; LLVM IR from tleonhardt/practical_cryptography_engineering :: mbedtls (entropy)

; 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"

@.str.1 = external hidden unnamed_addr constant [3 x i8], align 1

; 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

; Function Attrs: nounwind uwtable
declare dso_local i32 @mbedtls_entropy_update_manual(ptr noundef, ptr noundef, i64 noundef) #1

; Function Attrs: nounwind uwtable
declare dso_local i32 @mbedtls_entropy_write_seed_file(ptr noundef, ptr noundef) #1

declare noalias ptr @fopen(ptr noundef, ptr noundef) #2

declare i32 @fclose(ptr noundef) #2

; Function Attrs: nounwind uwtable
define dso_local i32 @mbedtls_entropy_update_seed_file(ptr noundef %0, ptr noundef %1) #1 {
  %3 = alloca i32, align 4
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca ptr, align 8
  %7 = alloca i64, align 8
  %8 = alloca [1024 x i8], align 16
  %9 = alloca i32, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #3
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #3
  call void @llvm.lifetime.start.p0(i64 1024, ptr %8) #3
  %10 = load ptr, ptr %5, align 8, !tbaa !5
  %11 = call noalias ptr @fopen(ptr noundef %10, ptr noundef @.str.1)
  store ptr %11, ptr %6, align 8, !tbaa !5
  %12 = icmp eq ptr %11, null
  br i1 %12, label %13, label %14

13:                                               ; preds = %2
  store i32 -63, ptr %3, align 4
  store i32 1, ptr %9, align 4
  br label %44

14:                                               ; preds = %2
  %15 = load ptr, ptr %6, align 8, !tbaa !5
  %16 = call i32 @fseek(ptr noundef %15, i64 noundef 0, i32 noundef 2)
  %17 = load ptr, ptr %6, align 8, !tbaa !5
  %18 = call i64 @ftell(ptr noundef %17)
  store i64 %18, ptr %7, align 8, !tbaa !9
  %19 = load ptr, ptr %6, align 8, !tbaa !5
  %20 = call i32 @fseek(ptr noundef %19, i64 noundef 0, i32 noundef 0)
  %21 = load i64, ptr %7, align 8, !tbaa !9
  %22 = icmp ugt i64 %21, 1024
  br i1 %22, label %23, label %24

23:                                               ; preds = %14
  store i64 1024, ptr %7, align 8, !tbaa !9
  br label %24

24:                                               ; preds = %23, %14
  %25 = getelementptr inbounds [1024 x i8], ptr %8, i64 0, i64 0
  %26 = load i64, ptr %7, align 8, !tbaa !9
  %27 = load ptr, ptr %6, align 8, !tbaa !5
  %28 = call i64 @fread(ptr noundef %25, i64 noundef 1, i64 noundef %26, ptr noundef %27)
  %29 = load i64, ptr %7, align 8, !tbaa !9
  %30 = icmp ne i64 %28, %29
  br i1 %30, label %31, label %34

31:                                               ; preds = %24
  %32 = load ptr, ptr %6, align 8, !tbaa !5
  %33 = call i32 @fclose(ptr noundef %32)
  store i32 -63, ptr %3, align 4
  store i32 1, ptr %9, align 4
  br label %44

34:                                               ; preds = %24
  %35 = load ptr, ptr %6, align 8, !tbaa !5
  %36 = call i32 @fclose(ptr noundef %35)
  %37 = load ptr, ptr %4, align 8, !tbaa !5
  %38 = getelementptr inbounds [1024 x i8], ptr %8, i64 0, i64 0
  %39 = load i64, ptr %7, align 8, !tbaa !9
  %40 = call i32 @mbedtls_entropy_update_manual(ptr noundef %37, ptr noundef %38, i64 noundef %39)
  %41 = load ptr, ptr %4, align 8, !tbaa !5
  %42 = load ptr, ptr %5, align 8, !tbaa !5
  %43 = call i32 @mbedtls_entropy_write_seed_file(ptr noundef %41, ptr noundef %42)
  store i32 %43, ptr %3, align 4
  store i32 1, ptr %9, align 4
  br label %44

