[turbofan] ToNumeric(x) does ToNumber(x) for all non-BigInt primitives.

We can safely lower ToNumeric(x) to ToNumber(x) as long as we can
guarantee that x is any primitive except BigInt (as ToNumeric would
return that unchanged while ToNumber will throw).

Bug: v8:8015
Change-Id: I66573cc204c7c919095ca7598a027fabef7d71a8
Reviewed-on: https://chromium-review.googlesource.com/1199665Reviewed-by: Maya Lekova <mslekova@chromium.org>
Commit-Queue: Benedikt Meurer <bmeurer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#55556}

src/compiler/js-typed-lowering.cc

@@ -1026,8 +1026,8 @@ Reduction JSTypedLowering::ReduceJSToNumber(Node* node) {
 Reduction JSTypedLowering::ReduceJSToNumeric(Node* node) {
   Node* const input = NodeProperties::GetValueInput(node, 0);
   Type const input_type = NodeProperties::GetType(input);
-  if (input_type.Is(Type::Number())) {
-    // ToNumeric(x:number) => ToNumber(x)
+  if (input_type.Is(Type::NonBigIntPrimitive())) {
+    // ToNumeric(x:primitive\bigint) => ToNumber(x)
     NodeProperties::ChangeOp(node, javascript()->ToNumber());
     Reduction const reduction = ReduceJSToNumber(node);
     return reduction.Changed() ? reduction : Changed(node);

src/compiler/types.h

@@ -169,7 +169,8 @@ namespace compiler {
                                   kNumber | kNullOrUndefined | kBoolean) \
   V(PlainPrimitive,               kNumber | kString | kBoolean | \
                                   kNullOrUndefined) \
-  V(Primitive,                    kSymbol | kBigInt | kPlainPrimitive) \
+  V(NonBigIntPrimitive,           kSymbol | kPlainPrimitive) \
+  V(Primitive,                    kBigInt | kNonBigIntPrimitive) \
   V(OtherUndetectableOrUndefined, kOtherUndetectable | kUndefined) \
   V(Proxy,                        kCallableProxy | kOtherProxy) \
   V(ArrayOrOtherObject,           kArray | kOtherObject) \