CallingConvLower.cpp [plain text]
#include "llvm/CodeGen/CallingConvLower.h"
#include "llvm/CodeGen/MachineFrameInfo.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/Target/TargetRegisterInfo.h"
#include "llvm/Target/TargetData.h"
#include "llvm/Target/TargetMachine.h"
#include "llvm/Target/TargetLowering.h"
using namespace llvm;
CCState::CCState(CallingConv::ID CC, bool isVarArg, MachineFunction &mf,
const TargetMachine &tm, SmallVector<CCValAssign, 16> &locs,
LLVMContext &C)
: CallingConv(CC), IsVarArg(isVarArg), MF(mf), TM(tm),
TRI(*TM.getRegisterInfo()), Locs(locs), Context(C),
CallOrPrologue(Unknown) {
StackOffset = 0;
clearFirstByValReg();
UsedRegs.resize((TRI.getNumRegs()+31)/32);
}
void CCState::HandleByVal(unsigned ValNo, MVT ValVT,
MVT LocVT, CCValAssign::LocInfo LocInfo,
int MinSize, int MinAlign,
ISD::ArgFlagsTy ArgFlags) {
unsigned Align = ArgFlags.getByValAlign();
unsigned Size = ArgFlags.getByValSize();
if (MinSize > (int)Size)
Size = MinSize;
if (MinAlign > (int)Align)
Align = MinAlign;
if (MF.getFrameInfo()->getMaxAlignment() < Align)
MF.getFrameInfo()->setMaxAlignment(Align);
TM.getTargetLowering()->HandleByVal(this, Size);
unsigned Offset = AllocateStack(Size, Align);
addLoc(CCValAssign::getMem(ValNo, ValVT, Offset, LocVT, LocInfo));
}
void CCState::MarkAllocated(unsigned Reg) {
for (const unsigned *Alias = TRI.getOverlaps(Reg);
unsigned Reg = *Alias; ++Alias)
UsedRegs[Reg/32] |= 1 << (Reg&31);
}
void
CCState::AnalyzeFormalArguments(const SmallVectorImpl<ISD::InputArg> &Ins,
CCAssignFn Fn) {
unsigned NumArgs = Ins.size();
for (unsigned i = 0; i != NumArgs; ++i) {
MVT ArgVT = Ins[i].VT;
ISD::ArgFlagsTy ArgFlags = Ins[i].Flags;
if (Fn(i, ArgVT, ArgVT, CCValAssign::Full, ArgFlags, *this)) {
#ifndef NDEBUG
dbgs() << "Formal argument #" << i << " has unhandled type "
<< EVT(ArgVT).getEVTString();
#endif
llvm_unreachable(0);
}
}
}
bool CCState::CheckReturn(const SmallVectorImpl<ISD::OutputArg> &Outs,
CCAssignFn Fn) {
for (unsigned i = 0, e = Outs.size(); i != e; ++i) {
MVT VT = Outs[i].VT;
ISD::ArgFlagsTy ArgFlags = Outs[i].Flags;
if (Fn(i, VT, VT, CCValAssign::Full, ArgFlags, *this))
return false;
}
return true;
}
void CCState::AnalyzeReturn(const SmallVectorImpl<ISD::OutputArg> &Outs,
CCAssignFn Fn) {
for (unsigned i = 0, e = Outs.size(); i != e; ++i) {
MVT VT = Outs[i].VT;
ISD::ArgFlagsTy ArgFlags = Outs[i].Flags;
if (Fn(i, VT, VT, CCValAssign::Full, ArgFlags, *this)) {
#ifndef NDEBUG
dbgs() << "Return operand #" << i << " has unhandled type "
<< EVT(VT).getEVTString();
#endif
llvm_unreachable(0);
}
}
}
void CCState::AnalyzeCallOperands(const SmallVectorImpl<ISD::OutputArg> &Outs,
CCAssignFn Fn) {
unsigned NumOps = Outs.size();
for (unsigned i = 0; i != NumOps; ++i) {
MVT ArgVT = Outs[i].VT;
ISD::ArgFlagsTy ArgFlags = Outs[i].Flags;
if (Fn(i, ArgVT, ArgVT, CCValAssign::Full, ArgFlags, *this)) {
#ifndef NDEBUG
dbgs() << "Call operand #" << i << " has unhandled type "
<< EVT(ArgVT).getEVTString();
#endif
llvm_unreachable(0);
}
}
}
void CCState::AnalyzeCallOperands(SmallVectorImpl<MVT> &ArgVTs,
SmallVectorImpl<ISD::ArgFlagsTy> &Flags,
CCAssignFn Fn) {
unsigned NumOps = ArgVTs.size();
for (unsigned i = 0; i != NumOps; ++i) {
MVT ArgVT = ArgVTs[i];
ISD::ArgFlagsTy ArgFlags = Flags[i];
if (Fn(i, ArgVT, ArgVT, CCValAssign::Full, ArgFlags, *this)) {
#ifndef NDEBUG
dbgs() << "Call operand #" << i << " has unhandled type "
<< EVT(ArgVT).getEVTString();
#endif
llvm_unreachable(0);
}
}
}
void CCState::AnalyzeCallResult(const SmallVectorImpl<ISD::InputArg> &Ins,
CCAssignFn Fn) {
for (unsigned i = 0, e = Ins.size(); i != e; ++i) {
MVT VT = Ins[i].VT;
ISD::ArgFlagsTy Flags = Ins[i].Flags;
if (Fn(i, VT, VT, CCValAssign::Full, Flags, *this)) {
#ifndef NDEBUG
dbgs() << "Call result #" << i << " has unhandled type "
<< EVT(VT).getEVTString() << "\n";
#endif
llvm_unreachable(0);
}
}
}
void CCState::AnalyzeCallResult(MVT VT, CCAssignFn Fn) {
if (Fn(0, VT, VT, CCValAssign::Full, ISD::ArgFlagsTy(), *this)) {
#ifndef NDEBUG
dbgs() << "Call result has unhandled type "
<< EVT(VT).getEVTString();
#endif
llvm_unreachable(0);
}
}