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

; 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_ssl_cache_context = type { ptr, i32, i32 }
%struct.mbedtls_ssl_cache_entry = type { i64, %struct.mbedtls_ssl_session, %struct.mbedtls_asn1_buf, ptr }
%struct.mbedtls_ssl_session = type { i64, i32, i32, i64, [32 x i8], [48 x i8], ptr, i32, ptr, i64, i32, i8, i32, i32 }
%struct.mbedtls_asn1_buf = type { i32, i64, ptr }

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

; Function Attrs: nounwind
declare void @free(ptr noundef) #1

; 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
define dso_local void @mbedtls_ssl_cache_free(ptr noundef %0) #2 {
  %2 = alloca ptr, align 8
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  store ptr %0, ptr %2, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #4
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #4
  %5 = load ptr, ptr %2, align 8, !tbaa !5
  %6 = getelementptr inbounds %struct.mbedtls_ssl_cache_context, ptr %5, i32 0, i32 0
  %7 = load ptr, ptr %6, align 8, !tbaa !9
  store ptr %7, ptr %3, align 8, !tbaa !5
  br label %8

8:                                                ; preds = %11, %1
  %9 = load ptr, ptr %3, align 8, !tbaa !5
  %10 = icmp ne ptr %9, null
  br i1 %10, label %11, label %23

11:                                               ; preds = %8
  %12 = load ptr, ptr %3, align 8, !tbaa !5
  store ptr %12, ptr %4, align 8, !tbaa !5
  %13 = load ptr, ptr %3, align 8, !tbaa !5
  %14 = getelementptr inbounds %struct.mbedtls_ssl_cache_entry, ptr %13, i32 0, i32 3
  %15 = load ptr, ptr %14, align 8, !tbaa !12
  store ptr %15, ptr %3, align 8, !tbaa !5
  %16 = load ptr, ptr %4, align 8, !tbaa !5
  %17 = getelementptr inbounds %struct.mbedtls_ssl_cache_entry, ptr %16, i32 0, i32 1
  call void @mbedtls_ssl_session_free(ptr noundef %17)
  %18 = load ptr, ptr %4, align 8, !tbaa !5
  %19 = getelementptr inbounds %struct.mbedtls_ssl_cache_entry, ptr %18, i32 0, i32 2
  %20 = getelementptr inbounds %struct.mbedtls_asn1_buf, ptr %19, i32 0, i32 2
  %21 = load ptr, ptr %20, align 8, !tbaa !17
  call void @free(ptr noundef %21) #4
  %22 = load ptr, ptr %4, align 8, !tbaa !5
  call void @free(ptr noundef %22) #4
  br label %8, !llvm.loop !18

23:                                               ; preds = %8
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #4
  ret void
}

declare void @mbedtls_ssl_session_free(ptr noundef) #3

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #2 = { 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 #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, !6, i64 0}
!10 = !{!"mbedtls_ssl_cache_context", !6, i64 0, !11, i64 8, !11, i64 12}
!11 = !{!"int", !7, i64 0}
!12 = !{!13, !6, i64 184}
!13 = !{!"mbedtls_ssl_cache_entry", !14, i64 0, !15, i64 8, !16, i64 160, !6, i64 184}
!14 = !{!"long", !7, i64 0}
!15 = !{!"mbedtls_ssl_session", !14, i64 0, !11, i64 8, !11, i64 12, !14, i64 16, !7, i64 24, !7, i64 56, !6, i64 104, !11, i64 112, !6, i64 120, !14, i64 128, !11, i64 136, !7, i64 140, !11, i64 144, !11, i64 148}
!16 = !{!"mbedtls_asn1_buf", !11, i64 0, !14, i64 8, !6, i64 16}
!17 = !{!13, !6, i64 176}
!18 = distinct !{!18, !19}
!19 = !{!"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: mustprogress nounwind willreturn allockind("free") memory(argmem: readwrite, inaccessiblemem: readwrite)
declare void @free(ptr allocptr nocapture noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local void @mbedtls_ssl_cache_free(ptr nocapture noundef readonly %0) local_unnamed_addr #1 {
  %2 = load ptr, ptr %0, align 8, !tbaa !5
  %.not7 = icmp eq ptr %2, null
  br i1 %.not7, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %1, %.lr.ph
  %.08 = phi ptr [ %4, %.lr.ph ], [ %2, %1 ]
  %3 = getelementptr inbounds i8, ptr %.08, i64 184
  %4 = load ptr, ptr %3, align 8, !tbaa !11
  %5 = getelementptr inbounds i8, ptr %.08, i64 8
  tail call void @mbedtls_ssl_session_free(ptr noundef nonnull %5) #3
  %6 = getelementptr inbounds i8, ptr %.08, i64 176
  %7 = load ptr, ptr %6, align 8, !tbaa !16
  tail call void @free(ptr noundef %7) #3
  tail call void @free(ptr noundef nonnull %.08) #3
  %.not = icmp eq ptr %4, null
  br i1 %.not, label %._crit_edge, label %.lr.ph, !llvm.loop !17

._crit_edge:                                      ; preds = %.lr.ph, %1
  ret void
}

declare void @mbedtls_ssl_session_free(ptr noundef) local_unnamed_addr #2

attributes #0 = { mustprogress nounwind willreturn allockind("free") memory(argmem: readwrite, inaccessiblemem: readwrite) "alloc-family"="malloc" "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 = { 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, !7, i64 0}
!6 = !{!"mbedtls_ssl_cache_context", !7, i64 0, !10, i64 8, !10, i64 12}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"int", !8, i64 0}
!11 = !{!12, !7, i64 184}
!12 = !{!"mbedtls_ssl_cache_entry", !13, i64 0, !14, i64 8, !15, i64 160, !7, i64 184}
!13 = !{!"long", !8, i64 0}
!14 = !{!"mbedtls_ssl_session", !13, i64 0, !10, i64 8, !10, i64 12, !13, i64 16, !8, i64 24, !8, i64 56, !7, i64 104, !10, i64 112, !7, i64 120, !13, i64 128, !10, i64 136, !8, i64 140, !10, i64 144, !10, i64 148}
!15 = !{!"mbedtls_asn1_buf", !10, i64 0, !13, i64 8, !7, i64 16}
!16 = !{!12, !7, i64 176}
!17 = distinct !{!17, !18}
!18 = !{!"llvm.loop.mustprogress"}


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