; LLVM IR from ritikbanger/Hacktoberfest2022-DSA :: 09. String (Anagram_string)

; 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::basic_ostream" = type { ptr, %"class.std::basic_ios" }
%"class.std::basic_ios" = type { %"class.std::ios_base", ptr, i8, i8, ptr, ptr, ptr, ptr }
%"class.std::ios_base" = type { ptr, i64, i64, i32, i32, i32, ptr, %"struct.std::ios_base::_Words", [8 x %"struct.std::ios_base::_Words"], i32, ptr, %"class.std::locale" }
%"struct.std::ios_base::_Words" = type { ptr, i64 }
%"class.std::locale" = type { ptr }
%"class.std::basic_istream" = type { ptr, i64, %"class.std::basic_ios" }

@_ZSt4cout = external global %"class.std::basic_ostream", align 8
@.str = external hidden unnamed_addr constant [22 x i8], align 1
@_ZSt3cin = external global %"class.std::basic_istream", align 8
@.str.1 = external hidden unnamed_addr constant [23 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [23 x i8], align 1
@.str.3 = external hidden unnamed_addr constant [27 x i8], align 1

; Function Attrs: mustprogress norecurse uwtable
define dso_local noundef i32 @main() #0 {
  %1 = alloca i32, align 4
  %2 = alloca [10 x i8], align 1
  %3 = alloca [10 x i8], align 1
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca i8, align 1
  %7 = alloca i32, align 4
  %8 = alloca i32, align 4
  %9 = alloca i32, align 4
  store i32 0, ptr %1, align 4
  call void @llvm.lifetime.start.p0(i64 10, ptr %2) #4
  call void @llvm.lifetime.start.p0(i64 10, ptr %3) #4
  %10 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, ptr noundef @.str)
  %11 = getelementptr inbounds [10 x i8], ptr %2, i64 0, i64 0
  %12 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZStrsIcSt11char_traitsIcEERSt13basic_istreamIT_T0_ES6_PS3_(ptr noundef nonnull align 8 dereferenceable(16) @_ZSt3cin, ptr noundef %11)
  %13 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, ptr noundef @.str.1)
  %14 = getelementptr inbounds [10 x i8], ptr %3, i64 0, i64 0
  %15 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZStrsIcSt11char_traitsIcEERSt13basic_istreamIT_T0_ES6_PS3_(ptr noundef nonnull align 8 dereferenceable(16) @_ZSt3cin, ptr noundef %14)
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #4
  %16 = getelementptr inbounds [10 x i8], ptr %2, i64 0, i64 0
  %17 = call i64 @strlen(ptr noundef %16) #5
  %18 = trunc i64 %17 to i32
  store i32 %18, ptr %4, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #4
  %19 = getelementptr inbounds [10 x i8], ptr %3, i64 0, i64 0
  %20 = call i64 @strlen(ptr noundef %19) #5
  %21 = trunc i64 %20 to i32
  store i32 %21, ptr %5, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 1, ptr %6) #4
  store i8 0, ptr %6, align 1, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #4
  store i32 0, ptr %7, align 4, !tbaa !5
  br label %22

22:                                               ; preds = %52, %0
  %23 = load i32, ptr %7, align 4, !tbaa !5
  %24 = load i32, ptr %4, align 4, !tbaa !5
  %25 = icmp slt i32 %23, %24
  br i1 %25, label %27, label %26

26:                                               ; preds = %22
  store i32 2, ptr %8, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #4
  br label %55

27:                                               ; preds = %22
  store i8 0, ptr %6, align 1, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #4
  store i32 0, ptr %9, align 4, !tbaa !5
  br label %28

28:                                               ; preds = %47, %27
  %29 = load i32, ptr %9, align 4, !tbaa !5
  %30 = load i32, ptr %5, align 4, !tbaa !5
  %31 = icmp slt i32 %29, %30
  br i1 %31, label %33, label %32

32:                                               ; preds = %28
  store i32 5, ptr %8, align 4
  br label %50

33:                                               ; preds = %28
  %34 = load i32, ptr %7, align 4, !tbaa !5
  %35 = sext i32 %34 to i64
  %36 = getelementptr inbounds [10 x i8], ptr %2, i64 0, i64 %35
  %37 = load i8, ptr %36, align 1, !tbaa !11
  %38 = sext i8 %37 to i32
  %39 = load i32, ptr %9, align 4, !tbaa !5
  %40 = sext i32 %39 to i64
  %41 = getelementptr inbounds [10 x i8], ptr %3, i64 0, i64 %40
  %42 = load i8, ptr %41, align 1, !tbaa !11
  %43 = sext i8 %42 to i32
  %44 = icmp eq i32 %38, %43
  br i1 %44, label %45, label %46

45:                                               ; preds = %33
  store i8 1, ptr %6, align 1, !tbaa !9
  store i32 5, ptr %8, align 4
  br label %50

