#include "llvm/Support/MathExtras.h"
#include "llvm/Target/TargetOptions.h"
#include "llvm/Support/CommandLine.h"
+#include "llvm/ADT/StringExtras.h"
using namespace llvm;
// FIXME: temporary.
setShiftAmountFlavor(Mask); // shl X, 32 == shl X, 0
setStackPointerRegisterToSaveRestore(X86StackPtr);
- if (!Subtarget->isTargetDarwin())
+ if (Subtarget->isTargetDarwin()) {
// Darwin should use _setjmp/_longjmp instead of setjmp/longjmp.
- setUseUnderscoreSetJmpLongJmp(true);
-
+ setUseUnderscoreSetJmp(false);
+ setUseUnderscoreLongJmp(false);
+ } else if (Subtarget->isTargetMingw()) {
+ // MS runtime is weird: it exports _setjmp, but longjmp!
+ setUseUnderscoreSetJmp(true);
+ setUseUnderscoreLongJmp(false);
+ } else {
+ setUseUnderscoreSetJmp(true);
+ setUseUnderscoreLongJmp(true);
+ }
+
// Add legal addressing mode scale values.
addLegalAddressScale(8);
addLegalAddressScale(4);
addLegalAddressScale(9);
addLegalAddressScale(5);
addLegalAddressScale(3);
-
+
// Set up the register classes.
addRegisterClass(MVT::i8, X86::GR8RegisterClass);
addRegisterClass(MVT::i16, X86::GR16RegisterClass);
setOperationAction(ISD::FP_TO_UINT , MVT::i32 , Promote);
}
- setOperationAction(ISD::BIT_CONVERT , MVT::f32 , Expand);
- setOperationAction(ISD::BIT_CONVERT , MVT::i32 , Expand);
+ // TODO: when we have SSE, these could be more efficient, by using movd/movq.
+ if (!X86ScalarSSE) {
+ setOperationAction(ISD::BIT_CONVERT , MVT::f32 , Expand);
+ setOperationAction(ISD::BIT_CONVERT , MVT::i32 , Expand);
+ }
setOperationAction(ISD::BR_JT , MVT::Other, Expand);
setOperationAction(ISD::BRCOND , MVT::Other, Custom);
// FIXME - use subtarget debug flags
if (!Subtarget->isTargetDarwin() &&
!Subtarget->isTargetELF() &&
- !Subtarget->isTargetCygwin())
- setOperationAction(ISD::DEBUG_LABEL, MVT::Other, Expand);
+ !Subtarget->isTargetCygMing())
+ setOperationAction(ISD::LABEL, MVT::Other, Expand);
// VASTART needs to be custom lowered to use the VarArgsFrameIndex
setOperationAction(ISD::VASTART , MVT::Other, Custom);
-
+
// Use the default implementation.
setOperationAction(ISD::VAARG , MVT::Other, Expand);
setOperationAction(ISD::VACOPY , MVT::Other, Expand);
setOperationAction(ISD::VAEND , MVT::Other, Expand);
- setOperationAction(ISD::STACKSAVE, MVT::Other, Expand);
+ setOperationAction(ISD::STACKSAVE, MVT::Other, Expand);
setOperationAction(ISD::STACKRESTORE, MVT::Other, Expand);
if (Subtarget->is64Bit())
setOperationAction(ISD::DYNAMIC_STACKALLOC, MVT::i64, Expand);
setOperationAction(ISD::DYNAMIC_STACKALLOC, MVT::i32 , Expand);
- setOperationAction(ISD::FCOPYSIGN, MVT::f64, Expand);
- setOperationAction(ISD::FCOPYSIGN, MVT::f32, Expand);
-
if (X86ScalarSSE) {
// Set up the FP register classes.
addRegisterClass(MVT::f32, X86::FR32RegisterClass);
setOperationAction(ISD::FNEG , MVT::f64, Custom);
setOperationAction(ISD::FNEG , MVT::f32, Custom);
+ // Use ANDPD and ORPD to simulate FCOPYSIGN.
+ setOperationAction(ISD::FCOPYSIGN, MVT::f64, Custom);
+ setOperationAction(ISD::FCOPYSIGN, MVT::f32, Custom);
+
// We don't support sin/cos/fmod
setOperationAction(ISD::FSIN , MVT::f64, Expand);
setOperationAction(ISD::FCOS , MVT::f64, Expand);
} else {
// Set up the FP register classes.
addRegisterClass(MVT::f64, X86::RFPRegisterClass);
-
- setOperationAction(ISD::UNDEF, MVT::f64, Expand);
-
+
+ setOperationAction(ISD::UNDEF, MVT::f64, Expand);
+ setOperationAction(ISD::FCOPYSIGN, MVT::f64, Expand);
+ setOperationAction(ISD::FCOPYSIGN, MVT::f32, Expand);
+
if (!UnsafeFPMath) {
setOperationAction(ISD::FSIN , MVT::f64 , Expand);
setOperationAction(ISD::FCOS , MVT::f64 , Expand);
setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v2f64, Custom);
setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v2i64, Custom);
- // Promote v16i8, v8i16, v4i32 load, select, and, or, xor to v2i64.
+ // Promote v16i8, v8i16, v4i32 load, select, and, or, xor to v2i64.
for (unsigned VT = (unsigned)MVT::v16i8; VT != (unsigned)MVT::v2i64; VT++) {
setOperationAction(ISD::AND, (MVT::ValueType)VT, Promote);
AddPromotedToType (ISD::AND, (MVT::ValueType)VT, MVT::v2i64);
}
//===----------------------------------------------------------------------===//
-// C Calling Convention implementation
+// C & StdCall Calling Convention implementation
//===----------------------------------------------------------------------===//
+// StdCall calling convention seems to be standard for many Windows' API
+// routines and around. It differs from C calling convention just a little:
+// callee should clean up the stack, not caller. Symbols should be also
+// decorated in some fancy way :) It doesn't support any vector arguments.
/// AddLiveIn - This helper function adds the specified physical register to the
/// MachineFunction as a live in value. It also creates a corresponding virtual
/// register for it.
static unsigned AddLiveIn(MachineFunction &MF, unsigned PReg,
- TargetRegisterClass *RC) {
+ const TargetRegisterClass *RC) {
assert(RC->contains(PReg) && "Not the correct regclass!");
unsigned VReg = MF.getSSARegMap()->createVirtualRegister(RC);
MF.addLiveIn(PReg, VReg);
return VReg;
}
-/// HowToPassCCCArgument - Returns how an formal argument of the specified type
+/// HowToPassArgument - Returns how an formal argument of the specified type
/// should be passed. If it is through stack, returns the size of the stack
-/// slot; if it is through XMM register, returns the number of XMM registers
-/// are needed.
+/// slot; if it is through integer or XMM register, returns the number of
+/// integer or XMM registers are needed.
static void
-HowToPassCCCArgument(MVT::ValueType ObjectVT, unsigned NumXMMRegs,
- unsigned &ObjSize, unsigned &ObjXMMRegs) {
+HowToPassCallArgument(MVT::ValueType ObjectVT,
+ bool ArgInReg,
+ unsigned NumIntRegs, unsigned NumXMMRegs,
+ unsigned MaxNumIntRegs,
+ unsigned &ObjSize, unsigned &ObjIntRegs,
+ unsigned &ObjXMMRegs,
+ bool AllowVectors = true) {
+ ObjSize = 0;
+ ObjIntRegs = 0;
ObjXMMRegs = 0;
+ if (MaxNumIntRegs>3) {
+ // We don't have too much registers on ia32! :)
+ MaxNumIntRegs = 3;
+ }
+
switch (ObjectVT) {
default: assert(0 && "Unhandled argument type!");
- case MVT::i8: ObjSize = 1; break;
- case MVT::i16: ObjSize = 2; break;
- case MVT::i32: ObjSize = 4; break;
- case MVT::i64: ObjSize = 8; break;
- case MVT::f32: ObjSize = 4; break;
- case MVT::f64: ObjSize = 8; break;
+ case MVT::i8:
+ if (ArgInReg && (NumIntRegs < MaxNumIntRegs))
+ ObjIntRegs = 1;
+ else
+ ObjSize = 1;
+ break;
+ case MVT::i16:
+ if (ArgInReg && (NumIntRegs < MaxNumIntRegs))
+ ObjIntRegs = 1;
+ else
+ ObjSize = 2;
+ break;
+ case MVT::i32:
+ if (ArgInReg && (NumIntRegs < MaxNumIntRegs))
+ ObjIntRegs = 1;
+ else
+ ObjSize = 4;
+ break;
+ case MVT::i64:
+ if (ArgInReg && (NumIntRegs+2 <= MaxNumIntRegs)) {
+ ObjIntRegs = 2;
+ } else if (ArgInReg && (NumIntRegs+1 <= MaxNumIntRegs)) {
+ ObjIntRegs = 1;
+ ObjSize = 4;
+ } else
+ ObjSize = 8;
+ case MVT::f32:
+ ObjSize = 4;
+ break;
+ case MVT::f64:
+ ObjSize = 8;
+ break;
case MVT::v16i8:
case MVT::v8i16:
case MVT::v4i32:
case MVT::v2i64:
case MVT::v4f32:
case MVT::v2f64:
- if (NumXMMRegs < 4)
- ObjXMMRegs = 1;
- else
- ObjSize = 16;
- break;
+ if (AllowVectors) {
+ if (NumXMMRegs < 4)
+ ObjXMMRegs = 1;
+ else
+ ObjSize = 16;
+ break;
+ } else
+ assert(0 && "Unhandled argument type [vector]!");
}
}
-SDOperand X86TargetLowering::LowerCCCArguments(SDOperand Op, SelectionDAG &DAG) {
+SDOperand X86TargetLowering::LowerCCCArguments(SDOperand Op, SelectionDAG &DAG,
+ bool isStdCall) {
unsigned NumArgs = Op.Val->getNumValues() - 1;
MachineFunction &MF = DAG.getMachineFunction();
MachineFrameInfo *MFI = MF.getFrameInfo();
SDOperand Root = Op.getOperand(0);
std::vector<SDOperand> ArgValues;
+ bool isVarArg = cast<ConstantSDNode>(Op.getOperand(2))->getValue() != 0;
// Add DAG nodes to load the arguments... On entry to a function on the X86,
// the stack frame looks like this:
// [ESP + 8] -- second argument, if first argument is <= 4 bytes in size
// ...
//
- unsigned ArgOffset = 0; // Frame mechanisms handle retaddr slot
- unsigned NumXMMRegs = 0; // XMM regs used for parameter passing.
+ unsigned ArgOffset = 0; // Frame mechanisms handle retaddr slot
+ unsigned NumSRetBytes= 0; // How much bytes on stack used for struct return
+ unsigned NumXMMRegs = 0; // XMM regs used for parameter passing.
+ unsigned NumIntRegs = 0; // Integer regs used for parameter passing
+
static const unsigned XMMArgRegs[] = {
X86::XMM0, X86::XMM1, X86::XMM2, X86::XMM3
};
+ static const unsigned GPRArgRegs[][3] = {
+ { X86::AL, X86::DL, X86::CL },
+ { X86::AX, X86::DX, X86::CX },
+ { X86::EAX, X86::EDX, X86::ECX }
+ };
+ static const TargetRegisterClass* GPRClasses[3] = {
+ X86::GR8RegisterClass, X86::GR16RegisterClass, X86::GR32RegisterClass
+ };
+
+ // Handle regparm attribute
+ std::vector<bool> ArgInRegs(NumArgs, false);
+ std::vector<bool> SRetArgs(NumArgs, false);
+ if (!isVarArg) {
+ for (unsigned i = 0; i<NumArgs; ++i) {
+ unsigned Flags = cast<ConstantSDNode>(Op.getOperand(3+i))->getValue();
+ ArgInRegs[i] = (Flags >> 1) & 1;
+ SRetArgs[i] = (Flags >> 2) & 1;
+ }
+ }
+
for (unsigned i = 0; i < NumArgs; ++i) {
MVT::ValueType ObjectVT = Op.getValue(i).getValueType();
unsigned ArgIncrement = 4;
unsigned ObjSize = 0;
unsigned ObjXMMRegs = 0;
- HowToPassCCCArgument(ObjectVT, NumXMMRegs, ObjSize, ObjXMMRegs);
+ unsigned ObjIntRegs = 0;
+ unsigned Reg = 0;
+ SDOperand ArgValue;
+
+ HowToPassCallArgument(ObjectVT,
+ ArgInRegs[i],
+ NumIntRegs, NumXMMRegs, 3,
+ ObjSize, ObjIntRegs, ObjXMMRegs,
+ !isStdCall);
+
if (ObjSize > 4)
ArgIncrement = ObjSize;
- SDOperand ArgValue;
- if (ObjXMMRegs) {
- // Passed in a XMM register.
- unsigned Reg = AddLiveIn(MF, XMMArgRegs[NumXMMRegs],
- X86::VR128RegisterClass);
- ArgValue= DAG.getCopyFromReg(Root, Reg, ObjectVT);
- ArgValues.push_back(ArgValue);
+ if (ObjIntRegs || ObjXMMRegs) {
+ switch (ObjectVT) {
+ default: assert(0 && "Unhandled argument type!");
+ case MVT::i8:
+ case MVT::i16:
+ case MVT::i32: {
+ unsigned RegToUse = GPRArgRegs[ObjectVT-MVT::i8][NumIntRegs];
+ Reg = AddLiveIn(MF, RegToUse, GPRClasses[ObjectVT-MVT::i8]);
+ ArgValue = DAG.getCopyFromReg(Root, Reg, ObjectVT);
+ break;
+ }
+ case MVT::v16i8:
+ case MVT::v8i16:
+ case MVT::v4i32:
+ case MVT::v2i64:
+ case MVT::v4f32:
+ case MVT::v2f64:
+ assert(!isStdCall && "Unhandled argument type!");
+ Reg = AddLiveIn(MF, XMMArgRegs[NumXMMRegs], X86::VR128RegisterClass);
+ ArgValue = DAG.getCopyFromReg(Root, Reg, ObjectVT);
+ break;
+ }
+ NumIntRegs += ObjIntRegs;
NumXMMRegs += ObjXMMRegs;
- } else {
+ }
+ if (ObjSize) {
// XMM arguments have to be aligned on 16-byte boundary.
if (ObjSize == 16)
ArgOffset = ((ArgOffset + 15) / 16) * 16;
- // Create the frame index object for this incoming parameter...
+ // Create the SelectionDAG nodes corresponding to a load from this
+ // parameter.
int FI = MFI->CreateFixedObject(ObjSize, ArgOffset);
SDOperand FIN = DAG.getFrameIndex(FI, getPointerTy());
ArgValue = DAG.getLoad(Op.Val->getValueType(i), Root, FIN, NULL, 0);
- ArgValues.push_back(ArgValue);
- ArgOffset += ArgIncrement; // Move on to the next argument...
+
+ ArgOffset += ArgIncrement; // Move on to the next argument.
+ if (SRetArgs[i])
+ NumSRetBytes += ArgIncrement;
}
+
+ ArgValues.push_back(ArgValue);
}
ArgValues.push_back(Root);
// 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;
if (isVarArg)
VarArgsFrameIndex = MFI->CreateFixedObject(1, ArgOffset);
+
+ if (isStdCall && !isVarArg) {
+ BytesToPopOnReturn = ArgOffset; // Callee pops everything..
+ BytesCallerReserves = 0;
+ } else {
+ BytesToPopOnReturn = NumSRetBytes; // Callee pops hidden struct pointer.
+ BytesCallerReserves = ArgOffset;
+ }
+
RegSaveFrameIndex = 0xAAAAAAA; // X86-64 only.
ReturnAddrIndex = 0; // No return address slot generated yet.
- BytesToPopOnReturn = 0; // Callee pops nothing.
