From d46575f1908b1fb9950e610a1f36733893ad44b1 Mon Sep 17 00:00:00 2001
From: Bill Wendling <isanbard@gmail.com>
Date: Sat, 21 Apr 2012 23:59:16 +0000
Subject: [PATCH] Add a flag to the struct type finder to collect only those
 types which have names. This saves collecting types we normally don't care
 about.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@155300 91177308-0d34-0410-b5e6-96231b3b80d8
---
 include/llvm/Module.h      |  3 ++-
 lib/Linker/LinkModules.cpp |  4 ++--
 lib/VMCore/Module.cpp      | 13 ++++++++-----
 3 files changed, 12 insertions(+), 8 deletions(-)

diff --git a/include/llvm/Module.h b/include/llvm/Module.h
index b9c98814f15..570b1bc7b45 100644
--- a/include/llvm/Module.h
+++ b/include/llvm/Module.h
@@ -303,7 +303,8 @@ public:
 
   /// findUsedStructTypes - Walk the entire module and find all of the
   /// struct types that are in use, returning them in a vector.
-  void findUsedStructTypes(std::vector<StructType*> &StructTypes) const;
+  void findUsedStructTypes(std::vector<StructType*> &StructTypes,
+                           bool OnlyNamed = false) const;
   
   /// getTypeByName - Return the type with the specified name, or null if there
   /// is none by that name.
diff --git a/lib/Linker/LinkModules.cpp b/lib/Linker/LinkModules.cpp
index 765fcc88235..630289b2bdc 100644
--- a/lib/Linker/LinkModules.cpp
+++ b/lib/Linker/LinkModules.cpp
@@ -595,12 +595,12 @@ void ModuleLinker::computeTypeMapping() {
   // example.  When the source module got loaded into the same LLVMContext, if
   // it had the same type, it would have been renamed to "%foo.42 = { i32 }".
   std::vector<StructType*> SrcStructTypes;
-  SrcM->findUsedStructTypes(SrcStructTypes);
+  SrcM->findUsedStructTypes(SrcStructTypes, true);
   SmallPtrSet<StructType*, 32> SrcStructTypesSet(SrcStructTypes.begin(),
                                                  SrcStructTypes.end());
 
   std::vector<StructType*> DstStructTypes;
-  DstM->findUsedStructTypes(DstStructTypes);
+  DstM->findUsedStructTypes(DstStructTypes, true);
   SmallPtrSet<StructType*, 32> DstStructTypesSet(DstStructTypes.begin(),
                                                  DstStructTypes.end());
 
diff --git a/lib/VMCore/Module.cpp b/lib/VMCore/Module.cpp
index 3c67191e09c..24c2707b543 100644
--- a/lib/VMCore/Module.cpp
+++ b/lib/VMCore/Module.cpp
@@ -483,9 +483,10 @@ namespace {
     DenseSet<Type*> VisitedTypes;
     
     std::vector<StructType*> &StructTypes;
+    bool OnlyNamed;
   public:
-    TypeFinder(std::vector<StructType*> &structTypes)
-      : StructTypes(structTypes) {}
+    TypeFinder(std::vector<StructType*> &structTypes, bool onlyNamed)
+      : StructTypes(structTypes), OnlyNamed(onlyNamed) {}
     
     void run(const Module &M) {
       // Get types from global variables.
@@ -545,7 +546,8 @@ namespace {
       
       // If this is a structure or opaque type, add a name for the type.
       if (StructType *STy = dyn_cast<StructType>(Ty))
-        StructTypes.push_back(STy);
+        if (!OnlyNamed || STy->hasName())
+          StructTypes.push_back(STy);
       
       // Recursively walk all contained types.
       for (Type::subtype_iterator I = Ty->subtype_begin(),
@@ -590,6 +592,7 @@ namespace {
   };
 } // end anonymous namespace
 
-void Module::findUsedStructTypes(std::vector<StructType*> &StructTypes) const {
-  TypeFinder(StructTypes).run(*this);
+void Module::findUsedStructTypes(std::vector<StructType*> &StructTypes,
+                                 bool OnlyNamed) const {
+  TypeFinder(StructTypes, OnlyNamed).run(*this);
 }
-- 
2.34.1