no really, I can spell!

[oota-llvm.git] / include / llvm / CodeGen / RegisterScavenging.h

diff --git a/include/llvm/CodeGen/RegisterScavenging.h b/include/llvm/CodeGen/RegisterScavenging.h
index 40dd66c06a77d8df144fe49570f3175588dfbff7..458c2e4487f9ce31b6f4769838e970f2daad392f 100644 (file)
--- a/include/llvm/CodeGen/RegisterScavenging.h
+++ b/include/llvm/CodeGen/RegisterScavenging.h
@@ -69,10 +69,6 @@ class RegScavenger {
   /// available, unset means the register is currently being used.
   BitVector RegsAvailable;
 
-  /// ImplicitDefed - If bit is set that means the register is defined by an
-  /// implicit_def instructions. That means it can be clobbered at will.
-  BitVector ImplicitDefed;
-
   /// CurrDist - Distance from MBB entry to the current instruction MBBI.
   ///
   unsigned CurrDist;
@@ -98,6 +94,7 @@ public:
   /// forward / backward - Move the internal MBB iterator and update register
   /// states until it has processed the specific iterator.
   void forward(MachineBasicBlock::iterator I) {
+    if (!Tracking && MBB->begin() != I) forward();
     while (MBBI != I) forward();
   }
   void backward(MachineBasicBlock::iterator I) {
@@ -116,25 +113,18 @@ public:
   bool isUsed(unsigned Reg) const   { return !RegsAvailable[Reg]; }
   bool isUnused(unsigned Reg) const { return RegsAvailable[Reg]; }
 
-  bool isImplicitlyDefined(unsigned Reg) const { return ImplicitDefed[Reg]; }
-
   /// getRegsUsed - return all registers currently in use in used.
   void getRegsUsed(BitVector &used, bool includeReserved);
 
   /// setUsed / setUnused - Mark the state of one or a number of registers.
   ///
-  void setUsed(unsigned Reg, bool ImpDef = false);
-  void setUsed(BitVector Regs, bool ImpDef = false) {
+  void setUsed(unsigned Reg);
+  void setUsed(BitVector &Regs) {
     RegsAvailable &= ~Regs;
-    if (ImpDef)
-      ImplicitDefed |= Regs;
-    else
-      ImplicitDefed &= ~Regs;
   }
   void setUnused(unsigned Reg, const MachineInstr *MI);
-  void setUnused(BitVector Regs) {
+  void setUnused(BitVector &Regs) {
     RegsAvailable |= Regs;
-    ImplicitDefed &= ~Regs;
   }
 
   /// FindUnusedReg - Find a unused register of the specified register class