mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-14 11:32:34 +00:00
Moved erase edge functions to class SchedGraph.
Add new dummy edges when deleting existing edges. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@609 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Vikram S. Adve
parent
851d44c522
commit
8b6d245693
@ -1,15 +1,16 @@
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/****************************************************************************
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* File:
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* SchedGraph.cpp
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*
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* Purpose:
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* Scheduling graph based on SSA graph plus extra dependence edges
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* capturing dependences due to machine resources (machine registers,
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* CC registers, and any others).
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*
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* History:
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* 7/20/01 - Vikram Adve - Created
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***************************************************************************/
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// $Id$
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//***************************************************************************
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// File:
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// SchedGraph.cpp
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//
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// Purpose:
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// Scheduling graph based on SSA graph plus extra dependence edges
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// capturing dependences due to machine resources (machine registers,
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// CC registers, and any others).
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//
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// History:
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// 7/20/01 - Vikram Adve - Created
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//**************************************************************************/
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#include "SchedGraph.h"
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#include "llvm/InstrTypes.h"
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@ -17,7 +18,8 @@
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#include "llvm/BasicBlock.h"
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#include "llvm/Method.h"
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#include "llvm/CodeGen/MachineInstr.h"
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#include "llvm/Target/InstInfo.h"
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#include "llvm/Target/MachineInstrInfo.h"
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#include "llvm/Target/MachineRegInfo.h"
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#include "llvm/Support/StringExtras.h"
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#include <algorithm>
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@ -95,6 +97,11 @@ SchedGraphEdge::SchedGraphEdge(SchedGraphNode* _src,
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sink->addInEdge(this);
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}
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/*dtor*/
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SchedGraphEdge::~SchedGraphEdge()
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{
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}
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void SchedGraphEdge::dump(int indent=0) const {
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printIndent(indent); cout << *this;
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}
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@ -127,9 +134,6 @@ SchedGraphNode::SchedGraphNode(unsigned int _nodeId,
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/*dtor*/
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SchedGraphNode::~SchedGraphNode()
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{
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// a node deletes its outgoing edges only
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for (unsigned i=0, N=outEdges.size(); i < N; i++)
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delete outEdges[i];
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}
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void SchedGraphNode::dump(int indent=0) const {
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@ -154,6 +158,7 @@ inline void
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SchedGraphNode::removeInEdge(const SchedGraphEdge* edge)
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{
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assert(edge->getSink() == this);
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for (iterator I = beginInEdges(); I != endInEdges(); ++I)
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if ((*I) == edge)
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{
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@ -166,6 +171,7 @@ inline void
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SchedGraphNode::removeOutEdge(const SchedGraphEdge* edge)
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{
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assert(edge->getSrc() == this);
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for (iterator I = beginOutEdges(); I != endOutEdges(); ++I)
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if ((*I) == edge)
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{
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@ -174,26 +180,6 @@ SchedGraphNode::removeOutEdge(const SchedGraphEdge* edge)
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}
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}
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void
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SchedGraphNode::eraseAllEdges()
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{
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// Disconnect and delete all in-edges and out-edges for the node.
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// Note that we delete the in-edges too since they have been
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// disconnected from the source node and will not be deleted there.
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for (iterator I = beginInEdges(); I != endInEdges(); ++I)
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{
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(*I)->getSrc()->removeOutEdge(*I);
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delete *I;
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}
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for (iterator I = beginOutEdges(); I != endOutEdges(); ++I)
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{
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(*I)->getSink()->removeInEdge(*I);
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delete *I;
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}
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inEdges.clear();
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outEdges.clear();
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}
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//
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// class SchedGraph
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@ -212,9 +198,18 @@ SchedGraph::SchedGraph(const BasicBlock* bb,
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/*dtor*/
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SchedGraph::~SchedGraph()
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{
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// delete all the nodes. each node deletes its out-edges.
