Nitpicking.

runtime/vm/flow_graph_builder.cc

 // Copyright (c) 2012, 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/flow_graph_builder.h"
 
 #include "vm/ast_printer.h"
 #include "vm/bit_vector.h"
 #include "vm/code_descriptors.h"
 #include "vm/dart_entry.h"
 #include "vm/flags.h"
 #include "vm/il_printer.h"
 #include "vm/intermediate_language.h"
 #include "vm/longjump.h"
 #include "vm/object_store.h"
 #include "vm/os.h"
 #include "vm/parser.h"
 #include "vm/resolver.h"
 #include "vm/stub_code.h"
 #include "vm/symbols.h"
 
 namespace dart {
 
 DEFINE_FLAG(bool, eliminate_type_checks, true,
             "Eliminate type checks when allowed by static type analysis.");
 DEFINE_FLAG(bool, print_ast, false, "Print abstract syntax tree.");
 DEFINE_FLAG(bool, print_flow_graph, false, "Print the IR flow graph.");
 DEFINE_FLAG(bool, trace_type_check_elimination, false,
             "Trace type check elimination at compile time.");
-#if defined(TARGET_ARCH_X64)
-DEFINE_FLAG(bool, use_ssa, true, "Use SSA form");
-#else
-DEFINE_FLAG(bool, use_ssa, false, "Use SSA form");
-#endif
 DECLARE_FLAG(bool, enable_type_checks);
 
 
 FlowGraphBuilder::FlowGraphBuilder(const ParsedFunction& parsed_function)
   : parsed_function_(parsed_function),
     preorder_block_entries_(),
     postorder_block_entries_(),
     context_level_(0),
     last_used_try_index_(CatchClauseNode::kInvalidTryIndex),
     try_index_(CatchClauseNode::kInvalidTryIndex),
@@ skipping 2546 matching lines @@
         }
       }
     }
   }
 
   // 2. Process normal instructions.
   for (ForwardInstructionIterator it(block_entry); !it.Done(); it.Advance()) {
     Instruction* current = it.Current();
     // Attach current environment to the instruction.
     // TODO(fschneider): Currently each instruction gets a full copy of the
-    // enviroment. This should be optimized: Only instructions that can
-    // deoptimize will should have uses of the environment values.
+    // environment. This should be optimized: Only instructions that can
+    // deoptimize should have uses of the environment values.
     current->set_env(new Environment(*env));
 
     // 2a. Handle uses:
     // Update expression stack environment for each use.
     // For each use of a LoadLocal or StoreLocal: Replace it with the value
     // from the environment.
     for (intptr_t i = 0; i < current->InputCount(); ++i) {
       Value* v = current->InputAt(i);
       if (!v->IsUse()) continue;
       // Update expression stack.
@@ skipping 88 matching lines @@
   char* chars = reinterpret_cast<char*>(
       Isolate::Current()->current_zone()->Allocate(len));
   OS::SNPrint(chars, len, kFormat, function_name, reason);
   const Error& error = Error::Handle(
       LanguageError::New(String::Handle(String::New(chars))));
   Isolate::Current()->long_jump_base()->Jump(1, error);
 }
 
 
 }  // namespace dart