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a1d10f171e
This patch includes all missing functionality needed to provide first compilation of a simple program that just returns from a function. I've added a test case that checks for "ret" instruction printed in assembly output. Patch by Andrei Grischenko (andrei.l.grischenko@intel.com) Differential revision: https://reviews.llvm.org/D39688 llvm-svn: 320035
64 lines
2.0 KiB
C++
64 lines
2.0 KiB
C++
//===-- Nios2ISelLowering.h - Nios2 DAG Lowering Interface ------*- C++ -*-===//
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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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//
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// This file defines the interfaces that Nios2 uses to lower LLVM code into a
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// selection DAG.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_LIB_TARGET_NIOS2_NIOS2ISELLOWERING_H
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#define LLVM_LIB_TARGET_NIOS2_NIOS2ISELLOWERING_H
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#include "Nios2.h"
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#include "llvm/CodeGen/TargetLowering.h"
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namespace llvm {
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class Nios2Subtarget;
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namespace Nios2ISD {
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enum NodeType {
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// Start the numbering from where ISD NodeType finishes.
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FIRST_NUMBER = ISD::BUILTIN_OP_END,
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// Get the Higher 16 bits from a 32-bit immediate
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// No relation with Nios2 Hi register
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Hi,
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// Get the Lower 16 bits from a 32-bit immediate
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// No relation with Nios2 Lo register
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Lo,
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// Return
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Ret
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};
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}
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class Nios2TargetLowering : public TargetLowering {
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const Nios2Subtarget *Subtarget;
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public:
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Nios2TargetLowering(const TargetMachine &TM, const Nios2Subtarget &STI);
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/// getTargetNodeName - This method returns the name of a target specific
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// DAG node.
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const char *getTargetNodeName(unsigned Opcode) const override;
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SDValue LowerFormalArguments(SDValue Chain, CallingConv::ID CallConv,
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bool IsVarArg,
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const SmallVectorImpl<ISD::InputArg> &Ins,
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const SDLoc &dl, SelectionDAG &DAG,
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SmallVectorImpl<SDValue> &InVals) const override;
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SDValue LowerReturn(SDValue Chain, CallingConv::ID CallConv, bool isVarArg,
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const SmallVectorImpl<ISD::OutputArg> &Outs,
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const SmallVectorImpl<SDValue> &OutVals, const SDLoc &dl,
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SelectionDAG &DAG) const override;
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};
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} // end namespace llvm
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#endif // NIOS2_ISELLOWERING_H
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