Support register as right operand in min/max support.

test/mjsunit/regress/regress-crbug-145961.js

Index: test/mjsunit/regress/regress-crbug-145961.js
diff --git a/test/mjsunit/regress/regress-110509.js b/test/mjsunit/regress/regress-crbug-145961.js
similarity index 85%
copy from test/mjsunit/regress/regress-110509.js
copy to test/mjsunit/regress/regress-crbug-145961.js
index 132bd233bee32f6c84061049224ea43901dae06a..b05cf11cc3c93d8de3631ea5e024886a1d5873ec 100644
--- a/test/mjsunit/regress/regress-110509.js
+++ b/test/mjsunit/regress/regress-crbug-145961.js
@@ -25,17 +25,15 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
+// This test causes the operands to be passed in as Integer32 registers.
 // Flags: --allow-natives-syntax
-
-// Verify that LRandom preserves rsi correctly.
-
-function foo() {
-  Math.random();
-  new Function("");
+function test() {
+  var a = new Int32Array(2);
+  var x = a[0];
+  return Math.min(x, x);
 }
 
-foo();
-foo();
-foo();
-%OptimizeFunctionOnNextCall(foo);
-foo();
+assertEquals(-1, test());
+assertEquals(-1, test());
+%OptimizeFunctionOnNextCall(test);
+assertEquals(-1, test());