[regexp] Remove IsRegExp intrinsic

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

Index: test/unittests/compiler/js-intrinsic-lowering-unittest.cc
diff --git a/test/unittests/compiler/js-intrinsic-lowering-unittest.cc b/test/unittests/compiler/js-intrinsic-lowering-unittest.cc
index 780bf65df31c44d1912a80a75607dbb48a88200f..e8bbc335783c6e3a2b5cdabe76685aee6c6999f9 100644
--- a/test/unittests/compiler/js-intrinsic-lowering-unittest.cc
+++ b/test/unittests/compiler/js-intrinsic-lowering-unittest.cc
@@ -129,37 +129,6 @@ TEST_F(JSIntrinsicLoweringTest, InlineIsTypedArray) {
 
 
 // -----------------------------------------------------------------------------
-// %_IsRegExp
-
-
-TEST_F(JSIntrinsicLoweringTest, InlineIsRegExp) {
-  Node* const input = Parameter(0);
-  Node* const context = Parameter(1);
-  Node* const effect = graph()->start();
-  Node* const control = graph()->start();
-  Reduction const r = Reduce(
-      graph()->NewNode(javascript()->CallRuntime(Runtime::kInlineIsRegExp, 1),
-                       input, context, effect, control));
-  ASSERT_TRUE(r.Changed());
-
-  Node* phi = r.replacement();
-  Capture<Node*> branch, if_false;
-  EXPECT_THAT(
-      phi,
-      IsPhi(
-          MachineRepresentation::kTagged, IsFalseConstant(),
-          IsNumberEqual(IsLoadField(AccessBuilder::ForMapInstanceType(),
-                                    IsLoadField(AccessBuilder::ForMap(), input,
-                                                effect, CaptureEq(&if_false)),
-                                    effect, _),
-                        IsNumberConstant(JS_REGEXP_TYPE)),
-          IsMerge(IsIfTrue(AllOf(CaptureEq(&branch),
-                                 IsBranch(IsObjectIsSmi(input), control))),
-                  AllOf(CaptureEq(&if_false), IsIfFalse(CaptureEq(&branch))))));
-}
-
-
-// -----------------------------------------------------------------------------
 // %_IsJSReceiver