Make it possible to create multiple JIT instances at the same time, by removing
the global TheJIT and TheJITResolver variables.  Lazy compilation is supported
by a global map from a stub address to the JITResolver that knows how to
compile it.

Patch by Olivier Meurant!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@95837 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/ExecutionEngine/JIT/JIT.h b/lib/ExecutionEngine/JIT/JIT.h
index bb8f851..edae719 100644
--- a/lib/ExecutionEngine/JIT/JIT.h
+++ b/lib/ExecutionEngine/JIT/JIT.h
@@ -61,6 +61,10 @@
   /// should be set to true.  Doing so breaks freeMachineCodeForFunction.
   bool AllocateGVsWithCode;
 
+  /// True while the JIT is generating code.  Used to assert against recursive
+  /// entry.
+  bool isAlreadyCodeGenerating;
+
   JITState *jitstate;
 
   JIT(Module *M, TargetMachine &tm, TargetJITInfo &tji,