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Cranelift: ensure ISA level needed for SIMD is present when SIMD is enabled. (#3816)

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Addresses #3809: when we are asked to create a Cranelift backend with
shared flags that indicate support for SIMD, we should check that the
ISA level needed for our SIMD lowerings is present.
This commit is contained in:
Chris Fallin
2022-02-16 17:29:30 -08:00
committed by GitHub
parent ef17a36852
commit 1c014d129a
55 changed files with 172 additions and 84 deletions
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8
cranelift/jit/src/backend.rs
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@@ -42,7 +42,9 @@ impl JITBuilder {
/// enum to symbols. LibCalls are inserted in the IR as part of the legalization for certain
/// floating point instructions, and for stack probes. If you don't know what to use for this
/// argument, use `cranelift_module::default_libcall_names()`.
pub fn new(libcall_names: Box<dyn Fn(ir::LibCall) -> String + Send + Sync>) -> Self {
pub fn new(
libcall_names: Box<dyn Fn(ir::LibCall) -> String + Send + Sync>,
) -> ModuleResult<Self> {
let mut flag_builder = settings::builder();
// On at least AArch64, "colocated" calls use shorter-range relocations,
// which might not reach all definitions; we can't handle that here, so
@@ -52,8 +54,8 @@ impl JITBuilder {
let isa_builder = cranelift_native::builder().unwrap_or_else(|msg| {
panic!("host machine is not supported: {}", msg);
});
let isa = isa_builder.finish(settings::Flags::new(flag_builder));
Self::with_isa(isa, libcall_names)
let isa = isa_builder.finish(settings::Flags::new(flag_builder))?;
Ok(Self::with_isa(isa, libcall_names))
}
/// Create a new `JITBuilder` with an arbitrary target. This is mainly