[weak vtables] Remove a bunch of weak vtables

This patch removes most of the trivial cases of weak vtables by pinning them to
a single object file. The memory leaks in this version have been fixed. Thanks
Alexey for pointing them out.

Differential Revision: http://llvm-reviews.chandlerc.com/D2068

Reviewed by Andy

llvm-svn: 195064

4 files changed, 11 insertions, 0 deletions

diff --git a/llvm/lib/CodeGen/MachineRegisterInfo.cpp b/llvm/lib/CodeGen/MachineRegisterInfo.cpp
index ce7d567cc29..f8b8796b25f 100644
--- a/llvm/lib/CodeGen/MachineRegisterInfo.cpp
+++ b/llvm/lib/CodeGen/MachineRegisterInfo.cpp
@@ -19,6 +19,9 @@
 
 using namespace llvm;
 
+// Pin the vtable to this file.
+void MachineRegisterInfo::Delegate::anchor() {}
+
 MachineRegisterInfo::MachineRegisterInfo(const TargetMachine &TM)
   : TM(TM), TheDelegate(0), IsSSA(true), TracksLiveness(true) {
   VRegInfo.reserve(256);
diff --git a/llvm/lib/CodeGen/MachineScheduler.cpp b/llvm/lib/CodeGen/MachineScheduler.cpp
index 3144dfe4d39..e71c4df0b79 100644
--- a/llvm/lib/CodeGen/MachineScheduler.cpp
+++ b/llvm/lib/CodeGen/MachineScheduler.cpp
@@ -72,6 +72,10 @@ static cl::opt<bool> VerifyScheduling("verify-misched", cl::Hidden,
 // DAG subtrees must have at least this many nodes.
 static const unsigned MinSubtreeSize = 8;
 
+// Pin the vtables to this file.
+void MachineSchedStrategy::anchor() {}
+void ScheduleDAGMutation::anchor() {}
+
 //===----------------------------------------------------------------------===//
 // Machine Instruction Scheduling Pass and Registry
 //===----------------------------------------------------------------------===//
diff --git a/llvm/lib/CodeGen/RegAllocBase.cpp b/llvm/lib/CodeGen/RegAllocBase.cpp
index b94ce4d33f7..293e306a291 100644
--- a/llvm/lib/CodeGen/RegAllocBase.cpp
+++ b/llvm/lib/CodeGen/RegAllocBase.cpp
@@ -50,6 +50,9 @@ bool RegAllocBase::VerifyEnabled = false;
 //                         RegAllocBase Implementation
 //===----------------------------------------------------------------------===//
 
+// Pin the vtable to this file.
+void RegAllocBase::anchor() {}
+
 void RegAllocBase::init(VirtRegMap &vrm,
                         LiveIntervals &lis,
                         LiveRegMatrix &mat) {
diff --git a/llvm/lib/CodeGen/RegAllocBase.h b/llvm/lib/CodeGen/RegAllocBase.h
index 9c0029837d0..c17a8d96ef6 100644
--- a/llvm/lib/CodeGen/RegAllocBase.h
+++ b/llvm/lib/CodeGen/RegAllocBase.h
@@ -57,6 +57,7 @@ class Spiller;
 /// live range splitting. They must also override enqueue/dequeue to provide an
 /// assignment order.
 class RegAllocBase {
+  virtual void anchor();
 protected:
   const TargetRegisterInfo *TRI;
   MachineRegisterInfo *MRI;