Cranelift AArch64: Migrate Splat to ISLE (#4521)

Copyright (c) 2022, Arm Limited.

cranelift/codegen/src/isa/aarch64/inst/mod.rs

@@ -530,17 +530,6 @@ impl Inst {
             }
         }
     }
-
-    /// Generate a LoadAddr instruction (load address of an amode into
-    /// register). Elides when possible (when amode is just a register). Returns
-    /// destination register: either `rd` or a register directly from the amode.
-    pub fn gen_load_addr(rd: Writable<Reg>, mem: AMode) -> (Reg, Option<Inst>) {
-        if let Some(r) = mem.is_reg() {
-            (r, None)
-        } else {
-            (rd.to_reg(), Some(Inst::LoadAddr { rd, mem }))
-        }
-    }
 }
 
 //=============================================================================