Remove dead code from IfThenElse and StrictCompare in the compiler.

runtime/vm/flow_graph_compiler_x64.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_X64.
 #if defined(TARGET_ARCH_X64)
 
 #include "vm/flow_graph_compiler.h"
 
 #include "vm/ast_printer.h"
@@ skipping 1460 matching lines @@
                    locs);
   AddStaticCallTarget(function);
   __ Drop(argument_count);
 }
 
 
 void FlowGraphCompiler::EmitEqualityRegConstCompare(Register reg,
                                                     const Object& obj,
                                                     bool needs_number_check,
                                                     intptr_t token_pos) {
-  if (needs_number_check) {
-    if (!obj.IsMint() && !obj.IsDouble() && !obj.IsBigint()) {
-      needs_number_check = false;
-    }
-  }
+  ASSERT(!needs_number_check ||
+         (!obj.IsMint() && !obj.IsDouble() && !obj.IsBigint()));
 
   if (obj.IsSmi() && (Smi::Cast(obj).Value() == 0)) {
     ASSERT(!needs_number_check);
     __ testq(reg, reg);
     return;
   }
 
   if (needs_number_check) {
     __ pushq(reg);
     __ PushObject(obj, PP);
@@ skipping 402 matching lines @@
   __ movups(reg, Address(RSP, 0));
   __ AddImmediate(RSP, Immediate(kFpuRegisterSize), PP);
 }
 
 
 #undef __
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_X64