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Targets can now add CalleeSavedRegs defs to their *CallingConv.td file. TableGen will use this to create a *_SaveList array suitable for returning from getCalleeSavedRegs() as well as a *_RegMask bit mask suitable for returning from getCallPreservedMask(). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@148346 91177308-0d34-0410-b5e6-96231b3b80d8
147 lines
5.3 KiB
TableGen
147 lines
5.3 KiB
TableGen
//===- TargetCallingConv.td - Target Calling Conventions ---*- tablegen -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file defines the target-independent interfaces with which targets
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// describe their calling conventions.
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//
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//===----------------------------------------------------------------------===//
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class CCAction;
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class CallingConv;
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/// CCCustom - Calls a custom arg handling function.
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class CCCustom<string fn> : CCAction {
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string FuncName = fn;
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}
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/// CCPredicateAction - Instances of this class check some predicate, then
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/// delegate to another action if the predicate is true.
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class CCPredicateAction<CCAction A> : CCAction {
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CCAction SubAction = A;
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}
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/// CCIfType - If the current argument is one of the specified types, apply
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/// Action A.
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class CCIfType<list<ValueType> vts, CCAction A> : CCPredicateAction<A> {
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list<ValueType> VTs = vts;
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}
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/// CCIf - If the predicate matches, apply A.
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class CCIf<string predicate, CCAction A> : CCPredicateAction<A> {
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string Predicate = predicate;
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}
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/// CCIfByVal - If the current argument has ByVal parameter attribute, apply
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/// Action A.
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class CCIfByVal<CCAction A> : CCIf<"ArgFlags.isByVal()", A> {
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}
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/// CCIfCC - Match if the current calling convention is 'CC'.
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class CCIfCC<string CC, CCAction A>
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: CCIf<!strconcat("State.getCallingConv() == ", CC), A> {}
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/// CCIfInReg - If this argument is marked with the 'inreg' attribute, apply
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/// the specified action.
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class CCIfInReg<CCAction A> : CCIf<"ArgFlags.isInReg()", A> {}
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/// CCIfNest - If this argument is marked with the 'nest' attribute, apply
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/// the specified action.
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class CCIfNest<CCAction A> : CCIf<"ArgFlags.isNest()", A> {}
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/// CCIfSplit - If this argument is marked with the 'split' attribute, apply
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/// the specified action.
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class CCIfSplit<CCAction A> : CCIf<"ArgFlags.isSplit()", A> {}
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/// CCIfSRet - If this argument is marked with the 'sret' attribute, apply
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/// the specified action.
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class CCIfSRet<CCAction A> : CCIf<"ArgFlags.isSRet()", A> {}
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/// CCIfNotVarArg - If the current function is not vararg - apply the action
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class CCIfNotVarArg<CCAction A> : CCIf<"!State.isVarArg()", A> {}
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/// CCAssignToReg - This action matches if there is a register in the specified
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/// list that is still available. If so, it assigns the value to the first
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/// available register and succeeds.
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class CCAssignToReg<list<Register> regList> : CCAction {
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list<Register> RegList = regList;
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}
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/// CCAssignToRegWithShadow - Same as CCAssignToReg, but with list of registers
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/// which became shadowed, when some register is used.
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class CCAssignToRegWithShadow<list<Register> regList,
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list<Register> shadowList> : CCAction {
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list<Register> RegList = regList;
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list<Register> ShadowRegList = shadowList;
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}
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/// CCAssignToStack - This action always matches: it assigns the value to a
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/// stack slot of the specified size and alignment on the stack. If size is
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/// zero then the ABI size is used; if align is zero then the ABI alignment
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/// is used - these may depend on the target or subtarget.
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class CCAssignToStack<int size, int align> : CCAction {
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int Size = size;
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int Align = align;
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}
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/// CCAssignToStackWithShadow - Same as CCAssignToStack, but with a register
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/// to be shadowed.
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class CCAssignToStackWithShadow<int size, int align, Register reg> :
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CCAssignToStack<size, align> {
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Register ShadowReg = reg;
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}
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/// CCPassByVal - This action always matches: it assigns the value to a stack
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/// slot to implement ByVal aggregate parameter passing. Size and alignment
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/// specify the minimum size and alignment for the stack slot.
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class CCPassByVal<int size, int align> : CCAction {
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int Size = size;
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int Align = align;
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}
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/// CCPromoteToType - If applied, this promotes the specified current value to
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/// the specified type.
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class CCPromoteToType<ValueType destTy> : CCAction {
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ValueType DestTy = destTy;
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}
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/// CCBitConvertToType - If applied, this bitconverts the specified current
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/// value to the specified type.
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class CCBitConvertToType<ValueType destTy> : CCAction {
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ValueType DestTy = destTy;
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}
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/// CCPassIndirect - If applied, this stores the value to stack and passes the pointer
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/// as normal argument.
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class CCPassIndirect<ValueType destTy> : CCAction {
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ValueType DestTy = destTy;
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}
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/// CCDelegateTo - This action invokes the specified sub-calling-convention. It
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/// is successful if the specified CC matches.
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class CCDelegateTo<CallingConv cc> : CCAction {
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CallingConv CC = cc;
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}
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/// CallingConv - An instance of this is used to define each calling convention
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/// that the target supports.
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class CallingConv<list<CCAction> actions> {
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list<CCAction> Actions = actions;
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}
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/// CalleeSavedRegs - A list of callee saved registers for a given calling
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/// convention. The order of registers is used by PrologEpilogInsertion when
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/// allocation stack slots for saved registers.
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///
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/// For each CalleeSavedRegs def, TableGen will emit a FOO_SaveList array for
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/// returning from getCalleeSavedRegs(), and a FOO_RegMask bit mask suitable for
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/// returning from getCallPreservedMask().
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class CalleeSavedRegs<dag saves> {
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dag SaveList = saves;
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}
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