1//===- ARCCallingConv.td - Calling Conventions for ARC -----*- 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-exception 6// 7//===----------------------------------------------------------------------===// 8// This describes the calling conventions for ARC architecture. 9//===----------------------------------------------------------------------===// 10 11//===----------------------------------------------------------------------===// 12// ARC Return Value Calling Convention 13//===----------------------------------------------------------------------===// 14def RetCC_ARC : CallingConv<[ 15 // i32 are returned in registers R0, R1, R2, R3 16 CCIfType<[i32, i64], CCAssignToReg<[R0, R1, R2, R3]>>, 17 18 // Integer values get stored in stack slots that are 4 bytes in 19 // size and 4-byte aligned. 20 CCIfType<[i64], CCAssignToStack<8, 4>>, 21 CCIfType<[i32], CCAssignToStack<4, 4>> 22]>; 23 24//===----------------------------------------------------------------------===// 25// ARC Argument Calling Conventions 26//===----------------------------------------------------------------------===// 27def CC_ARC : CallingConv<[ 28 // Promote i8/i16 arguments to i32. 29 CCIfType<[i8, i16], CCPromoteToType<i32>>, 30 31 // The first 8 integer arguments are passed in integer registers. 32 CCIfType<[i32, i64], CCAssignToReg<[R0, R1, R2, R3, R4, R5, R6, R7]>>, 33 34 // Integer values get stored in stack slots that are 4 bytes in 35 // size and 4-byte aligned. 36 CCIfType<[i64], CCAssignToStack<8, 4>>, 37 CCIfType<[i32], CCAssignToStack<4, 4>> 38]>; 39 40def CSR_ARC : CalleeSavedRegs<(add (sequence "R%u", 13, 25), GP, FP)>; 41