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for (iterator I=begin(); I != end(); ++I)
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delete (*I).second;
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{
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SchedGraphNode* node = (*I).second;
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// for each node, delete its out-edges
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for (SchedGraphNode::iterator I = node->beginOutEdges();
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I != node->endOutEdges(); ++I)
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delete *I;
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// then delete the node itself.
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delete node;
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}
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}
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@ -242,6 +237,62 @@ SchedGraph::dump() const
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}
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void
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SchedGraph::eraseIncomingEdges(SchedGraphNode* node, bool addDummyEdges)
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{
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// Delete and disconnect all in-edges for the node
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for (SchedGraphNode::iterator I = node->beginInEdges();
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I != node->endInEdges(); ++I)
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{
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SchedGraphNode* srcNode = (*I)->getSrc();
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srcNode->removeOutEdge(*I);
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delete *I;
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if (addDummyEdges &&
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srcNode != getRoot() &&
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srcNode->beginOutEdges() == srcNode->endOutEdges())
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{ // srcNode has no more out edges, so add an edge to dummy EXIT node
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assert(node != getLeaf() && "Adding edge that was just removed?");
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(void) new SchedGraphEdge(srcNode, getLeaf(),
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SchedGraphEdge::CtrlDep, SchedGraphEdge::NonDataDep, 0);
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}
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}
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node->inEdges.clear();
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}
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void
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SchedGraph::eraseOutgoingEdges(SchedGraphNode* node, bool addDummyEdges)
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{
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// Delete and disconnect all out-edges for the node
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for (SchedGraphNode::iterator I = node->beginOutEdges();
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I != node->endOutEdges(); ++I)
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{
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SchedGraphNode* sinkNode = (*I)->getSink();
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sinkNode->removeInEdge(*I);
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delete *I;
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if (addDummyEdges &&
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sinkNode != getLeaf() &&
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sinkNode->beginInEdges() == sinkNode->endInEdges())
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{ //sinkNode has no more in edges, so add an edge from dummy ENTRY node
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assert(node != getRoot() && "Adding edge that was just removed?");
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(void) new SchedGraphEdge(getRoot(), sinkNode,
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SchedGraphEdge::CtrlDep, SchedGraphEdge::NonDataDep, 0);
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}
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}
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node->outEdges.clear();
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}
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void
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SchedGraph::eraseIncidentEdges(SchedGraphNode* node, bool addDummyEdges)
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{
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this->eraseIncomingEdges(node, addDummyEdges);
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this->eraseOutgoingEdges(node, addDummyEdges);
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}
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void
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SchedGraph::addDummyEdges()
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{
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@ -482,7 +533,7 @@ SchedGraph::addSSAEdge(SchedGraphNode* node,
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if (!val->isInstruction()) return;
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const Instruction* thisVMInstr = node->getInstr();
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const Instruction* defVMInstr = (const Instruction*) val;
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const Instruction* defVMInstr = val->castInstructionAsserting();
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// Phi instructions are the only ones that produce a value but don't get
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// any non-dummy machine instructions. Return here as an optimization.
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@ -510,7 +561,7 @@ SchedGraph::addSSAEdge(SchedGraphNode* node,
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// this instruction does define value `val'.
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// if there is a node for it in the same graph, add an edge.
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SchedGraphNode* defNode = this->getGraphNodeForInstr(defMvec[i]);
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if (defNode != NULL)
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if (defNode != NULL && defNode != node)
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(void) new SchedGraphEdge(defNode, node, val);
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}
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}
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@ -538,8 +589,8 @@ SchedGraph::addEdgesForInstruction(SchedGraphNode* node,
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// if this writes to a machine register other than the hardwired
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// "zero" register used on many processors, record the reference.
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if (mop.getOperandType() == MachineOperand::MO_MachineRegister
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&& (! (target.zeroRegNum >= 0
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&& mop.getMachineRegNum()==(unsigned) target.zeroRegNum)))
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&& (mop.getMachineRegNum()
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== (unsigned) target.getRegInfo().getZeroRegNum()))
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{
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regToRefVecMap[mop.getMachineRegNum()].
