#include "llvm/Support/CommandLine.h"
#include "llvm/Target/TargetOptions.h"
#include "llvm/Support/Debug.h"
+#include <cstdlib>
using namespace llvm;
MFI->hasVarSizedObjects() ||
MFI->isFrameAddressTaken() || MFI->hasInlineAsmWithSPAdjust() ||
MF.getInfo<X86MachineFunctionInfo>()->getForceFramePointer() ||
- MMI.callsUnwindInit() || MMI.callsEHReturn());
+ MMI.callsUnwindInit() || MMI.callsEHReturn() ||
+ MFI->hasStackMap() || MFI->hasPatchPoint());
}
static unsigned getSUBriOpcode(unsigned IsLP64, int64_t Imm) {
return false;
}
+void X86FrameLowering::getStackProbeFunction(const X86Subtarget &STI,
+ unsigned &CallOp,
+ const char *&Symbol) {
+ CallOp = STI.is64Bit() ? X86::W64ALLOCA : X86::CALLpcrel32;
+
+ if (STI.is64Bit()) {
+ if (STI.isTargetCygMing()) {
+ Symbol = "___chkstk_ms";
+ } else {
+ Symbol = "__chkstk";
+ }
+ } else if (STI.isTargetCygMing())
+ Symbol = "_alloca";
+ else
+ Symbol = "_chkstk";
+}
+
/// emitPrologue - Push callee-saved registers onto the stack, which
/// automatically adjust the stack pointer. Adjust the stack pointer to allocate
/// space for local variables. Also emit labels used by the exception handler to
X86FI->setCalleeSavedFrameSize(
X86FI->getCalleeSavedFrameSize() - TailCallReturnAddrDelta);
+ bool UseStackProbe = (STI.isOSWindows() && !STI.isTargetMacho());
+
// If this is x86-64 and the Red Zone is not disabled, if we are a leaf
// function, and use up to 128 bytes of stack space, don't have a frame
// pointer, calls, or dynamic alloca then we do not need to adjust the
// Adjust stack pointer: ESP -= numbytes.
+ static const size_t PageSize = 4096;
+
// Windows and cygwin/mingw require a prologue helper routine when allocating
// more than 4K bytes on the stack. Windows uses __chkstk and cygwin/mingw
// uses __alloca. __alloca and the 32-bit version of __chkstk will probe the
// responsible for adjusting the stack pointer. Touching the stack at 4K
// increments is necessary to ensure that the guard pages used by the OS
// virtual memory manager are allocated in correct sequence.
- if (NumBytes >= 4096 && STI.isOSWindows() && !STI.isTargetMacho()) {
+ if (NumBytes >= PageSize && UseStackProbe) {
const char *StackProbeSymbol;
+ unsigned CallOp;
- if (Is64Bit) {
- if (STI.isTargetCygMing()) {
- StackProbeSymbol = "___chkstk_ms";
- } else {
- StackProbeSymbol = "__chkstk";
- }
- } else if (STI.isTargetCygMing())
- StackProbeSymbol = "_alloca";
- else
- StackProbeSymbol = "_chkstk";
+ getStackProbeFunction(STI, CallOp, StackProbeSymbol);
// Check whether EAX is livein for this function.
