MachineRegisterInfo: Remove UsedPhysReg infrastructure

[oota-llvm.git] / lib / Target / Hexagon / HexagonFrameLowering.cpp

diff --git a/lib/Target/Hexagon/HexagonFrameLowering.cpp b/lib/Target/Hexagon/HexagonFrameLowering.cpp
index 9797134f41ada35971c749e53804c5a6e40d22eb..29283c81877e46ebfd73dee0e929f30baf499ae8 100644 (file)
--- a/lib/Target/Hexagon/HexagonFrameLowering.cpp
+++ b/lib/Target/Hexagon/HexagonFrameLowering.cpp
@@ -238,7 +238,7 @@ namespace {
         return true;
     return false;
   }
-} // namespace
+}
 
 
 /// Implements shrink-wrapping of the stack frame. By default, stack frame
@@ -864,13 +864,13 @@ static bool needToReserveScavengingSpillSlots(MachineFunction &MF,
   // Check for an unused caller-saved register.
   for ( ; *CallerSavedRegs; ++CallerSavedRegs) {
     MCPhysReg FreeReg = *CallerSavedRegs;
-    if (MRI.isPhysRegUsed(FreeReg))
+    if (!MRI.reg_nodbg_empty(FreeReg))
       continue;
 
     // Check aliased register usage.
     bool IsCurrentRegUsed = false;
     for (MCRegAliasIterator AI(FreeReg, &HRI, false); AI.isValid(); ++AI)
-      if (MRI.isPhysRegUsed(*AI)) {
+      if (!MRI.reg_nodbg_empty(*AI)) {
         IsCurrentRegUsed = true;
         break;
       }
@@ -959,8 +959,11 @@ bool HexagonFrameLowering::replacePredRegPseudoSpillCode(MachineFunction &MF)
 }
 
 
-void HexagonFrameLowering::processFunctionBeforeCalleeSavedScan(
-      MachineFunction &MF, RegScavenger* RS) const {
+void HexagonFrameLowering::determineCalleeSaves(MachineFunction &MF,
+                                                BitVector &SavedRegs,
+                                                RegScavenger *RS) const {
+  TargetFrameLowering::determineCalleeSaves(MF, SavedRegs, RS);
+
   auto &HST = static_cast<const HexagonSubtarget&>(MF.getSubtarget());
   auto &HRI = *HST.getRegisterInfo();
 
@@ -969,11 +972,9 @@ void HexagonFrameLowering::processFunctionBeforeCalleeSavedScan(
   // If we have a function containing __builtin_eh_return we want to spill and
   // restore all callee saved registers. Pretend that they are used.
   if (HasEHReturn) {
-    MachineRegisterInfo &MRI = MF.getRegInfo();
     for (const MCPhysReg *CSRegs = HRI.getCalleeSavedRegs(&MF); *CSRegs;
          ++CSRegs)
-      if (!MRI.isPhysRegUsed(*CSRegs))
-        MRI.setPhysRegUsed(*CSRegs);
+      SavedRegs.set(*CSRegs);
   }
 
   const TargetRegisterClass &RC = Hexagon::IntRegsRegClass;