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

; 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"

@has_getrandom = external hidden global i32, align 4
@.str = external hidden unnamed_addr constant [13 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [3 x i8], align 1

; Function Attrs: nounwind uwtable
define dso_local i32 @mbedtls_platform_entropy_poll(ptr noundef %0, ptr noundef %1, i64 noundef %2, ptr noundef %3) #0 {
  %5 = alloca i32, align 4
  %6 = alloca ptr, align 8
  %7 = alloca ptr, align 8
  %8 = alloca i64, align 8
  %9 = alloca ptr, align 8
  %10 = alloca ptr, align 8
  %11 = alloca i64, align 8
  %12 = alloca i32, align 4
  %13 = alloca i32, align 4
  store ptr %0, ptr %6, align 8, !tbaa !5
  store ptr %1, ptr %7, align 8, !tbaa !5
  store i64 %2, ptr %8, align 8, !tbaa !9
  store ptr %3, ptr %9, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %10) #3
  call void @llvm.lifetime.start.p0(i64 8, ptr %11) #3
  %14 = load ptr, ptr %6, align 8, !tbaa !5
  %15 = load i32, ptr @has_getrandom, align 4, !tbaa !11
  %16 = icmp eq i32 %15, -1
  br i1 %16, label %17, label %21

17:                                               ; preds = %4
  %18 = call i32 @check_version_3_17_plus()
  %19 = icmp eq i32 %18, 0
  %20 = zext i1 %19 to i32
  store i32 %20, ptr @has_getrandom, align 4, !tbaa !11
  br label %21

21:                                               ; preds = %17, %4
  %22 = load i32, ptr @has_getrandom, align 4, !tbaa !11
  %23 = icmp ne i32 %22, 0
  br i1 %23, label %24, label %35

24:                                               ; preds = %21
  call void @llvm.lifetime.start.p0(i64 4, ptr %12) #3
  %25 = load ptr, ptr %7, align 8, !tbaa !5
  %26 = load i64, ptr %8, align 8, !tbaa !9
  %27 = call i32 @getrandom_wrapper(ptr noundef %25, i64 noundef %26, i32 noundef 0)
  store i32 %27, ptr %12, align 4, !tbaa !11
  %28 = icmp slt i32 %27, 0
  br i1 %28, label %29, label %30

29:                                               ; preds = %24
  store i32 -60, ptr %5, align 4
  store i32 1, ptr %13, align 4
  br label %34

30:                                               ; preds = %24
  %31 = load i32, ptr %12, align 4, !tbaa !11
  %32 = sext i32 %31 to i64
  %33 = load ptr, ptr %9, align 8, !tbaa !5
  store i64 %32, ptr %33, align 8, !tbaa !9
  store i32 0, ptr %5, align 4
  store i32 1, ptr %13, align 4
  br label %34

34:                                               ; preds = %30, %29
  call void @llvm.lifetime.end.p0(i64 4, ptr %12) #3
  br label %57

35:                                               ; preds = %21
  %36 = load ptr, ptr %9, align 8, !tbaa !5
  store i64 0, ptr %36, align 8, !tbaa !9
  %37 = call noalias ptr @fopen(ptr noundef @.str, ptr noundef @.str.1)
  store ptr %37, ptr %10, align 8, !tbaa !5
  %38 = load ptr, ptr %10, align 8, !tbaa !5
  %39 = icmp eq ptr %38, null
  br i1 %39, label %40, label %41

40:                                               ; preds = %35
  store i32 -60, ptr %5, align 4
  store i32 1, ptr %13, align 4
  br label %57

41:                                               ; preds = %35
  %42 = load ptr, ptr %7, align 8, !tbaa !5
  %43 = load i64, ptr %8, align 8, !tbaa !9
  %44 = load ptr, ptr %10, align 8, !tbaa !5
  %45 = call i64 @fread(ptr noundef %42, i64 noundef 1, i64 noundef %43, ptr noundef %44)
  store i64 %45, ptr %11, align 8, !tbaa !9
  %46 = load i64, ptr %11, align 8, !tbaa !9
  %47 = load i64, ptr %8, align 8, !tbaa !9
  %48 = icmp ne i64 %46, %47
  br i1 %48, label %49, label %52

49:                                               ; preds = %41
  %50 = load ptr, ptr %10, align 8, !tbaa !5
  %51 = call i32 @fclose(ptr noundef %50)
  store i32 -60, ptr %5, align 4
  store i32 1, ptr %13, align 4
  br label %57