- BytesCallerReserves = ArgOffset;
- // If this is a struct return on Darwin/X86, the callee pops the hidden struct
- // pointer.
- if (MF.getFunction()->getCallingConv() == CallingConv::CSRet &&
- Subtarget->isTargetDarwin())
- BytesToPopOnReturn = 4;
+
+ MF.getInfo<X86FunctionInfo>()->setBytesToPopOnReturn(BytesToPopOnReturn);
// Return the new list of results.
std::vector<MVT::ValueType> RetVTs(Op.Val->value_begin(),
return DAG.getNode(ISD::MERGE_VALUES, RetVTs, &ArgValues[0],ArgValues.size());
}
-
-SDOperand X86TargetLowering::LowerCCCCallTo(SDOperand Op, SelectionDAG &DAG) {
+SDOperand X86TargetLowering::LowerCCCCallTo(SDOperand Op, SelectionDAG &DAG,
+ bool isStdCall) {
SDOperand Chain = Op.getOperand(0);
- unsigned CallingConv= cast<ConstantSDNode>(Op.getOperand(1))->getValue();
bool isVarArg = cast<ConstantSDNode>(Op.getOperand(2))->getValue() != 0;
bool isTailCall = cast<ConstantSDNode>(Op.getOperand(3))->getValue() != 0;
SDOperand Callee = Op.getOperand(4);
MVT::ValueType RetVT= Op.Val->getValueType(0);
unsigned NumOps = (Op.getNumOperands() - 5) / 2;
- // Keep track of the number of XMM regs passed so far.
- unsigned NumXMMRegs = 0;
static const unsigned XMMArgRegs[] = {
X86::XMM0, X86::XMM1, X86::XMM2, X86::XMM3
};
+ static const unsigned GPR32ArgRegs[] = {
+ X86::EAX, X86::EDX, X86::ECX
+ };
// Count how many bytes are to be pushed on the stack.
- unsigned NumBytes = 0;
+ unsigned NumBytes = 0;
+ // Keep track of the number of integer regs passed so far.
+ unsigned NumIntRegs = 0;
+ // Keep track of the number of XMM regs passed so far.
+ unsigned NumXMMRegs = 0;
+ // How much bytes on stack used for struct return
+ unsigned NumSRetBytes= 0;
+
+ // Handle regparm attribute
+ std::vector<bool> ArgInRegs(NumOps, false);
+ std::vector<bool> SRetArgs(NumOps, false);
+ for (unsigned i = 0; i<NumOps; ++i) {
+ unsigned Flags =
+ dyn_cast<ConstantSDNode>(Op.getOperand(5+2*i+1))->getValue();
+ ArgInRegs[i] = (Flags >> 1) & 1;
+ SRetArgs[i] = (Flags >> 2) & 1;
+ }
+
+ // Calculate stack frame size
for (unsigned i = 0; i != NumOps; ++i) {
SDOperand Arg = Op.getOperand(5+2*i);
+ unsigned ArgIncrement = 4;
+ unsigned ObjSize = 0;
+ unsigned ObjIntRegs = 0;
+ unsigned ObjXMMRegs = 0;
- switch (Arg.getValueType()) {
- default: assert(0 && "Unexpected ValueType for argument!");
- case MVT::i8:
- case MVT::i16:
- case MVT::i32:
- case MVT::f32:
- NumBytes += 4;
- break;
- case MVT::i64:
- case MVT::f64:
- NumBytes += 8;
- break;
- case MVT::v16i8:
- case MVT::v8i16:
- case MVT::v4i32:
- case MVT::v2i64:
- case MVT::v4f32:
- case MVT::v2f64:
- if (NumXMMRegs < 4)
- ++NumXMMRegs;
- else {
- // XMM arguments have to be aligned on 16-byte boundary.
+ HowToPassCallArgument(Arg.getValueType(),
+ ArgInRegs[i],
+ NumIntRegs, NumXMMRegs, 3,
+ ObjSize, ObjIntRegs, ObjXMMRegs,
+ !isStdCall);
+ if (ObjSize > 4)
+ ArgIncrement = ObjSize;
+
+ NumIntRegs += ObjIntRegs;
+ NumXMMRegs += ObjXMMRegs;
+ if (ObjSize) {
+ // XMM arguments have to be aligned on 16-byte boundary.
+ if (ObjSize == 16)
NumBytes = ((NumBytes + 15) / 16) * 16;
- NumBytes += 16;
- }
- break;
+ NumBytes += ArgIncrement;
}
}
// Arguments go on the stack in reverse order, as specified by the ABI.
unsigned ArgOffset = 0;
NumXMMRegs = 0;
+ NumIntRegs = 0;
std::vector<std::pair<unsigned, SDOperand> > RegsToPass;
std::vector<SDOperand> MemOpChains;
SDOperand StackPtr = DAG.getRegister(X86StackPtr, getPointerTy());
for (unsigned i = 0; i != NumOps; ++i) {
SDOperand Arg = Op.getOperand(5+2*i);
+ unsigned ArgIncrement = 4;
+ unsigned ObjSize = 0;
+ unsigned ObjIntRegs = 0;
+ unsigned ObjXMMRegs = 0;
- switch (Arg.getValueType()) {
- default: assert(0 && "Unexpected ValueType for argument!");
- case MVT::i8:
- case MVT::i16: {
+ HowToPassCallArgument(Arg.getValueType(),
+ ArgInRegs[i],
+ NumIntRegs, NumXMMRegs, 3,
+ ObjSize, ObjIntRegs, ObjXMMRegs,
+ !isStdCall);
+
+ if (ObjSize > 4)
+ ArgIncrement = ObjSize;
+
+ if (Arg.getValueType() == MVT::i8 || Arg.getValueType() == MVT::i16) {
// Promote the integer to 32 bits. If the input type is signed use a
// sign extend, otherwise use a zero extend.
- unsigned ExtOp =
- dyn_cast<ConstantSDNode>(Op.getOperand(5+2*i+1))->getValue() ?
- ISD::SIGN_EXTEND : ISD::ZERO_EXTEND;
+ unsigned Flags = cast<ConstantSDNode>(Op.getOperand(5+2*i+1))->getValue();
+
+ unsigned ExtOp = (Flags & 1) ? ISD::SIGN_EXTEND : ISD::ZERO_EXTEND;
Arg = DAG.getNode(ExtOp, MVT::i32, Arg);
}
- // Fallthrough
- case MVT::i32:
- case MVT::f32: {
- SDOperand PtrOff = DAG.getConstant(ArgOffset, getPointerTy());
- PtrOff = DAG.getNode(ISD::ADD, getPointerTy(), StackPtr, PtrOff);
- MemOpChains.push_back(DAG.getStore(Chain, Arg, PtrOff, NULL, 0));
- ArgOffset += 4;
- break;
+ if (ObjIntRegs || ObjXMMRegs) {
+ switch (Arg.getValueType()) {
+ default: assert(0 && "Unhandled argument type!");
+ case MVT::i32:
+ RegsToPass.push_back(std::make_pair(GPR32ArgRegs[NumIntRegs], Arg));
+ break;
+ case MVT::v16i8:
+ case MVT::v8i16:
+ case MVT::v4i32:
+ case MVT::v2i64:
+ case MVT::v4f32:
+ case MVT::v2f64:
+ assert(!isStdCall && "Unhandled argument type!");
+ RegsToPass.push_back(std::make_pair(XMMArgRegs[NumXMMRegs], Arg));
+ break;
+ }
+
+ NumIntRegs += ObjIntRegs;
+ NumXMMRegs += ObjXMMRegs;
}
- case MVT::i64:
- case MVT::f64: {
+ if (ObjSize) {
+ // XMM arguments have to be aligned on 16-byte boundary.
+ if (ObjSize == 16)
+ ArgOffset = ((ArgOffset + 15) / 16) * 16;
+
SDOperand PtrOff = DAG.getConstant(ArgOffset, getPointerTy());
PtrOff = DAG.getNode(ISD::ADD, getPointerTy(), StackPtr, PtrOff);
MemOpChains.push_back(DAG.getStore(Chain, Arg, PtrOff, NULL, 0));
- ArgOffset += 8;
- break;
- }
- case MVT::v16i8:
- case MVT::v8i16:
- case MVT::v4i32:
- case MVT::v2i64:
- case MVT::v4f32:
- case MVT::v2f64:
- if (NumXMMRegs < 4) {
- RegsToPass.push_back(std::make_pair(XMMArgRegs[NumXMMRegs], Arg));
- NumXMMRegs++;
- } else {
- // XMM arguments have to be aligned on 16-byte boundary.
- ArgOffset = ((ArgOffset + 15) / 16) * 16;
- SDOperand PtrOff = DAG.getConstant(ArgOffset, getPointerTy());
- PtrOff = DAG.getNode(ISD::ADD, getPointerTy(), StackPtr, PtrOff);
- MemOpChains.push_back(DAG.getStore(Chain, Arg, PtrOff, NULL, 0));
- ArgOffset += 16;
- }
+
+ ArgOffset += ArgIncrement; // Move on to the next argument.
+ if (SRetArgs[i])
+ NumSRetBytes += ArgIncrement;
}
}
+ // Sanity check: we haven't seen NumSRetBytes > 4
+ assert((NumSRetBytes<=4) &&
+ "Too much space for struct-return pointer requested");
+
if (!MemOpChains.empty())
Chain = DAG.getNode(ISD::TokenFactor, MVT::Other,
&MemOpChains[0], MemOpChains.size());
InFlag = Chain.getValue(1);
}
+ // ELF / PIC requires GOT in the EBX register before function calls via PLT
+ // GOT pointer.
+ if (getTargetMachine().getRelocationModel() == Reloc::PIC_ &&
+ Subtarget->isPICStyleGOT()) {
+ Chain = DAG.getCopyToReg(Chain, X86::EBX,
+ DAG.getNode(X86ISD::GlobalBaseReg, getPointerTy()),
+ InFlag);
+ InFlag = Chain.getValue(1);
+ }
+
// If the callee is a GlobalAddress node (quite common, every direct call is)
// turn it into a TargetGlobalAddress node so that legalize doesn't hack it.
- if (GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee))
- Callee = DAG.getTargetGlobalAddress(G->getGlobal(), getPointerTy());
- else if (ExternalSymbolSDNode *S = dyn_cast<ExternalSymbolSDNode>(Callee))
+ if (GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee)) {
+ // We should use extra load for direct calls to dllimported functions in
+ // non-JIT mode.
+ if (!Subtarget->GVRequiresExtraLoad(G->getGlobal(),
+ getTargetMachine(), true))
+ Callee = DAG.getTargetGlobalAddress(G->getGlobal(), getPointerTy());
+ } else if (ExternalSymbolSDNode *S = dyn_cast<ExternalSymbolSDNode>(Callee))
Callee = DAG.getTargetExternalSymbol(S->getSymbol(), getPointerTy());
std::vector<MVT::ValueType> NodeTys;
// Add argument registers to the end of the list so that they are known live
// into the call.
for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i)
- Ops.push_back(DAG.getRegister(RegsToPass[i].first,
+ Ops.push_back(DAG.getRegister(RegsToPass[i].first,
RegsToPass[i].second.getValueType()));
+ // Add an implicit use GOT pointer in EBX.
+ if (getTargetMachine().getRelocationModel() == Reloc::PIC_ &&
+ Subtarget->isPICStyleGOT())
+ Ops.push_back(DAG.getRegister(X86::EBX, getPointerTy()));
+
if (InFlag.Val)
Ops.push_back(InFlag);
// Create the CALLSEQ_END node.
unsigned NumBytesForCalleeToPush = 0;
- // If this is is a call to a struct-return function on Darwin/X86, the callee
- // pops the hidden struct pointer, so we have to push it back.
- if (CallingConv == CallingConv::CSRet && Subtarget->isTargetDarwin())
- NumBytesForCalleeToPush = 4;
+ if (isStdCall) {
+ if (isVarArg) {
+ NumBytesForCalleeToPush = NumSRetBytes;
+ } else {
+ NumBytesForCalleeToPush = NumBytes;
+ }
+ } else {
+ // If this is is a call to a struct-return function, the callee
+ // pops the hidden struct pointer, so we have to push it back.
+ // This is common for Darwin/X86, Linux & Mingw32 targets.
+ NumBytesForCalleeToPush = NumSRetBytes;
+ }
NodeTys.clear();
NodeTys.push_back(MVT::Other); // Returns a chain
Chain = DAG.getNode(ISD::CALLSEQ_END, NodeTys, &Ops[0], Ops.size());
if (RetVT != MVT::Other)
InFlag = Chain.getValue(1);
-
+
std::vector<SDOperand> ResultVals;
NodeTys.clear();
switch (RetVT) {
case MVT::v2i64:
case MVT::v4f32:
case MVT::v2f64:
+ assert(!isStdCall && "Unknown value type to return!");
Chain = DAG.getCopyFromReg(Chain, X86::XMM0, RetVT, InFlag).getValue(1);
ResultVals.push_back(Chain.getValue(0));
NodeTys.push_back(RetVT);
std::vector<SDOperand> Ops;
Ops.push_back(Chain);
Ops.push_back(InFlag);
- SDOperand RetVal = DAG.getNode(X86ISD::FP_GET_RESULT, Tys,
+ SDOperand RetVal = DAG.getNode(X86ISD::FP_GET_RESULT, Tys,
&Ops[0], Ops.size());
Chain = RetVal.getValue(1);
InFlag = RetVal.getValue(2);
// If the function returns void, just return the chain.
if (ResultVals.empty())
return Chain;
-
+
// Otherwise, merge everything together with a MERGE_VALUES node.
NodeTys.push_back(MVT::Other);
ResultVals.push_back(Chain);
TargetRegisterClass *RC = NULL;
switch (ObjectVT) {
default: break;
- case MVT::i8:
+ case MVT::i8:
RC = X86::GR8RegisterClass;
Reg = GPR8ArgRegs[NumIntRegs];
break;
SDOperand
X86TargetLowering::LowerX86_64CCCCallTo(SDOperand Op, SelectionDAG &DAG) {
SDOperand Chain = Op.getOperand(0);
- unsigned CallingConv= cast<ConstantSDNode>(Op.getOperand(1))->getValue();
bool isVarArg = cast<ConstantSDNode>(Op.getOperand(2))->getValue() != 0;
bool isTailCall = cast<ConstantSDNode>(Op.getOperand(3))->getValue() != 0;
SDOperand Callee = Op.getOperand(4);
// If the callee is a GlobalAddress node (quite common, every direct call is)
// turn it into a TargetGlobalAddress node so that legalize doesn't hack it.
- if (GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee))
- Callee = DAG.getTargetGlobalAddress(G->getGlobal(), getPointerTy());
- else if (ExternalSymbolSDNode *S = dyn_cast<ExternalSymbolSDNode>(Callee))
+ if (GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee)) {
+ // We should use extra load for direct calls to dllimported functions in
+ // non-JIT mode.
+ if (!Subtarget->GVRequiresExtraLoad(G->getGlobal(),
+ getTargetMachine(), true))
+ Callee = DAG.getTargetGlobalAddress(G->getGlobal(), getPointerTy());
+ } else if (ExternalSymbolSDNode *S = dyn_cast<ExternalSymbolSDNode>(Callee))
Callee = DAG.getTargetExternalSymbol(S->getSymbol(), getPointerTy());
std::vector<MVT::ValueType> NodeTys;
// Add argument registers to the end of the list so that they are known live
// into the call.
for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i)
- Ops.push_back(DAG.getRegister(RegsToPass[i].first,
+ Ops.push_back(DAG.getRegister(RegsToPass[i].first,
RegsToPass[i].second.getValueType()));
if (InFlag.Val)
Chain = DAG.getNode(ISD::CALLSEQ_END, NodeTys, &Ops[0], Ops.size());
if (RetVT != MVT::Other)
InFlag = Chain.getValue(1);
-
+
std::vector<SDOperand> ResultVals;
NodeTys.clear();
switch (RetVT) {
// If the function returns void, just return the chain.
if (ResultVals.empty())
return Chain;
-
+
// Otherwise, merge everything together with a MERGE_VALUES node.
NodeTys.push_back(MVT::Other);
ResultVals.push_back(Chain);
}
//===----------------------------------------------------------------------===//
-// Fast Calling Convention implementation
+// Fast & FastCall Calling Convention implementation
//===----------------------------------------------------------------------===//
//
// The X86 'fast' calling convention passes up to two integer arguments in
// Note that this can be enhanced in the future to pass fp vals in registers
// (when we have a global fp allocator) and do other tricks.
//
+//===----------------------------------------------------------------------===//
+// The X86 'fastcall' calling convention passes up to two integer arguments in
+// registers (an appropriate portion of ECX/EDX), passes arguments in C order,
+// and requires that the callee pop its arguments off the stack (allowing proper
+// tail calls), and has the same return value conventions as C calling convs.
+//
+// This calling convention always arranges for the callee pop value to be 8n+4
+// bytes, which is needed for tail recursion elimination and stack alignment
+// reasons.
-/// HowToPassFastCCArgument - Returns how an formal argument of the specified
-/// type should be passed. If it is through stack, returns the size of the stack
-/// slot; if it is through integer or XMM register, returns the number of
-/// integer or XMM registers are needed.
-static void
-HowToPassFastCCArgument(MVT::ValueType ObjectVT,
- unsigned NumIntRegs, unsigned NumXMMRegs,
- unsigned &ObjSize, unsigned &ObjIntRegs,
- unsigned &ObjXMMRegs) {
- ObjSize = 0;
- ObjIntRegs = 0;
- ObjXMMRegs = 0;
-
- switch (ObjectVT) {
- default: assert(0 && "Unhandled argument type!");
- case MVT::i8:
-#if FASTCC_NUM_INT_ARGS_INREGS > 0
- if (NumIntRegs < FASTCC_NUM_INT_ARGS_INREGS)
- ObjIntRegs = 1;
- else
-#endif
- ObjSize = 1;
- break;
- case MVT::i16:
-#if FASTCC_NUM_INT_ARGS_INREGS > 0
- if (NumIntRegs < FASTCC_NUM_INT_ARGS_INREGS)
- ObjIntRegs = 1;
- else
-#endif
- ObjSize = 2;
- break;
- case MVT::i32:
-#if FASTCC_NUM_INT_ARGS_INREGS > 0
- if (NumIntRegs < FASTCC_NUM_INT_ARGS_INREGS)
- ObjIntRegs = 1;
- else
-#endif
- ObjSize = 4;
- break;
- case MVT::i64:
-#if FASTCC_NUM_INT_ARGS_INREGS > 0
- if (NumIntRegs+2 <= FASTCC_NUM_INT_ARGS_INREGS) {
- ObjIntRegs = 2;
- } else if (NumIntRegs+1 <= FASTCC_NUM_INT_ARGS_INREGS) {
- ObjIntRegs = 1;
- ObjSize = 4;
- } else
-#endif
- ObjSize = 8;
- case MVT::f32:
- ObjSize = 4;
- break;
- case MVT::f64:
- ObjSize = 8;
- break;
- case MVT::v16i8:
- case MVT::v8i16:
- case MVT::v4i32:
- case MVT::v2i64:
- case MVT::v4f32:
- case MVT::v2f64:
- if (NumXMMRegs < 4)
- ObjXMMRegs = 1;
- else
- ObjSize = 16;
- break;
- }
-}
SDOperand
-X86TargetLowering::LowerFastCCArguments(SDOperand Op, SelectionDAG &DAG) {
+X86TargetLowering::LowerFastCCArguments(SDOperand Op, SelectionDAG &DAG,
+ bool isFastCall) {
unsigned NumArgs = Op.Val->getNumValues()-1;
MachineFunction &MF = DAG.getMachineFunction();
MachineFrameInfo *MFI = MF.getFrameInfo();
unsigned ArgOffset = 0; // Frame mechanisms handle retaddr slot
// Keep track of the number of integer regs passed so far. This can be either
- // 0 (neither EAX or EDX used), 1 (EAX is used) or 2 (EAX and EDX are both
- // used).
+ // 0 (neither EAX/ECX or EDX used), 1 (EAX/ECX is used) or 2 (EAX/ECX and EDX
+ // are both used).
unsigned NumIntRegs = 0;
unsigned NumXMMRegs = 0; // XMM regs used for parameter passing.
static const unsigned XMMArgRegs[] = {
X86::XMM0, X86::XMM1, X86::XMM2, X86::XMM3
};
-
+
+ static const unsigned GPRArgRegs[][2][2] = {
+ {{ X86::AL, X86::DL }, { X86::CL, X86::DL }},
+ {{ X86::AX, X86::DX }, { X86::CX, X86::DX }},
+ {{ X86::EAX, X86::EDX }, { X86::ECX, X86::EDX }}
+ };
+
+ static const TargetRegisterClass* GPRClasses[3] = {
+ X86::GR8RegisterClass, X86::GR16RegisterClass, X86::GR32RegisterClass
+ };
+
+ unsigned GPRInd = (isFastCall ? 1 : 0);
for (unsigned i = 0; i < NumArgs; ++i) {
MVT::ValueType ObjectVT = Op.getValue(i).getValueType();
unsigned ArgIncrement = 4;
unsigned ObjSize = 0;
- unsigned ObjIntRegs = 0;
unsigned ObjXMMRegs = 0;
-
- HowToPassFastCCArgument(ObjectVT, NumIntRegs, NumXMMRegs,
- ObjSize, ObjIntRegs, ObjXMMRegs);
+ unsigned ObjIntRegs = 0;
+ unsigned Reg = 0;
+ SDOperand ArgValue;
+
+ HowToPassCallArgument(ObjectVT,
+ true, // Use as much registers as possible
+ NumIntRegs, NumXMMRegs,
+ (isFastCall ? 2 : FASTCC_NUM_INT_ARGS_INREGS),
+ ObjSize, ObjIntRegs, ObjXMMRegs,
+ !isFastCall);
+
if (ObjSize > 4)
ArgIncrement = ObjSize;
- unsigned Reg = 0;
- SDOperand ArgValue;
if (ObjIntRegs || ObjXMMRegs) {
switch (ObjectVT) {
default: assert(0 && "Unhandled argument type!");
case MVT::i8:
- Reg = AddLiveIn(MF, NumIntRegs ? X86::DL : X86::AL,
- X86::GR8RegisterClass);
- ArgValue = DAG.getCopyFromReg(Root, Reg, MVT::i8);
- break;
case MVT::i16:
- Reg = AddLiveIn(MF, NumIntRegs ? X86::DX : X86::AX,
- X86::GR16RegisterClass);
- ArgValue = DAG.getCopyFromReg(Root, Reg, MVT::i16);
- break;
- case MVT::i32:
- Reg = AddLiveIn(MF, NumIntRegs ? X86::EDX : X86::EAX,
- X86::GR32RegisterClass);
- ArgValue = DAG.getCopyFromReg(Root, Reg, MVT::i32);
- break;
- case MVT::i64:
- Reg = AddLiveIn(MF, NumIntRegs ? X86::EDX : X86::EAX,
- X86::GR32RegisterClass);
- ArgValue = DAG.getCopyFromReg(Root, Reg, MVT::i32);
- if (ObjIntRegs == 2) {
- Reg = AddLiveIn(MF, X86::EDX, X86::GR32RegisterClass);
- SDOperand ArgValue2 = DAG.getCopyFromReg(Root, Reg, MVT::i32);
- ArgValue= DAG.getNode(ISD::BUILD_PAIR, MVT::i64, ArgValue, ArgValue2);
- }
+ case MVT::i32: {
+ unsigned RegToUse = GPRArgRegs[ObjectVT-MVT::i8][GPRInd][NumIntRegs];
+ Reg = AddLiveIn(MF, RegToUse, GPRClasses[ObjectVT-MVT::i8]);
+ ArgValue = DAG.getCopyFromReg(Root, Reg, ObjectVT);
break;
+ }
case MVT::v16i8:
case MVT::v8i16:
case MVT::v4i32:
case MVT::v2i64:
case MVT::v4f32:
- case MVT::v2f64:
+ case MVT::v2f64: {
+ assert(!isFastCall && "Unhandled argument type!");
Reg = AddLiveIn(MF, XMMArgRegs[NumXMMRegs], X86::VR128RegisterClass);
ArgValue = DAG.getCopyFromReg(Root, Reg, ObjectVT);
break;
}
+ }
NumIntRegs += ObjIntRegs;
NumXMMRegs += ObjXMMRegs;
}
-
if (ObjSize) {
// XMM arguments have to be aligned on 16-byte boundary.
if (ObjSize == 16)
// parameter.
int FI = MFI->CreateFixedObject(ObjSize, ArgOffset);
SDOperand FIN = DAG.getFrameIndex(FI, getPointerTy());
- if (ObjectVT == MVT::i64 && ObjIntRegs) {
- SDOperand ArgValue2 = DAG.getLoad(Op.Val->getValueType(i), Root, FIN,
- NULL, 0);
- ArgValue = DAG.getNode(ISD::BUILD_PAIR, MVT::i64, ArgValue, ArgValue2);
- } else
- ArgValue = DAG.getLoad(Op.Val->getValueType(i), Root, FIN, NULL, 0);
+ ArgValue = DAG.getLoad(Op.Val->getValueType(i), Root, FIN, NULL, 0);
+
ArgOffset += ArgIncrement; // Move on to the next argument.
}
BytesToPopOnReturn = ArgOffset; // Callee pops all stack arguments.
BytesCallerReserves = 0;
+ MF.getInfo<X86FunctionInfo>()->setBytesToPopOnReturn(BytesToPopOnReturn);
+
// Finally, inform the code generator which regs we return values in.
switch (getValueType(MF.getFunction()->getReturnType())) {
default: assert(0 && "Unknown type!");
case MVT::v2i64:
case MVT::v4f32:
case MVT::v2f64:
+ assert(!isFastCall && "Unknown result type");
MF.addLiveOut(X86::XMM0);
break;
}
SDOperand X86TargetLowering::LowerFastCCCallTo(SDOperand Op, SelectionDAG &DAG,
bool isFastCall) {
SDOperand Chain = Op.getOperand(0);
- unsigned CallingConv= cast<ConstantSDNode>(Op.getOperand(1))->getValue();
- bool isVarArg = cast<ConstantSDNode>(Op.getOperand(2))->getValue() != 0;
bool isTailCall = cast<ConstantSDNode>(Op.getOperand(3))->getValue() != 0;
SDOperand Callee = Op.getOperand(4);
MVT::ValueType RetVT= Op.Val->getValueType(0);
unsigned NumBytes = 0;
// Keep track of the number of integer regs passed so far. This can be either
- // 0 (neither EAX or EDX used), 1 (EAX is used) or 2 (EAX and EDX are both
- // used).
+ // 0 (neither EAX/ECX or EDX used), 1 (EAX/ECX is used) or 2 (EAX/ECX and EDX
+ // are both used).
unsigned NumIntRegs = 0;
unsigned NumXMMRegs = 0; // XMM regs used for parameter passing.
- static const unsigned GPRArgRegs[][2] = {
- { X86::AL, X86::DL },
- { X86::AX, X86::DX },
- { X86::EAX, X86::EDX }
+ static const unsigned GPRArgRegs[][2][2] = {
+ {{ X86::AL, X86::DL }, { X86::CL, X86::DL }},
+ {{ X86::AX, X86::DX }, { X86::CX, X86::DX }},
+ {{ X86::EAX, X86::EDX }, { X86::ECX, X86::EDX }}
};
- static const unsigned FastCallGPRArgRegs[][2] = {
- { X86::CL, X86::DL },
- { X86::CX, X86::DX },
- { X86::ECX, X86::EDX }
- };
static const unsigned XMMArgRegs[] = {
X86::XMM0, X86::XMM1, X86::XMM2, X86::XMM3
};
+ unsigned GPRInd = (isFastCall ? 1 : 0);
for (unsigned i = 0; i != NumOps; ++i) {
SDOperand Arg = Op.getOperand(5+2*i);
case MVT::v2i64:
case MVT::v4f32:
case MVT::v2f64:
- if (isFastCall) {
- assert(0 && "Unknown value type!");
- } else {
- if (NumXMMRegs < 4)
- NumXMMRegs++;
- else {
- // XMM arguments have to be aligned on 16-byte boundary.
- NumBytes = ((NumBytes + 15) / 16) * 16;
- NumBytes += 16;
- }
- }
- break;
+ assert(!isFastCall && "Unknown value type!");
+ if (NumXMMRegs < 4)
+ NumXMMRegs++;
+ else {
+ // XMM arguments have to be aligned on 16-byte boundary.
+ NumBytes = ((NumBytes + 15) / 16) * 16;
+ NumBytes += 16;
+ }
+ break;
}
}
case MVT::i32: {
unsigned MaxNumIntRegs = (isFastCall ? 2 : FASTCC_NUM_INT_ARGS_INREGS);
if (NumIntRegs < MaxNumIntRegs) {
- RegsToPass.push_back(
- std::make_pair(GPRArgRegs[Arg.getValueType()-MVT::i8][NumIntRegs],
- Arg));
+ unsigned RegToUse =
+ GPRArgRegs[Arg.getValueType()-MVT::i8][GPRInd][NumIntRegs];
+ RegsToPass.push_back(std::make_pair(RegToUse, Arg));
++NumIntRegs;
break;
}
- } // Fall through
+ } // Fall through
case MVT::f32: {
SDOperand PtrOff = DAG.getConstant(ArgOffset, getPointerTy());
PtrOff = DAG.getNode(ISD::ADD, getPointerTy(), StackPtr, PtrOff);
case MVT::v2i64:
case MVT::v4f32:
case MVT::v2f64:
- if (isFastCall) {
- assert(0 && "Unexpected ValueType for argument!");
- } else {
- if (NumXMMRegs < 4) {
- RegsToPass.push_back(std::make_pair(XMMArgRegs[NumXMMRegs], Arg));
- NumXMMRegs++;
- } else {
- // XMM arguments have to be aligned on 16-byte boundary.
- ArgOffset = ((ArgOffset + 15) / 16) * 16;
- SDOperand PtrOff = DAG.getConstant(ArgOffset, getPointerTy());
- PtrOff = DAG.getNode(ISD::ADD, getPointerTy(), StackPtr, PtrOff);
- MemOpChains.push_back(DAG.getStore(Chain, Arg, PtrOff, NULL, 0));
- ArgOffset += 16;
- }
- }
- break;
+ assert(!isFastCall && "Unexpected ValueType for argument!");
+ if (NumXMMRegs < 4) {
+ RegsToPass.push_back(std::make_pair(XMMArgRegs[NumXMMRegs], Arg));
+ NumXMMRegs++;
+ } else {
+ // XMM arguments have to be aligned on 16-byte boundary.
+ ArgOffset = ((ArgOffset + 15) / 16) * 16;
+ SDOperand PtrOff = DAG.getConstant(ArgOffset, getPointerTy());
+ PtrOff = DAG.getNode(ISD::ADD, getPointerTy(), StackPtr, PtrOff);
+ MemOpChains.push_back(DAG.getStore(Chain, Arg, PtrOff, NULL, 0));
+ ArgOffset += 16;
+ }
+ break;
}
}
// If the callee is a GlobalAddress node (quite common, every direct call is)
// turn it into a TargetGlobalAddress node so that legalize doesn't hack it.
- if (GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee))
- Callee = DAG.getTargetGlobalAddress(G->getGlobal(), getPointerTy());
- else if (ExternalSymbolSDNode *S = dyn_cast<ExternalSymbolSDNode>(Callee))
+ if (GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee)) {
+ // We should use extra load for direct calls to dllimported functions in
+ // non-JIT mode.
