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

; 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.mbedtls_hmac_drbg_context = type { %struct.mbedtls_md_context_t, [64 x i8], i32, i64, i32, i32, ptr, ptr }
%struct.mbedtls_md_context_t = type { ptr, ptr, ptr }

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #0

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

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #2

declare zeroext i8 @mbedtls_md_get_size(ptr noundef) #3

declare i32 @mbedtls_md_hmac_starts(ptr noundef, ptr noundef, i64 noundef) #3

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #2

; Function Attrs: nounwind uwtable
define dso_local i32 @mbedtls_hmac_drbg_seed_buf(ptr noundef %0, ptr noundef %1, ptr noundef %2, i64 noundef %3) #1 {
  %5 = alloca i32, align 4
  %6 = alloca ptr, align 8
  %7 = alloca ptr, align 8
  %8 = alloca ptr, align 8
  %9 = alloca i64, align 8
  %10 = alloca i32, align 4
  %11 = alloca i32, align 4
  store ptr %0, ptr %6, align 8, !tbaa !5
  store ptr %1, ptr %7, align 8, !tbaa !5
  store ptr %2, ptr %8, align 8, !tbaa !5
  store i64 %3, ptr %9, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %10) #4
  %12 = load ptr, ptr %6, align 8, !tbaa !5
  %13 = getelementptr inbounds %struct.mbedtls_hmac_drbg_context, ptr %12, i32 0, i32 0
  %14 = load ptr, ptr %7, align 8, !tbaa !5
  %15 = call i32 @mbedtls_md_setup(ptr noundef %13, ptr noundef %14, i32 noundef 1)
  store i32 %15, ptr %10, align 4, !tbaa !11
  %16 = icmp ne i32 %15, 0
  br i1 %16, label %17, label %19

17:                                               ; preds = %4
  %18 = load i32, ptr %10, align 4, !tbaa !11
  store i32 %18, ptr %5, align 4
  store i32 1, ptr %11, align 4
  br label %38

19:                                               ; preds = %4
  %20 = load ptr, ptr %6, align 8, !tbaa !5
  %21 = getelementptr inbounds %struct.mbedtls_hmac_drbg_context, ptr %20, i32 0, i32 0
  %22 = load ptr, ptr %6, align 8, !tbaa !5
  %23 = getelementptr inbounds %struct.mbedtls_hmac_drbg_context, ptr %22, i32 0, i32 1
  %24 = getelementptr inbounds [64 x i8], ptr %23, i64 0, i64 0
  %25 = load ptr, ptr %7, align 8, !tbaa !5
  %26 = call zeroext i8 @mbedtls_md_get_size(ptr noundef %25)
  %27 = zext i8 %26 to i64
  %28 = call i32 @mbedtls_md_hmac_starts(ptr noundef %21, ptr noundef %24, i64 noundef %27)
  %29 = load ptr, ptr %6, align 8, !tbaa !5
  %30 = getelementptr inbounds %struct.mbedtls_hmac_drbg_context, ptr %29, i32 0, i32 1
  %31 = getelementptr inbounds [64 x i8], ptr %30, i64 0, i64 0
  %32 = load ptr, ptr %7, align 8, !tbaa !5
  %33 = call zeroext i8 @mbedtls_md_get_size(ptr noundef %32)
  %34 = zext i8 %33 to i64
  call void @llvm.memset.p0.i64(ptr align 8 %31, i8 1, i64 %34, i1 false)
  %35 = load ptr, ptr %6, align 8, !tbaa !5
  %36 = load ptr, ptr %8, align 8, !tbaa !5
  %37 = load i64, ptr %9, align 8, !tbaa !9
  call void @mbedtls_hmac_drbg_update(ptr noundef %35, ptr noundef %36, i64 noundef %37)
  store i32 0, ptr %5, align 4
  store i32 1, ptr %11, align 4
  br label %38

38:                                               ; preds = %19, %17
  call void @llvm.lifetime.end.p0(i64 4, ptr %10) #4
  %39 = load i32, ptr %5, align 4
  ret i32 %39
}

declare i32 @mbedtls_md_setup(ptr noundef, ptr noundef, i32 noundef) #3

attributes #0 = { nocallback nofree nounwind willreturn memory(argmem: write) }
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 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #3 = { "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/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"

; Function Attrs: mustprogress nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #0

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

declare zeroext i8 @mbedtls_md_get_size(ptr noundef) local_unnamed_addr #2

declare i32 @mbedtls_md_hmac_starts(ptr noundef, ptr noundef, i64 noundef) local_unnamed_addr #2

; Function Attrs: nounwind uwtable
define dso_local i32 @mbedtls_hmac_drbg_seed_buf(ptr noundef %0, ptr noundef %1, ptr noundef %2, i64 noundef %3) local_unnamed_addr #1 {
  %5 = tail call i32 @mbedtls_md_setup(ptr noundef %0, ptr noundef %1, i32 noundef 1) #3
  %.not = icmp eq i32 %5, 0
  br i1 %.not, label %6, label %13

6:                                                ; preds = %4
  %7 = getelementptr inbounds i8, ptr %0, i64 24
  %8 = tail call zeroext i8 @mbedtls_md_get_size(ptr noundef %1) #3
  %9 = zext i8 %8 to i64
  %10 = tail call i32 @mbedtls_md_hmac_starts(ptr noundef %0, ptr noundef nonnull %7, i64 noundef %9) #3
  %11 = tail call zeroext i8 @mbedtls_md_get_size(ptr noundef %1) #3
  %12 = zext i8 %11 to i64
  tail call void @llvm.memset.p0.i64(ptr nonnull align 8 %7, i8 1, i64 %12, i1 false)
  tail call void @mbedtls_hmac_drbg_update(ptr noundef %0, ptr noundef %2, i64 noundef %3)
  br label %13

13:                                               ; preds = %4, %6
  ret i32 %5
}

declare i32 @mbedtls_md_setup(ptr noundef, ptr noundef, i32 noundef) local_unnamed_addr #2

attributes #0 = { mustprogress nocallback nofree nounwind willreturn memory(argmem: write) }
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)"}


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