel(FixupKind Kind) const override;