Use the 'regalloc' debug tag for most register allocator tracing.

llvm-svn: 147725
diff --git a/llvm/lib/CodeGen/LiveIntervalAnalysis.cpp b/llvm/lib/CodeGen/LiveIntervalAnalysis.cpp
index 9ee7c0b..549e1a2 100644
--- a/llvm/lib/CodeGen/LiveIntervalAnalysis.cpp
+++ b/llvm/lib/CodeGen/LiveIntervalAnalysis.cpp
@@ -15,7 +15,7 @@
 //
 //===----------------------------------------------------------------------===//
 
-#define DEBUG_TYPE "liveintervals"
+#define DEBUG_TYPE "regalloc"
 #include "llvm/CodeGen/LiveIntervalAnalysis.h"
 #include "VirtRegMap.h"
 #include "llvm/Value.h"