tree ccb074d1df41728c824cc1bfc6084ec84484909d
parent e93d62cfbfd49db734fb6e3ead651dc4c1e31f85
author Daco Harkes <dacoharkes@google.com> 1653944283 +0000
committer Commit Bot <commit-bot@chromium.org> 1653944283 +0000

[vm/ffi] Introduce `CCallInstr` and replace handle instructions

The CCallInstr takes unboxed word-sized integers and does a call to C
without any VM transitions.

This can be used for the following.
1) Leaf runtime entries. This CL removes the EnterHandleScope,
   ExitHandleScope, and AllocateHandle instructions.
2) Compilation of isolate independent code where all definitions in IL
   are unboxed integers.

Currently, the CCallInstr expects all it's arguments and the return type
to be word-sized.

This CL also:
- Adds loadImmediate and CCall with a register for each assembler.
- Adds a CSE pass to force-optimized so that LoadThreadInstr gets de-
  duplicated.

TEST=tests/ffi(_2)/*

Change-Id: I67c6aaa1b7d6aa7d60e274477686a54e5a331216
Cq-Include-Trybots: luci.dart.try:vm-kernel-linux-debug-simriscv64-try,vm-kernel-precomp-linux-debug-simriscv64-try,vm-kernel-nnbd-mac-debug-arm64-try,vm-kernel-nnbd-mac-debug-x64-try,vm-kernel-win-debug-ia32-try,vm-kernel-win-debug-x64-try
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/246240
Reviewed-by: Martin Kustermann <kustermann@google.com>
Commit-Queue: Daco Harkes <dacoharkes@google.com>
Reviewed-by: Ryan Macnak <rmacnak@google.com>