+ if (!Subtarget->GVRequiresExtraLoad(G->getGlobal(),
+ getTargetMachine(), true))
+ Callee = DAG.getTargetGlobalAddress(G->getGlobal(), getPointerTy());
+ } else if (ExternalSymbolSDNode *S = dyn_cast<ExternalSymbolSDNode>(Callee))
Callee = DAG.getTargetExternalSymbol(S->getSymbol(), getPointerTy());
+ // ELF / PIC requires GOT in the EBX register before function calls via PLT
+ // GOT pointer.
+ if (getTargetMachine().getRelocationModel() == Reloc::PIC_ &&
+ Subtarget->isPICStyleGOT()) {
+ Chain = DAG.getCopyToReg(Chain, X86::EBX,
+ DAG.getNode(X86ISD::GlobalBaseReg, getPointerTy()),
+ InFlag);
+ InFlag = Chain.getValue(1);
+ }
+
std::vector<MVT::ValueType> NodeTys;
NodeTys.push_back(MVT::Other); // Returns a chain
NodeTys.push_back(MVT::Flag); // Returns a flag for retval copy to use.
// Add argument registers to the end of the list so that they are known live
// into the call.
for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i)
- Ops.push_back(DAG.getRegister(RegsToPass[i].first,
+ Ops.push_back(DAG.getRegister(RegsToPass[i].first,
RegsToPass[i].second.getValueType()));
+ // Add an implicit use GOT pointer in EBX.
+ if (getTargetMachine().getRelocationModel() == Reloc::PIC_ &&
+ Subtarget->isPICStyleGOT())
+ Ops.push_back(DAG.getRegister(X86::EBX, getPointerTy()));
+
if (InFlag.Val)
Ops.push_back(InFlag);
if (RetVT != MVT::Other)
NodeTys.push_back(MVT::Flag); // Returns a flag for retval copy to use.
Ops.clear();
- Ops.push_back(Chain);
- Ops.push_back(DAG.getConstant(NumBytes, getPointerTy()));
- Ops.push_back(DAG.getConstant(NumBytes, getPointerTy()));
- Ops.push_back(InFlag);
- Chain = DAG.getNode(ISD::CALLSEQ_END, NodeTys, &Ops[0], Ops.size());
- if (RetVT != MVT::Other)
- InFlag = Chain.getValue(1);
-
- std::vector<SDOperand> ResultVals;
- NodeTys.clear();
- switch (RetVT) {
- default: assert(0 && "Unknown value type to return!");
- case MVT::Other: break;
- case MVT::i8:
- Chain = DAG.getCopyFromReg(Chain, X86::AL, MVT::i8, InFlag).getValue(1);
- ResultVals.push_back(Chain.getValue(0));
- NodeTys.push_back(MVT::i8);
- break;
- case MVT::i16:
- Chain = DAG.getCopyFromReg(Chain, X86::AX, MVT::i16, InFlag).getValue(1);
- ResultVals.push_back(Chain.getValue(0));
- NodeTys.push_back(MVT::i16);
- break;
- case MVT::i32:
- if (Op.Val->getValueType(1) == MVT::i32) {
- Chain = DAG.getCopyFromReg(Chain, X86::EAX, MVT::i32, InFlag).getValue(1);
- ResultVals.push_back(Chain.getValue(0));
- Chain = DAG.getCopyFromReg(Chain, X86::EDX, MVT::i32,
- Chain.getValue(2)).getValue(1);
- ResultVals.push_back(Chain.getValue(0));
- NodeTys.push_back(MVT::i32);
- } else {
- Chain = DAG.getCopyFromReg(Chain, X86::EAX, MVT::i32, InFlag).getValue(1);
- ResultVals.push_back(Chain.getValue(0));
- }
- NodeTys.push_back(MVT::i32);
- break;
- case MVT::v16i8:
- case MVT::v8i16:
- case MVT::v4i32:
- case MVT::v2i64:
- case MVT::v4f32:
- case MVT::v2f64:
- if (isFastCall) {
- assert(0 && "Unknown value type to return!");
- } else {
- Chain = DAG.getCopyFromReg(Chain, X86::XMM0, RetVT, InFlag).getValue(1);
- ResultVals.push_back(Chain.getValue(0));
- NodeTys.push_back(RetVT);
- }
- break;
- case MVT::f32:
- case MVT::f64: {
- std::vector<MVT::ValueType> Tys;
- Tys.push_back(MVT::f64);
- Tys.push_back(MVT::Other);
- Tys.push_back(MVT::Flag);
- std::vector<SDOperand> Ops;
- Ops.push_back(Chain);
- Ops.push_back(InFlag);
- SDOperand RetVal = DAG.getNode(X86ISD::FP_GET_RESULT, Tys,
- &Ops[0], Ops.size());
- Chain = RetVal.getValue(1);
- InFlag = RetVal.getValue(2);
- if (X86ScalarSSE) {
- // FIXME: Currently the FST is flagged to the FP_GET_RESULT. This
- // shouldn't be necessary except that RFP cannot be live across
- // multiple blocks. When stackifier is fixed, they can be uncoupled.
- MachineFunction &MF = DAG.getMachineFunction();
- int SSFI = MF.getFrameInfo()->CreateStackObject(8, 8);
- SDOperand StackSlot = DAG.getFrameIndex(SSFI, getPointerTy());
- Tys.clear();
- Tys.push_back(MVT::Other);
- Ops.clear();
- Ops.push_back(Chain);
- Ops.push_back(RetVal);
- Ops.push_back(StackSlot);
- Ops.push_back(DAG.getValueType(RetVT));
- Ops.push_back(InFlag);
- Chain = DAG.getNode(X86ISD::FST, Tys, &Ops[0], Ops.size());
- RetVal = DAG.getLoad(RetVT, Chain, StackSlot, NULL, 0);
- Chain = RetVal.getValue(1);
- }
-
- if (RetVT == MVT::f32 && !X86ScalarSSE)
- // FIXME: we would really like to remember that this FP_ROUND
- // operation is okay to eliminate if we allow excess FP precision.
- RetVal = DAG.getNode(ISD::FP_ROUND, MVT::f32, RetVal);
- ResultVals.push_back(RetVal);
- NodeTys.push_back(RetVT);
- break;
- }
- }
-
-
- // If the function returns void, just return the chain.
- if (ResultVals.empty())
- return Chain;
-
- // Otherwise, merge everything together with a MERGE_VALUES node.
- NodeTys.push_back(MVT::Other);
- ResultVals.push_back(Chain);
- SDOperand Res = DAG.getNode(ISD::MERGE_VALUES, NodeTys,
- &ResultVals[0], ResultVals.size());
- return Res.getValue(Op.ResNo);
-}
-
-//===----------------------------------------------------------------------===//
-// StdCall Calling Convention implementation
-//===----------------------------------------------------------------------===//
-// StdCall calling convention seems to be standard for many Windows' API
-// routines and around. It differs from C calling convention just a little:
-// callee should clean up the stack, not caller. Symbols should be also
-// decorated in some fancy way :) It doesn't support any vector arguments.
-
-/// HowToPassStdCallCCArgument - Returns how an formal argument of the specified
-/// type should be passed. Returns the size of the stack slot
-static void
-HowToPassStdCallCCArgument(MVT::ValueType ObjectVT, unsigned &ObjSize) {
- switch (ObjectVT) {
- default: assert(0 && "Unhandled argument type!");
- case MVT::i8: ObjSize = 1; break;
- case MVT::i16: ObjSize = 2; break;
- case MVT::i32: ObjSize = 4; break;
- case MVT::i64: ObjSize = 8; break;
- case MVT::f32: ObjSize = 4; break;
- case MVT::f64: ObjSize = 8; break;
- }
-}
-
-SDOperand X86TargetLowering::LowerStdCallCCArguments(SDOperand Op,
- SelectionDAG &DAG) {
- unsigned NumArgs = Op.Val->getNumValues() - 1;
- MachineFunction &MF = DAG.getMachineFunction();
- MachineFrameInfo *MFI = MF.getFrameInfo();
- SDOperand Root = Op.getOperand(0);
- std::vector<SDOperand> ArgValues;
-
- // Add DAG nodes to load the arguments... On entry to a function on the X86,
- // the stack frame looks like this:
- //
- // [ESP] -- return address
- // [ESP + 4] -- first argument (leftmost lexically)
- // [ESP + 8] -- second argument, if first argument is <= 4 bytes in size
- // ...
- //
- unsigned ArgOffset = 0; // Frame mechanisms handle retaddr slot
- for (unsigned i = 0; i < NumArgs; ++i) {
- MVT::ValueType ObjectVT = Op.getValue(i).getValueType();
- unsigned ArgIncrement = 4;
- unsigned ObjSize = 0;
- HowToPassStdCallCCArgument(ObjectVT, ObjSize);
- if (ObjSize > 4)
- ArgIncrement = ObjSize;
-
- SDOperand ArgValue;
- // Create the frame index object for this incoming parameter...
- int FI = MFI->CreateFixedObject(ObjSize, ArgOffset);
- SDOperand FIN = DAG.getFrameIndex(FI, getPointerTy());
- ArgValue = DAG.getLoad(Op.Val->getValueType(i), Root, FIN, NULL, 0);
- ArgValues.push_back(ArgValue);
- ArgOffset += ArgIncrement; // Move on to the next argument...
- }
-
- ArgValues.push_back(Root);
-
- // 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;
- if (isVarArg) {
- BytesToPopOnReturn = 0; // Callee pops nothing.
- BytesCallerReserves = ArgOffset;
- VarArgsFrameIndex = MFI->CreateFixedObject(1, ArgOffset);
- } else {
- BytesToPopOnReturn = ArgOffset; // Callee pops everything..
- BytesCallerReserves = 0;
- }
- RegSaveFrameIndex = 0xAAAAAAA; // X86-64 only.
- ReturnAddrIndex = 0; // No return address slot generated yet.
-
- MF.getInfo<X86FunctionInfo>()->setBytesToPopOnReturn(BytesToPopOnReturn);
-
- // Return the new list of results.
- std::vector<MVT::ValueType> RetVTs(Op.Val->value_begin(),
- Op.Val->value_end());
- return DAG.getNode(ISD::MERGE_VALUES, RetVTs, &ArgValues[0],ArgValues.size());
-}
-
-
-SDOperand X86TargetLowering::LowerStdCallCCCallTo(SDOperand Op,
- SelectionDAG &DAG) {
- SDOperand Chain = Op.getOperand(0);
- unsigned CallingConv= cast<ConstantSDNode>(Op.getOperand(1))->getValue();
- bool isVarArg = cast<ConstantSDNode>(Op.getOperand(2))->getValue() != 0;
- bool isTailCall = cast<ConstantSDNode>(Op.getOperand(3))->getValue() != 0;
- SDOperand Callee = Op.getOperand(4);
- MVT::ValueType RetVT= Op.Val->getValueType(0);
- unsigned NumOps = (Op.getNumOperands() - 5) / 2;
-
- // Count how many bytes are to be pushed on the stack.
- unsigned NumBytes = 0;
- for (unsigned i = 0; i != NumOps; ++i) {
- SDOperand Arg = Op.getOperand(5+2*i);
-
- switch (Arg.getValueType()) {
- default: assert(0 && "Unexpected ValueType for argument!");
- case MVT::i8:
- case MVT::i16:
- case MVT::i32:
- case MVT::f32:
- NumBytes += 4;
- break;
- case MVT::i64:
- case MVT::f64:
- NumBytes += 8;
- break;
- }
- }
-
- Chain = DAG.getCALLSEQ_START(Chain,DAG.getConstant(NumBytes, getPointerTy()));
-
- // Arguments go on the stack in reverse order, as specified by the ABI.
- unsigned ArgOffset = 0;
- std::vector<SDOperand> MemOpChains;
- SDOperand StackPtr = DAG.getRegister(X86StackPtr, getPointerTy());
- for (unsigned i = 0; i != NumOps; ++i) {
- SDOperand Arg = Op.getOperand(5+2*i);
-
- switch (Arg.getValueType()) {
- default: assert(0 && "Unexpected ValueType for argument!");
- case MVT::i8:
- case MVT::i16: {
- // Promote the integer to 32 bits. If the input type is signed use a
- // sign extend, otherwise use a zero extend.
- unsigned ExtOp =
- dyn_cast<ConstantSDNode>(Op.getOperand(5+2*i+1))->getValue() ?
- ISD::SIGN_EXTEND : ISD::ZERO_EXTEND;
- Arg = DAG.getNode(ExtOp, MVT::i32, Arg);
- }
- // Fallthrough
-
- case MVT::i32:
- case MVT::f32: {
- SDOperand PtrOff = DAG.getConstant(ArgOffset, getPointerTy());
- PtrOff = DAG.getNode(ISD::ADD, getPointerTy(), StackPtr, PtrOff);
- MemOpChains.push_back(DAG.getStore(Chain, Arg, PtrOff, NULL, 0));
- ArgOffset += 4;
- break;
- }
- case MVT::i64:
- case MVT::f64: {
- SDOperand PtrOff = DAG.getConstant(ArgOffset, getPointerTy());
- PtrOff = DAG.getNode(ISD::ADD, getPointerTy(), StackPtr, PtrOff);
- MemOpChains.push_back(DAG.getStore(Chain, Arg, PtrOff, NULL, 0));
- ArgOffset += 8;
- break;
- }
- }
- }
-
- if (!MemOpChains.empty())
- Chain = DAG.getNode(ISD::TokenFactor, MVT::Other,
- &MemOpChains[0], MemOpChains.size());
-
- // If the callee is a GlobalAddress node (quite common, every direct call is)
- // turn it into a TargetGlobalAddress node so that legalize doesn't hack it.
- if (GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee))
- Callee = DAG.getTargetGlobalAddress(G->getGlobal(), getPointerTy());
- else if (ExternalSymbolSDNode *S = dyn_cast<ExternalSymbolSDNode>(Callee))
- Callee = DAG.getTargetExternalSymbol(S->getSymbol(), getPointerTy());
-
- std::vector<MVT::ValueType> NodeTys;
- NodeTys.push_back(MVT::Other); // Returns a chain
- NodeTys.push_back(MVT::Flag); // Returns a flag for retval copy to use.
- std::vector<SDOperand> Ops;
- Ops.push_back(Chain);
- Ops.push_back(Callee);
-
- Chain = DAG.getNode(isTailCall ? X86ISD::TAILCALL : X86ISD::CALL,
- NodeTys, &Ops[0], Ops.size());
- SDOperand InFlag = Chain.getValue(1);
-
- // Create the CALLSEQ_END node.
- unsigned NumBytesForCalleeToPush;
-
- if (isVarArg) {
- NumBytesForCalleeToPush = 0;
- } else {
- NumBytesForCalleeToPush = NumBytes;
- }
-
- NodeTys.clear();
- NodeTys.push_back(MVT::Other); // Returns a chain
- if (RetVT != MVT::Other)
- NodeTys.push_back(MVT::Flag); // Returns a flag for retval copy to use.
