//
// The LLVM Compiler Infrastructure
//
-// This file was developed by Chris Lattner 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.
//
//===----------------------------------------------------------------------===//
//
#include "llvm/CodeGen/MachineFrameInfo.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/MachineInstrBuilder.h"
+#include "llvm/CodeGen/MachineRegisterInfo.h"
+#include "llvm/CodeGen/PseudoSourceValue.h"
#include "llvm/CodeGen/SelectionDAG.h"
-#include "llvm/CodeGen/SSARegMap.h"
#include "llvm/Constants.h"
#include "llvm/Function.h"
#include "llvm/Intrinsics.h"
addRegisterClass(MVT::f64, PPC::F8RCRegisterClass);
// PowerPC has an i16 but no i8 (or i1) SEXTLOAD
- setLoadXAction(ISD::SEXTLOAD, MVT::i1, Expand);
+ setLoadXAction(ISD::SEXTLOAD, MVT::i1, Promote);
setLoadXAction(ISD::SEXTLOAD, MVT::i8, Expand);
-
- // PowerPC does not have truncstore for i1.
- setStoreXAction(MVT::i1, Promote);
+ setTruncStoreAction(MVT::f64, MVT::f32, Expand);
+
// PowerPC has pre-inc load and store's.
setIndexedLoadAction(ISD::PRE_INC, MVT::i1, Legal);
setIndexedLoadAction(ISD::PRE_INC, MVT::i8, Legal);
setIndexedStoreAction(ISD::PRE_INC, MVT::i32, Legal);
setIndexedStoreAction(ISD::PRE_INC, MVT::i64, Legal);
- setOperationAction(ISD::ConstantFP, MVT::f64, Expand);
- setOperationAction(ISD::ConstantFP, MVT::f32, Expand);
+ // Shortening conversions involving ppcf128 get expanded (2 regs -> 1 reg)
+ setConvertAction(MVT::ppcf128, MVT::f64, Expand);
+ setConvertAction(MVT::ppcf128, MVT::f32, Expand);
+ // This is used in the ppcf128->int sequence. Note it has different semantics
+ // from FP_ROUND: that rounds to nearest, this rounds to zero.
+ setOperationAction(ISD::FP_ROUND_INREG, MVT::ppcf128, Custom);
// PowerPC has no intrinsics for these particular operations
setOperationAction(ISD::MEMMOVE, MVT::Other, Expand);
setOperationAction(ISD::MEMSET, MVT::Other, Expand);
setOperationAction(ISD::MEMCPY, MVT::Other, Expand);
-
+ setOperationAction(ISD::MEMBARRIER, MVT::Other, Expand);
+ setOperationAction(ISD::PREFETCH, MVT::Other, Expand);
+
// PowerPC has no SREM/UREM instructions
setOperationAction(ISD::SREM, MVT::i32, Expand);
setOperationAction(ISD::UREM, MVT::i32, Expand);
setOperationAction(ISD::SREM, MVT::i64, Expand);
setOperationAction(ISD::UREM, MVT::i64, Expand);
-
- // We don't support sin/cos/sqrt/fmod
+
+ // Don't use SMUL_LOHI/UMUL_LOHI or SDIVREM/UDIVREM to lower SREM/UREM.
+ setOperationAction(ISD::UMUL_LOHI, MVT::i32, Expand);
+ setOperationAction(ISD::SMUL_LOHI, MVT::i32, Expand);
+ setOperationAction(ISD::UMUL_LOHI, MVT::i64, Expand);
+ setOperationAction(ISD::SMUL_LOHI, MVT::i64, Expand);
+ setOperationAction(ISD::UDIVREM, MVT::i32, Expand);
+ setOperationAction(ISD::SDIVREM, MVT::i32, Expand);
+ setOperationAction(ISD::UDIVREM, MVT::i64, Expand);
+ setOperationAction(ISD::SDIVREM, MVT::i64, Expand);
+
+ // We don't support sin/cos/sqrt/fmod/pow
setOperationAction(ISD::FSIN , MVT::f64, Expand);
setOperationAction(ISD::FCOS , MVT::f64, Expand);
setOperationAction(ISD::FREM , MVT::f64, Expand);
+ setOperationAction(ISD::FPOW , MVT::f64, Expand);
setOperationAction(ISD::FSIN , MVT::f32, Expand);
setOperationAction(ISD::FCOS , MVT::f32, Expand);
setOperationAction(ISD::FREM , MVT::f32, Expand);
+ setOperationAction(ISD::FPOW , MVT::f32, Expand);
+
+ setOperationAction(ISD::FLT_ROUNDS_, MVT::i32, Custom);
// If we're enabling GP optimizations, use hardware square root
if (!TM.getSubtarget<PPCSubtarget>().hasFSQRT()) {
// Support label based line numbers.
setOperationAction(ISD::LOCATION, MVT::Other, Expand);
setOperationAction(ISD::DEBUG_LOC, MVT::Other, Expand);
- if (!TM.getSubtarget<PPCSubtarget>().isDarwin()) {
- setOperationAction(ISD::LABEL, MVT::Other, Expand);
- } else {
- setOperationAction(ISD::EXCEPTIONADDR, MVT::i64, Expand);
- setOperationAction(ISD::EHSELECTION, MVT::i64, Expand);
- setOperationAction(ISD::EXCEPTIONADDR, MVT::i32, Expand);
- setOperationAction(ISD::EHSELECTION, MVT::i32, Expand);
- }
+
+ setOperationAction(ISD::EXCEPTIONADDR, MVT::i64, Expand);
+ setOperationAction(ISD::EHSELECTION, MVT::i64, Expand);
+ setOperationAction(ISD::EXCEPTIONADDR, MVT::i32, Expand);
+ setOperationAction(ISD::EHSELECTION, MVT::i32, Expand);
+
// We want to legalize GlobalAddress and ConstantPool nodes into the
// appropriate instructions to materialize the address.
}
if (TM.getSubtarget<PPCSubtarget>().use64BitRegs()) {
- // 64 bit PowerPC implementations can support i64 types directly
+ // 64-bit PowerPC implementations can support i64 types directly
addRegisterClass(MVT::i64, PPC::G8RCRegisterClass);
// BUILD_PAIR can't be handled natively, and should be expanded to shl/or
setOperationAction(ISD::BUILD_PAIR, MVT::i64, Expand);
+ // 64-bit PowerPC wants to expand i128 shifts itself.
+ setOperationAction(ISD::SHL_PARTS, MVT::i64, Custom);
+ setOperationAction(ISD::SRA_PARTS, MVT::i64, Custom);
+ setOperationAction(ISD::SRL_PARTS, MVT::i64, Custom);
} else {
- // 32 bit PowerPC wants to expand i64 shifts itself.
+ // 32-bit PowerPC wants to expand i64 shifts itself.
setOperationAction(ISD::SHL_PARTS, MVT::i32, Custom);
setOperationAction(ISD::SRA_PARTS, MVT::i32, Custom);
setOperationAction(ISD::SRL_PARTS, MVT::i32, Custom);
setOperationAction(ISD::EXTRACT_VECTOR_ELT, (MVT::ValueType)VT, Expand);
setOperationAction(ISD::INSERT_VECTOR_ELT, (MVT::ValueType)VT, Expand);
setOperationAction(ISD::BUILD_VECTOR, (MVT::ValueType)VT, Expand);
-
+ setOperationAction(ISD::UMUL_LOHI, (MVT::ValueType)VT, Expand);
+ setOperationAction(ISD::SMUL_LOHI, (MVT::ValueType)VT, Expand);
+ setOperationAction(ISD::UDIVREM, (MVT::ValueType)VT, Expand);
+ setOperationAction(ISD::SDIVREM, (MVT::ValueType)VT, Expand);
setOperationAction(ISD::SCALAR_TO_VECTOR, (MVT::ValueType)VT, Expand);
+ setOperationAction(ISD::FPOW, (MVT::ValueType)VT, Expand);
+ setOperationAction(ISD::CTPOP, (MVT::ValueType)VT, Expand);
+ setOperationAction(ISD::CTLZ, (MVT::ValueType)VT, Expand);
+ setOperationAction(ISD::CTTZ, (MVT::ValueType)VT, Expand);
}
// We can custom expand all VECTOR_SHUFFLEs to VPERM, others we can handle
setTargetDAGCombine(ISD::BR_CC);
setTargetDAGCombine(ISD::BSWAP);
+ // Darwin long double math library functions have $LDBL128 appended.
+ if (TM.getSubtarget<PPCSubtarget>().isDarwin()) {
+ setLibcallName(RTLIB::COS_PPCF128, "cosl$LDBL128");
+ setLibcallName(RTLIB::POW_PPCF128, "powl$LDBL128");
+ setLibcallName(RTLIB::REM_PPCF128, "fmodl$LDBL128");
+ setLibcallName(RTLIB::SIN_PPCF128, "sinl$LDBL128");
+ setLibcallName(RTLIB::SQRT_PPCF128, "sqrtl$LDBL128");
+ }
+
computeRegisterProperties();
}
+/// getByValTypeAlignment - Return the desired alignment for ByVal aggregate
+/// function arguments in the caller parameter area.
+unsigned PPCTargetLowering::getByValTypeAlignment(const Type *Ty) const {
+ TargetMachine &TM = getTargetMachine();
+ // Darwin passes everything on 4 byte boundary.
