#define LLVM_CODEGEN_MACHINEFRAMEINFO_H
#include "llvm/ADT/SmallVector.h"
-//#include "llvm/ADT/IndexedMap.h"
#include "llvm/Support/DataTypes.h"
#include <cassert>
#include <vector>
namespace llvm {
class raw_ostream;
-class TargetData;
+class DataLayout;
class TargetRegisterClass;
class Type;
class MachineFunction;
class MachineBasicBlock;
-class TargetFrameInfo;
+class TargetFrameLowering;
class BitVector;
+class Value;
+class AllocaInst;
/// The CalleeSavedInfo class tracks the information need to locate where a
/// callee saved register is in the current frame.
// protector.
bool MayNeedSP;
+ /// Alloca - If this stack object is originated from an Alloca instruction
+ /// this value saves the original IR allocation. Can be NULL.
+ const AllocaInst *Alloca;
+
// 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)
+ bool isSS, bool NSP, const AllocaInst *Val)
: SPOffset(SP), Size(Sz), Alignment(Al), isImmutable(IM),
- isSpillSlot(isSS), MayNeedSP(NSP), PreAllocated(false) {}
+ isSpillSlot(isSS), MayNeedSP(NSP), Alloca(Val), PreAllocated(false) {}
};
/// Objects - The list of stack objects allocated...
/// StackProtectorIdx - The frame index for the stack protector.
int StackProtectorIdx;
+ /// FunctionContextIdx - The frame index for the function context. Used for
+ /// SjLj exceptions.
+ int FunctionContextIdx;
+
/// MaxCallFrameSize - This contains the size of the largest call frame if the
/// target uses frame setup/destroy pseudo instructions (as defined in the
/// TargetFrameInfo class). This information is important for frame pointer
/// CSIValid - Has CSInfo been set yet?
bool CSIValid;
- /// SpillObjects - A vector indicating which frame indices refer to
- /// spill slots.
- SmallVector<bool, 8> SpillObjects;
-
- /// TargetFrameInfo - Target information about frame layout.
+ /// TargetFrameLowering - Target information about frame layout.
///
- const TargetFrameInfo &TFI;
+ const TargetFrameLowering &TFI;
/// LocalFrameObjects - References to frame indices which are mapped
/// into the local frame allocation block. <FrameIdx, LocalOffset>
bool UseLocalStackAllocationBlock;
public:
- explicit MachineFrameInfo(const TargetFrameInfo &tfi) : TFI(tfi) {
+ explicit MachineFrameInfo(const TargetFrameLowering &tfi) : TFI(tfi) {
StackSize = NumFixedObjects = OffsetAdjustment = MaxAlignment = 0;
HasVarSizedObjects = false;
FrameAddressTaken = false;
AdjustsStack = false;
HasCalls = false;
StackProtectorIdx = -1;
+ FunctionContextIdx = -1;
MaxCallFrameSize = 0;
CSIValid = false;
LocalFrameSize = 0;
int getStackProtectorIndex() const { return StackProtectorIdx; }
void setStackProtectorIndex(int I) { StackProtectorIdx = I; }
+ /// getFunctionContextIndex/setFunctionContextIndex - Return the index for the
+ /// function context object. This object is used for SjLj exceptions.
+ int getFunctionContextIndex() const { return FunctionContextIdx; }
+ void setFunctionContextIndex(int I) { FunctionContextIdx = I; }
+
/// isFrameAddressTaken - This method may be called any time after instruction
/// selection is complete to determine if there is a call to
/// \@llvm.frameaddress in this function.
assert(unsigned(ObjectIdx+NumFixedObjects) < Objects.size() &&
"Invalid Object Idx!");
Objects[ObjectIdx+NumFixedObjects].Alignment = Align;
- MaxAlignment = std::max(MaxAlignment, Align);
+ ensureMaxAlignment(Align);
+ }
+
+ /// getObjectAllocation - Return the underlying Alloca of the specified
+ /// stack object if it exists. Returns 0 if none exists.
+ const AllocaInst* getObjectAllocation(int ObjectIdx) const {
+ assert(unsigned(ObjectIdx+NumFixedObjects) < Objects.size() &&
+ "Invalid Object Idx!");
+ return Objects[ObjectIdx+NumFixedObjects].Alloca;
}
/// NeedsStackProtector - Returns true if the object may need stack
///
unsigned getMaxAlignment() const { return MaxAlignment; }
- /// setMaxAlignment - Set the preferred alignment.
- ///
- void setMaxAlignment(unsigned Align) { MaxAlignment = Align; }
+ /// ensureMaxAlignment - Make sure the function is at least Align bytes
+ /// aligned.
+ void ensureMaxAlignment(unsigned Align) {
+ if (MaxAlignment < Align) MaxAlignment = Align;
+ }
/// AdjustsStack - Return true if this function adjusts the stack -- e.g.,
/// when calling another function. This is only valid during and after
bool isSpillSlotObjectIndex(int ObjectIdx) const {
assert(unsigned(ObjectIdx+NumFixedObjects) < Objects.size() &&
"Invalid Object Idx!");
- return Objects[ObjectIdx+NumFixedObjects].isSpillSlot;;
+ return Objects[ObjectIdx+NumFixedObjects].isSpillSlot;
}
/// isDeadObjectIndex - Returns true if the specified index corresponds to
/// a nonnegative identifier to represent it.
///
int CreateStackObject(uint64_t Size, unsigned Alignment, bool isSS,
- bool MayNeedSP = false) {
+ bool MayNeedSP = false, const AllocaInst *Alloca = 0) {
assert(Size != 0 && "Cannot allocate zero size stack objects!");
- Objects.push_back(StackObject(Size, Alignment, 0, false, isSS, MayNeedSP));
+ Objects.push_back(StackObject(Size, Alignment, 0, false, isSS, MayNeedSP,
+ Alloca));
int Index = (int)Objects.size() - NumFixedObjects - 1;
assert(Index >= 0 && "Bad frame index!");
- MaxAlignment = std::max(MaxAlignment, Alignment);
+ ensureMaxAlignment(Alignment);
return Index;
}
int CreateSpillStackObject(uint64_t Size, unsigned Alignment) {
CreateStackObject(Size, Alignment, true, false);
int Index = (int)Objects.size() - NumFixedObjects - 1;
- MaxAlignment = std::max(MaxAlignment, Alignment);
+ ensureMaxAlignment(Alignment);
return Index;
}
///
int CreateVariableSizedObject(unsigned Alignment) {
HasVarSizedObjects = true;
- Objects.push_back(StackObject(0, Alignment, 0, false, false, true));
- MaxAlignment = std::max(MaxAlignment, Alignment);
+ Objects.push_back(StackObject(0, Alignment, 0, false, false, true, 0));
+ ensureMaxAlignment(Alignment);
return (int)Objects.size()-NumFixedObjects-1;
}
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