//===----------------------------------------------------------------------===//
#include "X86AsmPrinter.h"
+#include "X86RegisterInfo.h"
#include "InstPrinter/X86ATTInstPrinter.h"
-#include "X86COFFMachineModuleInfo.h"
+#include "MCTargetDesc/X86BaseInfo.h"
+#include "Utils/X86ShuffleDecode.h"
#include "llvm/ADT/SmallString.h"
+#include "llvm/CodeGen/MachineFunction.h"
+#include "llvm/CodeGen/MachineConstantPool.h"
+#include "llvm/CodeGen/MachineOperand.h"
#include "llvm/CodeGen/MachineModuleInfoImpls.h"
#include "llvm/CodeGen/StackMaps.h"
-#include "llvm/IR/Type.h"
+#include "llvm/IR/DataLayout.h"
+#include "llvm/IR/GlobalValue.h"
+#include "llvm/IR/Mangler.h"
#include "llvm/MC/MCAsmInfo.h"
+#include "llvm/MC/MCCodeEmitter.h"
#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCExpr.h"
#include "llvm/MC/MCInst.h"
#include "llvm/MC/MCInstBuilder.h"
#include "llvm/MC/MCStreamer.h"
#include "llvm/MC/MCSymbol.h"
-#include "llvm/Support/FormattedStream.h"
-#include "llvm/Target/Mangler.h"
+#include "llvm/Support/TargetRegistry.h"
using namespace llvm;
namespace {
} // end anonymous namespace
+// Emit a minimal sequence of nops spanning NumBytes bytes.
+static void EmitNops(MCStreamer &OS, unsigned NumBytes, bool Is64Bit,
+ const MCSubtargetInfo &STI);
+
+namespace llvm {
+ X86AsmPrinter::StackMapShadowTracker::StackMapShadowTracker(TargetMachine &TM)
+ : TM(TM), InShadow(false), RequiredShadowSize(0), CurrentShadowSize(0) {}
+
+ X86AsmPrinter::StackMapShadowTracker::~StackMapShadowTracker() {}
+
+ void
+ X86AsmPrinter::StackMapShadowTracker::startFunction(MachineFunction &MF) {
+ CodeEmitter.reset(TM.getTarget().createMCCodeEmitter(
+ *TM.getSubtargetImpl()->getInstrInfo(),
+ *TM.getSubtargetImpl()->getRegisterInfo(), *TM.getSubtargetImpl(),
+ MF.getContext()));
+ }
+
+ void X86AsmPrinter::StackMapShadowTracker::count(MCInst &Inst,
+ const MCSubtargetInfo &STI) {
+ if (InShadow) {
+ SmallString<256> Code;
+ SmallVector<MCFixup, 4> Fixups;
+ raw_svector_ostream VecOS(Code);
+ CodeEmitter->EncodeInstruction(Inst, VecOS, Fixups, STI);
+ VecOS.flush();
+ CurrentShadowSize += Code.size();
+ if (CurrentShadowSize >= RequiredShadowSize)
+ InShadow = false; // The shadow is big enough. Stop counting.
+ }
+ }
+
+ void X86AsmPrinter::StackMapShadowTracker::emitShadowPadding(
+ MCStreamer &OutStreamer, const MCSubtargetInfo &STI) {
+ if (InShadow && CurrentShadowSize < RequiredShadowSize) {
+ InShadow = false;
+ EmitNops(OutStreamer, RequiredShadowSize - CurrentShadowSize,
+ TM.getSubtarget<X86Subtarget>().is64Bit(), STI);
+ }
+ }
+
+ void X86AsmPrinter::EmitAndCountInstruction(MCInst &Inst) {
+ OutStreamer.EmitInstruction(Inst, getSubtargetInfo());
+ SMShadowTracker.count(Inst, getSubtargetInfo());
+ }
+} // end llvm namespace
+
X86MCInstLower::X86MCInstLower(const MachineFunction &mf,
X86AsmPrinter &asmprinter)
: Ctx(mf.getContext()), MF(mf), TM(mf.getTarget()),
/// operand to an MCSymbol.
MCSymbol *X86MCInstLower::
GetSymbolFromOperand(const MachineOperand &MO) const {
+ const DataLayout *DL = TM.getSubtargetImpl()->getDataLayout();
assert((MO.isGlobal() || MO.isSymbol() || MO.isMBB()) && "Isn't a symbol reference");
SmallString<128> Name;
+ StringRef Suffix;
+
+ switch (MO.getTargetFlags()) {
+ case X86II::MO_DLLIMPORT:
+ // Handle dllimport linkage.
+ Name += "__imp_";
+ break;
+ case X86II::MO_DARWIN_STUB:
+ Suffix = "$stub";
+ break;
+ case X86II::MO_DARWIN_NONLAZY:
+ case X86II::MO_DARWIN_NONLAZY_PIC_BASE:
+ case X86II::MO_DARWIN_HIDDEN_NONLAZY_PIC_BASE:
+ Suffix = "$non_lazy_ptr";
+ break;
+ }
+
+ if (!Suffix.empty())
+ Name += DL->getPrivateGlobalPrefix();
+
+ unsigned PrefixLen = Name.size();
if (MO.isGlobal()) {
const GlobalValue *GV = MO.getGlobal();
- bool isImplicitlyPrivate = false;
- if (MO.getTargetFlags() == X86II::MO_DARWIN_STUB ||
- MO.getTargetFlags() == X86II::MO_DARWIN_NONLAZY ||
- MO.getTargetFlags() == X86II::MO_DARWIN_NONLAZY_PIC_BASE ||
- MO.getTargetFlags() == X86II::MO_DARWIN_HIDDEN_NONLAZY_PIC_BASE)
- isImplicitlyPrivate = true;
-
- getMang()->getNameWithPrefix(Name, GV, isImplicitlyPrivate);
+ AsmPrinter.getNameWithPrefix(Name, GV);
} else if (MO.isSymbol()) {
- Name += MAI.getGlobalPrefix();
- Name += MO.getSymbolName();
+ getMang()->getNameWithPrefix(Name, MO.getSymbolName());
} else if (MO.isMBB()) {
Name += MO.getMBB()->getSymbol()->getName();
}
+ unsigned OrigLen = Name.size() - PrefixLen;
+
+ Name += Suffix;
+ MCSymbol *Sym = Ctx.GetOrCreateSymbol(Name);
+
+ StringRef OrigName = StringRef(Name).substr(PrefixLen, OrigLen);
// If the target flags on the operand changes the name of the symbol, do that
// before we return the symbol.
