[turbofan] Introduce CheckIf simplified operator.

src/compiler/effect-control-linearizer.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/effect-control-linearizer.h"
 
 #include "src/code-factory.h"
 #include "src/compiler/access-builder.h"
 #include "src/compiler/js-graph.h"
 #include "src/compiler/linkage.h"
@@ skipping 416 matching lines @@
       break;
     case IrOpcode::kTruncateTaggedToFloat64:
       state = LowerTruncateTaggedToFloat64(node, *effect, *control);
       break;
     case IrOpcode::kCheckBounds:
       state = LowerCheckBounds(node, frame_state, *effect, *control);
       break;
     case IrOpcode::kCheckNumber:
       state = LowerCheckNumber(node, frame_state, *effect, *control);
       break;
+    case IrOpcode::kCheckIf:
+      state = LowerCheckIf(node, frame_state, *effect, *control);
+      break;
     case IrOpcode::kCheckTaggedPointer:
       state = LowerCheckTaggedPointer(node, frame_state, *effect, *control);
       break;
     case IrOpcode::kCheckTaggedSigned:
       state = LowerCheckTaggedSigned(node, frame_state, *effect, *control);
       break;
     case IrOpcode::kCheckedInt32Add:
       state = LowerCheckedInt32Add(node, frame_state, *effect, *control);
       break;
     case IrOpcode::kCheckedInt32Sub:
@@ skipping 382 matching lines @@
   control = graph()->NewNode(common()->Merge(2), if_true0, if_false0);
   effect = graph()->NewNode(common()->EffectPhi(2), etrue0, efalse0, control);
 
   // Make sure the lowered node does not appear in any use lists.
   node->TrimInputCount(0);
 
   return ValueEffectControl(value, effect, control);
 }
 
 EffectControlLinearizer::ValueEffectControl
+EffectControlLinearizer::LowerCheckIf(Node* node, Node* frame_state,
+                                      Node* effect, Node* control) {
+  Node* value = node->InputAt(0);
+
+  control = effect = graph()->NewNode(common()->DeoptimizeUnless(), value,
+                                      frame_state, effect, control);
+
+  // Make sure the lowered node does not appear in any use lists.
+  node->TrimInputCount(0);
+
+  return ValueEffectControl(value, effect, control);
+}
+
+EffectControlLinearizer::ValueEffectControl
 EffectControlLinearizer::LowerCheckTaggedPointer(Node* node, Node* frame_state,
                                                  Node* effect, Node* control) {
   Node* value = node->InputAt(0);
 
   Node* check = ObjectIsSmi(value);
   control = effect = graph()->NewNode(common()->DeoptimizeIf(), check,
                                       frame_state, effect, control);
 
   // Make sure the lowered node does not appear in any use lists.
   node->TrimInputCount(0);
@@ skipping 838 matching lines @@
         isolate(), graph()->zone(), callable.descriptor(), 0, flags,
         Operator::kNoThrow);
     to_number_operator_.set(common()->Call(desc));
   }
   return to_number_operator_.get();
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8