+ if (TM.getSubtarget<PPCSubtarget>().isDarwin())
+ return 4;
+ // FIXME Elf TBD
+ return 4;
+}
+
const char *PPCTargetLowering::getTargetNodeName(unsigned Opcode) const {
switch (Opcode) {
default: return 0;
case PPCISD::LBRX: return "PPCISD::LBRX";
case PPCISD::STBRX: return "PPCISD::STBRX";
case PPCISD::COND_BRANCH: return "PPCISD::COND_BRANCH";
+ case PPCISD::MFFS: return "PPCISD::MFFS";
+ case PPCISD::MTFSB0: return "PPCISD::MTFSB0";
+ case PPCISD::MTFSB1: return "PPCISD::MTFSB1";
+ case PPCISD::FADDRTZ: return "PPCISD::FADDRTZ";
+ case PPCISD::MTFSF: return "PPCISD::MTFSF";
}
}
// If this is an or of disjoint bitfields, we can codegen this as an add
// (for better address arithmetic) if the LHS and RHS of the OR are provably
// disjoint.
- uint64_t LHSKnownZero, LHSKnownOne;
- uint64_t RHSKnownZero, RHSKnownOne;
- DAG.ComputeMaskedBits(N.getOperand(0), ~0U, LHSKnownZero, LHSKnownOne);
+ APInt LHSKnownZero, LHSKnownOne;
+ APInt RHSKnownZero, RHSKnownOne;
+ DAG.ComputeMaskedBits(N.getOperand(0),
+ APInt::getAllOnesValue(N.getOperand(0)
+ .getValueSizeInBits()),
+ LHSKnownZero, LHSKnownOne);
- if (LHSKnownZero) {
- DAG.ComputeMaskedBits(N.getOperand(1), ~0U, RHSKnownZero, RHSKnownOne);
+ if (LHSKnownZero.getBoolValue()) {
+ DAG.ComputeMaskedBits(N.getOperand(1),
+ APInt::getAllOnesValue(N.getOperand(1)
+ .getValueSizeInBits()),
+ RHSKnownZero, RHSKnownOne);
// If all of the bits are known zero on the LHS or RHS, the add won't
// carry.
- if ((LHSKnownZero | RHSKnownZero) == ~0U) {
+ if (~(LHSKnownZero | RHSKnownZero) == 0) {
Base = N.getOperand(0);
Index = N.getOperand(1);
return true;
// If this is an or of disjoint bitfields, we can codegen this as an add
// (for better address arithmetic) if the LHS and RHS of the OR are
// provably disjoint.
- uint64_t LHSKnownZero, LHSKnownOne;
- DAG.ComputeMaskedBits(N.getOperand(0), ~0U, LHSKnownZero, LHSKnownOne);
- if ((LHSKnownZero|~(unsigned)imm) == ~0U) {
+ APInt LHSKnownZero, LHSKnownOne;
+ DAG.ComputeMaskedBits(N.getOperand(0),
+ APInt::getAllOnesValue(32),
+ LHSKnownZero, LHSKnownOne);
+ if ((LHSKnownZero.getZExtValue()|~(uint64_t)imm) == ~0ULL) {
// If all of the bits are known zero on the LHS or RHS, the add won't
// carry.
Base = N.getOperand(0);
// If this is an or of disjoint bitfields, we can codegen this as an add
// (for better address arithmetic) if the LHS and RHS of the OR are
// provably disjoint.
- uint64_t LHSKnownZero, LHSKnownOne;
- DAG.ComputeMaskedBits(N.getOperand(0), ~0U, LHSKnownZero, LHSKnownOne);
- if ((LHSKnownZero|~(unsigned)imm) == ~0U) {
+ APInt LHSKnownZero, LHSKnownOne;
+ DAG.ComputeMaskedBits(N.getOperand(0),
+ APInt::getAllOnesValue(32),
+ LHSKnownZero, LHSKnownOne);
+ if ((LHSKnownZero.getZExtValue()|~(uint64_t)imm) == ~0ULL) {
// If all of the bits are known zero on the LHS or RHS, the add won't
// carry.
Base = N.getOperand(0);
MVT::ValueType VT;
if (LoadSDNode *LD = dyn_cast<LoadSDNode>(N)) {
Ptr = LD->getBasePtr();
- VT = LD->getLoadedVT();
+ VT = LD->getMemoryVT();
} else if (StoreSDNode *ST = dyn_cast<StoreSDNode>(N)) {
ST = ST;
Ptr = ST->getBasePtr();
- VT = ST->getStoredVT();
+ VT = ST->getMemoryVT();
} else
return false;
if (LoadSDNode *LD = dyn_cast<LoadSDNode>(N)) {
// PPC64 doesn't have lwau, but it does have lwaux. Reject preinc load of
// sext i32 to i64 when addr mode is r+i.
- if (LD->getValueType(0) == MVT::i64 && LD->getLoadedVT() == MVT::i32 &&
+ if (LD->getValueType(0) == MVT::i64 && LD->getMemoryVT() == MVT::i32 &&
LD->getExtensionType() == ISD::SEXTLOAD &&
isa<ConstantSDNode>(Offset))
return false;
// LowerOperation implementation
//===----------------------------------------------------------------------===//
-static SDOperand LowerConstantPool(SDOperand Op, SelectionDAG &DAG) {
+SDOperand PPCTargetLowering::LowerConstantPool(SDOperand Op,
+ SelectionDAG &DAG) {
MVT::ValueType PtrVT = Op.getValueType();
ConstantPoolSDNode *CP = cast<ConstantPoolSDNode>(Op);
Constant *C = CP->getConstVal();
return Lo;
}
-static SDOperand LowerJumpTable(SDOperand Op, SelectionDAG &DAG) {
+SDOperand PPCTargetLowering::LowerJumpTable(SDOperand Op, SelectionDAG &DAG) {
MVT::ValueType PtrVT = Op.getValueType();
JumpTableSDNode *JT = cast<JumpTableSDNode>(Op);
SDOperand JTI = DAG.getTargetJumpTable(JT->getIndex(), PtrVT);
return Lo;
}
-static SDOperand LowerGlobalTLSAddress(SDOperand Op, SelectionDAG &DAG) {
+SDOperand PPCTargetLowering::LowerGlobalTLSAddress(SDOperand Op,
+ SelectionDAG &DAG) {
assert(0 && "TLS not implemented for PPC.");
}
-static SDOperand LowerGlobalAddress(SDOperand Op, SelectionDAG &DAG) {
+SDOperand PPCTargetLowering::LowerGlobalAddress(SDOperand Op,
+ SelectionDAG &DAG) {
MVT::ValueType PtrVT = Op.getValueType();
GlobalAddressSDNode *GSDN = cast<GlobalAddressSDNode>(Op);
GlobalValue *GV = GSDN->getGlobal();
SDOperand GA = DAG.getTargetGlobalAddress(GV, PtrVT, GSDN->getOffset());
+ // If it's a debug information descriptor, don't mess with it.
+ if (DAG.isVerifiedDebugInfoDesc(Op))
+ return GA;
SDOperand Zero = DAG.getConstant(0, PtrVT);
const TargetMachine &TM = DAG.getTarget();
return DAG.getLoad(PtrVT, DAG.getEntryNode(), Lo, NULL, 0);
}
-static SDOperand LowerSETCC(SDOperand Op, SelectionDAG &DAG) {
+SDOperand PPCTargetLowering::LowerSETCC(SDOperand Op, SelectionDAG &DAG) {
ISD::CondCode CC = cast<CondCodeSDNode>(Op.getOperand(2))->get();
// If we're comparing for equality to zero, expose the fact that this is
return SDOperand();
}
-static SDOperand LowerVAARG(SDOperand Op, SelectionDAG &DAG,
+SDOperand PPCTargetLowering::LowerVAARG(SDOperand Op, SelectionDAG &DAG,
int VarArgsFrameIndex,
int VarArgsStackOffset,
unsigned VarArgsNumGPR,
assert(0 && "VAARG in ELF32 ABI not implemented yet!");
}
-static SDOperand LowerVASTART(SDOperand Op, SelectionDAG &DAG,
+SDOperand PPCTargetLowering::LowerVASTART(SDOperand Op, SelectionDAG &DAG,
int VarArgsFrameIndex,
int VarArgsStackOffset,
unsigned VarArgsNumGPR,
// memory location argument.
MVT::ValueType PtrVT = DAG.getTargetLoweringInfo().getPointerTy();
SDOperand FR = DAG.getFrameIndex(VarArgsFrameIndex, PtrVT);
- SrcValueSDNode *SV = cast<SrcValueSDNode>(Op.getOperand(2));
- return DAG.getStore(Op.getOperand(0), FR, Op.getOperand(1), SV->getValue(),
- SV->getOffset());
+ const Value *SV = cast<SrcValueSDNode>(Op.getOperand(2))->getValue();
+ return DAG.getStore(Op.getOperand(0), FR, Op.getOperand(1), SV, 0);
}
// For ELF 32 ABI we follow the layout of the va_list struct.
