| //===- LanaiCallingConv.td - Calling Conventions Lanai -------*- tablegen -*-===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This describes the calling conventions for the Lanai architectures. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| //===----------------------------------------------------------------------===// |
| // Return Value Calling Conventions |
| //===----------------------------------------------------------------------===// |
| |
| // Lanai 32-bit C Calling convention. |
| def CC_Lanai32 : CallingConv<[ |
| // Promote i8/i16 args to i32 |
| CCIfType<[i8, i16], CCPromoteToType<i32>>, |
| |
| // Put argument in registers if marked 'inreg' and not a vararg call. |
| CCIfNotVarArg<CCIfInReg<CCIfType<[i32], |
| CCAssignToReg<[R6, R7, R18, R19]>>>>, |
| |
| // Otherwise they are assigned to the stack in 4-byte aligned units. |
| CCAssignToStack<4, 4> |
| ]>; |
| |
| // Lanai 32-bit Fast Calling convention. |
| def CC_Lanai32_Fast : CallingConv<[ |
| // Promote i8/i16 args to i32 |
| CCIfType<[ i8, i16 ], CCPromoteToType<i32>>, |
| |
| // Put arguments in registers. |
| CCIfNotVarArg<CCIfType<[i32], CCAssignToReg<[ R6, R7, R18, R19 ]>>>, |
| |
| // Otherwise they are assigned to the stack in 4-byte aligned units. |
| CCAssignToStack<4, 4> |
| ]>; |
| |
| // Lanai 32-bit C return-value convention. |
| def RetCC_Lanai32 : CallingConv<[ |
| // Specify two registers to allow returning 64-bit results that have already |
| // been lowered to 2 32-bit values. |
| CCIfType<[i32], CCAssignToReg<[RV, R9]>> |
| ]>; |
| |
| def CSR: CalleeSavedRegs<(add)>; |
