[turbofan] Remove unused --inline-accessors flag

This flag has had no effect since mid 2017 when its use-site was
accidentally removed (in https://codereview.chromium.org/2902533003).

Change-Id: I81436b064c2664deff781ad6d75ad47937e3fdc0
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1934333
Auto-Submit: Georg Neis <neis@chromium.org>
Reviewed-by: Mythri Alle <mythria@chromium.org>
Reviewed-by: Michael Stanton <mvstanton@chromium.org>
Commit-Queue: Michael Stanton <mvstanton@chromium.org>
Cr-Commit-Position: refs/heads/master@{#65172}

src/codegen/optimized-compilation-info.h

@@ -44,28 +44,27 @@ class V8_EXPORT_PRIVATE OptimizedCompilationInfo final {
   // Various configuration flags for a compilation, as well as some properties
   // of the compiled code produced by a compilation.
   enum Flag {
-    kAccessorInliningEnabled = 1 << 0,
-    kFunctionContextSpecializing = 1 << 1,
-    kInliningEnabled = 1 << 2,
-    kDisableFutureOptimization = 1 << 3,
-    kSplittingEnabled = 1 << 4,
-    kSourcePositionsEnabled = 1 << 5,
-    kBailoutOnUninitialized = 1 << 6,
-    kLoopPeelingEnabled = 1 << 7,
-    kUntrustedCodeMitigations = 1 << 8,
-    kSwitchJumpTableEnabled = 1 << 9,
-    kCalledWithCodeStartRegister = 1 << 10,
-    kPoisonRegisterArguments = 1 << 11,
-    kAllocationFoldingEnabled = 1 << 12,
-    kAnalyzeEnvironmentLiveness = 1 << 13,
-    kTraceTurboJson = 1 << 14,
-    kTraceTurboGraph = 1 << 15,
-    kTraceTurboScheduled = 1 << 16,
-    kTraceTurboAllocation = 1 << 17,
-    kTraceHeapBroker = 1 << 18,
-    kWasmRuntimeExceptionSupport = 1 << 19,
-    kTurboControlFlowAwareAllocation = 1 << 20,
-    kTurboPreprocessRanges = 1 << 21
+    kFunctionContextSpecializing = 1 << 0,
+    kInliningEnabled = 1 << 1,
+    kDisableFutureOptimization = 1 << 2,
+    kSplittingEnabled = 1 << 3,
+    kSourcePositionsEnabled = 1 << 4,
+    kBailoutOnUninitialized = 1 << 5,
+    kLoopPeelingEnabled = 1 << 6,
+    kUntrustedCodeMitigations = 1 << 7,
+    kSwitchJumpTableEnabled = 1 << 8,
+    kCalledWithCodeStartRegister = 1 << 9,
+    kPoisonRegisterArguments = 1 << 10,
+    kAllocationFoldingEnabled = 1 << 11,
+    kAnalyzeEnvironmentLiveness = 1 << 12,
+    kTraceTurboJson = 1 << 13,
+    kTraceTurboGraph = 1 << 14,
+    kTraceTurboScheduled = 1 << 15,
+    kTraceTurboAllocation = 1 << 16,
+    kTraceHeapBroker = 1 << 17,
+    kWasmRuntimeExceptionSupport = 1 << 18,
+    kTurboControlFlowAwareAllocation = 1 << 19,
+    kTurboPreprocessRanges = 1 << 20
   };
 
   // Construct a compilation info for optimized compilation.
@@ -113,11 +112,6 @@ class V8_EXPORT_PRIVATE OptimizedCompilationInfo final {
     return GetFlag(kFunctionContextSpecializing);
   }
 
