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//===- GraphPrinter.cpp - Create a DOT output describing the Scop. --------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// Create a DOT output describing the Scop.
//
// For each function a dot file is created that shows the control flow graph of
// the function and highlights the detected Scops.
//
//===----------------------------------------------------------------------===//
#include "polly/LinkAllPasses.h"
#include "polly/ScopDetection.h"
#include "llvm/Analysis/DOTGraphTraitsPass.h"
#include "llvm/Analysis/RegionInfo.h"
#include "llvm/Analysis/RegionIterator.h"
using namespace polly;
using namespace llvm;
namespace llvm {
template <>
struct GraphTraits<ScopDetection *> : public GraphTraits<RegionInfo *> {
static NodeType *getEntryNode(ScopDetection *SD) {
return GraphTraits<RegionInfo *>::getEntryNode(SD->getRI());
}
static nodes_iterator nodes_begin(ScopDetection *SD) {
return nodes_iterator::begin(getEntryNode(SD));
}
static nodes_iterator nodes_end(ScopDetection *SD) {
return nodes_iterator::end(getEntryNode(SD));
}
};
template <> struct DOTGraphTraits<RegionNode *> : public DefaultDOTGraphTraits {
DOTGraphTraits(bool isSimple = false) : DefaultDOTGraphTraits(isSimple) {}
std::string getNodeLabel(RegionNode *Node, RegionNode *Graph) {
if (!Node->isSubRegion()) {
BasicBlock *BB = Node->getNodeAs<BasicBlock>();
if (isSimple())
return DOTGraphTraits<const Function *>::getSimpleNodeLabel(
BB, BB->getParent());
else
return DOTGraphTraits<const Function *>::getCompleteNodeLabel(
BB, BB->getParent());
}
return "Not implemented";
}
};
template <>
struct DOTGraphTraits<ScopDetection *> : public DOTGraphTraits<RegionNode *> {
DOTGraphTraits(bool isSimple = false)
: DOTGraphTraits<RegionNode *>(isSimple) {}
static std::string getGraphName(ScopDetection *SD) { return "Scop Graph"; }
std::string getEdgeAttributes(RegionNode *srcNode,
GraphTraits<RegionInfo *>::ChildIteratorType CI,
ScopDetection *SD) {
RegionNode *destNode = *CI;
if (srcNode->isSubRegion() || destNode->isSubRegion())
return "";
// In case of a backedge, do not use it to define the layout of the nodes.
BasicBlock *srcBB = srcNode->getNodeAs<BasicBlock>();
BasicBlock *destBB = destNode->getNodeAs<BasicBlock>();
RegionInfo *RI = SD->getRI();
Region *R = RI->getRegionFor(destBB);
while (R && R->getParent())
if (R->getParent()->getEntry() == destBB)
R = R->getParent();
else
break;
if (R->getEntry() == destBB && R->contains(srcBB))
return "constraint=false";
return "";
}
std::string getNodeLabel(RegionNode *Node, ScopDetection *SD) {
return DOTGraphTraits<RegionNode *>::getNodeLabel(
Node, SD->getRI()->getTopLevelRegion());
}
static std::string escapeString(std::string String) {
std::string Escaped;
for (std::string::iterator SI = String.begin(), SE = String.end(); SI != SE;
++SI) {
if (*SI == '"')
Escaped += '\\';
Escaped += *SI;
}
return Escaped;
}
// Print the cluster of the subregions. This groups the single basic blocks
// and adds a different background color for each group.
static void printRegionCluster(const ScopDetection *SD, const Region *R,
raw_ostream &O, unsigned depth = 0) {
O.indent(2 * depth) << "subgraph cluster_" << static_cast<const void *>(R)
<< " {\n";
std::string ErrorMessage = SD->regionIsInvalidBecause(R);
ErrorMessage = escapeString(ErrorMessage);
O.indent(2 * (depth + 1)) << "label = \"" << ErrorMessage << "\";\n";
if (SD->isMaxRegionInScop(*R)) {
O.indent(2 * (depth + 1)) << "style = filled;\n";
// Set color to green.
O.indent(2 * (depth + 1)) << "color = 3";
} else {
O.indent(2 * (depth + 1)) << "style = solid;\n";
int color = (R->getDepth() * 2 % 12) + 1;
// We do not want green again.
if (color == 3)
color = 6;
O.indent(2 * (depth + 1)) << "color = " << color << "\n";
}
for (Region::const_iterator RI = R->begin(), RE = R->end(); RI != RE; ++RI)
printRegionCluster(SD, *RI, O, depth + 1);
RegionInfo *RI = R->getRegionInfo();
for (Region::const_block_iterator BI = R->block_begin(),
BE = R->block_end();
BI != BE; ++BI)
if (RI->getRegionFor(*BI) == R)
O.indent(2 * (depth + 1))
<< "Node" << static_cast<const void *>(
RI->getTopLevelRegion()->getBBNode(*BI)) << ";\n";
O.indent(2 * depth) << "}\n";
}
static void addCustomGraphFeatures(const ScopDetection *SD,
GraphWriter<ScopDetection *> &GW) {
raw_ostream &O = GW.getOStream();
O << "\tcolorscheme = \"paired12\"\n";
printRegionCluster(SD, SD->getRI()->getTopLevelRegion(), O, 4);
}
};
} // end namespace llvm
struct ScopViewer : public DOTGraphTraitsViewer<ScopDetection, false> {
static char ID;
ScopViewer() : DOTGraphTraitsViewer<ScopDetection, false>("scops", ID) {}
};
char ScopViewer::ID = 0;
struct ScopOnlyViewer : public DOTGraphTraitsViewer<ScopDetection, true> {
static char ID;
ScopOnlyViewer()
: DOTGraphTraitsViewer<ScopDetection, true>("scopsonly", ID) {}
};
char ScopOnlyViewer::ID = 0;
struct ScopPrinter : public DOTGraphTraitsPrinter<ScopDetection, false> {
static char ID;
ScopPrinter() : DOTGraphTraitsPrinter<ScopDetection, false>("scops", ID) {}
};
char ScopPrinter::ID = 0;
struct ScopOnlyPrinter : public DOTGraphTraitsPrinter<ScopDetection, true> {
static char ID;
ScopOnlyPrinter()
: DOTGraphTraitsPrinter<ScopDetection, true>("scopsonly", ID) {}
};
char ScopOnlyPrinter::ID = 0;
static RegisterPass<ScopViewer> X("view-scops",
"Polly - View Scops of function");
static RegisterPass<ScopOnlyViewer>
Y("view-scops-only",
"Polly - View Scops of function (with no function bodies)");
static RegisterPass<ScopPrinter> M("dot-scops",
"Polly - Print Scops of function");
static RegisterPass<ScopOnlyPrinter>
N("dot-scops-only",
"Polly - Print Scops of function (with no function bodies)");
Pass *polly::createDOTViewerPass() { return new ScopViewer(); }
Pass *polly::createDOTOnlyViewerPass() { return new ScopOnlyViewer(); }
Pass *polly::createDOTPrinterPass() { return new ScopPrinter(); }
Pass *polly::createDOTOnlyPrinterPass() { return new ScopOnlyPrinter(); }
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