Improve compilation speed by reducing expanded llvm lines about miette HOT 4 CLOSED

; miette::eyreish::error::object_downcast
; Function Attrs: uwtable
define ptr @_ZN6miette7eyreish5error15object_downcast17h036d603efeb56cf6E(ptr %e, i64 %0, i64 %1) unnamed_addr #1 {
start:
  %_5 = alloca %"core::any::TypeId", align 8
  %_0 = alloca ptr, align 8
  %target = alloca %"core::any::TypeId", align 8
  store i64 %0, ptr %target, align 8
  %2 = getelementptr inbounds i8, ptr %target, i64 8
  store i64 %1, ptr %2, align 8
; call core::any::TypeId::of
  %3 = call { i64, i64 } @_ZN4core3any6TypeId2of17h7dd1498b91903dceE()
  %4 = extractvalue { i64, i64 } %3, 0
  %5 = extractvalue { i64, i64 } %3, 1
  store i64 %4, ptr %_5, align 8
  %6 = getelementptr inbounds i8, ptr %_5, i64 8
  store i64 %5, ptr %6, align 8
; call <core::any::TypeId as core::cmp::PartialEq>::eq
  %_3 = call zeroext i1 @"_ZN58_$LT$core..any..TypeId$u20$as$u20$core..cmp..PartialEq$GT$2eq17h3ec8c0e5dcb956b2E"(ptr align 8 %_5, ptr align 8 %target)
  br i1 %_3, label %bb3, label %bb9

bb9:                                              ; preds = %start
  store ptr null, ptr %_0, align 8
  br label %bb10

bb3:                                              ; preds = %start
; call miette::eyreish::ptr::Ref<T>::cast
  %unerased = call ptr @"_ZN6miette7eyreish3ptr12Ref$LT$T$GT$4cast17hb52e031c6b285058E"(ptr %e)
; call miette::eyreish::ptr::Ref<T>::as_ptr
  %_13 = call ptr @"_ZN6miette7eyreish3ptr12Ref$LT$T$GT$6as_ptr17h4a06fcac3ef26180E"(ptr %unerased)
  %_12 = getelementptr inbounds i8, ptr %_13, i64 24
; call core::ptr::non_null::NonNull<T>::new_unchecked
  %_10 = call ptr @"_ZN4core3ptr8non_null16NonNull$LT$T$GT$13new_unchecked17h0f63ba3cd42f3548E"(ptr %_12)
; call miette::eyreish::ptr::Ref<T>::from_raw
  %_9 = call ptr @"_ZN6miette7eyreish3ptr12Ref$LT$T$GT$8from_raw17h17a12303579934dfE"(ptr %_10)
; call miette::eyreish::ptr::Ref<T>::cast
  %_8 = call ptr @"_ZN6miette7eyreish3ptr12Ref$LT$T$GT$4cast17h228ea4cc31de5266E"(ptr %_9)
  store ptr %_8, ptr %_0, align 8
  br label %bb10

bb10:                                             ; preds = %bb3, %bb9
  %7 = load ptr, ptr %_0, align 8, !noundef !3
  ret ptr %7
}