X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=lib%2FIR%2FTypeFinder.cpp;h=689b90389130ba1ab457efd13310d5a0fe99e9f3;hb=f822dab3dd51c97bbc2acc7789c298947d142685;hp=dd933026ea7386976aebc1da6bd88889327d5948;hpb=1e3037f0be430ef2339838bbdede11f45658bd82;p=oota-llvm.git

diff --git a/lib/IR/TypeFinder.cpp b/lib/IR/TypeFinder.cpp
index dd933026ea7..689b9038913 100644
--- a/lib/IR/TypeFinder.cpp
+++ b/lib/IR/TypeFinder.cpp
@@ -94,19 +94,27 @@ void TypeFinder::clear() {
 /// incorporateType - This method adds the type to the list of used structures
 /// if it's not in there already.
 void TypeFinder::incorporateType(Type *Ty) {
-  // Check to see if we're already visited this type.
+  // Check to see if we've already visited this type.
   if (!VisitedTypes.insert(Ty).second)
     return;
 
-  // If this is a structure or opaque type, add a name for the type.
-  if (StructType *STy = dyn_cast<StructType>(Ty))
-    if (!OnlyNamed || STy->hasName())
-      StructTypes.push_back(STy);
-
-  // Recursively walk all contained types.
-  for (Type::subtype_iterator I = Ty->subtype_begin(),
-         E = Ty->subtype_end(); I != E; ++I)
-    incorporateType(*I);
+  SmallVector<Type *, 4> TypeWorklist;
+  TypeWorklist.push_back(Ty);
+  do {
+    Ty = TypeWorklist.pop_back_val();
+
+    // If this is a structure or opaque type, add a name for the type.
+    if (StructType *STy = dyn_cast<StructType>(Ty))
+      if (!OnlyNamed || STy->hasName())
+        StructTypes.push_back(STy);
+
+    // Add all unvisited subtypes to worklist for processing
+    for (Type::subtype_reverse_iterator I = Ty->subtype_rbegin(),
+                                        E = Ty->subtype_rend();
+         I != E; ++I)
+      if (VisitedTypes.insert(*I).second)
+        TypeWorklist.push_back(*I);
+  } while (!TypeWorklist.empty());
 }
 
 /// incorporateValue - This method is used to walk operand lists finding types