cranelift-codegen(x64): Expose CallInfo (#6005)

This commit exposes the `CallInfo` struct, needed by Winch to emit function
calls.

cranelift/codegen/src/isa/x64/inst/mod.rs

@@ -30,7 +30,7 @@ use args::*;
 // `Inst` is defined inside ISLE as `MInst`. We publicly re-export it here.
 pub use super::lower::isle::generated_code::MInst as Inst;
 
-// Out-of-line data for calls, to keep the size of `Inst` downn.
+/// Out-of-line data for calls, to keep the size of `Inst` down.
 #[derive(Clone, Debug)]
 pub struct CallInfo {
     /// Register uses of this call.

cranelift/codegen/src/isa/x64/mod.rs

@@ -1,6 +1,6 @@
 //! X86_64-bit Instruction Set Architecture.
 
-pub use self::inst::{args, EmitInfo, EmitState, Inst};
+pub use self::inst::{args, CallInfo, EmitInfo, EmitState, Inst};
 
 use super::{OwnedTargetIsa, TargetIsa};
 use crate::dominator_tree::DominatorTree;