Re-apply r196639: Add support for archives and object file caching under MCJIT.

I believe the bot failures on linux systems were due to overestimating the
alignment of object-files within archives, which are only guaranteed to be
two-byte aligned. I have reduced the alignment in
RuntimeDyldELF::createObjectImageFromFile accordingly.

llvm-svn: 198737

1 files changed, 7 insertions, 0 deletions

diff --git a/llvm/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldImpl.h b/llvm/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldImpl.h
index 634f6cebe1c..56970aebef4 100644
--- a/llvm/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldImpl.h
+++ b/llvm/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldImpl.h
@@ -311,12 +311,18 @@ protected:
   virtual void updateGOTEntries(StringRef Name, uint64_t Addr) {}
 
   virtual ObjectImage *createObjectImage(ObjectBuffer *InputBuffer);
+  virtual ObjectImage *createObjectImageFromFile(object::ObjectFile *InputObject);
+
+  // This is the implementation for the two public overloads
+  ObjectImage *loadObject(ObjectImage *InputObject);
+
 public:
   RuntimeDyldImpl(RTDyldMemoryManager *mm) : MemMgr(mm), HasError(false) {}
 
   virtual ~RuntimeDyldImpl();
 
   ObjectImage *loadObject(ObjectBuffer *InputBuffer);
+  ObjectImage *loadObject(object::ObjectFile *InputObject);
 
   void *getSymbolAddress(StringRef Name) {
     // FIXME: Just look up as a function for now. Overly simple of course.
@@ -354,6 +360,7 @@ public:
   StringRef getErrorString() { return ErrorStr; }
 
   virtual bool isCompatibleFormat(const ObjectBuffer *Buffer) const = 0;
+  virtual bool isCompatibleFile(const ObjectFile *Obj) const = 0;
 
   virtual void registerEHFrames();