diff --git a/cranelift/native/src/lib.rs b/cranelift/native/src/lib.rs index 668a1934bf..3bd5716dac 100644 --- a/cranelift/native/src/lib.rs +++ b/cranelift/native/src/lib.rs @@ -34,10 +34,26 @@ use raw_cpuid::CpuId; /// machine, or `Err(())` if the host machine is not supported /// in the current configuration. pub fn builder() -> Result { - let mut isa_builder = isa::lookup(Triple::host()).map_err(|err| match err { - isa::LookupError::SupportDisabled => "support for architecture disabled at compile time", - isa::LookupError::Unsupported => "unsupported architecture", - })?; + builder_with_backend_variant(isa::BackendVariant::Any) +} + +/// Return an `isa` builder configured for the current host +/// machine, or `Err(())` if the host machine is not supported +/// in the current configuration. +/// +/// Selects the given backend variant specifically; this is +/// useful when more than oen backend exists for a given target +/// (e.g., on x86-64). +pub fn builder_with_backend_variant( + variant: isa::BackendVariant, +) -> Result { + let mut isa_builder = + isa::lookup_variant(Triple::host(), variant).map_err(|err| match err { + isa::LookupError::SupportDisabled => { + "support for architecture disabled at compile time" + } + isa::LookupError::Unsupported => "unsupported architecture", + })?; if cfg!(any(target_arch = "x86", target_arch = "x86_64")) { parse_x86_cpuid(&mut isa_builder)?;