[WIP] Start adding JSCallWithVarargs

src/compiler/simplified-lowering.cc

Index: src/compiler/simplified-lowering.cc
diff --git a/src/compiler/simplified-lowering.cc b/src/compiler/simplified-lowering.cc
index 017a730eeaf21d5a0b47cacb00d3572573121e85..67a04388f7c779cae8c36acd8c86bb3679c8b4ea 100644
--- a/src/compiler/simplified-lowering.cc
+++ b/src/compiler/simplified-lowering.cc
@@ -1553,6 +1553,19 @@ class RepresentationSelector {
         }
         return;
       }
+      case IrOpcode::kJSCallVarargs: {
+        CallVarargsParameters p = CallVarargsParametersOf(node->op());
+        int arity = static_cast<int>(p.arity());
+        for (int i = 0; i < arity; ++i) {
+          ProcessInput(node, i, UseInfo::AnyTagged());
+        }
+        // argumentsList and argumentsLength
+        ProcessInput(node, arity + 0, UseInfo::TaggedPointer());
+        ProcessInput(node, arity + 1, UseInfo::TruncatingWord32());
+        ProcessRemainingInputs(node, arity + 2);
+        SetOutput(node, MachineRepresentation::kTagged);
+        return;
+      }
 
       //------------------------------------------------------------------
       // Simplified operators.
@@ -2898,6 +2911,14 @@ class RepresentationSelector {
       case IrOpcode::kJSToObject:
       case IrOpcode::kJSToString:
       case IrOpcode::kJSToPrimitiveToString:
+      case IrOpcode::kJSConstruct:
+      case IrOpcode::kJSConstructForwardVarargs:
+      case IrOpcode::kJSConstructWithSpread:
+      case IrOpcode::kJSCall:
+      case IrOpcode::kJSCallForwardVarargs:
+      case IrOpcode::kJSCallWithArrayLike:
+      case IrOpcode::kJSCallWithSpread:
+      case IrOpcode::kJSCallRuntime:
         VisitInputs(node);
         // Assume the output is tagged.
         return SetOutput(node, MachineRepresentation::kTagged);