#include "llvm/Target/TargetFrameLowering.h"
#include "llvm/Target/TargetLowering.h"
#include "llvm/Target/TargetMachine.h"
+#include "llvm/Target/TargetSubtargetInfo.h"
using namespace llvm;
+#define DEBUG_TYPE "codegen"
+
//===----------------------------------------------------------------------===//
// MachineFunction implementation
//===----------------------------------------------------------------------===//
}
MachineFunction::MachineFunction(const Function *F, const TargetMachine &TM,
- unsigned FunctionNum, MachineModuleInfo &mmi,
- GCModuleInfo* gmi)
- : Fn(F), Target(TM), Ctx(mmi.getContext()), MMI(mmi), GMI(gmi) {
- if (TM.getRegisterInfo())
- RegInfo = new (Allocator) MachineRegisterInfo(TM);
+ unsigned FunctionNum, MachineModuleInfo &mmi)
+ : Fn(F), Target(TM), STI(TM.getSubtargetImpl()), Ctx(mmi.getContext()),
+ MMI(mmi) {
+ if (STI->getRegisterInfo())
+ RegInfo = new (Allocator) MachineRegisterInfo(this);
else
- RegInfo = 0;
+ RegInfo = nullptr;
- MFInfo = 0;
- FrameInfo =
- new (Allocator) MachineFrameInfo(TM,!F->hasFnAttribute("no-realign-stack"));
+ MFInfo = nullptr;
+ FrameInfo = new (Allocator)
+ MachineFrameInfo(STI->getFrameLowering()->getStackAlignment(),
+ STI->getFrameLowering()->isStackRealignable(),
+ !F->hasFnAttribute("no-realign-stack"));
- if (Fn->getAttributes().hasAttribute(AttributeSet::FunctionIndex,
- Attribute::StackAlignment))
- FrameInfo->ensureMaxAlignment(Fn->getAttributes().
- getStackAlignment(AttributeSet::FunctionIndex));
+ if (Fn->hasFnAttribute(Attribute::StackAlignment))
+ FrameInfo->ensureMaxAlignment(Fn->getFnStackAlignment());
ConstantPool = new (Allocator) MachineConstantPool(TM);
- Alignment = TM.getTargetLowering()->getMinFunctionAlignment();
+ Alignment = STI->getTargetLowering()->getMinFunctionAlignment();
// FIXME: Shouldn't use pref alignment if explicit alignment is set on Fn.
- if (!Fn->getAttributes().hasAttribute(AttributeSet::FunctionIndex,
- Attribute::OptimizeForSize))
+ if (!Fn->hasFnAttribute(Attribute::OptimizeForSize))
Alignment = std::max(Alignment,
- TM.getTargetLowering()->getPrefFunctionAlignment());
+ STI->getTargetLowering()->getPrefFunctionAlignment());
FunctionNumber = FunctionNum;
- JumpTableInfo = 0;
+ JumpTableInfo = nullptr;
}
MachineFunction::~MachineFunction() {
return JumpTableInfo;
}
+/// Should we be emitting segmented stack stuff for the function
+bool MachineFunction::shouldSplitStack() {
+ return getFunction()->hasFnAttribute("split-stack");
+}
+
/// RenumberBlocks - This discards all of the MachineBasicBlock numbers and
/// recomputes them. This guarantees that the MBB numbers are sequential,
/// dense, and match the ordering of the blocks within the function. If a
void MachineFunction::RenumberBlocks(MachineBasicBlock *MBB) {
if (empty()) { MBBNumbering.clear(); return; }
MachineFunction::iterator MBBI, E = end();
- if (MBB == 0)
+ if (MBB == nullptr)
MBBI = begin();
else
MBBI = MBB;
if (MBBI->getNumber() != -1) {
assert(MBBNumbering[MBBI->getNumber()] == &*MBBI &&
"MBB number mismatch!");
- MBBNumbering[MBBI->getNumber()] = 0;
+ MBBNumbering[MBBI->getNumber()] = nullptr;
}
// If BlockNo is already taken, set that block's number to -1.
MachineMemOperand *
MachineFunction::getMachineMemOperand(MachinePointerInfo PtrInfo, unsigned f,
uint64_t s, unsigned base_alignment,
- const MDNode *TBAAInfo,
+ const AAMDNodes &AAInfo,
const MDNode *Ranges) {
return new (Allocator) MachineMemOperand(PtrInfo, f, s, base_alignment,
- TBAAInfo, Ranges);
+ AAInfo, Ranges);
}
MachineMemOperand *
MachineFunction::getMachineMemOperand(const MachineMemOperand *MMO,
int64_t Offset, uint64_t Size) {
+ if (MMO->getValue())
+ return new (Allocator)
+ MachineMemOperand(MachinePointerInfo(MMO->getValue(),
+ MMO->getOffset()+Offset),
+ MMO->getFlags(), Size,
+ MMO->getBaseAlignment());
return new (Allocator)
- MachineMemOperand(MachinePointerInfo(MMO->getValue(),
+ MachineMemOperand(MachinePointerInfo(MMO->getPseudoValue(),
MMO->getOffset()+Offset),
MMO->getFlags(), Size,
- MMO->getBaseAlignment(), 0);
+ MMO->getBaseAlignment());
}
MachineInstr::mmo_iterator
getMachineMemOperand((*I)->getPointerInfo(),
(*I)->getFlags() & ~MachineMemOperand::MOStore,
(*I)->getSize(), (*I)->getBaseAlignment(),
- (*I)->getTBAAInfo());
+ (*I)->getAAInfo());
Result[Index] = JustLoad;
}
++Index;
getMachineMemOperand((*I)->getPointerInfo(),
(*I)->getFlags() & ~MachineMemOperand::MOLoad,
(*I)->getSize(), (*I)->getBaseAlignment(),
- (*I)->getTBAAInfo());
+ (*I)->getAAInfo());
Result[Index] = JustStore;
}
++Index;
// Print Constant Pool
ConstantPool->print(OS);
- const TargetRegisterInfo *TRI = getTarget().getRegisterInfo();
+ const TargetRegisterInfo *TRI = getSubtarget().getRegisterInfo();
if (RegInfo && !RegInfo->livein_empty()) {
OS << "Function Live Ins: ";
OS << '\n';
}
- for (const_iterator BB = begin(), E = end(); BB != E; ++BB) {
+ for (const auto &BB : *this) {
OS << '\n';
- BB->print(OS, Indexes);
+ BB.print(OS, Indexes);
}
OS << "\n# End machine code for function " << getName() << ".\n\n";
/// getJTISymbol - Return the MCSymbol for the specified non-empty jump table.
/// If isLinkerPrivate is specified, an 'l' label is returned, otherwise a
/// normal 'L' label is returned.
-MCSymbol *MachineFunction::getJTISymbol(unsigned JTI, MCContext &Ctx,
+MCSymbol *MachineFunction::getJTISymbol(unsigned JTI, MCContext &Ctx,
bool isLinkerPrivate) const {
const DataLayout *DL = getTarget().getDataLayout();
assert(JumpTableInfo && "No jump tables");
// MachineFrameInfo implementation
//===----------------------------------------------------------------------===//
-const TargetFrameLowering *MachineFrameInfo::getFrameLowering() const {
- return TM.getFrameLowering();
-}
-
/// ensureMaxAlignment - Make sure the function is at least Align bytes
/// aligned.
