Check elimination: Learn from if(CompareMap(x)) on true branch.

test/mjsunit/compiler/compare_map_elim.js

Index: test/mjsunit/compiler/compare_map_elim.js
diff --git a/test/mjsunit/regress/regress-982.js b/test/mjsunit/compiler/compare_map_elim.js
similarity index 86%
copy from test/mjsunit/regress/regress-982.js
copy to test/mjsunit/compiler/compare_map_elim.js
index d88543a74d430317bf4a75576b48c497962e14af..288d4811a6811691366841f7693495f6c785da9e 100644
--- a/test/mjsunit/regress/regress-982.js
+++ b/test/mjsunit/compiler/compare_map_elim.js
@@ -25,21 +25,27 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-function f(a) {
- return {className: 'xxx'};
-};
+// Flags: --allow-natives-syntax --check-elimination
 
-var x = 1;
+a = {
+  f: function() { this.y = 3; }
+};
+b = {
+  f: function() { this.y = 4; }
+};
 
-function g(active) {
- for (i = 1; i <= 20000; i++) {
-   if (i == active) {
-     x = i;
-     if (f("" + i) != null) { }
-   } else {
-     if (f("" + i) != null) { }
-   }
- }
+function x(z) {
+  return z.f();
 }
 
-g(0);
+x(a);
+x(b);
+x(a);
+x(b);
+x(a);
+x(b);
+
+%OptimizeFunctionOnNextCall(x)
+
+x(a);
+x(b);