- Ops.clear();
- Ops.push_back(Chain);
- Ops.push_back(DAG.getConstant(NumBytes, getPointerTy()));
- Ops.push_back(DAG.getConstant(NumBytesForCalleeToPush, getPointerTy()));
- Ops.push_back(InFlag);
- Chain = DAG.getNode(ISD::CALLSEQ_END, NodeTys, &Ops[0], Ops.size());
- if (RetVT != MVT::Other)
- InFlag = Chain.getValue(1);
-
- std::vector<SDOperand> ResultVals;
- NodeTys.clear();
- switch (RetVT) {
- default: assert(0 && "Unknown value type to return!");
- case MVT::Other: break;
- case MVT::i8:
- Chain = DAG.getCopyFromReg(Chain, X86::AL, MVT::i8, InFlag).getValue(1);
- ResultVals.push_back(Chain.getValue(0));
- NodeTys.push_back(MVT::i8);
- break;
- case MVT::i16:
- Chain = DAG.getCopyFromReg(Chain, X86::AX, MVT::i16, InFlag).getValue(1);
- ResultVals.push_back(Chain.getValue(0));
- NodeTys.push_back(MVT::i16);
- break;
- case MVT::i32:
- if (Op.Val->getValueType(1) == MVT::i32) {
- Chain = DAG.getCopyFromReg(Chain, X86::EAX, MVT::i32, InFlag).getValue(1);
- ResultVals.push_back(Chain.getValue(0));
- Chain = DAG.getCopyFromReg(Chain, X86::EDX, MVT::i32,
- Chain.getValue(2)).getValue(1);
- ResultVals.push_back(Chain.getValue(0));
- NodeTys.push_back(MVT::i32);
- } else {
- Chain = DAG.getCopyFromReg(Chain, X86::EAX, MVT::i32, InFlag).getValue(1);
- ResultVals.push_back(Chain.getValue(0));
- }
- NodeTys.push_back(MVT::i32);
- break;
- case MVT::f32:
- case MVT::f64: {
- std::vector<MVT::ValueType> Tys;
- Tys.push_back(MVT::f64);
- Tys.push_back(MVT::Other);
- Tys.push_back(MVT::Flag);
- std::vector<SDOperand> Ops;
- Ops.push_back(Chain);
- Ops.push_back(InFlag);
- SDOperand RetVal = DAG.getNode(X86ISD::FP_GET_RESULT, Tys,
- &Ops[0], Ops.size());
- Chain = RetVal.getValue(1);
- InFlag = RetVal.getValue(2);
- if (X86ScalarSSE) {
- // FIXME: Currently the FST is flagged to the FP_GET_RESULT. This
- // shouldn't be necessary except that RFP cannot be live across
- // multiple blocks. When stackifier is fixed, they can be uncoupled.
- MachineFunction &MF = DAG.getMachineFunction();
- int SSFI = MF.getFrameInfo()->CreateStackObject(8, 8);
- SDOperand StackSlot = DAG.getFrameIndex(SSFI, getPointerTy());
- Tys.clear();
- Tys.push_back(MVT::Other);
- Ops.clear();
- Ops.push_back(Chain);
- Ops.push_back(RetVal);
- Ops.push_back(StackSlot);
- Ops.push_back(DAG.getValueType(RetVT));
- Ops.push_back(InFlag);
- Chain = DAG.getNode(X86ISD::FST, Tys, &Ops[0], Ops.size());
- RetVal = DAG.getLoad(RetVT, Chain, StackSlot, NULL, 0);
- Chain = RetVal.getValue(1);
- }
-
- if (RetVT == MVT::f32 && !X86ScalarSSE)
- // FIXME: we would really like to remember that this FP_ROUND
- // operation is okay to eliminate if we allow excess FP precision.
- RetVal = DAG.getNode(ISD::FP_ROUND, MVT::f32, RetVal);
- ResultVals.push_back(RetVal);
- NodeTys.push_back(RetVT);
- break;
- }
- }
-
- // If the function returns void, just return the chain.
- if (ResultVals.empty())
- return Chain;
-
- // Otherwise, merge everything together with a MERGE_VALUES node.
- NodeTys.push_back(MVT::Other);
- ResultVals.push_back(Chain);
- SDOperand Res = DAG.getNode(ISD::MERGE_VALUES, NodeTys,
- &ResultVals[0], ResultVals.size());
- return Res.getValue(Op.ResNo);
-}
-
-//===----------------------------------------------------------------------===//
-// FastCall Calling Convention implementation
-//===----------------------------------------------------------------------===//
-//
-// The X86 'fastcall' calling convention passes up to two integer arguments in
-// registers (an appropriate portion of ECX/EDX), passes arguments in C order,
-// and requires that the callee pop its arguments off the stack (allowing proper
-// tail calls), and has the same return value conventions as C calling convs.
-//
-// This calling convention always arranges for the callee pop value to be 8n+4
-// bytes, which is needed for tail recursion elimination and stack alignment
-// reasons.
-//
-
-/// HowToPassFastCallCCArgument - Returns how an formal argument of the
-/// specified type should be passed. If it is through stack, returns the size of
-/// the stack slot; if it is through integer register, returns the number of
-/// integer registers are needed.
-static void
-HowToPassFastCallCCArgument(MVT::ValueType ObjectVT,
- unsigned NumIntRegs,
- unsigned &ObjSize,
- unsigned &ObjIntRegs)
-{
- ObjSize = 0;
- ObjIntRegs = 0;
-
- switch (ObjectVT) {
- default: assert(0 && "Unhandled argument type!");
- case MVT::i8:
- if (NumIntRegs < 2)
- ObjIntRegs = 1;
- else
- ObjSize = 1;
- break;
- case MVT::i16:
- if (NumIntRegs < 2)
- ObjIntRegs = 1;
- else
- ObjSize = 2;
- break;
- case MVT::i32:
- if (NumIntRegs < 2)
- ObjIntRegs = 1;
- else
- ObjSize = 4;
- break;
- case MVT::i64:
- if (NumIntRegs+2 <= 2) {
- ObjIntRegs = 2;
- } else if (NumIntRegs+1 <= 2) {
- ObjIntRegs = 1;
- ObjSize = 4;
- } else
- ObjSize = 8;
- case MVT::f32:
- ObjSize = 4;
- break;
- case MVT::f64:
- ObjSize = 8;
- break;
- }
-}
-
-SDOperand
-X86TargetLowering::LowerFastCallCCArguments(SDOperand Op, SelectionDAG &DAG) {
- unsigned NumArgs = Op.Val->getNumValues()-1;
- MachineFunction &MF = DAG.getMachineFunction();
- MachineFrameInfo *MFI = MF.getFrameInfo();
- SDOperand Root = Op.getOperand(0);
- std::vector<SDOperand> ArgValues;
-
- // Add DAG nodes to load the arguments... On entry to a function the stack
- // frame looks like this:
- //
- // [ESP] -- return address
- // [ESP + 4] -- first nonreg argument (leftmost lexically)
- // [ESP + 8] -- second nonreg argument, if 1st argument is <= 4 bytes in size
- // ...
- unsigned ArgOffset = 0; // Frame mechanisms handle retaddr slot
-
- // Keep track of the number of integer regs passed so far. This can be either
- // 0 (neither ECX or EDX used), 1 (ECX is used) or 2 (ECX and EDX are both
- // used).
- unsigned NumIntRegs = 0;
-
- for (unsigned i = 0; i < NumArgs; ++i) {
- MVT::ValueType ObjectVT = Op.getValue(i).getValueType();
- unsigned ArgIncrement = 4;
- unsigned ObjSize = 0;
- unsigned ObjIntRegs = 0;
-
- HowToPassFastCallCCArgument(ObjectVT, NumIntRegs, ObjSize, ObjIntRegs);
- if (ObjSize > 4)
- ArgIncrement = ObjSize;
-
- unsigned Reg = 0;
- SDOperand ArgValue;
- if (ObjIntRegs) {
- switch (ObjectVT) {
- default: assert(0 && "Unhandled argument type!");
- case MVT::i8:
- Reg = AddLiveIn(MF, NumIntRegs ? X86::DL : X86::CL,
- X86::GR8RegisterClass);
- ArgValue = DAG.getCopyFromReg(Root, Reg, MVT::i8);
- break;
- case MVT::i16:
- Reg = AddLiveIn(MF, NumIntRegs ? X86::DX : X86::CX,
- X86::GR16RegisterClass);
- ArgValue = DAG.getCopyFromReg(Root, Reg, MVT::i16);
- break;
- case MVT::i32:
- Reg = AddLiveIn(MF, NumIntRegs ? X86::EDX : X86::ECX,
- X86::GR32RegisterClass);
- ArgValue = DAG.getCopyFromReg(Root, Reg, MVT::i32);
- break;
- case MVT::i64:
- Reg = AddLiveIn(MF, NumIntRegs ? X86::EDX : X86::ECX,
- X86::GR32RegisterClass);
- ArgValue = DAG.getCopyFromReg(Root, Reg, MVT::i32);
- if (ObjIntRegs == 2) {
- Reg = AddLiveIn(MF, X86::EDX, X86::GR32RegisterClass);
- SDOperand ArgValue2 = DAG.getCopyFromReg(Root, Reg, MVT::i32);
- ArgValue= DAG.getNode(ISD::BUILD_PAIR, MVT::i64, ArgValue, ArgValue2);
- }
- break;
- }
-
- NumIntRegs += ObjIntRegs;
- }
-
- if (ObjSize) {
- // Create the SelectionDAG nodes corresponding to a load from this
- // parameter.
- int FI = MFI->CreateFixedObject(ObjSize, ArgOffset);
- SDOperand FIN = DAG.getFrameIndex(FI, getPointerTy());
- if (ObjectVT == MVT::i64 && ObjIntRegs) {
- SDOperand ArgValue2 = DAG.getLoad(Op.Val->getValueType(i), Root, FIN,
- NULL, 0);
- ArgValue = DAG.getNode(ISD::BUILD_PAIR, MVT::i64, ArgValue, ArgValue2);
- } else
- ArgValue = DAG.getLoad(Op.Val->getValueType(i), Root, FIN, NULL, 0);
- ArgOffset += ArgIncrement; // Move on to the next argument.
- }
-
- ArgValues.push_back(ArgValue);
- }
-
- ArgValues.push_back(Root);
-
- // Make sure the instruction takes 8n+4 bytes to make sure the start of the
- // arguments and the arguments after the retaddr has been pushed are aligned.
- if ((ArgOffset & 7) == 0)
- ArgOffset += 4;
-
- VarArgsFrameIndex = 0xAAAAAAA; // fastcc functions can't have varargs.
- RegSaveFrameIndex = 0xAAAAAAA; // X86-64 only.
- ReturnAddrIndex = 0; // No return address slot generated yet.
- BytesToPopOnReturn = ArgOffset; // Callee pops all stack arguments.
- BytesCallerReserves = 0;
-
- MF.getInfo<X86FunctionInfo>()->setBytesToPopOnReturn(BytesToPopOnReturn);
+ Ops.push_back(Chain);
+ Ops.push_back(DAG.getConstant(NumBytes, getPointerTy()));
+ Ops.push_back(DAG.getConstant(NumBytes, getPointerTy()));
+ Ops.push_back(InFlag);
+ Chain = DAG.getNode(ISD::CALLSEQ_END, NodeTys, &Ops[0], Ops.size());
+ if (RetVT != MVT::Other)
+ InFlag = Chain.getValue(1);
- // Finally, inform the code generator which regs we return values in.
- switch (getValueType(MF.getFunction()->getReturnType())) {
- default: assert(0 && "Unknown type!");
- case MVT::isVoid: break;
- case MVT::i1:
+ std::vector<SDOperand> ResultVals;
+ NodeTys.clear();
+ switch (RetVT) {
+ default: assert(0 && "Unknown value type to return!");
+ case MVT::Other: break;
case MVT::i8:
+ Chain = DAG.getCopyFromReg(Chain, X86::AL, MVT::i8, InFlag).getValue(1);
+ ResultVals.push_back(Chain.getValue(0));
+ NodeTys.push_back(MVT::i8);
+ break;
case MVT::i16:
- case MVT::i32:
- MF.addLiveOut(X86::ECX);
+ Chain = DAG.getCopyFromReg(Chain, X86::AX, MVT::i16, InFlag).getValue(1);
+ ResultVals.push_back(Chain.getValue(0));
+ NodeTys.push_back(MVT::i16);
break;
- case MVT::i64:
- MF.addLiveOut(X86::ECX);
- MF.addLiveOut(X86::EDX);
+ case MVT::i32:
+ if (Op.Val->getValueType(1) == MVT::i32) {
+ Chain = DAG.getCopyFromReg(Chain, X86::EAX, MVT::i32, InFlag).getValue(1);
+ ResultVals.push_back(Chain.getValue(0));
+ Chain = DAG.getCopyFromReg(Chain, X86::EDX, MVT::i32,
+ Chain.getValue(2)).getValue(1);
+ ResultVals.push_back(Chain.getValue(0));
+ NodeTys.push_back(MVT::i32);
+ } else {
+ Chain = DAG.getCopyFromReg(Chain, X86::EAX, MVT::i32, InFlag).getValue(1);
+ ResultVals.push_back(Chain.getValue(0));
+ }
+ NodeTys.push_back(MVT::i32);
break;
+ case MVT::v16i8:
+ case MVT::v8i16:
+ case MVT::v4i32:
+ case MVT::v2i64:
+ case MVT::v4f32:
+ case MVT::v2f64:
+ if (isFastCall) {
+ assert(0 && "Unknown value type to return!");
+ } else {
+ Chain = DAG.getCopyFromReg(Chain, X86::XMM0, RetVT, InFlag).getValue(1);
+ ResultVals.push_back(Chain.getValue(0));
+ NodeTys.push_back(RetVT);
+ }
+ break;
case MVT::f32:
- case MVT::f64:
- MF.addLiveOut(X86::ST0);
+ case MVT::f64: {
+ std::vector<MVT::ValueType> Tys;
+ Tys.push_back(MVT::f64);
+ Tys.push_back(MVT::Other);
+ Tys.push_back(MVT::Flag);
+ std::vector<SDOperand> Ops;
+ Ops.push_back(Chain);
+ Ops.push_back(InFlag);
+ SDOperand RetVal = DAG.getNode(X86ISD::FP_GET_RESULT, Tys,
+ &Ops[0], Ops.size());
+ Chain = RetVal.getValue(1);
+ InFlag = RetVal.getValue(2);
+ if (X86ScalarSSE) {
+ // FIXME: Currently the FST is flagged to the FP_GET_RESULT. This
+ // shouldn't be necessary except that RFP cannot be live across
+ // multiple blocks. When stackifier is fixed, they can be uncoupled.
+ MachineFunction &MF = DAG.getMachineFunction();
+ int SSFI = MF.getFrameInfo()->CreateStackObject(8, 8);
+ SDOperand StackSlot = DAG.getFrameIndex(SSFI, getPointerTy());
+ Tys.clear();
+ Tys.push_back(MVT::Other);
+ Ops.clear();
+ Ops.push_back(Chain);
+ Ops.push_back(RetVal);
+ Ops.push_back(StackSlot);
+ Ops.push_back(DAG.getValueType(RetVT));
+ Ops.push_back(InFlag);
+ Chain = DAG.getNode(X86ISD::FST, Tys, &Ops[0], Ops.size());
+ RetVal = DAG.getLoad(RetVT, Chain, StackSlot, NULL, 0);
+ Chain = RetVal.getValue(1);
+ }
+
+ if (RetVT == MVT::f32 && !X86ScalarSSE)
+ // FIXME: we would really like to remember that this FP_ROUND
+ // operation is okay to eliminate if we allow excess FP precision.
+ RetVal = DAG.getNode(ISD::FP_ROUND, MVT::f32, RetVal);
+ ResultVals.push_back(RetVal);
+ NodeTys.push_back(RetVT);
break;
}
+ }
- // Return the new list of results.
- std::vector<MVT::ValueType> RetVTs(Op.Val->value_begin(),
- Op.Val->value_end());
- return DAG.getNode(ISD::MERGE_VALUES, RetVTs, &ArgValues[0],ArgValues.size());
+
+ // If the function returns void, just return the chain.
+ if (ResultVals.empty())
+ return Chain;
+
+ // Otherwise, merge everything together with a MERGE_VALUES node.
