Provide guards for this shared structure. I'm not sure this actually needs

to be shared, but how/where to privatize it is not immediately clear to me.

If any SelectionDAG experts see a better solution, please share!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@74180 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/CodeGen/SelectionDAG/SelectionDAG.cpp b/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
index aa79089194c25f4d2bfed5bac43ca781f3829a40..8de2dfccf790b51a63b316bbabc2c7fe50b4c29f 100644 (file)
--- a/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
+++ b/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
@@ -31,8 +31,10 @@
 #include "llvm/Target/TargetInstrInfo.h"
 #include "llvm/Target/TargetMachine.h"
 #include "llvm/Support/CommandLine.h"
+#include "llvm/Support/ManagedStatic.h"
 #include "llvm/Support/MathExtras.h"
 #include "llvm/Support/raw_ostream.h"
+#include "llvm/System/Mutex.h"
 #include "llvm/ADT/SetVector.h"
 #include "llvm/ADT/SmallPtrSet.h"
 #include "llvm/ADT/SmallSet.h"
@@ -4977,14 +4979,17 @@ void SDNode::Profile(FoldingSetNodeID &ID) const {
   AddNodeIDNode(ID, this);
 }
 
+static ManagedStatic<std::set<MVT, MVT::compareRawBits> > EVTs;
+static MVT VTs[MVT::LAST_VALUETYPE];
+static ManagedStatic<sys::SmartMutex<true> > VTMutex;
+
 /// getValueTypeList - Return a pointer to the specified value type.
 ///
 const MVT *SDNode::getValueTypeList(MVT VT) {
+  sys::SmartScopedLock<true> Lock(&*VTMutex);
   if (VT.isExtended()) {
-    static std::set<MVT, MVT::compareRawBits> EVTs;
-    return &(*EVTs.insert(VT).first);
+    return &(*EVTs->insert(VT).first);
   } else {
-    static MVT VTs[MVT::LAST_VALUETYPE];
     VTs[VT.getSimpleVT()] = VT;
     return &VTs[VT.getSimpleVT()];
   }