namespace llvm {
class MRegisterInfo;
+ class TargetMachine;
-/// CCState - This class holds information needed while lowering arguments and
-/// return values. It captures which registers are already assigned and which
-/// stack slots are used. It provides accessors to allocate these values.
-class CCState {
- unsigned StackOffset;
- const MRegisterInfo &MRI;
- SmallVector<uint32_t, 16> UsedRegs;
-public:
- CCState(const MRegisterInfo &mri);
-
- unsigned getNextStackOffset() const { return StackOffset; }
-
- /// isAllocated - Return true if the specified register (or an alias) is
- /// allocated.
- bool isAllocated(unsigned Reg) const {
- return UsedRegs[Reg/32] & (1 << (Reg&31));
- }
-
- /// getFirstUnallocated - Return the first unallocated register in the set, or
- /// NumRegs if they are all allocated.
- unsigned getFirstUnallocated(const unsigned *Regs, unsigned NumRegs) const {
- for (unsigned i = 0; i != NumRegs; ++i)
- if (!isAllocated(Regs[i]))
- return i;
- return NumRegs;
- }
-
- /// AllocateReg - Attempt to allocate one of the specified registers. If none
- /// are available, return zero. Otherwise, return the first one available,
- /// marking it and any aliases as allocated.
- unsigned AllocateReg(const unsigned *Regs, unsigned NumRegs) {
- unsigned FirstUnalloc = getFirstUnallocated(Regs, NumRegs);
- if (FirstUnalloc == NumRegs)
- return 0; // Didn't find the reg.
-
- // Mark the register and any aliases as allocated.
- unsigned Reg = Regs[FirstUnalloc];
- MarkAllocated(Reg);
- return Reg;
- }
-
- /// AllocateStack - Allocate a chunk of stack space with the specified size
- /// and alignment.
- unsigned AllocateStack(unsigned Size, unsigned Align) {
- assert(Align && ((Align-1) & Align) == 0); // Align is power of 2.
- StackOffset = ((StackOffset + Align-1) & ~(Align-1));
- unsigned Result = StackOffset;
- StackOffset += Size;
- return Result;
- }
-private:
- /// MarkAllocated - Mark a register and all of its aliases as allocated.
- void MarkAllocated(unsigned Reg);
-};
-
/// CCValAssign - Represent assignment of one arg/retval to a location.
class CCValAssign {
public:
LocInfo getLocInfo() const { return HTP; }
};
+
+
+/// CCState - This class holds information needed while lowering arguments and
+/// return values. It captures which registers are already assigned and which
+/// stack slots are used. It provides accessors to allocate these values.
+class CCState {
+ unsigned CallingConv;
+ const TargetMachine &TM;
+ const MRegisterInfo &MRI;
+ SmallVector<CCValAssign, 16> &Locs;
+
+ unsigned StackOffset;
+ SmallVector<uint32_t, 16> UsedRegs;
+public:
+ CCState(unsigned CC, const TargetMachine &TM,
+ SmallVector<CCValAssign, 16> &locs);
+
+ void addLoc(const CCValAssign &V) {
+ Locs.push_back(V);
+ }
+
+ const TargetMachine &getTarget() const { return TM; }
+ unsigned getCallingConv() const { return CallingConv; }
+
+ unsigned getNextStackOffset() const { return StackOffset; }
+
+ /// isAllocated - Return true if the specified register (or an alias) is
+ /// allocated.
+ bool isAllocated(unsigned Reg) const {
+ return UsedRegs[Reg/32] & (1 << (Reg&31));
+ }
+
+ /// getFirstUnallocated - Return the first unallocated register in the set, or
+ /// NumRegs if they are all allocated.
+ unsigned getFirstUnallocated(const unsigned *Regs, unsigned NumRegs) const {
+ for (unsigned i = 0; i != NumRegs; ++i)
+ if (!isAllocated(Regs[i]))
+ return i;
+ return NumRegs;
+ }
+
+ /// AllocateReg - Attempt to allocate one register. If it is not available,
+ /// return zero. Otherwise, return the register, marking it and any aliases
+ /// as allocated.
+ unsigned AllocateReg(unsigned Reg) {
+ if (isAllocated(Reg)) return 0;
+ MarkAllocated(Reg);
+ return Reg;
+ }
+
+ /// AllocateReg - Attempt to allocate one of the specified registers. If none
+ /// are available, return zero. Otherwise, return the first one available,
+ /// marking it and any aliases as allocated.
+ unsigned AllocateReg(const unsigned *Regs, unsigned NumRegs) {
+ unsigned FirstUnalloc = getFirstUnallocated(Regs, NumRegs);
+ if (FirstUnalloc == NumRegs)
+ return 0; // Didn't find the reg.
+
+ // Mark the register and any aliases as allocated.
+ unsigned Reg = Regs[FirstUnalloc];
+ MarkAllocated(Reg);
+ return Reg;
+ }
+
+ /// AllocateStack - Allocate a chunk of stack space with the specified size
+ /// and alignment.
+ unsigned AllocateStack(unsigned Size, unsigned Align) {
+ assert(Align && ((Align-1) & Align) == 0); // Align is power of 2.
+ StackOffset = ((StackOffset + Align-1) & ~(Align-1));
+ unsigned Result = StackOffset;
+ StackOffset += Size;
+ return Result;
+ }
+private:
+ /// MarkAllocated - Mark a register and all of its aliases as allocated.
