; LLVM IR from gem5/gem5 :: ext/systemc/src/sysc/utils/sc_string.ll (ZN5sc_dt13sc_string_oldaSEPKc)

; 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.sc_dt::sc_string_old" = type { ptr }
%"class.sc_dt::sc_string_rep" = type { i32, i32, ptr }

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZN5sc_dt13sc_string_rep10set_stringEPKc(ptr noundef nonnull align 8 dereferenceable(16), ptr noundef) #0 align 2

; Function Attrs: nobuiltin allocsize(0)
declare noundef nonnull ptr @_Znwm(i64 noundef) #1

declare i32 @__gxx_personality_v0(...)

; Function Attrs: nobuiltin nounwind
declare void @_ZdlPvm(ptr noundef, i64 noundef) #2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZN5sc_dt13sc_string_repC2EPKc(ptr noundef nonnull align 8 dereferenceable(16), ptr noundef) unnamed_addr #0 align 2

; Function Attrs: mustprogress uwtable
define dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZN5sc_dt13sc_string_oldaSEPKc(ptr noundef nonnull align 8 dereferenceable(8) %0, ptr noundef %1) #0 align 2 personality ptr @__gxx_personality_v0 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  store ptr %1, ptr %4, align 8, !tbaa !5
  %7 = load ptr, ptr %3, align 8
  %8 = getelementptr inbounds %"class.sc_dt::sc_string_old", ptr %7, i32 0, i32 0
  %9 = load ptr, ptr %8, align 8, !tbaa !9
  %10 = getelementptr inbounds %"class.sc_dt::sc_string_rep", ptr %9, i32 0, i32 0
  %11 = load i32, ptr %10, align 8, !tbaa !11
  %12 = icmp sgt i32 %11, 1
  br i1 %12, label %13, label %27

13:                                               ; preds = %2
  %14 = getelementptr inbounds %"class.sc_dt::sc_string_old", ptr %7, i32 0, i32 0
  %15 = load ptr, ptr %14, align 8, !tbaa !9
  %16 = getelementptr inbounds %"class.sc_dt::sc_string_rep", ptr %15, i32 0, i32 0
  %17 = load i32, ptr %16, align 8, !tbaa !11
  %18 = add nsw i32 %17, -1
  store i32 %18, ptr %16, align 8, !tbaa !11
  %19 = call noalias noundef nonnull ptr @_Znwm(i64 noundef 16) #3
  %20 = load ptr, ptr %4, align 8, !tbaa !5
  invoke void @_ZN5sc_dt13sc_string_repC2EPKc(ptr noundef nonnull align 8 dereferenceable(16) %19, ptr noundef %20)
          to label %21 unwind label %23

21:                                               ; preds = %13
  %22 = getelementptr inbounds %"class.sc_dt::sc_string_old", ptr %7, i32 0, i32 0
  store ptr %19, ptr %22, align 8, !tbaa !9
  br label %31

23:                                               ; preds = %13
  %24 = landingpad { ptr, i32 }
          cleanup
  %25 = extractvalue { ptr, i32 } %24, 0
  store ptr %25, ptr %5, align 8
  %26 = extractvalue { ptr, i32 } %24, 1
  store i32 %26, ptr %6, align 4
  call void @_ZdlPvm(ptr noundef %19, i64 noundef 16) #4
  br label %32

27:                                               ; preds = %2
  %28 = getelementptr inbounds %"class.sc_dt::sc_string_old", ptr %7, i32 0, i32 0
  %29 = load ptr, ptr %28, align 8, !tbaa !9
  %30 = load ptr, ptr %4, align 8, !tbaa !5
  call void @_ZN5sc_dt13sc_string_rep10set_stringEPKc(ptr noundef nonnull align 8 dereferenceable(16) %29, ptr noundef %30)
  br label %31

31:                                               ; preds = %27, %21
  ret ptr %7

