PPC/s390: fix compilation error for incompatible types

Change-Id: I4f4c95c92925c8778ce915d5b37517ad6e0a6145
Reviewed-on: https://chromium-review.googlesource.com/c/1286538Reviewed-by: Joran Siu <joransiu@ca.ibm.com>
Commit-Queue: Junliang Yan <jyan@ca.ibm.com>
Cr-Commit-Position: refs/heads/master@{#56748}

src/ppc/simulator-ppc.cc

@@ -408,7 +408,8 @@ void PPCDebugger::Debug() {
               current_heap->ContainsSlow(obj->address())) {
             PrintF(" (");
             if ((value & 1) == 0) {
-              PrintF("smi %d", PlatformSmiTagging::SmiToInt(obj));
+              PrintF("smi %d", PlatformSmiTagging::SmiToInt(
+                                   reinterpret_cast<Address>(obj)));
             } else {
               obj->ShortPrint();
             }

src/s390/simulator-s390.cc

@@ -424,7 +424,8 @@ void S390Debugger::Debug() {
           Heap* current_heap = sim_->isolate_->heap();
           if (((value & 1) == 0) ||
               current_heap->ContainsSlow(obj->address())) {
-            PrintF("(smi %d)", PlatformSmiTagging::SmiToInt(obj));
+            PrintF("(smi %d)", PlatformSmiTagging::SmiToInt(
+                                   reinterpret_cast<Address>(obj)));
           } else if (current_heap->Contains(obj)) {
             PrintF(" (");
             obj->ShortPrint();