From: Rafael Espindola Date: Sat, 24 Nov 2012 03:10:54 +0000 (+0000) Subject: Give each MCCFIInstruction its own opcode. X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=5dce65b21e5e5b76c523d95e9a7ed4b7cb741bc8;p=platform%2Fupstream%2Fllvm.git Give each MCCFIInstruction its own opcode. This untangles the switch cases of the old Move and RelMove opcodes a bit and makes it clear how to add new instructions. llvm-svn: 168534 --- diff --git a/llvm/include/llvm/MC/MCDwarf.h b/llvm/include/llvm/MC/MCDwarf.h index 77b5f1c..34cc8e7 100644 --- a/llvm/include/llvm/MC/MCDwarf.h +++ b/llvm/include/llvm/MC/MCDwarf.h @@ -266,8 +266,9 @@ namespace llvm { class MCCFIInstruction { public: - enum OpType { SameValue, RememberState, RestoreState, Move, RelMove, Escape, - Restore, Undefined }; + enum OpType { OpSameValue, OpRememberState, OpRestoreState, OpOffset, + OpDefCfaRegister, OpDefCfaOffset, OpDefCfa, OpRelOffset, + OpAdjustCfaOffset, OpEscape, OpRestore, OpUndefined }; private: OpType Operation; MCSymbol *Label; @@ -283,11 +284,10 @@ namespace llvm { public: static MCCFIInstruction - createCFIOffset(MCSymbol *L, unsigned Register, int Offset) { + createOffset(MCSymbol *L, unsigned Register, int Offset) { MachineLocation Dest(Register, Offset); MachineLocation Source(Register, Offset); - - MCCFIInstruction Ret(Move, L, Dest, Source, ""); + MCCFIInstruction Ret(OpOffset, L, Dest, Source, ""); return Ret; } @@ -295,14 +295,14 @@ namespace llvm { createDefCfaRegister(MCSymbol *L, unsigned Register) { MachineLocation Dest(Register); MachineLocation Source(MachineLocation::VirtualFP); - MCCFIInstruction Ret(Move, L, Dest, Source, ""); + MCCFIInstruction Ret(OpDefCfaRegister, L, Dest, Source, ""); return Ret; } static MCCFIInstruction createDefCfaOffset(MCSymbol *L, int Offset) { MachineLocation Dest(MachineLocation::VirtualFP); MachineLocation Source(MachineLocation::VirtualFP, -Offset); - MCCFIInstruction Ret(Move, L, Dest, Source, ""); + MCCFIInstruction Ret(OpDefCfaOffset, L, Dest, Source, ""); return Ret; } @@ -310,40 +310,40 @@ namespace llvm { createDefCfa(MCSymbol *L, unsigned Register, int Offset) { MachineLocation Dest(MachineLocation::VirtualFP); MachineLocation Source(Register, -Offset); - MCCFIInstruction Ret(Move, L, Dest, Source, ""); + MCCFIInstruction Ret(OpDefCfa, L, Dest, Source, ""); return Ret; } static MCCFIInstruction createUndefined(MCSymbol *L, unsigned Register) { MachineLocation Dummy; MachineLocation Dest(Register); - MCCFIInstruction Ret(Undefined, L, Dest, Dummy, ""); + MCCFIInstruction Ret(OpUndefined, L, Dest, Dummy, ""); return Ret; } static MCCFIInstruction createRestore(MCSymbol *L, unsigned Register) { MachineLocation Dummy; MachineLocation Dest(Register); - MCCFIInstruction Ret(Restore, L, Dest, Dummy, ""); + MCCFIInstruction Ret(OpRestore, L, Dest, Dummy, ""); return Ret; } static MCCFIInstruction createSameValue(MCSymbol *L, unsigned Register) { MachineLocation Dummy; MachineLocation Dest(Register); - MCCFIInstruction Ret(SameValue, L, Dest, Dummy, ""); + MCCFIInstruction Ret(OpSameValue, L, Dest, Dummy, ""); return Ret; } static MCCFIInstruction createRestoreState(MCSymbol *L) { MachineLocation Dummy; - MCCFIInstruction Ret(RestoreState, L, Dummy, Dummy, ""); + MCCFIInstruction Ret(OpRestoreState, L, Dummy, Dummy, ""); return Ret; } static MCCFIInstruction createRememberState(MCSymbol *L) { MachineLocation Dummy; - MCCFIInstruction Ret(RememberState, L, Dummy, Dummy, ""); + MCCFIInstruction