//
//===----------------------------------------------------------------------===//
-#define DEBUG_TYPE "asm-printer"
#include "llvm/CodeGen/AsmPrinter.h"
#include "DwarfDebug.h"
#include "DwarfException.h"
-#include "llvm/ADT/SmallBitVector.h"
+#include "WinCodeViewLineTables.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/ADT/Statistic.h"
#include "llvm/Analysis/ConstantFolding.h"
+#include "llvm/Analysis/JumpInstrTableInfo.h"
#include "llvm/CodeGen/GCMetadataPrinter.h"
#include "llvm/CodeGen/MachineConstantPool.h"
#include "llvm/CodeGen/MachineFrameInfo.h"
#include "llvm/CodeGen/MachineJumpTableInfo.h"
#include "llvm/CodeGen/MachineLoopInfo.h"
#include "llvm/CodeGen/MachineModuleInfo.h"
-#include "llvm/DebugInfo.h"
#include "llvm/IR/DataLayout.h"
+#include "llvm/IR/DebugInfo.h"
#include "llvm/IR/Mangler.h"
#include "llvm/IR/Module.h"
#include "llvm/IR/Operator.h"
#include "llvm/Target/TargetInstrInfo.h"
#include "llvm/Target/TargetLowering.h"
#include "llvm/Target/TargetLoweringObjectFile.h"
-#include "llvm/Target/TargetOptions.h"
#include "llvm/Target/TargetRegisterInfo.h"
#include "llvm/Target/TargetSubtargetInfo.h"
#include "llvm/Transforms/Utils/GlobalStatus.h"
-#include "WinCodeViewLineTables.h"
using namespace llvm;
+#define DEBUG_TYPE "asm-printer"
+
static const char *const DWARFGroupName = "DWARF Emission";
static const char *const DbgTimerName = "Debug Info Emission";
static const char *const EHTimerName = "DWARF Exception Writer";
char AsmPrinter::ID = 0;
-typedef DenseMap<GCStrategy*,GCMetadataPrinter*> gcp_map_type;
+typedef DenseMap<GCStrategy*, std::unique_ptr<GCMetadataPrinter>> gcp_map_type;
static gcp_map_type &getGCMap(void *&P) {
- if (P == 0)
+ if (!P)
P = new gcp_map_type();
return *(gcp_map_type*)P;
}
TM(tm), MAI(tm.getMCAsmInfo()), MII(tm.getInstrInfo()),
OutContext(Streamer.getContext()),
OutStreamer(Streamer),
- LastMI(0), LastFn(0), Counter(~0U), SetCounter(0) {
- DD = 0; MMI = 0; LI = 0; MF = 0;
- CurrentFnSym = CurrentFnSymForSize = 0;
- GCMetadataPrinters = 0;
+ LastMI(nullptr), LastFn(0), Counter(~0U), SetCounter(0) {
+ DD = nullptr; MMI = nullptr; LI = nullptr; MF = nullptr;
+ CurrentFnSym = CurrentFnSymForSize = nullptr;
+ GCMetadataPrinters = nullptr;
VerboseAsm = Streamer.isVerboseAsm();
}
AsmPrinter::~AsmPrinter() {
- assert(DD == 0 && Handlers.empty() && "Debug/EH info didn't get finalized");
+ assert(!DD && Handlers.empty() && "Debug/EH info didn't get finalized");
- if (GCMetadataPrinters != 0) {
+ if (GCMetadataPrinters) {
gcp_map_type &GCMap = getGCMap(GCMetadataPrinters);
- for (gcp_map_type::iterator I = GCMap.begin(), E = GCMap.end(); I != E; ++I)
- delete I->second;
delete &GCMap;
- GCMetadataPrinters = 0;
+ GCMetadataPrinters = nullptr;
}
delete &OutStreamer;
const_cast<TargetLoweringObjectFile&>(getObjFileLowering())
.Initialize(OutContext, TM);
- OutStreamer.InitSections(false);
+ OutStreamer.InitSections();
Mang = new Mangler(TM.getDataLayout());
+ // Emit the version-min deplyment target directive if needed.
+ //
+ // FIXME: If we end up with a collection of these sorts of Darwin-specific
+ // or ELF-specific things, it may make sense to have a platform helper class
+ // that will work with the target helper class. For now keep it here, as the
+ // alternative is duplicated code in each of the target asm printers that
+ // use the directive, where it would need the same conditionalization
+ // anyway.
+ Triple TT(getTargetTriple());
+ if (TT.isOSDarwin()) {
+ unsigned Major, Minor, Update;
+ TT.getOSVersion(Major, Minor, Update);
+ // If there is a version specified, Major will be non-zero.
+ if (Major)
+ OutStreamer.EmitVersionMin((TT.isMacOSX() ?
+ MCVM_OSXVersionMin : MCVM_IOSVersionMin),
+ Major, Minor, Update);
+ }
+
// Allow the target to emit any magic that it wants at the start of the file.
