R600/SI: Only create one instruction when spilling/restoring register v3

[oota-llvm.git] / lib / Target / R600 / SIMachineFunctionInfo.h

diff --git a/lib/Target/R600/SIMachineFunctionInfo.h b/lib/Target/R600/SIMachineFunctionInfo.h
index ef38270d51a104b7e08065926c94748f036f68f0..96e619bde8d6b7931a86edb2238419d2eb9957d3 100644 (file)
--- a/lib/Target/R600/SIMachineFunctionInfo.h
+++ b/lib/Target/R600/SIMachineFunctionInfo.h
@@ -43,7 +43,12 @@ public:
   public:
     unsigned LaneVGPR;
     RegSpillTracker() : CurrentLane(0), SpilledRegisters(), LaneVGPR(0) { }
-    unsigned getNextLane(MachineRegisterInfo &MRI);
+    /// \p NumRegs The number of consecutive registers what need to be spilled.
+    ///            This function will ensure that all registers are stored in
+    ///            the same VGPR.
+    /// \returns The lane to be used for storing the first register.
+    unsigned reserveLanes(MachineRegisterInfo &MRI, MachineFunction *MF,
+                          unsigned NumRegs = 1);
     void addSpilledReg(unsigned FrameIndex, unsigned Reg, int Lane = -1);
     const SpilledReg& getSpilledReg(unsigned FrameIndex);
     bool programSpillsRegisters() { return !SpilledRegisters.empty(); }