[llvm-mca] Improve debugging (NFC)

llvm-svn: 350661
diff --git a/llvm/lib/MCA/InstrBuilder.cpp b/llvm/lib/MCA/InstrBuilder.cpp
index d8309b6..76881b0 100644
--- a/llvm/lib/MCA/InstrBuilder.cpp
+++ b/llvm/lib/MCA/InstrBuilder.cpp
@@ -558,6 +558,9 @@
   populateWrites(*ID, MCI, SchedClassID);
   populateReads(*ID, MCI, SchedClassID);
 
+#ifndef NDEBUG
+  ID->Name = MCII.getName(Opcode);
+#endif
   LLVM_DEBUG(dbgs() << "\t\tMaxLatency=" << ID->MaxLatency << '\n');
   LLVM_DEBUG(dbgs() << "\t\tNumMicroOps=" << ID->NumMicroOps << '\n');