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https://github.com/c64scene-ar/llvm-6502.git
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7c306da505
DoInstructionSelection. Inline "SelectRoot" into it from DAGISelHeader. Sink some other stuff out of DAGISelHeader into SDISel. Eliminate the various 'Indent' stuff from various targets, which dates to when isel was recursive. 17 files changed, 114 insertions(+), 430 deletions(-) git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@97555 91177308-0d34-0410-b5e6-96231b3b80d8
51 lines
1.5 KiB
C++
51 lines
1.5 KiB
C++
//===-- PIC16ISelDAGToDAG.cpp - A dag to dag inst selector for PIC16 ------===//
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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 an instruction selector for the PIC16 target.
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//
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//===----------------------------------------------------------------------===//
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#define DEBUG_TYPE "pic16-isel"
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#include "llvm/Support/ErrorHandling.h"
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#include "PIC16ISelDAGToDAG.h"
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using namespace llvm;
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/// createPIC16ISelDag - This pass converts a legalized DAG into a
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/// PIC16-specific DAG, ready for instruction scheduling.
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FunctionPass *llvm::createPIC16ISelDag(PIC16TargetMachine &TM) {
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return new PIC16DAGToDAGISel(TM);
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}
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/// Select - Select instructions not customized! Used for
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/// expanded, promoted and normal instructions.
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SDNode* PIC16DAGToDAGISel::Select(SDNode *N) {
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// Select the default instruction.
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SDNode *ResNode = SelectCode(N);
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return ResNode;
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}
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// SelectDirectAddr - Match a direct address for DAG.
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// A direct address could be a globaladdress or externalsymbol.
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bool PIC16DAGToDAGISel::SelectDirectAddr(SDNode *Op, SDValue N,
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SDValue &Address) {
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// Return true if TGA or ES.
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if (N.getOpcode() == ISD::TargetGlobalAddress
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|| N.getOpcode() == ISD::TargetExternalSymbol) {
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Address = N;
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return true;
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}
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return false;
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}
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