MVT::ValueType PtrVT = DAG.getTargetLoweringInfo().getPointerTy();
- SDOperand StackOffset = DAG.getFrameIndex(VarArgsStackOffset, PtrVT);
+ SDOperand StackOffsetFI = DAG.getFrameIndex(VarArgsStackOffset, PtrVT);
SDOperand FR = DAG.getFrameIndex(VarArgsFrameIndex, PtrVT);
- SDOperand ConstFrameOffset = DAG.getConstant(MVT::getSizeInBits(PtrVT)/8,
- PtrVT);
- SDOperand ConstStackOffset = DAG.getConstant(MVT::getSizeInBits(PtrVT)/8 - 1,
- PtrVT);
- SDOperand ConstFPROffset = DAG.getConstant(1, PtrVT);
+ uint64_t FrameOffset = MVT::getSizeInBits(PtrVT)/8;
+ SDOperand ConstFrameOffset = DAG.getConstant(FrameOffset, PtrVT);
+
+ uint64_t StackOffset = MVT::getSizeInBits(PtrVT)/8 - 1;
+ SDOperand ConstStackOffset = DAG.getConstant(StackOffset, PtrVT);
+
+ uint64_t FPROffset = 1;
+ SDOperand ConstFPROffset = DAG.getConstant(FPROffset, PtrVT);
- SrcValueSDNode *SV = cast<SrcValueSDNode>(Op.getOperand(2));
+ const Value *SV = cast<SrcValueSDNode>(Op.getOperand(2))->getValue();
// Store first byte : number of int regs
SDOperand firstStore = DAG.getStore(Op.getOperand(0), ArgGPR,
- Op.getOperand(1), SV->getValue(),
- SV->getOffset());
+ Op.getOperand(1), SV, 0);
+ uint64_t nextOffset = FPROffset;
SDOperand nextPtr = DAG.getNode(ISD::ADD, PtrVT, Op.getOperand(1),
ConstFPROffset);
// Store second byte : number of float regs
- SDOperand secondStore = DAG.getStore(firstStore, ArgFPR, nextPtr,
- SV->getValue(), SV->getOffset());
+ SDOperand secondStore =
+ DAG.getStore(firstStore, ArgFPR, nextPtr, SV, nextOffset);
+ nextOffset += StackOffset;
nextPtr = DAG.getNode(ISD::ADD, PtrVT, nextPtr, ConstStackOffset);
// Store second word : arguments given on stack
- SDOperand thirdStore = DAG.getStore(secondStore, StackOffset, nextPtr,
- SV->getValue(), SV->getOffset());
+ SDOperand thirdStore =
+ DAG.getStore(secondStore, StackOffsetFI, nextPtr, SV, nextOffset);
+ nextOffset += FrameOffset;
nextPtr = DAG.getNode(ISD::ADD, PtrVT, nextPtr, ConstFrameOffset);
// Store third word : arguments given in registers
- return DAG.getStore(thirdStore, FR, nextPtr, SV->getValue(),
- SV->getOffset());
+ return DAG.getStore(thirdStore, FR, nextPtr, SV, nextOffset);
}
return FPR;
}
-static SDOperand LowerFORMAL_ARGUMENTS(SDOperand Op, SelectionDAG &DAG,
- int &VarArgsFrameIndex,
- int &VarArgsStackOffset,
- unsigned &VarArgsNumGPR,
- unsigned &VarArgsNumFPR,
- const PPCSubtarget &Subtarget) {
+SDOperand
+PPCTargetLowering::LowerFORMAL_ARGUMENTS(SDOperand Op,
+ SelectionDAG &DAG,
+ int &VarArgsFrameIndex,
+ int &VarArgsStackOffset,
+ unsigned &VarArgsNumGPR,
+ unsigned &VarArgsNumFPR,
+ const PPCSubtarget &Subtarget) {
// TODO: add description of PPC stack frame format, or at least some docs.
//
MachineFunction &MF = DAG.getMachineFunction();
MachineFrameInfo *MFI = MF.getFrameInfo();
- SSARegMap *RegMap = MF.getSSARegMap();
+ MachineRegisterInfo &RegInfo = MF.getRegInfo();
SmallVector<SDOperand, 8> ArgValues;
SDOperand Root = Op.getOperand(0);
// represented with two words (long long or double) must be copied to an
// even GPR_idx value or to an even ArgOffset value.
+ SmallVector<SDOperand, 8> MemOps;
+
for (unsigned ArgNo = 0, e = Op.Val->getNumValues()-1; ArgNo != e; ++ArgNo) {
SDOperand ArgVal;
bool needsLoad = false;
unsigned ArgSize = ObjSize;
unsigned Flags = cast<ConstantSDNode>(Op.getOperand(ArgNo+3))->getValue();
unsigned AlignFlag = 1 << ISD::ParamFlags::OrigAlignmentOffs;
+ unsigned isByVal = Flags & ISD::ParamFlags::ByVal;
// See if next argument requires stack alignment in ELF
bool Expand = (ObjectVT == MVT::f64) || ((ArgNo + 1 < e) &&
(cast<ConstantSDNode>(Op.getOperand(ArgNo+4))->getValue() & AlignFlag) &&
(!(Flags & AlignFlag)));
unsigned CurArgOffset = ArgOffset;
+
+ // FIXME alignment for ELF may not be right
+ // FIXME the codegen can be much improved in some cases.
+ // We do not have to keep everything in memory.
+ if (isByVal) {
+ // ObjSize is the true size, ArgSize rounded up to multiple of registers.
+ ObjSize = (Flags & ISD::ParamFlags::ByValSize) >>
+ ISD::ParamFlags::ByValSizeOffs;
+ ArgSize = ((ObjSize + PtrByteSize - 1)/PtrByteSize) * PtrByteSize;
+ // Double word align in ELF
+ if (Expand && isELF32_ABI) GPR_idx += (GPR_idx % 2);
+ // Objects of size 1 and 2 are right justified, everything else is
+ // left justified. This means the memory address is adjusted forwards.
+ if (ObjSize==1 || ObjSize==2) {
+ CurArgOffset = CurArgOffset + (4 - ObjSize);
+ }
+ // The value of the object is its address.
+ int FI = MFI->CreateFixedObject(ObjSize, CurArgOffset);
+ SDOperand FIN = DAG.getFrameIndex(FI, PtrVT);
+ ArgValues.push_back(FIN);
+ if (ObjSize==1 || ObjSize==2) {
+ if (GPR_idx != Num_GPR_Regs) {
+ unsigned VReg = RegInfo.createVirtualRegister(&PPC::GPRCRegClass);
+ RegInfo.addLiveIn(GPR[GPR_idx], VReg);
+ SDOperand Val = DAG.getCopyFromReg(Root, VReg, PtrVT);
+ SDOperand Store = DAG.getTruncStore(Val.getValue(1), Val, FIN,
+ NULL, 0, ObjSize==1 ? MVT::i8 : MVT::i16 );
+ MemOps.push_back(Store);
+ ++GPR_idx;
+ if (isMachoABI) ArgOffset += PtrByteSize;
+ } else {
+ ArgOffset += PtrByteSize;
+ }
+ continue;
+ }
+ for (unsigned j = 0; j < ArgSize; j += PtrByteSize) {
+ // Store whatever pieces of the object are in registers
+ // to memory. ArgVal will be address of the beginning of
+ // the object.
+ if (GPR_idx != Num_GPR_Regs) {
+ unsigned VReg = RegInfo.createVirtualRegister(&PPC::GPRCRegClass);
+ RegInfo.addLiveIn(GPR[GPR_idx], VReg);
+ int FI = MFI->CreateFixedObject(PtrByteSize, ArgOffset);
+ SDOperand FIN = DAG.getFrameIndex(FI, PtrVT);
+ SDOperand Val = DAG.getCopyFromReg(Root, VReg, PtrVT);
+ SDOperand Store = DAG.getStore(Val.getValue(1), Val, FIN, NULL, 0);
+ MemOps.push_back(Store);
+ ++GPR_idx;
+ if (isMachoABI) ArgOffset += PtrByteSize;
+ } else {
+ ArgOffset += ArgSize - (ArgOffset-CurArgOffset);
+ break;
+ }
+ }
+ continue;
+ }
+
switch (ObjectVT) {
default: assert(0 && "Unhandled argument type!");
case MVT::i32:
- // Double word align in ELF
- if (Expand && isELF32_ABI) GPR_idx += (GPR_idx % 2);
- if (GPR_idx != Num_GPR_Regs) {
- unsigned VReg = RegMap->createVirtualRegister(&PPC::GPRCRegClass);
- MF.addLiveIn(GPR[GPR_idx], VReg);
- ArgVal = DAG.getCopyFromReg(Root, VReg, MVT::i32);
- ++GPR_idx;
- } else {
- needsLoad = true;
- ArgSize = PtrByteSize;
+ if (!isPPC64) {
+ // Double word align in ELF
+ if (Expand && isELF32_ABI) GPR_idx += (GPR_idx % 2);
+
+ if (GPR_idx != Num_GPR_Regs) {
+ unsigned VReg = RegInfo.createVirtualRegister(&PPC::GPRCRegClass);
+ RegInfo.addLiveIn(GPR[GPR_idx], VReg);
+ ArgVal = DAG.getCopyFromReg(Root, VReg, MVT::i32);
+ ++GPR_idx;
+ } else {
+ needsLoad = true;
+ ArgSize = PtrByteSize;
+ }
+ // Stack align in ELF
+ if (needsLoad && Expand && isELF32_ABI)
+ ArgOffset += ((ArgOffset/4) % 2) * PtrByteSize;
+ // All int arguments reserve stack space in Macho ABI.
+ if (isMachoABI || needsLoad) ArgOffset += PtrByteSize;
+ break;
}
- // Stack align in ELF
- if (needsLoad && Expand && isELF32_ABI)
- ArgOffset += ((ArgOffset/4) % 2) * PtrByteSize;
- // All int arguments reserve stack space in Macho ABI.
- if (isMachoABI || needsLoad) ArgOffset += PtrByteSize;
- break;
-
+ // FALLTHROUGH
case MVT::i64: // PPC64
if (GPR_idx != Num_GPR_Regs) {
- unsigned VReg = RegMap->createVirtualRegister(&PPC::G8RCRegClass);
- MF.addLiveIn(GPR[GPR_idx], VReg);
+ unsigned VReg = RegInfo.createVirtualRegister(&PPC::G8RCRegClass);
+ RegInfo.addLiveIn(GPR[GPR_idx], VReg);
ArgVal = DAG.getCopyFromReg(Root, VReg, MVT::i64);
+
+ if (ObjectVT == MVT::i32) {
+ // PPC64 passes i8, i16, and i32 values in i64 registers. Promote
+ // value to MVT::i64 and then truncate to the correct register size.
