#include "llvm/CodeGen/MachineLoopInfo.h"
#include "llvm/CodeGen/MachineInstr.h"
#include "llvm/CodeGen/MachineFrameInfo.h"
-#include "llvm/CodeGen/MachineModuleInfo.h"
#include "llvm/CodeGen/MachineRegisterInfo.h"
#include "llvm/CodeGen/RegisterScavenging.h"
#include "llvm/Target/TargetMachine.h"
const TargetRegisterInfo *TRI = Fn.getTarget().getRegisterInfo();
RS = TRI->requiresRegisterScavenging(Fn) ? new RegScavenger() : NULL;
FrameIndexVirtualScavenging = TRI->requiresFrameIndexScavenging(Fn);
-
- // Get MachineModuleInfo so that we can track the construction of the
- // frame.
- if (MachineModuleInfo *MMI = getAnalysisIfAvailable<MachineModuleInfo>())
- Fn.getFrameInfo()->setMachineModuleInfo(MMI);
+ FrameConstantRegMap.clear();
// Calculate the MaxCallFrameSize and HasCalls variables for the function's
// frame information. Also eliminates call frame pseudo instructions.
/// pseudo instructions.
void PEI::calculateCallsInformation(MachineFunction &Fn) {
const TargetRegisterInfo *RegInfo = Fn.getTarget().getRegisterInfo();
- MachineFrameInfo *FFI = Fn.getFrameInfo();
+ MachineFrameInfo *MFI = Fn.getFrameInfo();
unsigned MaxCallFrameSize = 0;
- bool HasCalls = FFI->hasCalls();
+ bool HasCalls = MFI->hasCalls();
// Get the function call frame set-up and tear-down instruction opcode
int FrameSetupOpcode = RegInfo->getCallFrameSetupOpcode();
HasCalls = true;
}
- FFI->setHasCalls(HasCalls);
- FFI->setMaxCallFrameSize(MaxCallFrameSize);
+ MFI->setHasCalls(HasCalls);
+ MFI->setMaxCallFrameSize(MaxCallFrameSize);
for (std::vector<MachineBasicBlock::iterator>::iterator
i = FrameSDOps.begin(), e = FrameSDOps.end(); i != e; ++i) {
MachineBasicBlock::iterator I = *i;
// If call frames are not being included as part of the stack frame, and
- // there is no dynamic allocation (therefore referencing frame slots off
- // sp), leave the pseudo ops alone. We'll eliminate them later.
- if (RegInfo->hasReservedCallFrame(Fn) || RegInfo->hasFP(Fn))
+ // the target doesn't indicate otherwise, remove the call frame pseudos
+ // here. The sub/add sp instruction pairs are still inserted, but we don't
+ // need to track the SP adjustment for frame index elimination.
+ if (RegInfo->canSimplifyCallFramePseudos(Fn))
RegInfo->eliminateCallFramePseudoInstr(Fn, *I->getParent(), I);
}
}
void PEI::calculateCalleeSavedRegisters(MachineFunction &Fn) {
const TargetRegisterInfo *RegInfo = Fn.getTarget().getRegisterInfo();
const TargetFrameInfo *TFI = Fn.getTarget().getFrameInfo();
- MachineFrameInfo *FFI = Fn.getFrameInfo();
+ MachineFrameInfo *MFI = Fn.getFrameInfo();
// Get the callee saved register list...
const unsigned *CSRegs = RegInfo->getCalleeSavedRegs(&Fn);
if (CSRegs == 0 || CSRegs[0] == 0)
return;
+ // In Naked functions we aren't going to save any registers.
+ if (Fn.getFunction()->hasFnAttr(Attribute::Naked))
+ return;
+
// Figure out which *callee saved* registers are modified by the current
// function, thus needing to be saved and restored in the prolog/epilog.
const TargetRegisterClass * const *CSRegClasses =
// the TargetRegisterClass if the stack alignment is smaller. Use the
// min.
Align = std::min(Align, StackAlign);
- FrameIdx = FFI->CreateStackObject(RC->getSize(), Align, true);
+ FrameIdx = MFI->CreateStackObject(RC->getSize(), Align, true);
if ((unsigned)FrameIdx < MinCSFrameIndex) MinCSFrameIndex = FrameIdx;
if ((unsigned)FrameIdx > MaxCSFrameIndex) MaxCSFrameIndex = FrameIdx;
} else {
// Spill it to the stack where we must.
- FrameIdx = FFI->CreateFixedObject(RC->getSize(), FixedSlot->Offset,
+ FrameIdx = MFI->CreateFixedObject(RC->getSize(), FixedSlot->Offset,
true, false);
}
I->setFrameIdx(FrameIdx);
}
- FFI->setCalleeSavedInfo(CSI);
+ MFI->setCalleeSavedInfo(CSI);
}
/// insertCSRSpillsAndRestores - Insert spill and restore code for
///
void PEI::insertCSRSpillsAndRestores(MachineFunction &Fn) {
// Get callee saved register information.
