1//===- TargetCallingConv.td - Target Calling Conventions ---*- tablegen -*-===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This file defines the target-independent interfaces with which targets 11// describe their calling conventions. 12// 13//===----------------------------------------------------------------------===// 14 15class CCAction; 16class CallingConv; 17 18/// CCCustom - Calls a custom arg handling function. 19class CCCustom<string fn> : CCAction { 20 string FuncName = fn; 21} 22 23/// CCPredicateAction - Instances of this class check some predicate, then 24/// delegate to another action if the predicate is true. 25class CCPredicateAction<CCAction A> : CCAction { 26 CCAction SubAction = A; 27} 28 29/// CCIfType - If the current argument is one of the specified types, apply 30/// Action A. 31class CCIfType<list<ValueType> vts, CCAction A> : CCPredicateAction<A> { 32 list<ValueType> VTs = vts; 33} 34 35/// CCIf - If the predicate matches, apply A. 36class CCIf<string predicate, CCAction A> : CCPredicateAction<A> { 37 string Predicate = predicate; 38} 39 40/// CCIfByVal - If the current argument has ByVal parameter attribute, apply 41/// Action A. 42class CCIfByVal<CCAction A> : CCIf<"ArgFlags.isByVal()", A> { 43} 44 45/// CCIfCC - Match if the current calling convention is 'CC'. 46class CCIfCC<string CC, CCAction A> 47 : CCIf<!strconcat("State.getCallingConv() == ", CC), A> {} 48 49/// CCIfInReg - If this argument is marked with the 'inreg' attribute, apply 50/// the specified action. 51class CCIfInReg<CCAction A> : CCIf<"ArgFlags.isInReg()", A> {} 52 53/// CCIfNest - If this argument is marked with the 'nest' attribute, apply 54/// the specified action. 55class CCIfNest<CCAction A> : CCIf<"ArgFlags.isNest()", A> {} 56 57/// CCIfSplit - If this argument is marked with the 'split' attribute, apply 58/// the specified action. 59class CCIfSplit<CCAction A> : CCIf<"ArgFlags.isSplit()", A> {} 60 61/// CCIfSRet - If this argument is marked with the 'sret' attribute, apply 62/// the specified action. 63class CCIfSRet<CCAction A> : CCIf<"ArgFlags.isSRet()", A> {} 64 65/// CCIfNotVarArg - If the current function is not vararg - apply the action 66class CCIfNotVarArg<CCAction A> : CCIf<"!State.isVarArg()", A> {} 67 68/// CCAssignToReg - This action matches if there is a register in the specified 69/// list that is still available. If so, it assigns the value to the first 70/// available register and succeeds. 71class CCAssignToReg<list<Register> regList> : CCAction { 72 list<Register> RegList = regList; 73} 74 75/// CCAssignToRegWithShadow - Same as CCAssignToReg, but with list of registers 76/// which became shadowed, when some register is used. 77class CCAssignToRegWithShadow<list<Register> regList, 78 list<Register> shadowList> : CCAction { 79 list<Register> RegList = regList; 80 list<Register> ShadowRegList = shadowList; 81} 82 83/// CCAssignToStack - This action always matches: it assigns the value to a 84/// stack slot of the specified size and alignment on the stack. If size is 85/// zero then the ABI size is used; if align is zero then the ABI alignment 86/// is used - these may depend on the target or subtarget. 87class CCAssignToStack<int size, int align> : CCAction { 88 int Size = size; 89 int Align = align; 90} 91 92/// CCAssignToStackWithShadow - Same as CCAssignToStack, but with a register 93/// to be shadowed. 94class CCAssignToStackWithShadow<int size, int align, Register reg> : 95 CCAssignToStack<size, align> { 96 Register ShadowReg = reg; 97} 98 99/// CCPassByVal - This action always matches: it assigns the value to a stack 100/// slot to implement ByVal aggregate parameter passing. Size and alignment 101/// specify the minimum size and alignment for the stack slot. 102class CCPassByVal<int size, int align> : CCAction { 103 int Size = size; 104 int Align = align; 105} 106 107/// CCPromoteToType - If applied, this promotes the specified current value to 108/// the specified type. 109class CCPromoteToType<ValueType destTy> : CCAction { 110 ValueType DestTy = destTy; 111} 112 113/// CCBitConvertToType - If applied, this bitconverts the specified current 114/// value to the specified type. 115class CCBitConvertToType<ValueType destTy> : CCAction { 116 ValueType DestTy = destTy; 117} 118 119/// CCPassIndirect - If applied, this stores the value to stack and passes the pointer 120/// as normal argument. 121class CCPassIndirect<ValueType destTy> : CCAction { 122 ValueType DestTy = destTy; 123} 124 125/// CCDelegateTo - This action invokes the specified sub-calling-convention. It 126/// is successful if the specified CC matches. 127class CCDelegateTo<CallingConv cc> : CCAction { 128 CallingConv CC = cc; 129} 130 131/// CallingConv - An instance of this is used to define each calling convention 132/// that the target supports. 133class CallingConv<list<CCAction> actions> { 134 list<CCAction> Actions = actions; 135} 136 137/// CalleeSavedRegs - A list of callee saved registers for a given calling 138/// convention. The order of registers is used by PrologEpilogInsertion when 139/// allocation stack slots for saved registers. 140/// 141/// For each CalleeSavedRegs def, TableGen will emit a FOO_SaveList array for 142/// returning from getCalleeSavedRegs(), and a FOO_RegMask bit mask suitable for 143/// returning from getCallPreservedMask(). 144class CalleeSavedRegs<dag saves> { 145 dag SaveList = saves; 146} 147