[turbofan] Introduce ToBooleanHints on ToBoolean operators.

src/compiler/type-hint-analyzer.cc

 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/compiler/type-hint-analyzer.h"
 
 #include "src/assembler.h"
+#include "src/code-stubs.h"
 #include "src/compiler/type-hints.h"
 #include "src/ic/ic-state.h"
 
 namespace v8 {
 namespace internal {
 namespace compiler {
 
 namespace {
 
 // TODO(bmeurer): This detour via types is ugly.
@@ skipping 16 matching lines @@
   Handle<Code> code = i->second;
   DCHECK_EQ(Code::BINARY_OP_IC, code->kind());
   BinaryOpICState state(code->GetIsolate(), code->extra_ic_state());
   *hints = BinaryOperationHints(ToHint(state.GetLeftType()),
                                 ToHint(state.GetRightType()),
                                 ToHint(state.GetResultType()));
   return true;
 }
 
 
+bool TypeHintAnalysis::GetToBooleanHints(TypeFeedbackId id,
+                                         ToBooleanHints* hints) const {
+  auto i = infos_.find(id);
+  if (i == infos_.end()) return false;
+  Handle<Code> code = i->second;
+  DCHECK_EQ(Code::TO_BOOLEAN_IC, code->kind());
+  ToBooleanStub stub(code->GetIsolate(), code->extra_ic_state());
+// TODO(bmeurer): Replace ToBooleanStub::Types with ToBooleanHints.
+#define ASSERT_COMPATIBLE(NAME, Name)       \
+  STATIC_ASSERT(1 << ToBooleanStub::NAME == \
+                static_cast<int>(ToBooleanHint::k##Name))
+  ASSERT_COMPATIBLE(UNDEFINED, Undefined);
+  ASSERT_COMPATIBLE(BOOLEAN, Boolean);
+  ASSERT_COMPATIBLE(NULL_TYPE, Null);
+  ASSERT_COMPATIBLE(SMI, SmallInteger);
+  ASSERT_COMPATIBLE(SPEC_OBJECT, Receiver);
+  ASSERT_COMPATIBLE(STRING, String);
+  ASSERT_COMPATIBLE(SYMBOL, Symbol);
+  ASSERT_COMPATIBLE(HEAP_NUMBER, HeapNumber);
+  ASSERT_COMPATIBLE(SIMD_VALUE, SimdValue);
+#undef ASSERT_COMPATIBLE
+  *hints = ToBooleanHints(stub.types().ToIntegral());
+  return true;
+}
+
+
 TypeHintAnalysis* TypeHintAnalyzer::Analyze(Handle<Code> code) {
   DisallowHeapAllocation no_gc;
   TypeHintAnalysis::Infos infos(zone());
   Isolate* const isolate = code->GetIsolate();
   int const mask = RelocInfo::ModeMask(RelocInfo::CODE_TARGET_WITH_ID);
   for (RelocIterator it(*code, mask); !it.done(); it.next()) {
     RelocInfo* rinfo = it.rinfo();
     Address target_address = rinfo->target_address();
     Code* target = Code::GetCodeFromTargetAddress(target_address);
     switch (target->kind()) {
-      case Code::BINARY_OP_IC: {
+      case Code::BINARY_OP_IC:
+      case Code::TO_BOOLEAN_IC: {
         // Add this feedback to the {infos}.
         TypeFeedbackId id(static_cast<unsigned>(rinfo->data()));
         infos.insert(std::make_pair(id, handle(target, isolate)));
         break;
       }
-
       default:
         // Ignore the remaining code objects.
         break;
     }
   }
   return new (zone()) TypeHintAnalysis(infos);
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8