; LLVM IR from TheAlgorithms/C-Plus-Plus :: hashing (sha256)

; 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] }
%"struct.std::array" = type { [64 x i32] }
%"class.hashing::sha256::Hash" = type { %"struct.std::array.0" }
%"struct.std::array.0" = type { [8 x i32] }

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZN7hashing6sha2564Hash6updateERKSt5arrayIjLm64EE(ptr noundef nonnull align 4 dereferenceable(32), ptr noundef nonnull align 4 dereferenceable(256)) #0 align 2

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

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

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNK7hashing6sha2564Hash9to_stringB5cxx11Ev(ptr dead_on_unwind noalias writable sret(%"class.std::__cxx11::basic_string") align 8, ptr noundef nonnull align 4 dereferenceable(32)) #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i64 @_ZN7hashing6sha25619compute_padded_sizeEm(i64 noundef) #0

; Function Attrs: mustprogress nounwind uwtable
declare noundef i64 @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE6lengthEv(ptr noundef nonnull align 8 dereferenceable(32)) #0 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZN7hashing6sha25629create_message_schedule_arrayERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEm(ptr dead_on_unwind noalias writable sret(%"struct.std::array") align 4, ptr noundef nonnull align 8 dereferenceable(32), i64 noundef) #2

; Function Attrs: mustprogress uwtable
define dso_local void @_ZN7hashing6sha2566sha256ERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE(ptr dead_on_unwind noalias writable sret(%"class.std::__cxx11::basic_string") align 8 %0, ptr noundef nonnull align 8 dereferenceable(32) %1) #2 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca %"class.hashing::sha256::Hash", align 4
  %6 = alloca i64, align 8
  %7 = alloca %"struct.std::array", align 4
  store ptr %0, ptr %3, align 8
  store ptr %1, ptr %4, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 32, ptr %5) #4
  call void @_ZN7hashing6sha2564HashC2Ev(ptr noundef nonnull align 4 dereferenceable(32) %5) #4
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #4
  store i64 0, ptr %6, align 8, !tbaa !9
  br label %8

8:                                                ; preds = %18, %2
  %9 = load i64, ptr %6, align 8, !tbaa !9
  %10 = load ptr, ptr %4, align 8, !tbaa !5
  %11 = call noundef i64 @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE6lengthEv(ptr noundef nonnull align 8 dereferenceable(32) %10) #4
  %12 = call noundef i64 @_ZN7hashing6sha25619compute_padded_sizeEm(i64 noundef %11)
  %13 = icmp ult i64 %9, %12
  br i1 %13, label %15, label %14

14:                                               ; preds = %8
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #4
  br label %21

15:                                               ; preds = %8
  call void @llvm.lifetime.start.p0(i64 256, ptr %7) #4
  %16 = load ptr, ptr %4, align 8, !tbaa !5
  %17 = load i64, ptr %6, align 8, !tbaa !9
  call void @_ZN7hashing6sha25629create_message_schedule_arrayERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEm(ptr dead_on_unwind writable sret(%"struct.std::array") align 4 %7, ptr noundef nonnull align 8 dereferenceable(32) %16, i64 noundef %17)
  call void @_ZN7hashing6sha2564Hash6updateERKSt5arrayIjLm64EE(ptr noundef nonnull align 4 dereferenceable(32) %5, ptr noundef nonnull align 4 dereferenceable(256) %7)
  call void @llvm.lifetime.end.p0(i64 256, ptr %7) #4
  br label %18

18:                                               ; preds = %15
  %19 = load i64, ptr %6, align 8, !tbaa !9
  %20 = add i64 %19, 64
  store i64 %20, ptr %6, align 8, !tbaa !9
  br label %8, !llvm.loop !11

21:                                               ; preds = %14
  call void @_ZNK7hashing6sha2564Hash9to_stringB5cxx11Ev(ptr dead_on_unwind writable sret(%"class.std::__cxx11::basic_string") align 8 %0, ptr noundef nonnull align 4 dereferenceable(32) %5)
  call void @llvm.lifetime.end.p0(i64 32, ptr %5) #4
  ret void
}

