forked from OSchip/llvm-project
41 lines
1.6 KiB
TableGen
41 lines
1.6 KiB
TableGen
//==- MSP430CallingConv.td - Calling Conventions for MSP430 -*- tablegen -*-==//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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// This describes the calling conventions for MSP430 architecture.
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//===----------------------------------------------------------------------===//
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//===----------------------------------------------------------------------===//
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// MSP430 Return Value Calling Convention
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//===----------------------------------------------------------------------===//
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def RetCC_MSP430 : CallingConv<[
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// i8 are returned in registers R15B, R14B, R13B, R12B
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CCIfType<[i8], CCAssignToReg<[R15B, R14B, R13B, R12B]>>,
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// i16 are returned in registers R15, R14, R13, R12
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CCIfType<[i16], CCAssignToReg<[R15W, R14W, R13W, R12W]>>
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]>;
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//===----------------------------------------------------------------------===//
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// MSP430 Argument Calling Conventions
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//===----------------------------------------------------------------------===//
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def CC_MSP430 : CallingConv<[
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// Pass by value if the byval attribute is given
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CCIfByVal<CCPassByVal<2, 2>>,
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// Promote i8 arguments to i16.
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CCIfType<[i8], CCPromoteToType<i16>>,
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// The first 4 integer arguments of non-varargs functions are passed in
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// integer registers.
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CCIfNotVarArg<CCIfType<[i16], CCAssignToReg<[R15W, R14W, R13W, R12W]>>>,
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// Integer values get stored in stack slots that are 2 bytes in
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// size and 2-byte aligned.
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CCIfType<[i16], CCAssignToStack<2, 2>>
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]>;
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