Promote to long before shifting when computing array size

(cherry picked from commit 463949b)

compiler/src/org.graalvm.compiler.replacements/src/org/graalvm/compiler/replacements/AllocationSnippets.java

@@ -123,7 +123,7 @@ protected UnsignedWord arrayAllocationSize(int length, int arrayBaseOffset, int
      * We do an unsigned multiplication so that a negative array length will result in an array size
      * greater than Integer.MAX_VALUE.
      */
-    public static long arrayAllocationSize(int length, int arrayBaseOffset, int log2ElementSize, int alignment) {
+    public static long arrayAllocationSize(long length, int arrayBaseOffset, int log2ElementSize, int alignment) {
         long size = ((length & 0xFFFFFFFFL) << log2ElementSize) + arrayBaseOffset + (alignment - 1);
         long mask = ~(alignment - 1);
         return size & mask;