Clean up exit status and globals procecessing in llvm2ice.

src/IceConverter.h

Index: src/IceConverter.h
diff --git a/src/IceConverter.h b/src/IceConverter.h
index dc18e7a09838e9b6feca9cf0ba8dee1bb4c35b2e..30d3b6041c4d8e859d6fa2e0351b4c5b135273d1 100644
--- a/src/IceConverter.h
+++ b/src/IceConverter.h
@@ -25,11 +25,15 @@ namespace Ice {
 class Converter : public Translator {
 public:
   Converter(GlobalContext *Ctx, Ice::ClFlags &Flags) : Translator(Ctx, Flags) {}
-  /// Converts the LLVM Module to ICE. Returns exit status 0 if successful,
-  /// Nonzero otherwise.
-  int convertToIce(llvm::Module *Mod);
+  /// Converts the LLVM Module to ICE. Sets exit status to false if successful,
+  /// true otherwise.
+  void convertToIce(llvm::Module *Mod);
 
 private:
+  // Converts globals to ICE, and then machine code.
+  void convertGlobals(llvm::Module *Mod);
+  // Converts functions to ICE, and then machine code.
+  void convertFunctions(llvm::Module *Mod);
   Converter(const Converter &) LLVM_DELETED_FUNCTION;
   Converter &operator=(const Converter &) LLVM_DELETED_FUNCTION;
 };