}
}
- if (CSI.empty())
- return; // Early exit if no callee saved registers are modified!
-
- unsigned NumFixedSpillSlots;
- const TargetFrameLowering::SpillSlot *FixedSpillSlots =
- TFI->getCalleeSavedSpillSlots(NumFixedSpillSlots);
+ if (!TFI->assignCalleeSavedSpillSlots(F, RegInfo, CSI)) {
+ // If target doesn't implement this, use generic code.
+
+ if (CSI.empty())
+ return; // Early exit if no callee saved registers are modified!
+
+ unsigned NumFixedSpillSlots;
+ const TargetFrameLowering::SpillSlot *FixedSpillSlots =
+ TFI->getCalleeSavedSpillSlots(NumFixedSpillSlots);
+
+ // Now that we know which registers need to be saved and restored, allocate
+ // stack slots for them.
+ for (std::vector<CalleeSavedInfo>::iterator I = CSI.begin(), E = CSI.end();
+ I != E; ++I) {
+ unsigned Reg = I->getReg();
+ const TargetRegisterClass *RC = RegInfo->getMinimalPhysRegClass(Reg);
+
+ int FrameIdx;
+ if (RegInfo->hasReservedSpillSlot(F, Reg, FrameIdx)) {
+ I->setFrameIdx(FrameIdx);
+ continue;
+ }
- // Now that we know which registers need to be saved and restored, allocate
- // stack slots for them.
- for (std::vector<CalleeSavedInfo>::iterator
- I = CSI.begin(), E = CSI.end(); I != E; ++I) {
- unsigned Reg = I->getReg();
- const TargetRegisterClass *RC = RegInfo->getMinimalPhysRegClass(Reg);
+ // Check to see if this physreg must be spilled to a particular stack slot
+ // on this target.
+ const TargetFrameLowering::SpillSlot *FixedSlot = FixedSpillSlots;
+ while (FixedSlot != FixedSpillSlots + NumFixedSpillSlots &&
+ FixedSlot->Reg != Reg)
+ ++FixedSlot;
+
+ if (FixedSlot == FixedSpillSlots + NumFixedSpillSlots) {
+ // Nope, just spill it anywhere convenient.
+ unsigned Align = RC->getAlignment();
+ unsigned StackAlign = TFI->getStackAlignment();
+
+ // We may not be able to satisfy the desired alignment specification of
+ // the TargetRegisterClass if the stack alignment is smaller. Use the
+ // min.
+ Align = std::min(Align, StackAlign);
+ 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 =
+ MFI->CreateFixedSpillStackObject(RC->getSize(), FixedSlot->Offset);
+ }
- int FrameIdx;
- if (RegInfo->hasReservedSpillSlot(F, Reg, FrameIdx)) {
I->setFrameIdx(FrameIdx);
- continue;
}
-
- // Check to see if this physreg must be spilled to a particular stack slot
- // on this target.
- const TargetFrameLowering::SpillSlot *FixedSlot = FixedSpillSlots;
- while (FixedSlot != FixedSpillSlots+NumFixedSpillSlots &&
- FixedSlot->Reg != Reg)
- ++FixedSlot;
-
- if (FixedSlot == FixedSpillSlots + NumFixedSpillSlots) {
- // Nope, just spill it anywhere convenient.
- unsigned Align = RC->getAlignment();
- unsigned StackAlign = TFI->getStackAlignment();
-
- // We may not be able to satisfy the desired alignment specification of
- // the TargetRegisterClass if the stack alignment is smaller. Use the
- // min.
- Align = std::min(Align, StackAlign);
- 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 = MFI->CreateFixedObject(RC->getSize(), FixedSlot->Offset, true);
- }
-
- I->setFrameIdx(FrameIdx);
}
MFI->setCalleeSavedInfo(CSI);