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Add weights to graph edges. Choose between edges based on their weight.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50757 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Mikhail Glushenkov 2008-05-06 18:14:24 +00:00
parent d83038c960
commit bb8b58dcf3
3 changed files with 32 additions and 37 deletions
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40
tools/llvmc2/CompilationGraph.cpp
View File

@ -33,35 +33,37 @@ extern cl::list<std::string> Languages;
namespace {
// Go through the list C and find the edge that isEnabled(); if
// there is no such edge, return the default edge; if there is no
// default edge, throw an exception.
// Return the edge with the maximum weight.
template <class C>
const Edge* ChooseEdge(const C& EdgesContainer,
const std::string& NodeName = "root") {
const Edge* DefaultEdge = 0;
const Edge* MaxEdge = 0;
unsigned MaxWeight = 0;
bool SingleMax = true;
for (typename C::const_iterator B = EdgesContainer.begin(),
E = EdgesContainer.end(); B != E; ++B) {
const Edge* E = B->getPtr();
if (E->isDefault())
if (!DefaultEdge)
DefaultEdge = E;
else
throw std::runtime_error("Node " + NodeName
+ ": multiple default outward edges found!"
" Most probably a specification error.");
if (E->isEnabled())
return E;
unsigned EW = E->Weight();
if (EW > MaxWeight) {
MaxEdge = E;
MaxWeight = EW;
SingleMax = true;
}
else if (EW == MaxWeight) {
SingleMax = false;
}
}
if (DefaultEdge)
return DefaultEdge;
else
throw std::runtime_error("Node " + NodeName
+ ": no default outward edge found!"
if (!SingleMax)
throw std::runtime_error("Node " + NodeName +
": multiple maximal outward edges found!"
" Most probably a specification error.");
if (!MaxEdge)
throw std::runtime_error("Node " + NodeName +
": no maximal outward edge found!"
" Most probably a specification error.");
return MaxEdge;
}
}

6
tools/llvmc2/CompilationGraph.h
View File

@ -35,8 +35,7 @@ namespace llvmc {
virtual ~Edge() {};
const std::string& ToolName() const { return ToolName_; }
virtual bool isEnabled() const = 0;
virtual bool isDefault() const = 0;
virtual unsigned Weight() const = 0;
private:
std::string ToolName_;
};
@ -45,8 +44,7 @@ namespace llvmc {
class SimpleEdge : public Edge {
public:
SimpleEdge(const std::string& T) : Edge(T) {}
bool isEnabled() const { return false;}
bool isDefault() const { return true;}
unsigned Weight() const { return 1; }
};
// A node of the compilation graph.

23
utils/TableGen/LLVMCConfigurationEmitter.cpp
View File

@ -974,9 +974,9 @@ void EmitEdgeClass(unsigned N, const std::string& Target,
<< Indent1 << "Edge" << N << "() : Edge(\"" << Target
<< "\") {}\n\n"
// Function isEnabled().
<< Indent1 << "bool isEnabled() const {\n"
<< Indent2 << "bool ret = false;\n";
// Function Weight().
<< Indent1 << "unsigned Weight() const {\n"
<< Indent2 << "unsigned ret = 0;\n";
for (size_t i = 0, PropsSize = Props->size(); i < PropsSize; ++i) {
const DagInit& Prop = dynamic_cast<DagInit&>(*Props->getElement(i));
@ -985,7 +985,7 @@ void EmitEdgeClass(unsigned N, const std::string& Target,
if (PropName == "default")
IsDefault = true;
O << Indent2 << "if (ret || (";
O << Indent2 << "if ((";
if (PropName == "and") {
O << '(';
for (unsigned j = 0, NumArgs = Prop.getNumArgs(); j < NumArgs; ++j) {
@ -1002,19 +1002,14 @@ void EmitEdgeClass(unsigned N, const std::string& Target,
else {
EmitEdgePropertyTest(PropName, Prop, OptDescs, O);
}
O << "))\n" << Indent3 << "ret = true;\n";
O << "))\n" << Indent3 << "ret += 2;\n";
}
O << Indent2 << "return ret;\n"
<< Indent1 << "};\n\n"
// Function isDefault().
<< Indent1 << "bool isDefault() const { return ";
if (IsDefault)
O << "true";
else
O << "false";
O <<"; }\n};\n\n";
O << Indent2 << "ret += 1;\n";
O << Indent2 << "return ret;\n"
<< Indent1 << "};\n\n};\n\n";
}
// Emit Edge* classes that represent graph edges.