Signficantly speed up printing by not emitting the same file twice with
different names. Large SCC's tend to be big, so this saves a lot of time.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19970 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Analysis/DataStructure/Printer.cpp b/lib/Analysis/DataStructure/Printer.cpp
index eb7319d..4d5fa81 100644
--- a/lib/Analysis/DataStructure/Printer.cpp
+++ b/lib/Analysis/DataStructure/Printer.cpp
@@ -274,9 +274,15 @@
Gr.getAuxFunctionCalls().size() : Gr.getFunctionCalls().size();
TotalCallNodes += NumCalls;
- if (I->getName() == "main" || !OnlyPrintMain)
- Gr.writeGraphToFile(O, Prefix+I->getName());
- else {
+ if (I->getName() == "main" || !OnlyPrintMain) {
+ Function *SCCFn = Gr.getReturnNodes().begin()->first;
+ if (&*I == SCCFn)
+ Gr.writeGraphToFile(O, Prefix+I->getName());
+ else
+ O << "Didn't write '" << Prefix+I->getName()
+ << ".dot' - Graph already emitted to '" << Prefix+SCCFn->getName()
+ << "\n";
+ } else {
O << "Skipped Writing '" << Prefix+I->getName() << ".dot'... ["
<< Gr.getGraphSize() << "+" << NumCalls << "]\n";
}