+ if (Flags & ISD::ParamFlags::SExt)
+ ArgVal = DAG.getNode(ISD::AssertSext, MVT::i64, ArgVal,
+ DAG.getValueType(ObjectVT));
+ else if (Flags & ISD::ParamFlags::ZExt)
+ ArgVal = DAG.getNode(ISD::AssertZext, MVT::i64, ArgVal,
+ DAG.getValueType(ObjectVT));
+
+ ArgVal = DAG.getNode(ISD::TRUNCATE, MVT::i32, ArgVal);
+ }
+
++GPR_idx;
} else {
needsLoad = true;
if (FPR_idx != Num_FPR_Regs) {
unsigned VReg;
if (ObjectVT == MVT::f32)
- VReg = RegMap->createVirtualRegister(&PPC::F4RCRegClass);
+ VReg = RegInfo.createVirtualRegister(&PPC::F4RCRegClass);
else
- VReg = RegMap->createVirtualRegister(&PPC::F8RCRegClass);
- MF.addLiveIn(FPR[FPR_idx], VReg);
+ VReg = RegInfo.createVirtualRegister(&PPC::F8RCRegClass);
+ RegInfo.addLiveIn(FPR[FPR_idx], VReg);
ArgVal = DAG.getCopyFromReg(Root, VReg, ObjectVT);
++FPR_idx;
} else {
case MVT::v16i8:
// Note that vector arguments in registers don't reserve stack space.
if (VR_idx != Num_VR_Regs) {
- unsigned VReg = RegMap->createVirtualRegister(&PPC::VRRCRegClass);
- MF.addLiveIn(VR[VR_idx], VReg);
+ unsigned VReg = RegInfo.createVirtualRegister(&PPC::VRRCRegClass);
+ RegInfo.addLiveIn(VR[VR_idx], VReg);
ArgVal = DAG.getCopyFromReg(Root, VReg, ObjectVT);
++VR_idx;
} else {
}
// We need to load the argument to a virtual register if we determined above
- // that we ran out of physical registers of the appropriate type
+ // that we ran out of physical registers of the appropriate type.
if (needsLoad) {
- // If the argument is actually used, emit a load from the right stack
- // slot.
- if (!Op.Val->hasNUsesOfValue(0, ArgNo)) {
- int FI = MFI->CreateFixedObject(ObjSize,
- CurArgOffset + (ArgSize - ObjSize));
- SDOperand FIN = DAG.getFrameIndex(FI, PtrVT);
- ArgVal = DAG.getLoad(ObjectVT, Root, FIN, NULL, 0);
- } else {
- // Don't emit a dead load.
- ArgVal = DAG.getNode(ISD::UNDEF, ObjectVT);
- }
+ int FI = MFI->CreateFixedObject(ObjSize,
+ CurArgOffset + (ArgSize - ObjSize));
+ SDOperand FIN = DAG.getFrameIndex(FI, PtrVT);
+ ArgVal = DAG.getLoad(ObjectVT, Root, FIN, NULL, 0);
}
ArgValues.push_back(ArgVal);
}
-
+
// If the function takes variable number of arguments, make a frame index for
// the start of the first vararg value... for expansion of llvm.va_start.
bool isVarArg = cast<ConstantSDNode>(Op.getOperand(2))->getValue() != 0;
depth);
SDOperand FIN = DAG.getFrameIndex(VarArgsFrameIndex, PtrVT);
- SmallVector<SDOperand, 8> MemOps;
-
// In ELF 32 ABI, the fixed integer arguments of a variadic function are
// stored to the VarArgsFrameIndex on the stack.
if (isELF32_ABI) {
for (; GPR_idx != Num_GPR_Regs; ++GPR_idx) {
unsigned VReg;
if (isPPC64)
- VReg = RegMap->createVirtualRegister(&PPC::G8RCRegClass);
+ VReg = RegInfo.createVirtualRegister(&PPC::G8RCRegClass);
else
- VReg = RegMap->createVirtualRegister(&PPC::GPRCRegClass);
+ VReg = RegInfo.createVirtualRegister(&PPC::GPRCRegClass);
- MF.addLiveIn(GPR[GPR_idx], VReg);
+ RegInfo.addLiveIn(GPR[GPR_idx], VReg);
SDOperand Val = DAG.getCopyFromReg(Root, VReg, PtrVT);
SDOperand Store = DAG.getStore(Val.getValue(1), Val, FIN, NULL, 0);
MemOps.push_back(Store);
for (; FPR_idx != Num_FPR_Regs; ++FPR_idx) {
unsigned VReg;
- VReg = RegMap->createVirtualRegister(&PPC::F8RCRegClass);
+ VReg = RegInfo.createVirtualRegister(&PPC::F8RCRegClass);
- MF.addLiveIn(FPR[FPR_idx], VReg);
+ RegInfo.addLiveIn(FPR[FPR_idx], VReg);
SDOperand Val = DAG.getCopyFromReg(Root, VReg, MVT::f64);
SDOperand Store = DAG.getStore(Val.getValue(1), Val, FIN, NULL, 0);
MemOps.push_back(Store);
FIN = DAG.getNode(ISD::ADD, PtrOff.getValueType(), FIN, PtrOff);
}
}
-
- if (!MemOps.empty())
- Root = DAG.getNode(ISD::TokenFactor, MVT::Other,&MemOps[0],MemOps.size());
}
+ if (!MemOps.empty())
+ Root = DAG.getNode(ISD::TokenFactor, MVT::Other,&MemOps[0],MemOps.size());
+
ArgValues.push_back(Root);
// Return the new list of results.
(Addr << 6 >> 6) != Addr)
return 0; // Top 6 bits have to be sext of immediate.
- return DAG.getConstant((int)C->getValue() >> 2, MVT::i32).Val;
+ return DAG.getConstant((int)C->getValue() >> 2,
+ DAG.getTargetLoweringInfo().getPointerTy()).Val;
}
+/// CreateCopyOfByValArgument - Make a copy of an aggregate at address specified
+/// by "Src" to address "Dst" of size "Size". Alignment information is
+/// specified by the specific parameter attribute. The copy will be passed as
+/// a byval function parameter.
+/// Sometimes what we are copying is the end of a larger object, the part that
+/// does not fit in registers.
+static SDOperand
+CreateCopyOfByValArgument(SDOperand Src, SDOperand Dst, SDOperand Chain,
+ unsigned Flags, SelectionDAG &DAG, unsigned Size) {
+ unsigned Align = 1 <<
+ ((Flags & ISD::ParamFlags::ByValAlign) >> ISD::ParamFlags::ByValAlignOffs);
+ SDOperand AlignNode = DAG.getConstant(Align, MVT::i32);
+ SDOperand SizeNode = DAG.getConstant(Size, MVT::i32);
+ SDOperand AlwaysInline = DAG.getConstant(0, MVT::i32);
+ return DAG.getMemcpy(Chain, Dst, Src, SizeNode, AlignNode, AlwaysInline);
+}
-static SDOperand LowerCALL(SDOperand Op, SelectionDAG &DAG,
- const PPCSubtarget &Subtarget) {
+SDOperand PPCTargetLowering::LowerCALL(SDOperand Op, SelectionDAG &DAG,
+ const PPCSubtarget &Subtarget) {
SDOperand Chain = Op.getOperand(0);
bool isVarArg = cast<ConstantSDNode>(Op.getOperand(2))->getValue() != 0;
SDOperand Callee = Op.getOperand(4);
// Add up all the space actually used.
for (unsigned i = 0; i != NumOps; ++i) {
+ unsigned Flags = cast<ConstantSDNode>(Op.getOperand(5+2*i+1))->getValue();
unsigned ArgSize =MVT::getSizeInBits(Op.getOperand(5+2*i).getValueType())/8;
- ArgSize = std::max(ArgSize, PtrByteSize);
+ if (Flags & ISD::ParamFlags::ByVal)
+ ArgSize = (Flags & ISD::ParamFlags::ByValSize) >>
+ ISD::ParamFlags::ByValSizeOffs;
+ ArgSize = ((ArgSize + PtrByteSize - 1)/PtrByteSize) * PtrByteSize;
NumBytes += ArgSize;
}
// These operations are automatically eliminated by the prolog/epilog pass
Chain = DAG.getCALLSEQ_START(Chain,
DAG.getConstant(NumBytes, PtrVT));
+ SDOperand CallSeqStart = Chain;
// Set up a copy of the stack pointer for use loading and storing any
// arguments that may not fit in the registers available for argument
// On PPC64, promote integers to 64-bit values.
if (isPPC64 && Arg.getValueType() == MVT::i32) {
unsigned ExtOp = (Flags & 1) ? ISD::SIGN_EXTEND : ISD::ZERO_EXTEND;
-
Arg = DAG.getNode(ExtOp, MVT::i64, Arg);
}
-
+
+ // FIXME Elf untested, what are alignment rules?
+ // FIXME memcpy is used way more than necessary. Correctness first.
+ if (Flags & ISD::ParamFlags::ByVal) {
+ unsigned Size = (Flags & ISD::ParamFlags::ByValSize) >>
+ ISD::ParamFlags::ByValSizeOffs;
+ if (isELF32_ABI && Expand) GPR_idx += (GPR_idx % 2);
+ if (Size==1 || Size==2) {
+ // Very small objects are passed right-justified.
+ // Everything else is passed left-justified.
+ MVT::ValueType VT = (Size==1) ? MVT::i8 : MVT::i16;
+ if (GPR_idx != NumGPRs) {
+ SDOperand Load = DAG.getExtLoad(ISD::EXTLOAD, PtrVT, Chain, Arg,
+ NULL, 0, VT);
+ MemOpChains.push_back(Load.getValue(1));
+ RegsToPass.push_back(std::make_pair(GPR[GPR_idx++], Load));
+ if (isMachoABI)
+ ArgOffset += PtrByteSize;
+ } else {
+ SDOperand Const = DAG.getConstant(4 - Size, PtrOff.getValueType());
+ SDOperand AddPtr = DAG.getNode(ISD::ADD, PtrVT, PtrOff, Const);
+ SDOperand MemcpyCall = CreateCopyOfByValArgument(Arg, AddPtr,
+ CallSeqStart.Val->getOperand(0),
+ Flags, DAG, Size);
+ // This must go outside the CALLSEQ_START..END.
+ SDOperand NewCallSeqStart = DAG.getCALLSEQ_START(MemcpyCall,
+ CallSeqStart.Val->getOperand(1));
+ DAG.ReplaceAllUsesWith(CallSeqStart.Val, NewCallSeqStart.Val);
+ Chain = CallSeqStart = NewCallSeqStart;
+ ArgOffset += PtrByteSize;
+ }
+ continue;
+ }
+ for (unsigned j=0; j<Size; j+=PtrByteSize) {
+ SDOperand Const = DAG.getConstant(j, PtrOff.getValueType());
+ SDOperand AddArg = DAG.getNode(ISD::ADD, PtrVT, Arg, Const);
+ if (GPR_idx != NumGPRs) {
+ SDOperand Load = DAG.getLoad(PtrVT, Chain, AddArg, NULL, 0);
+ MemOpChains.push_back(Load.getValue(1));
+ RegsToPass.push_back(std::make_pair(GPR[GPR_idx++], Load));
+ if (isMachoABI)
+ ArgOffset += PtrByteSize;
+ } else {
+ SDOperand AddPtr = DAG.getNode(ISD::ADD, PtrVT, PtrOff, Const);
+ SDOperand MemcpyCall = CreateCopyOfByValArgument(AddArg, AddPtr,
+ CallSeqStart.Val->getOperand(0),
+ Flags, DAG, Size - j);
+ // This must go outside the CALLSEQ_START..END.
+ SDOperand NewCallSeqStart = DAG.getCALLSEQ_START(MemcpyCall,
+ CallSeqStart.Val->getOperand(1));
+ DAG.ReplaceAllUsesWith(CallSeqStart.Val, NewCallSeqStart.Val);
+ Chain = CallSeqStart = NewCallSeqStart;
+ ArgOffset += ((Size - j + 3)/4)*4;
+ break;
+ }
+ }
+ continue;
+ }
+
switch (Arg.getValueType()) {
default: assert(0 && "Unexpected ValueType for argument!");
case MVT::i32:
Chain = DAG.getNode(CallOpc, NodeTys, &Ops[0], Ops.size());
InFlag = Chain.getValue(1);
+ Chain = DAG.getCALLSEQ_END(Chain,
+ DAG.getConstant(NumBytes, PtrVT),
+ DAG.getConstant(0, PtrVT),
+ InFlag);
+ if (Op.Val->getValueType(0) != MVT::Other)
+ InFlag = Chain.getValue(1);
+
SDOperand ResultVals[3];
unsigned NumResults = 0;
NodeTys.clear();
NodeTys.push_back(MVT::i32);
break;
case MVT::i64:
- Chain = DAG.getCopyFromReg(Chain, PPC::X3, MVT::i64, InFlag).getValue(1);
- ResultVals[0] = Chain.getValue(0);
- NumResults = 1;
+ if (Op.Val->getValueType(1) == MVT::i64) {
+ Chain = DAG.getCopyFromReg(Chain, PPC::X3, MVT::i64, InFlag).getValue(1);
+ ResultVals[0] = Chain.getValue(0);
+ Chain = DAG.getCopyFromReg(Chain, PPC::X4, MVT::i64,
+ Chain.getValue(2)).getValue(1);
+ ResultVals[1] = Chain.getValue(0);
+ NumResults = 2;
+ NodeTys.push_back(MVT::i64);
+ } else {
+ Chain = DAG.getCopyFromReg(Chain, PPC::X3, MVT::i64, InFlag).getValue(1);
+ ResultVals[0] = Chain.getValue(0);
+ NumResults = 1;
+ }
NodeTys.push_back(MVT::i64);
break;
- case MVT::f32:
case MVT::f64:
+ if (Op.Val->getValueType(1) == MVT::f64) {
+ Chain = DAG.getCopyFromReg(Chain, PPC::F1, MVT::f64, InFlag).getValue(1);
+ ResultVals[0] = Chain.getValue(0);
+ Chain = DAG.getCopyFromReg(Chain, PPC::F2, MVT::f64,
+ Chain.getValue(2)).getValue(1);
+ ResultVals[1] = Chain.getValue(0);
+ NumResults = 2;
+ NodeTys.push_back(MVT::f64);
+ NodeTys.push_back(MVT::f64);
+ break;
+ }
+ // else fall through
+ case MVT::f32:
Chain = DAG.getCopyFromReg(Chain, PPC::F1, Op.Val->getValueType(0),
InFlag).getValue(1);
ResultVals[0] = Chain.getValue(0);
break;
}
- Chain = DAG.getNode(ISD::CALLSEQ_END, MVT::Other, Chain,
- DAG.getConstant(NumBytes, PtrVT));
NodeTys.push_back(MVT::Other);
// If the function returns void, just return the chain.
return Res.getValue(Op.ResNo);
}
-static SDOperand LowerRET(SDOperand Op, SelectionDAG &DAG, TargetMachine &TM) {
+SDOperand PPCTargetLowering::LowerRET(SDOperand Op, SelectionDAG &DAG,
+ TargetMachine &TM) {
SmallVector<CCValAssign, 16> RVLocs;
unsigned CC = DAG.getMachineFunction().getFunction()->getCallingConv();
bool isVarArg = DAG.getMachineFunction().getFunction()->isVarArg();
// If this is the first return lowered for this function, add the regs to the
// liveout set for the function.
- if (DAG.getMachineFunction().liveout_empty()) {
+ if (DAG.getMachineFunction().getRegInfo().liveout_empty()) {
for (unsigned i = 0; i != RVLocs.size(); ++i)
- DAG.getMachineFunction().addLiveOut(RVLocs[i].getLocReg());
+ DAG.getMachineFunction().getRegInfo().addLiveOut(RVLocs[i].getLocReg());
}
SDOperand Chain = Op.getOperand(0);
return DAG.getNode(PPCISD::RET_FLAG, MVT::Other, Chain);
}
-static SDOperand LowerSTACKRESTORE(SDOperand Op, SelectionDAG &DAG,
+SDOperand PPCTargetLowering::LowerSTACKRESTORE(SDOperand Op, SelectionDAG &DAG,
const PPCSubtarget &Subtarget) {
// When we pop the dynamic allocation we need to restore the SP link.
return DAG.getStore(Chain, LoadLinkSP, StackPtr, NULL, 0);
}
-static SDOperand LowerDYNAMIC_STACKALLOC(SDOperand Op, SelectionDAG &DAG,
+SDOperand PPCTargetLowering::LowerDYNAMIC_STACKALLOC(SDOperand Op,
+ SelectionDAG &DAG,
const PPCSubtarget &Subtarget) {
MachineFunction &MF = DAG.getMachineFunction();
bool IsPPC64 = Subtarget.isPPC64();
/// LowerSELECT_CC - Lower floating point select_cc's into fsel instruction when
/// possible.
-static SDOperand LowerSELECT_CC(SDOperand Op, SelectionDAG &DAG) {
+SDOperand PPCTargetLowering::LowerSELECT_CC(SDOperand Op, SelectionDAG &DAG) {
// Not FP? Not a fsel.
if (!MVT::isFloatingPoint(Op.getOperand(0).getValueType()) ||
!MVT::isFloatingPoint(Op.getOperand(2).getValueType()))
DAG.getNode(ISD::FNEG, MVT::f64, LHS), TV, FV);
}
- SDOperand Cmp;
+ SDOperand Cmp;
switch (CC) {
default: break; // SETUO etc aren't handled by fsel.
case ISD::SETULT:
return SDOperand();
}
-static SDOperand LowerFP_TO_SINT(SDOperand Op, SelectionDAG &DAG) {
+// FIXME: Split this code up when LegalizeDAGTypes lands.
+SDOperand PPCTargetLowering::LowerFP_TO_SINT(SDOperand Op, SelectionDAG &DAG) {
assert(MVT::isFloatingPoint(Op.getOperand(0).getValueType()));
SDOperand Src = Op.getOperand(0);
if (Src.getValueType() == MVT::f32)
}
// Convert the FP value to an int value through memory.
- SDOperand Bits = DAG.getNode(ISD::BIT_CONVERT, MVT::i64, Tmp);
+ SDOperand FIPtr = DAG.CreateStackTemporary(MVT::f64);
+
+ // Emit a store to the stack slot.
