#include "llvm/CodeGen/MachineBasicBlock.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/Passes.h"
+#include "llvm/Support/CommandLine.h"
#include "llvm/Support/GraphWriter.h"
using namespace llvm;
+static cl::opt<bool>
+ViewEdgeBundles("view-edge-bundles", cl::Hidden,
+ cl::desc("Pop up a window to show edge bundle graphs"));
+
char EdgeBundles::ID = 0;
INITIALIZE_PASS(EdgeBundles, "edge-bundles", "Bundle Machine CFG Edges",
bool EdgeBundles::runOnMachineFunction(MachineFunction &mf) {
MF = &mf;
EC.clear();
- EC.grow(2 * MF->size());
+ EC.grow(2 * MF->getNumBlockIDs());
- for (MachineFunction::const_iterator I = MF->begin(), E = MF->end(); I != E;
- ++I) {
- const MachineBasicBlock &MBB = *I;
+ for (const auto &MBB : *MF) {
unsigned OutE = 2 * MBB.getNumber() + 1;
// Join the outgoing bundle with the ingoing bundles of all successors.
for (MachineBasicBlock::const_succ_iterator SI = MBB.succ_begin(),
EC.join(OutE, 2 * (*SI)->getNumber());
}
EC.compress();
- return false;
-}
+ if (ViewEdgeBundles)
+ view();
-/// view - Visualize the annotated bipartite CFG with Graphviz.
-void EdgeBundles::view() const {
- ViewGraph(*this, "EdgeBundles");
+ // Compute the reverse mapping.
+ Blocks.clear();
+ Blocks.resize(getNumBundles());
+
+ for (unsigned i = 0, e = MF->getNumBlockIDs(); i != e; ++i) {
+ unsigned b0 = getBundle(i, 0);
+ unsigned b1 = getBundle(i, 1);
+ Blocks[b0].push_back(i);
+ if (b1 != b0)
+ Blocks[b1].push_back(i);
+ }
+
+ return false;
}
/// Specialize WriteGraph, the standard implementation won't work.
-raw_ostream &llvm::WriteGraph(raw_ostream &O, const EdgeBundles &G,
- bool ShortNames,
- const std::string &Title) {
+namespace llvm {
+template<>
+raw_ostream &WriteGraph<>(raw_ostream &O, const EdgeBundles &G,
+ bool ShortNames,
+ const Twine &Title) {
const MachineFunction *MF = G.getMachineFunction();
O << "digraph {\n";
- for (MachineFunction::const_iterator I = MF->begin(), E = MF->end();
- I != E; ++I) {
- unsigned BB = I->getNumber();
+ for (const auto &MBB : *MF) {
+ unsigned BB = MBB.getNumber();
O << "\t\"BB#" << BB << "\" [ shape=box ]\n"
<< '\t' << G.getBundle(BB, false) << " -> \"BB#" << BB << "\"\n"
<< "\t\"BB#" << BB << "\" -> " << G.getBundle(BB, true) << '\n';
- for (MachineBasicBlock::const_succ_iterator SI = I->succ_begin(),
- SE = I->succ_end(); SI != SE; ++SI)
+ for (MachineBasicBlock::const_succ_iterator SI = MBB.succ_begin(),
+ SE = MBB.succ_end(); SI != SE; ++SI)
O << "\t\"BB#" << BB << "\" -> \"BB#" << (*SI)->getNumber()
<< "\" [ color=lightgray ]\n";
}
O << "}\n";
return O;
}
+}
-
+/// view - Visualize the annotated bipartite CFG with Graphviz.
+void EdgeBundles::view() const {
+ ViewGraph(*this, "EdgeBundles");
+}