return SDValue();
}
- // Currently only support lowering frame address for current frame.
- if (cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue() != 0) {
- DAG.getContext()->emitError(
- "frame address can only be determined for the current frame");
- return SDValue();
- }
-
MachineFunction &MF = DAG.getMachineFunction();
MF.getFrameInfo().setFrameAddressIsTaken(true);
-
- return DAG.getCopyFromReg(DAG.getEntryNode(), SDLoc(Op),
- Subtarget.getRegisterInfo()->getFrameRegister(MF),
- Op.getValueType());
+ Register FrameReg = Subtarget.getRegisterInfo()->getFrameRegister(MF);
+ EVT VT = Op.getValueType();
+ SDLoc DL(Op);
+ SDValue FrameAddr = DAG.getCopyFromReg(DAG.getEntryNode(), DL, FrameReg, VT);
+ unsigned Depth = cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue();
+ int GRLenInBytes = Subtarget.getGRLen() / 8;
+
+ while (Depth--) {
+ int Offset = -(GRLenInBytes * 2);
+ SDValue Ptr = DAG.getNode(ISD::ADD, DL, VT, FrameAddr,
+ DAG.getIntPtrConstant(Offset, DL));
+ FrameAddr =
+ DAG.getLoad(VT, DL, DAG.getEntryNode(), Ptr, MachinePointerInfo());
+ }
+ return FrameAddr;
}
SDValue LoongArchTargetLowering::lowerRETURNADDR(SDValue Op,
ret ptr %1
}
+define ptr @test_frameaddress_2() nounwind {
+; LA32-LABEL: test_frameaddress_2:
+; LA32: # %bb.0:
+; LA32-NEXT: addi.w $sp, $sp, -16
+; LA32-NEXT: st.w $ra, $sp, 12 # 4-byte Folded Spill
+; LA32-NEXT: st.w $fp, $sp, 8 # 4-byte Folded Spill
+; LA32-NEXT: addi.w $fp, $sp, 16
+; LA32-NEXT: ld.w $a0, $fp, -8
+; LA32-NEXT: ld.w $a0, $a0, -8
+; LA32-NEXT: ld.w $fp, $sp, 8 # 4-byte Folded Reload
+; LA32-NEXT: ld.w $ra, $sp, 12 # 4-byte Folded Reload
+; LA32-NEXT: addi.w $sp, $sp, 16
+; LA32-NEXT: ret
+;
+; LA64-LABEL: test_frameaddress_2:
+; LA64: # %bb.0:
+; LA64-NEXT: addi.d $sp, $sp, -16
+; LA64-NEXT: st.d $ra, $sp, 8 # 8-byte Folded Spill
+; LA64-NEXT: st.d $fp, $sp, 0 # 8-byte Folded Spill
+; LA64-NEXT: addi.d $fp, $sp, 16
+; LA64-NEXT: ld.d $a0, $fp, -16
+; LA64-NEXT: ld.d $a0, $a0, -16
+; LA64-NEXT: ld.d $fp, $sp, 0 # 8-byte Folded Reload
+; LA64-NEXT: ld.d $ra, $sp, 8 # 8-byte Folded Reload
+; LA64-NEXT: addi.d $sp, $sp, 16
+; LA64-NEXT: ret
+ %1 = call ptr @llvm.frameaddress(i32 2)
+ ret ptr %1
+}
+
define ptr @test_returnaddress_0() nounwind {
; LA32-LABEL: test_returnaddress_0:
; LA32: # %bb.0: