#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) {
EC.join(OutE, 2 * (*SI)->getNumber());
}
EC.compress();
+ if (ViewEdgeBundles)
+ view();
+
+ // 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;
}
O << "}\n";
return O;
}
-
-