switch (MO.getTargetFlags()) {
default: break;
- case X86II::MO_DLLIMPORT: {
- // Handle dllimport linkage.
- const char *Prefix = "__imp_";
- Name.insert(Name.begin(), Prefix, Prefix+strlen(Prefix));
- break;
- }
case X86II::MO_DARWIN_NONLAZY:
case X86II::MO_DARWIN_NONLAZY_PIC_BASE: {
- Name += "$non_lazy_ptr";
- MCSymbol *Sym = Ctx.GetOrCreateSymbol(Name.str());
-
MachineModuleInfoImpl::StubValueTy &StubSym =
getMachOMMI().getGVStubEntry(Sym);
- if (StubSym.getPointer() == 0) {
+ if (!StubSym.getPointer()) {
assert(MO.isGlobal() && "Extern symbol not handled yet");
StubSym =
MachineModuleInfoImpl::
StubValueTy(AsmPrinter.getSymbol(MO.getGlobal()),
!MO.getGlobal()->hasInternalLinkage());
}
- return Sym;
+ break;
}
case X86II::MO_DARWIN_HIDDEN_NONLAZY_PIC_BASE: {
- Name += "$non_lazy_ptr";
- MCSymbol *Sym = Ctx.GetOrCreateSymbol(Name.str());
MachineModuleInfoImpl::StubValueTy &StubSym =
getMachOMMI().getHiddenGVStubEntry(Sym);
- if (StubSym.getPointer() == 0) {
+ if (!StubSym.getPointer()) {
assert(MO.isGlobal() && "Extern symbol not handled yet");
StubSym =
MachineModuleInfoImpl::
StubValueTy(AsmPrinter.getSymbol(MO.getGlobal()),
!MO.getGlobal()->hasInternalLinkage());
}
- return Sym;
+ break;
}
case X86II::MO_DARWIN_STUB: {
- Name += "$stub";
- MCSymbol *Sym = Ctx.GetOrCreateSymbol(Name.str());
MachineModuleInfoImpl::StubValueTy &StubSym =
getMachOMMI().getFnStubEntry(Sym);
if (StubSym.getPointer())
StubValueTy(AsmPrinter.getSymbol(MO.getGlobal()),
!MO.getGlobal()->hasInternalLinkage());
} else {
- Name.erase(Name.end()-5, Name.end());
StubSym =
MachineModuleInfoImpl::
- StubValueTy(Ctx.GetOrCreateSymbol(Name.str()), false);
+ StubValueTy(Ctx.GetOrCreateSymbol(OrigName), false);
}
- return Sym;
+ break;
}
}
- return Ctx.GetOrCreateSymbol(Name.str());
+ return Sym;
}
MCOperand X86MCInstLower::LowerSymbolOperand(const MachineOperand &MO,
MCSymbol *Sym) const {
// FIXME: We would like an efficient form for this, so we don't have to do a
// lot of extra uniquing.
- const MCExpr *Expr = 0;
+ const MCExpr *Expr = nullptr;
MCSymbolRefExpr::VariantKind RefKind = MCSymbolRefExpr::VK_None;
switch (MO.getTargetFlags()) {
Expr = MCBinaryExpr::CreateSub(Expr,
MCSymbolRefExpr::Create(MF.getPICBaseSymbol(), Ctx),
Ctx);
- if (MO.isJTI() && MAI.hasSetDirective()) {
+ if (MO.isJTI()) {
+ assert(MAI.doesSetDirectiveSuppressesReloc());
// If .set directive is supported, use it to reduce the number of
// relocations the assembler will generate for differences between
// local labels. This is only safe when the symbols are in the same
break;
}
- if (Expr == 0)
+ if (!Expr)
Expr = MCSymbolRefExpr::Create(Sym, RefKind, Ctx);
if (!MO.isJTI() && !MO.isMBB() && MO.getOffset())
}
-/// LowerUnaryToTwoAddr - R = setb -> R = sbb R, R
-static void LowerUnaryToTwoAddr(MCInst &OutMI, unsigned NewOpc) {
- OutMI.setOpcode(NewOpc);
- OutMI.addOperand(OutMI.getOperand(0));
- OutMI.addOperand(OutMI.getOperand(0));
-}
-
/// \brief Simplify FOO $imm, %{al,ax,eax,rax} to FOO $imm, for instruction with
/// a short fixed-register form.
static void SimplifyShortImmForm(MCInst &Inst, unsigned Opcode) {
unsigned RegOp = IsStore ? 0 : 5;
unsigned AddrOp = AddrBase + 3;
assert(Inst.getNumOperands() == 6 && Inst.getOperand(RegOp).isReg() &&
- Inst.getOperand(AddrBase + 0).isReg() && // base
- Inst.getOperand(AddrBase + 1).isImm() && // scale
- Inst.getOperand(AddrBase + 2).isReg() && // index register
- (Inst.getOperand(AddrOp).isExpr() || // address
- Inst.getOperand(AddrOp).isImm())&&
- Inst.getOperand(AddrBase + 4).isReg() && // segment
+ Inst.getOperand(AddrBase + X86::AddrBaseReg).isReg() &&
+ Inst.getOperand(AddrBase + X86::AddrScaleAmt).isImm() &&
+ Inst.getOperand(AddrBase + X86::AddrIndexReg).isReg() &&
+ Inst.getOperand(AddrBase + X86::AddrSegmentReg).isReg() &&
+ (Inst.getOperand(AddrOp).isExpr() ||
+ Inst.getOperand(AddrOp).isImm()) &&
"Unexpected instruction!");
// Check whether the destination register can be fixed.
}
if (Absolute &&
- (Inst.getOperand(AddrBase + 0).getReg() != 0 ||
- Inst.getOperand(AddrBase + 2).getReg() != 0 ||
- Inst.getOperand(AddrBase + 4).getReg() != 0 ||
- Inst.getOperand(AddrBase + 1).getImm() != 1))
+ (Inst.getOperand(AddrBase + X86::AddrBaseReg).getReg() != 0 ||
+ Inst.getOperand(AddrBase + X86::AddrScaleAmt).getImm() != 1 ||
+ Inst.getOperand(AddrBase + X86::AddrIndexReg).getReg() != 0))
return;
// If so, rewrite the instruction.
MCOperand Saved = Inst.getOperand(AddrOp);
+ MCOperand Seg = Inst.getOperand(AddrBase + X86::AddrSegmentReg);
Inst = MCInst();
Inst.setOpcode(Opcode);
Inst.addOperand(Saved);
+ Inst.addOperand(Seg);
+}
+
+static unsigned getRetOpcode(const X86Subtarget &Subtarget)
+{
+ return Subtarget.is64Bit() ? X86::RETQ : X86::RETL;
}
void X86MCInstLower::Lower(const MachineInstr *MI, MCInst &OutMI) const {
assert(OutMI.getOperand(1+X86::AddrSegmentReg).getReg() == 0 &&
"LEA has segment specified!");
break;
- case X86::MOV32r0: LowerUnaryToTwoAddr(OutMI, X86::XOR32rr); break;
case X86::MOV32ri64:
OutMI.setOpcode(X86::MOV32ri);
case X86::EH_RETURN:
case X86::EH_RETURN64: {
OutMI = MCInst();
- OutMI.setOpcode(X86::RET);
+ OutMI.setOpcode(getRetOpcode(AsmPrinter.getSubtarget()));
break;
}
// Atomic load and store require a separate pseudo-inst because Acquire
// implies mayStore and Release implies mayLoad; fix these to regular MOV
// instructions here
- case X86::ACQUIRE_MOV8rm: OutMI.setOpcode(X86::MOV8rm); goto ReSimplify;
- case X86::ACQUIRE_MOV16rm: OutMI.setOpcode(X86::MOV16rm); goto ReSimplify;
- case X86::ACQUIRE_MOV32rm: OutMI.setOpcode(X86::MOV32rm); goto ReSimplify;
- case X86::ACQUIRE_MOV64rm: OutMI.setOpcode(X86::MOV64rm); goto ReSimplify;
- case X86::RELEASE_MOV8mr: OutMI.setOpcode(X86::MOV8mr); goto ReSimplify;
- case X86::RELEASE_MOV16mr: OutMI.setOpcode(X86::MOV16mr); goto ReSimplify;
- case X86::RELEASE_MOV32mr: OutMI.setOpcode(X86::MOV32mr); goto ReSimplify;
- case X86::RELEASE_MOV64mr: OutMI.setOpcode(X86::MOV64mr); goto ReSimplify;
+ case X86::ACQUIRE_MOV8rm: OutMI.setOpcode(X86::MOV8rm); goto ReSimplify;
+ case X86::ACQUIRE_MOV16rm: OutMI.setOpcode(X86::MOV16rm); goto ReSimplify;
+ case X86::ACQUIRE_MOV32rm: OutMI.setOpcode(X86::MOV32rm); goto ReSimplify;
+ case X86::ACQUIRE_MOV64rm: OutMI.setOpcode(X86::MOV64rm); goto ReSimplify;
+ case X86::RELEASE_MOV8mr: OutMI.setOpcode(X86::MOV8mr); goto ReSimplify;
+ case X86::RELEASE_MOV16mr: OutMI.setOpcode(X86::MOV16mr); goto ReSimplify;
+ case X86::RELEASE_MOV32mr: OutMI.setOpcode(X86::MOV32mr); goto ReSimplify;
+ case X86::RELEASE_MOV64mr: OutMI.setOpcode(X86::MOV64mr); goto ReSimplify;
+ case X86::RELEASE_MOV8mi: OutMI.setOpcode(X86::MOV8mi); goto ReSimplify;
+ case X86::RELEASE_MOV16mi: OutMI.setOpcode(X86::MOV16mi); goto ReSimplify;
+ case X86::RELEASE_MOV32mi: OutMI.setOpcode(X86::MOV32mi); goto ReSimplify;
+ case X86::RELEASE_MOV64mi32: OutMI.setOpcode(X86::MOV64mi32); goto ReSimplify;
+ case X86::RELEASE_ADD8mi: OutMI.setOpcode(X86::ADD8mi); goto ReSimplify;
+ case X86::RELEASE_ADD32mi: OutMI.setOpcode(X86::ADD32mi); goto ReSimplify;
+ case X86::RELEASE_ADD64mi32: OutMI.setOpcode(X86::ADD64mi32); goto ReSimplify;
+ case X86::RELEASE_AND8mi: OutMI.setOpcode(X86::AND8mi); goto ReSimplify;
+ case X86::RELEASE_AND32mi: OutMI.setOpcode(X86::AND32mi); goto ReSimplify;
+ case X86::RELEASE_AND64mi32: OutMI.setOpcode(X86::AND64mi32); goto ReSimplify;
+ case X86::RELEASE_OR8mi: OutMI.setOpcode(X86::OR8mi); goto ReSimplify;
+ case X86::RELEASE_OR32mi: OutMI.setOpcode(X86::OR32mi); goto ReSimplify;
