mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-08-30 21:29:28 +00:00
into their new header subdirectory: include/llvm/IR. This matches the directory structure of lib, and begins to correct a long standing point of file layout clutter in LLVM. There are still more header files to move here, but I wanted to handle them in separate commits to make tracking what files make sense at each layer easier. The only really questionable files here are the target intrinsic tablegen files. But that's a battle I'd rather not fight today. I've updated both CMake and Makefile build systems (I think, and my tests think, but I may have missed something). I've also re-sorted the includes throughout the project. I'll be committing updates to Clang, DragonEgg, and Polly momentarily. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171366 91177308-0d34-0410-b5e6-96231b3b80d8
157 lines
5.2 KiB
C++
157 lines
5.2 KiB
C++
//===-- CodeGen/AsmPrinter/DwarfException.cpp - Dwarf Exception Impl ------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file contains support for writing DWARF exception info into asm files.
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//
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//===----------------------------------------------------------------------===//
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#include "DwarfException.h"
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#include "llvm/ADT/SmallString.h"
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#include "llvm/ADT/StringExtras.h"
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#include "llvm/ADT/Twine.h"
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#include "llvm/CodeGen/AsmPrinter.h"
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#include "llvm/CodeGen/MachineFrameInfo.h"
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#include "llvm/CodeGen/MachineFunction.h"
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#include "llvm/CodeGen/MachineModuleInfo.h"
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#include "llvm/IR/DataLayout.h"
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#include "llvm/IR/Module.h"
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#include "llvm/MC/MCAsmInfo.h"
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#include "llvm/MC/MCContext.h"
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#include "llvm/MC/MCExpr.h"
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#include "llvm/MC/MCSection.h"
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#include "llvm/MC/MCStreamer.h"
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#include "llvm/MC/MCSymbol.h"
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#include "llvm/MC/MachineLocation.h"
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#include "llvm/Support/Dwarf.h"
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#include "llvm/Support/ErrorHandling.h"
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#include "llvm/Support/FormattedStream.h"
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#include "llvm/Target/Mangler.h"
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#include "llvm/Target/TargetFrameLowering.h"
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#include "llvm/Target/TargetLoweringObjectFile.h"
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#include "llvm/Target/TargetMachine.h"
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#include "llvm/Target/TargetOptions.h"
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#include "llvm/Target/TargetRegisterInfo.h"
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using namespace llvm;
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DwarfCFIException::DwarfCFIException(AsmPrinter *A)
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: DwarfException(A),
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shouldEmitPersonality(false), shouldEmitLSDA(false), shouldEmitMoves(false),
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moveTypeModule(AsmPrinter::CFI_M_None) {}
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DwarfCFIException::~DwarfCFIException() {}
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/// EndModule - Emit all exception information that should come after the
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/// content.
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void DwarfCFIException::EndModule() {
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if (moveTypeModule == AsmPrinter::CFI_M_Debug)
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Asm->OutStreamer.EmitCFISections(false, true);
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if (!Asm->MAI->isExceptionHandlingDwarf())
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return;
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const TargetLoweringObjectFile &TLOF = Asm->getObjFileLowering();
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unsigned PerEncoding = TLOF.getPersonalityEncoding();
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if ((PerEncoding & 0x70) != dwarf::DW_EH_PE_pcrel)
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return;
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// Emit references to all used personality functions
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bool AtLeastOne = false;
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const std::vector<const Function*> &Personalities = MMI->getPersonalities();
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for (size_t i = 0, e = Personalities.size(); i != e; ++i) {
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if (!Personalities[i])
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continue;
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MCSymbol *Sym = Asm->Mang->getSymbol(Personalities[i]);
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TLOF.emitPersonalityValue(Asm->OutStreamer, Asm->TM, Sym);
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AtLeastOne = true;
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}
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if (AtLeastOne && !TLOF.isFunctionEHFrameSymbolPrivate()) {
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// This is a temporary hack to keep sections in the same order they
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// were before. This lets us produce bit identical outputs while
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// transitioning to CFI.
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Asm->OutStreamer.SwitchSection(
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const_cast<TargetLoweringObjectFile&>(TLOF).getEHFrameSection());
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}
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}
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/// BeginFunction - Gather pre-function exception information. Assumes it's
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/// being emitted immediately after the function entry point.
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void DwarfCFIException::BeginFunction(const MachineFunction *MF) {
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shouldEmitMoves = shouldEmitPersonality = shouldEmitLSDA = false;
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// If any landing pads survive, we need an EH table.
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bool hasLandingPads = !MMI->getLandingPads().empty();
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// See if we need frame move info.
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AsmPrinter::CFIMoveType MoveType = Asm->needsCFIMoves();
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if (MoveType == AsmPrinter::CFI_M_EH ||
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(MoveType == AsmPrinter::CFI_M_Debug &&
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moveTypeModule == AsmPrinter::CFI_M_None))
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moveTypeModule = MoveType;
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shouldEmitMoves = MoveType != AsmPrinter::CFI_M_None;
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const TargetLoweringObjectFile &TLOF = Asm->getObjFileLowering();
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unsigned PerEncoding = TLOF.getPersonalityEncoding();
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const Function *Per = MMI->getPersonalities()[MMI->getPersonalityIndex()];
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shouldEmitPersonality = hasLandingPads &&
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PerEncoding != dwarf::DW_EH_PE_omit && Per;
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unsigned LSDAEncoding = TLOF.getLSDAEncoding();
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shouldEmitLSDA = shouldEmitPersonality &&
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LSDAEncoding != dwarf::DW_EH_PE_omit;
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if (!shouldEmitPersonality && !shouldEmitMoves)
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return;
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Asm->OutStreamer.EmitCFIStartProc();
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// Indicate personality routine, if any.
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if (!shouldEmitPersonality)
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return;
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const MCSymbol *Sym = TLOF.getCFIPersonalitySymbol(Per, Asm->Mang, MMI);
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Asm->OutStreamer.EmitCFIPersonality(Sym, PerEncoding);
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Asm->OutStreamer.EmitDebugLabel
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(Asm->GetTempSymbol("eh_func_begin",
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Asm->getFunctionNumber()));
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// Provide LSDA information.
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if (!shouldEmitLSDA)
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return;
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Asm->OutStreamer.EmitCFILsda(Asm->GetTempSymbol("exception",
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Asm->getFunctionNumber()),
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LSDAEncoding);
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}
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/// EndFunction - Gather and emit post-function exception information.
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///
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void DwarfCFIException::EndFunction() {
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if (!shouldEmitPersonality && !shouldEmitMoves)
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return;
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Asm->OutStreamer.EmitCFIEndProc();
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if (!shouldEmitPersonality)
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return;
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Asm->OutStreamer.EmitLabel(Asm->GetTempSymbol("eh_func_end",
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Asm->getFunctionNumber()));
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// Map all labels and get rid of any dead landing pads.
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MMI->TidyLandingPads();
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EmitExceptionTable();
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}
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