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Issue 2486923004: [crankshaft] Fix constant folding of HDiv instruction. (Closed)
Patch Set: Created 4 years, 1 month ago
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1 // Copyright 2016 the V8 project authors. All rights reserved. 1 // Copyright 2016 the V8 project authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be 2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file. 3 // found in the LICENSE file.
4 4
5 // Flags: --allow-natives-syntax --fold-constants 5 // Flags: --allow-natives-syntax --fold-constants
6 6
7 var zero = 0; 7 var zero = 0;
8 8
9 function f() { 9 (function ConstantFoldZeroDivZero() {
10 return 0 / zero; 10 function f() {
11 } 11 return 0 / zero;
12 assertTrue(isNaN(f())); 12 }
13 assertTrue(isNaN(f())); 13 assertTrue(isNaN(f()));
14 %OptimizeFunctionOnNextCall(f); 14 assertTrue(isNaN(f()));
15 assertTrue(isNaN(f())); 15 %OptimizeFunctionOnNextCall(f);
16 assertTrue(isNaN(f()));
17 })();
16 18
17 function g() { 19 (function ConstantFoldMinusZeroDivZero() {
18 return -0 / zero; 20 function f() {
19 } 21 return -0 / zero;
20 assertTrue(isNaN(g())); 22 }
21 assertTrue(isNaN(g())); 23 assertTrue(isNaN(f()));
22 %OptimizeFunctionOnNextCall(g); 24 assertTrue(isNaN(f()));
23 assertTrue(isNaN(g())); 25 %OptimizeFunctionOnNextCall(f);
26 assertTrue(isNaN(f()));
27 })();
28
29 (function ConstantFoldNaNDivZero() {
30 function f() {
31 return NaN / 0;
32 }
33 assertTrue(isNaN(f()));
34 assertTrue(isNaN(f()));
35 %OptimizeFunctionOnNextCall(f);
36 assertTrue(isNaN(f()));
37 })();
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