diff --git a/llvm/lib/Target/LoongArch/LoongArchISelLowering.h b/llvm/lib/Target/LoongArch/LoongArchISelLowering.h --- a/llvm/lib/Target/LoongArch/LoongArchISelLowering.h +++ b/llvm/lib/Target/LoongArch/LoongArchISelLowering.h @@ -123,6 +123,7 @@ EmitInstrWithCustomInserter(MachineInstr &MI, MachineBasicBlock *BB) const override; SDValue lowerConstantPool(SDValue Op, SelectionDAG &DAG) const; + SDValue lowerEH_DWARF_CFA(SDValue Op, SelectionDAG &DAG) const; SDValue lowerFP_TO_SINT(SDValue Op, SelectionDAG &DAG) const; SDValue lowerBITCAST(SDValue Op, SelectionDAG &DAG) const; SDValue lowerUINT_TO_FP(SDValue Op, SelectionDAG &DAG) const; diff --git a/llvm/lib/Target/LoongArch/LoongArchISelLowering.cpp b/llvm/lib/Target/LoongArch/LoongArchISelLowering.cpp --- a/llvm/lib/Target/LoongArch/LoongArchISelLowering.cpp +++ b/llvm/lib/Target/LoongArch/LoongArchISelLowering.cpp @@ -57,6 +57,10 @@ setOperationAction({ISD::GlobalAddress, ISD::ConstantPool}, GRLenVT, Custom); + setOperationAction(ISD::EH_DWARF_CFA, MVT::i32, Custom); + if (Subtarget.is64Bit()) + setOperationAction(ISD::EH_DWARF_CFA, MVT::i64, Custom); + setOperationAction(ISD::DYNAMIC_STACKALLOC, GRLenVT, Expand); setOperationAction(ISD::VASTART, MVT::Other, Custom); setOperationAction({ISD::VAARG, ISD::VACOPY, ISD::VAEND}, MVT::Other, Expand); @@ -147,6 +151,8 @@ SDValue LoongArchTargetLowering::LowerOperation(SDValue Op, SelectionDAG &DAG) const { switch (Op.getOpcode()) { + case ISD::EH_DWARF_CFA: + return lowerEH_DWARF_CFA(Op, DAG); case ISD::GlobalAddress: return lowerGlobalAddress(Op, DAG); case ISD::SHL_PARTS: @@ -169,6 +175,14 @@ return SDValue(); } +SDValue LoongArchTargetLowering::lowerEH_DWARF_CFA(SDValue Op, + SelectionDAG &DAG) const { + MachineFunction &MF = DAG.getMachineFunction(); + bool Size = Subtarget.getGRLen() / 8; + int FI = MF.getFrameInfo().CreateFixedObject(Size, 0, false); + return DAG.getFrameIndex(FI, getPointerTy(DAG.getDataLayout())); +} + SDValue LoongArchTargetLowering::lowerVASTART(SDValue Op, SelectionDAG &DAG) const { MachineFunction &MF = DAG.getMachineFunction(); diff --git a/llvm/test/CodeGen/LoongArch/eh-dwarf-cfa.ll b/llvm/test/CodeGen/LoongArch/eh-dwarf-cfa.ll new file mode 100644 --- /dev/null +++ b/llvm/test/CodeGen/LoongArch/eh-dwarf-cfa.ll @@ -0,0 +1,37 @@ +; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py +; RUN: llc -mtriple=loongarch32 < %s | FileCheck -check-prefix=LA32 %s +; RUN: llc -mtriple=loongarch64 < %s | FileCheck -check-prefix=LA64 %s + +define void @dwarf() { +; LA32-LABEL: dwarf: +; LA32: # %bb.0: # %entry +; LA32-NEXT: addi.w $sp, $sp, -16 +; LA32-NEXT: .cfi_def_cfa_offset 16 +; LA32-NEXT: st.w $ra, $sp, 12 # 4-byte Folded Spill +; LA32-NEXT: .cfi_offset 1, -4 +; LA32-NEXT: addi.w $a0, $sp, 16 +; LA32-NEXT: bl foo +; LA32-NEXT: ld.w $ra, $sp, 12 # 4-byte Folded Reload +; LA32-NEXT: addi.w $sp, $sp, 16 +; LA32-NEXT: ret +; +; LA64-LABEL: dwarf: +; LA64: # %bb.0: # %entry +; LA64-NEXT: addi.d $sp, $sp, -16 +; LA64-NEXT: .cfi_def_cfa_offset 16 +; LA64-NEXT: st.d $ra, $sp, 8 # 8-byte Folded Spill +; LA64-NEXT: .cfi_offset 1, -8 +; LA64-NEXT: addi.d $a0, $sp, 16 +; LA64-NEXT: bl foo +; LA64-NEXT: ld.d $ra, $sp, 8 # 8-byte Folded Reload +; LA64-NEXT: addi.d $sp, $sp, 16 +; LA64-NEXT: ret +entry: + %0 = call i8* @llvm.eh.dwarf.cfa(i32 0) + call void @foo(i8* %0) + ret void +} + +declare void @foo(i8*) + +declare i8* @llvm.eh.dwarf.cfa(i32) nounwind