; LLVM IR from SSBMTonberry/pocketlzma :: ref_spec/lzma1900/CPP/Common/MyString.ll (ZN7UString7ReplaceEww)

; 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.UString = type { ptr, i32, i32 }

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

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

declare i32 @__gxx_personality_v0(...)

; Function Attrs: noinline noreturn nounwind uwtable
declare hidden void @__clang_call_terminate(ptr noundef) #1

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_ZN7UString7ReplaceEww(ptr noundef nonnull align 8 dereferenceable(16) %0, i32 noundef signext %1, i32 noundef signext %2) #2 align 2 personality ptr @__gxx_personality_v0 {
  %4 = alloca ptr, align 8
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  %8 = alloca ptr, align 8
  store ptr %0, ptr %4, align 8, !tbaa !5
  store i32 %1, ptr %5, align 4, !tbaa !9
  store i32 %2, ptr %6, align 4, !tbaa !9
  %9 = load ptr, ptr %4, align 8
  %10 = load i32, ptr %5, align 4, !tbaa !9
  %11 = load i32, ptr %6, align 4, !tbaa !9
  %12 = icmp eq i32 %10, %11
  br i1 %12, label %13, label %14

13:                                               ; preds = %3
  br label %39

14:                                               ; preds = %3
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #3
  store i32 0, ptr %7, align 4, !tbaa !11
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #3
  %15 = getelementptr inbounds %class.UString, ptr %9, i32 0, i32 0
  %16 = load ptr, ptr %15, align 8, !tbaa !13
  store ptr %16, ptr %8, align 8, !tbaa !5
  br label %17

17:                                               ; preds = %30, %14
  %18 = load i32, ptr %7, align 4, !tbaa !11
  %19 = getelementptr inbounds %class.UString, ptr %9, i32 0, i32 1
  %20 = load i32, ptr %19, align 8, !tbaa !15
  %21 = icmp ult i32 %18, %20
  br i1 %21, label %22, label %38

22:                                               ; preds = %17
  %23 = load i32, ptr %5, align 4, !tbaa !9
  %24 = load i32, ptr %7, align 4, !tbaa !11
  %25 = invoke noundef i32 @_ZNK7UString4FindEwj(ptr noundef nonnull align 8 dereferenceable(16) %9, i32 noundef signext %23, i32 noundef %24)
          to label %26 unwind label %40

26:                                               ; preds = %22
  store i32 %25, ptr %7, align 4, !tbaa !11
  %27 = load i32, ptr %7, align 4, !tbaa !11
  %28 = icmp slt i32 %27, 0
  br i1 %28, label %29, label %30

29:                                               ; preds = %26
  br label %38

30:                                               ; preds = %26
  %31 = load i32, ptr %6, align 4, !tbaa !9
  %32 = load ptr, ptr %8, align 8, !tbaa !5
  %33 = load i32, ptr %7, align 4, !tbaa !11
  %34 = zext i32 %33 to i64
  %35 = getelementptr inbounds i32, ptr %32, i64 %34
  store i32 %31, ptr %35, align 4, !tbaa !9
  %36 = load i32, ptr %7, align 4, !tbaa !11
  %37 = add nsw i32 %36, 1
  store i32 %37, ptr %7, align 4, !tbaa !11
  br label %17, !llvm.loop !16

38:                                               ; preds = %29, %17
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #3
  br label %39

39:                                               ; preds = %38, %13
  ret void

40:                                               ; preds = %22
  %41 = landingpad { ptr, i32 }
          catch ptr null
  %42 = extractvalue { ptr, i32 } %41, 0
  call void @__clang_call_terminate(ptr %42) #4
  unreachable
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i32 @_ZNK7UString4FindEwj(ptr noundef nonnull align 8 dereferenceable(16), i32 noundef signext, i32 noundef) #2 align 2

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { noinline noreturn nounwind uwtable "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 = { 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 #3 = { nounwind }
attributes #4 = { noreturn 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, !10, i64 0}
!10 = !{!"wchar_t", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"int", !7, i64 0}
!13 = !{!14, !6, i64 0}
!14 = !{!"_ZTS7UString", !6, i64 0, !12, i64 8, !12, i64 12}
!15 = !{!14, !12, i64 8}
!16 = distinct !{!16, !17}
!17 = !{!"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"

declare i32 @__gxx_personality_v0(...)

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_ZN7UString7ReplaceEww(ptr noundef nonnull align 8 dereferenceable(16) %0, i32 noundef signext %1, i32 noundef signext %2) local_unnamed_addr #0 align 2 personality ptr @__gxx_personality_v0 {
  %4 = icmp eq i32 %1, %2
  br i1 %4, label %.loopexit, label %5

5:                                                ; preds = %3
  %6 = load ptr, ptr %0, align 8, !tbaa !5
  %7 = getelementptr inbounds i8, ptr %0, i64 8
  %8 = load i32, ptr %7, align 8, !tbaa !11
  %.not = icmp eq i32 %8, 0
  br i1 %.not, label %.loopexit, label %.lr.ph

.lr.ph:                                           ; preds = %5, %11
  %.013 = phi i32 [ %14, %11 ], [ 0, %5 ]
  %9 = tail call noundef i32 @_ZNK7UString4FindEwj(ptr noundef nonnull align 8 dereferenceable(16) %0, i32 noundef signext %1, i32 noundef %.013)
  %10 = icmp slt i32 %9, 0
  br i1 %10, label %.loopexit, label %11

11:                                               ; preds = %.lr.ph
  %12 = zext nneg i32 %9 to i64
  %13 = getelementptr inbounds i32, ptr %6, i64 %12
  store i32 %2, ptr %13, align 4, !tbaa !12
  %14 = add nuw nsw i32 %9, 1
  %15 = load i32, ptr %7, align 8, !tbaa !11
  %16 = icmp ult i32 %14, %15
  br i1 %16, label %.lr.ph, label %.loopexit, !llvm.loop !14

.loopexit:                                        ; preds = %.lr.ph, %11, %5, %3
  ret void
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i32 @_ZNK7UString4FindEwj(ptr noundef nonnull align 8 dereferenceable(16), i32 noundef signext, i32 noundef) local_unnamed_addr #0 align 2

attributes #0 = { 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" }

!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 = !{!"_ZTS7UString", !7, i64 0, !10, i64 8, !10, i64 12}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}
!10 = !{!"int", !8, i64 0}
!11 = !{!6, !10, i64 8}
!12 = !{!13, !13, i64 0}
!13 = !{!"wchar_t", !8, i64 0}
!14 = distinct !{!14, !15}
!15 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimplifyCFGPass,TailCallElimPass