Add debugging output for joining assignments

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15187 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/CodeGen/LiveIntervalAnalysis.cpp b/lib/CodeGen/LiveIntervalAnalysis.cpp
index c21a9c05401e0699bd511c5e5a6a3a372c179b17..d54eaefb66050b8ccfa9aea5a4b8467929120af6 100644 (file)
--- a/lib/CodeGen/LiveIntervalAnalysis.cpp
+++ b/lib/CodeGen/LiveIntervalAnalysis.cpp
@@ -616,6 +616,11 @@ void LiveIntervals::joinIntervals() {
     for (unsigned i = 0, e = MBBs.size(); i != e; ++i)
       joinIntervalsInMachineBB(MBBs[i].second);
   }
+
+  DEBUG(std::cerr << "*** Register mapping ***\n");
+  DEBUG(for (std::map<unsigned, unsigned>::iterator I = r2rMap_.begin(),
+             E = r2rMap_.end(); I != E; ++I)
+          std::cerr << "  reg " << I->first << " -> reg " << I->second << "\n";);
 }
 
 /// Return true if the two specified registers belong to different register