MachineFunction::MachineFunction(const Function *F, const TargetMachine &TM,
unsigned FunctionNum, MachineModuleInfo &mmi)
- : Fn(F), Target(TM), STI(TM.getSubtargetImpl()), Ctx(mmi.getContext()),
+ : Fn(F), Target(TM), STI(TM.getSubtargetImpl(*F)), Ctx(mmi.getContext()),
MMI(mmi) {
if (STI->getRegisterInfo())
RegInfo = new (Allocator) MachineRegisterInfo(this);
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 = 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,
STI->getTargetLowering()->getPrefFunctionAlignment());
DOTGraphTraits (bool isSimple=false) : DefaultDOTGraphTraits(isSimple) {}
static std::string getGraphName(const MachineFunction *F) {
- return "CFG for '" + F->getName().str() + "' function";
+ return ("CFG for '" + F->getName() + "' function").str();
}
std::string getNodeLabel(const MachineBasicBlock *Node,
/// normal 'L' label is returned.
MCSymbol *MachineFunction::getJTISymbol(unsigned JTI, MCContext &Ctx,
bool isLinkerPrivate) const {
- const DataLayout *DL = getSubtarget().getDataLayout();
+ const DataLayout *DL = getTarget().getDataLayout();
assert(JumpTableInfo && "No jump tables");
assert(JTI < JumpTableInfo->getJumpTables().size() && "Invalid JTI!");
SmallString<60> Name;
raw_svector_ostream(Name)
<< Prefix << "JTI" << getFunctionNumber() << '_' << JTI;
- return Ctx.GetOrCreateSymbol(Name.str());
+ return Ctx.getOrCreateSymbol(Name);
}
/// getPICBaseSymbol - Return a function-local symbol to represent the PIC
/// base.
MCSymbol *MachineFunction::getPICBaseSymbol() const {
- const DataLayout *DL = getSubtarget().getDataLayout();
- return Ctx.GetOrCreateSymbol(Twine(DL->getPrivateGlobalPrefix())+
+ const DataLayout *DL = getTarget().getDataLayout();
+ return Ctx.getOrCreateSymbol(Twine(DL->getPrivateGlobalPrefix())+
Twine(getFunctionNumber())+"$pb");
}
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.getSubtargetImpl()->getRegisterInfo();
+ const TargetRegisterInfo *TRI = MF->getSubtarget().getRegisterInfo();
BitVector BV(TRI->getNumRegs());
// Before CSI is calculated, no registers are considered pristine. They can be
for (const MCPhysReg *CSR = TRI->getCalleeSavedRegs(MF); CSR && *CSR; ++CSR)
BV.set(*CSR);
- // The entry MBB always has all CSRs pristine.
- if (MBB == &MF->front())
+ // Each MBB before the save point has all CSRs pristine.
+ if (isBeforeSavePoint(*MF, *MBB))
return BV;
// On other MBBs the saved CSRs are not pristine.
return BV;
}
+// Note: We could use some sort of caching mecanism, but we lack the ability
+// to know when the cache is invalid, i.e., the CFG changed.
+// Assuming we have that, we can simply compute all the set of MBBs
+// that are before the save point.
+bool MachineFrameInfo::isBeforeSavePoint(const MachineFunction &MF,
+ const MachineBasicBlock &MBB) const {
+ // Early exit if shrink-wrapping did not kick.
+ if (!Save)
+ return &MBB == &MF.front();
+
+ // Starting from MBB, check if there is a path leading to Save that do
+ // not cross Restore.
+ SmallPtrSet<const MachineBasicBlock *, 8> Visited;
+ SmallVector<const MachineBasicBlock *, 8> WorkList;
+ WorkList.push_back(&MBB);
+ Visited.insert(&MBB);
+ do {
+ const MachineBasicBlock *CurBB = WorkList.pop_back_val();
+ // By construction, the region that is after the save point is
+ // dominated by the Save and post-dominated by the Restore.
+ // If we do not reach Restore and still reach Save, this
+ // means MBB is before Save.
+ if (CurBB == Save)
+ return true;
+ if (CurBB == Restore)
+ continue;
+ // Enqueue all the successors not already visited.
+ for (MachineBasicBlock *SuccBB : CurBB->successors())
+ if (Visited.insert(SuccBB).second)
+ WorkList.push_back(SuccBB);
+ } while (!WorkList.empty());
+ return false;
+}
+
unsigned MachineFrameInfo::estimateStackSize(const MachineFunction &MF) const {
const TargetFrameLowering *TFI = MF.getSubtarget().getFrameLowering();
const TargetRegisterInfo *RegInfo = MF.getSubtarget().getRegisterInfo();
void MachineConstantPoolValue::anchor() { }
const DataLayout *MachineConstantPool::getDataLayout() const {
- return TM.getSubtargetImpl()->getDataLayout();
+ return TM.getDataLayout();
}
Type *MachineConstantPoolEntry::getType() const {
switch (getRelocationInfo()) {
default:
llvm_unreachable("Unknown section kind");
- case 2:
+ case Constant::GlobalRelocations:
Kind = SectionKind::getReadOnlyWithRel();
break;
- case 1:
+ case Constant::LocalRelocation:
Kind = SectionKind::getReadOnlyWithRelLocal();
break;
- case 0:
+ case Constant::NoRelocation:
switch (DL->getTypeAllocSize(getType())) {
case 4:
Kind = SectionKind::getMergeableConst4();
Kind = SectionKind::getMergeableConst16();
break;
default:
- Kind = SectionKind::getMergeableConst();
+ Kind = SectionKind::getReadOnly();
break;
}
}
// DataLayout.
if (isa<PointerType>(A->getType()))
A = ConstantFoldInstOperands(Instruction::PtrToInt, IntTy,
- const_cast<Constant*>(A), TD);
+ const_cast<Constant *>(A), *TD);
else if (A->getType() != IntTy)
A = ConstantFoldInstOperands(Instruction::BitCast, IntTy,
- const_cast<Constant*>(A), TD);
+ const_cast<Constant *>(A), *TD);
if (isa<PointerType>(B->getType()))
B = ConstantFoldInstOperands(Instruction::PtrToInt, IntTy,
- const_cast<Constant*>(B), TD);
+ const_cast<Constant *>(B), *TD);
else if (B->getType() != IntTy)
B = ConstantFoldInstOperands(Instruction::BitCast, IntTy,
- const_cast<Constant*>(B), TD);
+ const_cast<Constant *>(B), *TD);
return A == B;
}
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