Capture register clearing on loop iteration

src/regexp-macro-assembler-tracer.cc

Index: src/regexp-macro-assembler-tracer.cc
diff --git a/src/regexp-macro-assembler-tracer.cc b/src/regexp-macro-assembler-tracer.cc
index c733a2fcc432c40e78603c7e518b31807e797650..5caf032897bd7b64bb1cc9eace902ad52c9f6b52 100644
--- a/src/regexp-macro-assembler-tracer.cc
+++ b/src/regexp-macro-assembler-tracer.cc
@@ -150,6 +150,12 @@ void RegExpMacroAssemblerTracer::WriteCurrentPositionToRegister(int reg,
 }
 
 
+void RegExpMacroAssemblerTracer::ClearRegister(int reg) {
+  PrintF(" ClearRegister(register=%d);\n", reg);
+  assembler_->ClearRegister(reg);
+}
+
+
 void RegExpMacroAssemblerTracer::ReadCurrentPositionFromRegister(int reg) {
   PrintF(" ReadCurrentPositionFromRegister(register=%d);\n", reg);
   assembler_->ReadCurrentPositionFromRegister(reg);