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 /// CCIfNotVarArg - If the current function is not vararg - apply the action
71 class CCIfNotVarArg<CCAction A> : CCIf<"!State.isVarArg()", A> {}
73 /// CCAssignToReg - This action matches if there is a register in the specified
74 /// list that is still available. If so, it assigns the value to the first
75 /// available register and succeeds.
76 class CCAssignToReg<list<Register> regList> : CCAction {
77 list<Register> RegList = regList;
80 /// CCAssignToRegWithShadow - Same as CCAssignToReg, but with list of registers
81 /// which became shadowed, when some register is used.
82 class CCAssignToRegWithShadow<list<Register> regList,
83 list<Register> shadowList> : CCAction {
84 list<Register> RegList = regList;
85 list<Register> ShadowRegList = shadowList;
88 /// CCAssignToStack - This action always matches: it assigns the value to a
89 /// stack slot of the specified size and alignment on the stack. If size is
90 /// zero then the ABI size is used; if align is zero then the ABI alignment
91 /// is used - these may depend on the target or subtarget.
92 class CCAssignToStack<int size, int align> : CCAction {
97 /// CCAssignToStackWithShadow - Same as CCAssignToStack, but with a list of
98 /// registers to be shadowed. Note that, unlike CCAssignToRegWithShadow, this
99 /// shadows ALL of the registers in shadowList.
100 class CCAssignToStackWithShadow<int size,
102 list<Register> shadowList> : CCAction {
105 list<Register> ShadowRegList = shadowList;
108 /// CCPassByVal - This action always matches: it assigns the value to a stack
109 /// slot to implement ByVal aggregate parameter passing. Size and alignment
110 /// specify the minimum size and alignment for the stack slot.
111 class CCPassByVal<int size, int align> : CCAction {
116 /// CCPromoteToType - If applied, this promotes the specified current value to
117 /// the specified type.
118 class CCPromoteToType<ValueType destTy> : CCAction {
119 ValueType DestTy = destTy;
122 /// CCBitConvertToType - If applied, this bitconverts the specified current
123 /// value to the specified type.
124 class CCBitConvertToType<ValueType destTy> : CCAction {
125 ValueType DestTy = destTy;
128 /// CCPassIndirect - If applied, this stores the value to stack and passes the pointer
129 /// as normal argument.
130 class CCPassIndirect<ValueType destTy> : CCAction {
131 ValueType DestTy = destTy;
134 /// CCDelegateTo - This action invokes the specified sub-calling-convention. It
135 /// is successful if the specified CC matches.
136 class CCDelegateTo<CallingConv cc> : CCAction {
140 /// CallingConv - An instance of this is used to define each calling convention
141 /// that the target supports.
142 class CallingConv<list<CCAction> actions> {
143 list<CCAction> Actions = actions;
146 /// CalleeSavedRegs - A list of callee saved registers for a given calling
147 /// convention. The order of registers is used by PrologEpilogInsertion when
148 /// allocation stack slots for saved registers.
150 /// For each CalleeSavedRegs def, TableGen will emit a FOO_SaveList array for
151 /// returning from getCalleeSavedRegs(), and a FOO_RegMask bit mask suitable for
152 /// returning from getCallPreservedMask().
153 class CalleeSavedRegs<dag saves> {
154 dag SaveList = saves;
156 // Registers that are also preserved across function calls, but should not be
157 // included in the generated FOO_SaveList array. These registers will be
158 // included in the FOO_RegMask bit mask. This can be used for registers that
159 // are saved automatically, like the SPARC register windows.