}
//! Dump the dependent variable set:
+#ifndef NDEBUG
void DumpDepVars(MultipleUseVarSet &DepVars) {
if (DepVars.empty()) {
DEBUG(errs() << "<empty set>");
} else {
DEBUG(errs() << "[ ");
- for (MultipleUseVarSet::const_iterator i = DepVars.begin(), e = DepVars.end();
- i != e; ++i) {
+ for (MultipleUseVarSet::const_iterator i = DepVars.begin(),
+ e = DepVars.end(); i != e; ++i) {
DEBUG(errs() << (*i) << " ");
}
DEBUG(errs() << "]");
}
}
+#endif
+
}
//===----------------------------------------------------------------------===//
// PatternToMatch implementation
//
+
+/// getPatternSize - Return the 'size' of this pattern. We want to match large
+/// patterns before small ones. This is used to determine the size of a
+/// pattern.
+static unsigned getPatternSize(const TreePatternNode *P,
+ const CodeGenDAGPatterns &CGP) {
+ unsigned Size = 3; // The node itself.
+ // If the root node is a ConstantSDNode, increases its size.
+ // e.g. (set R32:$dst, 0).
+ if (P->isLeaf() && dynamic_cast<IntInit*>(P->getLeafValue()))
+ Size += 2;
+
+ // FIXME: This is a hack to statically increase the priority of patterns
+ // which maps a sub-dag to a complex pattern. e.g. favors LEA over ADD.
+ // Later we can allow complexity / cost for each pattern to be (optionally)
+ // specified. To get best possible pattern match we'll need to dynamically
+ // calculate the complexity of all patterns a dag can potentially map to.
+ const ComplexPattern *AM = P->getComplexPatternInfo(CGP);
+ if (AM)
+ Size += AM->getNumOperands() * 3;
+
+ // If this node has some predicate function that must match, it adds to the
+ // complexity of this node.
+ if (!P->getPredicateFns().empty())
+ ++Size;
+
+ // Count children in the count if they are also nodes.
+ for (unsigned i = 0, e = P->getNumChildren(); i != e; ++i) {
+ TreePatternNode *Child = P->getChild(i);
+ if (!Child->isLeaf() && Child->getNumTypes() &&
+ Child->getType(0) != MVT::Other)
+ Size += getPatternSize(Child, CGP);
+ else if (Child->isLeaf()) {
+ if (dynamic_cast<IntInit*>(Child->getLeafValue()))
+ Size += 5; // Matches a ConstantSDNode (+3) and a specific value (+2).
+ else if (Child->getComplexPatternInfo(CGP))
+ Size += getPatternSize(Child, CGP);
+ else if (!Child->getPredicateFns().empty())
+ ++Size;
+ }
+ }
+
+ return Size;
+}
+
+/// Compute the complexity metric for the input pattern. This roughly
+/// corresponds to the number of nodes that are covered.
+unsigned PatternToMatch::
+getPatternComplexity(const CodeGenDAGPatterns &CGP) const {
+ return getPatternSize(getSrcPattern(), CGP) + getAddedComplexity();
+}
+
+
/// getPredicateCheck - Return a single string containing all of this
/// pattern's predicates concatenated with "&&" operators.
///
bool SDTypeConstraint::ApplyTypeConstraint(TreePatternNode *N,
const SDNodeInfo &NodeInfo,
TreePattern &TP) const {
- // Check that the number of operands is sane. Negative operands -> varargs.
- if (NodeInfo.getNumOperands() >= 0) {
- if (N->getNumChildren() != (unsigned)NodeInfo.getNumOperands())
- TP.error(N->getOperator()->getName() + " node requires exactly " +
- itostr(NodeInfo.getNumOperands()) + " operands!");
- }
-
unsigned ResNo = 0; // The result number being referenced.
TreePatternNode *NodeToApply = getOperandNum(OperandNo, N, NodeInfo, ResNo);
CodeGenInstruction &InstInfo = CDP.getTargetInfo().getInstruction(Operator);
// FIXME: Should allow access to all the results here.