-  void MarkAsAccessorInliningEnabled() { SetFlag(kAccessorInliningEnabled); }
-  bool is_accessor_inlining_enabled() const {
-    return GetFlag(kAccessorInliningEnabled);
-  }
-
   void MarkAsSourcePositionsEnabled() { SetFlag(kSourcePositionsEnabled); }
   bool is_source_positions_enabled() const {
     return GetFlag(kSourcePositionsEnabled);

src/compiler/js-native-context-specialization.h

@@ -44,11 +44,7 @@ class V8_EXPORT_PRIVATE JSNativeContextSpecialization final
     : public AdvancedReducer {
  public:
   // Flags that control the mode of operation.
-  enum Flag {
-    kNoFlags = 0u,
-    kAccessorInliningEnabled = 1u << 0,
-    kBailoutOnUninitialized = 1u << 1
-  };
+  enum Flag { kNoFlags = 0u, kBailoutOnUninitialized = 1u << 0 };
   using Flags = base::Flags<Flag>;
 
   JSNativeContextSpecialization(Editor* editor, JSGraph* jsgraph,

src/compiler/pipeline.cc

@@ -1003,9 +1003,6 @@ PipelineCompilationJob::Status PipelineCompilationJob::PrepareJobImpl(
   if (FLAG_turbo_inlining) {
     compilation_info()->MarkAsInliningEnabled();
   }
-  if (FLAG_inline_accessors) {
-    compilation_info()->MarkAsAccessorInliningEnabled();
-  }
 
   // This is the bottleneck for computing and setting poisoning level in the
   // optimizing compiler.
@@ -1301,9 +1298,6 @@ struct InliningPhase {
             : MaybeHandle<JSFunction>());
     JSNativeContextSpecialization::Flags flags =
         JSNativeContextSpecialization::kNoFlags;
-    if (data->info()->is_accessor_inlining_enabled()) {
-      flags |= JSNativeContextSpecialization::kAccessorInliningEnabled;
-    }
     if (data->info()->is_bailout_on_uninitialized()) {
       flags |= JSNativeContextSpecialization::kBailoutOnUninitialized;
     }

src/flags/flag-definitions.h

@@ -484,7 +484,6 @@ DEFINE_BOOL(trace_generalization, false, "trace map generalization")
 DEFINE_BOOL(turboprop, false,
             "enable experimental turboprop mid-tier compiler.")
 DEFINE_NEG_IMPLICATION(turboprop, turbo_inlining)
-DEFINE_NEG_IMPLICATION(turboprop, inline_accessors)
 DEFINE_VALUE_IMPLICATION(turboprop, interrupt_budget, 10 * KB)
 
 // Flags for concurrent recompilation.
@@ -597,7 +596,6 @@ DEFINE_VALUE_IMPLICATION(stress_inline, max_inlined_bytecode_size_absolute,
 DEFINE_VALUE_IMPLICATION(stress_inline, min_inlining_frequency, 0)
 DEFINE_IMPLICATION(stress_inline, polymorphic_inlining)
 DEFINE_BOOL(trace_turbo_inlining, false, "trace TurboFan inlining")
-DEFINE_BOOL(inline_accessors, true, "inline JavaScript accessors")
 DEFINE_BOOL(turbo_inline_array_builtins, true,
             "inline array builtins in TurboFan code")
 DEFINE_BOOL(use_osr, true, "use on-stack replacement")

test/cctest/compiler/serializer-tester.cc

@@ -39,7 +39,6 @@ SerializerTester::SerializerTester(const char* source)
       *v8::Local<v8::Function>::Cast(CompileRun(function_string.c_str()))));
   uint32_t flags = i::OptimizedCompilationInfo::kInliningEnabled |
                    i::OptimizedCompilationInfo::kFunctionContextSpecializing |
-                   i::OptimizedCompilationInfo::kAccessorInliningEnabled |
                    i::OptimizedCompilationInfo::kLoopPeelingEnabled |
                    i::OptimizedCompilationInfo::kBailoutOnUninitialized |
                    i::OptimizedCompilationInfo::kAllocationFoldingEnabled |

test/mjsunit/compiler/inline-accessors2.js

@@ -25,7 +25,7 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-// Flags: --allow-natives-syntax --inline-accessors
+// Flags: --allow-natives-syntax
 
 var accessorCallCount, setterArgument, setterValue, obj, forceDeopt;
 

test/mjsunit/regress/regress-crbug-134609.js

@@ -25,7 +25,7 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-// Flags: --allow-natives-syntax --inline-accessors
+// Flags: --allow-natives-syntax
 
 var forceDeopt = {x: 0};