1 files changed, 28 insertions, 0 deletions
diff --git a/third_party/rust/cranelift-codegen/src/machinst/helpers.rs b/third_party/rust/cranelift-codegen/src/machinst/helpers.rs
new file mode 100644
index 0000000000..0138da7670
--- /dev/null
+++ b/third_party/rust/cranelift-codegen/src/machinst/helpers.rs
@@ -0,0 +1,28 @@
+//! Miscellaneous helpers for machine backends.
+
+use super::{InsnOutput, LowerCtx, VCodeInst};
+use crate::ir::Type;
+use regalloc::{Reg, Writable};
+
+/// Returns the size (in bits) of a given type.
+pub fn ty_bits(ty: Type) -> usize {
+    usize::from(ty.bits())
+}
+
+/// Is the type represented by an integer (not float) at the machine level?
+pub(crate) fn ty_has_int_representation(ty: Type) -> bool {
+    ty.is_int() || ty.is_bool() || ty.is_ref()
+}
+
+/// Is the type represented by a float or vector value at the machine level?
+pub(crate) fn ty_has_float_or_vec_representation(ty: Type) -> bool {
+    ty.is_vector() || ty.is_float()
+}
+
+/// Allocate a register for an instruction output and return it.
+pub(crate) fn get_output_reg<I: VCodeInst, C: LowerCtx<I = I>>(
+    ctx: &mut C,
+    spec: InsnOutput,
+) -> Writable<Reg> {
+    ctx.get_output(spec.insn, spec.output)
+}