52:                                               ; preds = %41
  %53 = load ptr, ptr %10, align 8, !tbaa !5
  %54 = call i32 @fclose(ptr noundef %53)
  %55 = load i64, ptr %8, align 8, !tbaa !9
  %56 = load ptr, ptr %9, align 8, !tbaa !5
  store i64 %55, ptr %56, align 8, !tbaa !9
  store i32 0, ptr %5, align 4
  store i32 1, ptr %13, align 4
  br label %57

57:                                               ; preds = %52, %49, %40, %34
  call void @llvm.lifetime.end.p0(i64 8, ptr %11) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %10) #3
  %58 = load i32, ptr %5, align 4
  ret i32 %58
}

; 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 i32 @check_version_3_17_plus() #0

; Function Attrs: nounwind uwtable
declare hidden i32 @getrandom_wrapper(ptr noundef, i64 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

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

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

declare i32 @fclose(ptr noundef) #2

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 = { "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}
!11 = !{!12, !12, i64 0}
!12 = !{!"int", !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"

@has_getrandom = external hidden local_unnamed_addr global i32, align 4
@.str = external hidden unnamed_addr constant [13 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [3 x i8], align 1

; Function Attrs: nounwind uwtable
define dso_local range(i32 -60, 1) i32 @mbedtls_platform_entropy_poll(ptr nocapture noundef readnone %0, ptr noundef %1, i64 noundef %2, ptr nocapture noundef writeonly %3) local_unnamed_addr #0 {
  %5 = load i32, ptr @has_getrandom, align 4, !tbaa !5
  %6 = icmp eq i32 %5, -1
  br i1 %6, label %7, label %11

7:                                                ; preds = %4
  %8 = tail call i32 @check_version_3_17_plus()
  %9 = icmp eq i32 %8, 0
  %10 = zext i1 %9 to i32
  store i32 %10, ptr @has_getrandom, align 4, !tbaa !5
  br label %11

11:                                               ; preds = %7, %4
  %12 = phi i32 [ %10, %7 ], [ %5, %4 ]
  %.not = icmp eq i32 %12, 0
  br i1 %.not, label %18, label %13

13:                                               ; preds = %11
  %14 = tail call i32 @getrandom_wrapper(ptr noundef %1, i64 noundef %2, i32 noundef 0)
  %15 = icmp slt i32 %14, 0
  br i1 %15, label %24, label %16

16:                                               ; preds = %13
  %17 = zext nneg i32 %14 to i64
  br label %.sink.split

18:                                               ; preds = %11
  store i64 0, ptr %3, align 8, !tbaa !9
  %19 = tail call noalias ptr @fopen(ptr noundef nonnull @.str, ptr noundef nonnull @.str.1)
  %20 = icmp eq ptr %19, null
  br i1 %20, label %24, label %21

21:                                               ; preds = %18
  %22 = tail call i64 @fread(ptr noundef %1, i64 noundef 1, i64 noundef %2, ptr noundef nonnull %19)
  %.not19 = icmp eq i64 %22, %2
  %23 = tail call i32 @fclose(ptr noundef nonnull %19)
  br i1 %.not19, label %.sink.split, label %24

.sink.split:                                      ; preds = %21, %16
  %.sink = phi i64 [ %17, %16 ], [ %2, %21 ]
  store i64 %.sink, ptr %3, align 8, !tbaa !9
  br label %24

24:                                               ; preds = %.sink.split, %21, %18, %13
  %.1 = phi i32 [ -60, %13 ], [ -60, %18 ], [ -60, %21 ], [ 0, %.sink.split ]
  ret i32 %.1
}

; Function Attrs: nounwind uwtable
declare hidden i32 @check_version_3_17_plus() local_unnamed_addr #0

; Function Attrs: nounwind uwtable
declare hidden i32 @getrandom_wrapper(ptr noundef, i64 noundef, i32 noundef) local_unnamed_addr #0

; Function Attrs: nofree nounwind
declare noalias noundef ptr @fopen(ptr nocapture noundef readonly, ptr nocapture noundef readonly) local_unnamed_addr #1

; Function Attrs: nofree nounwind
declare noundef i64 @fread(ptr nocapture noundef, i64 noundef, i64 noundef, ptr nocapture noundef) local_unnamed_addr #1

; Function Attrs: nofree nounwind
declare noundef i32 @fclose(ptr nocapture noundef) local_unnamed_addr #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 = { 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" }

!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/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"long", !7, i64 0}


; Effective O3 passes: GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass