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PPC LinkageSize can be computed at initialization time, do so.

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llvm-svn: 229163
This commit is contained in:
Eric Christopher 2015-02-13 22:22:57 +00:00
parent f99210d18e
commit 1c5ae15916
4 changed files with 20 additions and 27 deletions
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4
lib/Target/PowerPC/PPCFastISel.cpp
View File

@ -1237,9 +1237,7 @@ bool PPCFastISel::processCallArgs(SmallVectorImpl<Value*> &Args,
CCState CCInfo(CC, IsVarArg, *FuncInfo.MF, ArgLocs, *Context);
// Reserve space for the linkage area on the stack.
bool isELFv2ABI = PPCSubTarget->isELFv2ABI();
unsigned LinkageSize = PPCFrameLowering::getLinkageSize(true, false,
isELFv2ABI);
unsigned LinkageSize = PPCSubTarget->getFrameLowering()->getLinkageSize();
CCInfo.AllocateStack(LinkageSize, 8);
CCInfo.AnalyzeCallOperands(ArgVTs, ArgFlags, CC_PPC64_ELF_FIS);

15
lib/Target/PowerPC/PPCFrameLowering.cpp
View File

@ -60,12 +60,21 @@ static unsigned computeFramePointerSaveOffset(const PPCSubtarget &STI) {
return STI.isPPC64() ? -8U : -4U;
}
static unsigned computeLinkageSize(const PPCSubtarget &STI) {
if (STI.isDarwinABI() || STI.isPPC64())
return (STI.isELFv2ABI() ? 4 : 6) * (STI.isPPC64() ? 8 : 4);
// SVR4 ABI:
return 8;
}
PPCFrameLowering::PPCFrameLowering(const PPCSubtarget &STI)
: TargetFrameLowering(TargetFrameLowering::StackGrowsDown,
(STI.hasQPX() || STI.isBGQ()) ? 32 : 16, 0),
Subtarget(STI), ReturnSaveOffset(computeReturnSaveOffset(Subtarget)),
TOCSaveOffset(computeTOCSaveOffset(Subtarget)),
FramePointerSaveOffset(computeFramePointerSaveOffset(Subtarget)) {}
FramePointerSaveOffset(computeFramePointerSaveOffset(Subtarget)),
LinkageSize(computeLinkageSize(Subtarget)) {}
// With the SVR4 ABI, callee-saved registers have fixed offsets on the stack.
const PPCFrameLowering::SpillSlot *PPCFrameLowering::getCalleeSavedSpillSlots(
@ -441,9 +450,7 @@ unsigned PPCFrameLowering::determineFrameLayout(MachineFunction &MF,
unsigned maxCallFrameSize = MFI->getMaxCallFrameSize();
// Maximum call frame needs to be at least big enough for linkage area.
unsigned minCallFrameSize = getLinkageSize(Subtarget.isPPC64(),
Subtarget.isDarwinABI(),
Subtarget.isELFv2ABI());
unsigned minCallFrameSize = getLinkageSize();
maxCallFrameSize = std::max(maxCallFrameSize, minCallFrameSize);
// If we have dynamic alloca then maxCallFrameSize needs to be aligned so

10
lib/Target/PowerPC/PPCFrameLowering.h
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@ -26,6 +26,7 @@ class PPCFrameLowering: public TargetFrameLowering {
const unsigned ReturnSaveOffset;
const unsigned TOCSaveOffset;
const unsigned FramePointerSaveOffset;
const unsigned LinkageSize;
public:
PPCFrameLowering(const PPCSubtarget &STI);
@ -94,14 +95,7 @@ public:
/// getLinkageSize - Return the size of the PowerPC ABI linkage area.
///
static unsigned getLinkageSize(bool isPPC64, bool isDarwinABI,
bool isELFv2ABI) {
if (isDarwinABI || isPPC64)
return (isELFv2ABI ? 4 : 6) * (isPPC64 ? 8 : 4);
// SVR4 ABI:
return 8;
}
unsigned getLinkageSize() const { return LinkageSize; }
const SpillSlot *
getCalleeSavedSpillSlots(unsigned &NumEntries) const override;

