[llvm] [PAC][CodeGen] Do not emit trivial 'mov xN xN' on tail call (PR #109100)

[Anatoly Trosinenko via llvm-commits]

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@@ -167,6 +167,28 @@ define i32 @test_tailcall_ib_var(ptr %arg0, ptr %arg1) #0 {
   ret i32 %tmp1
 }
 
+define void @test_tailcall_omit_mov_x16_x16(ptr %t) {
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atrosinenko wrote:

[nit] Merely for uniformity:
```suggestion
define void @test_tailcall_omit_mov_x16_x16(ptr %t) #0 {
```

https://github.com/llvm/llvm-project/pull/109100