EmitStartOfAsmFile(M);
GCModuleInfo *MI = getAnalysisIfAvailable<GCModuleInfo>();
assert(MI && "AsmPrinter didn't require GCModuleInfo?");
- for (GCModuleInfo::iterator I = MI->begin(), E = MI->end(); I != E; ++I)
+ for (auto &I : *MI)
if (GCMetadataPrinter *MP = GetOrCreateGCPrinter(*I))
MP->beginAssembly(*this);
}
if (MAI->doesSupportDebugInformation()) {
- if (Triple(TM.getTargetTriple()).getOS() == Triple::Win32) {
+ if (Triple(TM.getTargetTriple()).isKnownWindowsMSVCEnvironment()) {
Handlers.push_back(HandlerInfo(new WinCodeViewLineTables(this),
DbgTimerName,
CodeViewLineTablesGroupName));
}
}
- DwarfException *DE = 0;
+ EHStreamer *ES = nullptr;
switch (MAI->getExceptionHandlingType()) {
case ExceptionHandling::None:
break;
case ExceptionHandling::SjLj:
case ExceptionHandling::DwarfCFI:
- DE = new DwarfCFIException(this);
+ ES = new DwarfCFIException(this);
break;
case ExceptionHandling::ARM:
- DE = new ARMException(this);
+ ES = new ARMException(this);
break;
- case ExceptionHandling::Win64:
- DE = new Win64Exception(this);
+ case ExceptionHandling::WinEH:
+ ES = new Win64Exception(this);
break;
}
- if (DE)
- Handlers.push_back(HandlerInfo(DE, EHTimerName, DWARFGroupName));
+ if (ES)
+ Handlers.push_back(HandlerInfo(ES, EHTimerName, DWARFGroupName));
return false;
}
case GlobalValue::LinkOnceODRLinkage:
case GlobalValue::WeakAnyLinkage:
case GlobalValue::WeakODRLinkage:
- case GlobalValue::LinkerPrivateWeakLinkage:
if (MAI->hasWeakDefDirective()) {
// .globl _foo
OutStreamer.EmitSymbolAttribute(GVSym, MCSA_Global);
return;
case GlobalValue::PrivateLinkage:
case GlobalValue::InternalLinkage:
- case GlobalValue::LinkerPrivateLinkage:
return;
case GlobalValue::AvailableExternallyLinkage:
llvm_unreachable("Should never emit this");
// sections and expected to be contiguous (e.g. ObjC metadata).
unsigned AlignLog = getGVAlignmentLog2(GV, *DL);
- for (unsigned I = 0, E = Handlers.size(); I != E; ++I) {
- const HandlerInfo &OI = Handlers[I];
- NamedRegionTimer T(OI.TimerName, OI.TimerGroupName, TimePassesIsEnabled);
- OI.Handler->setSymbolSize(GVSym, Size);
+ for (const HandlerInfo &HI : Handlers) {
+ NamedRegionTimer T(HI.TimerName, HI.TimerGroupName, TimePassesIsEnabled);
+ HI.Handler->setSymbolSize(GVSym, Size);
}
// Handle common and BSS local symbols (.lcomm).
}
// Emit pre-function debug and/or EH information.
- for (unsigned I = 0, E = Handlers.size(); I != E; ++I) {
- const HandlerInfo &OI = Handlers[I];
- NamedRegionTimer T(OI.TimerName, OI.TimerGroupName, TimePassesIsEnabled);
- OI.Handler->beginFunction(MF);
+ for (const HandlerInfo &HI : Handlers) {
+ NamedRegionTimer T(HI.TimerName, HI.TimerGroupName, TimePassesIsEnabled);
+ HI.Handler->beginFunction(MF);
}
// Emit the prefix data.
}
bool AsmPrinter::needsSEHMoves() {
- return MAI->getExceptionHandlingType() == ExceptionHandling::Win64 &&
+ return MAI->getExceptionHandlingType() == ExceptionHandling::WinEH &&
MF->getFunction()->needsUnwindTableEntry();
}
-void AsmPrinter::emitPrologLabel(const MachineInstr &MI) {
- const MCSymbol *Label = MI.getOperand(0).getMCSymbol();
-
- ExceptionHandling::ExceptionsType ExceptionHandlingType =
- MAI->getExceptionHandlingType();
+void AsmPrinter::emitCFIInstruction(const MachineInstr &MI) {
+ ExceptionHandling ExceptionHandlingType = MAI->getExceptionHandlingType();
if (ExceptionHandlingType != ExceptionHandling::DwarfCFI &&
ExceptionHandlingType != ExceptionHandling::ARM)
return;
const MachineModuleInfo &MMI = MF->getMMI();
const std::vector<MCCFIInstruction> &Instrs = MMI.getFrameInstructions();
- bool FoundOne = false;
- (void)FoundOne;
- for (std::vector<MCCFIInstruction>::const_iterator I = Instrs.begin(),
- E = Instrs.end(); I != E; ++I) {
- if (I->getLabel() == Label) {
- emitCFIInstruction(*I);
- FoundOne = true;
- }
- }
- assert(FoundOne);
+ unsigned CFIIndex = MI.getOperand(0).getCFIIndex();
+ const MCCFIInstruction &CFI = Instrs[CFIIndex];
+ emitCFIInstruction(CFI);
}
/// EmitFunctionBody - This method emits the body and trailer for a
// Print out code for the function.
bool HasAnyRealCode = false;
- const MachineInstr *LastMI = 0;
- for (MachineFunction::const_iterator I = MF->begin(), E = MF->end();
- I != E; ++I) {
+ const MachineInstr *LastMI = nullptr;
+ for (auto &MBB : *MF) {
// Print a label for the basic block.
- EmitBasicBlockStart(I);
- for (MachineBasicBlock::const_iterator II = I->begin(), IE = I->end();
- II != IE; ++II) {
- LastMI = II;
+ EmitBasicBlockStart(MBB);
+ for (auto &MI : MBB) {
+ LastMI = &MI;
// Print the assembly for the instruction.
