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Directly access objects which may change during compilation.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@184121 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Bill Wendling
2013-06-17 20:41:25 +00:00
parent 99ccd5d5ef
commit d10fa8b1ca
6 changed files with 99 additions and 52 deletions
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53
lib/CodeGen/MachineFunction.cpp
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@ -55,23 +55,27 @@ MachineFunction::MachineFunction(const Function *F, const TargetMachine &TM,
GCModuleInfo* gmi)
: Fn(F), Target(TM), Ctx(mmi.getContext()), MMI(mmi), GMI(gmi) {
if (TM.getRegisterInfo())
RegInfo = new (Allocator) MachineRegisterInfo(*TM.getRegisterInfo());
RegInfo = new (Allocator) MachineRegisterInfo(TM);
else
RegInfo = 0;
MFInfo = 0;
FrameInfo = new (Allocator) MachineFrameInfo(*TM.getFrameLowering(),
TM.Options.RealignStack);
FrameInfo = new (Allocator) MachineFrameInfo(TM, TM.Options.RealignStack);
if (Fn->getAttributes().hasAttribute(AttributeSet::FunctionIndex,
Attribute::StackAlignment))
FrameInfo->ensureMaxAlignment(Fn->getAttributes().
getStackAlignment(AttributeSet::FunctionIndex));
ConstantPool = new (Allocator) MachineConstantPool(TM.getDataLayout());
ConstantPool = new (Allocator) MachineConstantPool(TM);
Alignment = TM.getTargetLowering()->getMinFunctionAlignment();
// FIXME: Shouldn't use pref alignment if explicit alignment is set on Fn.
if (!Fn->getAttributes().hasAttribute(AttributeSet::FunctionIndex,
Attribute::OptimizeForSize))
Alignment = std::max(Alignment,
TM.getTargetLowering()->getPrefFunctionAlignment());
FunctionNumber = FunctionNum;
JumpTableInfo = 0;
}
@ -457,11 +461,15 @@ MCSymbol *MachineFunction::getPICBaseSymbol() const {
// 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 (!TFI.isStackRealignable() || !RealignOption)
assert(Align <= TFI.getStackAlignment() &&
if (!getFrameLowering()->isStackRealignable() || !RealignOption)
assert(Align <= getFrameLowering()->getStackAlignment() &&
"For targets without stack realignment, Align is out of limit!");
if (MaxAlignment < Align) MaxAlignment = Align;
}
@ -483,8 +491,10 @@ static inline unsigned clampStackAlignment(bool ShouldClamp, unsigned Align,
int MachineFrameInfo::CreateStackObject(uint64_t Size, unsigned Alignment,
bool isSS, bool MayNeedSP, const AllocaInst *Alloca) {
assert(Size != 0 && "Cannot allocate zero size stack objects!");
Alignment = clampStackAlignment(!TFI.isStackRealignable() || !RealignOption,
Alignment, TFI.getStackAlignment());
Alignment =
clampStackAlignment(!getFrameLowering()->isStackRealignable() ||
!RealignOption,
Alignment, getFrameLowering()->getStackAlignment());
Objects.push_back(StackObject(Size, Alignment, 0, false, isSS, MayNeedSP,
Alloca));
int Index = (int)Objects.size() - NumFixedObjects - 1;
@ -499,8 +509,10 @@ int MachineFrameInfo::CreateStackObject(uint64_t Size, unsigned Alignment,
///
int MachineFrameInfo::CreateSpillStackObject(uint64_t Size,
unsigned Alignment) {
Alignment = clampStackAlignment(!TFI.isStackRealignable() || !RealignOption,
Alignment, TFI.getStackAlignment());
Alignment =
clampStackAlignment(!getFrameLowering()->isStackRealignable() ||
!RealignOption,
Alignment, getFrameLowering()->getStackAlignment());
CreateStackObject(Size, Alignment, true, false);
int Index = (int)Objects.size() - NumFixedObjects - 1;
ensureMaxAlignment(Alignment);
@ -514,8 +526,10 @@ int MachineFrameInfo::CreateSpillStackObject(uint64_t Size,
///
int MachineFrameInfo::CreateVariableSizedObject(unsigned Alignment) {
HasVarSizedObjects = true;
Alignment = clampStackAlignment(!TFI.isStackRealignable() || !RealignOption,
Alignment, TFI.getStackAlignment());
Alignment =
clampStackAlignment(!getFrameLowering()->isStackRealignable() ||
!RealignOption,
Alignment, getFrameLowering()->getStackAlignment());
Objects.push_back(StackObject(0, Alignment, 0, false, false, true, 0));
ensureMaxAlignment(Alignment);
return (int)Objects.size()-NumFixedObjects-1;
@ -533,10 +547,12 @@ int MachineFrameInfo::CreateFixedObject(uint64_t Size, int64_t SPOffset,
// 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 = TFI.getStackAlignment();
unsigned StackAlign = getFrameLowering()->getStackAlignment();
unsigned Align = MinAlign(SPOffset, StackAlign);
Align = clampStackAlignment(!TFI.isStackRealignable() || !RealignOption,
Align, TFI.getStackAlignment());
Align =
clampStackAlignment(!getFrameLowering()->isStackRealignable() ||
!RealignOption,
Align, getFrameLowering()->getStackAlignment());
Objects.insert(Objects.begin(), StackObject(Size, Align, SPOffset, Immutable,
/*isSS*/ false,
/*NeedSP*/ false,
@ -770,6 +786,10 @@ void MachineJumpTableInfo::dump() const { print(dbgs()); }
void MachineConstantPoolValue::anchor() { }
const DataLayout *MachineConstantPool::getDataLayout() const {
return TM.getDataLayout();
}
Type *MachineConstantPoolEntry::getType() const {
if (isMachineConstantPoolEntry())
return Val.MachineCPVal->getType();
@ -851,7 +871,8 @@ unsigned MachineConstantPool::getConstantPoolIndex(const Constant *C,
// FIXME, this could be made much more efficient for large constant pools.
for (unsigned i = 0, e = Constants.size(); i != e; ++i)
if (!Constants[i].isMachineConstantPoolEntry() &&
CanShareConstantPoolEntry(Constants[i].Val.ConstVal, C, TD)) {
CanShareConstantPoolEntry(Constants[i].Val.ConstVal, C,
getDataLayout())) {
if ((unsigned)Constants[i].getAlignment() < Alignment)
Constants[i].Alignment = Alignment;
return i;