- unsigned NumDefsToAdd = InstInfo.NumDefs ? 1 : 0;
+ unsigned NumDefsToAdd = InstInfo.Operands.NumDefs ? 1 : 0;
// Add on one implicit def if it has a resolvable type.
if (InstInfo.HasOneImplicitDefWithKnownVT(CDP.getTargetInfo()) !=MVT::Other)
const CodeGenTarget &T = TP.getDAGPatterns().getTargetInfo();
return EEVT::TypeSet(T.getRegisterVTs(R));
}
+
+ if (R->isSubClassOf("SubRegIndex")) {
+ assert(ResNo == 0 && "SubRegisterIndices only produce one result!");
+ return EEVT::TypeSet();
+ }
if (R->isSubClassOf("ValueType") || R->isSubClassOf("CondCode")) {
assert(ResNo == 0 && "This node only has one result!");
if (getOperator()->isSubClassOf("SDNode")) {
const SDNodeInfo &NI = CDP.getSDNodeInfo(getOperator());
+ // Check that the number of operands is sane. Negative operands -> varargs.
+ if (NI.getNumOperands() >= 0 &&
+ getNumChildren() != (unsigned)NI.getNumOperands())
+ TP.error(getOperator()->getName() + " node requires exactly " +
+ itostr(NI.getNumOperands()) + " operands!");
+
bool MadeChange = NI.ApplyTypeConstraints(this, TP);
for (unsigned i = 0, e = getNumChildren(); i != e; ++i)
MadeChange |= getChild(i)->ApplyTypeConstraints(TP, NotRegisters);
// Apply the result types to the node, these come from the things in the
// (outs) list of the instruction.
// FIXME: Cap at one result so far.
- unsigned NumResultsToAdd = InstInfo.NumDefs ? 1 : 0;
+ unsigned NumResultsToAdd = InstInfo.Operands.NumDefs ? 1 : 0;
for (unsigned ResNo = 0; ResNo != NumResultsToAdd; ++ResNo) {
Record *ResultNode = Inst.getResult(ResNo);
// Input argument?
TreePatternNode *Res = new TreePatternNode(DI, 1);
- if (R->getName() == "node") {
+ if (R->getName() == "node" && !OpName.empty()) {
if (OpName.empty())
error("'node' argument requires a name to match with operand list");
Args.push_back(OpName);
Init *II = BI->convertInitializerTo(new IntRecTy());
if (II == 0 || !dynamic_cast<IntInit*>(II))
error("Bits value must be constants!");
-
- if (!OpName.empty())
- error("Constant int argument should not have a name!");
-
- return new TreePatternNode(dynamic_cast<IntInit*>(II), 1);
+ return ParseTreePattern(II, OpName);
}
DagInit *Dag = dynamic_cast<DagInit*>(TheInit);
error("Unrecognized node '" + Operator->getName() + "'!");
// Check to see if this is something that is illegal in an input pattern.
- if (isInputPattern && (Operator->isSubClassOf("Instruction") ||
- Operator->isSubClassOf("SDNodeXForm")))
- error("Cannot use '" + Operator->getName() + "' in an input pattern!");
+ if (isInputPattern) {
+ if (Operator->isSubClassOf("Instruction") ||
+ Operator->isSubClassOf("SDNodeXForm"))
+ error("Cannot use '" + Operator->getName() + "' in an input pattern!");
+ } else {
+ if (Operator->isSubClassOf("Intrinsic"))
+ error("Cannot use '" + Operator->getName() + "' in an output pattern!");
+
+ if (Operator->isSubClassOf("SDNode") &&
+ Operator->getName() != "imm" &&
+ Operator->getName() != "fpimm" &&
+ Operator->getName() != "tglobaltlsaddr" &&
+ Operator->getName() != "tconstpool" &&
+ Operator->getName() != "tjumptable" &&
+ Operator->getName() != "tframeindex" &&
+ Operator->getName() != "texternalsym" &&
+ Operator->getName() != "tblockaddress" &&
+ Operator->getName() != "tglobaladdr" &&
+ Operator->getName() != "bb" &&
+ Operator->getName() != "vt")
+ error("Cannot use '" + Operator->getName() + "' in an output pattern!");
+ }
std::vector<TreePatternNode*> Children;
return Result;
}
+/// SimplifyTree - See if we can simplify this tree to eliminate something that
+/// will never match in favor of something obvious that will. This is here
+/// strictly as a convenience to target authors because it allows them to write
+/// more type generic things and have useless type casts fold away.