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push_back(make_pair(node, i));
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@ -1,15 +1,16 @@
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/****************************************************************************
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* File:
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* SchedGraph.cpp
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*
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* Purpose:
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* Scheduling graph based on SSA graph plus extra dependence edges
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* capturing dependences due to machine resources (machine registers,
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* CC registers, and any others).
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*
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* History:
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* 7/20/01 - Vikram Adve - Created
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***************************************************************************/
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// $Id$
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//***************************************************************************
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// File:
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// SchedGraph.cpp
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//
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// Purpose:
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// Scheduling graph based on SSA graph plus extra dependence edges
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// capturing dependences due to machine resources (machine registers,
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// CC registers, and any others).
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//
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// History:
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// 7/20/01 - Vikram Adve - Created
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//**************************************************************************/
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#include "SchedGraph.h"
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#include "llvm/InstrTypes.h"
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@ -17,7 +18,8 @@
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#include "llvm/BasicBlock.h"
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#include "llvm/Method.h"
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#include "llvm/CodeGen/MachineInstr.h"
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#include "llvm/Target/InstInfo.h"
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#include "llvm/Target/MachineInstrInfo.h"
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#include "llvm/Target/MachineRegInfo.h"
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#include "llvm/Support/StringExtras.h"
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#include <algorithm>
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@ -95,6 +97,11 @@ SchedGraphEdge::SchedGraphEdge(SchedGraphNode* _src,
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sink->addInEdge(this);
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}
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/*dtor*/
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SchedGraphEdge::~SchedGraphEdge()
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{
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}
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void SchedGraphEdge::dump(int indent=0) const {
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printIndent(indent); cout << *this;
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}
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@ -127,9 +134,6 @@ SchedGraphNode::SchedGraphNode(unsigned int _nodeId,
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/*dtor*/
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SchedGraphNode::~SchedGraphNode()
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{
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// a node deletes its outgoing edges only
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for (unsigned i=0, N=outEdges.size(); i < N; i++)
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delete outEdges[i];
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}
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void SchedGraphNode::dump(int indent=0) const {
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@ -154,6 +158,7 @@ inline void
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SchedGraphNode::removeInEdge(const SchedGraphEdge* edge)
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{
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assert(edge->getSink() == this);
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for (iterator I = beginInEdges(); I != endInEdges(); ++I)
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if ((*I) == edge)
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{
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@ -166,6 +171,7 @@ inline void
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SchedGraphNode::removeOutEdge(const SchedGraphEdge* edge)
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{
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assert(edge->getSrc() == this);
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for (iterator I = beginOutEdges(); I != endOutEdges(); ++I)
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if ((*I) == edge)
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{
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@ -174,26 +180,6 @@ SchedGraphNode::removeOutEdge(const SchedGraphEdge* edge)
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}
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}
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void
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SchedGraphNode::eraseAllEdges()
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{
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// Disconnect and delete all in-edges and out-edges for the node.
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// Note that we delete the in-edges too since they have been
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// disconnected from the source node and will not be deleted there.
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for (iterator I = beginInEdges(); I != endInEdges(); ++I)
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{
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(*I)->getSrc()->removeOutEdge(*I);
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delete *I;
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}
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for (iterator I = beginOutEdges(); I != endOutEdges(); ++I)
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{
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(*I)->getSink()->removeInEdge(*I);
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delete *I;
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}
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inEdges.clear();
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outEdges.clear();
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}
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//
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// class SchedGraph
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@ -212,9 +198,18 @@ SchedGraph::SchedGraph(const BasicBlock* bb,
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/*dtor*/
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SchedGraph::~SchedGraph()
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{
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// delete all the nodes. each node deletes its out-edges.
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for (iterator I=begin(); I != end(); ++I)
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delete (*I).second;
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{
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SchedGraphNode* node = (*I).second;
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// for each node, delete its out-edges
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for (SchedGraphNode::iterator I = node->beginOutEdges();
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I != node->endOutEdges(); ++I)
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delete *I;
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// then delete the node itself.
