T0b1/wasmtime
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Switch default to new x86_64 backend.

Browse Source 
This PR switches the default backend on x86, for both the
`cranelift-codegen` crate and for Wasmtime, to the new
(`MachInst`-style, `VCode`-based) backend that has been under
development and testing for some time now.

The old backend is still available by default in builds with the
`old-x86-backend` feature, or by requesting `BackendVariant::Legacy`
from the appropriate APIs.

As part of that switch, it adds some more runtime-configurable plumbing
to the testing infrastructure so that tests can be run using the
appropriate backend. `clif-util test` is now capable of parsing a
backend selector option from filetests and instantiating the correct
backend.

CI has been updated so that the old x86 backend continues to run its
tests, just as we used to run the new x64 backend separately.

At some point, we will remove the old x86 backend entirely, once we are
satisfied that the new backend has not caused any unforeseen issues and
we do not need to revert.
This commit is contained in:
Chris Fallin
2021-03-09 23:43:11 -08:00
parent b7b47e380d
commit cb48ea406e
243 changed files with 316 additions and 442 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
cranelift/filetests/filetests/wasm/multi-val-b1.clif
View File

@@ -1,5 +1,5 @@
test compile
target x86_64 haswell
target x86_64 legacy haswell
;; `b1` return values need to be legalized into bytes so that they can be stored
;; in memory.

2
cranelift/filetests/filetests/wasm/multi-val-call-indirect.clif
View File

@@ -1,5 +1,5 @@
test legalizer
target x86_64 haswell
target x86_64 legacy haswell
;; Indirect calls with many returns.

2
cranelift/filetests/filetests/wasm/multi-val-call-legalize-args.clif
View File

@@ -1,5 +1,5 @@
test legalizer
target x86_64 haswell
target x86_64 legacy haswell
;; Test if arguments are legalized if function uses sret

2
cranelift/filetests/filetests/wasm/multi-val-reuse-ret-ptr-stack-slot.clif
View File

@@ -1,5 +1,5 @@
test legalizer
target x86_64 haswell
target x86_64 legacy haswell
;; Test that we don't reuse `sret` stack slots for multiple calls. We could do
;; this one day, but it would require some care to ensure that we don't have

2
cranelift/filetests/filetests/wasm/multi-val-sret-slot-alignment.clif
View File

@@ -1,5 +1,5 @@
test legalizer
target x86_64 haswell
target x86_64 legacy haswell
;; Need to insert padding after the `i8`s so that the `i32` and `i64` are
;; aligned.