+///
+/// This returns true if any change is made.
+static bool SimplifyTree(TreePatternNode *&N) {
+ if (N->isLeaf())
+ return false;
+
+ // If we have a bitconvert with a resolved type and if the source and
+ // destination types are the same, then the bitconvert is useless, remove it.
+ if (N->getOperator()->getName() == "bitconvert" &&
+ N->getExtType(0).isConcrete() &&
+ N->getExtType(0) == N->getChild(0)->getExtType(0) &&
+ N->getName().empty()) {
+ N = N->getChild(0);
+ SimplifyTree(N);
+ return true;
+ }
+
+ // Walk all children.
+ bool MadeChange = false;
+ for (unsigned i = 0, e = N->getNumChildren(); i != e; ++i) {
+ TreePatternNode *Child = N->getChild(i);
+ MadeChange |= SimplifyTree(Child);
+ N->setChild(i, Child);
+ }
+ return MadeChange;
+}
+
+
+
/// InferAllTypes - Infer/propagate as many types throughout the expression
/// patterns as possible. Return true if all types are inferred, false
/// otherwise. Throw an exception if a type contradiction is found.
bool MadeChange = true;
while (MadeChange) {
MadeChange = false;
- for (unsigned i = 0, e = Trees.size(); i != e; ++i)
+ for (unsigned i = 0, e = Trees.size(); i != e; ++i) {
MadeChange |= Trees[i]->ApplyTypeConstraints(*this, false);
+ MadeChange |= SimplifyTree(Trees[i]);
+ }
// If there are constraints on our named nodes, apply them.
for (StringMap<SmallVector<TreePatternNode*,1> >::iterator
/// HandleUse - Given "Pat" a leaf in the pattern, check to see if it is an
/// instruction input. Return true if this is a real use.
static bool HandleUse(TreePattern *I, TreePatternNode *Pat,
- std::map<std::string, TreePatternNode*> &InstInputs,
- std::vector<Record*> &InstImpInputs) {
+ std::map<std::string, TreePatternNode*> &InstInputs) {
// No name -> not interesting.
if (Pat->getName().empty()) {
if (Pat->isLeaf()) {
DefInit *DI = dynamic_cast<DefInit*>(Pat->getLeafValue());
if (DI && DI->getDef()->isSubClassOf("RegisterClass"))
I->error("Input " + DI->getDef()->getName() + " must be named!");
- else if (DI && DI->getDef()->isSubClassOf("Register"))
- InstImpInputs.push_back(DI->getDef());
}
return false;
}
FindPatternInputsAndOutputs(TreePattern *I, TreePatternNode *Pat,
std::map<std::string, TreePatternNode*> &InstInputs,
std::map<std::string, TreePatternNode*>&InstResults,
- std::vector<Record*> &InstImpInputs,
std::vector<Record*> &InstImpResults) {
if (Pat->isLeaf()) {
- bool isUse = HandleUse(I, Pat, InstInputs, InstImpInputs);
+ bool isUse = HandleUse(I, Pat, InstInputs);
if (!isUse && Pat->getTransformFn())
I->error("Cannot specify a transform function for a non-input value!");
return;
if (Pat->getChild(i)->getNumTypes() == 0)
I->error("Cannot have void nodes inside of patterns!");
FindPatternInputsAndOutputs(I, Pat->getChild(i), InstInputs, InstResults,
- InstImpInputs, InstImpResults);
+ InstImpResults);
}
// If this is a non-leaf node with no children, treat it basically as if
// it were a leaf. This handles nodes like (imm).
