8f324bb1a4
Previously some targets printed their own message at the start of Select to indicate what they were selecting. For the targets that didn't, it means there was no print of the root node before any custom handling in the target executed. So if the target did something custom and never called SelectNodeCommon, no print would be made. For the targets that did print a message in Select, if they didn't custom handle a node SelectNodeCommon would reprint the root node before walking the isel table. It seems better to just print the message before the call to Select so all targets behave the same. And then remove the root node printing from SelectNodeCommon and just leave a message that says we're starting the table search. There were also some oddities in blank line behavior. Usually due to a \n after a call to SelectionDAGNode::dump which already inserted a new line. llvm-svn: 323551
77 lines
2.4 KiB
C++
77 lines
2.4 KiB
C++
//===-- Nios2ISelDAGToDAG.cpp - A Dag to Dag Inst Selector for Nios2 ------===//
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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 NIOS2 target.
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//
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//===----------------------------------------------------------------------===//
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#include "Nios2.h"
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#include "Nios2TargetMachine.h"
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#include "llvm/CodeGen/SelectionDAGISel.h"
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#include "llvm/Support/Debug.h"
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using namespace llvm;
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#define DEBUG_TYPE "nios2-isel"
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//===----------------------------------------------------------------------===//
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// Instruction Selector Implementation
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//===----------------------------------------------------------------------===//
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//===----------------------------------------------------------------------===//
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// Nios2DAGToDAGISel - NIOS2 specific code to select NIOS2 machine
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// instructions for SelectionDAG operations.
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//===----------------------------------------------------------------------===//
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namespace {
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class Nios2DAGToDAGISel : public SelectionDAGISel {
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/// Subtarget - Keep a pointer to the Nios2 Subtarget around so that we can
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/// make the right decision when generating code for different targets.
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const Nios2Subtarget *Subtarget;
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public:
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explicit Nios2DAGToDAGISel(Nios2TargetMachine &TM, CodeGenOpt::Level OL)
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: SelectionDAGISel(TM, OL) {}
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bool runOnMachineFunction(MachineFunction &MF) override {
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Subtarget = &MF.getSubtarget<Nios2Subtarget>();
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return SelectionDAGISel::runOnMachineFunction(MF);
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}
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void Select(SDNode *N) override;
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// Pass Name
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StringRef getPassName() const override {
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return "NIOS2 DAG->DAG Pattern Instruction Selection";
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}
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#include "Nios2GenDAGISel.inc"
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};
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} // namespace
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// Select instructions not customized! Used for
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// expanded, promoted and normal instructions
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void Nios2DAGToDAGISel::Select(SDNode *Node) {
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// If we have a custom node, we already have selected!
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if (Node->isMachineOpcode()) {
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DEBUG(errs() << "== "; Node->dump(CurDAG); errs() << "\n");
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Node->setNodeId(-1);
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return;
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}
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// Select the default instruction
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SelectCode(Node);
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}
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FunctionPass *llvm::createNios2ISelDag(Nios2TargetMachine &TM,
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CodeGenOpt::Level OptLevel) {
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return new Nios2DAGToDAGISel(TM, OptLevel);
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}
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