; LLVM IR from facebook/redex :: service/method-inliner/CFGInliner.ll (ZN3cfg10CFGInliner14return_to_moveE8IROpcode)

; Unoptimized IR (clang -disable-llvm-passes):
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"

%"class.std::__cxx11::basic_string" = type { %"struct.std::__cxx11::basic_string<char>::_Alloc_hider", i64, %union.anon }
%"struct.std::__cxx11::basic_string<char>::_Alloc_hider" = type { ptr }
%union.anon = type { i64, [8 x i8] }

@.str.9 = external hidden unnamed_addr constant [86 x i8], align 1
@.str.27 = external hidden unnamed_addr constant [16 x i8], align 1
@__PRETTY_FUNCTION__._ZN3cfg10CFGInliner14return_to_moveE8IROpcode = external hidden unnamed_addr constant [58 x i8], align 1
@.str.28 = external hidden unnamed_addr constant [27 x i8], align 1

declare i32 @__gxx_personality_v0(...)

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress nounwind uwtable
declare void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32)) unnamed_addr #1 align 2

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: noreturn
declare void @_Z11assert_failPKcS0_jS0_10RedexErrorS0_z(ptr noundef, ptr noundef, i32 noundef, ptr noundef, i32 noundef, ptr noundef, ...) #2

; Function Attrs: mustprogress nounwind uwtable
declare noundef ptr @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE5c_strEv(ptr noundef nonnull align 8 dereferenceable(32)) #1 align 2

; Function Attrs: mustprogress uwtable
define dso_local noundef zeroext i16 @_ZN3cfg10CFGInliner14return_to_moveE8IROpcode(i16 noundef zeroext %0) #3 align 2 personality ptr @__gxx_personality_v0 {
  %2 = alloca i16, align 2
  %3 = alloca i16, align 2
  %4 = alloca %"class.std::__cxx11::basic_string", align 8
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  store i16 %0, ptr %3, align 2, !tbaa !5
  %7 = load i16, ptr %3, align 2, !tbaa !5
  %8 = zext i16 %7 to i32
  switch i32 %8, label %13 [
    i32 8, label %9
    i32 9, label %10
    i32 10, label %11
    i32 11, label %12
  ]

9:                                                ; preds = %1
  store i16 0, ptr %2, align 2
  br label %25

10:                                               ; preds = %1
  store i16 1, ptr %2, align 2
  br label %25

11:                                               ; preds = %1
  store i16 2, ptr %2, align 2
  br label %25

12:                                               ; preds = %1
  store i16 3, ptr %2, align 2
  br label %25

13:                                               ; preds = %1
  br label %14

14:                                               ; preds = %22, %13
  call void @llvm.lifetime.start.p0(i64 32, ptr %4) #5
  %15 = load i16, ptr %3, align 2, !tbaa !5
  call void @_Z4showB5cxx118IROpcode(ptr dead_on_unwind writable sret(%"class.std::__cxx11::basic_string") align 8 %4, i16 noundef zeroext %15)
  %16 = call noundef ptr @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE5c_strEv(ptr noundef nonnull align 8 dereferenceable(32) %4) #5
  invoke void (ptr, ptr, i32, ptr, i32, ptr, ...) @_Z11assert_failPKcS0_jS0_10RedexErrorS0_z(ptr noundef @.str.27, ptr noundef @.str.9, i32 noundef 595, ptr noundef @__PRETTY_FUNCTION__._ZN3cfg10CFGInliner14return_to_moveE8IROpcode, i32 noundef 2, ptr noundef @.str.28, ptr noundef %16) #6
          to label %17 unwind label %18

17:                                               ; preds = %14
  unreachable

18:                                               ; preds = %14
  %19 = landingpad { ptr, i32 }
          cleanup
  %20 = extractvalue { ptr, i32 } %19, 0
  store ptr %20, ptr %5, align 8
  %21 = extractvalue { ptr, i32 } %19, 1
  store i32 %21, ptr %6, align 4
  call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32) %4) #5
  call void @llvm.lifetime.end.p0(i64 32, ptr %4) #5
  br label %27

22:                                               ; No predecessors!
  br i1 true, label %14, label %23, !llvm.loop !9

23:                                               ; preds = %22
  br label %24

24:                                               ; preds = %23
  unreachable

25:                                               ; preds = %12, %11, %10, %9
  %26 = load i16, ptr %2, align 2
  ret i16 %26

27:                                               ; preds = %18
  %28 = load ptr, ptr %5, align 8
  %29 = load i32, ptr %6, align 4
  %30 = insertvalue { ptr, i32 } poison, ptr %28, 0
  %31 = insertvalue { ptr, i32 } %30, i32 %29, 1
  resume { ptr, i32 } %31
}

declare void @_Z4showB5cxx118IROpcode(ptr dead_on_unwind writable sret(%"class.std::__cxx11::basic_string") align 8, i16 noundef zeroext) #4