- if (!II->isLabel() && !II->isImplicitDef() && !II->isKill() &&
- !II->isDebugValue()) {
+ if (!MI.isPosition() && !MI.isImplicitDef() && !MI.isKill() &&
+ !MI.isDebugValue()) {
HasAnyRealCode = true;
++EmittedInsts;
}
if (ShouldPrintDebugScopes) {
- for (unsigned III = 0, EEE = Handlers.size(); III != EEE; ++III) {
- const HandlerInfo &OI = Handlers[III];
- NamedRegionTimer T(OI.TimerName, OI.TimerGroupName,
+ for (const HandlerInfo &HI : Handlers) {
+ NamedRegionTimer T(HI.TimerName, HI.TimerGroupName,
TimePassesIsEnabled);
- OI.Handler->beginInstruction(II);
+ HI.Handler->beginInstruction(&MI);
}
}
if (isVerbose())
- emitComments(*II, OutStreamer.GetCommentOS());
+ emitComments(MI, OutStreamer.GetCommentOS());
- switch (II->getOpcode()) {
- case TargetOpcode::PROLOG_LABEL:
- emitPrologLabel(*II);
+ switch (MI.getOpcode()) {
+ case TargetOpcode::CFI_INSTRUCTION:
+ emitCFIInstruction(MI);
break;
case TargetOpcode::EH_LABEL:
case TargetOpcode::GC_LABEL:
- OutStreamer.EmitLabel(II->getOperand(0).getMCSymbol());
+ OutStreamer.EmitLabel(MI.getOperand(0).getMCSymbol());
break;
case TargetOpcode::INLINEASM:
- EmitInlineAsm(II);
+ EmitInlineAsm(&MI);
break;
case TargetOpcode::DBG_VALUE:
if (isVerbose()) {
- if (!emitDebugValueComment(II, *this))
- EmitInstruction(II);
+ if (!emitDebugValueComment(&MI, *this))
+ EmitInstruction(&MI);
}
break;
case TargetOpcode::IMPLICIT_DEF:
- if (isVerbose()) emitImplicitDef(II);
+ if (isVerbose()) emitImplicitDef(&MI);
break;
case TargetOpcode::KILL:
- if (isVerbose()) emitKill(II, *this);
+ if (isVerbose()) emitKill(&MI, *this);
break;
default:
- EmitInstruction(II);
+ EmitInstruction(&MI);
break;
}
if (ShouldPrintDebugScopes) {
- for (unsigned III = 0, EEE = Handlers.size(); III != EEE; ++III) {
- const HandlerInfo &OI = Handlers[III];
- NamedRegionTimer T(OI.TimerName, OI.TimerGroupName,
+ for (const HandlerInfo &HI : Handlers) {
+ NamedRegionTimer T(HI.TimerName, HI.TimerGroupName,
TimePassesIsEnabled);
- OI.Handler->endInstruction();
+ HI.Handler->endInstruction();
}
}
}
+
+ EmitBasicBlockEnd(MBB);
}
// If the last instruction was a prolog label, then we have a situation where
// label equaling the end of function label and an invalid "row" in the
// FDE. We need to emit a noop in this situation so that the FDE's rows are
// valid.
- bool RequiresNoop = LastMI && LastMI->isPrologLabel();
+ bool RequiresNoop = LastMI && LastMI->isCFIInstruction();
// If the function is empty and the object file uses .subsections_via_symbols,
// then we need to emit *something* to the function body to prevent the
}
const Function *F = MF->getFunction();
- for (Function::const_iterator i = F->begin(), e = F->end(); i != e; ++i) {
- const BasicBlock *BB = i;
- if (!BB->hasAddressTaken())
+ for (const auto &BB : *F) {
+ if (!BB.hasAddressTaken())
continue;
- MCSymbol *Sym = GetBlockAddressSymbol(BB);
+ MCSymbol *Sym = GetBlockAddressSymbol(&BB);
if (Sym->isDefined())
continue;
OutStreamer.AddComment("Address of block that was removed by CodeGen");
}
// Emit post-function debug and/or EH information.
- for (unsigned I = 0, E = Handlers.size(); I != E; ++I) {
- const HandlerInfo &OI = Handlers[I];
- NamedRegionTimer T(OI.TimerName, OI.TimerGroupName, TimePassesIsEnabled);
- OI.Handler->endFunction(MF);
+ for (const HandlerInfo &HI : Handlers) {
+ NamedRegionTimer T(HI.TimerName, HI.TimerGroupName, TimePassesIsEnabled);
+ HI.Handler->endFunction(MF);
}
MMI->EndFunction();
OutStreamer.AddBlankLine();
}
-/// Emit a dwarf register operation.
-static void emitDwarfRegOp(const AsmPrinter &AP, int Reg) {
- assert(Reg >= 0);
- if (Reg < 32) {
- AP.OutStreamer.AddComment(dwarf::
- OperationEncodingString(dwarf::DW_OP_reg0 + Reg));
- AP.EmitInt8(dwarf::DW_OP_reg0 + Reg);
- } else {
- AP.OutStreamer.AddComment("DW_OP_regx");
- AP.EmitInt8(dwarf::DW_OP_regx);
- AP.OutStreamer.AddComment(Twine(Reg));
- AP.EmitULEB128(Reg);
- }
-}
-
-/// Emit an (double-)indirect dwarf register operation.
-static void emitDwarfRegOpIndirect(const AsmPrinter &AP,
- int Reg, int Offset, bool Deref) {
- assert(Reg >= 0);
- if (Reg < 32) {
- AP.OutStreamer.AddComment(dwarf::
- OperationEncodingString(dwarf::DW_OP_breg0 + Reg));
- AP.EmitInt8(dwarf::DW_OP_breg0 + Reg);
- } else {
- AP.OutStreamer.AddComment("DW_OP_bregx");
- AP.EmitInt8(dwarf::DW_OP_bregx);
- AP.OutStreamer.AddComment(Twine(Reg));
- AP.EmitULEB128(Reg);
- }
- AP.EmitSLEB128(Offset);
- if (Deref)
- AP.EmitInt8(dwarf::DW_OP_deref);
-}
-
-/// Emit a dwarf register operation for describing
-/// - a small value occupying only part of a register or
-/// - a small register representing only part of a value.
-static void emitDwarfOpPiece(const AsmPrinter &AP,
- unsigned Size, unsigned Offset) {
- assert(Size > 0);
- if (Offset > 0) {
- AP.OutStreamer.AddComment("DW_OP_bit_piece");
- AP.EmitInt8(dwarf::DW_OP_bit_piece);
- AP.OutStreamer.AddComment(Twine(Size));
- AP.EmitULEB128(Size);
- AP.OutStreamer.AddComment(Twine(Offset));
- AP.EmitULEB128(Offset);
- } else {
- AP.OutStreamer.AddComment("DW_OP_piece");
- AP.EmitInt8(dwarf::DW_OP_piece);
- unsigned ByteSize = Size / 8; // Assuming 8 bits per byte.
- AP.OutStreamer.AddComment(Twine(ByteSize));
- AP.EmitULEB128(ByteSize);
- }
-}
-
-/// Some targets do not provide a DWARF register number for every
-/// register. This function attempts to emit a dwarf register by
-/// emitting a piece of a super-register or by piecing together
-/// multiple subregisters that alias the register.
