deps: V8: cherry-pick ac0fe8ec from upstream

Original commit message:
  [interpreter] Remove TryInstallOptimizedCode

  Removes the interrupt check and runtime call to TryInstallOptimizedCode
  from the optimization marker checks (i.e. CompileLazy and
  InterpreterEntryTrampoline). Instead, we rely on the other interrupt
  sources (in particular stack checks at function entries and loop
  headers) to install optimized code for us.

  This will hopefully not cause regressions, as we have plenty of other
  interrupt checks, but it may delay optimized code execution for
  some function by one function call.

  Bug:  v8:6933
  Change-Id: Ieadfff7ae2078d2a84085294158ad9a706eb9c64
  Reviewed-on: https://chromium-review.googlesource.com/723475
  Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
  Commit-Queue: Leszek Swirski <leszeks@chromium.org>
  Cr-Commit-Position: refs/heads/master@{#48667}

Ref: https://bugs.chromium.org/p/v8/issues/detail?id=6933
Ref: v8/v8@ac0fe8e
PR-URL: #17695
Backport-PR-URL: #16413
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: James M Snell <jasnell@gmail.com>

deps/v8/include/v8-version.h

@@ -11,7 +11,7 @@
 #define V8_MAJOR_VERSION 6
 #define V8_MINOR_VERSION 2
 #define V8_BUILD_NUMBER 414
-#define V8_PATCH_LEVEL 47
+#define V8_PATCH_LEVEL 48
 
 // Use 1 for candidates and 0 otherwise.
 // (Boolean macro values are not supported by all preprocessors.)

deps/v8/src/builtins/arm/builtins-arm.cc

@@ -1073,22 +1073,15 @@ static void MaybeTailCallOptimizedCodeSlot(MacroAssembler* masm,
         Runtime::kCompileOptimized_Concurrent);
 
     {
-      // Otherwise, the marker is InOptimizationQueue.
+      // Otherwise, the marker is InOptimizationQueue, so fall through hoping
+      // that an interrupt will eventually update the slot with optimized code.
       if (FLAG_debug_code) {
         __ cmp(
             optimized_code_entry,
             Operand(Smi::FromEnum(OptimizationMarker::kInOptimizationQueue)));
         __ Assert(eq, kExpectedOptimizationSentinel);
       }
-      // Checking whether the queued function is ready for install is
-      // optional, since we come across interrupts and stack checks elsewhere.
-      // However, not checking may delay installing ready functions, and
-      // always checking would be quite expensive.  A good compromise is to
-      // first check against stack limit as a cue for an interrupt signal.
-      __ LoadRoot(scratch2, Heap::kStackLimitRootIndex);
-      __ cmp(sp, Operand(scratch2));
-      __ b(hs, &fallthrough);
-      GenerateTailCallToReturnedCode(masm, Runtime::kTryInstallOptimizedCode);
+      __ jmp(&fallthrough);
     }
   }
 

deps/v8/src/builtins/arm64/builtins-arm64.cc

@@ -1084,22 +1084,15 @@ static void MaybeTailCallOptimizedCodeSlot(MacroAssembler* masm,
         Runtime::kCompileOptimized_Concurrent);
 
     {
-      // Otherwise, the marker is InOptimizationQueue.
+      // Otherwise, the marker is InOptimizationQueue, so fall through hoping
+      // that an interrupt will eventually update the slot with optimized code.
       if (FLAG_debug_code) {
         __ Cmp(
             optimized_code_entry,
             Operand(Smi::FromEnum(OptimizationMarker::kInOptimizationQueue)));
         __ Assert(eq, kExpectedOptimizationSentinel);
       }
-
-      // Checking whether the queued function is ready for install is optional,
-      // since we come across interrupts and stack checks elsewhere.  However,
-      // not checking may delay installing ready functions, and always checking
-      // would be quite expensive.  A good compromise is to first check against
-      // stack limit as a cue for an interrupt signal.
-      __ CompareRoot(masm->StackPointer(), Heap::kStackLimitRootIndex);
-      __ B(hs, &fallthrough);
-      GenerateTailCallToReturnedCode(masm, Runtime::kTryInstallOptimizedCode);
+      __ B(&fallthrough);
     }
   }
 

deps/v8/src/builtins/ia32/builtins-ia32.cc

@@ -715,24 +715,15 @@ static void MaybeTailCallOptimizedCodeSlot(MacroAssembler* masm,
         Runtime::kCompileOptimized_Concurrent);
 
