forked from OSchip/llvm-project
The return save offset can be computed at initialization time - do
so and save the value. llvm-svn: 228996
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@ -36,10 +36,17 @@ static const uint16_t VRRegNo[] = {
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PPC::V24, PPC::V25, PPC::V26, PPC::V27, PPC::V28, PPC::V29, PPC::V30, PPC::V31
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PPC::V24, PPC::V25, PPC::V26, PPC::V27, PPC::V28, PPC::V29, PPC::V30, PPC::V31
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};
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};
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static unsigned computeReturnSaveOffset(const PPCSubtarget &STI) {
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if (STI.isDarwinABI())
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return STI.isPPC64() ? 16 : 8;
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// SVR4 ABI:
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return STI.isPPC64() ? 16 : 4;
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}
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PPCFrameLowering::PPCFrameLowering(const PPCSubtarget &STI)
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PPCFrameLowering::PPCFrameLowering(const PPCSubtarget &STI)
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: TargetFrameLowering(TargetFrameLowering::StackGrowsDown,
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: TargetFrameLowering(TargetFrameLowering::StackGrowsDown,
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(STI.hasQPX() || STI.isBGQ()) ? 32 : 16, 0),
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(STI.hasQPX() || STI.isBGQ()) ? 32 : 16, 0),
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Subtarget(STI) {}
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Subtarget(STI), ReturnSaveOffset(computeReturnSaveOffset(Subtarget)) {}
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// With the SVR4 ABI, callee-saved registers have fixed offsets on the stack.
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// With the SVR4 ABI, callee-saved registers have fixed offsets on the stack.
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const PPCFrameLowering::SpillSlot *PPCFrameLowering::getCalleeSavedSpillSlots(
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const PPCFrameLowering::SpillSlot *PPCFrameLowering::getCalleeSavedSpillSlots(
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@ -598,7 +605,7 @@ void PPCFrameLowering::emitPrologue(MachineFunction &MF) const {
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assert((isPPC64 || !isSVR4ABI || !(!FrameSize && (MustSaveLR || HasFP))) &&
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assert((isPPC64 || !isSVR4ABI || !(!FrameSize && (MustSaveLR || HasFP))) &&
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"FrameSize must be >0 to save/restore the FP or LR for 32-bit SVR4.");
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"FrameSize must be >0 to save/restore the FP or LR for 32-bit SVR4.");
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int LROffset = PPCFrameLowering::getReturnSaveOffset(isPPC64, isDarwinABI);
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int LROffset = getReturnSaveOffset();
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int FPOffset = 0;
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int FPOffset = 0;
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if (HasFP) {
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if (HasFP) {
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@ -936,7 +943,7 @@ void PPCFrameLowering::emitEpilogue(MachineFunction &MF,
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const MCInstrDesc& AddInst = TII.get( isPPC64 ? PPC::ADD8
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const MCInstrDesc& AddInst = TII.get( isPPC64 ? PPC::ADD8
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: PPC::ADD4 );
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: PPC::ADD4 );
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int LROffset = PPCFrameLowering::getReturnSaveOffset(isPPC64, isDarwinABI);
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int LROffset = getReturnSaveOffset();
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int FPOffset = 0;
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int FPOffset = 0;
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if (HasFP) {
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if (HasFP) {
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@ -23,6 +23,7 @@ class PPCSubtarget;
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class PPCFrameLowering: public TargetFrameLowering {
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class PPCFrameLowering: public TargetFrameLowering {
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const PPCSubtarget &Subtarget;
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const PPCSubtarget &Subtarget;
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const unsigned ReturnSaveOffset;
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public:
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public:
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PPCFrameLowering(const PPCSubtarget &STI);
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PPCFrameLowering(const PPCSubtarget &STI);
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@ -67,12 +68,7 @@ public:
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/// getReturnSaveOffset - Return the previous frame offset to save the
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/// getReturnSaveOffset - Return the previous frame offset to save the
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/// return address.
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/// return address.
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static unsigned getReturnSaveOffset(bool isPPC64, bool isDarwinABI) {
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unsigned getReturnSaveOffset() const { return ReturnSaveOffset; }
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if (isDarwinABI)
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return isPPC64 ? 16 : 8;
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// SVR4 ABI:
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return isPPC64 ? 16 : 4;
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}
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/// getTOCSaveOffset - Return the previous frame offset to save the
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/// getTOCSaveOffset - Return the previous frame offset to save the
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/// TOC register -- 64-bit SVR4 ABI only.
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/// TOC register -- 64-bit SVR4 ABI only.