+ SDOperand Chain = DAG.getStore(DAG.getEntryNode(), Tmp, FIPtr, NULL, 0);
+
+ // Result is a load from the stack slot. If loading 4 bytes, make sure to
+ // add in a bias.
if (Op.getValueType() == MVT::i32)
- Bits = DAG.getNode(ISD::TRUNCATE, MVT::i32, Bits);
- return Bits;
+ FIPtr = DAG.getNode(ISD::ADD, FIPtr.getValueType(), FIPtr,
+ DAG.getConstant(4, FIPtr.getValueType()));
+ return DAG.getLoad(Op.getValueType(), Chain, FIPtr, NULL, 0);
}
-static SDOperand LowerSINT_TO_FP(SDOperand Op, SelectionDAG &DAG) {
+SDOperand PPCTargetLowering::LowerFP_ROUND_INREG(SDOperand Op,
+ SelectionDAG &DAG) {
+ assert(Op.getValueType() == MVT::ppcf128);
+ SDNode *Node = Op.Val;
+ assert(Node->getOperand(0).getValueType() == MVT::ppcf128);
+ assert(Node->getOperand(0).Val->getOpcode() == ISD::BUILD_PAIR);
+ SDOperand Lo = Node->getOperand(0).Val->getOperand(0);
+ SDOperand Hi = Node->getOperand(0).Val->getOperand(1);
+
+ // This sequence changes FPSCR to do round-to-zero, adds the two halves
+ // of the long double, and puts FPSCR back the way it was. We do not
+ // actually model FPSCR.
+ std::vector<MVT::ValueType> NodeTys;
+ SDOperand Ops[4], Result, MFFSreg, InFlag, FPreg;
+
+ NodeTys.push_back(MVT::f64); // Return register
+ NodeTys.push_back(MVT::Flag); // Returns a flag for later insns
+ Result = DAG.getNode(PPCISD::MFFS, NodeTys, &InFlag, 0);
+ MFFSreg = Result.getValue(0);
+ InFlag = Result.getValue(1);
+
+ NodeTys.clear();
+ NodeTys.push_back(MVT::Flag); // Returns a flag
+ Ops[0] = DAG.getConstant(31, MVT::i32);
+ Ops[1] = InFlag;
+ Result = DAG.getNode(PPCISD::MTFSB1, NodeTys, Ops, 2);
+ InFlag = Result.getValue(0);
+
+ NodeTys.clear();
+ NodeTys.push_back(MVT::Flag); // Returns a flag
+ Ops[0] = DAG.getConstant(30, MVT::i32);
+ Ops[1] = InFlag;
+ Result = DAG.getNode(PPCISD::MTFSB0, NodeTys, Ops, 2);
+ InFlag = Result.getValue(0);
+
+ NodeTys.clear();
+ NodeTys.push_back(MVT::f64); // result of add
+ NodeTys.push_back(MVT::Flag); // Returns a flag
+ Ops[0] = Lo;
+ Ops[1] = Hi;
+ Ops[2] = InFlag;
+ Result = DAG.getNode(PPCISD::FADDRTZ, NodeTys, Ops, 3);
+ FPreg = Result.getValue(0);
+ InFlag = Result.getValue(1);
+
+ NodeTys.clear();
+ NodeTys.push_back(MVT::f64);
+ Ops[0] = DAG.getConstant(1, MVT::i32);
+ Ops[1] = MFFSreg;
+ Ops[2] = FPreg;
+ Ops[3] = InFlag;
+ Result = DAG.getNode(PPCISD::MTFSF, NodeTys, Ops, 4);
+ FPreg = Result.getValue(0);
+
+ // We know the low half is about to be thrown away, so just use something
+ // convenient.
+ return DAG.getNode(ISD::BUILD_PAIR, Lo.getValueType(), FPreg, FPreg);
+}
+
+SDOperand PPCTargetLowering::LowerSINT_TO_FP(SDOperand Op, SelectionDAG &DAG) {
if (Op.getOperand(0).getValueType() == MVT::i64) {
SDOperand Bits = DAG.getNode(ISD::BIT_CONVERT, MVT::f64, Op.getOperand(0));
SDOperand FP = DAG.getNode(PPCISD::FCFID, MVT::f64, Bits);
if (Op.getValueType() == MVT::f32)
- FP = DAG.getNode(ISD::FP_ROUND, MVT::f32, FP);
+ FP = DAG.getNode(ISD::FP_ROUND, MVT::f32, FP, DAG.getIntPtrConstant(0));
return FP;
}
Op.getOperand(0));
// STD the extended value into the stack slot.
+ MemOperand MO(PseudoSourceValue::getFixedStack(),
+ MemOperand::MOStore, FrameIdx, 8, 8);
SDOperand Store = DAG.getNode(PPCISD::STD_32, MVT::Other,
DAG.getEntryNode(), Ext64, FIdx,
- DAG.getSrcValue(NULL));
+ DAG.getMemOperand(MO));
// Load the value as a double.
SDOperand Ld = DAG.getLoad(MVT::f64, Store, FIdx, NULL, 0);
// FCFID it and return it.
SDOperand FP = DAG.getNode(PPCISD::FCFID, MVT::f64, Ld);
if (Op.getValueType() == MVT::f32)
- FP = DAG.getNode(ISD::FP_ROUND, MVT::f32, FP);
+ FP = DAG.getNode(ISD::FP_ROUND, MVT::f32, FP, DAG.getIntPtrConstant(0));
return FP;
}
-static SDOperand LowerSHL_PARTS(SDOperand Op, SelectionDAG &DAG) {
- assert(Op.getNumOperands() == 3 && Op.getValueType() == MVT::i32 &&
- Op.getOperand(1).getValueType() == MVT::i32 && "Unexpected SHL!");
+SDOperand PPCTargetLowering::LowerFLT_ROUNDS_(SDOperand Op, SelectionDAG &DAG) {
+ /*
+ The rounding mode is in bits 30:31 of FPSR, and has the following
+ settings:
+ 00 Round to nearest
+ 01 Round to 0
+ 10 Round to +inf
+ 11 Round to -inf
+
+ FLT_ROUNDS, on the other hand, expects the following:
+ -1 Undefined
+ 0 Round to 0
+ 1 Round to nearest
+ 2 Round to +inf
+ 3 Round to -inf
+
+ To perform the conversion, we do:
+ ((FPSCR & 0x3) ^ ((~FPSCR & 0x3) >> 1))
+ */
+
+ MachineFunction &MF = DAG.getMachineFunction();
+ MVT::ValueType VT = Op.getValueType();
+ MVT::ValueType PtrVT = DAG.getTargetLoweringInfo().getPointerTy();
+ std::vector<MVT::ValueType> NodeTys;
+ SDOperand MFFSreg, InFlag;
+
+ // Save FP Control Word to register
+ NodeTys.push_back(MVT::f64); // return register
+ NodeTys.push_back(MVT::Flag); // unused in this context
+ SDOperand Chain = DAG.getNode(PPCISD::MFFS, NodeTys, &InFlag, 0);
+
+ // Save FP register to stack slot
+ int SSFI = MF.getFrameInfo()->CreateStackObject(8, 8);
+ SDOperand StackSlot = DAG.getFrameIndex(SSFI, PtrVT);
+ SDOperand Store = DAG.getStore(DAG.getEntryNode(), Chain,
+ StackSlot, NULL, 0);
+
+ // Load FP Control Word from low 32 bits of stack slot.
+ SDOperand Four = DAG.getConstant(4, PtrVT);
+ SDOperand Addr = DAG.getNode(ISD::ADD, PtrVT, StackSlot, Four);
+ SDOperand CWD = DAG.getLoad(MVT::i32, Store, Addr, NULL, 0);
+
+ // Transform as necessary
+ SDOperand CWD1 =
+ DAG.getNode(ISD::AND, MVT::i32,
+ CWD, DAG.getConstant(3, MVT::i32));
+ SDOperand CWD2 =
+ DAG.getNode(ISD::SRL, MVT::i32,
+ DAG.getNode(ISD::AND, MVT::i32,
+ DAG.getNode(ISD::XOR, MVT::i32,
+ CWD, DAG.getConstant(3, MVT::i32)),
+ DAG.getConstant(3, MVT::i32)),
+ DAG.getConstant(1, MVT::i8));
+
+ SDOperand RetVal =
+ DAG.getNode(ISD::XOR, MVT::i32, CWD1, CWD2);
+
+ return DAG.getNode((MVT::getSizeInBits(VT) < 16 ?
+ ISD::TRUNCATE : ISD::ZERO_EXTEND), VT, RetVal);
+}
+
+SDOperand PPCTargetLowering::LowerSHL_PARTS(SDOperand Op, SelectionDAG &DAG) {
+ MVT::ValueType VT = Op.getValueType();
+ unsigned BitWidth = MVT::getSizeInBits(VT);
+ assert(Op.getNumOperands() == 3 &&
+ VT == Op.getOperand(1).getValueType() &&
+ "Unexpected SHL!");
// Expand into a bunch of logical ops. Note that these ops
// depend on the PPC behavior for oversized shift amounts.
