[llvm] r228996 - The return save offset can be computed at initialization time - do
Eric Christopher
echristo at gmail.com
Thu Feb 12 16:39:27 PST 2015
Author: echristo
Date: Thu Feb 12 18:39:27 2015
New Revision: 228996
URL: http://llvm.org/viewvc/llvm-project?rev=228996&view=rev
Log:
The return save offset can be computed at initialization time - do
so and save the value.
Modified:
llvm/trunk/lib/Target/PowerPC/PPCFrameLowering.cpp
llvm/trunk/lib/Target/PowerPC/PPCFrameLowering.h
llvm/trunk/lib/Target/PowerPC/PPCISelLowering.cpp
Modified: llvm/trunk/lib/Target/PowerPC/PPCFrameLowering.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/PowerPC/PPCFrameLowering.cpp?rev=228996&r1=228995&r2=228996&view=diff
==============================================================================
--- llvm/trunk/lib/Target/PowerPC/PPCFrameLowering.cpp (original)
+++ llvm/trunk/lib/Target/PowerPC/PPCFrameLowering.cpp Thu Feb 12 18:39:27 2015
@@ -36,10 +36,17 @@ static const uint16_t VRRegNo[] = {
PPC::V24, PPC::V25, PPC::V26, PPC::V27, PPC::V28, PPC::V29, PPC::V30, PPC::V31
};
+static unsigned computeReturnSaveOffset(const PPCSubtarget &STI) {
+ if (STI.isDarwinABI())
+ return STI.isPPC64() ? 16 : 8;
+ // SVR4 ABI:
+ return STI.isPPC64() ? 16 : 4;
+}
+
PPCFrameLowering::PPCFrameLowering(const PPCSubtarget &STI)
: TargetFrameLowering(TargetFrameLowering::StackGrowsDown,
(STI.hasQPX() || STI.isBGQ()) ? 32 : 16, 0),
- Subtarget(STI) {}
+ Subtarget(STI), ReturnSaveOffset(computeReturnSaveOffset(Subtarget)) {}
// With the SVR4 ABI, callee-saved registers have fixed offsets on the stack.
const PPCFrameLowering::SpillSlot *PPCFrameLowering::getCalleeSavedSpillSlots(
@@ -598,7 +605,7 @@ void PPCFrameLowering::emitPrologue(Mach
assert((isPPC64 || !isSVR4ABI || !(!FrameSize && (MustSaveLR || HasFP))) &&
"FrameSize must be >0 to save/restore the FP or LR for 32-bit SVR4.");
- int LROffset = PPCFrameLowering::getReturnSaveOffset(isPPC64, isDarwinABI);
+ int LROffset = getReturnSaveOffset();
int FPOffset = 0;
if (HasFP) {
@@ -936,7 +943,7 @@ void PPCFrameLowering::emitEpilogue(Mach
const MCInstrDesc& AddInst = TII.get( isPPC64 ? PPC::ADD8
: PPC::ADD4 );
- int LROffset = PPCFrameLowering::getReturnSaveOffset(isPPC64, isDarwinABI);
+ int LROffset = getReturnSaveOffset();
int FPOffset = 0;
if (HasFP) {
Modified: llvm/trunk/lib/Target/PowerPC/PPCFrameLowering.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/PowerPC/PPCFrameLowering.h?rev=228996&r1=228995&r2=228996&view=diff
==============================================================================
--- llvm/trunk/lib/Target/PowerPC/PPCFrameLowering.h (original)
+++ llvm/trunk/lib/Target/PowerPC/PPCFrameLowering.h Thu Feb 12 18:39:27 2015
@@ -23,6 +23,7 @@ class PPCSubtarget;
class PPCFrameLowering: public TargetFrameLowering {
const PPCSubtarget &Subtarget;
+ const unsigned ReturnSaveOffset;
public:
PPCFrameLowering(const PPCSubtarget &STI);
@@ -67,12 +68,7 @@ public:
/// getReturnSaveOffset - Return the previous frame offset to save the
/// return address.
