; LLVM IR from louk78/crypto_project :: sha256 (sha256_update)

; 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"

%struct.sha256_ctx_t = type { [64 x i8], [8 x i32], i32, [2 x i32] }

; Function Attrs: nounwind uwtable
define dso_local void @sha256_update(ptr noundef %0, ptr noundef %1, i32 noundef %2) #0 {
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !5
  store i32 %2, ptr %6, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #2
  store i32 0, ptr %7, align 4, !tbaa !9
  br label %8

8:                                                ; preds = %39, %3
  %9 = load i32, ptr %7, align 4, !tbaa !9
  %10 = load i32, ptr %6, align 4, !tbaa !9
  %11 = icmp ult i32 %9, %10
  br i1 %11, label %12, label %42

12:                                               ; preds = %8
  %13 = load ptr, ptr %5, align 8, !tbaa !5
  %14 = load i32, ptr %7, align 4, !tbaa !9
  %15 = zext i32 %14 to i64
  %16 = getelementptr inbounds i8, ptr %13, i64 %15
  %17 = load i8, ptr %16, align 1, !tbaa !11
  %18 = load ptr, ptr %4, align 8, !tbaa !5
  %19 = getelementptr inbounds %struct.sha256_ctx_t, ptr %18, i32 0, i32 0
  %20 = load ptr, ptr %4, align 8, !tbaa !5
  %21 = getelementptr inbounds %struct.sha256_ctx_t, ptr %20, i32 0, i32 2
  %22 = load i32, ptr %21, align 4, !tbaa !12
  %23 = zext i32 %22 to i64
  %24 = getelementptr inbounds [64 x i8], ptr %19, i64 0, i64 %23
  store i8 %17, ptr %24, align 1, !tbaa !11
  %25 = load ptr, ptr %4, align 8, !tbaa !5
  %26 = getelementptr inbounds %struct.sha256_ctx_t, ptr %25, i32 0, i32 2
  %27 = load i32, ptr %26, align 4, !tbaa !12
  %28 = add i32 %27, 1
  store i32 %28, ptr %26, align 4, !tbaa !12
  %29 = load ptr, ptr %4, align 8, !tbaa !5
  %30 = getelementptr inbounds %struct.sha256_ctx_t, ptr %29, i32 0, i32 2
  %31 = load i32, ptr %30, align 4, !tbaa !12
  %32 = icmp eq i32 %31, 64
  br i1 %32, label %33, label %38

33:                                               ; preds = %12
  %34 = load ptr, ptr %4, align 8, !tbaa !5
  call void @compress(ptr noundef %34)
  %35 = load ptr, ptr %4, align 8, !tbaa !5
  call void @bit_len_add(ptr noundef %35, i32 noundef 512)
  %36 = load ptr, ptr %4, align 8, !tbaa !5
  %37 = getelementptr inbounds %struct.sha256_ctx_t, ptr %36, i32 0, i32 2
  store i32 0, ptr %37, align 4, !tbaa !12
  br label %38

38:                                               ; preds = %33, %12
  br label %39

39:                                               ; preds = %38
  %40 = load i32, ptr %7, align 4, !tbaa !9
  %41 = add i32 %40, 1
  store i32 %41, ptr %7, align 4, !tbaa !9
  br label %8, !llvm.loop !14

42:                                               ; preds = %8
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #2
  ret void
}

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

; Function Attrs: nounwind uwtable
declare hidden void @compress(ptr noundef) #0

; Function Attrs: nounwind uwtable
declare hidden void @bit_len_add(ptr noundef, i32 noundef) #0

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

attributes #0 = { 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 = { 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/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = !{!7, !7, i64 0}
!12 = !{!13, !10, i64 96}
!13 = !{!"", !7, i64 0, !7, i64 64, !10, i64 96, !7, i64 100}
!14 = distinct !{!14, !15}
!15 = !{!"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"

; Function Attrs: nounwind uwtable
define dso_local void @sha256_update(ptr noundef %0, ptr nocapture noundef readonly %1, i32 noundef %2) local_unnamed_addr #0 {
  %.not = icmp eq i32 %2, 0
  br i1 %.not, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %3
  %4 = getelementptr inbounds i8, ptr %0, i64 96
  %wide.trip.count = zext i32 %2 to i64
  %.pre = load i32, ptr %4, align 4, !tbaa !5
  br label %5

5:                                                ; preds = %.lr.ph, %15
  %6 = phi i32 [ %.pre, %.lr.ph ], [ %16, %15 ]
  %indvars.iv = phi i64 [ 0, %.lr.ph ], [ %indvars.iv.next, %15 ]
  %7 = getelementptr inbounds i8, ptr %1, i64 %indvars.iv
  %8 = load i8, ptr %7, align 1, !tbaa !10
  %9 = zext i32 %6 to i64
  %10 = getelementptr inbounds [64 x i8], ptr %0, i64 0, i64 %9
  store i8 %8, ptr %10, align 1, !tbaa !10
  %11 = load i32, ptr %4, align 4, !tbaa !5
  %12 = add i32 %11, 1
  store i32 %12, ptr %4, align 4, !tbaa !5
  %13 = icmp eq i32 %12, 64
  br i1 %13, label %14, label %15

14:                                               ; preds = %5
  tail call void @compress(ptr noundef nonnull %0)
  tail call void @bit_len_add(ptr noundef nonnull %0, i32 noundef 512)
  store i32 0, ptr %4, align 4, !tbaa !5
  br label %15

15:                                               ; preds = %5, %14
  %16 = phi i32 [ %12, %5 ], [ 0, %14 ]
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %exitcond.not = icmp eq i64 %indvars.iv.next, %wide.trip.count
  br i1 %exitcond.not, label %._crit_edge, label %5, !llvm.loop !11

._crit_edge:                                      ; preds = %15, %3
  ret void
}

; Function Attrs: nounwind uwtable
declare hidden void @compress(ptr noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
declare hidden void @bit_len_add(ptr noundef, i32 noundef) local_unnamed_addr #0

attributes #0 = { 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, !9, i64 96}
!6 = !{!"", !7, i64 0, !7, i64 64, !9, i64 96, !7, i64 100}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!"int", !7, i64 0}
!10 = !{!7, !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: CorrelatedValuePropagationPass,EarlyCSEPass,GVNPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass