#include "llvm/CodeGen/MachineModuleInfo.h"
#include "llvm/Analysis/DebugInfo.h"
#include "llvm/MC/MCContext.h"
+#include "llvm/MC/MCExpr.h"
#include "llvm/MC/MCInst.h"
#include "llvm/MC/MCSection.h"
#include "llvm/MC/MCStreamer.h"
// Allow the target to emit any magic that it wants at the start of the file.
EmitStartOfAsmFile(M);
+ // Very minimal debug info. It is ignored if we emit actual debug info. If we
+ // don't, this at least helps the user find where a global came from.
if (MAI->hasSingleParameterDotFile()) {
- /* Very minimal debug info. It is ignored if we emit actual
- debug info. If we don't, this at least helps the user find where
- a function came from. */
- O << "\t.file\t\"" << M.getModuleIdentifier() << "\"\n";
+ // .file "foo.c"
+ OutStreamer.EmitFileDirective(M.getModuleIdentifier());
}
GCModuleInfo *MI = getAnalysisIfAvailable<GCModuleInfo>();
MCSymbol *GVSym = GetGlobalValueSymbol(GV);
printVisibility(GVSym, GV->getVisibility());
- if (MAI->hasDotTypeDotSizeDirective()) {
- O << "\t.type\t" << *GVSym;
- if (MAI->getCommentString()[0] != '@')
- O << ",@object\n";
- else
- O << ",%object\n";
- }
+ if (MAI->hasDotTypeDotSizeDirective())
+ OutStreamer.EmitSymbolAttribute(GVSym, MCSA_ELF_TypeObject);
SectionKind GVKind = TargetLoweringObjectFile::getKindForGlobal(GV, TM);
return;
}
- if (const char *LComm = MAI->getLCOMMDirective()) {
+ if (MAI->hasLCOMMDirective()) {
// .lcomm _foo, 42
- O << LComm << *GVSym << ',' << Size;
- O << '\n';
+ OutStreamer.EmitLocalCommonSymbol(GVSym, Size);
return;
}
// .local _foo
- O << "\t.local\t" << *GVSym << '\n';
+ OutStreamer.EmitSymbolAttribute(GVSym, MCSA_Local);
// .comm _foo, 42, 4
OutStreamer.EmitCommonSymbol(GVSym, Size, 1 << AlignLog);
return;
// emission.
if (GVKind.isBSSExtern() && MAI->hasMachoZeroFillDirective()) {
// .globl _foo
- OutStreamer.EmitSymbolAttribute(GVSym, MCStreamer::Global);
+ OutStreamer.EmitSymbolAttribute(GVSym, MCSA_Global);
// .zerofill __DATA, __common, _foo, 400, 5
OutStreamer.EmitZerofill(TheSection, GVSym, Size, 1 << AlignLog);
return;
case GlobalValue::LinkerPrivateLinkage:
if (MAI->getWeakDefDirective() != 0) {
// .globl _foo
- OutStreamer.EmitSymbolAttribute(GVSym, MCStreamer::Global);
+ OutStreamer.EmitSymbolAttribute(GVSym, MCSA_Global);
// .weak_definition _foo
- OutStreamer.EmitSymbolAttribute(GVSym, MCStreamer::WeakDefinition);
+ OutStreamer.EmitSymbolAttribute(GVSym, MCSA_WeakDefinition);
} else if (const char *LinkOnce = MAI->getLinkOnceDirective()) {
// .globl _foo
- OutStreamer.EmitSymbolAttribute(GVSym, MCStreamer::Global);
+ OutStreamer.EmitSymbolAttribute(GVSym, MCSA_Global);
+ // FIXME: linkonce should be a section attribute, handled by COFF Section
+ // assignment.
+ // http://sourceware.org/binutils/docs-2.20/as/Linkonce.html#Linkonce
// .linkonce same_size
O << LinkOnce;
} else {
// .weak _foo
- OutStreamer.EmitSymbolAttribute(GVSym, MCStreamer::Weak);
+ OutStreamer.EmitSymbolAttribute(GVSym, MCSA_Weak);
}
break;
case GlobalValue::DLLExportLinkage:
case GlobalValue::ExternalLinkage:
// If external or appending, declare as a global symbol.
// .globl _foo
- OutStreamer.EmitSymbolAttribute(GVSym, MCStreamer::Global);
+ OutStreamer.EmitSymbolAttribute(GVSym, MCSA_Global);
break;
case GlobalValue::PrivateLinkage:
case GlobalValue::InternalLinkage:
EmitGlobalConstant(GV->getInitializer());
if (MAI->hasDotTypeDotSizeDirective())
- O << "\t.size\t" << *GVSym << ", " << Size << '\n';
+ // .size foo, 42
+ OutStreamer.EmitELFSize(GVSym, MCConstantExpr::Create(Size, OutContext));
OutStreamer.AddBlankLine();
}
for (Module::const_global_iterator I = M.global_begin(), E = M.global_end();
I != E; ++I) {
if (!I->hasExternalWeakLinkage()) continue;
- O << MAI->getWeakRefDirective() << *GetGlobalValueSymbol(I) << '\n';
+ OutStreamer.EmitSymbolAttribute(GetGlobalValueSymbol(I),
+ MCSA_WeakReference);
}
for (Module::const_iterator I = M.begin(), E = M.end(); I != E; ++I) {
if (!I->hasExternalWeakLinkage()) continue;
- O << MAI->getWeakRefDirective() << *GetGlobalValueSymbol(I) << '\n';
+ OutStreamer.EmitSymbolAttribute(GetGlobalValueSymbol(I),
+ MCSA_WeakReference);
}
}
if (MAI->getSetDirective()) {
- O << '\n';
+ OutStreamer.AddBlankLine();
for (Module::const_alias_iterator I = M.alias_begin(), E = M.alias_end();
I != E; ++I) {
MCSymbol *Name = GetGlobalValueSymbol(I);
MCSymbol *Target = GetGlobalValueSymbol(GV);
if (I->hasExternalLinkage() || !MAI->getWeakRefDirective())
- O << "\t.globl\t" << *Name << '\n';
+ OutStreamer.EmitSymbolAttribute(Name, MCSA_Global);
else if (I->hasWeakLinkage())
- O << MAI->getWeakRefDirective() << *Name << '\n';
+ OutStreamer.EmitSymbolAttribute(Name, MCSA_WeakReference);
else
assert(I->hasLocalLinkage() && "Invalid alias linkage");
// to be executable. Some targets have a directive to declare this.
Function *InitTrampolineIntrinsic = M.getFunction("llvm.init.trampoline");
if (!InitTrampolineIntrinsic || InitTrampolineIntrinsic->use_empty())
- if (MAI->getNonexecutableStackDirective())
- O << MAI->getNonexecutableStackDirective() << '\n';
-
+ if (MCSection *S = MAI->getNonexecutableStackSection(OutContext))
+ OutStreamer.SwitchSection(S);
// Allow the target to emit any magic that it wants at the end of the file,
// after everything else has gone out.
const Type *Ty = CPE.getType();
Offset = NewOffset + TM.getTargetData()->getTypeAllocSize(Ty);
- O << MAI->getPrivateGlobalPrefix() << "CPI" << getFunctionNumber() << '_'
- << CPI << ':';
+ // Emit the label with a comment on it.
if (VerboseAsm) {
- O.PadToColumn(MAI->getCommentColumn());
- O << MAI->getCommentString() << " constant ";
- WriteTypeSymbolic(O, CPE.getType(), MF->getFunction()->getParent());
+ OutStreamer.GetCommentOS() << "constant pool ";
+ WriteTypeSymbolic(OutStreamer.GetCommentOS(), CPE.getType(),
+ MF->getFunction()->getParent());
+ OutStreamer.GetCommentOS() << '\n';
}
- O << '\n';
+ OutStreamer.EmitLabel(GetCPISymbol(CPI));
+
if (CPE.isMachineConstantPoolEntry())
EmitMachineConstantPoolValue(CPE.Val.MachineCPVal);
else
// before each jump table. The first label is never referenced, but tells
// the assembler and linker the extents of the jump table object. The
// second label is actually referenced by the code.
- if (JTInDiffSection && MAI->getLinkerPrivateGlobalPrefix()[0]) {
- O << MAI->getLinkerPrivateGlobalPrefix()
- << "JTI" << getFunctionNumber() << '_' << i << ":\n";
- }
-
- O << MAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber()
- << '_' << i << ":\n";
-
- for (unsigned ii = 0, ee = JTBBs.size(); ii != ee; ++ii) {
- printPICJumpTableEntry(MJTI, JTBBs[ii], i);
- O << '\n';
+ if (JTInDiffSection && MAI->getLinkerPrivateGlobalPrefix()[0])
+ OutStreamer.EmitLabel(GetJTISymbol(i, true));
+
+ OutStreamer.EmitLabel(GetJTISymbol(i));
+
+ if (!IsPic) {
+ // In non-pic mode, the entries in the jump table are direct references
+ // to the basic blocks.
+ unsigned EntrySize = MJTI->getEntrySize();
+ for (unsigned ii = 0, ee = JTBBs.size(); ii != ee; ++ii) {
+ MCSymbol *MBBSym = GetMBBSymbol(JTBBs[ii]->getNumber());
+ OutStreamer.EmitValue(MCSymbolRefExpr::Create(MBBSym, OutContext),
+ EntrySize, /*addrspace*/0);
+ }
+ } else {
+ for (unsigned ii = 0, ee = JTBBs.size(); ii != ee; ++ii)
+ printPICJumpTableEntry(MJTI, JTBBs[ii], i);
}
}
}
void AsmPrinter::printPICJumpTableEntry(const MachineJumpTableInfo *MJTI,
const MachineBasicBlock *MBB,
unsigned uid) const {
- bool isPIC = TM.getRelocationModel() == Reloc::PIC_;
-
- // Use JumpTableDirective otherwise honor the entry size from the jump table
- // info.
- const char *JTEntryDirective = MAI->getJumpTableDirective(isPIC);
- bool HadJTEntryDirective = JTEntryDirective != NULL;
- if (!HadJTEntryDirective) {
- JTEntryDirective = MJTI->getEntrySize() == 4 ?
- MAI->getData32bitsDirective() : MAI->getData64bitsDirective();
+ // If the target supports GPRel, use it.
+ if (const char *GPRel32Dir = MAI->getGPRel32Directive()) {
+ O << GPRel32Dir << *GetMBBSymbol(MBB->getNumber()) << '\n';
+ return;
}
-
- O << JTEntryDirective << ' ';
-
+
// If we have emitted set directives for the jump table entries, print
// them rather than the entries themselves. If we're emitting PIC, then
// emit the table entries as differences between two text section labels.
- // If we're emitting non-PIC code, then emit the entries as direct
- // references to the target basic blocks.
- if (!isPIC) {
- O << *GetMBBSymbol(MBB->getNumber());
- } else if (MAI->getSetDirective()) {
- O << MAI->getPrivateGlobalPrefix() << getFunctionNumber()
- << '_' << uid << "_set_" << MBB->getNumber();
+ const MCExpr *Val;
+ if (MAI->getSetDirective()) {
+ // If we used .set, reference the .set's symbol.
+ Val = MCSymbolRefExpr::Create(GetJTSetSymbol(uid, MBB->getNumber()),
+ OutContext);
} else {
- O << *GetMBBSymbol(MBB->getNumber());
- // If the arch uses custom Jump Table directives, don't calc relative to
- // JT
- if (!HadJTEntryDirective)
- O << '-' << MAI->getPrivateGlobalPrefix() << "JTI"
- << getFunctionNumber() << '_' << uid;
+ // Otherwise, use the difference as the jump table entry.
+ Val = MCSymbolRefExpr::Create(GetMBBSymbol(MBB->getNumber()), OutContext);
+ const MCExpr *JTI = MCSymbolRefExpr::Create(GetJTISymbol(uid), OutContext);
+ Val = MCBinaryExpr::CreateSub(Val, JTI, OutContext);
}
+
+ OutStreamer.EmitValue(Val, MJTI->getEntrySize(), /*addrspace*/0);
}
/// do nothing and return false.
bool AsmPrinter::EmitSpecialLLVMGlobal(const GlobalVariable *GV) {
if (GV->getName() == "llvm.used") {
- if (MAI->getUsedDirective() != 0) // No need to emit this at all.
+ if (MAI->hasNoDeadStrip()) // No need to emit this at all.
EmitLLVMUsedList(GV->getInitializer());
return true;
}
EmitXXStructorList(GV->getInitializer());
if (TM.getRelocationModel() == Reloc::Static &&
- MAI->hasStaticCtorDtorReferenceInStaticMode())
- O << ".reference .constructors_used\n";
+ MAI->hasStaticCtorDtorReferenceInStaticMode()) {
+ StringRef Sym(".constructors_used");
+ OutStreamer.EmitSymbolAttribute(OutContext.GetOrCreateSymbol(Sym),
+ MCSA_Reference);
+ }
return true;
}
EmitXXStructorList(GV->getInitializer());
if (TM.getRelocationModel() == Reloc::Static &&
- MAI->hasStaticCtorDtorReferenceInStaticMode())
- O << ".reference .destructors_used\n";
+ MAI->hasStaticCtorDtorReferenceInStaticMode()) {
+ StringRef Sym(".destructors_used");
+ OutStreamer.EmitSymbolAttribute(OutContext.GetOrCreateSymbol(Sym),
+ MCSA_Reference);
+ }
return true;
}
/// global in the specified llvm.used list for which emitUsedDirectiveFor
/// is true, as being used with this directive.
void AsmPrinter::EmitLLVMUsedList(Constant *List) {
- const char *Directive = MAI->getUsedDirective();
-
// Should be an array of 'i8*'.
ConstantArray *InitList = dyn_cast<ConstantArray>(List);
if (InitList == 0) return;
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)) {
- O << Directive;
- EmitConstantValueOnly(InitList->getOperand(i));
- O << '\n';
- }
+ if (GV && getObjFileLowering().shouldEmitUsedDirectiveFor(GV, Mang))
+ OutStreamer.EmitSymbolAttribute(GetGlobalValueSymbol(GV),
+ MCSA_NoDeadStrip);
}
}
}
}
-
-//===----------------------------------------------------------------------===//
-/// LEB 128 number encoding.
-
-/// PrintULEB128 - Print a series of hexadecimal values (separated by commas)
-/// representing an unsigned leb128 value.
-void AsmPrinter::PrintULEB128(unsigned Value) const {
- do {
- unsigned char Byte = static_cast<unsigned char>(Value & 0x7f);
- Value >>= 7;
- if (Value) Byte |= 0x80;
- PrintHex(Byte);
- if (Value) O << ", ";
- } while (Value);
-}
-
-/// PrintSLEB128 - Print a series of hexadecimal values (separated by commas)
-/// representing a signed leb128 value.
-void AsmPrinter::PrintSLEB128(int Value) const {
- int Sign = Value >> (8 * sizeof(Value) - 1);
- bool IsMore;
-
- do {
- unsigned char Byte = static_cast<unsigned char>(Value & 0x7f);
- Value >>= 7;
- IsMore = Value != Sign || ((Byte ^ Sign) & 0x40) != 0;
- if (IsMore) Byte |= 0x80;
- PrintHex(Byte);
- if (IsMore) O << ", ";
- } while (IsMore);
-}
-
//===--------------------------------------------------------------------===//
// Emission and print routines
//
-/// PrintHex - Print a value as a hexadecimal value.
-///
-void AsmPrinter::PrintHex(uint64_t Value) const {
- O << "0x";
- O.write_hex(Value);
-}
-
-/// EOL - Print a newline character to asm stream. If a comment is present
-/// then it will be printed first. Comments should not contain '\n'.
-void AsmPrinter::EOL() const {
- O << '\n';
-}
-
-void AsmPrinter::EOL(const Twine &Comment) const {
- if (VerboseAsm && !Comment.isTriviallyEmpty()) {
- O.PadToColumn(MAI->getCommentColumn());
- O << MAI->getCommentString() << ' ' << Comment;
- }
- O << '\n';
-}
-
-static const char *DecodeDWARFEncoding(unsigned Encoding) {
- switch (Encoding) {
- case dwarf::DW_EH_PE_absptr:
- return "absptr";
- case dwarf::DW_EH_PE_omit:
- return "omit";
- case dwarf::DW_EH_PE_pcrel:
- return "pcrel";
- case dwarf::DW_EH_PE_udata4:
- return "udata4";
- case dwarf::DW_EH_PE_udata8:
- return "udata8";
- case dwarf::DW_EH_PE_sdata4:
- return "sdata4";
- case dwarf::DW_EH_PE_sdata8:
- return "sdata8";
- case dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_udata4:
- return "pcrel udata4";
- case dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4:
- return "pcrel sdata4";
- case dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_udata8:
- return "pcrel udata8";
- case dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata8:
- return "pcrel sdata8";
- case dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |dwarf::DW_EH_PE_udata4:
- return "indirect pcrel udata4";
- case dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |dwarf::DW_EH_PE_sdata4:
- return "indirect pcrel sdata4";
- case dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |dwarf::DW_EH_PE_udata8:
- return "indirect pcrel udata8";
- case dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |dwarf::DW_EH_PE_sdata8:
- return "indirect pcrel sdata8";
- }
-
- return 0;
-}
-
-void AsmPrinter::EOL(const Twine &Comment, unsigned Encoding) const {
- if (VerboseAsm && !Comment.isTriviallyEmpty()) {
- O.PadToColumn(MAI->getCommentColumn());
- O << MAI->getCommentString()
- << ' '
- << Comment;
-
- if (const char *EncStr = DecodeDWARFEncoding(Encoding))
- O << " (" << EncStr << ')';
- }
- O << '\n';
-}
-
-/// EmitULEB128Bytes - Emit an assembler byte data directive to compose an
-/// unsigned leb128 value.
-void AsmPrinter::EmitULEB128Bytes(unsigned Value) const {
- if (MAI->hasLEB128()) {
- O << "\t.uleb128\t"
- << Value;
- } else {
- O << MAI->getData8bitsDirective();
- PrintULEB128(Value);
- }
-}
-
-/// EmitSLEB128Bytes - print an assembler byte data directive to compose a
-/// signed leb128 value.
-void AsmPrinter::EmitSLEB128Bytes(int Value) const {
- if (MAI->hasLEB128()) {
- O << "\t.sleb128\t"
- << Value;
- } else {
- O << MAI->getData8bitsDirective();
- PrintSLEB128(Value);
- }
-}
-
/// EmitInt8 - Emit a byte directive and value.
///
void AsmPrinter::EmitInt8(int Value) const {
OutStreamer.EmitIntValue(Value, 8, 0/*addrspace*/);
}
-/// toOctal - Convert the low order bits of X into an octal digit.
-///
-static inline char toOctal(int X) {
- return (X&7)+'0';
-}
-
-/// printStringChar - Print a char, escaped if necessary.
-///
-static void printStringChar(formatted_raw_ostream &O, unsigned char C) {
- if (C == '"') {
- O << "\\\"";
- } else if (C == '\\') {
- O << "\\\\";
- } else if (isprint((unsigned char)C)) {
- O << C;
- } else {
- switch(C) {
- case '\b': O << "\\b"; break;
- case '\f': O << "\\f"; break;
- case '\n': O << "\\n"; break;
- case '\r': O << "\\r"; break;
- case '\t': O << "\\t"; break;
- default:
- O << '\\';
- O << toOctal(C >> 6);
- O << toOctal(C >> 3);
- O << toOctal(C >> 0);
- break;
- }
- }
-}
-
-/// EmitString - Emit a string with quotes and a null terminator.
-/// Special characters are emitted properly.
-/// \literal (Eg. '\t') \endliteral
-void AsmPrinter::EmitString(const StringRef String) const {
- EmitString(String.data(), String.size());
-}
-
-void AsmPrinter::EmitString(const char *String, unsigned Size) const {
- const char* AscizDirective = MAI->getAscizDirective();
- if (AscizDirective)
- O << AscizDirective;
- else
- O << MAI->getAsciiDirective();
- O << '\"';
- for (unsigned i = 0; i < Size; ++i)
- printStringChar(O, String[i]);
- if (AscizDirective)
- O << '\"';
- else
- O << "\\0\"";
-}
-
-
-/// EmitFile - Emit a .file directive.
-void AsmPrinter::EmitFile(unsigned Number, StringRef Name) const {
- O << "\t.file\t" << Number << " \"";
- for (unsigned i = 0, N = Name.size(); i < N; ++i)
- printStringChar(O, Name[i]);
- O << '\"';
-}
-
-
//===----------------------------------------------------------------------===//
// EmitAlignment - Emit an alignment directive to the specified power of
OutStreamer.EmitValueToAlignment(1 << NumBits, FillValue, 1, 0);
}
-// Print out the specified constant, without a storage class. Only the
-// constants valid in constant expressions can occur here.
-void AsmPrinter::EmitConstantValueOnly(const Constant *CV) {
- if (CV->isNullValue() || isa<UndefValue>(CV)) {
- O << '0';
- return;
- }
-
- if (const ConstantInt *CI = dyn_cast<ConstantInt>(CV)) {
- O << CI->getZExtValue();
- return;
- }
+/// LowerConstant - Lower the specified LLVM Constant to an MCExpr.
+///
+static const MCExpr *LowerConstant(const Constant *CV, AsmPrinter &AP) {
+ MCContext &Ctx = AP.OutContext;
- if (const GlobalValue *GV = dyn_cast<GlobalValue>(CV)) {
- // This is a constant address for a global variable or function. Use the
- // name of the variable or function as the address value.
- O << *GetGlobalValueSymbol(GV);
- return;
- }
+ if (CV->isNullValue() || isa<UndefValue>(CV))
+ return MCConstantExpr::Create(0, Ctx);
+
+ if (const ConstantInt *CI = dyn_cast<ConstantInt>(CV))
+ return MCConstantExpr::Create(CI->getZExtValue(), Ctx);
- if (const BlockAddress *BA = dyn_cast<BlockAddress>(CV)) {
- O << *GetBlockAddressSymbol(BA);
- return;
- }
+ if (const GlobalValue *GV = dyn_cast<GlobalValue>(CV))
+ return MCSymbolRefExpr::Create(AP.GetGlobalValueSymbol(GV), Ctx);
+ if (const BlockAddress *BA = dyn_cast<BlockAddress>(CV))
+ return MCSymbolRefExpr::Create(AP.GetBlockAddressSymbol(BA), Ctx);
const ConstantExpr *CE = dyn_cast<ConstantExpr>(CV);
if (CE == 0) {
- llvm_unreachable("Unknown constant value!");
- O << '0';
- return;
+ llvm_unreachable("Unknown constant value to lower!");
+ return MCConstantExpr::Create(0, Ctx);
}
switch (CE->getOpcode()) {
case Instruction::SIToFP:
case Instruction::FPToUI:
case Instruction::FPToSI:
- default:
- llvm_unreachable("FIXME: Don't support this constant cast expr");
+ default: llvm_unreachable("FIXME: Don't support this constant cast expr");
case Instruction::GetElementPtr: {
- // generate a symbolic expression for the byte address
- const TargetData *TD = TM.getTargetData();
- const Constant *ptrVal = CE->getOperand(0);
- SmallVector<Value*, 8> idxVec(CE->op_begin()+1, CE->op_end());
- int64_t Offset = TD->getIndexedOffset(ptrVal->getType(), &idxVec[0],
- idxVec.size());
+ const TargetData &TD = *AP.TM.getTargetData();
+ // Generate a symbolic expression for the byte address
+ const Constant *PtrVal = CE->getOperand(0);
+ SmallVector<Value*, 8> IdxVec(CE->op_begin()+1, CE->op_end());
+ int64_t Offset = TD.getIndexedOffset(PtrVal->getType(), &IdxVec[0],
+ IdxVec.size());
+
+ const MCExpr *Base = LowerConstant(CE->getOperand(0), AP);
if (Offset == 0)
- return EmitConstantValueOnly(ptrVal);
+ return Base;
// Truncate/sext the offset to the pointer size.
- if (TD->getPointerSizeInBits() != 64) {
- int SExtAmount = 64-TD->getPointerSizeInBits();
+ if (TD.getPointerSizeInBits() != 64) {
+ int SExtAmount = 64-TD.getPointerSizeInBits();
Offset = (Offset << SExtAmount) >> SExtAmount;
}
- if (Offset)
- O << '(';
- EmitConstantValueOnly(ptrVal);
- if (Offset > 0)
- O << ") + " << Offset;
- else
- O << ") - " << -Offset;
- return;
+ return MCBinaryExpr::CreateAdd(Base, MCConstantExpr::Create(Offset, Ctx),
+ Ctx);
}
+
+ case Instruction::Trunc:
+ // We emit the value and depend on the assembler to truncate the generated
+ // expression properly. This is important for differences between
+ // blockaddress labels. Since the two labels are in the same function, it
+ // is reasonable to treat their delta as a 32-bit value.
+ // FALL THROUGH.
case Instruction::BitCast:
- return EmitConstantValueOnly(CE->getOperand(0));
+ return LowerConstant(CE->getOperand(0), AP);
case Instruction::IntToPtr: {
+ const TargetData &TD = *AP.TM.getTargetData();
// Handle casts to pointers by changing them into casts to the appropriate
// integer type. This promotes constant folding and simplifies this code.
- const TargetData *TD = TM.getTargetData();
Constant *Op = CE->getOperand(0);
- Op = ConstantExpr::getIntegerCast(Op, TD->getIntPtrType(CV->getContext()),
+ Op = ConstantExpr::getIntegerCast(Op, TD.getIntPtrType(CV->getContext()),
false/*ZExt*/);
- return EmitConstantValueOnly(Op);
+ return LowerConstant(Op, AP);
}
case Instruction::PtrToInt: {
+ const TargetData &TD = *AP.TM.getTargetData();
// Support only foldable casts to/from pointers that can be eliminated by
// changing the pointer to the appropriately sized integer type.
Constant *Op = CE->getOperand(0);
const Type *Ty = CE->getType();
- const TargetData *TD = TM.getTargetData();
+
+ const MCExpr *OpExpr = LowerConstant(Op, AP);
// We can emit the pointer value into this slot if the slot is an
- // integer slot greater or equal to the size of the pointer.
- if (TD->getTypeAllocSize(Ty) == TD->getTypeAllocSize(Op->getType()))
- return EmitConstantValueOnly(Op);
-
- O << "((";
- EmitConstantValueOnly(Op);
- APInt ptrMask =
- APInt::getAllOnesValue(TD->getTypeAllocSizeInBits(Op->getType()));
-
- SmallString<40> S;
- ptrMask.toStringUnsigned(S);
- O << ") & " << S.str() << ')';
- return;
+ // integer slot equal to the size of the pointer.
+ if (TD.getTypeAllocSize(Ty) == TD.getTypeAllocSize(Op->getType()))
+ return OpExpr;
+
+ // Otherwise the pointer is smaller than the resultant integer, mask off
+ // the high bits so we are sure to get a proper truncation if the input is
+ // a constant expr.
+ unsigned InBits = TD.getTypeAllocSizeInBits(Op->getType());
+ const MCExpr *MaskExpr = MCConstantExpr::Create(~0ULL >> (64-InBits), Ctx);
+ return MCBinaryExpr::CreateAnd(OpExpr, MaskExpr, Ctx);
}
- case Instruction::Trunc:
- // We emit the value and depend on the assembler to truncate the generated
- // expression properly. This is important for differences between
- // blockaddress labels. Since the two labels are in the same function, it
- // is reasonable to treat their delta as a 32-bit value.
- return EmitConstantValueOnly(CE->getOperand(0));
-
case Instruction::Add:
case Instruction::Sub:
case Instruction::And:
case Instruction::Or:
- case Instruction::Xor:
- O << '(';
- EmitConstantValueOnly(CE->getOperand(0));
- O << ')';
+ case Instruction::Xor: {
+ const MCExpr *LHS = LowerConstant(CE->getOperand(0), AP);
+ const MCExpr *RHS = LowerConstant(CE->getOperand(1), AP);
switch (CE->getOpcode()) {
- case Instruction::Add:
- O << " + ";
- break;
- case Instruction::Sub:
- O << " - ";
- break;
- case Instruction::And:
- O << " & ";
- break;
- case Instruction::Or:
- O << " | ";
- break;
- case Instruction::Xor:
- O << " ^ ";
- break;
- default:
- break;
+ default: llvm_unreachable("Unknown binary operator constant cast expr");
+ case Instruction::Add: return MCBinaryExpr::CreateAdd(LHS, RHS, Ctx);
+ case Instruction::Sub: return MCBinaryExpr::CreateSub(LHS, RHS, Ctx);
+ case Instruction::And: return MCBinaryExpr::CreateAnd(LHS, RHS, Ctx);
+ case Instruction::Or: return MCBinaryExpr::CreateOr (LHS, RHS, Ctx);
+ case Instruction::Xor: return MCBinaryExpr::CreateXor(LHS, RHS, Ctx);
}
- O << '(';
- EmitConstantValueOnly(CE->getOperand(1));
- O << ')';
- break;
}
-}
-
-/// printAsCString - Print the specified array as a C compatible string, only if
-/// the predicate isString is true.
-///
-static void printAsCString(formatted_raw_ostream &O, const ConstantArray *CVA,
- unsigned LastElt) {
- assert(CVA->isString() && "Array is not string compatible!");
-
- O << '\"';
- for (unsigned i = 0; i != LastElt; ++i) {
- unsigned char C =
- (unsigned char)cast<ConstantInt>(CVA->getOperand(i))->getZExtValue();
- printStringChar(O, C);
}
- O << '\"';
-}
-
-/// EmitString - Emit a zero-byte-terminated string constant.
-///
-void AsmPrinter::EmitString(const ConstantArray *CVA) const {
- unsigned NumElts = CVA->getNumOperands();
- if (MAI->getAscizDirective() && NumElts &&
- cast<ConstantInt>(CVA->getOperand(NumElts-1))->getZExtValue() == 0) {
- O << MAI->getAscizDirective();
- printAsCString(O, CVA, NumElts-1);
- } else {
- O << MAI->getAsciiDirective();
- printAsCString(O, CVA, NumElts);
- }
- O << '\n';
}
static void EmitGlobalConstantArray(const ConstantArray *CA, unsigned AddrSpace,
AsmPrinter &AP) {
- if (AddrSpace == 0 && CA->isString()) {
- AP.EmitString(CA);
- } else { // Not a string. Print the values in successive locations
+ if (AddrSpace != 0 || !CA->isString()) {
+ // Not a string. Print the values in successive locations
for (unsigned i = 0, e = CA->getNumOperands(); i != e; ++i)
AP.EmitGlobalConstant(CA->getOperand(i), AddrSpace);
+ return;
}
+
+ // Otherwise, it can be emitted as .ascii.
+ SmallVector<char, 128> TmpVec;
+ TmpVec.reserve(CA->getNumOperands());
+ for (unsigned i = 0, e = CA->getNumOperands(); i != e; ++i)
+ TmpVec.push_back(cast<ConstantInt>(CA->getOperand(i))->getZExtValue());
+
+ AP.OutStreamer.EmitBytes(StringRef(TmpVec.data(), TmpVec.size()), AddrSpace);
}
static void EmitGlobalConstantVector(const ConstantVector *CV,
return;
}
- // Otherwise, it must be a ConstantExpr. Emit the data directive, then emit
- // the expression value.
- switch (TM.getTargetData()->getTypeAllocSize(CV->getType())) {
- case 0: return;
- case 1: O << MAI->getData8bitsDirective(AddrSpace); break;
- case 2: O << MAI->getData16bitsDirective(AddrSpace); break;
- case 4: O << MAI->getData32bitsDirective(AddrSpace); break;
- case 8:
- if (const char *Dir = MAI->getData64bitsDirective(AddrSpace)) {
- O << Dir;
- break;
- }
- // FALL THROUGH.
- default:
- llvm_unreachable("Target cannot handle given data directive width!");
- return;
- }
-
- EmitConstantValueOnly(CV);
- O << '\n';
+ // Otherwise, it must be a ConstantExpr. Lower it to an MCExpr, then emit it
+ // thread the streamer with EmitValue.
+ OutStreamer.EmitValue(LowerConstant(CV, *this),
+ TM.getTargetData()->getTypeAllocSize(CV->getType()),
+ AddrSpace);
}
void AsmPrinter::EmitMachineConstantPoolValue(MachineConstantPoolValue *MCPV) {
SmallString<60> Name;
raw_svector_ostream(Name) << MAI->getPrivateGlobalPrefix() << "BB"
<< getFunctionNumber() << '_' << MBBID;
-
+ return OutContext.GetOrCreateSymbol(Name.str());
+}
+
+/// GetCPISymbol - Return the symbol for the specified constant pool entry.
+MCSymbol *AsmPrinter::GetCPISymbol(unsigned CPID) const {
+ SmallString<60> Name;
+ raw_svector_ostream(Name) << MAI->getPrivateGlobalPrefix() << "CPI"
+ << getFunctionNumber() << '_' << CPID;
+ return OutContext.GetOrCreateSymbol(Name.str());
+}
+
+/// GetJTISymbol - Return the symbol for the specified jump table entry.
+MCSymbol *AsmPrinter::GetJTISymbol(unsigned JTID, bool isLinkerPrivate) const {
+ const char *Prefix = isLinkerPrivate ? MAI->getLinkerPrivateGlobalPrefix() :
+ MAI->getPrivateGlobalPrefix();
+ SmallString<60> Name;
+ raw_svector_ostream(Name) << Prefix << "JTI" << getFunctionNumber() << '_'
+ << JTID;
+ return OutContext.GetOrCreateSymbol(Name.str());
+}
+
+/// GetJTSetSymbol - Return the symbol for the specified jump table .set
+/// FIXME: privatize to AsmPrinter.
+MCSymbol *AsmPrinter::GetJTSetSymbol(unsigned UID, unsigned MBBID) const {
+ SmallString<60> Name;
+ raw_svector_ostream(Name) << MAI->getPrivateGlobalPrefix()
+ << getFunctionNumber() << '_' << UID << "_set_" << MBBID;
return OutContext.GetOrCreateSymbol(Name.str());
}
}
+
+/// PrintParentLoopComment - Print comments about parent loops of this one.
+static void PrintParentLoopComment(raw_ostream &OS, const MachineLoop *Loop,
+ unsigned FunctionNumber) {
+ if (Loop == 0) return;
+ PrintParentLoopComment(OS, Loop->getParentLoop(), FunctionNumber);
+ OS.indent(Loop->getLoopDepth()*2)
+ << "Parent Loop BB" << FunctionNumber << "_"
+ << Loop->getHeader()->getNumber()
+ << " Depth=" << Loop->getLoopDepth() << '\n';
+}
+
+
+/// PrintChildLoopComment - Print comments about child loops within
+/// the loop for this basic block, with nesting.
+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)
+ << "Child Loop BB" << FunctionNumber << "_"
+ << (*CL)->getHeader()->getNumber() << " Depth " << (*CL)->getLoopDepth()
+ << '\n';
+ PrintChildLoopComment(OS, *CL, FunctionNumber);
+ }
+}
+
+/// EmitComments - Pretty-print comments for basic blocks.
+static void PrintBasicBlockLoopComments(const MachineBasicBlock &MBB,
+ const MachineLoopInfo *LI,
+ const AsmPrinter &AP) {
+ // Add loop depth information
+ const MachineLoop *Loop = LI->getLoopFor(&MBB);
+ if (Loop == 0) return;
+
+ MachineBasicBlock *Header = Loop->getHeader();
+ assert(Header && "No header for loop");
+
+ // If this block is not a loop header, just print out what is the loop header
+ // and return.
+ if (Header != &MBB) {
+ AP.OutStreamer.AddComment(" in Loop: Header=BB" +
+ Twine(AP.getFunctionNumber())+"_" +
+ Twine(Loop->getHeader()->getNumber())+
+ " Depth="+Twine(Loop->getLoopDepth()));
+ return;
+ }
+
+ // Otherwise, it is a loop header. Print out information about child and
+ // parent loops.
+ raw_ostream &OS = AP.OutStreamer.GetCommentOS();
+
+ PrintParentLoopComment(OS, Loop->getParentLoop(), AP.getFunctionNumber());
+
+ OS << "=>";
+ OS.indent(Loop->getLoopDepth()*2-2);
+
+ OS << "This ";
+ if (Loop->empty())
+ OS << "Inner ";
+ OS << "Loop Header: Depth=" + Twine(Loop->getLoopDepth()) << '\n';
+
+ PrintChildLoopComment(OS, Loop, AP.getFunctionNumber());
+}
+
+
/// EmitBasicBlockStart - This method prints the label for the specified
/// MachineBasicBlock, an alignment (if present) and a comment describing
/// it if appropriate.
// Print the main label for the block.
if (MBB->pred_empty() || MBB->isOnlyReachableByFallthrough()) {
if (VerboseAsm) {
+ // NOTE: Want this comment at start of line.
O << MAI->getCommentString() << " BB#" << MBB->getNumber() << ':';
if (const BasicBlock *BB = MBB->getBasicBlock())
if (BB->hasName())
OutStreamer.AddComment("%" + BB->getName());
+
+ PrintBasicBlockLoopComments(*MBB, LI, *this);
OutStreamer.AddBlankLine();
}
} else {
if (const BasicBlock *BB = MBB->getBasicBlock())
if (BB->hasName())
OutStreamer.AddComment("%" + BB->getName());
+ PrintBasicBlockLoopComments(*MBB, LI, *this);
}
+
OutStreamer.EmitLabel(GetMBBSymbol(MBB->getNumber()));
}
-
- // Print some comments to accompany the label.
- // FIXME: REENABLE.
- if (0 && VerboseAsm) {
- EmitComments(*MBB);
- O << '\n';
- }
}
/// printPICJumpTableSetLabel - This method prints a set label for the
return;
O << MAI->getSetDirective() << ' ' << MAI->getPrivateGlobalPrefix()
- << getFunctionNumber() << '_' << uid << "_set_" << MBB->getNumber() << ','
- << *GetMBBSymbol(MBB->getNumber())
- << '-' << MAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber()
- << '_' << uid << '\n';
+ << *GetJTSetSymbol(uid, MBB->getNumber()) << ','
+ << *GetMBBSymbol(MBB->getNumber()) << '-' << *GetJTISymbol(uid) << '\n';
}
-void AsmPrinter::printPICJumpTableSetLabel(unsigned uid, unsigned uid2,
- const MachineBasicBlock *MBB) const {
- if (!MAI->getSetDirective())
- return;
+void AsmPrinter::printVisibility(MCSymbol *Sym, unsigned Visibility) const {
+ MCSymbolAttr Attr = MCSA_Invalid;
- O << MAI->getSetDirective() << ' ' << MAI->getPrivateGlobalPrefix()
- << getFunctionNumber() << '_' << uid << '_' << uid2
- << "_set_" << MBB->getNumber() << ','
- << *GetMBBSymbol(MBB->getNumber())
- << '-' << MAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber()
- << '_' << uid << '_' << uid2 << '\n';
-}
-
-void AsmPrinter::printVisibility(const MCSymbol *Sym,
- unsigned Visibility) const {
- if (Visibility == GlobalValue::HiddenVisibility) {
- if (const char *Directive = MAI->getHiddenDirective())
- O << Directive << *Sym << '\n';
- } else if (Visibility == GlobalValue::ProtectedVisibility) {
- if (const char *Directive = MAI->getProtectedDirective())
- O << Directive << *Sym << '\n';
+ switch (Visibility) {
+ default: break;
+ case GlobalValue::HiddenVisibility:
+ Attr = MAI->getHiddenVisibilityAttr();
+ break;
+ case GlobalValue::ProtectedVisibility:
+ Attr = MAI->getProtectedVisibilityAttr();
+ break;
}
+
+ if (Attr != MCSA_Invalid)
+ OutStreamer.EmitSymbolAttribute(Sym, Attr);
}
void AsmPrinter::printOffset(int64_t Offset) const {
return GMP;
}
- errs() << "no GCMetadataPrinter registered for GC: " << Name << "\n";
- llvm_unreachable(0);
+ llvm_report_error("no GCMetadataPrinter registered for GC: " + Twine(Name));
+ return 0;
}
/// EmitComments - Pretty-print comments for instructions
}
}
-/// PrintChildLoopComment - Print comments about child loops within
-/// the loop for this basic block, with nesting.
-///
-static void PrintChildLoopComment(formatted_raw_ostream &O,
- const MachineLoop *loop,
- const MCAsmInfo *MAI,
- int FunctionNumber) {
- // Add child loop information
- for(MachineLoop::iterator cl = loop->begin(),
- clend = loop->end();
- cl != clend;
- ++cl) {
- MachineBasicBlock *Header = (*cl)->getHeader();
- assert(Header && "No header for loop");
-
- O << '\n';
- O.PadToColumn(MAI->getCommentColumn());
-
- O << MAI->getCommentString();
- O.indent(((*cl)->getLoopDepth()-1)*2)
- << " Child Loop BB" << FunctionNumber << "_"
- << Header->getNumber() << " Depth " << (*cl)->getLoopDepth();
-
- PrintChildLoopComment(O, *cl, MAI, FunctionNumber);
- }
-}
-
-/// EmitComments - Pretty-print comments for basic blocks
-void AsmPrinter::EmitComments(const MachineBasicBlock &MBB) const {
- if (VerboseAsm) {
- // Add loop depth information
- const MachineLoop *loop = LI->getLoopFor(&MBB);
-
- if (loop) {
- // Print a newline after bb# annotation.
- O << "\n";
- O.PadToColumn(MAI->getCommentColumn());
- O << MAI->getCommentString() << " Loop Depth " << loop->getLoopDepth()
- << '\n';
-
- O.PadToColumn(MAI->getCommentColumn());
-
- MachineBasicBlock *Header = loop->getHeader();
- assert(Header && "No header for loop");
-
- if (Header == &MBB) {
- O << MAI->getCommentString() << " Loop Header";
- PrintChildLoopComment(O, loop, MAI, getFunctionNumber());
- }
- else {
- O << MAI->getCommentString() << " Loop Header is BB"
- << getFunctionNumber() << "_" << loop->getHeader()->getNumber();
- }
-
- if (loop->empty()) {
- O << '\n';
- O.PadToColumn(MAI->getCommentColumn());
- O << MAI->getCommentString() << " Inner Loop";
- }
-
- // Add parent loop information
- for (const MachineLoop *CurLoop = loop->getParentLoop();
- CurLoop;
- CurLoop = CurLoop->getParentLoop()) {
- MachineBasicBlock *Header = CurLoop->getHeader();
- assert(Header && "No header for loop");
-
- O << '\n';
- O.PadToColumn(MAI->getCommentColumn());
- O << MAI->getCommentString();
- O.indent((CurLoop->getLoopDepth()-1)*2)
- << " Inside Loop BB" << getFunctionNumber() << "_"
- << Header->getNumber() << " Depth " << CurLoop->getLoopDepth();
- }
- }
- }
-}
projects / oota-llvm.git / blobdiff