Ensure that all goto instructions have deoptimization target.

runtime/vm/flow_graph_compiler_x64.cc

Index: runtime/vm/flow_graph_compiler_x64.cc
diff --git a/runtime/vm/flow_graph_compiler_x64.cc b/runtime/vm/flow_graph_compiler_x64.cc
index bc5181d8ea0325fd91dbe3c2ae39a86969458b45..2e76af5b98183743a909ac78b335c30e5181972e 100644
--- a/runtime/vm/flow_graph_compiler_x64.cc
+++ b/runtime/vm/flow_graph_compiler_x64.cc
@@ -504,7 +504,10 @@ void FlowGraphCompiler::GenerateInstanceOf(intptr_t token_pos,
     __ pushq(RDX);  // Instantiator type arguments.
     __ LoadObject(RAX, test_cache);
     __ pushq(RAX);
-    GenerateCallRuntime(token_pos, deopt_id, kInstanceofRuntimeEntry, locs);
+    GenerateCallRuntime(token_pos,
+                        deopt_id,
+                        kInstanceofRuntimeEntry,
+                        locs);
     // Pop the parameters supplied to the runtime entry. The result of the
     // instanceof runtime call will be left as the result of the operation.
     __ Drop(5);
@@ -624,14 +627,18 @@ void FlowGraphCompiler::EmitInstructionPrologue(Instruction* instr) {
   if (!is_optimizing()) {
     if (FLAG_enable_type_checks && instr->IsAssertAssignable()) {
       AssertAssignableInstr* assert = instr->AsAssertAssignable();
-      AddCurrentDescriptor(PcDescriptors::kDeoptBefore,
+      AddCurrentDescriptor(PcDescriptors::kDeopt,
                            assert->deopt_id(),
                            assert->token_pos());
     } else if (instr->IsGuardField()) {
       GuardFieldInstr* guard = instr->AsGuardField();
-      AddCurrentDescriptor(PcDescriptors::kDeoptBefore,
+      AddCurrentDescriptor(PcDescriptors::kDeopt,
                            guard->deopt_id(),
                            Scanner::kDummyTokenIndex);
+    } else if (instr->CanBeDeoptimizationTarget()) {
+      AddCurrentDescriptor(PcDescriptors::kDeopt,
+                           instr->deopt_id(),
+                           Scanner::kDummyTokenIndex);
     }
     AllocateRegistersLocally(instr);
   }
@@ -1094,14 +1101,13 @@ void FlowGraphCompiler::GenerateDartCall(intptr_t deopt_id,
   RecordSafepoint(locs);
   // Marks either the continuation point in unoptimized code or the
   // deoptimization point in optimized code, after call.
+  const intptr_t deopt_id_after = Isolate::ToDeoptAfter(deopt_id);
   if (is_optimizing()) {
-    AddDeoptIndexAtCall(deopt_id, token_pos);
+    AddDeoptIndexAtCall(deopt_id_after, token_pos);
   } else {
     // Add deoptimization continuation point after the call and before the
     // arguments are removed.
-    AddCurrentDescriptor(PcDescriptors::kDeoptAfter,
-                         deopt_id,
-                         token_pos);
+    AddCurrentDescriptor(PcDescriptors::kDeopt, deopt_id_after, token_pos);
   }
 }
 
@@ -1116,14 +1122,13 @@ void FlowGraphCompiler::GenerateCallRuntime(intptr_t token_pos,
   if (deopt_id != Isolate::kNoDeoptId) {
     // Marks either the continuation point in unoptimized code or the
     // deoptimization point in optimized code, after call.
+    const intptr_t deopt_id_after = Isolate::ToDeoptAfter(deopt_id);
     if (is_optimizing()) {
-      AddDeoptIndexAtCall(deopt_id, token_pos);
+      AddDeoptIndexAtCall(deopt_id_after, token_pos);
     } else {
       // Add deoptimization continuation point after the call and before the
       // arguments are removed.
-      AddCurrentDescriptor(PcDescriptors::kDeoptAfter,
-                           deopt_id,
-                           token_pos);
+      AddCurrentDescriptor(PcDescriptors::kDeopt, deopt_id_after, token_pos);
     }
   }
 }
@@ -1235,7 +1240,7 @@ void FlowGraphCompiler::EmitMegamorphicInstanceCall(
   __ call(RAX);
   AddCurrentDescriptor(PcDescriptors::kOther, Isolate::kNoDeoptId, token_pos);
   RecordSafepoint(locs);
-  AddDeoptIndexAtCall(deopt_id, token_pos);
+  AddDeoptIndexAtCall(Isolate::ToDeoptAfter(deopt_id), token_pos);
   __ Drop(argument_count);
 }