+ case X86::RELEASE_OR64mi32: OutMI.setOpcode(X86::OR64mi32); goto ReSimplify;
+ case X86::RELEASE_XOR8mi: OutMI.setOpcode(X86::XOR8mi); goto ReSimplify;
+ case X86::RELEASE_XOR32mi: OutMI.setOpcode(X86::XOR32mi); goto ReSimplify;
+ case X86::RELEASE_XOR64mi32: OutMI.setOpcode(X86::XOR64mi32); goto ReSimplify;
+ case X86::RELEASE_INC8m: OutMI.setOpcode(X86::INC8m); goto ReSimplify;
+ case X86::RELEASE_INC16m: OutMI.setOpcode(X86::INC16m); goto ReSimplify;
+ case X86::RELEASE_INC32m: OutMI.setOpcode(X86::INC32m); goto ReSimplify;
+ case X86::RELEASE_INC64m: OutMI.setOpcode(X86::INC64m); goto ReSimplify;
+ case X86::RELEASE_DEC8m: OutMI.setOpcode(X86::DEC8m); goto ReSimplify;
+ case X86::RELEASE_DEC16m: OutMI.setOpcode(X86::DEC16m); goto ReSimplify;
+ case X86::RELEASE_DEC32m: OutMI.setOpcode(X86::DEC32m); goto ReSimplify;
+ case X86::RELEASE_DEC64m: OutMI.setOpcode(X86::DEC64m); goto ReSimplify;
// We don't currently select the correct instruction form for instructions
// which have a short %eax, etc. form. Handle this by custom lowering, for
case X86::MOVSX64rr32:
SimplifyMOVSX(OutMI);
break;
-
- case X86::MORESTACK_RET:
- OutMI.setOpcode(X86::RET);
- break;
-
- case X86::MORESTACK_RET_RESTORE_R10:
- OutMI.setOpcode(X86::MOV64rr);
- OutMI.addOperand(MCOperand::CreateReg(X86::R10));
- OutMI.addOperand(MCOperand::CreateReg(X86::RAX));
-
- AsmPrinter.OutStreamer.EmitInstruction(MCInstBuilder(X86::RET));
- break;
}
}
-static void LowerTlsAddr(MCStreamer &OutStreamer,
- X86MCInstLower &MCInstLowering,
- const MachineInstr &MI) {
+void X86AsmPrinter::LowerTlsAddr(X86MCInstLower &MCInstLowering,
+ const MachineInstr &MI) {
bool is64Bits = MI.getOpcode() == X86::TLS_addr64 ||
MI.getOpcode() == X86::TLS_base_addr64;
MCContext &context = OutStreamer.getContext();
if (needsPadding)
- OutStreamer.EmitInstruction(MCInstBuilder(X86::DATA16_PREFIX));
+ EmitAndCountInstruction(MCInstBuilder(X86::DATA16_PREFIX));
MCSymbolRefExpr::VariantKind SRVK;
switch (MI.getOpcode()) {
LEA.addOperand(MCOperand::CreateExpr(symRef)); // disp
LEA.addOperand(MCOperand::CreateReg(0)); // seg
}
- OutStreamer.EmitInstruction(LEA);
+ EmitAndCountInstruction(LEA);
if (needsPadding) {
- OutStreamer.EmitInstruction(MCInstBuilder(X86::DATA16_PREFIX));
- OutStreamer.EmitInstruction(MCInstBuilder(X86::DATA16_PREFIX));
- OutStreamer.EmitInstruction(MCInstBuilder(X86::REX64_PREFIX));
+ EmitAndCountInstruction(MCInstBuilder(X86::DATA16_PREFIX));
+ EmitAndCountInstruction(MCInstBuilder(X86::DATA16_PREFIX));
+ EmitAndCountInstruction(MCInstBuilder(X86::REX64_PREFIX));
}
StringRef name = is64Bits ? "__tls_get_addr" : "___tls_get_addr";
MCSymbolRefExpr::VK_PLT,
context);
- OutStreamer.EmitInstruction(MCInstBuilder(is64Bits ? X86::CALL64pcrel32
- : X86::CALLpcrel32)
- .addExpr(tlsRef));
+ EmitAndCountInstruction(MCInstBuilder(is64Bits ? X86::CALL64pcrel32
+ : X86::CALLpcrel32)
+ .addExpr(tlsRef));
}
-static std::pair<StackMaps::Location, MachineInstr::const_mop_iterator>
-parseMemoryOperand(StackMaps::Location::LocationType LocTy,
- MachineInstr::const_mop_iterator MOI,
- MachineInstr::const_mop_iterator MOE) {
-
- typedef StackMaps::Location Location;
-
- assert(std::distance(MOI, MOE) >= 5 && "Too few operands to encode mem op.");
+/// \brief Emit the optimal amount of multi-byte nops on X86.
+static void EmitNops(MCStreamer &OS, unsigned NumBytes, bool Is64Bit, const MCSubtargetInfo &STI) {
+ // This works only for 64bit. For 32bit we have to do additional checking if
+ // the CPU supports multi-byte nops.
