1 files changed, 16 insertions, 3 deletions
diff --git a/include/llvm/Target/TargetFrameLowering.h b/include/llvm/Target/TargetFrameLowering.h
index a60147f5c092..bfddd0601794 100644
--- a/include/llvm/Target/TargetFrameLowering.h
+++ b/include/llvm/Target/TargetFrameLowering.h
@@ -93,6 +93,19 @@ public:
   /// stack pointer.
   virtual bool isFPCloseToIncomingSP() const { return true; }
 
+  /// assignCalleeSavedSpillSlots - Allows target to override spill slot
+  /// assignment logic.  If implemented, assignCalleeSavedSpillSlots() should
+  /// assign frame slots to all CSI entries and return true.  If this method
+  /// returns false, spill slots will be assigned using generic implementation.
+  /// assignCalleeSavedSpillSlots() may add, delete or rearrange elements of
+  /// CSI.
+  virtual bool
+  assignCalleeSavedSpillSlots(MachineFunction &MF,
+                              const TargetRegisterInfo *TRI,
+                              std::vector<CalleeSavedInfo> &CSI) const {
+    return false;
+  }
+
   /// getCalleeSavedSpillSlots - This method returns a pointer to an array of
   /// pairs, that contains an entry for each callee saved register that must be
   /// spilled to a particular stack location if it is spilled.
@@ -105,7 +118,7 @@ public:
   virtual const SpillSlot *
   getCalleeSavedSpillSlots(unsigned &NumEntries) const {
     NumEntries = 0;
-    return 0;
+    return nullptr;
   }
 
   /// targetHandlesStackFrameRounding - Returns true if the target is
@@ -190,7 +203,7 @@ public:
   /// before PrologEpilogInserter scans the physical registers used to determine
   /// what callee saved registers should be spilled. This method is optional.
   virtual void processFunctionBeforeCalleeSavedScan(MachineFunction &MF,
-                                                RegScavenger *RS = NULL) const {
+                                             RegScavenger *RS = nullptr) const {
 
   }
 
@@ -200,7 +213,7 @@ public:
   /// replaced with direct constants.  This method is optional.
   ///
   virtual void processFunctionBeforeFrameFinalized(MachineFunction &MF,
-                                               RegScavenger *RS = NULL) const {
+                                             RegScavenger *RS = nullptr) const {
   }
 
   /// eliminateCallFramePseudoInstr - This method is called during prolog/epilog