#define LLVM_CODEGEN_MACHINEFRAMEINFO_H
#include "llvm/ADT/SmallVector.h"
+//#include "llvm/ADT/IndexedMap.h"
#include "llvm/System/DataTypes.h"
#include <cassert>
#include <vector>
class BitVector;
/// The CalleeSavedInfo class tracks the information need to locate where a
-/// callee saved register in the current frame.
+/// callee saved register is in the current frame.
class CalleeSavedInfo {
unsigned Reg;
int FrameIdx;
-
+
public:
explicit CalleeSavedInfo(unsigned R, int FI = 0)
: Reg(R), FrameIdx(FI) {}
-
+
// Accessors.
unsigned getReg() const { return Reg; }
int getFrameIdx() const { return FrameIdx; }
// SPOffset - The offset of this object from the stack pointer on entry to
// the function. This field has no meaning for a variable sized element.
int64_t SPOffset;
-
+
// The size of this object on the stack. 0 means a variable sized object,
// ~0ULL means a dead object.
uint64_t Size;
// protector.
bool MayNeedSP;
+ // PreAllocated - If true, the object was mapped into the local frame
+ // block and doesn't need additional handling for allocation beyond that.
+ bool PreAllocated;
+
StackObject(uint64_t Sz, unsigned Al, int64_t SP, bool IM,
bool isSS, bool NSP)
: SPOffset(SP), Size(Sz), Alignment(Al), isImmutable(IM),
- isSpillSlot(isSS), MayNeedSP(NSP) {}
+ isSpillSlot(isSS), MayNeedSP(NSP), PreAllocated(false) {}
};
/// Objects - The list of stack objects allocated...
/// to be allocated on entry to the function.
///
uint64_t StackSize;
-
+
/// OffsetAdjustment - The amount that a frame offset needs to be adjusted to
/// have the actual offset from the stack/frame pointer. The exact usage of
/// this is target-dependent, but it is typically used to adjust between
/// TargetRegisterInfo::getFrameIndexOffset); when generating code, the
/// corresponding adjustments are performed directly.
int OffsetAdjustment;
-
- /// MaxAlignment - The prolog/epilog code inserter may process objects
+
+ /// MaxAlignment - The prolog/epilog code inserter may process objects
/// that require greater alignment than the default alignment the target
- /// provides. To handle this, MaxAlignment is set to the maximum alignment
+ /// provides. To handle this, MaxAlignment is set to the maximum alignment
/// needed by the objects on the current frame. If this is greater than the
/// native alignment maintained by the compiler, dynamic alignment code will
/// be needed.
/// insertion.
///
unsigned MaxCallFrameSize;
-
+
/// CSInfo - The prolog/epilog code inserter fills in this vector with each
/// callee saved register saved in the frame. Beyond its use by the prolog/
/// epilog code inserter, this data used for debug info and exception
///
const TargetFrameInfo &TFI;
+ /// LocalFrameObjects - References to frame indices which are mapped
+ /// into the local frame allocation block. <FrameIdx, LocalOffset>
+ SmallVector<std::pair<int, int64_t>, 32> LocalFrameObjects;
+
+ /// LocalFrameSize - Size of the pre-allocated local frame block.
+ int64_t LocalFrameSize;
+
+ /// Required alignment of the local object blob, which is the strictest
+ /// alignment of any object in it.
+ unsigned LocalFrameMaxAlign;
+
+ /// Whether the local object blob needs to be allocated together. If not,
+ /// PEI should ignore the isPreAllocated flags on the stack objects and
+ /// just allocate them normally.
+ bool UseLocalStackAllocationBlock;
+
public:
- explicit MachineFrameInfo(const TargetFrameInfo &tfi) : TFI(tfi) {
+ explicit MachineFrameInfo(const TargetFrameInfo &tfi) : TFI(tfi) {
StackSize = NumFixedObjects = OffsetAdjustment = MaxAlignment = 0;
HasVarSizedObjects = false;
FrameAddressTaken = false;
StackProtectorIdx = -1;
MaxCallFrameSize = 0;
CSIValid = false;
+ LocalFrameSize = 0;
+ LocalFrameMaxAlign = 0;
+ UseLocalStackAllocationBlock = false;
}
/// hasStackObjects - Return true if there are any stack objects in this
bool isFrameAddressTaken() const { return FrameAddressTaken; }
void setFrameAddressIsTaken(bool T) { FrameAddressTaken = T; }
- /// isReturnAddressTaken - This method may be called any time after instruction
- /// selection is complete to determine if there is a call to
+ /// isReturnAddressTaken - This method may be called any time after
+ /// instruction selection is complete to determine if there is a call to
/// \@llvm.returnaddress in this function.
bool isReturnAddressTaken() const { return ReturnAddressTaken; }
void setReturnAddressIsTaken(bool s) { ReturnAddressTaken = s; }
///
int getObjectIndexEnd() const { return (int)Objects.size()-NumFixedObjects; }
- /// getNumFixedObjects() - Return the number of fixed objects.