+ assert(Is64Bit && "EmitNops only supports X86-64");
+ while (NumBytes) {
+ unsigned Opc, BaseReg, ScaleVal, IndexReg, Displacement, SegmentReg;
+ Opc = IndexReg = Displacement = SegmentReg = 0;
+ BaseReg = X86::RAX; ScaleVal = 1;
+ switch (NumBytes) {
+ case 0: llvm_unreachable("Zero nops?"); break;
+ case 1: NumBytes -= 1; Opc = X86::NOOP; break;
+ case 2: NumBytes -= 2; Opc = X86::XCHG16ar; break;
+ case 3: NumBytes -= 3; Opc = X86::NOOPL; break;
+ case 4: NumBytes -= 4; Opc = X86::NOOPL; Displacement = 8; break;
+ case 5: NumBytes -= 5; Opc = X86::NOOPL; Displacement = 8;
+ IndexReg = X86::RAX; break;
+ case 6: NumBytes -= 6; Opc = X86::NOOPW; Displacement = 8;
+ IndexReg = X86::RAX; break;
+ case 7: NumBytes -= 7; Opc = X86::NOOPL; Displacement = 512; break;
+ case 8: NumBytes -= 8; Opc = X86::NOOPL; Displacement = 512;
+ IndexReg = X86::RAX; break;
+ case 9: NumBytes -= 9; Opc = X86::NOOPW; Displacement = 512;
+ IndexReg = X86::RAX; break;
+ default: NumBytes -= 10; Opc = X86::NOOPW; Displacement = 512;
+ IndexReg = X86::RAX; SegmentReg = X86::CS; break;
+ }
- const MachineOperand &Base = *MOI;
- const MachineOperand &Scale = *(++MOI);
- const MachineOperand &Index = *(++MOI);
- const MachineOperand &Disp = *(++MOI);
- const MachineOperand &ZeroReg = *(++MOI);
+ unsigned NumPrefixes = std::min(NumBytes, 5U);
+ NumBytes -= NumPrefixes;
+ for (unsigned i = 0; i != NumPrefixes; ++i)
+ OS.EmitBytes("\x66");
- // Sanity check for supported operand format.
- assert(Base.isReg() &&
- Scale.isImm() && Scale.getImm() == 1 &&
- Index.isReg() && Index.getReg() == 0 &&
- Disp.isImm() && ZeroReg.isReg() && (ZeroReg.getReg() == 0) &&
- "Unsupported x86 memory operand sequence.");
+ switch (Opc) {
+ default: llvm_unreachable("Unexpected opcode"); break;
+ case X86::NOOP:
+ OS.EmitInstruction(MCInstBuilder(Opc), STI);
+ break;
+ case X86::XCHG16ar:
+ OS.EmitInstruction(MCInstBuilder(Opc).addReg(X86::AX), STI);
+ break;
+ case X86::NOOPL:
+ case X86::NOOPW:
+ OS.EmitInstruction(MCInstBuilder(Opc).addReg(BaseReg)
+ .addImm(ScaleVal).addReg(IndexReg)
+ .addImm(Displacement).addReg(SegmentReg), STI);
+ break;
+ }
+ } // while (NumBytes)
+}
- return std::make_pair(
- Location(LocTy, Base.getReg(), Disp.getImm()), ++MOI);
+// Lower a stackmap of the form:
+// <id>, <shadowBytes>, ...
+void X86AsmPrinter::LowerSTACKMAP(const MachineInstr &MI) {
+ SMShadowTracker.emitShadowPadding(OutStreamer, getSubtargetInfo());
+ SM.recordStackMap(MI);
+ unsigned NumShadowBytes = MI.getOperand(1).getImm();
+ SMShadowTracker.reset(NumShadowBytes);
}
-std::pair<StackMaps::Location, MachineInstr::const_mop_iterator>
-X86AsmPrinter::stackmapOperandParser(MachineInstr::const_mop_iterator MOI,
- MachineInstr::const_mop_iterator MOE) {
-
- typedef StackMaps::Location Location;
-
- const MachineOperand &MOP = *MOI;
- assert(!MOP.isRegMask() && (!MOP.isReg() || !MOP.isImplicit()) &&
- "Register mask and implicit operands should not be processed.");
-
- if (MOP.isImm()) {
- switch (MOP.getImm()) {
- default: llvm_unreachable("Unrecognized operand type.");
- case StackMaps::DirectMemRefOp:
- return parseMemoryOperand(StackMaps::Location::Direct,
- llvm::next(MOI), MOE);
- case StackMaps::IndirectMemRefOp:
- return parseMemoryOperand(StackMaps::Location::Indirect,
- llvm::next(MOI), MOE);
- case StackMaps::ConstantOp: {
- ++MOI;
- assert(MOI->isImm() && "Expected constant operand.");
- int64_t Imm = MOI->getImm();
- return std::make_pair(Location(Location::Constant, 0, Imm), ++MOI);
- }
- }
+// Lower a patchpoint of the form:
+// [<def>], <id>, <numBytes>, <target>, <numArgs>, <cc>, ...
+void X86AsmPrinter::LowerPATCHPOINT(const MachineInstr &MI) {
+ assert(Subtarget->is64Bit() && "Patchpoint currently only supports X86-64");
+
+ SMShadowTracker.emitShadowPadding(OutStreamer, getSubtargetInfo());
+
+ SM.recordPatchPoint(MI);
+
+ PatchPointOpers opers(&MI);
+ unsigned ScratchIdx = opers.getNextScratchIdx();
+ unsigned EncodedBytes = 0;
+ int64_t CallTarget = opers.getMetaOper(PatchPointOpers::TargetPos).getImm();
+ if (CallTarget) {
+ // Emit MOV to materialize the target address and the CALL to target.
+ // This is encoded with 12-13 bytes, depending on which register is used.
