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switch LowerFastCCCallTo over to using the new fastcall description.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34734 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2007-02-28 06:26:33 +00:00
parent fc664c1bc0
commit f5d280a0a6
1 changed files with 41 additions and 98 deletions
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139
lib/Target/X86/X86ISelLowering.cpp
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@ -958,58 +958,19 @@ SDOperand X86TargetLowering::LowerFastCCCallTo(SDOperand Op, SelectionDAG &DAG,
SDOperand Callee = Op.getOperand(4);
unsigned NumOps = (Op.getNumOperands() - 5) / 2;
// Count how many bytes are to be pushed on the stack.
unsigned NumBytes = 0;
// Keep track of the number of integer regs passed so far. This can be either
// 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::CL, X86::DL },
{ X86::CX, X86::DX },
{ X86::ECX, X86::EDX }
};
static const unsigned XMMArgRegs[] = {
X86::XMM0, X86::XMM1, X86::XMM2, X86::XMM3
};
SmallVector<CCValAssign, 16> ArgLocs;
CCState CCInfo(CC, getTargetMachine(), ArgLocs);
for (unsigned i = 0; i != NumOps; ++i) {
SDOperand Arg = Op.getOperand(5+2*i);
switch (Arg.getValueType()) {
default: assert(0 && "Unknown value type!");
case MVT::i8:
case MVT::i16:
case MVT::i32:
if (NumIntRegs < 2) {
++NumIntRegs;
break;
} // Fall through
case MVT::f32:
NumBytes += 4;
break;
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.
NumBytes = ((NumBytes + 15) / 16) * 16;
NumBytes += 16;
}
break;
}
MVT::ValueType ArgVT = Op.getOperand(5+2*i).getValueType();
unsigned ArgFlags =cast<ConstantSDNode>(Op.getOperand(5+2*i+1))->getValue();
if (CC_X86_32_C(i, ArgVT, ArgVT, CCValAssign::Full, ArgFlags, CCInfo))
assert(0 && "Unhandled argument type!");
}
// Get a count of how many bytes are to be pushed on the stack.
unsigned NumBytes = CCInfo.getNextStackOffset();
// 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.
@ -1018,59 +979,41 @@ SDOperand X86TargetLowering::LowerFastCCCallTo(SDOperand Op, SelectionDAG &DAG,
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;
NumIntRegs = 0;
SmallVector<std::pair<unsigned, SDOperand>, 8> RegsToPass;
SmallVector<SDOperand, 8> 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:
case MVT::i32:
if (NumIntRegs < 2) {
unsigned RegToUse =
GPRArgRegs[Arg.getValueType()-MVT::i8][NumIntRegs];
RegsToPass.push_back(std::make_pair(RegToUse, Arg));
++NumIntRegs;
SDOperand StackPtr;
// Walk the register/memloc assignments, inserting copies/loads.
for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) {
CCValAssign &VA = ArgLocs[i];
SDOperand Arg = Op.getOperand(5+2*VA.getValNo());
// Promote the value if needed.
switch (VA.getLocInfo()) {
default: assert(0 && "Unknown loc info!");
case CCValAssign::Full: break;
case CCValAssign::SExt:
Arg = DAG.getNode(ISD::SIGN_EXTEND, VA.getLocVT(), Arg);
break;
} // Fall through
case MVT::f32: {
SDOperand PtrOff = DAG.getConstant(ArgOffset, getPointerTy());
case CCValAssign::ZExt:
Arg = DAG.getNode(ISD::ZERO_EXTEND, VA.getLocVT(), Arg);
break;
case CCValAssign::AExt:
Arg = DAG.getNode(ISD::ANY_EXTEND, VA.getLocVT(), Arg);
break;
}
if (VA.isRegLoc()) {
RegsToPass.push_back(std::make_pair(VA.getLocReg(), Arg));
} else {
assert(VA.isMemLoc());
if (StackPtr.Val == 0)
StackPtr = DAG.getRegister(getStackPtrReg(), getPointerTy());
SDOperand PtrOff = DAG.getConstant(VA.getLocMemOffset(), getPointerTy());
PtrOff = DAG.getNode(ISD::ADD, getPointerTy(), StackPtr, PtrOff);
MemOpChains.push_back(DAG.getStore(Chain, Arg, PtrOff, NULL, 0));
ArgOffset += 4;
break;
}
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;
}
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;
}
break;
}
}