SDOperand Lo = Op.getOperand(0);
SDOperand Hi = Op.getOperand(1);
SDOperand Amt = Op.getOperand(2);
-
- SDOperand Tmp1 = DAG.getNode(ISD::SUB, MVT::i32,
- DAG.getConstant(32, MVT::i32), Amt);
- SDOperand Tmp2 = DAG.getNode(PPCISD::SHL, MVT::i32, Hi, Amt);
- SDOperand Tmp3 = DAG.getNode(PPCISD::SRL, MVT::i32, Lo, Tmp1);
- SDOperand Tmp4 = DAG.getNode(ISD::OR , MVT::i32, Tmp2, Tmp3);
- SDOperand Tmp5 = DAG.getNode(ISD::ADD, MVT::i32, Amt,
- DAG.getConstant(-32U, MVT::i32));
- SDOperand Tmp6 = DAG.getNode(PPCISD::SHL, MVT::i32, Lo, Tmp5);
- SDOperand OutHi = DAG.getNode(ISD::OR, MVT::i32, Tmp4, Tmp6);
- SDOperand OutLo = DAG.getNode(PPCISD::SHL, MVT::i32, Lo, Amt);
+ MVT::ValueType AmtVT = Amt.getValueType();
+
+ SDOperand Tmp1 = DAG.getNode(ISD::SUB, AmtVT,
+ DAG.getConstant(BitWidth, AmtVT), Amt);
+ SDOperand Tmp2 = DAG.getNode(PPCISD::SHL, VT, Hi, Amt);
+ SDOperand Tmp3 = DAG.getNode(PPCISD::SRL, VT, Lo, Tmp1);
+ SDOperand Tmp4 = DAG.getNode(ISD::OR , VT, Tmp2, Tmp3);
+ SDOperand Tmp5 = DAG.getNode(ISD::ADD, AmtVT, Amt,
+ DAG.getConstant(-BitWidth, AmtVT));
+ SDOperand Tmp6 = DAG.getNode(PPCISD::SHL, VT, Lo, Tmp5);
+ SDOperand OutHi = DAG.getNode(ISD::OR, VT, Tmp4, Tmp6);
+ SDOperand OutLo = DAG.getNode(PPCISD::SHL, VT, Lo, Amt);
SDOperand OutOps[] = { OutLo, OutHi };
- return DAG.getNode(ISD::MERGE_VALUES, DAG.getVTList(MVT::i32, MVT::i32),
+ return DAG.getNode(ISD::MERGE_VALUES, DAG.getVTList(VT, VT),
OutOps, 2);
}
-static SDOperand LowerSRL_PARTS(SDOperand Op, SelectionDAG &DAG) {
- assert(Op.getNumOperands() == 3 && Op.getValueType() == MVT::i32 &&
- Op.getOperand(1).getValueType() == MVT::i32 && "Unexpected SRL!");
+SDOperand PPCTargetLowering::LowerSRL_PARTS(SDOperand Op, SelectionDAG &DAG) {
+ MVT::ValueType VT = Op.getValueType();
+ unsigned BitWidth = MVT::getSizeInBits(VT);
+ assert(Op.getNumOperands() == 3 &&
+ VT == Op.getOperand(1).getValueType() &&
+ "Unexpected SRL!");
- // Otherwise, expand into a bunch of logical ops. Note that these ops
+ // Expand into a bunch of logical ops. Note that these ops
// depend on the PPC behavior for oversized shift amounts.
SDOperand Lo = Op.getOperand(0);
SDOperand Hi = Op.getOperand(1);
SDOperand Amt = Op.getOperand(2);
-
- SDOperand Tmp1 = DAG.getNode(ISD::SUB, MVT::i32,
- DAG.getConstant(32, MVT::i32), Amt);
- SDOperand Tmp2 = DAG.getNode(PPCISD::SRL, MVT::i32, Lo, Amt);
- SDOperand Tmp3 = DAG.getNode(PPCISD::SHL, MVT::i32, Hi, Tmp1);
- SDOperand Tmp4 = DAG.getNode(ISD::OR , MVT::i32, Tmp2, Tmp3);
- SDOperand Tmp5 = DAG.getNode(ISD::ADD, MVT::i32, Amt,
- DAG.getConstant(-32U, MVT::i32));
- SDOperand Tmp6 = DAG.getNode(PPCISD::SRL, MVT::i32, Hi, Tmp5);
- SDOperand OutLo = DAG.getNode(ISD::OR, MVT::i32, Tmp4, Tmp6);
- SDOperand OutHi = DAG.getNode(PPCISD::SRL, MVT::i32, Hi, Amt);
+ MVT::ValueType AmtVT = Amt.getValueType();
+
+ SDOperand Tmp1 = DAG.getNode(ISD::SUB, AmtVT,
+ DAG.getConstant(BitWidth, AmtVT), Amt);
+ SDOperand Tmp2 = DAG.getNode(PPCISD::SRL, VT, Lo, Amt);
+ SDOperand Tmp3 = DAG.getNode(PPCISD::SHL, VT, Hi, Tmp1);
+ SDOperand Tmp4 = DAG.getNode(ISD::OR , VT, Tmp2, Tmp3);
+ SDOperand Tmp5 = DAG.getNode(ISD::ADD, AmtVT, Amt,
+ DAG.getConstant(-BitWidth, AmtVT));
+ SDOperand Tmp6 = DAG.getNode(PPCISD::SRL, VT, Hi, Tmp5);
+ SDOperand OutLo = DAG.getNode(ISD::OR, VT, Tmp4, Tmp6);
+ SDOperand OutHi = DAG.getNode(PPCISD::SRL, VT, Hi, Amt);
SDOperand OutOps[] = { OutLo, OutHi };
- return DAG.getNode(ISD::MERGE_VALUES, DAG.getVTList(MVT::i32, MVT::i32),
+ return DAG.getNode(ISD::MERGE_VALUES, DAG.getVTList(VT, VT),
OutOps, 2);
}
-static SDOperand LowerSRA_PARTS(SDOperand Op, SelectionDAG &DAG) {
- assert(Op.getNumOperands() == 3 && Op.getValueType() == MVT::i32 &&
- Op.getOperand(1).getValueType() == MVT::i32 && "Unexpected SRA!");
+SDOperand PPCTargetLowering::LowerSRA_PARTS(SDOperand Op, SelectionDAG &DAG) {
+ MVT::ValueType VT = Op.getValueType();
+ unsigned BitWidth = MVT::getSizeInBits(VT);
+ assert(Op.getNumOperands() == 3 &&
+ VT == Op.getOperand(1).getValueType() &&
+ "Unexpected SRA!");
- // Otherwise, expand into a bunch of logical ops, followed by a select_cc.
+ // Expand into a bunch of logical ops, followed by a select_cc.
SDOperand Lo = Op.getOperand(0);
SDOperand Hi = Op.getOperand(1);
SDOperand Amt = Op.getOperand(2);
-
- SDOperand Tmp1 = DAG.getNode(ISD::SUB, MVT::i32,
- DAG.getConstant(32, MVT::i32), Amt);
- SDOperand Tmp2 = DAG.getNode(PPCISD::SRL, MVT::i32, Lo, Amt);
- SDOperand Tmp3 = DAG.getNode(PPCISD::SHL, MVT::i32, Hi, Tmp1);
- SDOperand Tmp4 = DAG.getNode(ISD::OR , MVT::i32, Tmp2, Tmp3);
- SDOperand Tmp5 = DAG.getNode(ISD::ADD, MVT::i32, Amt,
- DAG.getConstant(-32U, MVT::i32));
- SDOperand Tmp6 = DAG.getNode(PPCISD::SRA, MVT::i32, Hi, Tmp5);
- SDOperand OutHi = DAG.getNode(PPCISD::SRA, MVT::i32, Hi, Amt);
- SDOperand OutLo = DAG.getSelectCC(Tmp5, DAG.getConstant(0, MVT::i32),
+ MVT::ValueType AmtVT = Amt.getValueType();
+
+ SDOperand Tmp1 = DAG.getNode(ISD::SUB, AmtVT,
+ DAG.getConstant(BitWidth, AmtVT), Amt);
+ SDOperand Tmp2 = DAG.getNode(PPCISD::SRL, VT, Lo, Amt);
+ SDOperand Tmp3 = DAG.getNode(PPCISD::SHL, VT, Hi, Tmp1);
+ SDOperand Tmp4 = DAG.getNode(ISD::OR , VT, Tmp2, Tmp3);
+ SDOperand Tmp5 = DAG.getNode(ISD::ADD, AmtVT, Amt,
+ DAG.getConstant(-BitWidth, AmtVT));
+ SDOperand Tmp6 = DAG.getNode(PPCISD::SRA, VT, Hi, Tmp5);
+ SDOperand OutHi = DAG.getNode(PPCISD::SRA, VT, Hi, Amt);
+ SDOperand OutLo = DAG.getSelectCC(Tmp5, DAG.getConstant(0, AmtVT),
Tmp4, Tmp6, ISD::SETLE);
SDOperand OutOps[] = { OutLo, OutHi };
- return DAG.getNode(ISD::MERGE_VALUES, DAG.getVTList(MVT::i32, MVT::i32),
+ return DAG.getNode(ISD::MERGE_VALUES, DAG.getVTList(VT, VT),
OutOps, 2);
}
// selects to a single instruction, return Op. Otherwise, if we can codegen
// this case more efficiently than a constant pool load, lower it to the
// sequence of ops that should be used.
-static SDOperand LowerBUILD_VECTOR(SDOperand Op, SelectionDAG &DAG) {
+SDOperand PPCTargetLowering::LowerBUILD_VECTOR(SDOperand Op,
+ SelectionDAG &DAG) {
// If this is a vector of constants or undefs, get the bits. A bit in
// UndefBits is set if the corresponding element of the vector is an
// ISD::UNDEF value. For undefs, the corresponding VectorBits values are
if (SextVal >= 0 && SextVal <= 31) {
SDOperand LHS = BuildSplatI(SextVal-16, SplatSize, MVT::Other, DAG);
SDOperand RHS = BuildSplatI(-16, SplatSize, MVT::Other, DAG);
- LHS = DAG.getNode(ISD::SUB, Op.getValueType(), LHS, RHS);
+ LHS = DAG.getNode(ISD::SUB, LHS.getValueType(), LHS, RHS);
return DAG.getNode(ISD::BIT_CONVERT, Op.getValueType(), LHS);
}
// Odd, in range [-31,-17]: (vsplti C)+(vsplti -16).
if (SextVal >= -31 && SextVal <= 0) {
SDOperand LHS = BuildSplatI(SextVal+16, SplatSize, MVT::Other, DAG);
SDOperand RHS = BuildSplatI(-16, SplatSize, MVT::Other, DAG);
- LHS = DAG.getNode(ISD::ADD, Op.getValueType(), LHS, RHS);
+ LHS = DAG.getNode(ISD::ADD, LHS.getValueType(), LHS, RHS);
return DAG.getNode(ISD::BIT_CONVERT, Op.getValueType(), LHS);
}
}
/// is a shuffle we can handle in a single instruction, return it. Otherwise,
/// return the code it can be lowered into. Worst case, it can always be
/// lowered into a vperm.