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delete node;
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}
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}
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@ -242,6 +237,62 @@ SchedGraph::dump() const
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}
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void
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SchedGraph::eraseIncomingEdges(SchedGraphNode* node, bool addDummyEdges)
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{
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// Delete and disconnect all in-edges for the node
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for (SchedGraphNode::iterator I = node->beginInEdges();
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I != node->endInEdges(); ++I)
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{
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SchedGraphNode* srcNode = (*I)->getSrc();
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srcNode->removeOutEdge(*I);
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delete *I;
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if (addDummyEdges &&
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srcNode != getRoot() &&
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srcNode->beginOutEdges() == srcNode->endOutEdges())
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{ // srcNode has no more out edges, so add an edge to dummy EXIT node
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assert(node != getLeaf() && "Adding edge that was just removed?");
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(void) new SchedGraphEdge(srcNode, getLeaf(),
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SchedGraphEdge::CtrlDep, SchedGraphEdge::NonDataDep, 0);
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}
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}
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node->inEdges.clear();
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}
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void
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SchedGraph::eraseOutgoingEdges(SchedGraphNode* node, bool addDummyEdges)
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{
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// Delete and disconnect all out-edges for the node
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for (SchedGraphNode::iterator I = node->beginOutEdges();
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I != node->endOutEdges(); ++I)
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{
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SchedGraphNode* sinkNode = (*I)->getSink();
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sinkNode->removeInEdge(*I);
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delete *I;
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if (addDummyEdges &&
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sinkNode != getLeaf() &&
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sinkNode->beginInEdges() == sinkNode->endInEdges())
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{ //sinkNode has no more in edges, so add an edge from dummy ENTRY node
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assert(node != getRoot() && "Adding edge that was just removed?");
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(void) new SchedGraphEdge(getRoot(), sinkNode,
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SchedGraphEdge::CtrlDep, SchedGraphEdge::NonDataDep, 0);
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}
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}
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node->outEdges.clear();
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}
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void
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SchedGraph::eraseIncidentEdges(SchedGraphNode* node, bool addDummyEdges)
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{
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this->eraseIncomingEdges(node, addDummyEdges);
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this->eraseOutgoingEdges(node, addDummyEdges);
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}
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void
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SchedGraph::addDummyEdges()
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{
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@ -482,7 +533,7 @@ SchedGraph::addSSAEdge(SchedGraphNode* node,
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if (!val->isInstruction()) return;
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const Instruction* thisVMInstr = node->getInstr();
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const Instruction* defVMInstr = (const Instruction*) val;
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const Instruction* defVMInstr = val->castInstructionAsserting();
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// Phi instructions are the only ones that produce a value but don't get
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// any non-dummy machine instructions. Return here as an optimization.
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@ -510,7 +561,7 @@ SchedGraph::addSSAEdge(SchedGraphNode* node,
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// this instruction does define value `val'.
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// if there is a node for it in the same graph, add an edge.
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SchedGraphNode* defNode = this->getGraphNodeForInstr(defMvec[i]);
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if (defNode != NULL)
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if (defNode != NULL && defNode != node)
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(void) new SchedGraphEdge(defNode, node, val);
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}
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}
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@ -538,8 +589,8 @@ SchedGraph::addEdgesForInstruction(SchedGraphNode* node,
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// if this writes to a machine register other than the hardwired
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// "zero" register used on many processors, record the reference.
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if (mop.getOperandType() == MachineOperand::MO_MachineRegister
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&& (! (target.zeroRegNum >= 0
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&& mop.getMachineRegNum()==(unsigned) target.zeroRegNum)))
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&& (mop.getMachineRegNum()
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== (unsigned) target.getRegInfo().getZeroRegNum()))
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{
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regToRefVecMap[mop.getMachineRegNum()].
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push_back(make_pair(node, i));
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