Fix race condition in jump table list creation

src/IceGlobalContext.cpp

Index: src/IceGlobalContext.cpp
diff --git a/src/IceGlobalContext.cpp b/src/IceGlobalContext.cpp
index fbdcd1bcc4e13f24bf5eaeaa4490f0d5754ed02a..94a5343fef8b9d965bb453d474bf654beb98b627 100644
--- a/src/IceGlobalContext.cpp
+++ b/src/IceGlobalContext.cpp
@@ -895,10 +895,11 @@ JumpTableDataList GlobalContext::getJumpTables() {
   return JumpTables;
 }
 
-JumpTableData &GlobalContext::addJumpTable(IceString FuncName, SizeT Id,
-                                           SizeT NumTargets) {
+JumpTableData &
+GlobalContext::addJumpTable(IceString FuncName, SizeT Id,
+                            const JumpTableData::TargetList &TargetList) {
   auto JumpTableList = getJumpTableList();
-  JumpTableList->emplace_back(FuncName, Id, NumTargets);
+  JumpTableList->emplace_back(FuncName, Id, TargetList);
   return JumpTableList->back();
 }