-static void EmitDwarfRegOpPiece(const AsmPrinter &AP,
- const MachineLocation &MLoc) {
- assert(!MLoc.isIndirect());
- const TargetRegisterInfo *TRI = AP.TM.getRegisterInfo();
- int Reg = TRI->getDwarfRegNum(MLoc.getReg(), false);
-
- // Walk up the super-register chain until we find a valid number.
- // For example, EAX on x86_64 is a 32-bit piece of RAX with offset 0.
- for (MCSuperRegIterator SR(MLoc.getReg(), TRI); SR.isValid(); ++SR) {
- Reg = TRI->getDwarfRegNum(*SR, false);
- if (Reg >= 0) {
- unsigned Idx = TRI->getSubRegIndex(*SR, MLoc.getReg());
- unsigned Size = TRI->getSubRegIdxSize(Idx);
- unsigned Offset = TRI->getSubRegIdxOffset(Idx);
- AP.OutStreamer.AddComment("super-register");
- emitDwarfRegOp(AP, Reg);
- emitDwarfOpPiece(AP, Size, Offset);
- return;
- }
- }
-
- // Otherwise, attempt to find a covering set of sub-register numbers.
- // For example, Q0 on ARM is a composition of D0+D1.
- //
- // Keep track of the current position so we can emit the more
- // efficient DW_OP_piece.
- unsigned CurPos = 0;
- // The size of the register in bits, assuming 8 bits per byte.
- unsigned RegSize = TRI->getMinimalPhysRegClass(MLoc.getReg())->getSize()*8;
- // Keep track of the bits in the register we already emitted, so we
- // can avoid emitting redundant aliasing subregs.
- SmallBitVector Coverage(RegSize, false);
- for (MCSubRegIterator SR(MLoc.getReg(), TRI); SR.isValid(); ++SR) {
- unsigned Idx = TRI->getSubRegIndex(MLoc.getReg(), *SR);
- unsigned Size = TRI->getSubRegIdxSize(Idx);
- unsigned Offset = TRI->getSubRegIdxOffset(Idx);
- Reg = TRI->getDwarfRegNum(*SR, false);
-
- // Intersection between the bits we already emitted and the bits
- // covered by this subregister.
- SmallBitVector Intersection(RegSize, false);
- Intersection.set(Offset, Offset+Size);
- Intersection ^= Coverage;
-
- // If this sub-register has a DWARF number and we haven't covered
- // its range, emit a DWARF piece for it.
- if (Reg >= 0 && Intersection.any()) {
- AP.OutStreamer.AddComment("sub-register");
- emitDwarfRegOp(AP, Reg);
- emitDwarfOpPiece(AP, Size, Offset == CurPos ? 0 : Offset);
- CurPos = Offset+Size;
-
- // Mark it as emitted.
- Coverage.set(Offset, Offset+Size);
- }
- }
-
- if (CurPos == 0) {
- // FIXME: We have no reasonable way of handling errors in here.
- AP.OutStreamer.AddComment("nop (could not find a dwarf register number)");
- AP.EmitInt8(dwarf::DW_OP_nop);
- }
-}
-
-/// EmitDwarfRegOp - Emit dwarf register operation.
-void AsmPrinter::EmitDwarfRegOp(const MachineLocation &MLoc,
- bool Indirect) const {
- const TargetRegisterInfo *TRI = TM.getRegisterInfo();
- int Reg = TRI->getDwarfRegNum(MLoc.getReg(), false);
- if (Reg < 0) {
- // We assume that pointers are always in an addressable register.
- if (Indirect || MLoc.isIndirect()) {
- // FIXME: We have no reasonable way of handling errors in here. The
- // caller might be in the middle of a dwarf expression. We should
- // probably assert that Reg >= 0 once debug info generation is more mature.
- OutStreamer.AddComment("nop (invalid dwarf register number for indirect loc)");
- EmitInt8(dwarf::DW_OP_nop);
- return;
- }
-
- // Attempt to find a valid super- or sub-register.
- if (!Indirect && !MLoc.isIndirect())
- return EmitDwarfRegOpPiece(*this, MLoc);
- }
-
- if (MLoc.isIndirect())
- emitDwarfRegOpIndirect(*this, Reg, MLoc.getOffset(), Indirect);
- else if (Indirect)
- emitDwarfRegOpIndirect(*this, Reg, 0, false);
- else
- emitDwarfRegOp(*this, Reg);
-}
+static const MCExpr *lowerConstant(const Constant *CV, AsmPrinter &AP);
bool AsmPrinter::doFinalization(Module &M) {
// Emit global variables.
- for (Module::const_global_iterator I = M.global_begin(), E = M.global_end();
- I != E; ++I)
- EmitGlobalVariable(I);
+ for (const auto &G : M.globals())
+ EmitGlobalVariable(&G);
// Emit visibility info for declarations
- for (Module::const_iterator I = M.begin(), E = M.end(); I != E; ++I) {
- const Function &F = *I;
+ for (const Function &F : M) {
if (!F.isDeclaration())
continue;
GlobalValue::VisibilityTypes V = F.getVisibility();
EmitVisibility(Name, V, false);
}
+ // Get information about jump-instruction tables to print.
+ JumpInstrTableInfo *JITI = getAnalysisIfAvailable<JumpInstrTableInfo>();
+
+ if (JITI && !JITI->getTables().empty()) {
+ unsigned Arch = Triple(getTargetTriple()).getArch();
+ bool IsThumb = (Arch == Triple::thumb || Arch == Triple::thumbeb);
+ MCInst TrapInst;
+ TM.getInstrInfo()->getTrap(TrapInst);
+ for (const auto &KV : JITI->getTables()) {
+ uint64_t Count = 0;
+ for (const auto &FunPair : KV.second) {
+ // Emit the function labels to make this be a function entry point.
+ MCSymbol *FunSym =
+ OutContext.GetOrCreateSymbol(FunPair.second->getName());
+ OutStreamer.EmitSymbolAttribute(FunSym, MCSA_Global);
+ // FIXME: JumpTableInstrInfo should store information about the required
+ // alignment of table entries and the size of the padding instruction.
+ EmitAlignment(3);
+ if (IsThumb)
+ OutStreamer.EmitThumbFunc(FunSym);
+ if (MAI->hasDotTypeDotSizeDirective())
+ OutStreamer.EmitSymbolAttribute(FunSym, MCSA_ELF_TypeFunction);
+ OutStreamer.EmitLabel(FunSym);
+
+ // Emit the jump instruction to transfer control to the original
+ // function.
+ MCInst JumpToFun;
+ MCSymbol *TargetSymbol =
+ OutContext.GetOrCreateSymbol(FunPair.first->getName());
+ const MCSymbolRefExpr *TargetSymRef =
+ MCSymbolRefExpr::Create(TargetSymbol, MCSymbolRefExpr::VK_PLT,
+ OutContext);
+ TM.getInstrInfo()->getUnconditionalBranch(JumpToFun, TargetSymRef);
+ OutStreamer.EmitInstruction(JumpToFun, getSubtargetInfo());
+ ++Count;
+ }
+
+ // Emit enough padding instructions to fill up to the next power of two.
+ // This assumes that the trap instruction takes 8 bytes or fewer.
+ uint64_t Remaining = NextPowerOf2(Count) - Count;
+ for (uint64_t C = 0; C < Remaining; ++C) {
+ EmitAlignment(3);
+ OutStreamer.EmitInstruction(TrapInst, getSubtargetInfo());
+ }
+
+ }
+ }
+
// Emit module flags.
SmallVector<Module::ModuleFlagEntry, 8> ModuleFlags;
M.getModuleFlagsMetadata(ModuleFlags);
OutStreamer.Flush();
// Finalize debug and EH information.
- for (unsigned I = 0, E = Handlers.size(); I != E; ++I) {
- const HandlerInfo &OI = Handlers[I];
- NamedRegionTimer T(OI.TimerName, OI.TimerGroupName,
+ for (const HandlerInfo &HI : Handlers) {
+ NamedRegionTimer T(HI.TimerName, HI.TimerGroupName,
TimePassesIsEnabled);
- OI.Handler->endModule();
- delete OI.Handler;
+ HI.Handler->endModule();
+ delete HI.Handler;
}
Handlers.clear();
- DD = 0;
+ DD = nullptr;
// If the target wants to know about weak references, print them all.
if (MAI->getWeakRefDirective()) {
// happen with the MC stuff eventually.
// Print out module-level global variables here.
- for (Module::const_global_iterator I = M.global_begin(), E = M.global_end();
- I != E; ++I) {
- if (!I->hasExternalWeakLinkage()) continue;
- OutStreamer.EmitSymbolAttribute(getSymbol(I), MCSA_WeakReference);
+ for (const auto &G : M.globals()) {
+ if (!G.hasExternalWeakLinkage())
+ continue;
+ OutStreamer.EmitSymbolAttribute(getSymbol(&G), MCSA_WeakReference);
}
- for (Module::const_iterator I = M.begin(), E = M.end(); I != E; ++I) {
- if (!I->hasExternalWeakLinkage()) continue;
- OutStreamer.EmitSymbolAttribute(getSymbol(I), MCSA_WeakReference);
+ for (const auto &F : M) {
+ if (!F.hasExternalWeakLinkage())
+ continue;
+ OutStreamer.EmitSymbolAttribute(getSymbol(&F), MCSA_WeakReference);
}
}
if (MAI->hasSetDirective()) {
OutStreamer.AddBlankLine();
- for (Module::const_alias_iterator I = M.alias_begin(), E = M.alias_end();
- I != E; ++I) {
- MCSymbol *Name = getSymbol(I);
-
- const GlobalValue *GV = I->getAliasedGlobal();
- if (GV->isDeclaration()) {
- report_fatal_error(Name->getName() +
- ": Target doesn't support aliases to declarations");
- }
+ for (const auto &Alias : M.aliases()) {
+ MCSymbol *Name = getSymbol(&Alias);
- MCSymbol *Target = getSymbol(GV);
-
- if (I->hasExternalLinkage() || !MAI->getWeakRefDirective())
+ if (Alias.hasExternalLinkage() || !MAI->getWeakRefDirective())
OutStreamer.EmitSymbolAttribute(Name, MCSA_Global);
- else if (I->hasWeakLinkage() || I->hasLinkOnceLinkage())
+ else if (Alias.hasWeakLinkage() || Alias.hasLinkOnceLinkage())
OutStreamer.EmitSymbolAttribute(Name, MCSA_WeakReference);
else
- assert(I->hasLocalLinkage() && "Invalid alias linkage");
+ assert(Alias.hasLocalLinkage() && "Invalid alias linkage");
- EmitVisibility(Name, I->getVisibility());
+ EmitVisibility(Name, Alias.getVisibility());
// Emit the directives as assignments aka .set:
OutStreamer.EmitAssignment(Name,
- MCSymbolRefExpr::Create(Target, OutContext));
+ lowerConstant(Alias.getAliasee(), *this));
}
}
GCModuleInfo *MI = getAnalysisIfAvailable<GCModuleInfo>();
assert(MI && "AsmPrinter didn't require GCModuleInfo?");
for (GCModuleInfo::iterator I = MI->end(), E = MI->begin(); I != E; )
- if (GCMetadataPrinter *MP = GetOrCreateGCPrinter(*--I))
+ if (GCMetadataPrinter *MP = GetOrCreateGCPrinter(**--I))
MP->finishAssembly(*this);
// Emit llvm.ident metadata in an '.ident' directive.
// after everything else has gone out.