32:                                               ; preds = %23
  %33 = load ptr, ptr %5, align 8
  %34 = load i32, ptr %6, align 4
  %35 = insertvalue { ptr, i32 } poison, ptr %33, 0
  %36 = insertvalue { ptr, i32 } %35, i32 %34, 1
  resume { ptr, i32 } %36
}

attributes #0 = { 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 #1 = { nobuiltin allocsize(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 = { nobuiltin nounwind "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 = { builtin allocsize(0) }
attributes #4 = { builtin nounwind }

!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 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !6, i64 0}
!10 = !{!"_ZTSN5sc_dt13sc_string_oldE", !6, i64 0}
!11 = !{!12, !13, i64 0}
!12 = !{!"_ZTSN5sc_dt13sc_string_repE", !13, i64 0, !13, i64 4, !6, i64 8}
!13 = !{!"int", !7, i64 0}


; 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"

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZN5sc_dt13sc_string_rep10set_stringEPKc(ptr noundef nonnull align 8 dereferenceable(16), ptr noundef) local_unnamed_addr #0 align 2

; Function Attrs: nobuiltin allocsize(0)
declare noundef nonnull ptr @_Znwm(i64 noundef) local_unnamed_addr #1

declare i32 @__gxx_personality_v0(...)

; Function Attrs: nobuiltin nounwind
declare void @_ZdlPvm(ptr noundef, i64 noundef) local_unnamed_addr #2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZN5sc_dt13sc_string_repC2EPKc(ptr noundef nonnull align 8 dereferenceable(16), ptr noundef) unnamed_addr #0 align 2

; Function Attrs: mustprogress uwtable
define dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZN5sc_dt13sc_string_oldaSEPKc(ptr noundef nonnull returned align 8 dereferenceable(8) %0, ptr noundef %1) local_unnamed_addr #0 align 2 personality ptr @__gxx_personality_v0 {
  %3 = load ptr, ptr %0, align 8, !tbaa !5
  %4 = load i32, ptr %3, align 8, !tbaa !10
  %5 = icmp sgt i32 %4, 1
  br i1 %5, label %6, label %12

6:                                                ; preds = %2
  %7 = add nsw i32 %4, -1
  store i32 %7, ptr %3, align 8, !tbaa !10
  %8 = tail call noalias noundef nonnull dereferenceable(16) ptr @_Znwm(i64 noundef 16) #3
  invoke void @_ZN5sc_dt13sc_string_repC2EPKc(ptr noundef nonnull align 8 dereferenceable(16) %8, ptr noundef %1)
          to label %9 unwind label %10

9:                                                ; preds = %6
  store ptr %8, ptr %0, align 8, !tbaa !5
  br label %13

10:                                               ; preds = %6
  %11 = landingpad { ptr, i32 }
          cleanup
  tail call void @_ZdlPvm(ptr noundef nonnull %8, i64 noundef 16) #4
  resume { ptr, i32 } %11

12:                                               ; preds = %2
  tail call void @_ZN5sc_dt13sc_string_rep10set_stringEPKc(ptr noundef nonnull align 8 dereferenceable(16) %3, ptr noundef %1)
  br label %13

13:                                               ; preds = %12, %9
  ret ptr %0
}

attributes #0 = { 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 #1 = { nobuiltin allocsize(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 = { nobuiltin nounwind "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 = { builtin allocsize(0) }
attributes #4 = { builtin nounwind }

!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, !7, i64 0}
!6 = !{!"_ZTSN5sc_dt13sc_string_oldE", !7, i64 0}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}
!10 = !{!11, !12, i64 0}
!11 = !{!"_ZTSN5sc_dt13sc_string_repE", !12, i64 0, !12, i64 4, !7, i64 8}
!12 = !{!"int", !8, i64 0}


; Effective O3 passes: CorrelatedValuePropagationPass,EarlyCSEPass,GlobalOptPass,InstCombinePass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass