From e89f1c4ee74349fbe08a2c1f8060a7d3b049b5ab Mon Sep 17 00:00:00 2001
From: David Greene <greened@obbligato.org>
Date: Mon, 10 May 2010 20:24:27 +0000
Subject: [PATCH] Fix PR6875:

This includes a patch by Roman Divacky to fix the initial crash.

Move the actual addition of passes from *PassManager::add to
*PassManager::addImpl.  That way, when adding printer passes we won't
recurse infinitely.

Finally, check to make sure that we are actually adding a FunctionPass
to a FunctionPassManager before doing a print before or after it.
Immutable passes are strange in this way because they aren't
FunctionPasses yet they can be and are added to the FunctionPassManager.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103425 91177308-0d34-0410-b5e6-96231b3b80d8
---
 include/llvm/PassManager.h       |  7 +++++
 lib/VMCore/PassManager.cpp       | 46 +++++++++++++++++++++-----------
 test/Other/2010-05-60-Printer.ll |  6 +++++
 3 files changed, 44 insertions(+), 15 deletions(-)
 create mode 100644 test/Other/2010-05-60-Printer.ll

diff --git a/include/llvm/PassManager.h b/include/llvm/PassManager.h
index 4d9116311a0..8de0f8342d7 100644
--- a/include/llvm/PassManager.h
+++ b/include/llvm/PassManager.h
@@ -60,6 +60,9 @@ public:
   bool run(Module &M);
 
 private:
+  /// addImpl - Add a pass to the queue of passes to run, without
+  /// checking whether to add a printer pass.
+  void addImpl(Pass *P);
 
   /// PassManagerImpl_New is the actual class. PassManager is just the 
   /// wraper to publish simple pass manager interface
@@ -96,6 +99,10 @@ public:
   bool doFinalization();
   
 private:
+  /// addImpl - Add a pass to the queue of passes to run, without
+  /// checking whether to add a printer pass.
+  void addImpl(Pass *P);
+
   FunctionPassManagerImpl *FPM;
   Module *M;
 };
diff --git a/lib/VMCore/PassManager.cpp b/lib/VMCore/PassManager.cpp
index b28fdebd523..a56938c1592 100644
--- a/lib/VMCore/PassManager.cpp
+++ b/lib/VMCore/PassManager.cpp
@@ -275,7 +275,7 @@ public:
       addImmutablePass(IP);
       recordAvailableAnalysis(IP);
     } else {
-      P->assignPassManager(activeStack);
+      P->assignPassManager(activeStack, PMT_FunctionPassManager);
     }
 
   }
@@ -418,7 +418,7 @@ public:
       addImmutablePass(IP);
       recordAvailableAnalysis(IP);
     } else {
-      P->assignPassManager(activeStack);
+      P->assignPassManager(activeStack, PMT_ModulePassManager);
     }
   }
 
@@ -1270,20 +1270,30 @@ FunctionPassManager::~FunctionPassManager() {
   delete FPM;
 }
 
+/// addImpl - Add a pass to the queue of passes to run, without
+/// checking whether to add a printer pass.
+void FunctionPassManager::addImpl(Pass *P) {
+  FPM->add(P);
+}
+
 /// add - Add a pass to the queue of passes to run.  This passes
 /// ownership of the Pass to the PassManager.  When the
 /// PassManager_X is destroyed, the pass will be destroyed as well, so
 /// there is no need to delete the pass. (TODO delete passes.)
 /// This implies that all passes MUST be allocated with 'new'.
 void FunctionPassManager::add(Pass *P) { 
-  if (ShouldPrintBeforePass(P))
-    add(P->createPrinterPass(dbgs(), std::string("*** IR Dump Before ")
-                             + P->getPassName() + " ***"));
-  FPM->add(P);
+  // If this is a not a function pass, don't add a printer for it.
+  if (P->getPassKind() == PT_Function)
+    if (ShouldPrintBeforePass(P))
+      addImpl(P->createPrinterPass(dbgs(), std::string("*** IR Dump Before ")
+                                   + P->getPassName() + " ***"));
 
-  if (ShouldPrintAfterPass(P))
-    add(P->createPrinterPass(dbgs(), std::string("*** IR Dump After ")
-                             + P->getPassName() + " ***"));
+  addImpl(P);
+
+  if (P->getPassKind() == PT_Function)
+    if (ShouldPrintAfterPass(P))
+      addImpl(P->createPrinterPass(dbgs(), std::string("*** IR Dump After ")
+                                   + P->getPassName() + " ***"));
 }
 
 /// run - Execute all of the passes scheduled for execution.  Keep
@@ -1588,20 +1598,26 @@ PassManager::~PassManager() {
   delete PM;
 }
 
+/// addImpl - Add a pass to the queue of passes to run, without
+/// checking whether to add a printer pass.
+void PassManager::addImpl(Pass *P) {
+  PM->add(P);
+}
+
 /// add - Add a pass to the queue of passes to run.  This passes ownership of
 /// the Pass to the PassManager.  When the PassManager is destroyed, the pass
 /// will be destroyed as well, so there is no need to delete the pass.  This
 /// implies that all passes MUST be allocated with 'new'.
 void PassManager::add(Pass *P) {
   if (ShouldPrintBeforePass(P))
-    add(P->createPrinterPass(dbgs(), std::string("*** IR Dump Before ")
-                             + P->getPassName() + " ***"));
+    addImpl(P->createPrinterPass(dbgs(), std::string("*** IR Dump Before ")
+                                 + P->getPassName() + " ***"));
 
-  PM->add(P);
+  addImpl(P);
 
   if (ShouldPrintAfterPass(P))
-    add(P->createPrinterPass(dbgs(), std::string("*** IR Dump After ")
-                             + P->getPassName() + " ***"));
+    addImpl(P->createPrinterPass(dbgs(), std::string("*** IR Dump After ")
+                                 + P->getPassName() + " ***"));
 }
 
 /// run - Execute all of the passes scheduled for execution.  Keep track of
@@ -1764,7 +1780,7 @@ void BasicBlockPass::assignPassManager(PMStack &PMS,
 
     // [3] Assign manager to manage this new manager. This may create
     // and push new managers into PMS
-    BBP->assignPassManager(PMS);
+    BBP->assignPassManager(PMS, PreferredType);
 
     // [4] Push new manager into PMS
     PMS.push(BBP);
diff --git a/test/Other/2010-05-60-Printer.ll b/test/Other/2010-05-60-Printer.ll
new file mode 100644
index 00000000000..9ead740a51f
--- /dev/null
+++ b/test/Other/2010-05-60-Printer.ll
@@ -0,0 +1,6 @@
+; RUN: llc -O2 -print-after-all < %s 2>@1
+
+define void @tester(){
+  ret void
+}
+