use MemoryBlock in hashBytesByIntBlock according to kiszk's comment

mgaido91 · mgaido91 · commit 6cb94ed5ed76 · 2018-09-05T15:56:03.000+02:00
diff --git a/common/unsafe/src/main/java/org/apache/spark/unsafe/hash/Murmur3_x86_32.java b/common/unsafe/src/main/java/org/apache/spark/unsafe/hash/Murmur3_x86_32.java
@@ -117,12 +117,10 @@ public static int hashUnsafeBytes2Block(MemoryBlock base, int seed) {
   }
 
   private static int hashBytesByIntBlock(MemoryBlock base, int lengthInBytes, int seed) {
-    Object o = base.getBaseObject();
-    long offset = base.getBaseOffset();
     assert (lengthInBytes % 4 == 0);
     int h1 = seed;
     for (int i = 0; i < lengthInBytes; i += 4) {
-      int halfWord = Platform.getInt(o, offset + i);
+      int halfWord = base.getInt(i);
       int k1 = mixK1(halfWord);
       h1 = mixH1(h1, k1);
     }

Original file line number	Diff line number	Diff line change
`@@ -117,12 +117,10 @@ public static int hashUnsafeBytes2Block(MemoryBlock base, int seed) {`
`117`	`117`	`}`
`118`	`118`
`119`	`119`	`private static int hashBytesByIntBlock(MemoryBlock base, int lengthInBytes, int seed) {`
`120`		`- Object o = base.getBaseObject();`
`121`		`- long offset = base.getBaseOffset();`
`122`	`120`	`assert (lengthInBytes % 4 == 0);`
`123`	`121`	`int h1 = seed;`
`124`	`122`	`for (int i = 0; i < lengthInBytes; i += 4) {`
`125`		`- int halfWord = Platform.getInt(o, offset + i);`
	`123`	`+ int halfWord = base.getInt(i);`
`126`	`124`	`int k1 = mixK1(halfWord);`
`127`	`125`	`h1 = mixH1(h1, k1);`
`128`	`126`	`}`