mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-09-01 04:29:57 +00:00
ReplaceNodeResults: rather than returning a node which must have the same number of results as the original node (which means mucking around with MERGE_VALUES, and which is also easy to get wrong since SelectionDAG folding may mean you don't get the node you expect), return the results in a vector. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60348 91177308-0d34-0410-b5e6-96231b3b80d8
122 lines
4.5 KiB
C++
122 lines
4.5 KiB
C++
//===-- PIC16ISelLowering.h - PIC16 DAG Lowering Interface ------*- C++ -*-===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file defines the interfaces that PIC16 uses to lower LLVM code into a
|
|
// selection DAG.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef PIC16ISELLOWERING_H
|
|
#define PIC16ISELLOWERING_H
|
|
|
|
#include "PIC16.h"
|
|
#include "PIC16Subtarget.h"
|
|
#include "llvm/CodeGen/SelectionDAG.h"
|
|
#include "llvm/Target/TargetLowering.h"
|
|
|
|
namespace llvm {
|
|
namespace PIC16ISD {
|
|
enum NodeType {
|
|
// Start the numbering from where ISD NodeType finishes.
|
|
FIRST_NUMBER = ISD::BUILTIN_OP_END,
|
|
|
|
Lo, // Low 8-bits of GlobalAddress.
|
|
Hi, // High 8-bits of GlobalAddress.
|
|
PIC16Load,
|
|
PIC16Store,
|
|
Banksel,
|
|
MTLO,
|
|
MTHI,
|
|
BCF,
|
|
LSLF, // PIC16 Logical shift left
|
|
LRLF, // PIC16 Logical shift right
|
|
RLF, // Rotate left through carry
|
|
RRF, // Rotate right through carry
|
|
Dummy
|
|
};
|
|
|
|
// Keep track of different address spaces.
|
|
enum AddressSpace {
|
|
RAM_SPACE = 0, // RAM address space
|
|
ROM_SPACE = 1 // ROM address space number is 1
|
|
};
|
|
}
|
|
|
|
//===--------------------------------------------------------------------===//
|
|
// TargetLowering Implementation
|
|
//===--------------------------------------------------------------------===//
|
|
class PIC16TargetLowering : public TargetLowering {
|
|
public:
|
|
explicit PIC16TargetLowering(PIC16TargetMachine &TM);
|
|
|
|
/// getTargetNodeName - This method returns the name of a target specific
|
|
/// DAG node.
|
|
virtual const char *getTargetNodeName(unsigned Opcode) const;
|
|
SDValue LowerOperation(SDValue Op, SelectionDAG &DAG);
|
|
SDValue LowerFORMAL_ARGUMENTS(SDValue Op, SelectionDAG &DAG);
|
|
SDValue LowerADDE(SDValue Op, SelectionDAG &DAG);
|
|
SDValue LowerADDC(SDValue Op, SelectionDAG &DAG);
|
|
SDValue LowerSUBE(SDValue Op, SelectionDAG &DAG);
|
|
SDValue LowerSUBC(SDValue Op, SelectionDAG &DAG);
|
|
SDValue LowerBinOp(SDValue Op, SelectionDAG &DAG);
|
|
|
|
/// ReplaceNodeResults - Replace the results of node with an illegal result
|
|
/// type with new values built out of custom code.
|
|
///
|
|
virtual void ReplaceNodeResults(SDNode *N, SmallVectorImpl<SDValue>&Results,
|
|
SelectionDAG &DAG);
|
|
|
|
SDValue ExpandStore(SDNode *N, SelectionDAG &DAG);
|
|
SDValue ExpandLoad(SDNode *N, SelectionDAG &DAG);
|
|
// SDNode *ExpandAdd(SDNode *N, SelectionDAG &DAG);
|
|
SDValue ExpandGlobalAddress(SDNode *N, SelectionDAG &DAG);
|
|
SDValue ExpandShift(SDNode *N, SelectionDAG &DAG);
|
|
|
|
SDValue PerformDAGCombine(SDNode *N, DAGCombinerInfo &DCI) const;
|
|
SDValue PerformPIC16LoadCombine(SDNode *N, DAGCombinerInfo &DCI) const;
|
|
|
|
private:
|
|
// If the Node is a BUILD_PAIR representing representing an Address
|
|
// then this function will return true
|
|
bool isDirectAddress(const SDValue &Op);
|
|
|
|
// If the Node is a DirectAddress in ROM_SPACE then this
|
|
// function will return true
|
|
bool isRomAddress(const SDValue &Op);
|
|
|
|
// To extract chain value from the SDValue Nodes
|
|
// This function will help to maintain the chain extracting
|
|
// code at one place. In case of any change in future it will
|
|
// help maintain the code
|
|
SDValue getChain(SDValue &Op);
|
|
|
|
|
|
// Extract the Lo and Hi component of Op.
|
|
void GetExpandedParts(SDValue Op, SelectionDAG &DAG, SDValue &Lo,
|
|
SDValue &Hi);
|
|
|
|
|
|
// Load pointer can be a direct or indirect address. In PIC16 direct
|
|
// addresses need Banksel and Indirect addresses need to be loaded to
|
|
// FSR first. Handle address specific cases here.
|
|
void LegalizeAddress(SDValue Ptr, SelectionDAG &DAG, SDValue &Chain,
|
|
SDValue &NewPtr, unsigned &Offset);
|
|
|
|
// We can not have both operands of a binary operation in W.
|
|
// This function is used to put one operand on stack and generate a load.
|
|
SDValue ConvertToMemOperand(SDValue Op, SelectionDAG &DAG);
|
|
|
|
/// Subtarget - Keep a pointer to the PIC16Subtarget around so that we can
|
|
/// make the right decision when generating code for different targets.
|
|
const PIC16Subtarget *Subtarget;
|
|
};
|
|
} // namespace llvm
|
|
|
|
#endif // PIC16ISELLOWERING_H
|