- MachineFrameInfo *FFI = Fn.getFrameInfo();
- const std::vector<CalleeSavedInfo> &CSI = FFI->getCalleeSavedInfo();
+ MachineFrameInfo *MFI = Fn.getFrameInfo();
+ const std::vector<CalleeSavedInfo> &CSI = MFI->getCalleeSavedInfo();
- FFI->setCalleeSavedInfoValid(true);
+ MFI->setCalleeSavedInfoValid(true);
// Early exit if no callee saved registers are modified!
if (CSI.empty())
/// AdjustStackOffset - Helper function used to adjust the stack frame offset.
static inline void
-AdjustStackOffset(MachineFrameInfo *FFI, int FrameIdx,
+AdjustStackOffset(MachineFrameInfo *MFI, int FrameIdx,
bool StackGrowsDown, int64_t &Offset,
unsigned &MaxAlign) {
// If the stack grows down, add the object size to find the lowest address.
if (StackGrowsDown)
- Offset += FFI->getObjectSize(FrameIdx);
+ Offset += MFI->getObjectSize(FrameIdx);
- unsigned Align = FFI->getObjectAlignment(FrameIdx);
+ unsigned Align = MFI->getObjectAlignment(FrameIdx);
// If the alignment of this object is greater than that of the stack, then
// increase the stack alignment to match.
Offset = (Offset + Align - 1) / Align * Align;
if (StackGrowsDown) {
- FFI->setObjectOffset(FrameIdx, -Offset); // Set the computed offset
+ MFI->setObjectOffset(FrameIdx, -Offset); // Set the computed offset
} else {
- FFI->setObjectOffset(FrameIdx, Offset);
- Offset += FFI->getObjectSize(FrameIdx);
+ MFI->setObjectOffset(FrameIdx, Offset);
+ Offset += MFI->getObjectSize(FrameIdx);
}
}
TFI.getStackGrowthDirection() == TargetFrameInfo::StackGrowsDown;
// Loop over all of the stack objects, assigning sequential addresses...
- MachineFrameInfo *FFI = Fn.getFrameInfo();
+ MachineFrameInfo *MFI = Fn.getFrameInfo();
// Start at the beginning of the local area.
// The Offset is the distance from the stack top in the direction
// We currently don't support filling in holes in between fixed sized
// objects, so we adjust 'Offset' to point to the end of last fixed sized
// preallocated object.
- for (int i = FFI->getObjectIndexBegin(); i != 0; ++i) {
+ for (int i = MFI->getObjectIndexBegin(); i != 0; ++i) {
int64_t FixedOff;
if (StackGrowsDown) {
// The maximum distance from the stack pointer is at lower address of
// the object -- which is given by offset. For down growing stack
// the offset is negative, so we negate the offset to get the distance.
- FixedOff = -FFI->getObjectOffset(i);
+ FixedOff = -MFI->getObjectOffset(i);
} else {
// The maximum distance from the start pointer is at the upper
// address of the object.
- FixedOff = FFI->getObjectOffset(i) + FFI->getObjectSize(i);
+ FixedOff = MFI->getObjectOffset(i) + MFI->getObjectSize(i);
}
if (FixedOff > Offset) Offset = FixedOff;
}
for (unsigned i = MinCSFrameIndex; i <= MaxCSFrameIndex; ++i) {
// If stack grows down, we need to add size of find the lowest
// address of the object.
- Offset += FFI->getObjectSize(i);
+ Offset += MFI->getObjectSize(i);
- unsigned Align = FFI->getObjectAlignment(i);
+ unsigned Align = MFI->getObjectAlignment(i);
// Adjust to alignment boundary
Offset = (Offset+Align-1)/Align*Align;
- FFI->setObjectOffset(i, -Offset); // Set the computed offset
+ MFI->setObjectOffset(i, -Offset); // Set the computed offset
}
} else {
int MaxCSFI = MaxCSFrameIndex, MinCSFI = MinCSFrameIndex;
for (int i = MaxCSFI; i >= MinCSFI ; --i) {
- unsigned Align = FFI->getObjectAlignment(i);
+ unsigned Align = MFI->getObjectAlignment(i);
// Adjust to alignment boundary
Offset = (Offset+Align-1)/Align*Align;
- FFI->setObjectOffset(i, Offset);
- Offset += FFI->getObjectSize(i);
+ MFI->setObjectOffset(i, Offset);
+ Offset += MFI->getObjectSize(i);
}
}
- unsigned MaxAlign = FFI->getMaxAlignment();
+ unsigned MaxAlign = MFI->getMaxAlignment();
// Make sure the special register scavenging spill slot is closest to the
// frame pointer if a frame pointer is required.
if (RS && RegInfo->hasFP(Fn) && !RegInfo->needsStackRealignment(Fn)) {
int SFI = RS->getScavengingFrameIndex();
if (SFI >= 0)
- AdjustStackOffset(FFI, SFI, StackGrowsDown, Offset, MaxAlign);
+ AdjustStackOffset(MFI, SFI, StackGrowsDown, Offset, MaxAlign);
}
// Make sure that the stack protector comes before the local variables on the
// stack.
