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 /// CCIfConsecutiveRegs - If the current argument has InConsecutiveRegs
46 /// parameter attribute, apply Action A.
47 class CCIfConsecutiveRegs<CCAction A> : CCIf<"ArgFlags.isInConsecutiveRegs()", A> {
50 /// CCIfCC - Match if the current calling convention is 'CC'.
51 class CCIfCC<string CC, CCAction A>
52 : CCIf<!strconcat("State.getCallingConv() == ", CC), A> {}
54 /// CCIfInReg - If this argument is marked with the 'inreg' attribute, apply
55 /// the specified action.
56 class CCIfInReg<CCAction A> : CCIf<"ArgFlags.isInReg()", A> {}
58 /// CCIfNest - If this argument is marked with the 'nest' attribute, apply
59 /// the specified action.
60 class CCIfNest<CCAction A> : CCIf<"ArgFlags.isNest()", A> {}
62 /// CCIfSplit - If this argument is marked with the 'split' attribute, apply
63 /// the specified action.
64 class CCIfSplit<CCAction A> : CCIf<"ArgFlags.isSplit()", A> {}
66 /// CCIfSRet - If this argument is marked with the 'sret' attribute, apply
67 /// the specified action.
68 class CCIfSRet<CCAction A> : CCIf<"ArgFlags.isSRet()", A> {}
70 /// CCIfVarArg - If the current function is vararg - apply the action
71 class CCIfVarArg<CCAction A> : CCIf<"State.isVarArg()", A> {}
73 /// CCIfNotVarArg - If the current function is not vararg - apply the action
74 class CCIfNotVarArg<CCAction A> : CCIf<"!State.isVarArg()", A> {}
76 /// CCAssignToReg - This action matches if there is a register in the specified
77 /// list that is still available. If so, it assigns the value to the first
78 /// available register and succeeds.
79 class CCAssignToReg<list<Register> regList> : CCAction {
80 list<Register> RegList = regList;
83 /// CCAssignToRegWithShadow - Same as CCAssignToReg, but with list of registers
84 /// which became shadowed, when some register is used.
85 class CCAssignToRegWithShadow<list<Register> regList,
86 list<Register> shadowList> : CCAction {
87 list<Register> RegList = regList;
88 list<Register> ShadowRegList = shadowList;
91 /// CCAssignToStack - This action always matches: it assigns the value to a
92 /// stack slot of the specified size and alignment on the stack. If size is
93 /// zero then the ABI size is used; if align is zero then the ABI alignment
94 /// is used - these may depend on the target or subtarget.
95 class CCAssignToStack<int size, int align> : CCAction {
100 /// CCAssignToStackWithShadow - Same as CCAssignToStack, but with a list of
101 /// registers to be shadowed. Note that, unlike CCAssignToRegWithShadow, this
102 /// shadows ALL of the registers in shadowList.
103 class CCAssignToStackWithShadow<int size,
105 list<Register> shadowList> : CCAction {
108 list<Register> ShadowRegList = shadowList;
111 /// CCPassByVal - This action always matches: it assigns the value to a stack
112 /// slot to implement ByVal aggregate parameter passing. Size and alignment
113 /// specify the minimum size and alignment for the stack slot.
114 class CCPassByVal<int size, int align> : CCAction {
119 /// CCPromoteToType - If applied, this promotes the specified current value to
120 /// the specified type.
121 class CCPromoteToType<ValueType destTy> : CCAction {
122 ValueType DestTy = destTy;
125 /// CCPromoteToUpperBitsInType - If applied, this promotes the specified current
126 /// value to the specified type and shifts the value into the upper bits.
127 class CCPromoteToUpperBitsInType<ValueType destTy> : CCAction {
128 ValueType DestTy = destTy;
131 /// CCBitConvertToType - If applied, this bitconverts the specified current
132 /// value to the specified type.
133 class CCBitConvertToType<ValueType destTy> : CCAction {
134 ValueType DestTy = destTy;
137 /// CCPassIndirect - If applied, this stores the value to stack and passes the pointer
138 /// as normal argument.
139 class CCPassIndirect<ValueType destTy> : CCAction {
140 ValueType DestTy = destTy;
143 /// CCDelegateTo - This action invokes the specified sub-calling-convention. It
144 /// is successful if the specified CC matches.
145 class CCDelegateTo<CallingConv cc> : CCAction {
149 /// CallingConv - An instance of this is used to define each calling convention
150 /// that the target supports.
151 class CallingConv<list<CCAction> actions> {
152 list<CCAction> Actions = actions;
156 /// CustomCallingConv - An instance of this is used to declare calling
157 /// conventions that are implemented using a custom function of the same name.
158 class CustomCallingConv : CallingConv<[]> {
162 /// CalleeSavedRegs - A list of callee saved registers for a given calling
163 /// convention. The order of registers is used by PrologEpilogInsertion when
164 /// allocation stack slots for saved registers.
166 /// For each CalleeSavedRegs def, TableGen will emit a FOO_SaveList array for
167 /// returning from getCalleeSavedRegs(), and a FOO_RegMask bit mask suitable for
168 /// returning from getCallPreservedMask().
169 class CalleeSavedRegs<dag saves> {
170 dag SaveList = saves;
172 // Registers that are also preserved across function calls, but should not be
173 // included in the generated FOO_SaveList array. These registers will be
174 // included in the FOO_RegMask bit mask. This can be used for registers that
175 // are saved automatically, like the SPARC register windows.