[turbofan] Introduce an ExternalPointer type.

test/unittests/compiler/js-typed-lowering-unittest.cc

Index: test/unittests/compiler/js-typed-lowering-unittest.cc
diff --git a/test/unittests/compiler/js-typed-lowering-unittest.cc b/test/unittests/compiler/js-typed-lowering-unittest.cc
index 0b9935081bd99f87b2530130d572fc297453aa35..ba1b719ff57cc77020118193e2b8130c5a4c251b 100644
--- a/test/unittests/compiler/js-typed-lowering-unittest.cc
+++ b/test/unittests/compiler/js-typed-lowering-unittest.cc
@@ -70,11 +70,6 @@ class JSTypedLoweringTest : public TypedGraphTest {
     return buffer;
   }
 
-  Matcher<Node*> IsIntPtrConstant(intptr_t value) {
-    return sizeof(value) == 4 ? IsInt32Constant(static_cast<int32_t>(value))
-                              : IsInt64Constant(static_cast<int64_t>(value));
-  }
-
   JSOperatorBuilder* javascript() { return &javascript_; }
 
  private:
@@ -569,7 +564,7 @@ TEST_F(JSTypedLoweringTest, JSLoadPropertyFromExternalTypedArray) {
     EXPECT_THAT(
         r.replacement(),
         IsLoadBuffer(BufferAccess(type),
-                     IsIntPtrConstant(bit_cast<intptr_t>(&backing_store[0])),
+                     IsPointerConstant(bit_cast<intptr_t>(&backing_store[0])),
                      offset_matcher,
                      IsNumberConstant(array->byte_length()->Number()), effect,
                      control));
@@ -605,7 +600,7 @@ TEST_F(JSTypedLoweringTest, JSLoadPropertyFromExternalTypedArrayWithSafeKey) {
     EXPECT_THAT(
         r.replacement(),
         IsLoadElement(access,
-                      IsIntPtrConstant(bit_cast<intptr_t>(&backing_store[0])),
+                      IsPointerConstant(bit_cast<intptr_t>(&backing_store[0])),
                       key, effect, control));
   }
 }
@@ -650,11 +645,11 @@ TEST_F(JSTypedLoweringTest, JSStorePropertyToExternalTypedArray) {
       ASSERT_TRUE(r.Changed());
       EXPECT_THAT(
           r.replacement(),
-          IsStoreBuffer(BufferAccess(type),
-                        IsIntPtrConstant(bit_cast<intptr_t>(&backing_store[0])),
-                        offset_matcher,
-                        IsNumberConstant(array->byte_length()->Number()), value,
-                        effect, control));
+          IsStoreBuffer(
+              BufferAccess(type),
+              IsPointerConstant(bit_cast<intptr_t>(&backing_store[0])),
+              offset_matcher, IsNumberConstant(array->byte_length()->Number()),
+              value, effect, control));
     }
   }
 }
@@ -703,11 +698,11 @@ TEST_F(JSTypedLoweringTest, JSStorePropertyToExternalTypedArrayWithConversion) {
       ASSERT_TRUE(r.Changed());
       EXPECT_THAT(
           r.replacement(),
-          IsStoreBuffer(BufferAccess(type),
-                        IsIntPtrConstant(bit_cast<intptr_t>(&backing_store[0])),
-                        offset_matcher,
-                        IsNumberConstant(array->byte_length()->Number()),
-                        value_matcher, effect_matcher, control_matcher));
+          IsStoreBuffer(
+              BufferAccess(type),
+              IsPointerConstant(bit_cast<intptr_t>(&backing_store[0])),
+              offset_matcher, IsNumberConstant(array->byte_length()->Number()),
+              value_matcher, effect_matcher, control_matcher));
     }
   }
 }
@@ -744,7 +739,7 @@ TEST_F(JSTypedLoweringTest, JSStorePropertyToExternalTypedArrayWithSafeKey) {
       EXPECT_THAT(
           r.replacement(),
           IsStoreElement(
-              access, IsIntPtrConstant(bit_cast<intptr_t>(&backing_store[0])),
+              access, IsPointerConstant(bit_cast<intptr_t>(&backing_store[0])),
               key, value, effect, control));
     }
   }