1 //===- XCoreCallingConv.td - Calling Conventions for XCore -*- 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 XCore architecture. 10 //===----------------------------------------------------------------------===// 11 12 //===----------------------------------------------------------------------===// 13 // XCore Return Value Calling Convention 14 //===----------------------------------------------------------------------===// 15 def RetCC_XCore : CallingConv<[ 16 // i32 are returned in registers R0, R1, R2, R3 17 CCIfType<[i32], CCAssignToReg<[R0, R1, R2, R3]>> 18 ]>; 19 20 //===----------------------------------------------------------------------===// 21 // XCore Argument Calling Conventions 22 //===----------------------------------------------------------------------===// 23 def CC_XCore : CallingConv<[ 24 // Promote i8/i16 arguments to i32. 25 CCIfType<[i8, i16], CCPromoteToType<i32>>, 26 27 // The 'nest' parameter, if any, is passed in R11. 28 CCIfNest<CCAssignToReg<[R11]>>, 29 30 // The first 4 integer arguments are passed in integer registers. 31 CCIfType<[i32], CCAssignToReg<[R0, R1, R2, R3]>>, 32 33 // Integer values get stored in stack slots that are 4 bytes in 34 // size and 4-byte aligned. 35 CCIfType<[i32], CCAssignToStack<4, 4>> 36 ]>; 37