void MachineFrameInfo::ensureMaxAlignment(unsigned Align) {
- if (!getFrameLowering()->isStackRealignable() || !RealignOption)
- assert(Align <= getFrameLowering()->getStackAlignment() &&
+ if (!StackRealignable || !RealignOption)
+ assert(Align <= StackAlignment &&
"For targets without stack realignment, Align is out of limit!");
if (MaxAlignment < Align) MaxAlignment = Align;
}
int MachineFrameInfo::CreateStackObject(uint64_t Size, unsigned Alignment,
bool isSS, const AllocaInst *Alloca) {
assert(Size != 0 && "Cannot allocate zero size stack objects!");
- Alignment =
- clampStackAlignment(!getFrameLowering()->isStackRealignable() ||
- !RealignOption,
- Alignment, getFrameLowering()->getStackAlignment());
- Objects.push_back(StackObject(Size, Alignment, 0, false, isSS, Alloca));
+ Alignment = clampStackAlignment(!StackRealignable || !RealignOption,
+ Alignment, StackAlignment);
+ Objects.push_back(StackObject(Size, Alignment, 0, false, isSS, Alloca,
+ !isSS));
int Index = (int)Objects.size() - NumFixedObjects - 1;
assert(Index >= 0 && "Bad frame index!");
ensureMaxAlignment(Alignment);
///
int MachineFrameInfo::CreateSpillStackObject(uint64_t Size,
unsigned Alignment) {
- Alignment =
- clampStackAlignment(!getFrameLowering()->isStackRealignable() ||
- !RealignOption,
- Alignment, getFrameLowering()->getStackAlignment());
+ Alignment = clampStackAlignment(!StackRealignable || !RealignOption,
+ Alignment, StackAlignment);
CreateStackObject(Size, Alignment, true);
int Index = (int)Objects.size() - NumFixedObjects - 1;
ensureMaxAlignment(Alignment);
int MachineFrameInfo::CreateVariableSizedObject(unsigned Alignment,
const AllocaInst *Alloca) {
HasVarSizedObjects = true;
- Alignment =
- clampStackAlignment(!getFrameLowering()->isStackRealignable() ||
- !RealignOption,
- Alignment, getFrameLowering()->getStackAlignment());
- Objects.push_back(StackObject(0, Alignment, 0, false, false, Alloca));
+ Alignment = clampStackAlignment(!StackRealignable || !RealignOption,
+ Alignment, StackAlignment);
+ Objects.push_back(StackObject(0, Alignment, 0, false, false, Alloca, true));
ensureMaxAlignment(Alignment);
return (int)Objects.size()-NumFixedObjects-1;
}
/// index with a negative value.
///
int MachineFrameInfo::CreateFixedObject(uint64_t Size, int64_t SPOffset,
- bool Immutable) {
+ bool Immutable, bool isAliased) {
assert(Size != 0 && "Cannot allocate zero size fixed stack objects!");
// The alignment of the frame index can be determined from its offset from
// the incoming frame position. If the frame object is at offset 32 and
// the stack is guaranteed to be 16-byte aligned, then we know that the
// object is 16-byte aligned.
- unsigned StackAlign = getFrameLowering()->getStackAlignment();
- unsigned Align = MinAlign(SPOffset, StackAlign);
- Align =
- clampStackAlignment(!getFrameLowering()->isStackRealignable() ||
- !RealignOption,
- Align, getFrameLowering()->getStackAlignment());
+ unsigned Align = MinAlign(SPOffset, StackAlignment);
+ Align = clampStackAlignment(!StackRealignable || !RealignOption, Align,
+ StackAlignment);
Objects.insert(Objects.begin(), StackObject(Size, Align, SPOffset, Immutable,
/*isSS*/ false,
- /*Alloca*/ 0));
+ /*Alloca*/ nullptr, isAliased));
+ return -++NumFixedObjects;
+}
+
+/// CreateFixedSpillStackObject - Create a spill slot at a fixed location
+/// on the stack. Returns an index with a negative value.
+int MachineFrameInfo::CreateFixedSpillStackObject(uint64_t Size,
+ int64_t SPOffset) {
+ unsigned Align = MinAlign(SPOffset, StackAlignment);
+ Align = clampStackAlignment(!StackRealignable || !RealignOption, Align,
+ StackAlignment);
+ Objects.insert(Objects.begin(), StackObject(Size, Align, SPOffset,
+ /*Immutable*/ true,
+ /*isSS*/ true,
+ /*Alloca*/ nullptr,
+ /*isAliased*/ false));
return -++NumFixedObjects;
}
+int MachineFrameInfo::CreateFrameAllocation(uint64_t Size) {
+ // Force the use of a frame pointer. The intention is that this intrinsic be
+ // used in conjunction with unwind mechanisms that leak the frame pointer.
