Extract live range calculations from SplitKit.

[oota-llvm.git] / lib / CodeGen / CriticalAntiDepBreaker.h

diff --git a/lib/CodeGen/CriticalAntiDepBreaker.h b/lib/CodeGen/CriticalAntiDepBreaker.h
index 540630083bcc685112a2a42f7d9eec893c67bc3b..07107802972d5f037b4d1fb217f8ce857feba414 100644 (file)
--- a/lib/CodeGen/CriticalAntiDepBreaker.h
+++ b/lib/CodeGen/CriticalAntiDepBreaker.h
@@ -17,6 +17,7 @@
 #define LLVM_CODEGEN_CRITICALANTIDEPBREAKER_H
 
 #include "AntiDepBreaker.h"
+#include "RegisterClassInfo.h"
 #include "llvm/CodeGen/MachineBasicBlock.h"
 #include "llvm/CodeGen/MachineFrameInfo.h"
 #include "llvm/CodeGen/MachineFunction.h"
@@ -27,6 +28,7 @@
 #include <map>
 
 namespace llvm {
+class RegisterClassInfo;
 class TargetInstrInfo;
 class TargetRegisterInfo;
 
@@ -35,6 +37,7 @@ class TargetRegisterInfo;
     MachineRegisterInfo &MRI;
     const TargetInstrInfo *TII;
     const TargetRegisterInfo *TRI;
+    const RegisterClassInfo &RegClassInfo;
 
     /// AllocatableSet - The set of allocatable registers.
     /// We'll be ignoring anti-dependencies on non-allocatable registers,
@@ -46,26 +49,27 @@ class TargetRegisterInfo;
     /// corresponding value is null. If the register is live but used in
     /// multiple register classes, the corresponding value is -1 casted to a
     /// pointer.
-    const TargetRegisterClass *
-      Classes[TargetRegisterInfo::FirstVirtualRegister];
+    std::vector<const TargetRegisterClass*> Classes;
 
-    /// RegRegs - Map registers to all their references within a live range.
+    /// RegRefs - Map registers to all their references within a live range.
     std::multimap<unsigned, MachineOperand *> RegRefs;
+    typedef std::multimap<unsigned, MachineOperand *>::const_iterator
+      RegRefIter;
 
     /// KillIndices - The index of the most recent kill (proceding bottom-up),
     /// or ~0u if the register is not live.
-    unsigned KillIndices[TargetRegisterInfo::FirstVirtualRegister];
+    std::vector<unsigned> KillIndices;
 
     /// DefIndices - The index of the most recent complete def (proceding bottom
     /// up), or ~0u if the register is live.
-    unsigned DefIndices[TargetRegisterInfo::FirstVirtualRegister];
+    std::vector<unsigned> DefIndices;
 
     /// KeepRegs - A set of registers which are live and cannot be changed to
     /// break anti-dependencies.
     SmallSet<unsigned, 4> KeepRegs;
 
   public:
-    CriticalAntiDepBreaker(MachineFunction& MFi);
+    CriticalAntiDepBreaker(MachineFunction& MFi, const RegisterClassInfo&);
     ~CriticalAntiDepBreaker();
 
     /// Start - Initialize anti-dep breaking for a new basic block.
@@ -78,7 +82,8 @@ class TargetRegisterInfo;
     unsigned BreakAntiDependencies(const std::vector<SUnit>& SUnits,
                                    MachineBasicBlock::iterator Begin,
                                    MachineBasicBlock::iterator End,
-                                   unsigned InsertPosIndex);
+                                   unsigned InsertPosIndex,
+                                   DbgValueVector &DbgValues);
 
     /// Observe - Update liveness information to account for the current
     /// instruction, which will not be scheduled.
@@ -91,10 +96,14 @@ class TargetRegisterInfo;
   private:
     void PrescanInstruction(MachineInstr *MI);
     void ScanInstruction(MachineInstr *MI, unsigned Count);
-    unsigned findSuitableFreeRegister(MachineInstr *MI,
+    bool isNewRegClobberedByRefs(RegRefIter RegRefBegin,
+                                 RegRefIter RegRefEnd,
+                                 unsigned NewReg);
+    unsigned findSuitableFreeRegister(RegRefIter RegRefBegin,
+                                      RegRefIter RegRefEnd,
                                       unsigned AntiDepReg,
                                       unsigned LastNewReg,
-                                      const TargetRegisterClass *);
+                                      const TargetRegisterClass *RC);
   };
 }