46:                                               ; preds = %33
  br label %47

47:                                               ; preds = %46
  %48 = load i32, ptr %9, align 4, !tbaa !5
  %49 = add nsw i32 %48, 1
  store i32 %49, ptr %9, align 4, !tbaa !5
  br label %28, !llvm.loop !12

50:                                               ; preds = %45, %32
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #4
  br label %51

51:                                               ; preds = %50
  br label %52

52:                                               ; preds = %51
  %53 = load i32, ptr %7, align 4, !tbaa !5
  %54 = add nsw i32 %53, 1
  store i32 %54, ptr %7, align 4, !tbaa !5
  br label %22, !llvm.loop !14

55:                                               ; preds = %26
  %56 = load i8, ptr %6, align 1, !tbaa !9, !range !15, !noundef !16
  %57 = trunc i8 %56 to i1
  %58 = zext i1 %57 to i32
  %59 = icmp eq i32 %58, 1
  br i1 %59, label %60, label %62

60:                                               ; preds = %55
  %61 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, ptr noundef @.str.2)
  br label %64

62:                                               ; preds = %55
  %63 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, ptr noundef @.str.3)
  br label %64

64:                                               ; preds = %62, %60
  store i32 0, ptr %1, align 4
  store i32 1, ptr %8, align 4
  call void @llvm.lifetime.end.p0(i64 1, ptr %6) #4
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #4
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #4
  call void @llvm.lifetime.end.p0(i64 10, ptr %3) #4
  call void @llvm.lifetime.end.p0(i64 10, ptr %2) #4
  %65 = load i32, ptr %1, align 4
  ret i32 %65
}

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: inlinehint mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef) #2

; Function Attrs: inlinehint mustprogress uwtable
declare dso_local noundef nonnull align 8 dereferenceable(16) ptr @_ZStrsIcSt11char_traitsIcEERSt13basic_istreamIT_T0_ES6_PS3_(ptr noundef nonnull align 8 dereferenceable(16), ptr noundef nonnull) #2

; Function Attrs: nounwind willreturn memory(read)
declare i64 @strlen(ptr noundef) #3

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

attributes #0 = { mustprogress norecurse 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 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { inlinehint 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 #3 = { nounwind willreturn memory(read) "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 = { nounwind }
attributes #5 = { nounwind willreturn memory(read) }

!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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"bool", !7, i64 0}
!11 = !{!7, !7, i64 0}
!12 = distinct !{!12, !13}
!13 = !{!"llvm.loop.mustprogress"}
!14 = distinct !{!14, !13}
!15 = !{i8 0, i8 2}
!16 = !{}


; 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::basic_ostream" = type { ptr, %"class.std::basic_ios" }
%"class.std::basic_ios" = type { %"class.std::ios_base", ptr, i8, i8, ptr, ptr, ptr, ptr }
%"class.std::ios_base" = type { ptr, i64, i64, i32, i32, i32, ptr, %"struct.std::ios_base::_Words", [8 x %"struct.std::ios_base::_Words"], i32, ptr, %"class.std::locale" }
%"struct.std::ios_base::_Words" = type { ptr, i64 }
%"class.std::locale" = type { ptr }
%"class.std::basic_istream" = type { ptr, i64, %"class.std::basic_ios" }

@_ZSt4cout = external global %"class.std::basic_ostream", align 8
@.str = external hidden unnamed_addr constant [22 x i8], align 1
@_ZSt3cin = external global %"class.std::basic_istream", align 8
@.str.1 = external hidden unnamed_addr constant [23 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [23 x i8], align 1
@.str.3 = external hidden unnamed_addr constant [27 x i8], align 1

; Function Attrs: mustprogress norecurse uwtable
define dso_local noundef i32 @main() local_unnamed_addr #0 {
  %1 = alloca [10 x i8], align 1
  %2 = alloca [10 x i8], align 1
  call void @llvm.lifetime.start.p0(i64 10, ptr nonnull %1) #4
  call void @llvm.lifetime.start.p0(i64 10, ptr nonnull %2) #4
  %3 = tail call noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, ptr noundef nonnull @.str)
  %4 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZStrsIcSt11char_traitsIcEERSt13basic_istreamIT_T0_ES6_PS3_(ptr noundef nonnull align 8 dereferenceable(16) @_ZSt3cin, ptr noundef %1)
  %5 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, ptr noundef nonnull @.str.1)
  %6 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZStrsIcSt11char_traitsIcEERSt13basic_istreamIT_T0_ES6_PS3_(ptr noundef nonnull align 8 dereferenceable(16) @_ZSt3cin, ptr noundef %2)
  %7 = call i64 @strlen(ptr noundef nonnull dereferenceable(1) %1) #5
  %8 = trunc i64 %7 to i32
  %9 = call i64 @strlen(ptr noundef nonnull dereferenceable(1) %2) #5
  %10 = icmp sgt i32 %8, 0
  %11 = trunc i64 %9 to i32
  %12 = icmp sgt i32 %11, 0
  %or.cond = select i1 %10, i1 %12, i1 false
  br i1 %or.cond, label %.preheader.lr.ph.split.us, label %.critedge

