VM: Don't depend on unoptimized code when inlining and creating deoptimization info.

runtime/vm/flow_graph_compiler.cc

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/globals.h"  // Needed here to get TARGET_ARCH_XXX.
 
 #include "vm/flow_graph_compiler.h"
 
 #include "vm/bit_vector.h"
 #include "vm/cha.h"
@@ skipping 371 matching lines @@
     EmitTrySync(instr, CurrentTryIndex());
   }
 }
 
 
 
 void FlowGraphCompiler::EmitSourceLine(Instruction* instr) {
   if ((instr->token_pos() == Scanner::kNoSourcePos) || (instr->env() == NULL)) {
     return;
   }
-  const Function& function =
-      Function::Handle(instr->env()->code().function());
-  const Script& s = Script::Handle(function.script());
+  const Script& script =
+      Script::Handle(zone(), instr->env()->function().script());
   intptr_t line_nr;
   intptr_t column_nr;
-  s.GetTokenLocation(instr->token_pos(), &line_nr, &column_nr);
-  const String& line = String::Handle(s.GetLine(line_nr));
+  script.GetTokenLocation(instr->token_pos(), &line_nr, &column_nr);
+  const String& line = String::Handle(zone(), script.GetLine(line_nr));
   assembler()->Comment("Line %" Pd " in '%s':\n           %s",
-      line_nr, function.ToFullyQualifiedCString(), line.ToCString());
+      line_nr,
+      instr->env()->function().ToFullyQualifiedCString(),
+      line.ToCString());
 }
 
 
 static void LoopInfoComment(
     Assembler* assembler,
     const BlockEntryInstr& block,
     const ZoneGrowableArray<BlockEntryInstr*>& loop_headers) {
   if (Assembler::EmittingComments()) {
     for (intptr_t loop_id = 0; loop_id < loop_headers.length(); ++loop_id) {
       for (BitVector::Iterator loop_it(loop_headers[loop_id]->loop_info());
@@ skipping 1411 matching lines @@
 
 
 void FlowGraphCompiler::FrameStateClear() {
   ASSERT(!is_optimizing());
   frame_state_.TruncateTo(0);
 }
 #endif
 
 
 }  // namespace dart