bool isEAXAlive = isEAXLiveIn(MF);
}
BuildMI(MBB, MBBI, DL,
- TII.get(Is64Bit ? X86::W64ALLOCA : X86::CALLpcrel32))
+ TII.get(CallOp))
.addExternalSymbol(StackProbeSymbol)
.addReg(StackPtr, RegState::Define | RegState::Implicit)
.addReg(X86::EFLAGS, RegState::Define | RegState::Implicit)
.setMIFlag(MachineInstr::FrameSetup);
}
if (isEAXAlive) {
- // Restore EAX
- MachineInstr *MI = addRegOffset(BuildMI(MF, DL, TII.get(X86::MOV32rm),
- X86::EAX),
- StackPtr, false, NumBytes - 4);
- MI->setFlag(MachineInstr::FrameSetup);
- MBB.insert(MBBI, MI);
+ // Restore EAX
+ MachineInstr *MI = addRegOffset(BuildMI(MF, DL, TII.get(X86::MOV32rm),
+ X86::EAX),
+ StackPtr, false, NumBytes - 4);
+ MI->setFlag(MachineInstr::FrameSetup);
+ MBB.insert(MBBI, MI);
}
} else if (NumBytes) {
emitSPUpdate(MBB, MBBI, StackPtr, -(int64_t)NumBytes, Is64Bit, Uses64BitFramePtr,
// will restore SP to (BP - SEHFrameOffset)
for (const CalleeSavedInfo &Info : MFI->getCalleeSavedInfo()) {
int offset = MFI->getObjectOffset(Info.getFrameIdx());
- SEHFrameOffset = std::max(SEHFrameOffset, abs(offset));
+ SEHFrameOffset = std::max(SEHFrameOffset, std::abs(offset));
}
SEHFrameOffset += SEHFrameOffset % 16; // ensure alignmant
unsigned StackAlign = getStackAlignment();
unsigned SlotSize = RegInfo->getSlotSize();
unsigned FramePtr = RegInfo->getFrameRegister(MF);
- unsigned MachineFramePtr {Is64BitILP32 ?
- getX86SubSuperRegister(FramePtr, MVT::i64, false) : FramePtr};
+ unsigned MachineFramePtr = Is64BitILP32 ?
+ getX86SubSuperRegister(FramePtr, MVT::i64, false) : FramePtr;
unsigned StackPtr = RegInfo->getStackRegister();
bool IsWinEH =
const TargetRegisterClass *RC = RegInfo->getMinimalPhysRegClass(Reg);
// ensure alignment
- SpillSlotOffset -= abs(SpillSlotOffset) % RC->getAlignment();
+ SpillSlotOffset -= std::abs(SpillSlotOffset) % RC->getAlignment();
// spill into slot
SpillSlotOffset -= RC->getSize();
int SlotIndex =
/// and the properties of the function either one or two registers will be
/// needed. Set primary to true for the first register, false for the second.
static unsigned
-GetScratchRegister(bool Is64Bit, const MachineFunction &MF, bool Primary) {
+GetScratchRegister(bool Is64Bit, bool IsLP64, const MachineFunction &MF, bool Primary) {
CallingConv::ID CallingConvention = MF.getFunction()->getCallingConv();
// Erlang stuff.
return Primary ? X86::EBX : X86::EDI;
}
- if (Is64Bit)
- return Primary ? X86::R11 : X86::R12;
+ if (Is64Bit) {
+ if (IsLP64)
+ return Primary ? X86::R11 : X86::R12;
+ else
+ return Primary ? X86::R11D : X86::R12D;
+ }
bool IsNested = HasNestArgument(&MF);
uint64_t StackSize;
const X86Subtarget &STI = MF.getTarget().getSubtarget<X86Subtarget>();
bool Is64Bit = STI.is64Bit();
+ const bool IsLP64 = STI.isTarget64BitLP64();
unsigned TlsReg, TlsOffset;
DebugLoc DL;
- unsigned ScratchReg = GetScratchRegister(Is64Bit, MF, true);
+ unsigned ScratchReg = GetScratchRegister(Is64Bit, IsLP64, MF, true);
assert(!MF.getRegInfo().isLiveIn(ScratchReg) &&
"Scratch register is live-in");
}
if (IsNested)
- allocMBB->addLiveIn(X86::R10);
+ allocMBB->addLiveIn(IsLP64 ? X86::R10 : X86::R10D);
MF.push_front(allocMBB);
MF.push_front(checkMBB);
if (Is64Bit) {
if (STI.isTargetLinux()) {
TlsReg = X86::FS;
- TlsOffset = 0x70;
+ TlsOffset = IsLP64 ? 0x70 : 0x40;
} else if (STI.isTargetDarwin()) {
TlsReg = X86::GS;
TlsOffset = 0x60 + 90*8; // See pthread_machdep.h. Steal TLS slot 90.
