From 9c18f51daaf89b9c706aa0557bede2cbb0debb69 Mon Sep 17 00:00:00 2001
From: Bill Wendling <isanbard@gmail.com>
Date: Sat, 1 Oct 2011 09:19:10 +0000
Subject: [PATCH] Add ARMConstantPoolMBB to hold an MBB value in the constant
 pool.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@140942 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Target/ARM/ARMConstantPoolValue.cpp | 57 +++++++++++++++++++++++++
 lib/Target/ARM/ARMConstantPoolValue.h   | 34 ++++++++++++++-
 2 files changed, 90 insertions(+), 1 deletion(-)

diff --git a/lib/Target/ARM/ARMConstantPoolValue.cpp b/lib/Target/ARM/ARMConstantPoolValue.cpp
index 9224c039bd8..cdb747631dd 100644
--- a/lib/Target/ARM/ARMConstantPoolValue.cpp
+++ b/lib/Target/ARM/ARMConstantPoolValue.cpp
@@ -299,3 +299,60 @@ void ARMConstantPoolSymbol::print(raw_ostream &O) const {
   O << S;
   ARMConstantPoolValue::print(O);
 }
+
+//===----------------------------------------------------------------------===//
+// ARMConstantPoolMBB
+//===----------------------------------------------------------------------===//
+
+ARMConstantPoolMBB::ARMConstantPoolMBB(LLVMContext &C, MachineBasicBlock *mbb,
+                                       unsigned id, unsigned char PCAdj,
+                                       ARMCP::ARMCPModifier Modifier,
+                                       bool AddCurrentAddress)
+  : ARMConstantPoolValue(C, mbb, id, ARMCP::CPMachineBasicBlock, PCAdj,
+                         Modifier, AddCurrentAddress),
+    MBB(mbb) {}
+
+ARMConstantPoolMBB *ARMConstantPoolMBB::Create(LLVMContext &C,
+                                               MachineBasicBlock *mbb,
+                                               unsigned ID,
+                                               unsigned char PCAdj) {
+  return new ARMConstantPoolMBB(C, mbb, ID, PCAdj, ARMCP::no_modifier, false);
+}
+
+int ARMConstantPoolMBB::getExistingMachineCPValue(MachineConstantPool *CP,
+                                                  unsigned Alignment) {
+  unsigned AlignMask = Alignment - 1;
+  const std::vector<MachineConstantPoolEntry> Constants = CP->getConstants();
+  for (unsigned i = 0, e = Constants.size(); i != e; ++i) {
+    if (Constants[i].isMachineConstantPoolEntry() &&
+        (Constants[i].getAlignment() & AlignMask) == 0) {
+      ARMConstantPoolValue *CPV =
+        (ARMConstantPoolValue *)Constants[i].Val.MachineCPVal;
+      ARMConstantPoolMBB *APMBB = dyn_cast<ARMConstantPoolMBB>(CPV);
+      if (!APMBB) continue;
+
+      if (APMBB->getLabelId() == this->getLabelId() &&
+          APMBB->getPCAdjustment() == this->getPCAdjustment() &&
+          APMBB->getMBB() == this->getMBB() &&
+          APMBB->getModifier() == this->getModifier())
+        return i;
+    }
+  }
+
+  return -1;
+}
+
+bool ARMConstantPoolMBB::hasSameValue(ARMConstantPoolValue *ACPV) {
+  const ARMConstantPoolMBB *ACPMBB = dyn_cast<ARMConstantPoolMBB>(ACPV);
+  return ACPMBB && ACPMBB->MBB == MBB &&
+    ARMConstantPoolValue::hasSameValue(ACPV);
+}
+
+void ARMConstantPoolMBB::addSelectionDAGCSEId(FoldingSetNodeID &ID) {
+  ID.AddPointer(MBB);
+  ARMConstantPoolValue::addSelectionDAGCSEId(ID);
+}
+
+void ARMConstantPoolMBB::print(raw_ostream &O) const {
+  ARMConstantPoolValue::print(O);
+}
diff --git a/lib/Target/ARM/ARMConstantPoolValue.h b/lib/Target/ARM/ARMConstantPoolValue.h
index 4548d256710..6b69cb6caa5 100644
--- a/lib/Target/ARM/ARMConstantPoolValue.h
+++ b/lib/Target/ARM/ARMConstantPoolValue.h
@@ -88,7 +88,7 @@ public:
   bool isExtSymbol() const { return Kind == ARMCP::CPExtSymbol; }
   bool isBlockAddress() const { return Kind == ARMCP::CPBlockAddress; }
   bool isLSDA() const { return Kind == ARMCP::CPLSDA; }
-  bool isMachineBasicBlock() { return Kind == ARMCP::CPMachineBasicBlock; }
+  bool isMachineBasicBlock() const{ return Kind == ARMCP::CPMachineBasicBlock; }
 
   virtual unsigned getRelocationInfo() const { return 2; }
 
@@ -197,6 +197,38 @@ public:
   static bool classof(const ARMConstantPoolSymbol *) { return true; }
 };
 
+/// ARMConstantPoolMBB - ARM-specific constantpool value of a machine basic
+/// block.
+class ARMConstantPoolMBB : public ARMConstantPoolValue {
+  MachineBasicBlock *MBB;       // Machine basic block.
+
+  ARMConstantPoolMBB(LLVMContext &C, MachineBasicBlock *mbb, unsigned id,
+                     unsigned char PCAdj, ARMCP::ARMCPModifier Modifier,
+                     bool AddCurrentAddress);
+
+public:
+  static ARMConstantPoolMBB *Create(LLVMContext &C, MachineBasicBlock *mbb,
+                                    unsigned ID, unsigned char PCAdj);
+
+  const MachineBasicBlock *getMBB() const { return MBB; }
+
+  virtual int getExistingMachineCPValue(MachineConstantPool *CP,
+                                        unsigned Alignment);
+
+  virtual void addSelectionDAGCSEId(FoldingSetNodeID &ID);
+
+  /// hasSameValue - Return true if this ARM constpool value can share the same
+  /// constantpool entry as another ARM constpool value.
+  virtual bool hasSameValue(ARMConstantPoolValue *ACPV);
+
+  virtual void print(raw_ostream &O) const;
+
+  static bool classof(const ARMConstantPoolValue *ACPV) {
+    return ACPV->isMachineBasicBlock();
+  }
+  static bool classof(const ARMConstantPoolMBB *) { return true; }
+};
+
 } // End llvm namespace
 
 #endif
-- 
2.34.1