18
lib/Target/PowerPC/PPCISelLowering.cpp
View File

@ -2432,7 +2432,7 @@ PPCTargetLowering::LowerFormalArguments_32SVR4(
*DAG.getContext());
// Reserve space for the linkage area on the stack.
unsigned LinkageSize = PPCFrameLowering::getLinkageSize(false, false, false);
unsigned LinkageSize = Subtarget.getFrameLowering()->getLinkageSize();
CCInfo.AllocateStack(LinkageSize, PtrByteSize);
CCInfo.AnalyzeFormalArguments(Ins, CC_PPC32_SVR4);
@ -2642,9 +2642,7 @@ PPCTargetLowering::LowerFormalArguments_64SVR4(
bool isImmutable = !(getTargetMachine().Options.GuaranteedTailCallOpt &&
(CallConv == CallingConv::Fast));
unsigned PtrByteSize = 8;
unsigned LinkageSize = PPCFrameLowering::getLinkageSize(true, false,
isELFv2ABI);
unsigned LinkageSize = Subtarget.getFrameLowering()->getLinkageSize();
static const MCPhysReg GPR[] = {
PPC::X3, PPC::X4, PPC::X5, PPC::X6,
@ -3009,9 +3007,7 @@ PPCTargetLowering::LowerFormalArguments_Darwin(
bool isImmutable = !(getTargetMachine().Options.GuaranteedTailCallOpt &&
(CallConv == CallingConv::Fast));
unsigned PtrByteSize = isPPC64 ? 8 : 4;
unsigned LinkageSize = PPCFrameLowering::getLinkageSize(isPPC64, true,
false);
unsigned LinkageSize = Subtarget.getFrameLowering()->getLinkageSize();
unsigned ArgOffset = LinkageSize;
// Area that is at least reserved in caller of this function.
unsigned MinReservedArea = ArgOffset;
@ -4067,7 +4063,7 @@ PPCTargetLowering::LowerCall_32SVR4(SDValue Chain, SDValue Callee,
*DAG.getContext());
// Reserve space for the linkage area on the stack.
CCInfo.AllocateStack(PPCFrameLowering::getLinkageSize(false, false, false),
CCInfo.AllocateStack(Subtarget.getFrameLowering()->getLinkageSize(),
PtrByteSize);
if (isVarArg) {
@ -4303,8 +4299,7 @@ PPCTargetLowering::LowerCall_64SVR4(SDValue Chain, SDValue Callee,
// area, and parameter passing area. On ELFv1, the linkage area is 48 bytes
// reserved space for [SP][CR][LR][2 x unused][TOC]; on ELFv2, the linkage
// area is 32 bytes reserved space for [SP][CR][LR][TOC].
unsigned LinkageSize = PPCFrameLowering::getLinkageSize(true, false,
isELFv2ABI);
unsigned LinkageSize = Subtarget.getFrameLowering()->getLinkageSize();
unsigned NumBytes = LinkageSize;
unsigned GPR_idx = 0, FPR_idx = 0, VR_idx = 0;
@ -4848,8 +4843,7 @@ PPCTargetLowering::LowerCall_Darwin(SDValue Chain, SDValue Callee,
// Count how many bytes are to be pushed on the stack, including the linkage
// area, and parameter passing area. We start with 24/48 bytes, which is
// prereserved space for [SP][CR][LR][3 x unused].
unsigned LinkageSize = PPCFrameLowering::getLinkageSize(isPPC64, true,
false);
unsigned LinkageSize = Subtarget.getFrameLowering()->getLinkageSize();
unsigned NumBytes = LinkageSize;
// Add up all the space actually used.