[turbofan] Kill type Guard nodes during effect/control linearization.

src/compiler/effect-control-linearizer.cc

Index: src/compiler/effect-control-linearizer.cc
diff --git a/src/compiler/effect-control-linearizer.cc b/src/compiler/effect-control-linearizer.cc
index dabf52dce4d88cf3eaba9867e753634d3fdda6c3..1f751d8af03a1655acf0a78db4452358a42166e9 100644
--- a/src/compiler/effect-control-linearizer.cc
+++ b/src/compiler/effect-control-linearizer.cc
@@ -342,6 +342,9 @@ bool EffectControlLinearizer::TryWireInStateEffect(Node* node, Node** effect,
                                                    Node** control) {
   ValueEffectControl state(nullptr, nullptr, nullptr);
   switch (node->opcode()) {
+    case IrOpcode::kGuard:
+      state = LowerGuard(node, *effect, *control);
+      break;
     case IrOpcode::kChangeBitToTagged:
       state = LowerChangeBitToTagged(node, *effect, *control);
       break;
@@ -402,6 +405,12 @@ bool EffectControlLinearizer::TryWireInStateEffect(Node* node, Node** effect,
   return true;
 }
 
+EffectControlLinearizer::ValueEffectControl EffectControlLinearizer::LowerGuard(
+    Node* node, Node* effect, Node* control) {
+  Node* value = node->InputAt(0);
+  return ValueEffectControl(value, effect, control);
+}
+
 EffectControlLinearizer::ValueEffectControl
 EffectControlLinearizer::LowerChangeFloat64ToTagged(Node* node, Node* effect,
                                                     Node* control) {