Implement builtin_return_address(x) and builtin_frame_address(x)
on PPC for x!=0. 7624113.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102972 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/PowerPC/PPCISelLowering.cpp b/lib/Target/PowerPC/PPCISelLowering.cpp
index 91f3b3d..6f11953 100644
--- a/lib/Target/PowerPC/PPCISelLowering.cpp
+++ b/lib/Target/PowerPC/PPCISelLowering.cpp
@@ -4298,7 +4298,7 @@
// Create a stack slot that is 16-byte aligned.
MachineFrameInfo *FrameInfo = DAG.getMachineFunction().getFrameInfo();
int FrameIdx = FrameInfo->CreateStackObject(16, 16, false);
- EVT PtrVT = DAG.getTargetLoweringInfo().getPointerTy();
+ EVT PtrVT = getPointerTy();
SDValue FIdx = DAG.getFrameIndex(FrameIdx, PtrVT);
// Store the input value into Value#0 of the stack slot.
@@ -5497,45 +5497,56 @@
SDValue PPCTargetLowering::LowerRETURNADDR(SDValue Op,
SelectionDAG &DAG) const {
DebugLoc dl = Op.getDebugLoc();
- // Depths > 0 not supported yet!
- if (cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue() > 0)
- return SDValue();
+ unsigned Depth = cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue();
+ // Make sure the function does not optimize away the store of the RA to
+ // the stack.
MachineFunction &MF = DAG.getMachineFunction();
PPCFunctionInfo *FuncInfo = MF.getInfo<PPCFunctionInfo>();
+ FuncInfo->setLRStoreRequired();
+ bool isPPC64 = PPCSubTarget.isPPC64();
+ bool isDarwinABI = PPCSubTarget.isDarwinABI();
+
+ if (Depth > 0) {
+ SDValue FrameAddr = LowerFRAMEADDR(Op, DAG);
+ SDValue Offset =
+
+ DAG.getConstant(PPCFrameInfo::getReturnSaveOffset(isPPC64, isDarwinABI),
+ isPPC64? MVT::i64 : MVT::i32);
+ return DAG.getLoad(getPointerTy(), dl, DAG.getEntryNode(),
+ DAG.getNode(ISD::ADD, dl, getPointerTy(),
+ FrameAddr, Offset),
+ NULL, 0, false, false, 0);
+ }
// Just load the return address off the stack.
SDValue RetAddrFI = getReturnAddrFrameIndex(DAG);
-
- // Make sure the function really does not optimize away the store of the RA
- // to the stack.
- FuncInfo->setLRStoreRequired();
- return DAG.getLoad(getPointerTy(), dl,
- DAG.getEntryNode(), RetAddrFI, NULL, 0,
- false, false, 0);
+ return DAG.getLoad(getPointerTy(), dl, DAG.getEntryNode(),
+ RetAddrFI, NULL, 0, false, false, 0);
}
SDValue PPCTargetLowering::LowerFRAMEADDR(SDValue Op,
SelectionDAG &DAG) const {
DebugLoc dl = Op.getDebugLoc();
- // Depths > 0 not supported yet!
- if (cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue() > 0)
- return SDValue();
+ unsigned Depth = cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue();
EVT PtrVT = DAG.getTargetLoweringInfo().getPointerTy();
bool isPPC64 = PtrVT == MVT::i64;
MachineFunction &MF = DAG.getMachineFunction();
MachineFrameInfo *MFI = MF.getFrameInfo();
- bool is31 = (DisableFramePointerElim(MF) || MFI->hasVarSizedObjects())
- && MFI->getStackSize();
-
- if (isPPC64)
- return DAG.getCopyFromReg(DAG.getEntryNode(), dl, is31 ? PPC::X31 : PPC::X1,
- MVT::i64);
- else
- return DAG.getCopyFromReg(DAG.getEntryNode(), dl, is31 ? PPC::R31 : PPC::R1,
- MVT::i32);
+ MFI->setFrameAddressIsTaken(true);
+ bool is31 = (DisableFramePointerElim(MF) || MFI->hasVarSizedObjects()) &&
+ MFI->getStackSize() &&
+ !MF.getFunction()->hasFnAttr(Attribute::Naked);
+ unsigned FrameReg = isPPC64 ? (is31 ? PPC::X31 : PPC::X1) :
+ (is31 ? PPC::R31 : PPC::R1);
+ SDValue FrameAddr = DAG.getCopyFromReg(DAG.getEntryNode(), dl, FrameReg,
+ PtrVT);
+ while (Depth--)
+ FrameAddr = DAG.getLoad(Op.getValueType(), dl, DAG.getEntryNode(),
+ FrameAddr, NULL, 0, false, false, 0);
+ return FrameAddr;
}
bool