[cleanup] Minor cleanups concerning assemblers and code generation.

src/objects.cc

Index: src/objects.cc
diff --git a/src/objects.cc b/src/objects.cc
index 1ff56694c08f3a9a4d18fc820ff1ab2311b775d9..f7bb7c41fab08881afd526c294b1fdb38b61e2ff 100644
--- a/src/objects.cc
+++ b/src/objects.cc
@@ -13988,7 +13988,6 @@ void Code::CopyFrom(const CodeDesc& desc) {
             static_cast<size_t>(desc.reloc_size));
 
   // unbox handles and relocate
-  intptr_t delta = instruction_start() - desc.buffer;
   int mode_mask = RelocInfo::kCodeTargetMask |
                   RelocInfo::ModeMask(RelocInfo::EMBEDDED_OBJECT) |
                   RelocInfo::ModeMask(RelocInfo::CELL) |
@@ -14008,8 +14007,8 @@ void Code::CopyFrom(const CodeDesc& desc) {
       it.rinfo()->set_target_cell(*cell, UPDATE_WRITE_BARRIER,
                                   SKIP_ICACHE_FLUSH);
     } else if (RelocInfo::IsCodeTarget(mode)) {
-      // rewrite code handles in inline cache targets to direct
-      // pointers to the first instruction in the code object
+      // rewrite code handles to direct pointers to the first instruction in the
+      // code object
       Handle<Object> p = it.rinfo()->target_object_handle(origin);
       Code* code = Code::cast(*p);
       it.rinfo()->set_target_address(GetIsolate(), code->instruction_start(),
@@ -14023,6 +14022,7 @@ void Code::CopyFrom(const CodeDesc& desc) {
       Code* code = Code::cast(*p);
       it.rinfo()->set_code_age_stub(code, SKIP_ICACHE_FLUSH);
     } else {
+      intptr_t delta = instruction_start() - desc.buffer;
       it.rinfo()->apply(delta);
     }
   }