Big bug fix: getUsableUniRegAtMI needed to return values in arguments

but did not pass the arguments by reference!
Also added a function to get a register class by ID.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@1901 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 13 insertions, 2 deletions

diff --git a/lib/CodeGen/RegAlloc/PhyRegAlloc.h b/lib/CodeGen/RegAlloc/PhyRegAlloc.h
index f3aef1cdc2..ce92298587 100644
--- a/lib/CodeGen/RegAlloc/PhyRegAlloc.h
+++ b/lib/CodeGen/RegAlloc/PhyRegAlloc.h
@@ -92,6 +92,17 @@ public:
   // main method called for allocating registers
   //
   void allocateRegisters();           
+
+
+  // access to register classes by class ID
+  // 
+  const RegClass*  getRegClassByID(unsigned int id) const {
+                                                    return RegClassList[id];
+  }
+        RegClass*  getRegClassByID(unsigned int id)       {
+                                                    return RegClassList[id]; }
+  
+  
 private:
 
 
@@ -133,8 +144,8 @@ private:
 
   int getUsableUniRegAtMI(RegClass *RC, int RegType, 
 			  const MachineInstr *MInst,
-			  const ValueSet *LVSetBef, MachineInstr *MIBef, 
-			  MachineInstr *MIAft );
+			  const ValueSet *LVSetBef, MachineInstr *&MIBef, 
+			  MachineInstr *&MIAft );
 
   int getUnusedUniRegAtMI(RegClass *RC,  const MachineInstr *MInst, 
 		       const ValueSet *LVSetBef);