Support for unboxed 64-bit integer bitwise operations and equality on ia32.

runtime/vm/flow_graph_compiler_ia32.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/globals.h"  // Needed here to get TARGET_ARCH_IA32.
 #if defined(TARGET_ARCH_IA32)
 
 #include "vm/flow_graph_compiler.h"
 
 #include "lib/error.h"
 #include "vm/ast_printer.h"
 #include "vm/il_printer.h"
 #include "vm/locations.h"
 #include "vm/object_store.h"
 #include "vm/parser.h"
 #include "vm/stub_code.h"
 #include "vm/symbols.h"
 
 namespace dart {
 
 DECLARE_FLAG(bool, print_ast);
 DECLARE_FLAG(bool, print_scopes);
 DECLARE_FLAG(bool, reject_named_argument_as_positional);
 DECLARE_FLAG(bool, trace_functions);
+DECLARE_FLAG(bool, use_sse41);
+DEFINE_FLAG(bool, trap_on_deoptimization, false, "Trap on deoptimization.");
+DEFINE_FLAG(bool, unbox_integers, true, "Optimize 64-bit integer arithmetic.");

[srdjan, 2012/09/28 16:50:26]

Should this be 'unbox_mints' since it does not do anything for unboxed  Smi-s?

[Florian Schneider, 2012/10/02 11:10:31]

Done.

+
+
+bool FlowGraphCompiler::SupportsUnboxedMints() {
+  // Support unboxed mints when SSE 4.1 is available.
+  return FLAG_unbox_integers
+      && CPUFeatures::sse4_1_supported()
+      && FLAG_use_sse41;
+}
 
 
 void CompilerDeoptInfoWithStub::GenerateCode(FlowGraphCompiler* compiler,
                                              intptr_t stub_ix) {
   // Calls do not need stubs, they share a deoptimization trampoline.
   ASSERT(reason() != kDeoptAtCall);
   Assembler* assem = compiler->assembler();
 #define __ assem->
   __ Comment("Deopt stub for id %"Pd"", deopt_id());
   __ Bind(entry_label());
+  if (FLAG_trap_on_deoptimization) __ int3();
 
   ASSERT(deoptimization_env() != NULL);
 
   if (compiler->IsLeaf()) {
     Label L;
     __ pushl(EAX);  // Preserve EAX.
     __ call(&L);
     const intptr_t offset = assem->CodeSize();
     __ Bind(&L);
     __ popl(EAX);
@@ skipping 1322 matching lines @@
   __ popl(ECX);
   __ popl(EAX);
 }
 
 
 #undef __
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_IA32