- static unsigned getReturnSaveOffset(bool isPPC64, bool isDarwinABI) {
- if (isDarwinABI)
- return isPPC64 ? 16 : 8;
- // SVR4 ABI:
- return isPPC64 ? 16 : 4;
- }
+ unsigned getReturnSaveOffset() const { return ReturnSaveOffset; }
/// getTOCSaveOffset - Return the previous frame offset to save the
/// TOC register -- 64-bit SVR4 ABI only.
Modified: llvm/trunk/lib/Target/PowerPC/PPCISelLowering.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/PowerPC/PPCISelLowering.cpp?rev=228996&r1=228995&r2=228996&view=diff
==============================================================================
--- llvm/trunk/lib/Target/PowerPC/PPCISelLowering.cpp (original)
+++ llvm/trunk/lib/Target/PowerPC/PPCISelLowering.cpp Thu Feb 12 18:39:27 2015
@@ -3472,8 +3472,10 @@ static SDValue EmitTailCallStoreFPAndRet
if (SPDiff) {
// Calculate the new stack slot for the return address.
int SlotSize = isPPC64 ? 8 : 4;
- int NewRetAddrLoc = SPDiff + PPCFrameLowering::getReturnSaveOffset(isPPC64,
- isDarwinABI);
+ int NewRetAddrLoc = SPDiff +
+ MF.getSubtarget<PPCSubtarget>()
+ .getFrameLowering()
+ ->getReturnSaveOffset();
int NewRetAddr = MF.getFrameInfo()->CreateFixedObject(SlotSize,
NewRetAddrLoc, true);
EVT VT = isPPC64 ? MVT::i64 : MVT::i32;
@@ -5308,7 +5310,6 @@ SDValue
PPCTargetLowering::getReturnAddrFrameIndex(SelectionDAG & DAG) const {
MachineFunction &MF = DAG.getMachineFunction();
bool isPPC64 = Subtarget.isPPC64();
- bool isDarwinABI = Subtarget.isDarwinABI();
EVT PtrVT = DAG.getTargetLoweringInfo().getPointerTy();
// Get current frame pointer save index. The users of this index will be
@@ -5319,7 +5320,7 @@ PPCTargetLowering::getReturnAddrFrameInd
// If the frame pointer save index hasn't been defined yet.
if (!RASI) {
// Find out what the fix offset of the frame pointer save area.
- int LROffset = PPCFrameLowering::getReturnSaveOffset(isPPC64, isDarwinABI);
+ int LROffset = Subtarget.getFrameLowering()->getReturnSaveOffset();
// Allocate the frame index for frame pointer save area.
RASI = MF.getFrameInfo()->CreateFixedObject(isPPC64? 8 : 4, LROffset, false);
// Save the result.
@@ -9699,14 +9700,12 @@ SDValue PPCTargetLowering::LowerRETURNAD
PPCFunctionInfo *FuncInfo = MF.getInfo<PPCFunctionInfo>();
FuncInfo->setLRStoreRequired();
bool isPPC64 = Subtarget.isPPC64();
- bool isDarwinABI = Subtarget.isDarwinABI();
if (Depth > 0) {
SDValue FrameAddr = LowerFRAMEADDR(Op, DAG);
SDValue Offset =
-
- DAG.getConstant(PPCFrameLowering::getReturnSaveOffset(isPPC64, isDarwinABI),
- isPPC64? MVT::i64 : MVT::i32);
+ DAG.getConstant(Subtarget.getFrameLowering()->getReturnSaveOffset(),
+ isPPC64 ? MVT::i64 : MVT::i32);
return DAG.getLoad(getPointerTy(), dl, DAG.getEntryNode(),
DAG.getNode(ISD::ADD, dl, getPointerTy(),
FrameAddr, Offset),
More information about the llvm-commits
mailing list