+ setFrameAddressIsTaken(true);
+ Size = RoundUpToAlignment(Size, StackAlignment);
+ return CreateStackObject(Size, StackAlignment, false);
+}
BitVector
MachineFrameInfo::getPristineRegs(const MachineBasicBlock *MBB) const {
assert(MBB && "MBB must be valid");
const MachineFunction *MF = MBB->getParent();
assert(MF && "MBB must be part of a MachineFunction");
- const TargetMachine &TM = MF->getTarget();
- const TargetRegisterInfo *TRI = TM.getRegisterInfo();
+ const TargetRegisterInfo *TRI = MF->getSubtarget().getRegisterInfo();
BitVector BV(TRI->getNumRegs());
// Before CSI is calculated, no registers are considered pristine. They can be
if (!isCalleeSavedInfoValid())
return BV;
- for (const uint16_t *CSR = TRI->getCalleeSavedRegs(MF); CSR && *CSR; ++CSR)
+ for (const MCPhysReg *CSR = TRI->getCalleeSavedRegs(MF); CSR && *CSR; ++CSR)
BV.set(*CSR);
// The entry MBB always has all CSRs pristine.
}
unsigned MachineFrameInfo::estimateStackSize(const MachineFunction &MF) const {
- const TargetFrameLowering *TFI = MF.getTarget().getFrameLowering();
- const TargetRegisterInfo *RegInfo = MF.getTarget().getRegisterInfo();
+ const TargetFrameLowering *TFI = MF.getSubtarget().getFrameLowering();
+ const TargetRegisterInfo *RegInfo = MF.getSubtarget().getRegisterInfo();
unsigned MaxAlign = getMaxAlignment();
int Offset = 0;
void MachineFrameInfo::print(const MachineFunction &MF, raw_ostream &OS) const{
if (Objects.empty()) return;
- const TargetFrameLowering *FI = MF.getTarget().getFrameLowering();
+ const TargetFrameLowering *FI = MF.getSubtarget().getFrameLowering();
int ValOffset = (FI ? FI->getOffsetOfLocalArea() : 0);
OS << "Frame Objects:\n";
return Val.ConstVal->getRelocationInfo();
}
+SectionKind
+MachineConstantPoolEntry::getSectionKind(const DataLayout *DL) const {
+ SectionKind Kind;
+ switch (getRelocationInfo()) {
+ default:
+ llvm_unreachable("Unknown section kind");
+ case Constant::GlobalRelocations:
+ Kind = SectionKind::getReadOnlyWithRel();
+ break;
+ case Constant::LocalRelocation:
+ Kind = SectionKind::getReadOnlyWithRelLocal();
+ break;
+ case Constant::NoRelocation:
+ switch (DL->getTypeAllocSize(getType())) {
+ case 4:
+ Kind = SectionKind::getMergeableConst4();
+ break;
+ case 8:
+ Kind = SectionKind::getMergeableConst8();
+ break;
+ case 16:
+ Kind = SectionKind::getMergeableConst16();
+ break;
+ default:
+ Kind = SectionKind::getReadOnly();
+ break;
+ }
+ }
+ return Kind;
+}
+
MachineConstantPool::~MachineConstantPool() {
for (unsigned i = 0, e = Constants.size(); i != e; ++i)
if (Constants[i].isMachineConstantPoolEntry())
if (isa<StructType>(A->getType()) || isa<ArrayType>(A->getType()) ||
isa<StructType>(B->getType()) || isa<ArrayType>(B->getType()))
return false;
-
+
// For now, only support constants with the same size.
uint64_t StoreSize = TD->getTypeStoreSize(A->getType());
- if (StoreSize != TD->getTypeStoreSize(B->getType()) ||
- StoreSize > 128)
+ if (StoreSize != TD->getTypeStoreSize(B->getType()) || StoreSize > 128)
return false;
Type *IntTy = IntegerType::get(A->getContext(), StoreSize*8);
/// an existing one. User must specify the log2 of the minimum required
/// alignment for the object.
///
-unsigned MachineConstantPool::getConstantPoolIndex(const Constant *C,
+unsigned MachineConstantPool::getConstantPoolIndex(const Constant *C,
unsigned Alignment) {
assert(Alignment && "Alignment must be specified!");
if (Alignment > PoolAlignment) PoolAlignment = Alignment;