+ /// getNumFixedObjects - Return the number of fixed objects.
unsigned getNumFixedObjects() const { return NumFixedObjects; }
- /// getNumObjects() - Return the number of objects.
+ /// getNumObjects - Return the number of objects.
///
unsigned getNumObjects() const { return Objects.size(); }
+ /// mapLocalFrameObject - Map a frame index into the local object block
+ void mapLocalFrameObject(int ObjectIndex, int64_t Offset) {
+ LocalFrameObjects.push_back(std::pair<int, int64_t>(ObjectIndex, Offset));
+ Objects[ObjectIndex + NumFixedObjects].PreAllocated = true;
+ }
+
+ /// getLocalFrameObjectMap - Get the local offset mapping for a for an object
+ std::pair<int, int64_t> getLocalFrameObjectMap(int i) {
+ assert (i >= 0 && (unsigned)i < LocalFrameObjects.size() &&
+ "Invalid local object reference!");
+ return LocalFrameObjects[i];
+ }
+
+ /// getLocalFrameObjectCount - Return the number of objects allocated into
+ /// the local object block.
+ int64_t getLocalFrameObjectCount() { return LocalFrameObjects.size(); }
+
+ /// setLocalFrameSize - Set the size of the local object blob.
+ void setLocalFrameSize(int64_t sz) { LocalFrameSize = sz; }
+
+ /// getLocalFrameSize - Get the size of the local object blob.
+ int64_t getLocalFrameSize() const { return LocalFrameSize; }
+
+ /// setLocalFrameMaxAlign - Required alignment of the local object blob,
+ /// which is the strictest alignment of any object in it.
+ void setLocalFrameMaxAlign(unsigned Align) { LocalFrameMaxAlign = Align; }
+
+ /// getLocalFrameMaxAlign - Return the required alignment of the local
+ /// object blob.
+ unsigned getLocalFrameMaxAlign() const { return LocalFrameMaxAlign; }
+
+ /// getUseLocalStackAllocationBlock - Get whether the local allocation blob
+ /// should be allocated together or let PEI allocate the locals in it
+ /// directly.
+ bool getUseLocalStackAllocationBlock() {return UseLocalStackAllocationBlock;}
+
+ /// setUseLocalStackAllocationBlock - Set whether the local allocation blob
+ /// should be allocated together or let PEI allocate the locals in it
+ /// directly.
+ void setUseLocalStackAllocationBlock(bool v) {
+ UseLocalStackAllocationBlock = v;
+ }
+
+ /// isObjectPreAllocated - Return true if the object was pre-allocated into
+ /// the local block.
+ bool isObjectPreAllocated(int ObjectIdx) const {
+ assert(unsigned(ObjectIdx+NumFixedObjects) < Objects.size() &&
+ "Invalid Object Idx!");
+ return Objects[ObjectIdx+NumFixedObjects].PreAllocated;
+ }
+
/// getObjectSize - Return the size of the specified object.
///
int64_t getObjectSize(int ObjectIdx) const {
/// setStackSize - Set the size of the stack...
///
void setStackSize(uint64_t Size) { StackSize = Size; }
-
+
/// getOffsetAdjustment - Return the correction for frame offsets.
///
int getOffsetAdjustment() const { return OffsetAdjustment; }
-
+
/// setOffsetAdjustment - Set the correction for frame offsets.
///
void setOffsetAdjustment(int Adj) { OffsetAdjustment = Adj; }
- /// getMaxAlignment - Return the alignment in bytes that this function must be
- /// aligned to, which is greater than the default stack alignment provided by
+ /// getMaxAlignment - Return the alignment in bytes that this function must be
+ /// aligned to, which is greater than the default stack alignment provided by
/// the target.
///
unsigned getMaxAlignment() const { return MaxAlignment; }
-
+
/// setMaxAlignment - Set the preferred alignment.
///
void setMaxAlignment(unsigned Align) { MaxAlignment = Align; }
/// index with a negative value.
///
int CreateFixedObject(uint64_t Size, int64_t SPOffset, bool Immutable);
-
-
+
+
/// isFixedObjectIndex - Returns true if the specified index corresponds to a
/// fixed stack object.
bool isFixedObjectIndex(int ObjectIdx) const {
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