1 //===- TargetCallingConv.td - Target Calling Conventions ---*- tablegen -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file defines the target-independent interfaces with which targets
11 // describe their calling conventions.
13 //===----------------------------------------------------------------------===//
18 /// CCCustom - Calls a custom arg handling function.
19 class CCCustom<string fn> : CCAction {
23 /// CCPredicateAction - Instances of this class check some predicate, then
24 /// delegate to another action if the predicate is true.
25 class CCPredicateAction<CCAction A> : CCAction {
26 CCAction SubAction = A;
29 /// CCIfType - If the current argument is one of the specified types, apply
31 class CCIfType<list<ValueType> vts, CCAction A> : CCPredicateAction<A> {
32 list<ValueType> VTs = vts;
35 /// CCIf - If the predicate matches, apply A.
36 class CCIf<string predicate, CCAction A> : CCPredicateAction<A> {
37 string Predicate = predicate;
40 /// CCIfByVal - If the current argument has ByVal parameter attribute, apply
42 class CCIfByVal<CCAction A> : CCIf<"ArgFlags.isByVal()", A> {
45 /// CCIfSwiftSelf - If the current argument has swiftself parameter attribute,
47 class CCIfSwiftSelf<CCAction A> : CCIf<"ArgFlags.isSwiftSelf()", A> {
50 /// CCIfSwiftError - If the current argument has swifterror parameter attribute,
52 class CCIfSwiftError<CCAction A> : CCIf<"ArgFlags.isSwiftError()", A> {
55 /// CCIfConsecutiveRegs - If the current argument has InConsecutiveRegs
56 /// parameter attribute, apply Action A.
57 class CCIfConsecutiveRegs<CCAction A> : CCIf<"ArgFlags.isInConsecutiveRegs()", A> {
60 /// CCIfCC - Match if the current calling convention is 'CC'.
61 class CCIfCC<string CC, CCAction A>
62 : CCIf<!strconcat("State.getCallingConv() == ", CC), A> {}
64 /// CCIfInReg - If this argument is marked with the 'inreg' attribute, apply
65 /// the specified action.
66 class CCIfInReg<CCAction A> : CCIf<"ArgFlags.isInReg()", A> {}
68 /// CCIfNest - If this argument is marked with the 'nest' attribute, apply
69 /// the specified action.
70 class CCIfNest<CCAction A> : CCIf<"ArgFlags.isNest()", A> {}
72 /// CCIfSplit - If this argument is marked with the 'split' attribute, apply
73 /// the specified action.
74 class CCIfSplit<CCAction A> : CCIf<"ArgFlags.isSplit()", A> {}
76 /// CCIfSRet - If this argument is marked with the 'sret' attribute, apply
77 /// the specified action.
78 class CCIfSRet<CCAction A> : CCIf<"ArgFlags.isSRet()", A> {}
80 /// CCIfVarArg - If the current function is vararg - apply the action
81 class CCIfVarArg<CCAction A> : CCIf<"State.isVarArg()", A> {}
83 /// CCIfNotVarArg - If the current function is not vararg - apply the action
84 class CCIfNotVarArg<CCAction A> : CCIf<"!State.isVarArg()", A> {}
86 /// CCAssignToReg - This action matches if there is a register in the specified
87 /// list that is still available. If so, it assigns the value to the first
88 /// available register and succeeds.
89 class CCAssignToReg<list<Register> regList> : CCAction {
90 list<Register> RegList = regList;
93 /// CCAssignToRegWithShadow - Same as CCAssignToReg, but with list of registers
94 /// which became shadowed, when some register is used.
95 class CCAssignToRegWithShadow<list<Register> regList,
96 list<Register> shadowList> : CCAction {
97 list<Register> RegList = regList;
98 list<Register> ShadowRegList = shadowList;
101 /// CCAssignToStack - This action always matches: it assigns the value to a
102 /// stack slot of the specified size and alignment on the stack. If size is
103 /// zero then the ABI size is used; if align is zero then the ABI alignment
104 /// is used - these may depend on the target or subtarget.
105 class CCAssignToStack<int size, int align> : CCAction {
110 /// CCAssignToStackWithShadow - Same as CCAssignToStack, but with a list of
111 /// registers to be shadowed. Note that, unlike CCAssignToRegWithShadow, this
112 /// shadows ALL of the registers in shadowList.
113 class CCAssignToStackWithShadow<int size,
115 list<Register> shadowList> : CCAction {
118 list<Register> ShadowRegList = shadowList;
121 /// CCPassByVal - This action always matches: it assigns the value to a stack
122 /// slot to implement ByVal aggregate parameter passing. Size and alignment
123 /// specify the minimum size and alignment for the stack slot.
124 class CCPassByVal<int size, int align> : CCAction {
129 /// CCPromoteToType - If applied, this promotes the specified current value to
130 /// the specified type.
131 class CCPromoteToType<ValueType destTy> : CCAction {
132 ValueType DestTy = destTy;
135 /// CCPromoteToUpperBitsInType - If applied, this promotes the specified current
136 /// value to the specified type and shifts the value into the upper bits.
137 class CCPromoteToUpperBitsInType<ValueType destTy> : CCAction {
138 ValueType DestTy = destTy;
141 /// CCBitConvertToType - If applied, this bitconverts the specified current
142 /// value to the specified type.
143 class CCBitConvertToType<ValueType destTy> : CCAction {
144 ValueType DestTy = destTy;
147 /// CCPassIndirect - If applied, this stores the value to stack and passes the pointer
148 /// as normal argument.
149 class CCPassIndirect<ValueType destTy> : CCAction {
150 ValueType DestTy = destTy;
153 /// CCDelegateTo - This action invokes the specified sub-calling-convention. It
154 /// is successful if the specified CC matches.
155 class CCDelegateTo<CallingConv cc> : CCAction {
159 /// CallingConv - An instance of this is used to define each calling convention
160 /// that the target supports.
161 class CallingConv<list<CCAction> actions> {
162 list<CCAction> Actions = actions;
166 /// CustomCallingConv - An instance of this is used to declare calling
167 /// conventions that are implemented using a custom function of the same name.
168 class CustomCallingConv : CallingConv<[]> {
172 /// CalleeSavedRegs - A list of callee saved registers for a given calling
173 /// convention. The order of registers is used by PrologEpilogInsertion when
174 /// allocation stack slots for saved registers.
176 /// For each CalleeSavedRegs def, TableGen will emit a FOO_SaveList array for
177 /// returning from getCalleeSavedRegs(), and a FOO_RegMask bit mask suitable for
178 /// returning from getCallPreservedMask().
179 class CalleeSavedRegs<dag saves> {
180 dag SaveList = saves;
182 // Registers that are also preserved across function calls, but should not be
183 // included in the generated FOO_SaveList array. These registers will be
184 // included in the FOO_RegMask bit mask. This can be used for registers that
185 // are saved automatically, like the SPARC register windows.