Added support for spilling

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@992 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 38 insertions, 0 deletions

diff --git a/lib/CodeGen/RegAlloc/LiveRange.h b/lib/CodeGen/RegAlloc/LiveRange.h
index 0d0f8ae1b8..23c217cd7a 100644
--- a/lib/CodeGen/RegAlloc/LiveRange.h
+++ b/lib/CodeGen/RegAlloc/LiveRange.h
@@ -55,6 +55,11 @@ class LiveRange : public ValueSet
 
   bool CanUseSuggestedCol;
 
+  // if this LR is spilled, its stack offset from *FP*. The spilled offsets
+  // must always be relative to the FP.
+  int SpilledStackOffsetFromFP;
+  bool HasSpillOffset;
+
  public:
 
 
@@ -88,6 +93,33 @@ class LiveRange : public ValueSet
   
   inline void markForSpill() { mustSpill = true; }
 
+  inline bool isMarkedForSpill() { return  mustSpill; }
+
+  inline void setSpillOffFromFP(int StackOffset) {
+    assert( mustSpill && "This LR is not spilled");
+    SpilledStackOffsetFromFP = StackOffset;
+    HasSpillOffset = true;
+  }
+
+  inline void modifySpillOffFromFP(int StackOffset) {
+    assert( mustSpill && "This LR is not spilled");
+    SpilledStackOffsetFromFP = StackOffset;
+    HasSpillOffset = true;
+  }
+
+
+
+  inline bool hasSpillOffset() {
+    return  HasSpillOffset;
+  }
+
+
+  inline int getSpillOffFromFP() const {
+    assert( HasSpillOffset && "This LR is not spilled");
+    return SpilledStackOffsetFromFP;
+  }
+
+
   inline void markForSaveAcrossCalls() { mustSaveAcrossCalls = true; }
 
   // inline void markForLoadFromStack() { mustLoadFromStack = true; 
@@ -135,6 +167,11 @@ class LiveRange : public ValueSet
   }
 
 
+
+
+
+
+
   inline LiveRange() : ValueSet() /* , CallInterferenceList() */
     {
       Color = SuggestedColor = -1;      // not yet colored 
@@ -143,6 +180,7 @@ class LiveRange : public ValueSet
       UserIGNode = NULL;
       doesSpanAcrossCalls = false;
       CanUseSuggestedCol = true;
+      HasSpillOffset  = false;
     }
 
 };