+ unsigned ScratchReg = MI.getOperand(ScratchIdx).getReg();
+ if (X86II::isX86_64ExtendedReg(ScratchReg))
+ EncodedBytes = 13;
+ else
+ EncodedBytes = 12;
+ EmitAndCountInstruction(MCInstBuilder(X86::MOV64ri).addReg(ScratchReg)
+ .addImm(CallTarget));
+ EmitAndCountInstruction(MCInstBuilder(X86::CALL64r).addReg(ScratchReg));
}
+ // Emit padding.
+ unsigned NumBytes = opers.getMetaOper(PatchPointOpers::NBytesPos).getImm();
+ assert(NumBytes >= EncodedBytes &&
+ "Patchpoint can't request size less than the length of a call.");
- // Otherwise this is a reg operand.
- assert(MOP.isReg() && "Expected register operand here.");
- assert(TargetRegisterInfo::isPhysicalRegister(MOP.getReg()) &&
- "Virtreg operands should have been rewritten before now.");
- return std::make_pair(Location(Location::Register, MOP.getReg(), 0), ++MOI);
+ EmitNops(OutStreamer, NumBytes - EncodedBytes, Subtarget->is64Bit(),
+ getSubtargetInfo());
}
-static MachineInstr::const_mop_iterator
-getStackMapEndMOP(MachineInstr::const_mop_iterator MOI,
- MachineInstr::const_mop_iterator MOE) {
- for (; MOI != MOE; ++MOI)
- if (MOI->isRegMask() || (MOI->isReg() && MOI->isImplicit()))
- break;
-
- return MOI;
+// Returns instruction preceding MBBI in MachineFunction.
+// If MBBI is the first instruction of the first basic block, returns null.
+static MachineBasicBlock::const_iterator
+PrevCrossBBInst(MachineBasicBlock::const_iterator MBBI) {
+ const MachineBasicBlock *MBB = MBBI->getParent();
+ while (MBBI == MBB->begin()) {
+ if (MBB == MBB->getParent()->begin())
+ return nullptr;
+ MBB = MBB->getPrevNode();
+ MBBI = MBB->end();
+ }
+ return --MBBI;
}
-static void LowerSTACKMAP(MCStreamer &OutStreamer,
- X86MCInstLower &MCInstLowering,
- StackMaps &SM,
- const MachineInstr &MI)
-{
- int64_t ID = MI.getOperand(0).getImm();
- unsigned NumNOPBytes = MI.getOperand(1).getImm();
-
- assert((int32_t)ID == ID && "Stack maps hold 32-bit IDs");
- SM.recordStackMap(MI, ID, llvm::next(MI.operands_begin(), 2),
- getStackMapEndMOP(MI.operands_begin(), MI.operands_end()));
- // Emit padding.
- for (unsigned i = 0; i < NumNOPBytes; ++i)
- OutStreamer.EmitInstruction(MCInstBuilder(X86::NOOP));
+static const Constant *getConstantFromPool(const MachineInstr &MI,
+ const MachineOperand &Op) {
+ if (!Op.isCPI())
+ return nullptr;
+
+ ArrayRef<MachineConstantPoolEntry> Constants =
+ MI.getParent()->getParent()->getConstantPool()->getConstants();
+ const MachineConstantPoolEntry &ConstantEntry =
+ Constants[Op.getIndex()];
+
+ // Bail if this is a machine constant pool entry, we won't be able to dig out
+ // anything useful.
+ if (ConstantEntry.isMachineConstantPoolEntry())
+ return nullptr;
+
+ auto *C = dyn_cast<Constant>(ConstantEntry.Val.ConstVal);
+ assert((!C || ConstantEntry.getType() == C->getType()) &&
+ "Expected a constant of the same type!");
+ return C;
}
-static void LowerPATCHPOINT(MCStreamer &OutStreamer,
- X86MCInstLower &MCInstLowering,
- StackMaps &SM,
- const MachineInstr &MI)
-{
- int64_t ID = MI.getOperand(0).getImm();
- assert((int32_t)ID == ID && "Stack maps hold 32-bit IDs");
-
- // Get the number of arguments participating in the call. This number was
- // adjusted during call lowering by subtracting stack args.
- int64_t StackMapIdx = MI.getOperand(3).getImm() + 4;
- assert(StackMapIdx <= MI.getNumOperands() && "Patchpoint dropped args.");
-
- SM.recordStackMap(MI, ID, llvm::next(MI.operands_begin(), StackMapIdx),
- getStackMapEndMOP(MI.operands_begin(), MI.operands_end()));
-
- // Emit call. We need to know how many bytes we encoded here.
- unsigned EncodedBytes = 2;
- OutStreamer.EmitInstruction(MCInstBuilder(X86::CALL64r)
- .addReg(MI.getOperand(2).getReg()));
-
- // Emit padding.
- unsigned NumNOPBytes = MI.getOperand(1).getImm();
- assert(NumNOPBytes >= EncodedBytes &&
- "Patchpoint can't request size less than the length of a call.");
+static std::string getShuffleComment(const MachineOperand &DstOp,
+ const MachineOperand &SrcOp,
+ ArrayRef<int> Mask) {
+ std::string Comment;
+
+ // Compute the name for a register. This is really goofy because we have
+ // multiple instruction printers that could (in theory) use different
+ // names. Fortunately most people use the ATT style (outside of Windows)
+ // and they actually agree on register naming here. Ultimately, this is
+ // a comment, and so its OK if it isn't perfect.
+ auto GetRegisterName = [](unsigned RegNum) -> StringRef {
+ return X86ATTInstPrinter::getRegisterName(RegNum);
+ };
+
+ StringRef DstName = DstOp.isReg() ? GetRegisterName(DstOp.getReg()) : "mem";
+ StringRef SrcName = SrcOp.isReg() ? GetRegisterName(SrcOp.getReg()) : "mem";
+
+ raw_string_ostream CS(Comment);
+ CS << DstName << " = ";
+ bool NeedComma = false;
+ bool InSrc = false;
+ for (int M : Mask) {
+ // Wrap up any prior entry...