     {
-      // Otherwise, the marker is InOptimizationQueue.
+      // Otherwise, the marker is InOptimizationQueue, so fall through hoping
+      // that an interrupt will eventually update the slot with optimized code.
       if (FLAG_debug_code) {
         __ cmp(
             optimized_code_entry,
             Immediate(Smi::FromEnum(OptimizationMarker::kInOptimizationQueue)));
         __ Assert(equal, kExpectedOptimizationSentinel);
       }
-
-      // Checking whether the queued function is ready for install is optional,
-      // since we come across interrupts and stack checks elsewhere.  However,
-      // not checking may delay installing ready functions, and always checking
-      // would be quite expensive.  A good compromise is to first check against
-      // stack limit as a cue for an interrupt signal.
-      ExternalReference stack_limit =
-          ExternalReference::address_of_stack_limit(masm->isolate());
-      __ cmp(esp, Operand::StaticVariable(stack_limit));
-      __ j(above_equal, &fallthrough);
-      GenerateTailCallToReturnedCode(masm, Runtime::kTryInstallOptimizedCode);
+      __ jmp(&fallthrough);
     }
   }
 

deps/v8/src/builtins/mips/builtins-mips.cc

@@ -1052,21 +1052,14 @@ static void MaybeTailCallOptimizedCodeSlot(MacroAssembler* masm,
         Runtime::kCompileOptimized_Concurrent);
 
     {
-      // Otherwise, the marker is InOptimizationQueue.
+      // Otherwise, the marker is InOptimizationQueue, so fall through hoping
+      // that an interrupt will eventually update the slot with optimized code.
       if (FLAG_debug_code) {
         __ Assert(
             eq, kExpectedOptimizationSentinel, optimized_code_entry,
             Operand(Smi::FromEnum(OptimizationMarker::kInOptimizationQueue)));
       }
-
-      // Checking whether the queued function is ready for install is optional,
-      // since we come across interrupts and stack checks elsewhere. However,
-      // not checking may delay installing ready functions, and always checking
-      // would be quite expensive.  A good compromise is to first check against
-      // stack limit as a cue for an interrupt signal.
-      __ LoadRoot(at, Heap::kStackLimitRootIndex);
-      __ Branch(&fallthrough, hs, sp, Operand(at));
-      GenerateTailCallToReturnedCode(masm, Runtime::kTryInstallOptimizedCode);
+      __ jmp(&fallthrough);
     }
   }
 

deps/v8/src/builtins/mips64/builtins-mips64.cc

@@ -1054,21 +1054,14 @@ static void MaybeTailCallOptimizedCodeSlot(MacroAssembler* masm,
         Runtime::kCompileOptimized_Concurrent);
 
     {
-      // Otherwise, the marker is InOptimizationQueue.
+      // Otherwise, the marker is InOptimizationQueue, so fall through hoping
+      // that an interrupt will eventually update the slot with optimized code.
       if (FLAG_debug_code) {
         __ Assert(
             eq, kExpectedOptimizationSentinel, optimized_code_entry,
             Operand(Smi::FromEnum(OptimizationMarker::kInOptimizationQueue)));
       }
-
-      // Checking whether the queued function is ready for install is optional,
-      // since we come across interrupts and stack checks elsewhere. However,
-      // not checking may delay installing ready functions, and always checking
-      // would be quite expensive.  A good compromise is to first check against
-      // stack limit as a cue for an interrupt signal.
-      __ LoadRoot(t0, Heap::kStackLimitRootIndex);
-      __ Branch(&fallthrough, hs, sp, Operand(t0));
-      GenerateTailCallToReturnedCode(masm, Runtime::kTryInstallOptimizedCode);
+      __ jmp(&fallthrough);
     }
   }
 

deps/v8/src/builtins/ppc/builtins-ppc.cc

@@ -1081,23 +1081,15 @@ static void MaybeTailCallOptimizedCodeSlot(MacroAssembler* masm,
         Runtime::kCompileOptimized_Concurrent);
 
     {
-      // Otherwise, the marker is InOptimizationQueue.
+      // Otherwise, the marker is InOptimizationQueue, so fall through hoping
+      // that an interrupt will eventually update the slot with optimized code.
       if (FLAG_debug_code) {
         __ CmpSmiLiteral(
             optimized_code_entry,
             Smi::FromEnum(OptimizationMarker::kInOptimizationQueue), r0);
         __ Assert(eq, kExpectedOptimizationSentinel);
       }
-
-      // Checking whether the queued function is ready for install is optional,
-      // since we come across interrupts and stack checks elsewhere.  However,
-      // not checking may delay installing ready functions, and always checking
-      // would be quite expensive.  A good compromise is to first check against
-      // stack limit as a cue for an interrupt signal.
-      __ LoadRoot(ip, Heap::kStackLimitRootIndex);
-      __ cmpl(sp, ip);
-      __ bge(&fallthrough);
-      GenerateTailCallToReturnedCode(masm, Runtime::kTryInstallOptimizedCode);
+      __ b(&fallthrough);
     }
   }
 

deps/v8/src/builtins/s390/builtins-s390.cc

@@ -1081,22 +1081,15 @@ static void MaybeTailCallOptimizedCodeSlot(MacroAssembler* masm,
         Runtime::kCompileOptimized_Concurrent);
 
