[vm/compiler] Move type argument type checks out of closure bodies.

These checks are now performed in the dynamic closure call dispatcher.
To avoid having to create type argument vectors (TAVs) for default type
arguments at runtime, we cache a compile-time created TAV in the
ClosureData for the closure function which is retrieved by the
dispatcher when needed.

We also keep an associated packed field of information that can also be
determined at compile time:

* Whether the cached TAV needs instantiation or can share its
  instantiator or function type arguments.

* The number of parent type parameters.

The former allows the generated IL to keep the invariant that the
InstantiateTypeArguments instruction (and the runtime entry it calls) is
only used for uninstantiated TAVs.

Also changes the destination name to an Value input for the
AssertSubtype instruction and adds handling for non-constant types and
names in that instruction's backend.

Additional changes:

* Adds new slots for ClosureData, Function, and TypeArguments.

* Adds a new kUnboxedUint8 representation (needed for
  TypeParameterLayout::flags_, which is of type uint8_t).

  * Extends LoadField to handle uint8_t unboxed native fields.

  * Adds BoxUint8 for boxing unboxed uint8_t values.

Code size impact on Flutter gallery in release mode:

* arm7: total +0.08%, vmisolate: +0.56%, isolate: +0.42%,
        readonly: -0.04%, instructions: -0.03%

* arm8: total +0.12%, vmisolate: +0.56%, isolate: +0.42%,
        readonly: -0.002%, instructions: +0.03%

Cq-Include-Trybots: luci.dart.try:vm-kernel-linux-debug-ia32-try,vm-kernel-linux-debug-x64-try,vm-kernel-nnbd-linux-debug-ia32-try,vm-kernel-nnbd-linux-debug-x64-try,vm-kernel-precomp-linux-debug-simarm_x64-try,vm-kernel-precomp-linux-debug-x64-try,vm-kernel-precomp-nnbd-linux-debug-simarm_x64-try,vm-kernel-precomp-nnbd-linux-debug-x64-try,vm-kernel-linux-release-simarm-try,vm-kernel-linux-release-simarm64-try,vm-kernel-nnbd-linux-release-simarm-try,vm-kernel-nnbd-linux-release-simarm64-try,vm-kernel-precomp-linux-release-simarm-try,vm-kernel-precomp-linux-release-simarm64-try,vm-kernel-precomp-nnbd-linux-release-simarm64-try
Bug: dart-lang#40813
Change-Id: I5a7de27a17e3119e27752bd0d10e1c6bc1b52a16
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/158844
Commit-Queue: Tess Strickland <[email protected]>
Reviewed-by: Martin Kustermann <[email protected]>
Reviewed-by: Régis Crelier <[email protected]>

Author: sstrickl

assembler_arm.cc

@@ -2207,6 +2207,7 @@ OperandSize Address::OperandSizeFor(intptr_t cid) {
   switch (cid) {
     case kArrayCid:
     case kImmutableArrayCid:
+    case kTypeArgumentsCid:
       return kWord;
     case kOneByteStringCid:
     case kExternalOneByteStringCid:

assembler_arm64.h

@@ -266,6 +266,7 @@ class Address : public ValueObject {
     switch (cid) {
       case kArrayCid:
       case kImmutableArrayCid:
+      case kTypeArgumentsCid:
         return kWord;
       case kOneByteStringCid:
       case kExternalOneByteStringCid: