Avoid wrong imul deopt on ia32 and x64 (fixes v8 bug 2339).

test/mjsunit/regress/regress-1117.js

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+// Flags: --allow-natives-syntax
+
 // Test that we actually return the right value (-0) when we multiply
 // constant 0 with a negative integer.
 
 function foo(y) {return 0 * y; }
 for( var i = 0; i< 1000000; i++){

[Jakob Kummerow, 2012/09/26 09:26:41]

While you are at it, please replace this loop with %OptimizeFunctionOnNextCall
(just have it do the same as for bar() below).

   foo(42);
 }
 assertEquals(1/foo(-42), -Infinity);
+
+function bar(x) { return x * 0; }
+assertEquals(Infinity, 1/bar(5));
+assertEquals(Infinity, 1/bar(5));
+%OptimizeFunctionOnNextCall(bar);
+assertEquals(-Infinity, 1/bar(-5));
+