     {
-      // Otherwise, the marker is InOptimizationQueue.
+      // Otherwise, the marker is InOptimizationQueue, so fall through hoping
+      // that an interrupt will eventually update the slot with optimized code.
       if (FLAG_debug_code) {
         __ CmpSmiLiteral(
             optimized_code_entry,
             Smi::FromEnum(OptimizationMarker::kInOptimizationQueue), r0);
         __ Assert(eq, kExpectedOptimizationSentinel);
       }
-
-      // Checking whether the queued function is ready for install is optional,
-      // since we come across interrupts and stack checks elsewhere.  However,
-      // not checking may delay installing ready functions, and always checking
-      // would be quite expensive.  A good compromise is to first check against
-      // stack limit as a cue for an interrupt signal.
-      __ CmpLogicalP(sp, RootMemOperand(Heap::kStackLimitRootIndex));
-      __ bge(&fallthrough, Label::kNear);
-      GenerateTailCallToReturnedCode(masm, Runtime::kTryInstallOptimizedCode);
+      __ b(&fallthrough, Label::kNear);
     }
   }
 

deps/v8/src/builtins/x64/builtins-x64.cc

@@ -798,21 +798,14 @@ static void MaybeTailCallOptimizedCodeSlot(MacroAssembler* masm,
         Runtime::kCompileOptimized_Concurrent);
 
     {
-      // Otherwise, the marker is InOptimizationQueue.
+      // Otherwise, the marker is InOptimizationQueue, so fall through hoping
+      // that an interrupt will eventually update the slot with optimized code.
       if (FLAG_debug_code) {
         __ SmiCompare(optimized_code_entry,
                       Smi::FromEnum(OptimizationMarker::kInOptimizationQueue));
         __ Assert(equal, kExpectedOptimizationSentinel);
       }
-
-      // Checking whether the queued function is ready for install is optional,
-      // since we come across interrupts and stack checks elsewhere.  However,
-      // not checking may delay installing ready functions, and always checking
-      // would be quite expensive.  A good compromise is to first check against
-      // stack limit as a cue for an interrupt signal.
-      __ CompareRoot(rsp, Heap::kStackLimitRootIndex);
-      __ j(above_equal, &fallthrough);
-      GenerateTailCallToReturnedCode(masm, Runtime::kTryInstallOptimizedCode);
+      __ jmp(&fallthrough);
     }
   }
 

deps/v8/src/runtime/runtime-compiler.cc

@@ -340,27 +340,6 @@ RUNTIME_FUNCTION(Runtime_CompileForOnStackReplacement) {
   return NULL;
 }
 
-
-RUNTIME_FUNCTION(Runtime_TryInstallOptimizedCode) {
-  HandleScope scope(isolate);
-  DCHECK_EQ(1, args.length());
-  CONVERT_ARG_HANDLE_CHECKED(JSFunction, function, 0);
-
-  // First check if this is a real stack overflow.
-  StackLimitCheck check(isolate);
-  if (check.JsHasOverflowed(kStackSpaceRequiredForCompilation * KB)) {
-    return isolate->StackOverflow();
-  }
-
-  // Only try to install optimized functions if the interrupt was InstallCode.
-  if (isolate->stack_guard()->CheckAndClearInstallCode()) {
-    isolate->optimizing_compile_dispatcher()->InstallOptimizedFunctions();
-  }
-
-  return (function->IsOptimized()) ? function->code()
-                                   : function->shared()->code();
-}
-
 static Object* CompileGlobalEval(Isolate* isolate, Handle<String> source,
                                  Handle<SharedFunctionInfo> outer_info,
                                  LanguageMode language_mode,

deps/v8/src/runtime/runtime.h

@@ -115,7 +115,6 @@ namespace internal {
   F(NotifyStubFailure, 0, 1)              \
   F(NotifyDeoptimized, 1, 1)              \
   F(CompileForOnStackReplacement, 1, 1)   \
-  F(TryInstallOptimizedCode, 1, 1)        \
   F(ResolvePossiblyDirectEval, 6, 1)      \
   F(InstantiateAsmJs, 4, 1)