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { mustprogress nounwind uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
attributes #2 = { noreturn "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
attributes #3 = { mustprogress uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
attributes #4 = { "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
attributes #5 = { nounwind }
attributes #6 = { noreturn }

!llvm.module.flags = !{!0, !1, !2, !3}
!llvm.ident = !{!4}

!0 = !{i32 1, !"wchar_size", i32 4}
!1 = !{i32 8, !"PIC Level", i32 2}
!2 = !{i32 7, !"PIE Level", i32 2}
!3 = !{i32 7, !"uwtable", i32 2}
!4 = !{!"clang version 19.1.0 (git@github.com:llvm/llvm-project.git a4bf6cd7cfb1a1421ba92bca9d017b49936c55e4)"}
!5 = !{!6, !6, i64 0}
!6 = !{!"_ZTS8IROpcode", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}


; Optimized IR (opt -passes='default<O3>'):
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"

%"class.std::__cxx11::basic_string" = type { %"struct.std::__cxx11::basic_string<char>::_Alloc_hider", i64, %union.anon }
%"struct.std::__cxx11::basic_string<char>::_Alloc_hider" = type { ptr }
%union.anon = type { i64, [8 x i8] }

@.str.9 = external hidden unnamed_addr constant [86 x i8], align 1
@.str.27 = external hidden unnamed_addr constant [16 x i8], align 1
@__PRETTY_FUNCTION__._ZN3cfg10CFGInliner14return_to_moveE8IROpcode = external hidden unnamed_addr constant [58 x i8], align 1
@.str.28 = external hidden unnamed_addr constant [27 x i8], align 1

declare i32 @__gxx_personality_v0(...)

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress nounwind uwtable
declare void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32)) unnamed_addr #1 align 2

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: noreturn
declare void @_Z11assert_failPKcS0_jS0_10RedexErrorS0_z(ptr noundef, ptr noundef, i32 noundef, ptr noundef, i32 noundef, ptr noundef, ...) local_unnamed_addr #2

; Function Attrs: mustprogress nounwind uwtable
declare noundef ptr @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE5c_strEv(ptr noundef nonnull align 8 dereferenceable(32)) local_unnamed_addr #1 align 2

; Function Attrs: mustprogress uwtable
define dso_local noundef zeroext range(i16 0, 4) i16 @_ZN3cfg10CFGInliner14return_to_moveE8IROpcode(i16 noundef zeroext %0) local_unnamed_addr #3 align 2 personality ptr @__gxx_personality_v0 {
  %2 = alloca %"class.std::__cxx11::basic_string", align 8
  %switch.tableidx = add i16 %0, -8
  %3 = icmp ult i16 %switch.tableidx, 4
  br i1 %3, label %switch.lookup, label %4

4:                                                ; preds = %1
  call void @llvm.lifetime.start.p0(i64 32, ptr nonnull %2) #5
  call void @_Z4showB5cxx118IROpcode(ptr dead_on_unwind nonnull writable sret(%"class.std::__cxx11::basic_string") align 8 %2, i16 noundef zeroext %0)
  %5 = call noundef ptr @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE5c_strEv(ptr noundef nonnull align 8 dereferenceable(32) %2) #5
  invoke void (ptr, ptr, i32, ptr, i32, ptr, ...) @_Z11assert_failPKcS0_jS0_10RedexErrorS0_z(ptr noundef nonnull @.str.27, ptr noundef nonnull @.str.9, i32 noundef 595, ptr noundef nonnull @__PRETTY_FUNCTION__._ZN3cfg10CFGInliner14return_to_moveE8IROpcode, i32 noundef 2, ptr noundef nonnull @.str.28, ptr noundef %5) #6
          to label %6 unwind label %7

6:                                                ; preds = %4
  unreachable

7:                                                ; preds = %4
  %8 = landingpad { ptr, i32 }
          cleanup
  call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32) %2) #5
  call void @llvm.lifetime.end.p0(i64 32, ptr nonnull %2) #5
  resume { ptr, i32 } %8

switch.lookup:                                    ; preds = %1
  ret i16 %switch.tableidx
}

declare void @_Z4showB5cxx118IROpcode(ptr dead_on_unwind writable sret(%"class.std::__cxx11::basic_string") align 8, i16 noundef zeroext) local_unnamed_addr #4

attributes #0 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { mustprogress nounwind uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
attributes #2 = { noreturn "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
attributes #3 = { mustprogress uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
attributes #4 = { "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
attributes #5 = { nounwind }
attributes #6 = { noreturn }

!llvm.module.flags = !{!0, !1, !2, !3}
!llvm.ident = !{!4}

!0 = !{i32 1, !"wchar_size", i32 4}
!1 = !{i32 8, !"PIC Level", i32 2}
!2 = !{i32 7, !"PIE Level", i32 2}
!3 = !{i32 7, !"uwtable", i32 2}
!4 = !{!"clang version 19.1.0 (git@github.com:llvm/llvm-project.git a4bf6cd7cfb1a1421ba92bca9d017b49936c55e4)"}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,SROAPass,SimplifyCFGPass