1//===- ARCCallingConv.td - Calling Conventions for ARC -----*- tablegen -*-===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// This describes the calling conventions for ARC architecture. 10//===----------------------------------------------------------------------===// 11 12//===----------------------------------------------------------------------===// 13// ARC Return Value Calling Convention 14//===----------------------------------------------------------------------===// 15def RetCC_ARC : CallingConv<[ 16 // i32 are returned in registers R0, R1, R2, R3 17 CCIfType<[i32, i64], CCAssignToReg<[R0, R1, R2, R3]>>, 18 19 // Integer values get stored in stack slots that are 4 bytes in 20 // size and 4-byte aligned. 21 CCIfType<[i64], CCAssignToStack<8, 4>>, 22 CCIfType<[i32], CCAssignToStack<4, 4>> 23]>; 24 25//===----------------------------------------------------------------------===// 26// ARC Argument Calling Conventions 27//===----------------------------------------------------------------------===// 28def CC_ARC : CallingConv<[ 29 // Promote i8/i16 arguments to i32. 30 CCIfType<[i8, i16], CCPromoteToType<i32>>, 31 32 // The first 8 integer arguments are passed in integer registers. 33 CCIfType<[i32, i64], CCAssignToReg<[R0, R1, R2, R3, R4, R5, R6, R7]>>, 34 35 // Integer values get stored in stack slots that are 4 bytes in 36 // size and 4-byte aligned. 37 CCIfType<[i64], CCAssignToStack<8, 4>>, 38 CCIfType<[i32], CCAssignToStack<4, 4>> 39]>; 40 41def CSR_ARC : CalleeSavedRegs<(add (sequence "R%u", 13, 25), GP, FP)>; 42