X87: Externalize deoptimization reasons.

src/x87/assembler-x87.h

Index: src/x87/assembler-x87.h
diff --git a/src/x87/assembler-x87.h b/src/x87/assembler-x87.h
index 1da632f2660ed768e054c47757fe3c97ecfa141e..94c814f493960a421a57a0cccef37c811775961e 100644
--- a/src/x87/assembler-x87.h
+++ b/src/x87/assembler-x87.h
@@ -935,6 +935,10 @@ class Assembler : public AssemblerBase {
   // write a comment.
   void RecordComment(const char* msg, bool force = false);
 
+  // Record a deoptimization reason that can be used by a log or cpu profiler.
+  // Use --trace-deopt to enable.
+  void RecordDeoptReason(const int reason, const int raw_position);
+
   // Writes a single byte or word of data in the code stream.  Used for
   // inline tables, e.g., jump-tables.
   void db(uint8_t data);