[turbofan] Add initial support for SOFT deopts.

src/compiler/js-intrinsic-lowering.cc

Index: src/compiler/js-intrinsic-lowering.cc
diff --git a/src/compiler/js-intrinsic-lowering.cc b/src/compiler/js-intrinsic-lowering.cc
index 4e80d79869b5a336dd618d121cfa18a1e3b68597..bba3749532f96a14041e2ecc3b217cef82b82ed3 100644
--- a/src/compiler/js-intrinsic-lowering.cc
+++ b/src/compiler/js-intrinsic-lowering.cc
@@ -149,7 +149,8 @@ Reduction JSIntrinsicLowering::ReduceDeoptimizeNow(Node* node) {
 
   // TODO(bmeurer): Move MergeControlToEnd() to the AdvancedReducer.
   Node* deoptimize =
-      graph()->NewNode(common()->Deoptimize(), frame_state, effect, control);
+      graph()->NewNode(common()->Deoptimize(DeoptimizeKind::kEager),
+                       frame_state, effect, control);
   NodeProperties::MergeControlToEnd(graph(), common(), deoptimize);
 
   node->TrimInputCount(0);
@@ -466,7 +467,8 @@ Reduction JSIntrinsicLowering::ReduceThrowNotDateError(Node* node) {
 
   // TODO(bmeurer): Move MergeControlToEnd() to the AdvancedReducer.
   Node* deoptimize =
-      graph()->NewNode(common()->Deoptimize(), frame_state, effect, control);
+      graph()->NewNode(common()->Deoptimize(DeoptimizeKind::kEager),
+                       frame_state, effect, control);
   NodeProperties::MergeControlToEnd(graph(), common(), deoptimize);
 
   node->TrimInputCount(0);