[mjsunit] Improve performance of compiler/osr-assert test

This test currently takes nearly 10 minutes on the arm64 debug builder.

Bug: v8:7783
Change-Id: I500fc026b01873e666f32062d790eca3f34455b9
Reviewed-on: https://chromium-review.googlesource.com/c/1318495
Commit-Queue: Adam Klein <adamk@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#57298}

test/mjsunit/compiler/osr-assert.js

@@ -25,17 +25,20 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-// Flags: --use-osr
+// Flags: --use-osr --allow-natives-syntax
 
 function f(x, b, c) {
-  var outer = 1000000;
+  var outer = 10;
   var a = 1;
   while (outer > 0) {
     a = a + 5;
     assertEquals(b + 1, c);
     outer--;
+    if (outer === 5) {
+      %OptimizeOsr();
+    }
   }
   return a + 4;
 }
 
-assertEquals(5000005, f(5, "122", "1221"));
+assertEquals(55, f(5, "122", "1221"));

test/mjsunit/mjsunit.status

@@ -368,7 +368,6 @@
   'array-splice': [PASS, SLOW],
   'bit-not': [PASS, SLOW],
   'compiler/alloc-number': [PASS, SLOW],
-  'compiler/osr-assert': [PASS, SLOW],
   'compiler/osr-with-args': [PASS, SLOW],
   'generated-transition-stub': [PASS, SLOW],
   'json2': [PASS, SLOW],