EmitEndOfAsmFile(M);
- delete Mang; Mang = 0;
- MMI = 0;
+ delete Mang; Mang = nullptr;
+ MMI = nullptr;
OutStreamer.Finish();
OutStreamer.reset();
const MachineConstantPoolEntry &CPE = CP[i];
unsigned Align = CPE.getAlignment();
- SectionKind Kind;
- switch (CPE.getRelocationInfo()) {
- default: llvm_unreachable("Unknown section kind");
- case 2: Kind = SectionKind::getReadOnlyWithRel(); break;
- case 1:
- Kind = SectionKind::getReadOnlyWithRelLocal();
- break;
- case 0:
- switch (TM.getDataLayout()->getTypeAllocSize(CPE.getType())) {
- case 4: Kind = SectionKind::getMergeableConst4(); break;
- case 8: Kind = SectionKind::getMergeableConst8(); break;
- case 16: Kind = SectionKind::getMergeableConst16();break;
- default: Kind = SectionKind::getMergeableConst(); break;
- }
- }
+ SectionKind Kind = CPE.getSectionKind(TM.getDataLayout());
+
+ const Constant *C = nullptr;
+ if (!CPE.isMachineConstantPoolEntry())
+ C = CPE.Val.ConstVal;
- const MCSection *S = getObjFileLowering().getSectionForConstant(Kind);
+ const MCSection *S = getObjFileLowering().getSectionForConstant(Kind, C);
// The number of sections are small, just do a linear search from the
// last section to the first.
}
// Now print stuff into the calculated sections.
+ const MCSection *CurSection = nullptr;
+ unsigned Offset = 0;
for (unsigned i = 0, e = CPSections.size(); i != e; ++i) {
- OutStreamer.SwitchSection(CPSections[i].S);
- EmitAlignment(Log2_32(CPSections[i].Alignment));
-
- unsigned Offset = 0;
for (unsigned j = 0, ee = CPSections[i].CPEs.size(); j != ee; ++j) {
unsigned CPI = CPSections[i].CPEs[j];
+ MCSymbol *Sym = GetCPISymbol(CPI);
+ if (!Sym->isUndefined())
+ continue;
+
+ if (CurSection != CPSections[i].S) {
+ OutStreamer.SwitchSection(CPSections[i].S);
+ EmitAlignment(Log2_32(CPSections[i].Alignment));
+ CurSection = CPSections[i].S;
+ Offset = 0;
+ }
+
MachineConstantPoolEntry CPE = CP[CPI];
// Emit inter-object padding for alignment.
Type *Ty = CPE.getType();
Offset = NewOffset + TM.getDataLayout()->getTypeAllocSize(Ty);
- OutStreamer.EmitLabel(GetCPISymbol(CPI));
+ OutStreamer.EmitLabel(Sym);
if (CPE.isMachineConstantPoolEntry())
EmitMachineConstantPoolValue(CPE.Val.MachineCPVal);
else
void AsmPrinter::EmitJumpTableInfo() {
const DataLayout *DL = MF->getTarget().getDataLayout();
const MachineJumpTableInfo *MJTI = MF->getJumpTableInfo();
- if (MJTI == 0) return;
+ if (!MJTI) return;
if (MJTI->getEntryKind() == MachineJumpTableInfo::EK_Inline) return;
const std::vector<MachineJumpTableEntry> &JT = MJTI->getJumpTables();
if (JT.empty()) return;
} else {
// Otherwise, drop it in the readonly section.
const MCSection *ReadOnlySection =
- getObjFileLowering().getSectionForConstant(SectionKind::getReadOnly());
+ getObjFileLowering().getSectionForConstant(SectionKind::getReadOnly(),
+ /*C=*/nullptr);
OutStreamer.SwitchSection(ReadOnlySection);
JTInDiffSection = true;
}
const MachineBasicBlock *MBB,
unsigned UID) const {
assert(MBB && MBB->getNumber() >= 0 && "Invalid basic block");
- const MCExpr *Value = 0;
+ const MCExpr *Value = nullptr;
switch (MJTI->getEntryKind()) {
case MachineJumpTableInfo::EK_Inline:
llvm_unreachable("Cannot emit EK_Inline jump table entry");
}
// Ignore debug and non-emitted data. This handles llvm.compiler.used.
- if (GV->getSection() == "llvm.metadata" ||
+ if (StringRef(GV->getSection()) == "llvm.metadata" ||
GV->hasAvailableExternallyLinkage())
return true;
for (unsigned i = 0, e = InitList->getNumOperands(); i != e; ++i) {
const GlobalValue *GV =
dyn_cast<GlobalValue>(InitList->getOperand(i)->stripPointerCasts());
- if (GV && getObjFileLowering().shouldEmitUsedDirectiveFor(GV, *Mang, TM))
+ if (GV)
OutStreamer.EmitSymbolAttribute(getSymbol(GV), MCSA_NoDeadStrip);
}
}
+namespace {
+struct Structor {
+ Structor() : Priority(0), Func(nullptr), ComdatKey(nullptr) {}
+ int Priority;
+ llvm::Constant *Func;
+ llvm::GlobalValue *ComdatKey;
+};
+} // end namespace
+
/// EmitXXStructorList - Emit the ctor or dtor list taking into account the init
/// priority.
void AsmPrinter::EmitXXStructorList(const Constant *List, bool isCtor) {
const ConstantArray *InitList = dyn_cast<ConstantArray>(List);
if (!InitList) return; // Not an array!
StructType *ETy = dyn_cast<StructType>(InitList->getType()->getElementType());
- if (!ETy || ETy->getNumElements() != 2) return; // Not an array of pairs!
+ // FIXME: Only allow the 3-field form in LLVM 4.0.
+ if (!ETy || ETy->getNumElements() < 2 || ETy->getNumElements() > 3)
+ return; // Not an array of two or three elements!
if (!isa<IntegerType>(ETy->getTypeAtIndex(0U)) ||
!isa<PointerType>(ETy->getTypeAtIndex(1U))) return; // Not (int, ptr).
+ if (ETy->getNumElements() == 3 && !isa<PointerType>(ETy->getTypeAtIndex(2U)))
+ return; // Not (int, ptr, ptr).
// Gather the structors in a form that's convenient for sorting by priority.
