Include more information when printing phi nodes.

Still a bit cryptic, but people interested in phi nodes should know what they're doing... ;-)
Review URL: http://codereview.chromium.org/7824004

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@9110 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/hydrogen-instructions.cc

@@ -1018,11 +1018,14 @@ void HPhi::PrintTo(StringStream* stream) {
     value->PrintNameTo(stream);
     stream->Add(" ");
   }
-  stream->Add(" uses%d_%di_%dd_%dt]",
+  stream->Add(" uses%d_%di_%dd_%dt",
               UseCount(),
               int32_non_phi_uses() + int32_indirect_uses(),
               double_non_phi_uses() + double_indirect_uses(),
               tagged_non_phi_uses() + tagged_indirect_uses());
+  stream->Add("%s%s]",
+              is_live() ? "_live" : "",
+              IsConvertibleToInteger() ? "" : "_ncti");
 }