+ NodeTys.push_back(MVT::Other);
+ ResultVals.push_back(Chain);
+ SDOperand Res = DAG.getNode(ISD::MERGE_VALUES, NodeTys,
+ &ResultVals[0], ResultVals.size());
+ return Res.getValue(Op.ResNo);
}
SDOperand X86TargetLowering::getReturnAddressFrameIndex(SelectionDAG &DAG) {
-std::pair<SDOperand, SDOperand> X86TargetLowering::
-LowerFrameReturnAddress(bool isFrameAddress, SDOperand Chain, unsigned Depth,
- SelectionDAG &DAG) {
- SDOperand Result;
- if (Depth) // Depths > 0 not supported yet!
- Result = DAG.getConstant(0, getPointerTy());
- else {
- SDOperand RetAddrFI = getReturnAddressFrameIndex(DAG);
- if (!isFrameAddress)
- // Just load the return address
- Result = DAG.getLoad(getPointerTy(), DAG.getEntryNode(), RetAddrFI,
- NULL, 0);
- else
- Result = DAG.getNode(ISD::SUB, getPointerTy(), RetAddrFI,
- DAG.getConstant(4, getPointerTy()));
- }
- return std::make_pair(Result, Chain);
-}
-
/// translateX86CC - do a one to one translation of a ISD::CondCode to the X86
/// specific condition code. It returns a false if it cannot do a direct
/// translation. X86CC is the translated CondCode. LHS/RHS are modified as
return true;
}
}
-
+
switch (SetCCOpcode) {
default: break;
case ISD::SETEQ: X86CC = X86::COND_E; break;
}
}
-/// DarwinGVRequiresExtraLoad - true if accessing the GV requires an extra
-/// load. For Darwin, external and weak symbols are indirect, loading the value
-/// at address GV rather then the value of GV itself. This means that the
-/// GlobalAddress must be in the base or index register of the address, not the
-/// GV offset field.
-static bool DarwinGVRequiresExtraLoad(GlobalValue *GV) {
- return (GV->hasWeakLinkage() || GV->hasLinkOnceLinkage() ||
- (GV->isExternal() && !GV->hasNotBeenReadFromBytecode()));
-}
-
-/// WindowsGVRequiresExtraLoad - true if accessing the GV requires an extra
-/// load. For Windows, dllimported symbols are indirect, loading the value at
-/// address GV rather then the value of GV itself. This means that the
-/// GlobalAddress must be in the base or index register of the address, not the
-/// GV offset field.
-static bool WindowsGVRequiresExtraLoad(GlobalValue *GV) {
- return (GV->hasDLLImportLinkage());
-}
-
/// isUndefOrInRange - Op is either an undef node or a ConstantSDNode. Return
/// true if Op is undef or if its value falls within the specified range (L, H].
static bool isUndefOrInRange(SDOperand Op, unsigned Low, unsigned Hi) {
isUndefOrEqual(N->getOperand(3), 3);
}
+/// isMOVHLPS_v_undef_Mask - Special case of isMOVHLPSMask for canonical form
+/// of vector_shuffle v, v, <2, 3, 2, 3>, i.e. vector_shuffle v, undef,
+/// <2, 3, 2, 3>
+bool X86::isMOVHLPS_v_undef_Mask(SDNode *N) {
+ assert(N->getOpcode() == ISD::BUILD_VECTOR);
+
+ if (N->getNumOperands() != 4)
+ return false;
+
+ // Expect bit0 == 2, bit1 == 3, bit2 == 2, bit3 == 3
+ return isUndefOrEqual(N->getOperand(0), 2) &&
+ isUndefOrEqual(N->getOperand(1), 3) &&
+ isUndefOrEqual(N->getOperand(2), 2) &&
+ isUndefOrEqual(N->getOperand(3), 3);
+}
+
/// isMOVLPMask - Return true if the specified VECTOR_SHUFFLE operand
/// specifies a shuffle of elements that is suitable for input to MOVLP{S|D}.
bool X86::isMOVLPMask(SDNode *N) {
unsigned i = 0;
for (; i != NumElems; ++i) {
SDOperand Elt = N->getOperand(i);
- if (ConstantSDNode *EltV = dyn_cast<ConstantSDNode>(Elt)) {
+ if (isa<ConstantSDNode>(Elt)) {
ElementBase = Elt;
break;
}
bool X86::isSplatLoMask(SDNode *N) {
assert(N->getOpcode() == ISD::BUILD_VECTOR);
- for (unsigned i = 0, e = N->getNumOperands(); i < e; ++i)
+ for (unsigned i = 0, e = N->getNumOperands(); i < e; ++i)
if (!isUndefOrEqual(N->getOperand(i), 0))
return false;
return true;
/// ShouldXformToMOVHLPS - Return true if the node should be transformed to
/// match movhlps. The lower half elements should come from upper half of
/// V1 (and in order), and the upper half elements should come from the upper
-/// half of V2 (and in order).
+/// half of V2 (and in order).
static bool ShouldXformToMOVHLPS(SDNode *Mask) {
unsigned NumElems = Mask->getNumOperands();
if (NumElems != 4)
}
// Take advantage of the fact GR32 to VR128 scalar_to_vector (i.e. movd)
- // clears the upper bits.
+ // clears the upper bits.
// FIXME: we can do the same for v4f32 case when we know both parts of
// the lower half come from scalar_to_vector (loadf32). We should do
// that in post legalizer dag combiner with target specific hooks.
if (X86::isMOVLMask(PermMask.Val))
return (V1IsUndef) ? V2 : Op;
-
+
if (X86::isMOVSHDUPMask(PermMask.Val) ||
X86::isMOVSLDUPMask(PermMask.Val) ||
X86::isMOVHLPSMask(PermMask.Val) ||
if (V2IsSplat) {
// Normalize mask so all entries that point to V2 points to its first
- // element then try to match unpck{h|l} again. If match, return a
+ // element then try to match unpck{h|l} again. If match, return a
// new vector_shuffle with the corrected mask.
SDOperand NewMask = NormalizeMask(PermMask, DAG);
if (NewMask.Val != PermMask.Val) {
DAG.getNode(ISD::VECTOR_SHUFFLE, VT, V1, V2,
DAG.getNode(ISD::BUILD_VECTOR, MaskVT,
&LoMask[0], LoMask.size()));
- SDOperand HiShuffle =
+ SDOperand HiShuffle =
DAG.getNode(ISD::VECTOR_SHUFFLE, VT, V1, V2,
DAG.getNode(ISD::BUILD_VECTOR, MaskVT,
&HiMask[0], HiMask.size()));
SDOperand Mask = DAG.getNode(ISD::BUILD_VECTOR, MaskVT,
&IdxVec[0], IdxVec.size());
Vec = DAG.getNode(ISD::VECTOR_SHUFFLE, Vec.getValueType(),
- Vec, Vec, Mask);
+ Vec, DAG.getNode(ISD::UNDEF, Vec.getValueType()), Mask);
return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, VT, Vec,
DAG.getConstant(0, getPointerTy()));
} else if (MVT::getSizeInBits(VT) == 64) {
return DAG.getNode(X86ISD::S2VEC, Op.getValueType(), AnyExt);
}
-// ConstantPool, JumpTable, GlobalAddress, and ExternalSymbol are lowered as
+// ConstantPool, JumpTable, GlobalAddress, and ExternalSymbol are lowered as
// their target countpart wrapped in the X86ISD::Wrapper node. Suppose N is
// one of the above mentioned nodes. It has to be wrapped because otherwise
// Select(N) returns N. So the raw TargetGlobalAddress nodes, etc. can only
SDOperand
X86TargetLowering::LowerConstantPool(SDOperand Op, SelectionDAG &DAG) {
ConstantPoolSDNode *CP = cast<ConstantPoolSDNode>(Op);
- SDOperand Result = DAG.getNode(X86ISD::Wrapper, getPointerTy(),
- DAG.getTargetConstantPool(CP->getConstVal(),
- getPointerTy(),
- CP->getAlignment()));
- if (Subtarget->isTargetDarwin()) {
- // With PIC, the address is actually $g + Offset.
- if (!Subtarget->is64Bit() &&
- getTargetMachine().getRelocationModel() == Reloc::PIC_)
- Result = DAG.getNode(ISD::ADD, getPointerTy(),
- DAG.getNode(X86ISD::GlobalBaseReg, getPointerTy()), Result);
+ SDOperand Result = DAG.getTargetConstantPool(CP->getConstVal(),
+ getPointerTy(),
+ CP->getAlignment());
+ Result = DAG.getNode(X86ISD::Wrapper, getPointerTy(), Result);
+ // With PIC, the address is actually $g + Offset.
+ if (getTargetMachine().getRelocationModel() == Reloc::PIC_ &&
+ !Subtarget->isPICStyleRIPRel()) {
+ Result = DAG.getNode(ISD::ADD, getPointerTy(),
+ DAG.getNode(X86ISD::GlobalBaseReg, getPointerTy()),
+ Result);
}
return Result;
SDOperand
X86TargetLowering::LowerGlobalAddress(SDOperand Op, SelectionDAG &DAG) {
GlobalValue *GV = cast<GlobalAddressSDNode>(Op)->getGlobal();
- SDOperand Result = DAG.getNode(X86ISD::Wrapper, getPointerTy(),
- DAG.getTargetGlobalAddress(GV,
- getPointerTy()));
- if (Subtarget->isTargetDarwin()) {
- // With PIC, the address is actually $g + Offset.
- if (!Subtarget->is64Bit() &&
- getTargetMachine().getRelocationModel() == Reloc::PIC_)
- Result = DAG.getNode(ISD::ADD, getPointerTy(),
- DAG.getNode(X86ISD::GlobalBaseReg, getPointerTy()),
- Result);
-
- // For Darwin, external and weak symbols are indirect, so we want to load
- // the value at address GV, not the value of GV itself. This means that
- // the GlobalAddress must be in the base or index register of the address,
- // not the GV offset field.
- if (getTargetMachine().getRelocationModel() != Reloc::Static &&
- DarwinGVRequiresExtraLoad(GV))
- Result = DAG.getLoad(getPointerTy(), DAG.getEntryNode(), Result, NULL, 0);
- } else if (Subtarget->isTargetCygwin() || Subtarget->isTargetWindows()) {
- // FIXME: What about PIC?
- if (WindowsGVRequiresExtraLoad(GV))
- Result = DAG.getLoad(getPointerTy(), DAG.getEntryNode(), Result, NULL, 0);
+ SDOperand Result = DAG.getTargetGlobalAddress(GV, getPointerTy());
+ Result = DAG.getNode(X86ISD::Wrapper, getPointerTy(), Result);
+ // With PIC, the address is actually $g + Offset.
+ if (getTargetMachine().getRelocationModel() == Reloc::PIC_ &&
+ !Subtarget->isPICStyleRIPRel()) {
+ Result = DAG.getNode(ISD::ADD, getPointerTy(),
+ DAG.getNode(X86ISD::GlobalBaseReg, getPointerTy()),
+ Result);
}
+ // For Darwin & Mingw32, external and weak symbols are indirect, so we want to
+ // load the value at address GV, not the value of GV itself. This means that
+ // the GlobalAddress must be in the base or index register of the address, not
+ // the GV offset field. Platform check is inside GVRequiresExtraLoad() call
+ // The same applies for external symbols during PIC codegen
+ if (Subtarget->GVRequiresExtraLoad(GV, getTargetMachine(), false))
+ Result = DAG.getLoad(getPointerTy(), DAG.getEntryNode(), Result, NULL, 0);
return Result;
}
SDOperand
X86TargetLowering::LowerExternalSymbol(SDOperand Op, SelectionDAG &DAG) {
const char *Sym = cast<ExternalSymbolSDNode>(Op)->getSymbol();
- SDOperand Result = DAG.getNode(X86ISD::Wrapper, getPointerTy(),
- DAG.getTargetExternalSymbol(Sym,
- getPointerTy()));
- if (Subtarget->isTargetDarwin()) {
- // With PIC, the address is actually $g + Offset.
- if (!Subtarget->is64Bit() &&
- getTargetMachine().getRelocationModel() == Reloc::PIC_)
- Result = DAG.getNode(ISD::ADD, getPointerTy(),
- DAG.getNode(X86ISD::GlobalBaseReg, getPointerTy()),
- Result);
+ SDOperand Result = DAG.getTargetExternalSymbol(Sym, getPointerTy());
+ Result = DAG.getNode(X86ISD::Wrapper, getPointerTy(), Result);
+ // With PIC, the address is actually $g + Offset.
+ if (getTargetMachine().getRelocationModel() == Reloc::PIC_ &&
+ !Subtarget->isPICStyleRIPRel()) {
+ Result = DAG.getNode(ISD::ADD, getPointerTy(),
+ DAG.getNode(X86ISD::GlobalBaseReg, getPointerTy()),
+ Result);
+ }
+
+ return Result;
+}
+
+SDOperand X86TargetLowering::LowerJumpTable(SDOperand Op, SelectionDAG &DAG) {
+ JumpTableSDNode *JT = cast<JumpTableSDNode>(Op);
+ SDOperand Result = DAG.getTargetJumpTable(JT->getIndex(), getPointerTy());
+ Result = DAG.getNode(X86ISD::Wrapper, getPointerTy(), Result);
+ // With PIC, the address is actually $g + Offset.
+ if (getTargetMachine().getRelocationModel() == Reloc::PIC_ &&
+ !Subtarget->isPICStyleRIPRel()) {
+ Result = DAG.getNode(ISD::ADD, getPointerTy(),
+ DAG.getNode(X86ISD::GlobalBaseReg, getPointerTy()),
+ Result);
}
return Result;
return DAG.getNode(X86ISD::FXOR, VT, Op.getOperand(0), Mask);
}
+SDOperand X86TargetLowering::LowerFCOPYSIGN(SDOperand Op, SelectionDAG &DAG) {
+ SDOperand Op0 = Op.getOperand(0);
+ SDOperand Op1 = Op.getOperand(1);
+ MVT::ValueType VT = Op.getValueType();
+ MVT::ValueType SrcVT = Op1.getValueType();
+ const Type *SrcTy = MVT::getTypeForValueType(SrcVT);
+
+ // If second operand is smaller, extend it first.
+ if (MVT::getSizeInBits(SrcVT) < MVT::getSizeInBits(VT)) {
+ Op1 = DAG.getNode(ISD::FP_EXTEND, VT, Op1);
+ SrcVT = VT;
+ }
+
+ // First get the sign bit of second operand.
+ std::vector<Constant*> CV;
+ if (SrcVT == MVT::f64) {
+ CV.push_back(ConstantFP::get(SrcTy, BitsToDouble(1ULL << 63)));
+ CV.push_back(ConstantFP::get(SrcTy, 0.0));
+ } else {
+ CV.push_back(ConstantFP::get(SrcTy, BitsToFloat(1U << 31)));
+ CV.push_back(ConstantFP::get(SrcTy, 0.0));
+ CV.push_back(ConstantFP::get(SrcTy, 0.0));
+ CV.push_back(ConstantFP::get(SrcTy, 0.0));
+ }
+ Constant *CS = ConstantStruct::get(CV);
+ SDOperand CPIdx = DAG.getConstantPool(CS, getPointerTy(), 4);
+ std::vector<MVT::ValueType> Tys;
+ Tys.push_back(SrcVT);
+ Tys.push_back(MVT::Other);
+ SmallVector<SDOperand, 3> Ops;
+ Ops.push_back(DAG.getEntryNode());
+ Ops.push_back(CPIdx);
+ Ops.push_back(DAG.getSrcValue(NULL));
+ SDOperand Mask1 = DAG.getNode(X86ISD::LOAD_PACK, Tys, &Ops[0], Ops.size());
+ SDOperand SignBit = DAG.getNode(X86ISD::FAND, SrcVT, Op1, Mask1);
+
+ // Shift sign bit right or left if the two operands have different types.
+ if (MVT::getSizeInBits(SrcVT) > MVT::getSizeInBits(VT)) {
+ // Op0 is MVT::f32, Op1 is MVT::f64.