- typedef std::pair<unsigned, Constant *> Structor;
SmallVector<Structor, 8> Structors;
- for (unsigned i = 0, e = InitList->getNumOperands(); i != e; ++i) {
- ConstantStruct *CS = dyn_cast<ConstantStruct>(InitList->getOperand(i));
+ for (Value *O : InitList->operands()) {
+ ConstantStruct *CS = dyn_cast<ConstantStruct>(O);
if (!CS) continue; // Malformed.
if (CS->getOperand(1)->isNullValue())
break; // Found a null terminator, skip the rest.
ConstantInt *Priority = dyn_cast<ConstantInt>(CS->getOperand(0));
if (!Priority) continue; // Malformed.
- Structors.push_back(std::make_pair(Priority->getLimitedValue(65535),
- CS->getOperand(1)));
+ Structors.push_back(Structor());
+ Structor &S = Structors.back();
+ S.Priority = Priority->getLimitedValue(65535);
+ S.Func = CS->getOperand(1);
+ if (ETy->getNumElements() == 3 && !CS->getOperand(2)->isNullValue())
+ S.ComdatKey = dyn_cast<GlobalValue>(CS->getOperand(2)->stripPointerCasts());
}
// Emit the function pointers in the target-specific order
const DataLayout *DL = TM.getDataLayout();
unsigned Align = Log2_32(DL->getPointerPrefAlignment());
- std::stable_sort(Structors.begin(), Structors.end(), less_first());
- for (unsigned i = 0, e = Structors.size(); i != e; ++i) {
+ std::stable_sort(Structors.begin(), Structors.end(),
+ [](const Structor &L,
+ const Structor &R) { return L.Priority < R.Priority; });
+ for (Structor &S : Structors) {
+ const TargetLoweringObjectFile &Obj = getObjFileLowering();
+ const MCSymbol *KeySym = nullptr;
+ if (GlobalValue *GV = S.ComdatKey) {
+ if (GV->hasAvailableExternallyLinkage())
+ // If the associated variable is available_externally, some other TU
+ // will provide its dynamic initializer.
+ continue;
+
+ KeySym = getSymbol(GV);
+ }
const MCSection *OutputSection =
- (isCtor ?
- getObjFileLowering().getStaticCtorSection(Structors[i].first) :
- getObjFileLowering().getStaticDtorSection(Structors[i].first));
+ (isCtor ? Obj.getStaticCtorSection(S.Priority, KeySym)
+ : Obj.getStaticDtorSection(S.Priority, KeySym));
OutStreamer.SwitchSection(OutputSection);
if (OutStreamer.getCurrentSection() != OutStreamer.getPreviousSection())
EmitAlignment(Align);
- EmitXXStructor(Structors[i].second);
+ EmitXXStructor(S.Func);
}
}
// an explicit alignment requested, it will override the alignment request
// if required for correctness.
//
-void AsmPrinter::EmitAlignment(unsigned NumBits, const GlobalValue *GV) const {
+void AsmPrinter::EmitAlignment(unsigned NumBits, const GlobalObject *GV) const {
if (GV) NumBits = getGVAlignmentLog2(GV, *TM.getDataLayout(), NumBits);
if (NumBits == 0) return; // 1-byte aligned: no need to emit alignment.
return MCSymbolRefExpr::Create(AP.GetBlockAddressSymbol(BA), Ctx);
const ConstantExpr *CE = dyn_cast<ConstantExpr>(CV);
- if (CE == 0) {
+ if (!CE) {
llvm_unreachable("Unknown constant value to lower!");
}
raw_string_ostream OS(S);
OS << "Unsupported expression in static initializer: ";
CE->printAsOperand(OS, /*PrintType=*/false,
- !AP.MF ? 0 : AP.MF->getFunction()->getParent());
+ !AP.MF ? nullptr : AP.MF->getFunction()->getParent());
report_fatal_error(OS.str());
}
case Instruction::GetElementPtr: {
SmallString<8> StrVal;
CFP->getValueAPF().toString(StrVal);
- CFP->getType()->print(AP.OutStreamer.GetCommentOS());
+ if (CFP->getType())
+ CFP->getType()->print(AP.OutStreamer.GetCommentOS());
+ else
+ AP.OutStreamer.GetCommentOS() << "Printing <null> Type";
AP.OutStreamer.GetCommentOS() << ' ' << StrVal << '\n';
}
// PPC's long double has odd notions of endianness compared to how LLVM
// handles it: p[0] goes first for *big* endian on PPC.
- if (AP.TM.getDataLayout()->isBigEndian() != CFP->getType()->isPPC_FP128Ty()) {
+ if (AP.TM.getDataLayout()->isBigEndian() &&
+ !CFP->getType()->isPPC_FP128Ty()) {
int Chunk = API.getNumWords() - 1;
if (TrailingBytes)
/// GetTempSymbol - Return the MCSymbol corresponding to the assembler
/// temporary label with the specified stem and unique ID.
-MCSymbol *AsmPrinter::GetTempSymbol(StringRef Name, unsigned ID) const {
+MCSymbol *AsmPrinter::GetTempSymbol(Twine Name, unsigned ID) const {
const DataLayout *DL = TM.getDataLayout();
return OutContext.GetOrCreateSymbol(Twine(DL->getPrivateGlobalPrefix()) +
Name + Twine(ID));
/// GetTempSymbol - Return an assembler temporary label with the specified
/// stem.
-MCSymbol *AsmPrinter::GetTempSymbol(StringRef Name) const {
+MCSymbol *AsmPrinter::GetTempSymbol(Twine Name) const {
const DataLayout *DL = TM.getDataLayout();
return OutContext.GetOrCreateSymbol(Twine(DL->getPrivateGlobalPrefix())+
Name);
/// PrintParentLoopComment - Print comments about parent loops of this one.
static void PrintParentLoopComment(raw_ostream &OS, const MachineLoop *Loop,
unsigned FunctionNumber) {
- if (Loop == 0) return;
+ if (!Loop) return;
PrintParentLoopComment(OS, Loop->getParentLoop(), FunctionNumber);
OS.indent(Loop->getLoopDepth()*2)
<< "Parent Loop BB" << FunctionNumber << "_"
static void PrintChildLoopComment(raw_ostream &OS, const MachineLoop *Loop,
unsigned FunctionNumber) {
// Add child loop information
- for (MachineLoop::iterator CL = Loop->begin(), E = Loop->end();CL != E; ++CL){
- OS.indent((*CL)->getLoopDepth()*2)
+ for (const MachineLoop *CL : *Loop) {
+ OS.indent(CL->getLoopDepth()*2)
<< "Child Loop BB" << FunctionNumber << "_"
- << (*CL)->getHeader()->getNumber() << " Depth " << (*CL)->getLoopDepth()
+ << CL->getHeader()->getNumber() << " Depth " << CL->getLoopDepth()
<< '\n';
- PrintChildLoopComment(OS, *CL, FunctionNumber);
+ PrintChildLoopComment(OS, CL, FunctionNumber);
}
}
const AsmPrinter &AP) {
// Add loop depth information
const MachineLoop *Loop = LI->getLoopFor(&MBB);
- if (Loop == 0) return;
+ if (!Loop) return;
MachineBasicBlock *Header = Loop->getHeader();
assert(Header && "No header for loop");
/// EmitBasicBlockStart - This method prints the label for the specified
/// MachineBasicBlock, an alignment (if present) and a comment describing
/// it if appropriate.
-void AsmPrinter::EmitBasicBlockStart(const MachineBasicBlock *MBB) const {
+void AsmPrinter::EmitBasicBlockStart(const MachineBasicBlock &MBB) const {
// Emit an alignment directive for this block, if needed.
- if (unsigned Align = MBB->getAlignment())
+ if (unsigned Align = MBB.getAlignment())
EmitAlignment(Align);
// If the block has its address taken, emit any labels that were used to
// reference the block. It is possible that there is more than one label
// here, because multiple LLVM BB's may have been RAUW'd to this block after
// the references were generated.
- if (MBB->hasAddressTaken()) {
- const BasicBlock *BB = MBB->getBasicBlock();
+ if (MBB.hasAddressTaken()) {
+ const BasicBlock *BB = MBB.getBasicBlock();
if (isVerbose())
OutStreamer.AddComment("Block address taken");
- std::vector<MCSymbol*> Syms = MMI->getAddrLabelSymbolToEmit(BB);
-
- for (unsigned i = 0, e = Syms.size(); i != e; ++i)
- OutStreamer.EmitLabel(Syms[i]);
+ std::vector<MCSymbol*> Symbols = MMI->getAddrLabelSymbolToEmit(BB);
+ for (auto *Sym : Symbols)
+ OutStreamer.EmitLabel(Sym);
}
// Print some verbose block comments.
if (isVerbose()) {
- if (const BasicBlock *BB = MBB->getBasicBlock())
+ if (const BasicBlock *BB = MBB.getBasicBlock())
if (BB->hasName())
OutStreamer.AddComment("%" + BB->getName());
- emitBasicBlockLoopComments(*MBB, LI, *this);
+ emitBasicBlockLoopComments(MBB, LI, *this);
}
// Print the main label for the block.
- if (MBB->pred_empty() || isBlockOnlyReachableByFallthrough(MBB)) {
+ if (MBB.pred_empty() || isBlockOnlyReachableByFallthrough(&MBB)) {
if (isVerbose()) {
// NOTE: Want this comment at start of line, don't emit with AddComment.
- OutStreamer.emitRawComment(" BB#" + Twine(MBB->getNumber()) + ":", false);
+ OutStreamer.emitRawComment(" BB#" + Twine(MBB.getNumber()) + ":", false);
}
} else {
- OutStreamer.EmitLabel(MBB->getSymbol());
+ OutStreamer.EmitLabel(MBB.getSymbol());
}
}
return false;
// If there isn't exactly one predecessor, it can't be a fall through.
- MachineBasicBlock::const_pred_iterator PI = MBB->pred_begin(), PI2 = PI;
- ++PI2;
- if (PI2 != MBB->pred_end())
+ if (MBB->pred_size() > 1)
return false;
// The predecessor has to be immediately before this block.
- MachineBasicBlock *Pred = *PI;
-
+ MachineBasicBlock *Pred = *MBB->pred_begin();
if (!Pred->isLayoutSuccessor(MBB))
return false;
return true;
// Check the terminators in the previous blocks
- for (MachineBasicBlock::iterator II = Pred->getFirstTerminator(),
- IE = Pred->end(); II != IE; ++II) {
- MachineInstr &MI = *II;
-
+ for (const auto &MI : Pred->terminators()) {
// If it is not a simple branch, we are in a table somewhere.
if (!MI.isBranch() || MI.isIndirectBranch())
return false;
-GCMetadataPrinter *AsmPrinter::GetOrCreateGCPrinter(GCStrategy *S) {
- if (!S->usesMetadata())
- return 0;
+GCMetadataPrinter *AsmPrinter::GetOrCreateGCPrinter(GCStrategy &S) {
+ if (!S.usesMetadata())
+ return nullptr;
gcp_map_type &GCMap = getGCMap(GCMetadataPrinters);
- gcp_map_type::iterator GCPI = GCMap.find(S);
+ gcp_map_type::iterator GCPI = GCMap.find(&S);
if (GCPI != GCMap.end())
- return GCPI->second;
+ return GCPI->second.get();
- const char *Name = S->getName().c_str();
+ const char *Name = S.getName().c_str();
for (GCMetadataPrinterRegistry::iterator
I = GCMetadataPrinterRegistry::begin(),
E = GCMetadataPrinterRegistry::end(); I != E; ++I)
if (strcmp(Name, I->getName()) == 0) {
- GCMetadataPrinter *GMP = I->instantiate();
- GMP->S = S;
- GCMap.insert(std::make_pair(S, GMP));
- return GMP;
+ std::unique_ptr<GCMetadataPrinter> GMP = I->instantiate();
+ GMP->S = &S;
+ auto IterBool = GCMap.insert(std::make_pair(&S, std::move(GMP)));
+ return IterBool.first->second.get();
}
report_fatal_error("no GCMetadataPrinter registered for GC: " + Twine(Name));
projects / oota-llvm.git / blobdiff