- if (FFI->getStackProtectorIndex() >= 0)
- AdjustStackOffset(FFI, FFI->getStackProtectorIndex(), StackGrowsDown,
+ if (MFI->getStackProtectorIndex() >= 0)
+ AdjustStackOffset(MFI, MFI->getStackProtectorIndex(), StackGrowsDown,
Offset, MaxAlign);
// Then assign frame offsets to stack objects that are not used to spill
// callee saved registers.
- for (unsigned i = 0, e = FFI->getObjectIndexEnd(); i != e; ++i) {
+ for (unsigned i = 0, e = MFI->getObjectIndexEnd(); i != e; ++i) {
if (i >= MinCSFrameIndex && i <= MaxCSFrameIndex)
continue;
if (RS && (int)i == RS->getScavengingFrameIndex())
continue;
- if (FFI->isDeadObjectIndex(i))
+ if (MFI->isDeadObjectIndex(i))
continue;
- if (FFI->getStackProtectorIndex() == (int)i)
+ if (MFI->getStackProtectorIndex() == (int)i)
continue;
- AdjustStackOffset(FFI, i, StackGrowsDown, Offset, MaxAlign);
+ AdjustStackOffset(MFI, i, StackGrowsDown, Offset, MaxAlign);
}
// Make sure the special register scavenging spill slot is closest to the
if (RS && (!RegInfo->hasFP(Fn) || RegInfo->needsStackRealignment(Fn))) {
int SFI = RS->getScavengingFrameIndex();
if (SFI >= 0)
- AdjustStackOffset(FFI, SFI, StackGrowsDown, Offset, MaxAlign);
+ AdjustStackOffset(MFI, SFI, StackGrowsDown, Offset, MaxAlign);
}
if (!RegInfo->targetHandlesStackFrameRounding()) {
// If we have reserved argument space for call sites in the function
// immediately on entry to the current function, count it as part of the
// overall stack size.
- if (FFI->hasCalls() && RegInfo->hasReservedCallFrame(Fn))
- Offset += FFI->getMaxCallFrameSize();
+ if (MFI->hasCalls() && RegInfo->hasReservedCallFrame(Fn))
+ Offset += MFI->getMaxCallFrameSize();
// Round up the size to a multiple of the alignment. If the function has
// any calls or alloca's, align to the target's StackAlignment value to
// otherwise, for leaf functions, align to the TransientStackAlignment
// value.
unsigned StackAlign;
- if (FFI->hasCalls() || FFI->hasVarSizedObjects() ||
- (RegInfo->needsStackRealignment(Fn) && FFI->getObjectIndexEnd() != 0))
+ if (MFI->hasCalls() || MFI->hasVarSizedObjects() ||
+ (RegInfo->needsStackRealignment(Fn) && MFI->getObjectIndexEnd() != 0))
StackAlign = TFI.getStackAlignment();
else
StackAlign = TFI.getTransientStackAlignment();
}
// Update frame info to pretend that this is part of the stack...
- FFI->setStackSize(Offset - LocalAreaOffset);
+ MFI->setStackSize(Offset - LocalAreaOffset);
}
// If this instruction has a FrameIndex operand, we need to
// use that target machine register info object to eliminate
// it.
- int Value;
+ TargetRegisterInfo::FrameIndexValue Value;
unsigned VReg =
TRI.eliminateFrameIndex(MI, SPAdj, &Value,
FrameIndexVirtualScavenging ? NULL : RS);
unsigned CurrentVirtReg = 0;
unsigned CurrentScratchReg = 0;
bool havePrevValue = false;
- int PrevValue = 0;
+ TargetRegisterInfo::FrameIndexValue PrevValue(0,0);
+ TargetRegisterInfo::FrameIndexValue Value(0,0);
MachineInstr *PrevLastUseMI = NULL;
unsigned PrevLastUseOp = 0;
bool trackingCurrentValue = false;
int SPAdj = 0;
- int Value = 0;
// The instruction stream may change in the loop, so check BB->end()
// directly.
if (trackingCurrentValue) {
SPAdj = (*Entry).second.second;
Value = (*Entry).second.first;
- } else
- SPAdj = Value = 0;
+ } else {
+ SPAdj = 0;
+ Value.first = 0;
+ Value.second = 0;
+ }
// If the scratch register from the last allocation is still
// available, see if the value matches. If it does, just re-use it.
projects / oota-llvm.git / blobdiff