Populate relocation information correctly for RelocatableInt32Constants.

test/mjsunit/wasm/grow-memory.js

Index: test/mjsunit/wasm/grow-memory.js
diff --git a/test/mjsunit/wasm/grow-memory.js b/test/mjsunit/wasm/grow-memory.js
index 27aca22d1a68060dc3ea95371046cbe5be9cbf4f..11e6aa5e555d16d2e7644b10c70f4950fa618e0c 100644
--- a/test/mjsunit/wasm/grow-memory.js
+++ b/test/mjsunit/wasm/grow-memory.js
@@ -117,3 +117,20 @@ function testGrowMemoryTrapMaxPages() {
 }
 
 testGrowMemoryTrapMaxPages();
+
+function testGrowMemoryCurrentMemory() {
+  var builder = genGrowMemoryBuilder();
+  builder.addMemory(1, 1, false);
+  builder.addFunction("memory_size", kSig_i_v)
+      .addBody([kExprMemorySize])
+      .exportFunc();
+  var module = builder.instantiate();
+  function growMem(pages) { return module.exports.grow_memory(pages); }
+  function MemSize() { return module.exports.memory_size(); }
+
+  assertEquals(65536, MemSize());
+  assertEquals(1, growMem(1));
+  assertEquals(131072, MemSize());
+}
+
+testGrowMemoryCurrentMemory();