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1//===- LanaiCallingConv.td - Calling Conventions Lanai -------*- tablegen -*-===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8//9// This describes the calling conventions for the Lanai architectures.10//11//===----------------------------------------------------------------------===//12 13//===----------------------------------------------------------------------===//14// Return Value Calling Conventions15//===----------------------------------------------------------------------===//16 17// Lanai 32-bit C Calling convention.18def CC_Lanai32 : CallingConv<[19 // Promote i8/i16 args to i3220 CCIfType<[i8, i16], CCPromoteToType<i32>>,21 22 // Put argument in registers if marked 'inreg' and not a vararg call.23 CCIfNotVarArg<CCIfInReg<CCIfType<[i32],24 CCAssignToReg<[R6, R7, R18, R19]>>>>,25 26 // Otherwise they are assigned to the stack in 4-byte aligned units.27 CCAssignToStack<4, 4>28]>;29 30// Lanai 32-bit Fast Calling convention.31def CC_Lanai32_Fast : CallingConv<[32 // Promote i8/i16 args to i3233 CCIfType<[ i8, i16 ], CCPromoteToType<i32>>,34 35 // Put arguments in registers.36 CCIfNotVarArg<CCIfType<[i32], CCAssignToReg<[ R6, R7, R18, R19 ]>>>,37 38 // Otherwise they are assigned to the stack in 4-byte aligned units.39 CCAssignToStack<4, 4>40]>;41 42// Lanai 32-bit C return-value convention.43def RetCC_Lanai32 : CallingConv<[44 // Specify two registers to allow returning 64-bit results that have already45 // been lowered to 2 32-bit values.46 CCIfType<[i32], CCAssignToReg<[RV, R9]>>47]>;48 49def CSR: CalleeSavedRegs<(add)>;50