+ SignBit = DAG.getNode(ISD::SCALAR_TO_VECTOR, MVT::v2f64, SignBit);
+ SignBit = DAG.getNode(X86ISD::FSRL, MVT::v2f64, SignBit,
+ DAG.getConstant(32, MVT::i32));
+ SignBit = DAG.getNode(ISD::BIT_CONVERT, MVT::v4f32, SignBit);
+ SignBit = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, MVT::f32, SignBit,
+ DAG.getConstant(0, getPointerTy()));
+ }
+
+ // Clear first operand sign bit.
+ CV.clear();
+ if (VT == MVT::f64) {
+ CV.push_back(ConstantFP::get(SrcTy, BitsToDouble(~(1ULL << 63))));
+ CV.push_back(ConstantFP::get(SrcTy, 0.0));
+ } else {
+ CV.push_back(ConstantFP::get(SrcTy, BitsToFloat(~(1U << 31))));
+ CV.push_back(ConstantFP::get(SrcTy, 0.0));
+ CV.push_back(ConstantFP::get(SrcTy, 0.0));
+ CV.push_back(ConstantFP::get(SrcTy, 0.0));
+ }
+ CS = ConstantStruct::get(CV);
+ CPIdx = DAG.getConstantPool(CS, getPointerTy(), 4);
+ Tys.clear();
+ Tys.push_back(VT);
+ Tys.push_back(MVT::Other);
+ Ops.clear();
+ Ops.push_back(DAG.getEntryNode());
+ Ops.push_back(CPIdx);
+ Ops.push_back(DAG.getSrcValue(NULL));
+ SDOperand Mask2 = DAG.getNode(X86ISD::LOAD_PACK, Tys, &Ops[0], Ops.size());
+ SDOperand Val = DAG.getNode(X86ISD::FAND, VT, Op0, Mask2);
+
+ // Or the value with the sign bit.
+ return DAG.getNode(X86ISD::FOR, VT, Val, SignBit);
+}
+
SDOperand X86TargetLowering::LowerSETCC(SDOperand Op, SelectionDAG &DAG,
SDOperand Chain) {
assert(Op.getValueType() == MVT::i8 && "SetCC type must be 8-bit integer");
bool isFP = MVT::isFloatingPoint(Op.getOperand(1).getValueType());
unsigned X86CC;
- if (translateX86CC(cast<CondCodeSDNode>(CC)->get(), isFP, X86CC,
+ if (translateX86CC(cast<CondCodeSDNode>(CC)->get(), isFP, X86CC,
Op0, Op1, DAG)) {
SDOperand Ops1[] = { Chain, Op0, Op1 };
Cond = DAG.getNode(X86ISD::CMP, VTs1, 2, Ops1, 3).getValue(1);
Cond, Op.getOperand(2), CC, Cond.getValue(1));
}
-SDOperand X86TargetLowering::LowerJumpTable(SDOperand Op, SelectionDAG &DAG) {
- JumpTableSDNode *JT = cast<JumpTableSDNode>(Op);
- SDOperand Result = DAG.getNode(X86ISD::Wrapper, getPointerTy(),
- DAG.getTargetJumpTable(JT->getIndex(),
- getPointerTy()));
- if (Subtarget->isTargetDarwin()) {
- // With PIC, the address is actually $g + Offset.
- if (!Subtarget->is64Bit() &&
- getTargetMachine().getRelocationModel() == Reloc::PIC_)
- Result = DAG.getNode(ISD::ADD, getPointerTy(),
- DAG.getNode(X86ISD::GlobalBaseReg, getPointerTy()),
- Result);
- }
-
- return Result;
-}
-
SDOperand X86TargetLowering::LowerCALL(SDOperand Op, SelectionDAG &DAG) {
unsigned CallingConv= cast<ConstantSDNode>(Op.getOperand(1))->getValue();
-
+
if (Subtarget->is64Bit())
return LowerX86_64CCCCallTo(Op, DAG);
else
switch (CallingConv) {
default:
- assert(0 && "Unsupported calling convention");
+ assert(0 && "Unsupported calling convention");
case CallingConv::Fast:
if (EnableFastCC) {
- return LowerFastCCCallTo(Op, DAG, false);
+ return LowerFastCCCallTo(Op, DAG);
}
// Falls through
case CallingConv::C:
- case CallingConv::CSRet:
return LowerCCCCallTo(Op, DAG);
- case CallingConv::X86_StdCall:
- return LowerStdCallCCCallTo(Op, DAG);
+ case CallingConv::X86_StdCall:
+ return LowerCCCCallTo(Op, DAG, true);
case CallingConv::X86_FastCall:
return LowerFastCCCallTo(Op, DAG, true);
}
SDOperand X86TargetLowering::LowerRET(SDOperand Op, SelectionDAG &DAG) {
SDOperand Copy;
-
+
switch(Op.getNumOperands()) {
default:
assert(0 && "Do not know how to return this many arguments!");
DAG.getConstant(getBytesToPopOnReturn(), MVT::i16));
case 3: {
MVT::ValueType ArgVT = Op.getOperand(1).getValueType();
-
+
if (MVT::isVector(ArgVT) ||
(Subtarget->is64Bit() && MVT::isFloatingPoint(ArgVT))) {
// Integer or FP vector result -> XMM0.
DAG.getMachineFunction().addLiveOut(Reg2);
}
- Copy = DAG.getCopyToReg(Op.getOperand(0), Reg2, Op.getOperand(3),
+ Copy = DAG.getCopyToReg(Op.getOperand(0), Reg2, Op.getOperand(3),
SDOperand());
Copy = DAG.getCopyToReg(Copy, Reg1, Op.getOperand(1), Copy.getValue(1));
break;
MachineFunction &MF = DAG.getMachineFunction();
const Function* Fn = MF.getFunction();
if (Fn->hasExternalLinkage() &&
- Subtarget->isTargetCygwin() &&
+ Subtarget->isTargetCygMing() &&
Fn->getName() == "main")
MF.getInfo<X86FunctionInfo>()->setForceFramePointer(true);
}
// Falls through
case CallingConv::C:
- case CallingConv::CSRet:
return LowerCCCArguments(Op, DAG);
case CallingConv::X86_StdCall:
MF.getInfo<X86FunctionInfo>()->setDecorationStyle(StdCall);
- return LowerStdCallCCArguments(Op, DAG);
+ return LowerCCCArguments(Op, DAG, true);
case CallingConv::X86_FastCall:
MF.getInfo<X86FunctionInfo>()->setDecorationStyle(FastCall);
- return LowerFastCallCCArguments(Op, DAG);
+ return LowerFastCCArguments(Op, DAG, true);
}
}
(I && I->getValue() < Subtarget->getMinRepStrSizeThreshold())) {
MVT::ValueType IntPtr = getPointerTy();
const Type *IntPtrTy = getTargetData()->getIntPtrType();
- std::vector<std::pair<SDOperand, const Type*> > Args;
- Args.push_back(std::make_pair(Op.getOperand(1), IntPtrTy));
- // Extend the ubyte argument to be an int value for the call.
- SDOperand Val = DAG.getNode(ISD::ZERO_EXTEND, MVT::i32, Op.getOperand(2));
- Args.push_back(std::make_pair(Val, IntPtrTy));
- Args.push_back(std::make_pair(Op.getOperand(3), IntPtrTy));
+ TargetLowering::ArgListTy Args;
+ TargetLowering::ArgListEntry Entry;
+ Entry.Node = Op.getOperand(1);
+ Entry.Ty = IntPtrTy;
+ Entry.isSigned = false;
+ Entry.isInReg = false;
+ Entry.isSRet = false;
+ Args.push_back(Entry);
+ // Extend the unsigned i8 argument to be an int value for the call.
+ Entry.Node = DAG.getNode(ISD::ZERO_EXTEND, MVT::i32, Op.getOperand(2));
+ Entry.Ty = IntPtrTy;
+ Entry.isSigned = false;
+ Entry.isInReg = false;
+ Entry.isSRet = false;
+ Args.push_back(Entry);
+ Entry.Node = Op.getOperand(3);
+ Args.push_back(Entry);
std::pair<SDOperand,SDOperand> CallResult =
- LowerCallTo(Chain, Type::VoidTy, false, CallingConv::C, false,
+ LowerCallTo(Chain, Type::VoidTy, false, false, CallingConv::C, false,
DAG.getExternalSymbol("memset", IntPtr), Args, DAG);
return CallResult.second;
}
if ((Align & 3) != 0 ||
(I && I->getValue() < Subtarget->getMinRepStrSizeThreshold())) {
MVT::ValueType IntPtr = getPointerTy();
- const Type *IntPtrTy = getTargetData()->getIntPtrType();
- std::vector<std::pair<SDOperand, const Type*> > Args;
- Args.push_back(std::make_pair(Op.getOperand(1), IntPtrTy));
- Args.push_back(std::make_pair(Op.getOperand(2), IntPtrTy));
- Args.push_back(std::make_pair(Op.getOperand(3), IntPtrTy));
+ TargetLowering::ArgListTy Args;
+ TargetLowering::ArgListEntry Entry;
+ Entry.Ty = getTargetData()->getIntPtrType();
+ Entry.isSigned = false;
+ Entry.isInReg = false;
+ Entry.isSRet = false;
+ Entry.Node = Op.getOperand(1); Args.push_back(Entry);
+ Entry.Node = Op.getOperand(2); Args.push_back(Entry);
+ Entry.Node = Op.getOperand(3); Args.push_back(Entry);
std::pair<SDOperand,SDOperand> CallResult =
- LowerCallTo(Chain, Type::VoidTy, false, CallingConv::C, false,
+ LowerCallTo(Chain, Type::VoidTy, false, false, CallingConv::C, false,
DAG.getExternalSymbol("memcpy", IntPtr), Args, DAG);
return CallResult.second;
}
Ops.push_back(Op.getOperand(0));
SDOperand rd = DAG.getNode(X86ISD::RDTSC_DAG, Tys, &Ops[0], Ops.size());
Ops.clear();
- Ops.push_back(DAG.getCopyFromReg(rd, X86::EAX, MVT::i32, rd.getValue(1)));
- Ops.push_back(DAG.getCopyFromReg(Ops[0].getValue(1), X86::EDX,
- MVT::i32, Ops[0].getValue(2)));
- Ops.push_back(Ops[1].getValue(1));
- Tys[0] = Tys[1] = MVT::i32;
- Tys.push_back(MVT::Other);
+ if (Subtarget->is64Bit()) {
+ SDOperand Copy1 = DAG.getCopyFromReg(rd, X86::RAX, MVT::i64, rd.getValue(1));
+ SDOperand Copy2 = DAG.getCopyFromReg(Copy1.getValue(1), X86::RDX,
+ MVT::i64, Copy1.getValue(2));
+ SDOperand Tmp = DAG.getNode(ISD::SHL, MVT::i64, Copy2,
+ DAG.getConstant(32, MVT::i8));
+ Ops.push_back(DAG.getNode(ISD::OR, MVT::i64, Copy1, Tmp));
+ Ops.push_back(Copy2.getValue(1));
+ Tys[0] = MVT::i64;
+ Tys[1] = MVT::Other;
+ } else {
+ SDOperand Copy1 = DAG.getCopyFromReg(rd, X86::EAX, MVT::i32, rd.getValue(1));
+ SDOperand Copy2 = DAG.getCopyFromReg(Copy1.getValue(1), X86::EDX,
+ MVT::i32, Copy1.getValue(2));
+ Ops.push_back(Copy1);
+ Ops.push_back(Copy2);
+ Ops.push_back(Copy2.getValue(1));
+ Tys[0] = Tys[1] = MVT::i32;
+ Tys.push_back(MVT::Other);
+ }
return DAG.getNode(ISD::MERGE_VALUES, Tys, &Ops[0], Ops.size());
}
ISD::CondCode CC = ISD::SETCC_INVALID;
switch (IntNo) {
default: break;
- case Intrinsic::x86_sse_comieq_ss:
- case Intrinsic::x86_sse2_comieq_sd:
+ case Intrinsic::x86_sse_comieq_ss:
+ case Intrinsic::x86_sse2_comieq_sd:
Opc = X86ISD::COMI;
CC = ISD::SETEQ;
break;
}
}
+SDOperand X86TargetLowering::LowerRETURNADDR(SDOperand Op, SelectionDAG &DAG) {
+ // Depths > 0 not supported yet!
+ if (cast<ConstantSDNode>(Op.getOperand(0))->getValue() > 0)
+ return SDOperand();
+
+ // Just load the return address
+ SDOperand RetAddrFI = getReturnAddressFrameIndex(DAG);
+ return DAG.getLoad(getPointerTy(), DAG.getEntryNode(), RetAddrFI, NULL, 0);
+}
+
+SDOperand X86TargetLowering::LowerFRAMEADDR(SDOperand Op, SelectionDAG &DAG) {
+ // Depths > 0 not supported yet!
+ if (cast<ConstantSDNode>(Op.getOperand(0))->getValue() > 0)
+ return SDOperand();
+
+ SDOperand RetAddrFI = getReturnAddressFrameIndex(DAG);
+ return DAG.getNode(ISD::SUB, getPointerTy(), RetAddrFI,
+ DAG.getConstant(4, getPointerTy()));
+}
+
/// LowerOperation - Provide custom lowering hooks for some operations.
///
SDOperand X86TargetLowering::LowerOperation(SDOperand Op, SelectionDAG &DAG) {
case ISD::FP_TO_SINT: return LowerFP_TO_SINT(Op, DAG);
case ISD::FABS: return LowerFABS(Op, DAG);
case ISD::FNEG: return LowerFNEG(Op, DAG);
+ case ISD::FCOPYSIGN: return LowerFCOPYSIGN(Op, DAG);
case ISD::SETCC: return LowerSETCC(Op, DAG, DAG.getEntryNode());
case ISD::SELECT: return LowerSELECT(Op, DAG);
case ISD::BRCOND: return LowerBRCOND(Op, DAG);
case ISD::READCYCLECOUNTER: return LowerREADCYCLCECOUNTER(Op, DAG);
case ISD::VASTART: return LowerVASTART(Op, DAG);
case ISD::INTRINSIC_WO_CHAIN: return LowerINTRINSIC_WO_CHAIN(Op, DAG);
+ case ISD::RETURNADDR: return LowerRETURNADDR(Op, DAG);
+ case ISD::FRAMEADDR: return LowerFRAMEADDR(Op, DAG);
}
}
case X86ISD::SHLD: return "X86ISD::SHLD";
case X86ISD::SHRD: return "X86ISD::SHRD";
case X86ISD::FAND: return "X86ISD::FAND";
+ case X86ISD::FOR: return "X86ISD::FOR";
case X86ISD::FXOR: return "X86ISD::FXOR";
+ case X86ISD::FSRL: return "X86ISD::FSRL";
case X86ISD::FILD: return "X86ISD::FILD";
case X86ISD::FILD_FLAG: return "X86ISD::FILD_FLAG";
case X86ISD::FP_TO_INT16_IN_MEM: return "X86ISD::FP_TO_INT16_IN_MEM";
case X86ISD::S2VEC: return "X86ISD::S2VEC";
case X86ISD::PEXTRW: return "X86ISD::PEXTRW";
case X86ISD::PINSRW: return "X86ISD::PINSRW";
+ case X86ISD::FMAX: return "X86ISD::FMAX";
+ case X86ISD::FMIN: return "X86ISD::FMIN";
}
}
}
bool X86TargetLowering::isLegalAddressImmediate(GlobalValue *GV) const {
- // GV is 64-bit but displacement field is 32-bit unless we are in small code
- // model. Mac OS X happens to support only small PIC code model.
- // FIXME: better support for other OS's.
- if (Subtarget->is64Bit() && !Subtarget->isTargetDarwin())
+ // In 64-bit mode, GV is 64-bit so it won't fit in the 32-bit displacement
+ // field unless we are in small code model.
