X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=include%2Fllvm%2FModuleProvider.h;h=8a0a20c0ef6681ae286c33039b73b4159ed7634d;hb=95df6b3603e228cea714be21997fec82cb03011e;hp=2f185e01d353732b909c9614bed901f482ab1f93;hpb=9769ab22265b313171d201b5928688524a01bd87;p=oota-llvm.git

diff --git a/include/llvm/ModuleProvider.h b/include/llvm/ModuleProvider.h
index 2f185e01d35..8a0a20c0ef6 100644
--- a/include/llvm/ModuleProvider.h
+++ b/include/llvm/ModuleProvider.h
@@ -2,8 +2,8 @@
 //
 //                     The LLVM Compiler Infrastructure
 //
-// This file was developed by the LLVM research group and is distributed under
-// the University of Illinois Open Source License. See LICENSE.TXT for details.
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 //
@@ -18,6 +18,8 @@
 #ifndef MODULEPROVIDER_H
 #define MODULEPROVIDER_H
 
+#include <string>
+
 namespace llvm {
 
 class Function;
@@ -35,22 +37,31 @@ public:
   ///
   Module* getModule() { return TheModule; }
 
-  /// materializeFunction - make sure the given function is fully read.  Note
-  /// that this can throw an exception if the module is corrupt!
+  /// materializeFunction - make sure the given function is fully read.  If the
+  /// module is corrupt, this returns true and fills in the optional string
+  /// with information about the problem.  If successful, this returns false.
   ///
-  virtual void materializeFunction(Function *F) = 0;
+  virtual bool materializeFunction(Function *F, std::string *ErrInfo = 0) = 0;
 
+  /// dematerializeFunction - If the given function is read in, and if the
+  /// module provider supports it, release the memory for the function, and set
+  /// it up to be materialized lazily.  If the provider doesn't support this
+  /// capability, this method is a noop.
+  ///
+  virtual void dematerializeFunction(Function *) {}
+  
   /// materializeModule - make sure the entire Module has been completely read.
-  /// Note that this can throw an exception if the module is corrupt!
+  /// On error, return null and fill in the error string if specified.
   ///
-  virtual Module* materializeModule() = 0;
+  virtual Module* materializeModule(std::string *ErrInfo = 0) = 0;
 
   /// releaseModule - no longer delete the Module* when provider is destroyed.
-  /// Note that this can throw an exception if the module is corrupt!
+  /// On error, return null and fill in the error string if specified.
   ///
-  virtual Module* releaseModule() {
+  virtual Module* releaseModule(std::string *ErrInfo = 0) {
     // Since we're losing control of this Module, we must hand it back complete
-    materializeModule();
+    if (!materializeModule(ErrInfo))
+      return 0;
     Module *tempM = TheModule;
     TheModule = 0;
     return tempM;
@@ -63,11 +74,13 @@ public:
 /// if we just have a Module.  Note that the ModuleProvider takes ownership of
 /// the Module specified.
 struct ExistingModuleProvider : public ModuleProvider {
-  ExistingModuleProvider(Module *M) {
+  explicit ExistingModuleProvider(Module *M) {
     TheModule = M;
   }
-  void materializeFunction(Function *F) {}
-  Module* materializeModule() { return TheModule; }
+  bool materializeFunction(Function *, std::string * = 0) {
+    return false;
+  }
+  Module* materializeModule(std::string * = 0) { return TheModule; }
 };
 
 } // End llvm namespace