+ void MarkAllocated(unsigned Reg);
+};
+
} // end namespace llvm
#endif
// Return Value Calling Convention Implementation
//===----------------------------------------------------------------------===//
+
/// GetRetValueLocs - If we are returning a set of values with the specified
/// value types, determine the set of registers each one will land in. This
/// sets one element of the ResultRegs array for each element in the VTs array.
//===----------------------------------------------------------------------===//
-/// X86_64_CCC_AssignArgument - Implement the X86-64 C Calling Convention.
-static void X86_64_CCC_AssignArgument(unsigned ValNo,
+/// X86_64_CCC_AssignArgument - Implement the X86-64 C Calling Convention. This
+/// returns true if the value was not handled by this calling convention.
+static bool X86_64_CCC_AssignArgument(unsigned ValNo,
MVT::ValueType ArgVT, unsigned ArgFlags,
- CCState &State,
- SmallVector<CCValAssign, 16> &Locs) {
+ CCState &State) {
MVT::ValueType LocVT = ArgVT;
CCValAssign::LocInfo LocInfo = CCValAssign::Full;
X86::EDI, X86::ESI, X86::EDX, X86::ECX, X86::R8D, X86::R9D
};
if (unsigned Reg = State.AllocateReg(GPR32ArgRegs, 6)) {
- Locs.push_back(CCValAssign::getReg(ValNo, ArgVT, Reg, LocVT, LocInfo));
- return;
+ State.addLoc(CCValAssign::getReg(ValNo, ArgVT, Reg, LocVT, LocInfo));
+ return false;
}
}
X86::RDI, X86::RSI, X86::RDX, X86::RCX, X86::R8, X86::R9
};
if (unsigned Reg = State.AllocateReg(GPR64ArgRegs, 6)) {
- Locs.push_back(CCValAssign::getReg(ValNo, ArgVT, Reg, LocVT, LocInfo));
- return;
+ State.addLoc(CCValAssign::getReg(ValNo, ArgVT, Reg, LocVT, LocInfo));
+ return false;
}
}
X86::XMM4, X86::XMM5, X86::XMM6, X86::XMM7
};
if (unsigned Reg = State.AllocateReg(XMMArgRegs, 8)) {
- Locs.push_back(CCValAssign::getReg(ValNo, ArgVT, Reg, LocVT, LocInfo));
- return;
+ State.addLoc(CCValAssign::getReg(ValNo, ArgVT, Reg, LocVT, LocInfo));
+ return false;
}
}
if (LocVT == MVT::i32 || LocVT == MVT::i64 ||
LocVT == MVT::f32 || LocVT == MVT::f64) {
unsigned Offset = State.AllocateStack(8, 8);
- Locs.push_back(CCValAssign::getMem(ValNo, ArgVT, Offset, LocVT, LocInfo));
- return;
+ State.addLoc(CCValAssign::getMem(ValNo, ArgVT, Offset, LocVT, LocInfo));
+ return false;
}
// Vectors get 16-byte stack slots that are 16-byte aligned.
if (MVT::isVector(LocVT)) {
unsigned Offset = State.AllocateStack(16, 16);
- Locs.push_back(CCValAssign::getMem(ValNo, ArgVT, Offset, LocVT, LocInfo));
- return;
+ State.addLoc(CCValAssign::getMem(ValNo, ArgVT, Offset, LocVT, LocInfo));
+ return false;
}
- assert(0 && "Unknown argument type!");
+ return true;
}
X86::XMM4, X86::XMM5, X86::XMM6, X86::XMM7
};
- SmallVector<SDOperand, 8> ArgValues;
-
-
- CCState CCInfo(*getTargetMachine().getRegisterInfo());
SmallVector<CCValAssign, 16> ArgLocs;
+ CCState CCInfo(MF.getFunction()->getCallingConv(), getTargetMachine(),
+ ArgLocs);
for (unsigned i = 0; i != NumArgs; ++i) {
MVT::ValueType ArgVT = Op.getValue(i).getValueType();
unsigned ArgFlags = cast<ConstantSDNode>(Op.getOperand(3+i))->getValue();
- X86_64_CCC_AssignArgument(i, ArgVT, ArgFlags, CCInfo, ArgLocs);
+ if (X86_64_CCC_AssignArgument(i, ArgVT, ArgFlags, CCInfo))
+ assert(0 && "Unhandled argument type!");
}
+ SmallVector<SDOperand, 8> ArgValues;
unsigned LastVal = ~0U;
for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) {
CCValAssign &VA = ArgLocs[i];
SDOperand Callee = Op.getOperand(4);
unsigned NumOps = (Op.getNumOperands() - 5) / 2;
- CCState CCInfo(*getTargetMachine().getRegisterInfo());
SmallVector<CCValAssign, 16> ArgLocs;
+ CCState CCInfo(CC, getTargetMachine(), ArgLocs);
for (unsigned i = 0; i != NumOps; ++i) {
MVT::ValueType ArgVT = Op.getOperand(5+2*i).getValueType();
unsigned ArgFlags =cast<ConstantSDNode>(Op.getOperand(5+2*i+1))->getValue();
- X86_64_CCC_AssignArgument(i, ArgVT, ArgFlags, CCInfo, ArgLocs);
+ if (X86_64_CCC_AssignArgument(i, ArgVT, ArgFlags, CCInfo))
+ assert(0 && "Unhandled argument type!");
}
// Get a count of how many bytes are to be pushed on the stack.
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