From be1ffc6b8d3db7b1a9d512a1d53afd075d8e58c9 Mon Sep 17 00:00:00 2001
From: Devang Patel <dpatel@apple.com>
Date: Wed, 17 Jan 2007 20:30:17 +0000
Subject: [PATCH] Update assignPassManager() signature to allow selection of
 preferred pass manager type. This allows new FPPassManager to select Call
 Graph Pass Manager (if available) as its parent.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33306 91177308-0d34-0410-b5e6-96231b3b80d8
---
 include/llvm/Pass.h        | 38 ++++++++++++++++++++++----------------
 lib/VMCore/PassManager.cpp | 17 +++++++++++++----
 2 files changed, 35 insertions(+), 20 deletions(-)

diff --git a/include/llvm/Pass.h b/include/llvm/Pass.h
index 9951a988bf0..7708d498f63 100644
--- a/include/llvm/Pass.h
+++ b/include/llvm/Pass.h
@@ -57,6 +57,20 @@ class PMDataManager;
 // AnalysisID - Use the PassInfo to identify a pass...
 typedef const PassInfo* AnalysisID;
 
+/// Different types of internal pass managers. External pass managers
+/// (PassManager and FunctionPassManager) are not represented here.
+/// Ordering of pass manager types is important here.
+enum PassManagerType {
+  PMT_Unknown = 0,
+  PMT_ModulePassManager = 1, /// MPPassManager 
+  PMT_CallGraphPassManager,  /// CGPassManager
+  PMT_FunctionPassManager,   /// FPPassManager
+  PMT_LoopPassManager,       /// LPPassManager
+  PMT_BasicBlockPassManager  /// BBPassManager
+};
+
+typedef enum PassManagerType PassManagerType;
+
 //===----------------------------------------------------------------------===//
 /// Pass interface - Implemented by all 'passes'.  Subclass this if you are an
 /// interprocedural optimization or you do not fit into any of the more
@@ -107,7 +121,8 @@ public:
   void print(std::ostream *O, const Module *M) const { if (O) print(*O, M); }
   void dump() const; // dump - call print(std::cerr, 0);
 
-  virtual void assignPassManager(PMStack &PMS) {}
+  virtual void assignPassManager(PMStack &PMS, 
+				 PassManagerType T = PMT_Unknown) {}
   // Access AnalysisResolver
   inline void setResolver(AnalysisResolver *AR) { Resolver = AR; }
   inline AnalysisResolver *getResolver() { return Resolver; }
@@ -200,7 +215,8 @@ public:
   virtual bool runPass(Module &M) { return runOnModule(M); }
   virtual bool runPass(BasicBlock&) { return false; }
 
-  virtual void assignPassManager(PMStack &PMS);
+  virtual void assignPassManager(PMStack &PMS, 
+				 PassManagerType T = PMT_ModulePassManager);
   // Force out-of-line virtual method.
   virtual ~ModulePass();
 };
@@ -266,7 +282,8 @@ public:
   ///
   bool run(Function &F);
 
-  virtual void assignPassManager(PMStack &PMS);
+  virtual void assignPassManager(PMStack &PMS, 
+				 PassManagerType T = PMT_FunctionPassManager);
 };
 
 
@@ -320,19 +337,8 @@ public:
   virtual bool runPass(Module &M) { return false; }
   virtual bool runPass(BasicBlock &BB);
 
-  virtual void assignPassManager(PMStack &PMS);
-};
-
-/// Different types of internal pass managers. External pass managers
-/// (PassManager and FunctionPassManager) are not represented here.
-/// Ordering of pass manager types is important here.
-enum PassManagerType {
-  PMT_Unknown = 0,
-  PMT_ModulePassManager = 1, /// MPPassManager 
-  PMT_CallGraphPassManager,  /// CGPassManager
-  PMT_FunctionPassManager,   /// FPPassManager
-  PMT_LoopPassManager,       /// LPPassManager
-  PMT_BasicBlockPassManager  /// BBPassManager
+  virtual void assignPassManager(PMStack &PMS, 
+				 PassManagerType T = PMT_BasicBlockPassManager);
 };
 
 /// PMStack
diff --git a/lib/VMCore/PassManager.cpp b/lib/VMCore/PassManager.cpp
index 6f0c4527be3..476dad7215d 100644
--- a/lib/VMCore/PassManager.cpp
+++ b/lib/VMCore/PassManager.cpp
@@ -1202,7 +1202,8 @@ void PMStack::handleLastUserOverflow() {
 
 /// Find appropriate Module Pass Manager in the PM Stack and
 /// add self into that manager. 
-void ModulePass::assignPassManager(PMStack &PMS) {
+void ModulePass::assignPassManager(PMStack &PMS, 
+				   PassManagerType PreferredType) {
 
   // Find Module Pass Manager
   while(!PMS.empty()) {
@@ -1219,7 +1220,8 @@ void ModulePass::assignPassManager(PMStack &PMS) {
 
 /// Find appropriate Function Pass Manager or Call Graph Pass Manager
 /// in the PM Stack and add self into that manager. 
-void FunctionPass::assignPassManager(PMStack &PMS) {
+void FunctionPass::assignPassManager(PMStack &PMS,
+				     PassManagerType PreferredType) {
 
   // Find Module Pass Manager (TODO : Or Call Graph Pass Manager)
   while(!PMS.empty()) {
@@ -1245,7 +1247,13 @@ void FunctionPass::assignPassManager(PMStack &PMS) {
     // [3] Assign manager to manage this new manager. This may create
     // and push new managers into PMS
     Pass *P = dynamic_cast<Pass *>(FPP);
-    P->assignPassManager(PMS);
+
+    // If Call Graph Pass Manager is active then use it to manage
+    // this new Function Pass manager.
+    if (PMD->getPassManagerType() == PMT_CallGraphPassManager)
+      P->assignPassManager(PMS, PMT_CallGraphPassManager);
+    else
+      P->assignPassManager(PMS);
 
     // [4] Push new manager into PMS
     PMS.push(FPP);
@@ -1257,7 +1265,8 @@ void FunctionPass::assignPassManager(PMStack &PMS) {
 
 /// Find appropriate Basic Pass Manager or Call Graph Pass Manager
 /// in the PM Stack and add self into that manager. 
-void BasicBlockPass::assignPassManager(PMStack &PMS) {
+void BasicBlockPass::assignPassManager(PMStack &PMS,
+				       PassManagerType PreferredType) {
 
   BBPassManager *BBP = NULL;