44:                                               ; preds = %34, %31, %13
  call void @llvm.lifetime.end.p0(i64 1024, ptr %8) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #3
  %45 = load i32, ptr %3, align 4
  ret i32 %45
}

declare i32 @fseek(ptr noundef, i64 noundef, i32 noundef) #2

declare i64 @ftell(ptr noundef) #2

declare i64 @fread(ptr noundef, i64 noundef, i64 noundef, ptr noundef) #2

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #2 = { "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 }

!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 = !{!"long", !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"

@.str.1 = external hidden unnamed_addr constant [3 x i8], align 1

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

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

; Function Attrs: nounwind uwtable
declare dso_local i32 @mbedtls_entropy_update_manual(ptr noundef, ptr noundef, i64 noundef) local_unnamed_addr #1

; Function Attrs: nounwind uwtable
declare dso_local i32 @mbedtls_entropy_write_seed_file(ptr noundef, ptr noundef) local_unnamed_addr #1

; Function Attrs: nofree nounwind
declare noalias noundef ptr @fopen(ptr nocapture noundef readonly, ptr nocapture noundef readonly) local_unnamed_addr #2

; Function Attrs: nofree nounwind
declare noundef i32 @fclose(ptr nocapture noundef) local_unnamed_addr #2

; Function Attrs: nounwind uwtable
define dso_local i32 @mbedtls_entropy_update_seed_file(ptr noundef %0, ptr noundef %1) local_unnamed_addr #1 {
  %3 = alloca [1024 x i8], align 16
  call void @llvm.lifetime.start.p0(i64 1024, ptr nonnull %3) #4
  %4 = tail call noalias ptr @fopen(ptr noundef %1, ptr noundef nonnull @.str.1)
  %5 = icmp eq ptr %4, null
  br i1 %5, label %15, label %6

6:                                                ; preds = %2
  %7 = tail call i32 @fseek(ptr noundef nonnull %4, i64 noundef 0, i32 noundef 2)
  %8 = tail call i64 @ftell(ptr noundef nonnull %4)
  %9 = tail call i32 @fseek(ptr noundef nonnull %4, i64 noundef 0, i32 noundef 0)
  %spec.store.select = tail call i64 @llvm.umin.i64(i64 %8, i64 1024)
  %10 = call i64 @fread(ptr noundef nonnull %3, i64 noundef 1, i64 noundef %spec.store.select, ptr noundef nonnull %4)
  %.not = icmp eq i64 %10, %spec.store.select
  %11 = tail call i32 @fclose(ptr noundef nonnull %4)
  br i1 %.not, label %12, label %15

12:                                               ; preds = %6
  %13 = call i32 @mbedtls_entropy_update_manual(ptr noundef %0, ptr noundef nonnull %3, i64 noundef %spec.store.select)
  %14 = call i32 @mbedtls_entropy_write_seed_file(ptr noundef %0, ptr noundef %1)
  br label %15

15:                                               ; preds = %6, %2, %12
  %.0 = phi i32 [ %14, %12 ], [ -63, %2 ], [ -63, %6 ]
  call void @llvm.lifetime.end.p0(i64 1024, ptr nonnull %3) #4
  ret i32 %.0
}

; Function Attrs: nofree nounwind
declare noundef i32 @fseek(ptr nocapture noundef, i64 noundef, i32 noundef) local_unnamed_addr #2

; Function Attrs: nofree nounwind
declare noundef i64 @ftell(ptr nocapture noundef) local_unnamed_addr #2

; Function Attrs: nofree nounwind
declare noundef i64 @fread(ptr nocapture noundef, i64 noundef, i64 noundef, ptr nocapture noundef) local_unnamed_addr #2

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i64 @llvm.umin.i64(i64, i64) #3

attributes #0 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #2 = { nofree 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 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }
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)"}


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