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local void @_ZN7hashing6sha2564HashC2Ev(ptr noundef nonnull align 4 dereferenceable(32)) unnamed_addr #3 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" }
attributes #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { 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 = { inlinehint 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 #4 = { 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 = !{!"long", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"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] }
%"struct.std::array" = type { [64 x i32] }
%"class.hashing::sha256::Hash" = type { %"struct.std::array.0" }
%"struct.std::array.0" = type { [8 x i32] }

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZN7hashing6sha2564Hash6updateERKSt5arrayIjLm64EE(ptr noundef nonnull align 4 dereferenceable(32), ptr noundef nonnull align 4 dereferenceable(256)) local_unnamed_addr #0 align 2

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

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

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNK7hashing6sha2564Hash9to_stringB5cxx11Ev(ptr dead_on_unwind noalias writable sret(%"class.std::__cxx11::basic_string") align 8, ptr noundef nonnull align 4 dereferenceable(32)) local_unnamed_addr #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i64 @_ZN7hashing6sha25619compute_padded_sizeEm(i64 noundef) local_unnamed_addr #0

; Function Attrs: mustprogress nounwind uwtable
declare noundef i64 @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE6lengthEv(ptr noundef nonnull align 8 dereferenceable(32)) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZN7hashing6sha25629create_message_schedule_arrayERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEm(ptr dead_on_unwind noalias writable sret(%"struct.std::array") align 4, ptr noundef nonnull align 8 dereferenceable(32), i64 noundef) local_unnamed_addr #2

; Function Attrs: mustprogress uwtable
define dso_local void @_ZN7hashing6sha2566sha256ERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE(ptr dead_on_unwind noalias writable sret(%"class.std::__cxx11::basic_string") align 8 %0, ptr noundef nonnull align 8 dereferenceable(32) %1) local_unnamed_addr #2 {
  %3 = alloca %"class.hashing::sha256::Hash", align 4
  %4 = alloca %"struct.std::array", align 4
  call void @llvm.lifetime.start.p0(i64 32, ptr nonnull %3) #4
  call void @_ZN7hashing6sha2564HashC2Ev(ptr noundef nonnull align 4 dereferenceable(32) %3) #4
  %5 = call noundef i64 @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE6lengthEv(ptr noundef nonnull align 8 dereferenceable(32) %1) #4
  %6 = call noundef i64 @_ZN7hashing6sha25619compute_padded_sizeEm(i64 noundef %5)
  %.not = icmp eq i64 %6, 0
  br i1 %.not, label %._crit_edge, label %.lr.ph

._crit_edge:                                      ; preds = %.lr.ph, %2
  call void @_ZNK7hashing6sha2564Hash9to_stringB5cxx11Ev(ptr dead_on_unwind writable sret(%"class.std::__cxx11::basic_string") align 8 %0, ptr noundef nonnull align 4 dereferenceable(32) %3)
  call void @llvm.lifetime.end.p0(i64 32, ptr nonnull %3) #4
  ret void

.lr.ph:                                           ; preds = %2, %.lr.ph
  %.04 = phi i64 [ %7, %.lr.ph ], [ 0, %2 ]
  call void @llvm.lifetime.start.p0(i64 256, ptr nonnull %4) #4
  call void @_ZN7hashing6sha25629create_message_schedule_arrayERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEm(ptr dead_on_unwind nonnull writable sret(%"struct.std::array") align 4 %4, ptr noundef nonnull align 8 dereferenceable(32) %1, i64 noundef %.04)
  call void @_ZN7hashing6sha2564Hash6updateERKSt5arrayIjLm64EE(ptr noundef nonnull align 4 dereferenceable(32) %3, ptr noundef nonnull align 4 dereferenceable(256) %4)
  call void @llvm.lifetime.end.p0(i64 256, ptr nonnull %4) #4
  %7 = add i64 %.04, 64
  %8 = call noundef i64 @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE6lengthEv(ptr noundef nonnull align 8 dereferenceable(32) %1) #4
  %9 = call noundef i64 @_ZN7hashing6sha25619compute_padded_sizeEm(i64 noundef %8)
  %10 = icmp ult i64 %7, %9
  br i1 %10, label %.lr.ph, label %._crit_edge, !llvm.loop !5
}

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local void @_ZN7hashing6sha2564HashC2Ev(ptr noundef nonnull align 4 dereferenceable(32)) unnamed_addr #3 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" }
attributes #1 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { 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 = { inlinehint 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 #4 = { 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 = distinct !{!5, !6}
!6 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimplifyCFGPass