Change the JIT to compile eagerly by default as agreed in
http://llvm.org/PR5184, and beef up the comments to describe what both options
do and the risks of lazy compilation in the presence of threads.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85295 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/ExecutionEngine/JIT/JIT.cpp b/lib/ExecutionEngine/JIT/JIT.cpp
index 6b1464e..e21d760 100644
--- a/lib/ExecutionEngine/JIT/JIT.cpp
+++ b/lib/ExecutionEngine/JIT/JIT.cpp
@@ -599,7 +599,7 @@
   isAlreadyCodeGenerating = false;
 
   // If the function referred to another function that had not yet been
-  // read from bitcode, but we are jitting non-lazily, emit it now.
+  // read from bitcode, and we are jitting non-lazily, emit it now.
   while (!jitstate->getPendingFunctions(locked).empty()) {
     Function *PF = jitstate->getPendingFunctions(locked).back();
     jitstate->getPendingFunctions(locked).pop_back();
@@ -616,7 +616,7 @@
   
   // If the JIT is configured to emit info so that dlsym can be used to
   // rewrite stubs to external globals, do so now.
-  if (areDlsymStubsEnabled() && isLazyCompilationDisabled())
+  if (areDlsymStubsEnabled() && !isCompilingLazily())
     updateDlsymStubTable();
 }