no really, I can spell!

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

diff --git a/include/llvm/CodeGen/LiveStackAnalysis.h b/include/llvm/CodeGen/LiveStackAnalysis.h
index 5c88bb83c5292dc3ed51f800ca71bd5d905e444e..27ae1be7f9133b89f81d08169fb33f6e851adbee 100644 (file)
--- a/include/llvm/CodeGen/LiveStackAnalysis.h
+++ b/include/llvm/CodeGen/LiveStackAnalysis.h
@@ -18,6 +18,7 @@
 
 #include "llvm/CodeGen/MachineFunctionPass.h"
 #include "llvm/CodeGen/LiveInterval.h"
+#include "llvm/Target/TargetRegisterInfo.h"
 #include "llvm/Support/Allocator.h"
 #include <map>
 
@@ -28,27 +29,67 @@ namespace llvm {
     ///
     BumpPtrAllocator VNInfoAllocator;
 
-    /// s2iMap - Stack slot indices to live interval mapping.
+    /// S2IMap - Stack slot indices to live interval mapping.
     ///
     typedef std::map<int, LiveInterval> SS2IntervalMap;
-    SS2IntervalMap s2iMap;
+    SS2IntervalMap S2IMap;
 
+    /// S2RCMap - Stack slot indices to register class mapping.
+    std::map<int, const TargetRegisterClass*> S2RCMap;
+    
   public:
     static char ID; // Pass identification, replacement for typeid
     LiveStacks() : MachineFunctionPass(&ID) {}
 
     typedef SS2IntervalMap::iterator iterator;
     typedef SS2IntervalMap::const_iterator const_iterator;
-    const_iterator begin() const { return s2iMap.begin(); }
-    const_iterator end() const { return s2iMap.end(); }
-    iterator begin() { return s2iMap.begin(); }
-    iterator end() { return s2iMap.end(); }
-    unsigned getNumIntervals() const { return (unsigned)s2iMap.size(); }
-
-    LiveInterval &getOrCreateInterval(int Slot) {
-      SS2IntervalMap::iterator I = s2iMap.find(Slot);
-      if (I == s2iMap.end())
-        I = s2iMap.insert(I,std::make_pair(Slot,LiveInterval(Slot,0.0F,true)));
+    const_iterator begin() const { return S2IMap.begin(); }
+    const_iterator end() const { return S2IMap.end(); }
+    iterator begin() { return S2IMap.begin(); }
+    iterator end() { return S2IMap.end(); }
+
+    void scaleNumbering(int factor);
+
+    unsigned getNumIntervals() const { return (unsigned)S2IMap.size(); }
+
+    LiveInterval &getOrCreateInterval(int Slot, const TargetRegisterClass *RC) {
+      assert(Slot >= 0 && "Spill slot indice must be >= 0");
+      SS2IntervalMap::iterator I = S2IMap.find(Slot);
+      if (I == S2IMap.end()) {
+        I = S2IMap.insert(I,std::make_pair(Slot, LiveInterval(Slot,0.0F,true)));
+        S2RCMap.insert(std::make_pair(Slot, RC));
+      } else {
+        // Use the largest common subclass register class.
+        const TargetRegisterClass *OldRC = S2RCMap[Slot];
+        S2RCMap[Slot] = getCommonSubClass(OldRC, RC);
+      }
+      return I->second;
+    }
+
+    LiveInterval &getInterval(int Slot) {
+      assert(Slot >= 0 && "Spill slot indice must be >= 0");
+      SS2IntervalMap::iterator I = S2IMap.find(Slot);
+      assert(I != S2IMap.end() && "Interval does not exist for stack slot");
+      return I->second;
+    }
+
+    const LiveInterval &getInterval(int Slot) const {
+      assert(Slot >= 0 && "Spill slot indice must be >= 0");
+      SS2IntervalMap::const_iterator I = S2IMap.find(Slot);
+      assert(I != S2IMap.end() && "Interval does not exist for stack slot");
+      return I->second;
+    }
+
+    bool hasInterval(int Slot) const {
+      return S2IMap.count(Slot);
+    }
+
+    const TargetRegisterClass *getIntervalRegClass(int Slot) const {
+      assert(Slot >= 0 && "Spill slot indice must be >= 0");
+      std::map<int, const TargetRegisterClass*>::const_iterator
+        I = S2RCMap.find(Slot);
+      assert(I != S2RCMap.end() &&
+             "Register class info does not exist for stack slot");
       return I->second;
     }