Tests that --fields_may_be_reset, --link_natives_lazily, and --no_allow_absolute_addresses work in …

runtime/vm/intermediate_language_x64.cc

Index: runtime/vm/intermediate_language_x64.cc
diff --git a/runtime/vm/intermediate_language_x64.cc b/runtime/vm/intermediate_language_x64.cc
index 1f840fd9211b9782ca373355fee1977cb67668cf..b10240ea68cca23fc5bf7c6192a84d78ac62db2e 100644
--- a/runtime/vm/intermediate_language_x64.cc
+++ b/runtime/vm/intermediate_language_x64.cc
@@ -2613,9 +2613,14 @@ class CheckStackOverflowSlowPath : public SlowPathCode {
       Register temp = instruction_->locs()->temp(0).reg();
       __ Comment("CheckStackOverflowSlowPathOsr");
       __ Bind(osr_entry_label());
-      ASSERT(FLAG_allow_absolute_addresses);
-      __ LoadImmediate(temp, Immediate(flags_address));
-      __ movq(Address(temp, 0), Immediate(Isolate::kOsrRequest));
+      if (FLAG_allow_absolute_addresses) {
+        __ LoadImmediate(temp, Immediate(flags_address));
+        __ movq(Address(temp, 0), Immediate(Isolate::kOsrRequest));
+      } else {
+        __ LoadIsolate(TMP);
+        __ movq(Address(TMP, Isolate::stack_overflow_flags_offset()),
+                Immediate(Isolate::kOsrRequest));
+      }
     }
     __ Comment("CheckStackOverflowSlowPath");
     __ Bind(entry_label());