[compiler] Fix confusion about OSR BailoutId semantics.

test/mjsunit/regress/regress-5380.js

Index: test/mjsunit/regress/regress-5380.js
diff --git a/test/mjsunit/regress/regress-crbug-645103.js b/test/mjsunit/regress/regress-5380.js
similarity index 56%
copy from test/mjsunit/regress/regress-crbug-645103.js
copy to test/mjsunit/regress/regress-5380.js
index 4f5f6629015d0a680940ef4cd1760f18a74ca7d2..98811083790dfa3f8aa1ca1b7f489d40f5fc87af 100644
--- a/test/mjsunit/regress/regress-crbug-645103.js
+++ b/test/mjsunit/regress/regress-5380.js
@@ -4,14 +4,14 @@
 
 // Flags: --allow-natives-syntax --ignition-staging --turbo
 
-class Base {}
-class Subclass extends Base {
-  constructor() {
-    %DeoptimizeNow();
-    super();
+function f(do_osr) {
+  for (var i = 0; i < 3; ++i) {
+    if (i == 1 && do_osr) %OptimizeOsr();
   }
 }
-new Subclass();
-new Subclass();
-%OptimizeFunctionOnNextCall(Subclass);
-new Subclass();
+
+f(false);
+f(false);
+%BaselineFunctionOnNextCall(f);
+f(false);
+f(true);