Merge experimental/a64 to bleeding_edge.

test/mjsunit/deopt-with-fp-regs.js

+// Copyright 2013 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (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: --allow-natives-syntax
+
+deopt_trigger = 0;
+side_effect = 0;
+
+function test(a, b, c, d, e, v) {
+  // This test expects some specific input values.
+  assertEquals(10.0, a);
+  assertEquals(20.0, b);
+  assertEquals(30.0, c);
+  assertEquals(40.0, d);
+  assertEquals(50.0, e);
+  assertEquals(1.5, v);
+
+  // Perform a few double calculations.
+  a = a * 0.1;
+  b = b * 0.2;
+  c = c * 0.3;
+  d = d * 0.4;
+  e = e * 0.5;
+
+  // Write to a field of a global object. As for any side effect, a HSimulate
+  // will be introduced after the instructions to support this. If we deopt
+  // later in this function, the execution will resume in full-codegen after
+  // this point.
+  side_effect++;
+  // The following field of the global object will be deleted to force a deopt.
+  // If we use type feedback to deopt, then tests ran with --stress-opt will
+  // not deopt after a few iteration.
+  // If we use %DeoptimizeFunction, all values will be on the frame due to the
+  // call and we will not exercise the translation mechanism handling fp
+  // registers.
+  deopt_trigger = v;
+
+  // Do a few more calculations using the previous values after our deopt point
+  // so the floating point registers which hold those values are recorded in the
+  // environment and will be used during deoptimization.
+  a = a * v;
+  b = b * v;
+  c = c * v;
+  d = d * v;
+  e = e * v;
+
+  // Check that we got the expected results.
+  assertEquals(1.5,  a);
+  assertEquals(6,    b);
+  assertEquals(13.5, c);
+  assertEquals(24,   d);
+  assertEquals(37.5, e);
+}
+
+
+test(10.0, 20.0, 30.0, 40.0, 50.0, 1.5);
+test(10.0, 20.0, 30.0, 40.0, 50.0, 1.5);
+%OptimizeFunctionOnNextCall(test);
+test(10.0, 20.0, 30.0, 40.0, 50.0, 1.5);
+assertTrue(2 != %GetOptimizationStatus(test));
+
+// By deleting the field we are forcing the code to deopt when the field is
+// read on next execution.
+delete deopt_trigger;
+test(10.0, 20.0, 30.0, 40.0, 50.0, 1.5);
+assertTrue(1 != %GetOptimizationStatus(test));