Upload Kmake

deps/v8/test/mjsunit/maglev/osr-from-ml-to-tf.js

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+// Copyright 2022 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+// Flags: --allow-natives-syntax --maglev --no-stress-opt
+// Flags: --no-baseline-batch-compilation --use-osr --turbofan
+//
+// Disable small-function TF optimization to avoid flakes that unexpectedly
+// tier up `f` before we get a chance to enter the OSR loop.
+// Flags: --max-bytecode-size-for-early-opt=0
+// Flags: --osr-from-maglev --concurrent-osr --concurrent-recompilation
+// Flags: --always-osr-from-maglev
+
+let keep_going = 10000000;  // A counter to avoid test hangs on failure.
+let i;  // The loop counter for the test function.
+
+function f() {
+  let sum = i;
+  while (--i > 0 && !%CurrentFrameIsTurbofan() && --keep_going) {
+    // This loop should trigger OSR.
+    sum += i;
+  }
+  return sum;
+}
+
+function g() {
+  assertTrue(%IsMaglevEnabled());
+  assertTrue(%IsTurbofanEnabled());
+
+  while (!%ActiveTierIsMaglev(f) && --keep_going) {
+    i = 5.2;
+    f();
+  }
+
+  i = 66666666666;
+  f();
+  assertTrue(keep_going > 0);
+}
+%NeverOptimizeFunction(g);
+
+g();