+ if (Subtarget->is64Bit() &&
+ getTargetMachine().getCodeModel() != CodeModel::Small)
return false;
- if (Subtarget->isTargetDarwin()) {
- Reloc::Model RModel = getTargetMachine().getRelocationModel();
- if (RModel == Reloc::Static)
- return true;
- else if (RModel == Reloc::DynamicNoPIC)
- return !DarwinGVRequiresExtraLoad(GV);
- else
- return false;
- } else
- return true;
+
+ return (!Subtarget->GVRequiresExtraLoad(GV, getTargetMachine(), false));
}
/// isShuffleMaskLegal - Targets can use this to indicate that they only
MachineBasicBlock *
X86TargetLowering::InsertAtEndOfBasicBlock(MachineInstr *MI,
MachineBasicBlock *BB) {
+ const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
switch (MI->getOpcode()) {
default: assert(false && "Unexpected instr type to insert");
case X86::CMOV_FR32:
const BasicBlock *LLVM_BB = BB->getBasicBlock();
ilist<MachineBasicBlock>::iterator It = BB;
++It;
-
+
// thisMBB:
// ...
// TrueVal = ...
MachineBasicBlock *thisMBB = BB;
MachineBasicBlock *copy0MBB = new MachineBasicBlock(LLVM_BB);
MachineBasicBlock *sinkMBB = new MachineBasicBlock(LLVM_BB);
- unsigned Opc =
+ unsigned Opc =
X86::GetCondBranchFromCond((X86::CondCode)MI->getOperand(3).getImm());
- BuildMI(BB, Opc, 1).addMBB(sinkMBB);
+ BuildMI(BB, TII->get(Opc)).addMBB(sinkMBB);
MachineFunction *F = BB->getParent();
F->getBasicBlockList().insert(It, copy0MBB);
F->getBasicBlockList().insert(It, sinkMBB);
// Update machine-CFG edges by first adding all successors of the current
// block to the new block which will contain the Phi node for the select.
- for(MachineBasicBlock::succ_iterator i = BB->succ_begin(),
+ for(MachineBasicBlock::succ_iterator i = BB->succ_begin(),
e = BB->succ_end(); i != e; ++i)
sinkMBB->addSuccessor(*i);
// Next, remove all successors of the current block, and add the true
BB->removeSuccessor(BB->succ_begin());
BB->addSuccessor(copy0MBB);
BB->addSuccessor(sinkMBB);
-
+
// copy0MBB:
// %FalseValue = ...
// # fallthrough to sinkMBB
BB = copy0MBB;
-
+
// Update machine-CFG edges
BB->addSuccessor(sinkMBB);
-
+
// sinkMBB:
// %Result = phi [ %FalseValue, copy0MBB ], [ %TrueValue, thisMBB ]
// ...
BB = sinkMBB;
- BuildMI(BB, X86::PHI, 4, MI->getOperand(0).getReg())
+ BuildMI(BB, TII->get(X86::PHI), MI->getOperand(0).getReg())
.addReg(MI->getOperand(1).getReg()).addMBB(copy0MBB)
.addReg(MI->getOperand(2).getReg()).addMBB(thisMBB);
// mode when truncating to an integer value.
MachineFunction *F = BB->getParent();
int CWFrameIdx = F->getFrameInfo()->CreateStackObject(2, 2);
- addFrameReference(BuildMI(BB, X86::FNSTCW16m, 4), CWFrameIdx);
+ addFrameReference(BuildMI(BB, TII->get(X86::FNSTCW16m)), CWFrameIdx);
// Load the old value of the high byte of the control word...
unsigned OldCW =
F->getSSARegMap()->createVirtualRegister(X86::GR16RegisterClass);
- addFrameReference(BuildMI(BB, X86::MOV16rm, 4, OldCW), CWFrameIdx);
+ addFrameReference(BuildMI(BB, TII->get(X86::MOV16rm), OldCW), CWFrameIdx);
// Set the high part to be round to zero...
- addFrameReference(BuildMI(BB, X86::MOV16mi, 5), CWFrameIdx).addImm(0xC7F);
+ addFrameReference(BuildMI(BB, TII->get(X86::MOV16mi)), CWFrameIdx)
+ .addImm(0xC7F);
// Reload the modified control word now...
- addFrameReference(BuildMI(BB, X86::FLDCW16m, 4), CWFrameIdx);
+ addFrameReference(BuildMI(BB, TII->get(X86::FLDCW16m)), CWFrameIdx);
// Restore the memory image of control word to original value
- addFrameReference(BuildMI(BB, X86::MOV16mr, 5), CWFrameIdx).addReg(OldCW);
+ addFrameReference(BuildMI(BB, TII->get(X86::MOV16mr)), CWFrameIdx)
+ .addReg(OldCW);
// Get the X86 opcode to use.
unsigned Opc;
} else {
AM.Disp = Op.getImm();
}
- addFullAddress(BuildMI(BB, Opc, 5), AM).addReg(MI->getOperand(4).getReg());
+ addFullAddress(BuildMI(BB, TII->get(Opc)), AM)
+ .addReg(MI->getOperand(4).getReg());
// Reload the original control word now.
- addFrameReference(BuildMI(BB, X86::FLDCW16m, 4), CWFrameIdx);
+ addFrameReference(BuildMI(BB, TII->get(X86::FLDCW16m)), CWFrameIdx);
delete MI; // The pseudo instruction is gone now.
return BB;
void X86TargetLowering::computeMaskedBitsForTargetNode(const SDOperand Op,
uint64_t Mask,
- uint64_t &KnownZero,
+ uint64_t &KnownZero,
uint64_t &KnownOne,
unsigned Depth) const {
unsigned Opc = Op.getOpcode();
KnownZero = KnownOne = 0; // Don't know anything.
switch (Opc) {
default: break;
- case X86ISD::SETCC:
+ case X86ISD::SETCC:
KnownZero |= (MVT::getIntVTBitMask(Op.getValueType()) ^ 1ULL);
break;
}
/// isGAPlusOffset - Returns true (and the GlobalValue and the offset) if the
/// node is a GlobalAddress + an offset.
static bool isGAPlusOffset(SDNode *N, GlobalValue* &GA, int64_t &Offset) {
- if (N->getOpcode() == X86ISD::Wrapper) {
+ unsigned Opc = N->getOpcode();
+ if (Opc == X86ISD::Wrapper) {
if (dyn_cast<GlobalAddressSDNode>(N->getOperand(0))) {
GA = cast<GlobalAddressSDNode>(N->getOperand(0))->getGlobal();
return true;
}
- } else if (N->getOpcode() == ISD::ADD) {
+ } else if (Opc == ISD::ADD) {
SDOperand N1 = N->getOperand(0);
SDOperand N2 = N->getOperand(1);
if (isGAPlusOffset(N1.Val, GA, Offset)) {
static SDOperand PerformSELECTCombine(SDNode *N, SelectionDAG &DAG,
const X86Subtarget *Subtarget) {
SDOperand Cond = N->getOperand(0);
-
+
// If we have SSE[12] support, try to form min/max nodes.
if (Subtarget->hasSSE2() &&
(N->getValueType(0) == MVT::f32 || N->getValueType(0) == MVT::f64)) {
SDOperand LHS = N->getOperand(1);
SDOperand RHS = N->getOperand(2);
ISD::CondCode CC = cast<CondCodeSDNode>(Cond.getOperand(2))->get();
-
- unsigned IntNo = 0;
+
+ unsigned Opcode = 0;
if (LHS == Cond.getOperand(0) && RHS == Cond.getOperand(1)) {
switch (CC) {
default: break;
// FALL THROUGH.
case ISD::SETOLT: // (X olt/lt Y) ? X : Y -> min
case ISD::SETLT:
- IntNo = LHS.getValueType() == MVT::f32 ? Intrinsic::x86_sse_min_ss :
- Intrinsic::x86_sse2_min_sd;
+ Opcode = X86ISD::FMIN;
break;
-
+
case ISD::SETOGT: // (X > Y) ? X : Y -> max
case ISD::SETUGT:
case ISD::SETGT:
// FALL THROUGH.
case ISD::SETUGE: // (X uge/ge Y) ? X : Y -> max
case ISD::SETGE:
- IntNo = LHS.getValueType() == MVT::f32 ? Intrinsic::x86_sse_max_ss :
- Intrinsic::x86_sse2_max_sd;
+ Opcode = X86ISD::FMAX;
break;
}
} else if (LHS == Cond.getOperand(1) && RHS == Cond.getOperand(0)) {
// FALL THROUGH.
case ISD::SETUGE: // (X uge/ge Y) ? Y : X -> min
case ISD::SETGE:
- IntNo = LHS.getValueType() == MVT::f32 ? Intrinsic::x86_sse_min_ss :
- Intrinsic::x86_sse2_min_sd;
+ Opcode = X86ISD::FMIN;
break;
-
+
case ISD::SETOLE: // (X <= Y) ? Y : X -> max
case ISD::SETULE:
case ISD::SETLE:
// FALL THROUGH.
case ISD::SETOLT: // (X olt/lt Y) ? Y : X -> max
case ISD::SETLT:
- IntNo = LHS.getValueType() == MVT::f32 ? Intrinsic::x86_sse_max_ss :
- Intrinsic::x86_sse2_max_sd;
+ Opcode = X86ISD::FMAX;
break;
}
}
-
- // minss/maxss take a v4f32 operand.
- if (IntNo) {
- if (LHS.getValueType() == MVT::f32) {
- LHS = DAG.getNode(ISD::SCALAR_TO_VECTOR, MVT::v4f32, LHS);
- RHS = DAG.getNode(ISD::SCALAR_TO_VECTOR, MVT::v4f32, RHS);
- } else {
- LHS = DAG.getNode(ISD::SCALAR_TO_VECTOR, MVT::v2f64, LHS);
- RHS = DAG.getNode(ISD::SCALAR_TO_VECTOR, MVT::v2f64, RHS);
- }
-
- MVT::ValueType PtrTy = Subtarget->is64Bit() ? MVT::i64 : MVT::i32;
- SDOperand IntNoN = DAG.getConstant(IntNo, PtrTy);
-
- SDOperand Val = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, LHS.getValueType(),
- IntNoN, LHS, RHS);
- return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, N->getValueType(0), Val,
- DAG.getConstant(0, PtrTy));
- }
+
+ if (Opcode)
+ return DAG.getNode(Opcode, N->getValueType(0), LHS, RHS);
}
-
+
}
return SDOperand();
}
-SDOperand X86TargetLowering::PerformDAGCombine(SDNode *N,
+SDOperand X86TargetLowering::PerformDAGCombine(SDNode *N,
DAGCombinerInfo &DCI) const {
- TargetMachine &TM = getTargetMachine();
SelectionDAG &DAG = DCI.DAG;
switch (N->getOpcode()) {
default: break;
}
}
+/// isOperandValidForConstraint - Return the specified operand (possibly
+/// modified) if the specified SDOperand is valid for the specified target
+/// constraint letter, otherwise return null.
+SDOperand X86TargetLowering::
+isOperandValidForConstraint(SDOperand Op, char Constraint, SelectionDAG &DAG) {
+ switch (Constraint) {
+ default: break;
+ case 'i':
+ // Literal immediates are always ok.
+ if (isa<ConstantSDNode>(Op)) return Op;
+
+ // If we are in non-pic codegen mode, we allow the address of a global to
+ // be used with 'i'.
+ if (GlobalAddressSDNode *GA = dyn_cast<GlobalAddressSDNode>(Op)) {
+ if (getTargetMachine().getRelocationModel() == Reloc::PIC_)
+ return SDOperand(0, 0);
+
+ if (GA->getOpcode() != ISD::TargetGlobalAddress)
+ Op = DAG.getTargetGlobalAddress(GA->getGlobal(), GA->getValueType(0),
+ GA->getOffset());
+ return Op;
+ }
+
+ // Otherwise, not valid for this mode.
+ return SDOperand(0, 0);
+ }
+ return TargetLowering::isOperandValidForConstraint(Op, Constraint, DAG);
+}
+
+
std::vector<unsigned> X86TargetLowering::
getRegClassForInlineAsmConstraint(const std::string &Constraint,
MVT::ValueType VT) const {
break;
case 'r': // GENERAL_REGS
case 'R': // LEGACY_REGS
+ if (VT == MVT::i64 && Subtarget->is64Bit())
+ return make_vector<unsigned>(X86::RAX, X86::RDX, X86::RCX, X86::RBX,
+ X86::RSI, X86::RDI, X86::RBP, X86::RSP,
+ X86::R8, X86::R9, X86::R10, X86::R11,
+ X86::R12, X86::R13, X86::R14, X86::R15, 0);
if (VT == MVT::i32)
return make_vector<unsigned>(X86::EAX, X86::EDX, X86::ECX, X86::EBX,
X86::ESI, X86::EDI, X86::EBP, X86::ESP, 0);
else if (VT == MVT::i16)
- return make_vector<unsigned>(X86::AX, X86::DX, X86::CX, X86::BX,
+ return make_vector<unsigned>(X86::AX, X86::DX, X86::CX, X86::BX,
X86::SI, X86::DI, X86::BP, X86::SP, 0);
else if (VT == MVT::i8)
- return make_vector<unsigned>(X86::AL, X86::DL, X86::CL, X86::DL, 0);
+ return make_vector<unsigned>(X86::AL, X86::DL, X86::CL, X86::BL, 0);
break;
case 'l': // INDEX_REGS
if (VT == MVT::i32)
return make_vector<unsigned>(X86::EAX, X86::EDX, X86::ECX, X86::EBX,
X86::ESI, X86::EDI, X86::EBP, 0);
else if (VT == MVT::i16)
- return make_vector<unsigned>(X86::AX, X86::DX, X86::CX, X86::BX,
+ return make_vector<unsigned>(X86::AX, X86::DX, X86::CX, X86::BX,
X86::SI, X86::DI, X86::BP, 0);
else if (VT == MVT::i8)
return make_vector<unsigned>(X86::AL, X86::DL, X86::CL, X86::DL, 0);
return std::vector<unsigned>();
}
}
-
+
return std::vector<unsigned>();
}
-std::pair<unsigned, const TargetRegisterClass*>
+std::pair<unsigned, const TargetRegisterClass*>
X86TargetLowering::getRegForInlineAsmConstraint(const std::string &Constraint,
MVT::ValueType VT) const {
// Use the default implementation in TargetLowering to convert the register
// constraint into a member of a register class.
std::pair<unsigned, const TargetRegisterClass*> Res;
Res = TargetLowering::getRegForInlineAsmConstraint(Constraint, VT);
-
- // Not found? Bail out.
- if (Res.second == 0) return Res;
-
+
+ // Not found as a standard register?
+ if (Res.second == 0) {
+ // GCC calls "st(0)" just plain "st".
+ if (StringsEqualNoCase("{st}", Constraint)) {
+ Res.first = X86::ST0;
+ Res.second = X86::RSTRegisterClass;
+ }
+
+ return Res;
+ }
+
// Otherwise, check to see if this is a register class of the wrong value
// type. For example, we want to map "{ax},i32" -> {eax}, we don't want it to
// turn into {ax},{dx}.
if (Res.second->hasType(VT))
return Res; // Correct type already, nothing to do.
-
+
// All of the single-register GCC register classes map their values onto
// 16-bit register pieces "ax","dx","cx","bx","si","di","bp","sp". If we
// really want an 8-bit or 32-bit register, map to the appropriate register
// class and return the appropriate register.
if (Res.second != X86::GR16RegisterClass)
return Res;
-
+
if (VT == MVT::i8) {
unsigned DestReg = 0;
switch (Res.first) {
Res.second = Res.second = X86::GR64RegisterClass;
}
}
-
+
return Res;
}
-
projects / oota-llvm.git / blobdiff