Add position information for compares, binary ops, and count

src/x64/full-codegen-x64.cc

Index: src/x64/full-codegen-x64.cc
===================================================================
--- src/x64/full-codegen-x64.cc	(revision 5328)
+++ src/x64/full-codegen-x64.cc	(working copy)
@@ -2696,6 +2696,7 @@
 
 void FullCodeGenerator::VisitCountOperation(CountOperation* expr) {
   Comment cmnt(masm_, "[ CountOperation");
+  SetSourcePosition(expr->position());
 
   // Invalid left-hand-sides are rewritten to have a 'throw
   // ReferenceError' as the left-hand side.
@@ -2974,6 +2975,7 @@
 
 void FullCodeGenerator::VisitCompareOperation(CompareOperation* expr) {
   Comment cmnt(masm_, "[ CompareOperation");
+  SetSourcePosition(expr->position());
 
   // Always perform the comparison for its control flow.  Pack the result
   // into the expression's context after the comparison is performed.