- bool isUse = HandleUse(I, Pat, InstInputs, InstImpInputs);
+ bool isUse = HandleUse(I, Pat, InstInputs);
if (!isUse && Pat->getTransformFn())
I->error("Cannot specify a transform function for a non-input value!");
// Verify and collect info from the computation.
FindPatternInputsAndOutputs(I, Pat->getChild(NumDests),
- InstInputs, InstResults,
- InstImpInputs, InstImpResults);
+ InstInputs, InstResults, InstImpResults);
}
//===----------------------------------------------------------------------===//
if (IntInfo->ModRef >= CodeGenIntrinsic::ReadArgMem)
mayLoad = true;// These may load memory.
- if (IntInfo->ModRef >= CodeGenIntrinsic::WriteArgMem)
+ if (IntInfo->ModRef >= CodeGenIntrinsic::ReadWriteArgMem)
mayStore = true;// Intrinsics that can write to memory are 'mayStore'.
- if (IntInfo->ModRef >= CodeGenIntrinsic::WriteMem)
+ if (IntInfo->ModRef >= CodeGenIntrinsic::ReadWriteMem)
// WriteMem intrinsics can have other strange effects.
HasSideEffects = true;
}
HasSideEffects = true;
}
- if (Inst.isVariadic)
+ if (Inst.Operands.isVariadic)
IsVariadic = true; // Can warn if we want.
}
CodeGenInstruction &InstInfo = Target.getInstruction(Instrs[i]);
- if (InstInfo.OperandList.size() != 0) {
- if (InstInfo.NumDefs == 0) {
+ if (InstInfo.Operands.size() != 0) {
+ if (InstInfo.Operands.NumDefs == 0) {
// These produce no results
- for (unsigned j = 0, e = InstInfo.OperandList.size(); j < e; ++j)
- Operands.push_back(InstInfo.OperandList[j].Rec);
+ for (unsigned j = 0, e = InstInfo.Operands.size(); j < e; ++j)
+ Operands.push_back(InstInfo.Operands[j].Rec);
} else {
// Assume the first operand is the result.
- Results.push_back(InstInfo.OperandList[0].Rec);
+ Results.push_back(InstInfo.Operands[0].Rec);
// The rest are inputs.
- for (unsigned j = 1, e = InstInfo.OperandList.size(); j < e; ++j)
- Operands.push_back(InstInfo.OperandList[j].Rec);
+ for (unsigned j = 1, e = InstInfo.Operands.size(); j < e; ++j)
+ Operands.push_back(InstInfo.Operands[j].Rec);
}
}
// Create and insert the instruction.
std::vector<Record*> ImpResults;
- std::vector<Record*> ImpOperands;
Instructions.insert(std::make_pair(Instrs[i],
- DAGInstruction(0, Results, Operands, ImpResults,
- ImpOperands)));
+ DAGInstruction(0, Results, Operands, ImpResults)));
continue; // no pattern.
}
// in the instruction, including what reg class they are.
std::map<std::string, TreePatternNode*> InstResults;
- std::vector<Record*> InstImpInputs;
std::vector<Record*> InstImpResults;
// Verify that the top-level forms in the instruction are of void type, and
// Find inputs and outputs, and verify the structure of the uses/defs.
FindPatternInputsAndOutputs(I, Pat, InstInputs, InstResults,
- InstImpInputs, InstImpResults);
+ InstImpResults);
}
// Now that we have inputs and outputs of the pattern, inspect the operands
std::vector<Record*> Results;
TreePatternNode *Res0Node = 0;
for (unsigned i = 0; i != NumResults; ++i) {
- if (i == CGI.OperandList.size())
+ if (i == CGI.Operands.size())
I->error("'" + InstResults.begin()->first +
"' set but does not appear in operand list!");
- const std::string &OpName = CGI.OperandList[i].Name;
+ const std::string &OpName = CGI.Operands[i].Name;
// Check that it exists in InstResults.
TreePatternNode *RNode = InstResults[OpName];
I->error("Operand $" + OpName + " should be a set destination: all "
"outputs must occur before inputs in operand list!");
- if (CGI.OperandList[i].Rec != R)
+ if (CGI.Operands[i].Rec != R)
I->error("Operand $" + OpName + " class mismatch!");
// Remember the return type.
- Results.push_back(CGI.OperandList[i].Rec);
+ Results.push_back(CGI.Operands[i].Rec);
// Okay, this one checks out.
InstResults.erase(OpName);
std::vector<TreePatternNode*> ResultNodeOperands;
std::vector<Record*> Operands;
- for (unsigned i = NumResults, e = CGI.OperandList.size(); i != e; ++i) {
- CodeGenInstruction::OperandInfo &Op = CGI.OperandList[i];
+ for (unsigned i = NumResults, e = CGI.Operands.size(); i != e; ++i) {
+ CGIOperandList::OperandInfo &Op = CGI.Operands[i];
const std::string &OpName = Op.Name;
if (OpName.empty())
I->error("Operand #" + utostr(i) + " in operands list has no name!");
ResultPattern->setType(i, Res0Node->getExtType(i));
// Create and insert the instruction.
- // FIXME: InstImpResults and InstImpInputs should not be part of
- // DAGInstruction.
- DAGInstruction TheInst(I, Results, Operands, InstImpResults, InstImpInputs);
+ // FIXME: InstImpResults should not be part of DAGInstruction.
+ DAGInstruction TheInst(I, Results, Operands, InstImpResults);
Instructions.insert(std::make_pair(I->getRecord(), TheInst));
// Use a temporary tree pattern to infer all types and make sure that the
InstInfo.mayStore = MayStore;
InstInfo.mayLoad = MayLoad;
InstInfo.hasSideEffects = HasSideEffects;
- InstInfo.isVariadic = IsVariadic;
+ InstInfo.Operands.isVariadic = IsVariadic;
}
}
// Validate that the input pattern is correct.
std::map<std::string, TreePatternNode*> InstInputs;
std::map<std::string, TreePatternNode*> InstResults;
- std::vector<Record*> InstImpInputs;
std::vector<Record*> InstImpResults;
for (unsigned j = 0, ee = Pattern->getNumTrees(); j != ee; ++j)
FindPatternInputsAndOutputs(Pattern, Pattern->getTree(j),
InstInputs, InstResults,
- InstImpInputs, InstImpResults);
+ InstImpResults);
// Promote the xform function to be an explicit node if set.
TreePatternNode *DstPattern = Result->getOnlyTree();
DEBUG(errs() << "Dependent/multiply used variables: ");
DEBUG(DumpDepVars(DepVars));
DEBUG(errs() << "\n");
- GenerateVariantsOf(PatternsToMatch[i].getSrcPattern(), Variants, *this, DepVars);
+ GenerateVariantsOf(PatternsToMatch[i].getSrcPattern(), Variants, *this,
+ DepVars);
assert(!Variants.empty() && "Must create at least original variant!");
Variants.erase(Variants.begin()); // Remove the original pattern.
PatternsToMatch[p].getPredicates())
continue;
// Check to see if this variant already exists.
- if (Variant->isIsomorphicTo(PatternsToMatch[p].getSrcPattern(), DepVars)) {
+ if (Variant->isIsomorphicTo(PatternsToMatch[p].getSrcPattern(),
+ DepVars)) {
DEBUG(errs() << " *** ALREADY EXISTS, ignoring variant.\n");
AlreadyExists = true;
break;
projects / oota-llvm.git / blobdiff