Add DAG optimisation for FP16_TO_FP

[oota-llvm.git] / lib / Support / CrashRecoveryContext.cpp

diff --git a/lib/Support/CrashRecoveryContext.cpp b/lib/Support/CrashRecoveryContext.cpp
index b9829e1192a13f2f276b10c717c4c4b0064f8ab4..352b519f9b4051450e13da738497f375ef2cbf6f 100644 (file)
--- a/lib/Support/CrashRecoveryContext.cpp
+++ b/lib/Support/CrashRecoveryContext.cpp
@@ -24,6 +24,10 @@ static ManagedStatic<
     sys::ThreadLocal<const CrashRecoveryContextImpl> > CurrentContext;
 
 struct CrashRecoveryContextImpl {
+  // When threads are disabled, this links up all active
+  // CrashRecoveryContextImpls.  When threads are enabled there's one thread
+  // per CrashRecoveryContext and CurrentContext is a thread-local, so only one
+  // CrashRecoveryContextImpl is active per thread and this is always null.
   const CrashRecoveryContextImpl *Next;
 
   CrashRecoveryContext *CRC;