Subversion Repositories QNX 8.QNX8 LLVM/Clang compiler suite

//===- TargetCallingConv.td - Target Calling Conventions ---*- tablegen -*-===//

//

// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.

// See https://llvm.org/LICENSE.txt for license information.

// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception

//

//===----------------------------------------------------------------------===//

//

// 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> {

}

/// CCIfPreallocated - If the current argument has Preallocated parameter attribute,

/// apply Action A.

class CCIfPreallocated<CCAction A> : CCIf<"ArgFlags.isPreallocated()", A> {

}

/// CCIfSwiftSelf - If the current argument has swiftself parameter attribute,

/// apply Action A.

class CCIfSwiftSelf<CCAction A> : CCIf<"ArgFlags.isSwiftSelf()", A> {

}

/// CCIfSwiftAsync - If the current argument has swiftasync parameter attribute,

/// apply Action A.

class CCIfSwiftAsync<CCAction A> : CCIf<"ArgFlags.isSwiftAsync()", A> {

}

/// CCIfSwiftError - If the current argument has swifterror parameter attribute,

/// apply Action A.

class CCIfSwiftError<CCAction A> : CCIf<"ArgFlags.isSwiftError()", A> {

}

/// CCIfCFGuardTarget - If the current argument has cfguardtarget parameter

/// attribute, apply Action A.

class CCIfCFGuardTarget<CCAction A> : CCIf<"ArgFlags.isCFGuardTarget()", A> {

}

/// CCIfConsecutiveRegs - If the current argument has InConsecutiveRegs

/// parameter attribute, apply Action A.

class CCIfConsecutiveRegs<CCAction A> : CCIf<"ArgFlags.isInConsecutiveRegs()", 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> {}

/// CCIfVarArg - If the current function is vararg - apply the action

class CCIfVarArg<CCAction A> : CCIf<"State.isVarArg()", A> {}

/// CCIfNotVarArg - If the current function is not vararg - apply the action

class CCIfNotVarArg<CCAction A> : CCIf<"!State.isVarArg()", A> {}

/// CCIfPtrAddrSpace - If the top-level parent of the current argument has

/// pointer type in the specified address-space.

class CCIfPtrAddrSpace<int AS, CCAction A>

    : CCIf<"(ArgFlags.isPointer() && ArgFlags.getPointerAddrSpace() == " # AS # ")", A> {}

/// CCIfPtr - If the top-level parent of the current argument had

/// pointer type in some address-space.

class CCIfPtr<CCAction A> : CCIf<"ArgFlags.isPointer()", 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 list of

/// registers to be shadowed. Note that, unlike CCAssignToRegWithShadow, this

/// shadows ALL of the registers in shadowList.

class CCAssignToStackWithShadow<int size,

                                int align,

                                list<Register> shadowList> : CCAction {

  int Size = size;

  int Align = align;

  list<Register> ShadowRegList = shadowList;

}

/// CCAssignToRegAndStack - Same as CCAssignToReg, but also allocates a stack

/// slot, when some register is used. Basically, it works like:

/// CCIf<CCAssignToReg<regList>, CCAssignToStack<size, align>>.

class CCAssignToRegAndStack<list<Register> regList, int size, int align>

    : CCAssignToReg<regList> {

  int Size = size;

  int Align = align;

}

/// 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;

}

/// CCPromoteToUpperBitsInType - If applied, this promotes the specified current

/// value to the specified type and shifts the value into the upper bits.

class CCPromoteToUpperBitsInType<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;

}

/// CCTruncToType - If applied, this truncates the specified current value to

/// the specified type.

class CCTruncToType<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;

  /// If true, this calling convention will be emitted as externally visible in

  /// the llvm namespaces instead of as a static function.

  bit Entry = false;

  bit Custom = false;

}

/// CustomCallingConv - An instance of this is used to declare calling

/// conventions that are implemented using a custom function of the same name.

class CustomCallingConv : CallingConv<[]> {

  let Custom = true;

}

/// 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;

}