MCJIT support for non-function sections.

Move to a by-section allocation and relocation scheme. This allows
better support for sections which do not contain externally visible
symbols.

Flesh out the relocation address vs. local storage address separation a
bit more as well. Remote process JITs use this to tell the relocation
resolution code where the code will live when it executes.

The startFunctionBody/endFunctionBody interfaces to the JIT and the
memory manager are deprecated. They'll stick around for as long as the
old JIT does, but the MCJIT doesn't use them anymore.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@148258 91177308-0d34-0410-b5e6-96231b3b80d8

lib/ExecutionEngine/MCJIT/MCJITMemoryManager.h

@@ -31,6 +31,16 @@ public:
   // We own the JMM, so make sure to delete it.
   ~MCJITMemoryManager() { delete JMM; }
 
+  uint8_t *allocateDataSection(uintptr_t Size, unsigned Alignment,
+                               unsigned SectionID) {
+    return JMM->allocateDataSection(Size, Alignment, SectionID);
+  }
+
+  uint8_t *allocateCodeSection(uintptr_t Size, unsigned Alignment,
+                               unsigned SectionID) {
+    return JMM->allocateCodeSection(Size, Alignment, SectionID);
+  }
+
   // Allocate ActualSize bytes, or more, for the named function. Return
   // a pointer to the allocated memory and update Size to reflect how much
   // memory was acutally allocated.