.preheader.lr.ph.split.us:                        ; preds = %0
  %13 = load i8, ptr %2, align 1, !tbaa !5
  %14 = and i64 %9, 2147483647
  %wide.trip.count22 = and i64 %7, 2147483647
  %wide.trip.count = and i64 %9, 2147483647
  br label %.preheader.us

.preheader.us:                                    ; preds = %.preheader.us.backedge, %.preheader.lr.ph.split.us
  %indvars.iv19 = phi i64 [ 0, %.preheader.lr.ph.split.us ], [ %indvars.iv19.be, %.preheader.us.backedge ]
  %15 = getelementptr inbounds [10 x i8], ptr %1, i64 0, i64 %indvars.iv19
  %16 = load i8, ptr %15, align 1, !tbaa !5
  %17 = icmp eq i8 %16, %13
  br i1 %17, label %._crit_edge.us.thread, label %.lr.ph

.lr.ph:                                           ; preds = %.preheader.us, %18
  %indvars.iv = phi i64 [ %indvars.iv.next, %18 ], [ 1, %.preheader.us ]
  %exitcond.not = icmp eq i64 %indvars.iv, %wide.trip.count
  br i1 %exitcond.not, label %._crit_edge.us, label %18, !llvm.loop !8

18:                                               ; preds = %.lr.ph
  %19 = getelementptr inbounds [10 x i8], ptr %2, i64 0, i64 %indvars.iv
  %20 = load i8, ptr %19, align 1, !tbaa !5
  %21 = icmp eq i8 %16, %20
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  br i1 %21, label %._crit_edge.us, label %.lr.ph, !llvm.loop !8

._crit_edge.us:                                   ; preds = %.lr.ph, %18
  %indvars.iv.next20 = add nuw nsw i64 %indvars.iv19, 1
  %exitcond23.not = icmp eq i64 %indvars.iv.next20, %wide.trip.count22
  br i1 %exitcond23.not, label %._crit_edge16, label %.preheader.us.backedge

.preheader.us.backedge:                           ; preds = %._crit_edge.us, %._crit_edge.us.thread
  %indvars.iv19.be = phi i64 [ %indvars.iv.next20, %._crit_edge.us ], [ %indvars.iv.next2025, %._crit_edge.us.thread ]
  br label %.preheader.us, !llvm.loop !10

._crit_edge.us.thread:                            ; preds = %.preheader.us
  %indvars.iv.next2025 = add nuw nsw i64 %indvars.iv19, 1
  %exitcond23.not26 = icmp eq i64 %indvars.iv.next2025, %wide.trip.count22
  br i1 %exitcond23.not26, label %._crit_edge16.thread, label %.preheader.us.backedge

._crit_edge16:                                    ; preds = %._crit_edge.us
  %22 = icmp ult i64 %indvars.iv, %14
  br i1 %22, label %._crit_edge16.thread, label %.critedge

.critedge:                                        ; preds = %0, %._crit_edge16
  br label %._crit_edge16.thread

._crit_edge16.thread:                             ; preds = %._crit_edge.us.thread, %._crit_edge16, %.critedge
  %.str.3.sink = phi ptr [ @.str.3, %.critedge ], [ @.str.2, %._crit_edge16 ], [ @.str.2, %._crit_edge.us.thread ]
  %23 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, ptr noundef nonnull %.str.3.sink)
  call void @llvm.lifetime.end.p0(i64 10, ptr nonnull %2) #4
  call void @llvm.lifetime.end.p0(i64 10, ptr nonnull %1) #4
  ret i32 0
}

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: inlinehint mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef) local_unnamed_addr #2

; Function Attrs: inlinehint mustprogress uwtable
declare dso_local noundef nonnull align 8 dereferenceable(16) ptr @_ZStrsIcSt11char_traitsIcEERSt13basic_istreamIT_T0_ES6_PS3_(ptr noundef nonnull align 8 dereferenceable(16), ptr noundef nonnull) local_unnamed_addr #2

; Function Attrs: mustprogress nofree nounwind willreturn memory(argmem: read)
declare i64 @strlen(ptr nocapture noundef) local_unnamed_addr #3

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

attributes #0 = { mustprogress norecurse 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 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { inlinehint 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 #3 = { mustprogress nofree nounwind willreturn memory(argmem: read) "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 = { nounwind }
attributes #5 = { nounwind willreturn memory(read) }

!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 = !{!"omnipotent char", !7, i64 0}
!7 = !{!"Simple C++ TBAA"}
!8 = distinct !{!8, !9}
!9 = !{!"llvm.loop.mustprogress"}
!10 = distinct !{!10, !9}


; Effective O3 passes: CorrelatedValuePropagationPass,EarlyCSEPass,GVNPass,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LICMPass,LoopInstSimplifyPass,LoopRotatePass,LoopSimplifyCFGPass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimplifyCFGPass,TailCallElimPass