Note in PPCFunctionInfo VRSAVE spills

In preparation for using the new register scavenger capability for providing
more than one register simultaneously, specifically note functions that have
spilled VRSAVE (currently, this can happen only in functions that use the
setjmp intrinsic). As with CR spilling, such functions will need to provide two
emergency spill slots to the scavenger.

No functionality change intended.

llvm-svn: 177832

1 files changed, 18 insertions, 10 deletions

diff --git a/llvm/lib/Target/PowerPC/PPCInstrInfo.cpp b/llvm/lib/Target/PowerPC/PPCInstrInfo.cpp
index 21e6248ffdf..2be8df9f988 100644
--- a/llvm/lib/Target/PowerPC/PPCInstrInfo.cpp
+++ b/llvm/lib/Target/PowerPC/PPCInstrInfo.cpp
@@ -440,7 +440,7 @@ PPCInstrInfo::StoreRegToStackSlot(MachineFunction &MF,
                                   int FrameIdx,
                                   const TargetRegisterClass *RC,
                                   SmallVectorImpl<MachineInstr*> &NewMIs,
-                                  bool &NonRI) const{
+                                  bool &NonRI, bool &SpillsVRS) const{
   DebugLoc DL;
   if (PPC::GPRCRegClass.hasSubClassEq(RC)) {
     NewMIs.push_back(addFrameReference(BuildMI(MF, DL, get(PPC::STW))
@@ -500,7 +500,7 @@ PPCInstrInfo::StoreRegToStackSlot(MachineFunction &MF,
       Reg = PPC::CR7;
 
     return StoreRegToStackSlot(MF, Reg, isKill, FrameIdx,
-                               &PPC::CRRCRegClass, NewMIs, NonRI);
+                               &PPC::CRRCRegClass, NewMIs, NonRI, SpillsVRS);
 
   } else if (PPC::VRRCRegClass.hasSubClassEq(RC)) {
     NewMIs.push_back(addFrameReference(BuildMI(MF, DL, get(PPC::STVX))
@@ -513,7 +513,7 @@ PPCInstrInfo::StoreRegToStackSlot(MachineFunction &MF,
                                        .addReg(SrcReg,
                                                getKillRegState(isKill)),
                                        FrameIdx));
-    NonRI = true;
+    SpillsVRS = true;
   } else {
     llvm_unreachable("Unknown regclass!");
   }
@@ -533,10 +533,14 @@ PPCInstrInfo::storeRegToStackSlot(MachineBasicBlock &MBB,
   PPCFunctionInfo *FuncInfo = MF.getInfo<PPCFunctionInfo>();
   FuncInfo->setHasSpills();
 
-  bool NonRI = false;
-  if (StoreRegToStackSlot(MF, SrcReg, isKill, FrameIdx, RC, NewMIs, NonRI))
+  bool NonRI = false, SpillsVRS = false;
+  if (StoreRegToStackSlot(MF, SrcReg, isKill, FrameIdx, RC, NewMIs,
+                          NonRI, SpillsVRS))
     FuncInfo->setSpillsCR();
 
+  if (SpillsVRS)
+    FuncInfo->setSpillsVRSAVE();
+
   if (NonRI)
     FuncInfo->setHasNonRISpills();
 
@@ -557,7 +561,7 @@ PPCInstrInfo::LoadRegFromStackSlot(MachineFunction &MF, DebugLoc DL,
                                    unsigned DestReg, int FrameIdx,
                                    const TargetRegisterClass *RC,
                                    SmallVectorImpl<MachineInstr*> &NewMIs,
-                                   bool &NonRI) const{
+                                   bool &NonRI, bool &SpillsVRS) const{
   if (PPC::GPRCRegClass.hasSubClassEq(RC)) {
     if (DestReg != PPC::LR) {
       NewMIs.push_back(addFrameReference(BuildMI(MF, DL, get(PPC::LWZ),
@@ -616,7 +620,7 @@ PPCInstrInfo::LoadRegFromStackSlot(MachineFunction &MF, DebugLoc DL,
       Reg = PPC::CR7;
 
     return LoadRegFromStackSlot(MF, DL, Reg, FrameIdx,
-                                &PPC::CRRCRegClass, NewMIs, NonRI);
+                                &PPC::CRRCRegClass, NewMIs, NonRI, SpillsVRS);
 
   } else if (PPC::VRRCRegClass.hasSubClassEq(RC)) {
     NewMIs.push_back(addFrameReference(BuildMI(MF, DL, get(PPC::LVX), DestReg),
@@ -627,7 +631,7 @@ PPCInstrInfo::LoadRegFromStackSlot(MachineFunction &MF, DebugLoc DL,
                                                get(PPC::RESTORE_VRSAVE),
                                                DestReg),
                                        FrameIdx));
-    NonRI = true;
+    SpillsVRS = true;
   } else {
     llvm_unreachable("Unknown regclass!");
   }
@@ -649,10 +653,14 @@ PPCInstrInfo::loadRegFromStackSlot(MachineBasicBlock &MBB,
   PPCFunctionInfo *FuncInfo = MF.getInfo<PPCFunctionInfo>();
   FuncInfo->setHasSpills();
 
-  bool NonRI = false;
-  if (LoadRegFromStackSlot(MF, DL, DestReg, FrameIdx, RC, NewMIs, NonRI))
+  bool NonRI = false, SpillsVRS = false;
+  if (LoadRegFromStackSlot(MF, DL, DestReg, FrameIdx, RC, NewMIs,
+                           NonRI, SpillsVRS))
     FuncInfo->setSpillsCR();
 
+  if (SpillsVRS)
+    FuncInfo->setSpillsVRSAVE();
+
   if (NonRI)
     FuncInfo->setHasNonRISpills();