Merged r15782 into 3.18 branch.

src/full-codegen.h

Index: src/full-codegen.h
diff --git a/src/full-codegen.h b/src/full-codegen.h
index 3734ae52678c950e8a1a6aa88c869de4aa58247a..bb8002218672f0065bcc47a5ab1f4ba464bceacd 100644
--- a/src/full-codegen.h
+++ b/src/full-codegen.h
@@ -135,7 +135,7 @@ class FullCodeGenerator: public AstVisitor {
 #error Unsupported target architecture.
 #endif
 
-  static const int kBackEdgeEntrySize = 2 * kIntSize + kOneByteSize;
+  static const int kBackEdgeEntrySize = 3 * kIntSize;
 
  private:
   class Breakable;
@@ -633,7 +633,7 @@ class FullCodeGenerator: public AstVisitor {
   struct BackEdgeEntry {
     BailoutId id;
     unsigned pc;
-    uint8_t loop_depth;
+    uint32_t loop_depth;
   };
 
   struct TypeFeedbackCellEntry {