-static SDOperand LowerVECTOR_SHUFFLE(SDOperand Op, SelectionDAG &DAG) {
+SDOperand PPCTargetLowering::LowerVECTOR_SHUFFLE(SDOperand Op,
+ SelectionDAG &DAG) {
SDOperand V1 = Op.getOperand(0);
SDOperand V2 = Op.getOperand(1);
SDOperand PermMask = Op.getOperand(2);
/// LowerINTRINSIC_WO_CHAIN - If this is an intrinsic that we want to custom
/// lower, do it, otherwise return null.
-static SDOperand LowerINTRINSIC_WO_CHAIN(SDOperand Op, SelectionDAG &DAG) {
+SDOperand PPCTargetLowering::LowerINTRINSIC_WO_CHAIN(SDOperand Op,
+ SelectionDAG &DAG) {
// If this is a lowered altivec predicate compare, CompareOpc is set to the
// opcode number of the comparison.
int CompareOpc;
return Flags;
}
-static SDOperand LowerSCALAR_TO_VECTOR(SDOperand Op, SelectionDAG &DAG) {
+SDOperand PPCTargetLowering::LowerSCALAR_TO_VECTOR(SDOperand Op,
+ SelectionDAG &DAG) {
// Create a stack slot that is 16-byte aligned.
MachineFrameInfo *FrameInfo = DAG.getMachineFunction().getFrameInfo();
int FrameIdx = FrameInfo->CreateStackObject(16, 16);
return DAG.getLoad(Op.getValueType(), Store, FIdx, NULL, 0);
}
-static SDOperand LowerMUL(SDOperand Op, SelectionDAG &DAG) {
+SDOperand PPCTargetLowering::LowerMUL(SDOperand Op, SelectionDAG &DAG) {
if (Op.getValueType() == MVT::v4i32) {
SDOperand LHS = Op.getOperand(0), RHS = Op.getOperand(1);
case ISD::SELECT_CC: return LowerSELECT_CC(Op, DAG);
case ISD::FP_TO_SINT: return LowerFP_TO_SINT(Op, DAG);
case ISD::SINT_TO_FP: return LowerSINT_TO_FP(Op, DAG);
+ case ISD::FP_ROUND_INREG: return LowerFP_ROUND_INREG(Op, DAG);
+ case ISD::FLT_ROUNDS_: return LowerFLT_ROUNDS_(Op, DAG);
// Lower 64-bit shifts.
case ISD::SHL_PARTS: return LowerSHL_PARTS(Op, DAG);
case ISD::SCALAR_TO_VECTOR: return LowerSCALAR_TO_VECTOR(Op, DAG);
case ISD::MUL: return LowerMUL(Op, DAG);
- // Frame & Return address. Currently unimplemented
- case ISD::RETURNADDR: break;
+ // Frame & Return address.
+ case ISD::RETURNADDR: return LowerRETURNADDR(Op, DAG);
case ISD::FRAMEADDR: return LowerFRAMEADDR(Op, DAG);
}
return SDOperand();
}
+SDNode *PPCTargetLowering::ExpandOperationResult(SDNode *N, SelectionDAG &DAG) {
+ switch (N->getOpcode()) {
+ default: assert(0 && "Wasn't expecting to be able to lower this!");
+ case ISD::FP_TO_SINT: return LowerFP_TO_SINT(SDOperand(N, 0), DAG).Val;
+ }
+}
+
+
//===----------------------------------------------------------------------===//
// Other Lowering Code
//===----------------------------------------------------------------------===//
MachineBasicBlock *
-PPCTargetLowering::InsertAtEndOfBasicBlock(MachineInstr *MI,
- MachineBasicBlock *BB) {
+PPCTargetLowering::EmitInstrWithCustomInserter(MachineInstr *MI,
+ MachineBasicBlock *BB) {
const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
assert((MI->getOpcode() == PPC::SELECT_CC_I4 ||
MI->getOpcode() == PPC::SELECT_CC_I8 ||
// Turn (sint_to_fp (fp_to_sint X)) -> fctidz/fcfid without load/stores.
// We allow the src/dst to be either f32/f64, but the intermediate
// type must be i64.
- if (N->getOperand(0).getValueType() == MVT::i64) {
+ if (N->getOperand(0).getValueType() == MVT::i64 &&
+ N->getOperand(0).getOperand(0).getValueType() != MVT::ppcf128) {
SDOperand Val = N->getOperand(0).getOperand(0);
if (Val.getValueType() == MVT::f32) {
Val = DAG.getNode(ISD::FP_EXTEND, MVT::f64, Val);
Val = DAG.getNode(PPCISD::FCFID, MVT::f64, Val);
DCI.AddToWorklist(Val.Val);
if (N->getValueType(0) == MVT::f32) {
- Val = DAG.getNode(ISD::FP_ROUND, MVT::f32, Val);
+ Val = DAG.getNode(ISD::FP_ROUND, MVT::f32, Val,
+ DAG.getIntPtrConstant(0));
DCI.AddToWorklist(Val.Val);
}
return Val;
case ISD::STORE:
// Turn STORE (FP_TO_SINT F) -> STFIWX(FCTIWZ(F)).
if (TM.getSubtarget<PPCSubtarget>().hasSTFIWX() &&
+ !cast<StoreSDNode>(N)->isTruncatingStore() &&
N->getOperand(1).getOpcode() == ISD::FP_TO_SINT &&
- N->getOperand(1).getValueType() == MVT::i32) {
+ N->getOperand(1).getValueType() == MVT::i32 &&
+ N->getOperand(1).getOperand(0).getValueType() != MVT::ppcf128) {
SDOperand Val = N->getOperand(1).getOperand(0);
if (Val.getValueType() == MVT::f32) {
Val = DAG.getNode(ISD::FP_EXTEND, MVT::f64, Val);
std::vector<MVT::ValueType> VTs;
VTs.push_back(MVT::i32);
VTs.push_back(MVT::Other);
- SDOperand SV = DAG.getSrcValue(LD->getSrcValue(), LD->getSrcValueOffset());
+ SDOperand MO = DAG.getMemOperand(LD->getMemOperand());
SDOperand Ops[] = {
LD->getChain(), // Chain
LD->getBasePtr(), // Ptr
- SV, // SrcValue
+ MO, // MemOperand
DAG.getValueType(N->getValueType(0)) // VT
};
SDOperand BSLoad = DAG.getNode(PPCISD::LBRX, VTs, Ops, 4);
//===----------------------------------------------------------------------===//
void PPCTargetLowering::computeMaskedBitsForTargetNode(const SDOperand Op,
- uint64_t Mask,
- uint64_t &KnownZero,
- uint64_t &KnownOne,
+ const APInt &Mask,
+ APInt &KnownZero,
+ APInt &KnownOne,
const SelectionDAG &DAG,
unsigned Depth) const {
- KnownZero = 0;
- KnownOne = 0;
+ KnownZero = KnownOne = APInt(Mask.getBitWidth(), 0);
switch (Op.getOpcode()) {
default: break;
case PPCISD::LBRX: {
return false;
}
-SDOperand PPCTargetLowering::LowerFRAMEADDR(SDOperand Op, SelectionDAG &DAG)
-{
+SDOperand PPCTargetLowering::LowerRETURNADDR(SDOperand Op, SelectionDAG &DAG) {
+ // Depths > 0 not supported yet!
+ if (cast<ConstantSDNode>(Op.getOperand(0))->getValue() > 0)
+ return SDOperand();
+
+ MachineFunction &MF = DAG.getMachineFunction();
+ PPCFunctionInfo *FuncInfo = MF.getInfo<PPCFunctionInfo>();
+ int RAIdx = FuncInfo->getReturnAddrSaveIndex();
+ if (RAIdx == 0) {
+ bool isPPC64 = PPCSubTarget.isPPC64();
+ int Offset =
+ PPCFrameInfo::getReturnSaveOffset(isPPC64, PPCSubTarget.isMachoABI());
+
+ // Set up a frame object for the return address.
+ RAIdx = MF.getFrameInfo()->CreateFixedObject(isPPC64 ? 8 : 4, Offset);
+
+ // Remember it for next time.
+ FuncInfo->setReturnAddrSaveIndex(RAIdx);
+
+ // Make sure the function really does not optimize away the store of the RA
+ // to the stack.
+ FuncInfo->setLRStoreRequired();
+ }
+
+ // Just load the return address off the stack.
+ SDOperand RetAddrFI = DAG.getFrameIndex(RAIdx, getPointerTy());
+ return DAG.getLoad(getPointerTy(), DAG.getEntryNode(), RetAddrFI, NULL, 0);
+}
+
+SDOperand PPCTargetLowering::LowerFRAMEADDR(SDOperand Op, SelectionDAG &DAG) {
// Depths > 0 not supported yet!
if (cast<ConstantSDNode>(Op.getOperand(0))->getValue() > 0)
return SDOperand();
projects / oota-llvm.git / blobdiff