Ret(OpRememberState, L, Dummy, Dummy, ""); return Ret; } @@ -351,7 +351,7 @@ namespace llvm { createRelOffset(MCSymbol *L, unsigned Register, int Offset) { MachineLocation Dest(Register, Offset); MachineLocation Source(Register, Offset); - MCCFIInstruction Ret(RelMove, L, Dest, Source, ""); + MCCFIInstruction Ret(OpRelOffset, L, Dest, Source, ""); return Ret; } @@ -359,13 +359,13 @@ namespace llvm { createAdjustCfaOffset(MCSymbol *L, int Adjustment) { MachineLocation Dest(MachineLocation::VirtualFP); MachineLocation Source(MachineLocation::VirtualFP, Adjustment); - MCCFIInstruction Ret(RelMove, L, Dest, Source, ""); + MCCFIInstruction Ret(OpAdjustCfaOffset, L, Dest, Source, ""); return Ret; } static MCCFIInstruction createEscape(MCSymbol *L, StringRef Vals) { MachineLocation Dummy; - MCCFIInstruction Ret(Escape, L, Dummy, Dummy, Vals); + MCCFIInstruction Ret(OpEscape, L, Dummy, Dummy, Vals); return Ret; } diff --git a/llvm/lib/MC/MCDwarf.cpp b/llvm/lib/MC/MCDwarf.cpp index c9b21e3..46d00dc 100644 --- a/llvm/lib/MC/MCDwarf.cpp +++ b/llvm/lib/MC/MCDwarf.cpp @@ -938,7 +938,7 @@ void FrameEmitterImpl::EmitCFIInstruction(MCStreamer &Streamer, bool VerboseAsm = Streamer.isVerboseAsm(); switch (Instr.getOperation()) { - case MCCFIInstruction::Undefined: { + case MCCFIInstruction::OpUndefined: { unsigned Reg = Instr.getDestination().getReg(); if (VerboseAsm) { Streamer.AddComment("DW_CFA_undefined"); @@ -948,43 +948,68 @@ void FrameEmitterImpl::EmitCFIInstruction(MCStreamer &Streamer, Streamer.EmitULEB128IntValue(Reg); return; } - case MCCFIInstruction::Move: - case MCCFIInstruction::RelMove: { - const MachineLocation &Dst = Instr.getDestination(); + case MCCFIInstruction::OpAdjustCfaOffset: + case MCCFIInstruction::OpDefCfaOffset: { const MachineLocation &Src = Instr.getSource(); - const bool IsRelative = Instr.getOperation() == MCCFIInstruction::RelMove; - - // If advancing cfa. - if (Dst.isReg() && Dst.getReg() == MachineLocation::VirtualFP) { - if (Src.getReg() == MachineLocation::VirtualFP) { - if (VerboseAsm) Streamer.AddComment("DW_CFA_def_cfa_offset"); - Streamer.EmitIntValue(dwarf::DW_CFA_def_cfa_offset, 1); - } else { - if (VerboseAsm) Streamer.AddComment("DW_CFA_def_cfa"); - Streamer.EmitIntValue(dwarf::DW_CFA_def_cfa, 1); - if (VerboseAsm) Streamer.AddComment(Twine("Reg ") + - Twine(Src.getReg())); - Streamer.EmitULEB128IntValue(Src.getReg()); - } + const bool IsRelative = + Instr.getOperation() == MCCFIInstruction::OpAdjustCfaOffset; - if (IsRelative) - CFAOffset += Src.getOffset(); - else - CFAOffset = -Src.getOffset(); + if (VerboseAsm) + Streamer.AddComment("DW_CFA_def_cfa_offset"); + Streamer.EmitIntValue(dwarf::DW_CFA_def_cfa_offset, 1); - if (VerboseAsm) Streamer.AddComment(Twine("Offset " + Twine(CFAOffset))); - Streamer.EmitULEB128IntValue(CFAOffset); - return; - } + if (IsRelative) + CFAOffset += Src.getOffset(); + else + CFAOffset = -Src.getOffset(); - if (Src.isReg() && Src.getReg() == MachineLocation::VirtualFP) { - assert(Dst.isReg() && "Machine move not supported yet."); - if (VerboseAsm) Streamer.AddComment("DW_CFA_def_cfa_register"); - Streamer.EmitIntValue(dwarf::DW_CFA_def_cfa_register, 1); - if (VerboseAsm) Streamer.AddComment(Twine("Reg ") + Twine(Dst.getReg())); - Streamer.EmitULEB128IntValue(Dst.getReg()); - return; - } + if (VerboseAsm) + Streamer.AddComment(Twine("Offset " + Twine(CFAOffset))); + Streamer.EmitULEB128IntValue(CFAOffset); + + return; + } + case MCCFIInstruction::OpDefCfa: { + const MachineLocation &Src = Instr.getSource(); + + if (VerboseAsm) + Streamer.AddComment("DW_CFA_def_cfa"); + Streamer.EmitIntValue(dwarf::DW_CFA_def_cfa, 1); + + if (VerboseAsm) + Streamer.AddComment(Twine("Reg ") + Twine(Src.getReg())); + Streamer.EmitULEB128IntValue(Src.getReg()); + + CFAOffset = -Src.getOffset(); + + if (VerboseAsm) + Streamer.AddComment(Twine("Offset " + Twine(CFAOffset))); + Streamer.EmitULEB128IntValue(CFAOffset); + + return; + } + + case MCCFIInstruction::OpDefCfaRegister: { + const MachineLocation &Dst = Instr.getDestination(); + + assert(Dst.isReg() && "Machine move not supported yet."); + if (VerboseAsm) + Streamer.AddComment("DW_CFA_def_cfa_register"); + Streamer.EmitIntValue(dwarf::DW_CFA_def_cfa_register, 1); + + if (VerboseAsm) + Streamer.AddComment(Twine("Reg ") + Twine(Dst.getReg())); + Streamer.EmitULEB128IntValue(Dst.getReg()); + + return; + } + + case MCCFIInstruction::OpOffset: + case MCCFIInstruction::OpRelOffset: { + const MachineLocation &Dst = Instr.getDestination(); + const MachineLocation &Src = Instr.getSource(); + const bool IsRelative = + Instr.getOperation() == MCCFIInstruction::OpRelOffset; unsigned Reg = Src.getReg(); int Offset = Dst.getOffset(); @@ -1015,15 +1040,15 @@ void FrameEmitterImpl::EmitCFIInstruction(MCStreamer &Streamer, } return; } - case MCCFIInstruction::RememberState: + case MCCFIInstruction::OpRememberState: if (VerboseAsm) Streamer.AddComment("DW_CFA_remember_state"); Streamer.EmitIntValue(dwarf::DW_CFA_remember_state, 1); return; - case MCCFIInstruction::RestoreState: + case MCCFIInstruction::OpRestoreState: if (VerboseAsm) Streamer.AddComment("DW_CFA_restore_state"); Streamer.EmitIntValue(dwarf::DW_CFA_restore_state, 1); return; - case MCCFIInstruction::SameValue: { + case MCCFIInstruction::OpSameValue: { unsigned Reg = Instr.getDestination().getReg(); if (VerboseAsm) Streamer.AddComment("DW_CFA_same_value"); Streamer.EmitIntValue(dwarf::DW_CFA_same_value, 1); @@ -1031,7 +1056,7 @@ void FrameEmitterImpl::EmitCFIInstruction(MCStreamer &Streamer, Streamer.EmitULEB128IntValue(Reg); return; } - case MCCFIInstruction::Restore: { + case MCCFIInstruction::OpRestore: { unsigned Reg = Instr.getDestination().getReg(); if (VerboseAsm) { Streamer.AddComment("DW_CFA_restore"); @@ -1040,7 +1065,7 @@ void FrameEmitterImpl::EmitCFIInstruction(MCStreamer &Streamer, Streamer.EmitIntValue(dwarf::DW_CFA_restore | Reg, 1); return; } - case MCCFIInstruction::Escape: + case MCCFIInstruction::OpEscape: if (VerboseAsm) Streamer.AddComment("Escape bytes"); Streamer.EmitBytes(Instr.getValues(), 0); return; @@ -1276,7 +1301,7 @@ const MCSymbol &FrameEmitterImpl::EmitCIE(MCStreamer &streamer, unsigned Reg = Src.getReg(); int Offset = Dst.getOffset(); MCCFIInstruction Inst = - MCCFIInstruction::createCFIOffset(Label, Reg, Offset); + MCCFIInstruction::createOffset(Label, Reg, Offset); Instructions.push_back(Inst); } } diff --git a/llvm/lib/MC/MCStreamer.cpp b/llvm/lib/MC/MCStreamer.cpp index a771800..4f6b623 100644 --- a/llvm/lib/MC/MCStreamer.cpp +++ b/llvm/lib/MC/MCStreamer.cpp @@ -276,7 +276,7 @@ void MCStreamer::EmitCFIDefCfaRegister(int64_t Register) { void MCStreamer::EmitCFIOffset(int64_t Register, int64_t Offset) { MCSymbol *Label = EmitCFICommon(); MCCFIInstruction Instruction = - MCCFIInstruction::createCFIOffset(Label, Register, Offset); + MCCFIInstruction::createOffset(Label, Register, Offset); MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo(); CurFrame->Instructions.push_back(Instruction); }