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@ -3472,8 +3472,10 @@ static SDValue EmitTailCallStoreFPAndRetAddr(SelectionDAG &DAG,
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if (SPDiff) {
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if (SPDiff) {
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// Calculate the new stack slot for the return address.
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// Calculate the new stack slot for the return address.
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int SlotSize = isPPC64 ? 8 : 4;
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int SlotSize = isPPC64 ? 8 : 4;
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int NewRetAddrLoc = SPDiff + PPCFrameLowering::getReturnSaveOffset(isPPC64,
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int NewRetAddrLoc = SPDiff +
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isDarwinABI);
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MF.getSubtarget<PPCSubtarget>()
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.getFrameLowering()
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->getReturnSaveOffset();
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int NewRetAddr = MF.getFrameInfo()->CreateFixedObject(SlotSize,
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int NewRetAddr = MF.getFrameInfo()->CreateFixedObject(SlotSize,
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NewRetAddrLoc, true);
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NewRetAddrLoc, true);
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EVT VT = isPPC64 ? MVT::i64 : MVT::i32;
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EVT VT = isPPC64 ? MVT::i64 : MVT::i32;
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@ -5308,7 +5310,6 @@ SDValue
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PPCTargetLowering::getReturnAddrFrameIndex(SelectionDAG & DAG) const {
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PPCTargetLowering::getReturnAddrFrameIndex(SelectionDAG & DAG) const {
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MachineFunction &MF = DAG.getMachineFunction();
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MachineFunction &MF = DAG.getMachineFunction();
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bool isPPC64 = Subtarget.isPPC64();
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bool isPPC64 = Subtarget.isPPC64();
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bool isDarwinABI = Subtarget.isDarwinABI();
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EVT PtrVT = DAG.getTargetLoweringInfo().getPointerTy();
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EVT PtrVT = DAG.getTargetLoweringInfo().getPointerTy();
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// Get current frame pointer save index. The users of this index will be
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// Get current frame pointer save index. The users of this index will be
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@ -5319,7 +5320,7 @@ PPCTargetLowering::getReturnAddrFrameIndex(SelectionDAG & DAG) const {
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// If the frame pointer save index hasn't been defined yet.
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// If the frame pointer save index hasn't been defined yet.
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if (!RASI) {
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if (!RASI) {
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// Find out what the fix offset of the frame pointer save area.
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// Find out what the fix offset of the frame pointer save area.
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int LROffset = PPCFrameLowering::getReturnSaveOffset(isPPC64, isDarwinABI);
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int LROffset = Subtarget.getFrameLowering()->getReturnSaveOffset();
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// Allocate the frame index for frame pointer save area.
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// Allocate the frame index for frame pointer save area.
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RASI = MF.getFrameInfo()->CreateFixedObject(isPPC64? 8 : 4, LROffset, false);
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RASI = MF.getFrameInfo()->CreateFixedObject(isPPC64? 8 : 4, LROffset, false);
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// Save the result.
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// Save the result.
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@ -9699,14 +9700,12 @@ SDValue PPCTargetLowering::LowerRETURNADDR(SDValue Op,
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PPCFunctionInfo *FuncInfo = MF.getInfo<PPCFunctionInfo>();
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PPCFunctionInfo *FuncInfo = MF.getInfo<PPCFunctionInfo>();
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FuncInfo->setLRStoreRequired();
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FuncInfo->setLRStoreRequired();
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bool isPPC64 = Subtarget.isPPC64();
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bool isPPC64 = Subtarget.isPPC64();
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bool isDarwinABI = Subtarget.isDarwinABI();
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if (Depth > 0) {
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if (Depth > 0) {
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SDValue FrameAddr = LowerFRAMEADDR(Op, DAG);
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SDValue FrameAddr = LowerFRAMEADDR(Op, DAG);
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SDValue Offset =
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SDValue Offset =
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DAG.getConstant(Subtarget.getFrameLowering()->getReturnSaveOffset(),
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DAG.getConstant(PPCFrameLowering::getReturnSaveOffset(isPPC64, isDarwinABI),
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isPPC64 ? MVT::i64 : MVT::i32);
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isPPC64? MVT::i64 : MVT::i32);
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return DAG.getLoad(getPointerTy(), dl, DAG.getEntryNode(),
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return DAG.getLoad(getPointerTy(), dl, DAG.getEntryNode(),
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DAG.getNode(ISD::ADD, dl, getPointerTy(),
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DAG.getNode(ISD::ADD, dl, getPointerTy(),
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FrameAddr, Offset),
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FrameAddr, Offset),
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