}
if (CompareStackPointer)
- ScratchReg = X86::RSP;
+ ScratchReg = IsLP64 ? X86::RSP : X86::ESP;
else
- BuildMI(checkMBB, DL, TII.get(X86::LEA64r), ScratchReg).addReg(X86::RSP)
+ BuildMI(checkMBB, DL, TII.get(IsLP64 ? X86::LEA64r : X86::LEA64_32r), ScratchReg).addReg(X86::RSP)
.addImm(1).addReg(0).addImm(-StackSize).addReg(0);
- BuildMI(checkMBB, DL, TII.get(X86::CMP64rm)).addReg(ScratchReg)
+ BuildMI(checkMBB, DL, TII.get(IsLP64 ? X86::CMP64rm : X86::CMP32rm)).addReg(ScratchReg)
.addReg(0).addImm(1).addReg(0).addImm(TlsOffset).addReg(TlsReg);
} else {
if (STI.isTargetLinux()) {
bool SaveScratch2;
if (CompareStackPointer) {
// The primary scratch register is available for holding the TLS offset.
- ScratchReg2 = GetScratchRegister(Is64Bit, MF, true);
+ ScratchReg2 = GetScratchRegister(Is64Bit, IsLP64, MF, true);
SaveScratch2 = false;
} else {
// Need to use a second register to hold the TLS offset
- ScratchReg2 = GetScratchRegister(Is64Bit, MF, false);
+ ScratchReg2 = GetScratchRegister(Is64Bit, IsLP64, MF, false);
// Unfortunately, with fastcc the second scratch register may hold an
// argument.
// Functions with nested arguments use R10, so it needs to be saved across
// the call to _morestack
+ const unsigned RegAX = IsLP64 ? X86::RAX : X86::EAX;
+ const unsigned Reg10 = IsLP64 ? X86::R10 : X86::R10D;
+ const unsigned Reg11 = IsLP64 ? X86::R11 : X86::R11D;
+ const unsigned MOVrr = IsLP64 ? X86::MOV64rr : X86::MOV32rr;
+ const unsigned MOVri = IsLP64 ? X86::MOV64ri : X86::MOV32ri;
+
if (IsNested)
- BuildMI(allocMBB, DL, TII.get(X86::MOV64rr), X86::RAX).addReg(X86::R10);
+ BuildMI(allocMBB, DL, TII.get(MOVrr), RegAX).addReg(Reg10);
- BuildMI(allocMBB, DL, TII.get(X86::MOV64ri), X86::R10)
+ BuildMI(allocMBB, DL, TII.get(MOVri), Reg10)
.addImm(StackSize);
- BuildMI(allocMBB, DL, TII.get(X86::MOV64ri), X86::R11)
+ BuildMI(allocMBB, DL, TII.get(MOVri), Reg11)
.addImm(X86FI->getArgumentStackSize());
- MF.getRegInfo().setPhysRegUsed(X86::R10);
- MF.getRegInfo().setPhysRegUsed(X86::R11);
+ MF.getRegInfo().setPhysRegUsed(Reg10);
+ MF.getRegInfo().setPhysRegUsed(Reg11);
} else {
BuildMI(allocMBB, DL, TII.get(X86::PUSHi32))
.addImm(X86FI->getArgumentStackSize());
->getSlotSize();
const X86Subtarget &STI = MF.getTarget().getSubtarget<X86Subtarget>();
const bool Is64Bit = STI.is64Bit();
+ const bool IsLP64 = STI.isTarget64BitLP64();
DebugLoc DL;
// HiPE-specific values
const unsigned HipeLeafWords = 24;
SPLimitOffset = 0x4c;
}
- ScratchReg = GetScratchRegister(Is64Bit, MF, true);
+ ScratchReg = GetScratchRegister(Is64Bit, IsLP64, MF, true);
assert(!MF.getRegInfo().isLiveIn(ScratchReg) &&
"HiPE prologue scratch register is live-in");
projects / oota-llvm.git / blobdiff