Again reland "Refine expression typing, esp. by propagating range information."

test/cctest/test-types.cc

 // Copyright 2013 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 <vector>
 
 #include "src/hydrogen-types.h"
 #include "src/isolate-inl.h"
 #include "src/types.h"
 #include "test/cctest/cctest.h"
@@ skipping 79 matching lines @@
 };
 
 
 template<class Type, class TypeHandle, class Region>
 class Types {
  public:
   Types(Region* region, Isolate* isolate)
       : region_(region), rng_(isolate->random_number_generator()) {
     #define DECLARE_TYPE(name, value) \
       name = Type::name(region); \
-      types.push_back(name);
+      if (SmiValuesAre31Bits() || \
+          (!Type::name(region)->Equals(Type::OtherSigned32()) && \
+           !Type::name(region)->Equals(Type::OtherUnsigned31()))) { \
+        /* Hack: Avoid generating those empty bitset types. */ \
+        types.push_back(name); \
+      }
     PROPER_BITSET_TYPE_LIST(DECLARE_TYPE)
     #undef DECLARE_TYPE
 
     object_map = isolate->factory()->NewMap(
         JS_OBJECT_TYPE, JSObject::kHeaderSize);
     array_map = isolate->factory()->NewMap(
         JS_ARRAY_TYPE, JSArray::kSize);
     number_map = isolate->factory()->NewMap(
         HEAP_NUMBER_TYPE, HeapNumber::kSize);
     uninitialized_map = isolate->factory()->uninitialized_map();
@@ skipping 166 matching lines @@
       case 0: {  // bitset
         #define COUNT_BITSET_TYPES(type, value) + 1
         int n = 0 PROPER_BITSET_TYPE_LIST(COUNT_BITSET_TYPES);
         #undef COUNT_BITSET_TYPES
         // Pick a bunch of named bitsets and return their intersection.
         TypeHandle result = Type::Any(region_);
         for (int i = 0, m = 1 + rng_->NextInt(3); i < m; ++i) {
           int j = rng_->NextInt(n);
           #define PICK_BITSET_TYPE(type, value) \
             if (j-- == 0) { \
+              if (!SmiValuesAre31Bits() && \
+                  (Type::type(region_)->Equals(Type::OtherSigned32()) || \
+                   Type::type(region_)->Equals(Type::OtherUnsigned31()))) { \
+                /* Hack: Avoid generating those empty bitset types. */ \
+                continue; \
+              } \
               TypeHandle tmp = Type::Intersect( \
                   result, Type::type(region_), region_); \
               if (tmp->Is(Type::None()) && i != 0) { \
                 break; \
-              } { \
+              } else { \
                 result = tmp; \
                 continue; \
               } \
             }
           PROPER_BITSET_TYPE_LIST(PICK_BITSET_TYPE)
           #undef PICK_BITSET_TYPE
         }
         return result;
       }
       case 1: {  // class
@@ skipping 1870 matching lines @@
 }
 
 
 TEST(NowOf) {
   CcTest::InitializeVM();
   ZoneTests().NowOf();
   HeapTests().NowOf();
 }
 
 
+TEST(MinMax) {
+  CcTest::InitializeVM();
+  ZoneTests().MinMax();
+  HeapTests().MinMax();
+}
+
+
 TEST(BitsetGlb) {
   CcTest::InitializeVM();
   ZoneTests().BitsetGlb();
   HeapTests().BitsetGlb();
 }
 
 
 TEST(BitsetLub) {
   CcTest::InitializeVM();
   ZoneTests().BitsetLub();
@@ skipping 92 matching lines @@
   ZoneTests().Convert<HeapType, Handle<HeapType>, Isolate, HeapRep>();
   HeapTests().Convert<Type, Type*, Zone, ZoneRep>();
 }
 
 
 TEST(HTypeFromType) {
   CcTest::InitializeVM();
   ZoneTests().HTypeFromType();
   HeapTests().HTypeFromType();
 }