src/llvm/lib/Target/MSP430/MSP430CallingConv.td

   1 //==- MSP430CallingConv.td - Calling Conventions for MSP430 -*- 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 MSP430 architecture.
  10 //===----------------------------------------------------------------------===//
  11
  12 //===----------------------------------------------------------------------===//
  13 // MSP430 Return Value Calling Convention
  14 //===----------------------------------------------------------------------===//
  15 def RetCC_MSP430 : CallingConv<[
  16   // i8 are returned in registers R15B, R14B, R13B, R12B
  17   CCIfType<[i8], CCAssignToReg<[R15B, R14B, R13B, R12B]>>,
  18
  19   // i16 are returned in registers R15, R14, R13, R12
  20   CCIfType<[i16], CCAssignToReg<[R15, R14, R13, R12]>>
  21 ]>;
  22
  23 //===----------------------------------------------------------------------===//
  24 // MSP430 Argument Calling Conventions
  25 //===----------------------------------------------------------------------===//
  26 def CC_MSP430_AssignStack : CallingConv<[
  27   // Pass by value if the byval attribute is given
  28   CCIfByVal<CCPassByVal<2, 2>>,
  29
  30   // Promote i8 arguments to i16.
  31   CCIfType<[i8], CCPromoteToType<i16>>,
  32
  33   // Integer values get stored in stack slots that are 2 bytes in
  34   // size and 2-byte aligned.
  35   CCIfType<[i16], CCAssignToStack<2, 2>>
  36 ]>;
  37