1 files changed, 67 insertions, 0 deletions
diff --git a/lib/CodeGen/CGCXXTemp.cpp b/lib/CodeGen/CGCXXTemp.cpp
new file mode 100644
index 000000000000..d53a56fa2251
--- /dev/null
+++ b/lib/CodeGen/CGCXXTemp.cpp
@@ -0,0 +1,67 @@
+//===--- CGCXXTemp.cpp - Emit LLVM Code for C++ temporaries ---------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This contains code dealing with C++ code generation of temporaries
+//
+//===----------------------------------------------------------------------===//
+
+#include "CodeGenFunction.h"
+using namespace clang;
+using namespace CodeGen;
+
+void CodeGenFunction::PushCXXTemporary(const CXXTemporary *Temporary, 
+                                       llvm::Value *Ptr) {
+  llvm::BasicBlock *DtorBlock = createBasicBlock("temp.dtor");
+    
+  LiveTemporaries.push_back(CXXLiveTemporaryInfo(Temporary, Ptr, DtorBlock, 0));
+}
+
+void CodeGenFunction::PopCXXTemporary() {
+  const CXXLiveTemporaryInfo& Info = LiveTemporaries.back();
+  
+  CleanupBlockInfo CleanupInfo = PopCleanupBlock();
+  assert(CleanupInfo.CleanupBlock == Info.DtorBlock && 
+         "Cleanup block mismatch!");
+  assert(!CleanupInfo.SwitchBlock && 
+         "Should not have a switch block for temporary cleanup!");
+  assert(!CleanupInfo.EndBlock && 
+         "Should not have an end block for temporary cleanup!");
+  
+  EmitBlock(Info.DtorBlock);
+
+  EmitCXXDestructorCall(Info.Temporary->getDestructor(),
+                        Dtor_Complete, Info.ThisPtr);
+
+  LiveTemporaries.pop_back();
+}
+
+RValue
+CodeGenFunction::EmitCXXExprWithTemporaries(const CXXExprWithTemporaries *E,
+                                            llvm::Value *AggLoc,
+                                            bool isAggLocVolatile) {
+  // Keep track of the current cleanup stack depth.
+  size_t CleanupStackDepth = CleanupEntries.size();
+
+  unsigned OldNumLiveTemporaries = LiveTemporaries.size();
+  
+  RValue RV = EmitAnyExpr(E->getSubExpr(), AggLoc, isAggLocVolatile);
+  
+  // Go through the temporaries backwards.
+  for (unsigned i = E->getNumTemporaries(); i != 0; --i) {
+    assert(LiveTemporaries.back().Temporary == E->getTemporary(i - 1));
+    LiveTemporaries.pop_back();
+  }
+
+  assert(OldNumLiveTemporaries == LiveTemporaries.size() &&
+         "Live temporary stack mismatch!");
+  
+  EmitCleanupBlocks(CleanupStackDepth);
+
+  return RV;
+}