// Print out the region tree of a function using dotty/graphviz.
//===----------------------------------------------------------------------===//
+#include "llvm/Analysis/Passes.h"
+#include "llvm/ADT/DepthFirstIterator.h"
+#include "llvm/ADT/PostOrderIterator.h"
+#include "llvm/ADT/Statistic.h"
+#include "llvm/Analysis/DOTGraphTraitsPass.h"
#include "llvm/Analysis/RegionInfo.h"
#include "llvm/Analysis/RegionIterator.h"
#include "llvm/Analysis/RegionPrinter.h"
-#include "llvm/Analysis/Passes.h"
-#include "llvm/Analysis/DOTGraphTraitsPass.h"
-#include "llvm/ADT/Statistic.h"
-#include "llvm/ADT/PostOrderIterator.h"
-#include "llvm/ADT/DepthFirstIterator.h"
-#include "llvm/Support/Debug.h"
#include "llvm/Support/CommandLine.h"
+#include "llvm/Support/Debug.h"
#include "llvm/Support/raw_ostream.h"
using namespace llvm;
G->getTopLevelRegion());
}
+ std::string getEdgeAttributes(RegionNode *srcNode,
+ GraphTraits<RegionInfo*>::ChildIteratorType CI, RegionInfo *RI) {
+
+ 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>();
+
+ 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 "";
+ }
+
// 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 Region *R, GraphWriter<RegionInfo*> &GW,
RegionInfo *RI = R->getRegionInfo();
for (Region::const_block_iterator BI = R->block_begin(),
- BE = R->block_end(); BI != BE; ++BI) {
- BasicBlock *BB = (*BI)->getNodeAs<BasicBlock>();
- if (RI->getRegionFor(BB) == R)
+ 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(BB))
+ << static_cast<const void*>(RI->getTopLevelRegion()->getBBNode(*BI))
<< ";\n";
- }
O.indent(2 * depth) << "}\n";
}