Cranelift: bmask not implemented for any type on x86_64

[afonso360]

👋 Hey,

This was noted recently in #5031, but I'm adding these to fuzzgen as well and It's complaining about it.

.clif Test Case

test interpret
test run
set enable_llvm_abi_extensions=true
target x86_64

function %a(i64) -> i64 {
block0(v0: i64):
    v1 = bmask.i64 v0
    return v1
}
; run: %a(1) == -1

Steps to Reproduce

• clif-util test ./the-above.clif

Expected Results

The above tests to pass.

Actual Results

    Finished dev [unoptimized + debuginfo] target(s) in 0.14s
     Running `/home/afonso/git/wasmtime/target/debug/clif-util test ./lmao.clif`
thread 'worker #0' panicked at 'not implemented: Bmask not implemented', cranelift/codegen/src/isa/x64/lower.rs:500:26
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
 ERROR cranelift_filetests::concurrent > FAIL: panicked in worker #0: not implemented: Bmask not implemented
FAIL ./lmao.clif: panicked in worker #0: not implemented: Bmask not implemented
1 tests
Error: 1 failure

Versions and Environment

Cranelift version or commit: main
Operating system: Windows
Architecture: x86_64