05cbd667c7
* Cranelift: use regalloc2 constraints on caller side of ABI code. This PR updates the shared ABI code and backends to use register-operand constraints rather than explicit pinned-vreg moves for register arguments and return values. The s390x backend was not updated, because it has its own implementation of ABI code. Ideally we could converge back to the code shared by x64 and aarch64 (which didn't exist when s390x ported calls to ISLE, so the current situation is underestandable, to be clear!). I'll leave this for future work. This PR exposed several places where regalloc2 needed to be a bit more flexible with constraints; it requires regalloc2#74 to be merged and pulled in. * Update to regalloc2 0.3.3. In addition to version bump, this required removing two asserts as `SpillSlot`s no longer carry their class (so we can't assert that they have the correct class). * Review comments. * Filetest updates. * Add cargo-vet audit for regalloc2 0.3.2 -> 0.3.3 upgrade. * Update to regalloc2 0.4.0.
filetests
Filetests is a crate that contains multiple test suites for testing
various parts of cranelift. Each folder under cranelift/filetests/filetests is a different
test suite that tests different parts.
Adding a runtest
One of the available testsuites is the "runtest" testsuite. Its goal is to compile some piece of clif code, run it and ensure that what comes out is what we expect.
To build a run test you can add the following to a file:
test interpret
test run
target x86_64
target aarch64
target s390x
function %band_f32(f32, f32) -> f32 {
block0(v0: f32, v1: f32):
v2 = band v0, v1
return v2
}
; run: %band_f32(0x0.5, 0x1.0) == 0x1.5
Since this is a run test for band we can put it in: runtests/band.clif.
Once we have the file in the test suite we can run it by invoking: cargo run -- test filetests/filetests/runtests/band.clif from the cranelift directory.
The first lines tell clif-util what kind of tests we want to run on this file.
test interpret invokes the interpreter and checks if the conditions in the ; run comments pass. test run does the same, but compiles the file and runs it as a native binary.
For more information about testing see testing.md.