+ if (M == SM_SentinelZero && InSrc) {
+ InSrc = false;
+ CS << "]";
+ }
+ if (NeedComma)
+ CS << ",";
+ else
+ NeedComma = true;
+
+ // Print this shuffle...
+ if (M == SM_SentinelZero) {
+ CS << "zero";
+ } else {
+ if (!InSrc) {
+ InSrc = true;
+ CS << SrcName << "[";
+ }
+ if (M == SM_SentinelUndef)
+ CS << "u";
+ else
+ CS << M;
+ }
+ }
+ if (InSrc)
+ CS << "]";
+ CS.flush();
- for (unsigned i = EncodedBytes; i < NumNOPBytes; ++i)
- OutStreamer.EmitInstruction(MCInstBuilder(X86::NOOP));
+ return Comment;
}
void X86AsmPrinter::EmitInstruction(const MachineInstr *MI) {
X86MCInstLower MCInstLowering(*MF, *this);
+ const X86RegisterInfo *RI = static_cast<const X86RegisterInfo *>(
+ TM.getSubtargetImpl()->getRegisterInfo());
+
switch (MI->getOpcode()) {
case TargetOpcode::DBG_VALUE:
llvm_unreachable("Should be handled target independently");
// Emit nothing here but a comment if we can.
case X86::Int_MemBarrier:
- if (OutStreamer.hasRawTextSupport())
- OutStreamer.EmitRawText(StringRef("\t#MEMBARRIER"));
+ OutStreamer.emitRawComment("MEMBARRIER");
return;
case X86::TLS_addr64:
case X86::TLS_base_addr32:
case X86::TLS_base_addr64:
- return LowerTlsAddr(OutStreamer, MCInstLowering, *MI);
+ return LowerTlsAddr(MCInstLowering, *MI);
case X86::MOVPC32r: {
// This is a pseudo op for a two instruction sequence with a label, which
MCSymbol *PICBase = MF->getPICBaseSymbol();
// FIXME: We would like an efficient form for this, so we don't have to do a
// lot of extra uniquing.
- OutStreamer.EmitInstruction(MCInstBuilder(X86::CALLpcrel32)
+ EmitAndCountInstruction(MCInstBuilder(X86::CALLpcrel32)
.addExpr(MCSymbolRefExpr::Create(PICBase, OutContext)));
// Emit the label.
OutStreamer.EmitLabel(PICBase);
// popl $reg
- OutStreamer.EmitInstruction(MCInstBuilder(X86::POP32r)
- .addReg(MI->getOperand(0).getReg()));
+ EmitAndCountInstruction(MCInstBuilder(X86::POP32r)
+ .addReg(MI->getOperand(0).getReg()));
return;
}
DotExpr = MCBinaryExpr::CreateAdd(MCSymbolRefExpr::Create(OpSym,OutContext),
DotExpr, OutContext);
- OutStreamer.EmitInstruction(MCInstBuilder(X86::ADD32ri)
+ EmitAndCountInstruction(MCInstBuilder(X86::ADD32ri)
.addReg(MI->getOperand(0).getReg())
.addReg(MI->getOperand(1).getReg())
.addExpr(DotExpr));
}
case TargetOpcode::STACKMAP:
- return LowerSTACKMAP(OutStreamer, MCInstLowering, SM, *MI);
+ return LowerSTACKMAP(*MI);
case TargetOpcode::PATCHPOINT:
- return LowerPATCHPOINT(OutStreamer, MCInstLowering, SM, *MI);
+ return LowerPATCHPOINT(*MI);
+
+ case X86::MORESTACK_RET:
+ EmitAndCountInstruction(MCInstBuilder(getRetOpcode(*Subtarget)));
+ return;
+
+ case X86::MORESTACK_RET_RESTORE_R10:
+ // Return, then restore R10.
+ EmitAndCountInstruction(MCInstBuilder(getRetOpcode(*Subtarget)));
+ EmitAndCountInstruction(MCInstBuilder(X86::MOV64rr)
+ .addReg(X86::R10)
+ .addReg(X86::RAX));
+ return;
+
+ case X86::SEH_PushReg:
+ OutStreamer.EmitWinCFIPushReg(RI->getSEHRegNum(MI->getOperand(0).getImm()));
+ return;
+
+ case X86::SEH_SaveReg:
+ OutStreamer.EmitWinCFISaveReg(RI->getSEHRegNum(MI->getOperand(0).getImm()),
+ MI->getOperand(1).getImm());
+ return;
+
+ case X86::SEH_SaveXMM:
+ OutStreamer.EmitWinCFISaveXMM(RI->getSEHRegNum(MI->getOperand(0).getImm()),
+ MI->getOperand(1).getImm());
+ return;
+
+ case X86::SEH_StackAlloc:
+ OutStreamer.EmitWinCFIAllocStack(MI->getOperand(0).getImm());
+ return;
+
+ case X86::SEH_SetFrame:
+ OutStreamer.EmitWinCFISetFrame(RI->getSEHRegNum(MI->getOperand(0).getImm()),
+ MI->getOperand(1).getImm());
+ return;
+
+ case X86::SEH_PushFrame:
+ OutStreamer.EmitWinCFIPushFrame(MI->getOperand(0).getImm());
+ return;
+
+ case X86::SEH_EndPrologue:
+ OutStreamer.EmitWinCFIEndProlog();
+ return;
+
+ case X86::SEH_Epilogue: {
+ MachineBasicBlock::const_iterator MBBI(MI);
+ // Check if preceded by a call and emit nop if so.
