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// Copyright 2009 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.
// Test the paths in the code generator where values in specific
// registers get moved around so that the shift operation can use
// register ECX on ia32 for the shift amount. Other codegen coverage
// tests should go here too.
function identity(x) {
return x;
}
function cover_codegen_paths() {
var x = 1;
var a; // Register EAX
var b; // Register EBX
var c; // Register ECX
var d; // Register EDX
// Register ESI is already used.
var di; // Register EDI
while (x == 1) {
x = identity(1);
a = x + 1;
c = x + 1;
d = x + 1;
b = x + 1;
di = x + 1;
// Locals are in the corresponding registers here.
assertEquals(c << a, 8);
x = identity(1);
a = x + 1;
c = x + 1;
d = x + 1;
b = x + 1;
di = x + 1;
// Locals are in the corresponding registers here.
assertEquals(a << c, 8);
x = identity(1);
a = x + 1;
c = x + 1;
d = x + 1;
b = x + 1;
di = x + 1;
// Locals are in the corresponding registers here.
c = 0; // Free register ecx.
assertEquals(a << d, 8);
x = identity(1);
a = x + 1;
c = x + 1;
d = x + 1;
b = x + 1;
di = x + 1;
// Locals are in the corresponding registers here.
b = 0; // Free register ebx.
assertEquals(a << d, 8);
x = 3;
}
}
cover_codegen_paths();
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