Fix a ton of comment typos found by codespell. Patch by

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

diff --git a/lib/CodeGen/CriticalAntiDepBreaker.h b/lib/CodeGen/CriticalAntiDepBreaker.h
index 700851c297c29f07a4d0e9d0f1d242551ead9ab3..0daaef273448785012d177b8eee0361111055e18 100644 (file)
--- a/lib/CodeGen/CriticalAntiDepBreaker.h
+++ b/lib/CodeGen/CriticalAntiDepBreaker.h
@@ -16,20 +16,24 @@
 #ifndef LLVM_CODEGEN_CRITICALANTIDEPBREAKER_H
 #define LLVM_CODEGEN_CRITICALANTIDEPBREAKER_H
 
-#include "llvm/CodeGen/AntiDepBreaker.h"
+#include "AntiDepBreaker.h"
 #include "llvm/CodeGen/MachineBasicBlock.h"
 #include "llvm/CodeGen/MachineFrameInfo.h"
 #include "llvm/CodeGen/MachineFunction.h"
 #include "llvm/CodeGen/MachineRegisterInfo.h"
 #include "llvm/CodeGen/ScheduleDAG.h"
-#include "llvm/Target/TargetRegisterInfo.h"
 #include "llvm/ADT/BitVector.h"
 #include "llvm/ADT/SmallSet.h"
+#include <map>
 
 namespace llvm {
+class TargetInstrInfo;
+class TargetRegisterInfo;
+
   class CriticalAntiDepBreaker : public AntiDepBreaker {
     MachineFunction& MF;
     MachineRegisterInfo &MRI;
+    const TargetInstrInfo *TII;
     const TargetRegisterInfo *TRI;
 
     /// AllocatableSet - The set of allocatable registers.
@@ -42,19 +46,20 @@ namespace llvm {
     /// 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.
@@ -63,20 +68,17 @@ namespace llvm {
   public:
     CriticalAntiDepBreaker(MachineFunction& MFi);
     ~CriticalAntiDepBreaker();
-    
-    /// GetMaxTrials - Critical path anti-dependence breaking requires
-    /// only a single pass
-    unsigned GetMaxTrials() { return 1; }
 
     /// Start - Initialize anti-dep breaking for a new basic block.
     void StartBlock(MachineBasicBlock *BB);
 
-    /// BreakAntiDependencies - Identifiy anti-dependencies along the critical path
+    /// BreakAntiDependencies - Identifiy anti-dependencies along the critical
+    /// path
     /// of the ScheduleDAG and break them by renaming registers.
     ///
-    unsigned BreakAntiDependencies(std::vector<SUnit>& SUnits,
-                                   MachineBasicBlock::iterator& Begin,
-                                   MachineBasicBlock::iterator& End,
+    unsigned BreakAntiDependencies(const std::vector<SUnit>& SUnits,
+                                   MachineBasicBlock::iterator Begin,
+                                   MachineBasicBlock::iterator End,
                                    unsigned InsertPosIndex);
 
     /// Observe - Update liveness information to account for the current
@@ -90,9 +92,14 @@ namespace llvm {
   private:
     void PrescanInstruction(MachineInstr *MI);
     void ScanInstruction(MachineInstr *MI, unsigned Count);
-    unsigned findSuitableFreeRegister(unsigned AntiDepReg,
+    bool isNewRegClobberedByRefs(RegRefIter RegRefBegin,
+                                 RegRefIter RegRefEnd,
+                                 unsigned NewReg);
+    unsigned findSuitableFreeRegister(RegRefIter RegRefBegin,
+                                      RegRefIter RegRefEnd,
+                                      unsigned AntiDepReg,
                                       unsigned LastNewReg,
-                                      const TargetRegisterClass *);
+                                      const TargetRegisterClass *RC);
   };
 }