//
// The LLVM Compiler Infrastructure
//
-// This file was developed by James M. Laskey and is distributed under
-// the University of Illinois Open Source License. See LICENSE.TXT for details.
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
/// stored. Also used as an anchor for instructions that need to be altered
/// when using frame pointers (dyna_add, dyna_sub.)
int FramePointerSaveIndex;
+
+ /// ReturnAddrSaveIndex - Frame index of where the return address is stored.
+ ///
+ int ReturnAddrSaveIndex;
+
+ /// MustSaveLR - Indicates whether LR is defined (or clobbered) in the current
+ /// function. This is only valid after the initial scan of the function by
+ /// PEI.
+ bool MustSaveLR;
+
+ /// SpillsCR - Indicates whether CR is spilled in the current function.
+ bool SpillsCR;
+
+ /// LRStoreRequired - The bool indicates whether there is some explicit use of
+ /// the LR/LR8 stack slot that is not obvious from scanning the code. This
+ /// requires that the code generator produce a store of LR to the stack on
+ /// entry, even though LR may otherwise apparently not be used.
+ bool LRStoreRequired;
+
+ /// MinReservedArea - This is the frame size that is at least reserved in a
+ /// potential caller (parameter+linkage area).
+ unsigned MinReservedArea;
+
+ /// TailCallSPDelta - Stack pointer delta used when tail calling. Maximum
+ /// amount the stack pointer is adjusted to make the frame bigger for tail
+ /// calls. Used for creating an area before the register spill area.
+ int TailCallSPDelta;
+
+ /// HasFastCall - Does this function contain a fast call. Used to determine
+ /// how the caller's stack pointer should be calculated (epilog/dynamicalloc).
+ bool HasFastCall;
public:
- PPCFunctionInfo(MachineFunction& MF)
- : FramePointerSaveIndex(0)
- {}
+ explicit PPCFunctionInfo(MachineFunction &MF)
+ : FramePointerSaveIndex(0),
+ ReturnAddrSaveIndex(0),
+ SpillsCR(false),
+ LRStoreRequired(false),
+ MinReservedArea(0),
+ TailCallSPDelta(0),
+ HasFastCall(false) {}
int getFramePointerSaveIndex() const { return FramePointerSaveIndex; }
void setFramePointerSaveIndex(int Idx) { FramePointerSaveIndex = Idx; }
+
+ int getReturnAddrSaveIndex() const { return ReturnAddrSaveIndex; }
+ void setReturnAddrSaveIndex(int idx) { ReturnAddrSaveIndex = idx; }
+
+ unsigned getMinReservedArea() const { return MinReservedArea; }
+ void setMinReservedArea(unsigned size) { MinReservedArea = size; }
+
+ int getTailCallSPDelta() const { return TailCallSPDelta; }
+ void setTailCallSPDelta(int size) { TailCallSPDelta = size; }
+
+ /// MustSaveLR - This is set when the prolog/epilog inserter does its initial
+ /// scan of the function. It is true if the LR/LR8 register is ever explicitly
+ /// defined/clobbered in the machine function (e.g. by calls and movpctolr,
+ /// which is used in PIC generation), or if the LR stack slot is explicitly
+ /// referenced by builtin_return_address.
+ void setMustSaveLR(bool U) { MustSaveLR = U; }
+ bool mustSaveLR() const { return MustSaveLR; }
+
+ void setSpillsCR() { SpillsCR = true; }
+ bool isCRSpilled() const { return SpillsCR; }
+
+ void setLRStoreRequired() { LRStoreRequired = true; }
+ bool isLRStoreRequired() const { return LRStoreRequired; }
+ void setHasFastCall() { HasFastCall = true; }
+ bool hasFastCall() const { return HasFastCall;}
};
} // end of namespace llvm