Fix bug with GVN on array loads.

test/mjsunit/regress/regress-85177.js

+// Copyright 2011 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
+
+gW=gH=175;
+g=[];
+
+for(var n=0; n<gW; n++){
+ var l=[];
+ for(var p=0; p<gH; p++){
+   l.push(1)
+ }
+ g.push(l)
+}
+
+function k(a,b){
+ if(a<0||b<0||a>=gW||b>=gH)
+   return 0;
+ return g[a][b];
+}
+
+function f(){
+ for(var a=[],f=0; f<gW; f++){
+   var b=[];
+   for(var h=0; h<gH; h++){
+     var e=0;
+     for(var i=-1; i<=1; i++)
+       for(var j=-1; j<=1; j++)
+          e+=k(f+i,h+j);
+     e=k(f,h)==1?1:0;
+     b.push(e)
+   }
+   a.push(b)
+ }
+}
+
+f();
+%OptimizeFunctionOnNextCall(f);
+f();
+