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//===- TargetCallingConv.td - Target Calling Conventions ---*- tablegen -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file defines the target-independent interfaces with which targets
// describe their calling conventions.
//
//===----------------------------------------------------------------------===//
class CCAction;
class CallingConv;
/// CCCustom - Calls a custom arg handling function.
class CCCustom<string fn> : CCAction {
string FuncName = fn;
}
/// CCPredicateAction - Instances of this class check some predicate, then
/// delegate to another action if the predicate is true.
class CCPredicateAction<CCAction A> : CCAction {
CCAction SubAction = A;
}
/// CCIfType - If the current argument is one of the specified types, apply
/// Action A.
class CCIfType<list<ValueType> vts, CCAction A> : CCPredicateAction<A> {
list<ValueType> VTs = vts;
}
/// CCIf - If the predicate matches, apply A.
class CCIf<string predicate, CCAction A> : CCPredicateAction<A> {
string Predicate = predicate;
}
/// CCIfByVal - If the current argument has ByVal parameter attribute, apply
/// Action A.
class CCIfByVal<CCAction A> : CCIf<"ArgFlags.isByVal()", A> {
}
/// CCIfCC - Match if the current calling convention is 'CC'.
class CCIfCC<string CC, CCAction A>
: CCIf<!strconcat("State.getCallingConv() == ", CC), A> {}
/// CCIfInReg - If this argument is marked with the 'inreg' attribute, apply
/// the specified action.
class CCIfInReg<CCAction A> : CCIf<"ArgFlags.isInReg()", A> {}
/// CCIfNest - If this argument is marked with the 'nest' attribute, apply
/// the specified action.
class CCIfNest<CCAction A> : CCIf<"ArgFlags.isNest()", A> {}
/// CCIfSplit - If this argument is marked with the 'split' attribute, apply
/// the specified action.
class CCIfSplit<CCAction A> : CCIf<"ArgFlags.isSplit()", A> {}
/// CCIfSRet - If this argument is marked with the 'sret' attribute, apply
/// the specified action.
class CCIfSRet<CCAction A> : CCIf<"ArgFlags.isSRet()", A> {}
/// CCIfNotVarArg - If the current function is not vararg - apply the action
class CCIfNotVarArg<CCAction A> : CCIf<"!State.isVarArg()", A> {}
/// CCAssignToReg - This action matches if there is a register in the specified
/// list that is still available. If so, it assigns the value to the first
/// available register and succeeds.
class CCAssignToReg<list<Register> regList> : CCAction {
list<Register> RegList = regList;
}
/// CCAssignToRegWithShadow - Same as CCAssignToReg, but with list of registers
/// which became shadowed, when some register is used.
class CCAssignToRegWithShadow<list<Register> regList,
list<Register> shadowList> : CCAction {
list<Register> RegList = regList;
list<Register> ShadowRegList = shadowList;
}
/// CCAssignToStack - This action always matches: it assigns the value to a
/// stack slot of the specified size and alignment on the stack. If size is
/// zero then the ABI size is used; if align is zero then the ABI alignment
/// is used - these may depend on the target or subtarget.
class CCAssignToStack<int size, int align> : CCAction {
int Size = size;
int Align = align;
}
/// CCAssignToStackWithShadow - Same as CCAssignToStack, but with a register
/// to be shadowed.
class CCAssignToStackWithShadow<int size, int align, Register reg> :
CCAssignToStack<size, align> {
Register ShadowReg = reg;
}
/// CCPassByVal - This action always matches: it assigns the value to a stack
/// slot to implement ByVal aggregate parameter passing. Size and alignment
/// specify the minimum size and alignment for the stack slot.
class CCPassByVal<int size, int align> : CCAction {
int Size = size;
int Align = align;
}
/// CCPromoteToType - If applied, this promotes the specified current value to
/// the specified type.
class CCPromoteToType<ValueType destTy> : CCAction {
ValueType DestTy = destTy;
}
/// CCBitConvertToType - If applied, this bitconverts the specified current
/// value to the specified type.
class CCBitConvertToType<ValueType destTy> : CCAction {
ValueType DestTy = destTy;
}
/// CCPassIndirect - If applied, this stores the value to stack and passes the pointer
/// as normal argument.
class CCPassIndirect<ValueType destTy> : CCAction {
ValueType DestTy = destTy;
}
/// CCDelegateTo - This action invokes the specified sub-calling-convention. It
/// is successful if the specified CC matches.
class CCDelegateTo<CallingConv cc> : CCAction {
CallingConv CC = cc;
}
/// CallingConv - An instance of this is used to define each calling convention
/// that the target supports.
class CallingConv<list<CCAction> actions> {
list<CCAction> Actions = actions;
}
/// CalleeSavedRegs - A list of callee saved registers for a given calling
/// convention. The order of registers is used by PrologEpilogInsertion when
/// allocation stack slots for saved registers.
///
/// For each CalleeSavedRegs def, TableGen will emit a FOO_SaveList array for
/// returning from getCalleeSavedRegs(), and a FOO_RegMask bit mask suitable for
/// returning from getCallPreservedMask().
class CalleeSavedRegs<dag saves> {
dag SaveList = saves;
// Registers that are also preserved across function calls, but should not be
// included in the generated FOO_SaveList array. These registers will be
// included in the FOO_RegMask bit mask. This can be used for registers that
// are saved automatically, like the SPARC register windows.
dag OtherPreserved;
}
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