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Side by Side Diff: test/mjsunit/never-optimize.js

Issue 18214005: Added %NeverOptimize runtime call that can disable optimizations for a method for tests. (Closed) Base URL: https://v8.googlecode.com/svn/branches/bleeding_edge
Patch Set: Created 7 years, 5 months ago
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1 // Copyright 2013 the V8 project authors. All rights reserved. 1 // Copyright 2013 the V8 project authors. All rights reserved.
2 // Redistribution and use in source and binary forms, with or without 2 // Redistribution and use in source and binary forms, with or without
3 // modification, are permitted provided that the following conditions are 3 // modification, are permitted provided that the following conditions are
4 // met: 4 // met:
5 // 5 //
6 // * Redistributions of source code must retain the above copyright 6 // * Redistributions of source code must retain the above copyright
7 // notice, this list of conditions and the following disclaimer. 7 // notice, this list of conditions and the following disclaimer.
8 // * Redistributions in binary form must reproduce the above 8 // * Redistributions in binary form must reproduce the above
9 // copyright notice, this list of conditions and the following 9 // copyright notice, this list of conditions and the following
10 // disclaimer in the documentation and/or other materials provided 10 // disclaimer in the documentation and/or other materials provided
11 // with the distribution. 11 // with the distribution.
12 // * Neither the name of Google Inc. nor the names of its 12 // * Neither the name of Google Inc. nor the names of its
13 // contributors may be used to endorse or promote products derived 13 // contributors may be used to endorse or promote products derived
14 // from this software without specific prior written permission. 14 // from this software without specific prior written permission.
15 // 15 //
16 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 16 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 17 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 18 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 19 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 20 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 21 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 25 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 27
28 // Flags: --allow-natives-syntax 28 // Flags: --allow-natives-syntax
29 29
30 function f(i, b) { 30 function o1() {
31 var a = 0;
32 if (b) {
33 var c = 1 << i;
34 a = c + c;
35 }
36 var x = a >> 3;
37 return a;
38 } 31 }
39 32
40 f(1, false); 33 if (%GetOptimizationStatus(o1) != 4) {
41 f(1, true); 34 // 4 == optimization disabled.
42 %OptimizeFunctionOnNextCall(f); 35 o1(); o1();
43 assertEquals((1 << 30) * 2, f(30, true)); 36 %OptimizeFunctionOnNextCall(o1);
37 o1();
44 38
39 // check that the given function was optimized.
40 var o1_status = %GetOptimizationStatus(o1);
41 assertTrue(o1_status == 1 // optimized
42 || o1_status == 3 // optimized (always opt)
43 || o1_status == 5); // lazy recompile requested
45 44
46 var global = 1; 45 // Test the %NeverOptimize runtime call.
46 function u1() {
47 %NeverOptimize();
48 }
47 49
48 function f2(b) { 50 function u2() {
49 var a = 0;
50 if (b) {
51 a = global;
52 } 51 }
53 var x = a >> 3;
54 return a;
55 }
56 52
57 f2(false); 53 u1(); u1();
58 f2(true); 54 u2(); u2();
59 %OptimizeFunctionOnNextCall(f2); 55
60 global = 2.5; 56 %NeverOptimize(u2);
61 assertEquals(global, f2(true)); 57
58 %OptimizeFunctionOnNextCall(u1);
59 %OptimizeFunctionOnNextCall(u2);
60
61 u1(); u1();
62 u2(); u2();
63
64 // 2 => not optimized.
65 assertEquals(2, %GetOptimizationStatus(u1));
66 assertEquals(2, %GetOptimizationStatus(u2));
67
68 }
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