+ for (MBBI = PrevCrossBBInst(MBBI); MBBI; MBBI = PrevCrossBBInst(MBBI)) {
+ // Conservatively assume that pseudo instructions don't emit code and keep
+ // looking for a call. We may emit an unnecessary nop in some cases.
+ if (!MBBI->isPseudo()) {
+ if (MBBI->isCall())
+ EmitAndCountInstruction(MCInstBuilder(X86::NOOP));
+ break;
+ }
+ }
+ return;
+ }
+
+ // Lower PSHUFB and VPERMILP normally but add a comment if we can find
+ // a constant shuffle mask. We won't be able to do this at the MC layer
+ // because the mask isn't an immediate.
+ case X86::PSHUFBrm:
+ case X86::VPSHUFBrm:
+ case X86::VPSHUFBYrm: {
+ if (!OutStreamer.isVerboseAsm())
+ break;
+ assert(MI->getNumOperands() > 5 &&
+ "We should always have at least 5 operands!");
+ const MachineOperand &DstOp = MI->getOperand(0);
+ const MachineOperand &SrcOp = MI->getOperand(1);
+ const MachineOperand &MaskOp = MI->getOperand(5);
+
+ if (auto *C = getConstantFromPool(*MI, MaskOp)) {
+ SmallVector<int, 16> Mask;
+ DecodePSHUFBMask(C, Mask);
+ if (!Mask.empty())
+ OutStreamer.AddComment(getShuffleComment(DstOp, SrcOp, Mask));
+ }
+ break;
+ }
+ case X86::VPERMILPSrm:
+ case X86::VPERMILPDrm:
+ case X86::VPERMILPSYrm:
+ case X86::VPERMILPDYrm: {
+ if (!OutStreamer.isVerboseAsm())
+ break;
+ assert(MI->getNumOperands() > 5 &&
+ "We should always have at least 5 operands!");
+ const MachineOperand &DstOp = MI->getOperand(0);
+ const MachineOperand &SrcOp = MI->getOperand(1);
+ const MachineOperand &MaskOp = MI->getOperand(5);
+
+ if (auto *C = getConstantFromPool(*MI, MaskOp)) {
+ SmallVector<int, 16> Mask;
+ DecodeVPERMILPMask(C, Mask);
+ if (!Mask.empty())
+ OutStreamer.AddComment(getShuffleComment(DstOp, SrcOp, Mask));
+ }
+ break;
+ }
+
+ // For loads from a constant pool to a vector register, print the constant
+ // loaded.
+ case X86::MOVAPDrm:
+ case X86::VMOVAPDrm:
+ case X86::VMOVAPDYrm:
+ case X86::MOVUPDrm:
+ case X86::VMOVUPDrm:
+ case X86::VMOVUPDYrm:
+ case X86::MOVAPSrm:
+ case X86::VMOVAPSrm:
+ case X86::VMOVAPSYrm:
+ case X86::MOVUPSrm:
+ case X86::VMOVUPSrm:
+ case X86::VMOVUPSYrm:
+ case X86::MOVDQArm:
+ case X86::VMOVDQArm:
+ case X86::VMOVDQAYrm:
+ case X86::MOVDQUrm:
+ case X86::VMOVDQUrm:
+ case X86::VMOVDQUYrm:
+ if (!OutStreamer.isVerboseAsm())
+ break;
+ if (MI->getNumOperands() > 4)
+ if (auto *C = getConstantFromPool(*MI, MI->getOperand(4))) {
+ std::string Comment;
+ raw_string_ostream CS(Comment);
+ const MachineOperand &DstOp = MI->getOperand(0);
+ CS << X86ATTInstPrinter::getRegisterName(DstOp.getReg()) << " = ";
+ if (auto *CDS = dyn_cast<ConstantDataSequential>(C)) {
+ CS << "[";
+ for (int i = 0, NumElements = CDS->getNumElements(); i < NumElements; ++i) {
+ if (i != 0)
+ CS << ",";
+ if (CDS->getElementType()->isIntegerTy())
+ CS << CDS->getElementAsInteger(i);
+ else if (CDS->getElementType()->isFloatTy())
+ CS << CDS->getElementAsFloat(i);
+ else if (CDS->getElementType()->isDoubleTy())
+ CS << CDS->getElementAsDouble(i);
+ else
+ CS << "?";
+ }
+ CS << "]";
+ OutStreamer.AddComment(CS.str());
+ } else if (auto *CV = dyn_cast<ConstantVector>(C)) {
+ CS << "<";
+ for (int i = 0, NumOperands = CV->getNumOperands(); i < NumOperands; ++i) {
+ if (i != 0)
+ CS << ",";
+ Constant *COp = CV->getOperand(i);
+ if (isa<UndefValue>(COp)) {
+ CS << "u";
+ } else if (auto *CI = dyn_cast<ConstantInt>(COp)) {
+ CS << CI->getZExtValue();
+ } else if (auto *CF = dyn_cast<ConstantFP>(COp)) {
+ SmallString<32> Str;
+ CF->getValueAPF().toString(Str);
+ CS << Str;
+ } else {
+ CS << "?";
+ }
+ }
+ CS << ">";
+ OutStreamer.AddComment(CS.str());
+ }
+ }
+ break;
}
MCInst TmpInst;
MCInstLowering.Lower(MI, TmpInst);
- OutStreamer.EmitInstruction(TmpInst);
+ EmitAndCountInstruction(TmpInst);
+
+ // Stackmap shadows cannot include branch targets, so we can count the bytes
+ // in a call towards the shadow, but must flush the shadow immediately after
+ // to account for the return from the call.
+ if (MI->isCall())
+ SMShadowTracker.emitShadowPadding(OutStreamer, getSubtargetInfo());
}
projects / oota-llvm.git / blobdiff