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

; 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_context = type { ptr, i32, i32, i32, i32, i32, i32, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, i32, i64, i64, i16, i64, i64, i64, i64, i32, i32, ptr, ptr, ptr, ptr, ptr, ptr, i32, i64, i64, i8, i32, ptr, ptr, ptr, i64, i32, i64, [12 x i8], [12 x i8] }
%struct.mbedtls_ssl_config = type { [4 x ptr], ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, %struct.mbedtls_mpi, %struct.mbedtls_mpi, ptr, i64, ptr, i64, ptr, i32, i32, i32, i32, [8 x i8], i32, i32, i8, i8, i8, i8, i32 }
%struct.mbedtls_mpi = type { i32, i64, ptr }

@.str.122 = external hidden unnamed_addr constant [9 x i8], align 1
@.str.123 = external hidden unnamed_addr constant [9 x i8], align 1
@.str.124 = external hidden unnamed_addr constant [15 x i8], align 1
@.str.125 = external hidden unnamed_addr constant [8 x i8], align 1
@.str.126 = external hidden unnamed_addr constant [8 x i8], align 1
@.str.127 = external hidden unnamed_addr constant [8 x i8], align 1
@.str.128 = external hidden unnamed_addr constant [8 x i8], align 1
@.str.129 = external hidden unnamed_addr constant [8 x i8], align 1

; Function Attrs: nounwind uwtable
define dso_local ptr @mbedtls_ssl_get_version(ptr noundef %0) #0 {
  %2 = alloca ptr, align 8
  %3 = alloca ptr, align 8
  store ptr %0, ptr %3, align 8, !tbaa !5
  %4 = load ptr, ptr %3, align 8, !tbaa !5
  %5 = getelementptr inbounds %struct.mbedtls_ssl_context, ptr %4, i32 0, i32 0
  %6 = load ptr, ptr %5, align 8, !tbaa !9
  %7 = getelementptr inbounds %struct.mbedtls_ssl_config, ptr %6, i32 0, i32 46
  %8 = load i32, ptr %7, align 4
  %9 = lshr i32 %8, 1
  %10 = and i32 %9, 1
  %11 = icmp eq i32 %10, 1
  br i1 %11, label %12, label %19

12:                                               ; preds = %1
  %13 = load ptr, ptr %3, align 8, !tbaa !5
  %14 = getelementptr inbounds %struct.mbedtls_ssl_context, ptr %13, i32 0, i32 5
  %15 = load i32, ptr %14, align 8, !tbaa !14
  switch i32 %15, label %18 [
    i32 2, label %16
    i32 3, label %17
  ]

16:                                               ; preds = %12
  store ptr @.str.122, ptr %2, align 8
  br label %28

17:                                               ; preds = %12
  store ptr @.str.123, ptr %2, align 8
  br label %28

18:                                               ; preds = %12
  store ptr @.str.124, ptr %2, align 8
  br label %28

19:                                               ; preds = %1
  %20 = load ptr, ptr %3, align 8, !tbaa !5
  %21 = getelementptr inbounds %struct.mbedtls_ssl_context, ptr %20, i32 0, i32 5
  %22 = load i32, ptr %21, align 8, !tbaa !14
  switch i32 %22, label %27 [
    i32 0, label %23
    i32 1, label %24
    i32 2, label %25
    i32 3, label %26
  ]

23:                                               ; preds = %19
  store ptr @.str.125, ptr %2, align 8
  br label %28

24:                                               ; preds = %19
  store ptr @.str.126, ptr %2, align 8
  br label %28

25:                                               ; preds = %19
  store ptr @.str.127, ptr %2, align 8
  br label %28

26:                                               ; preds = %19
  store ptr @.str.128, ptr %2, align 8
  br label %28

27:                                               ; preds = %19
  store ptr @.str.129, ptr %2, align 8
  br label %28

28:                                               ; preds = %27, %26, %25, %24, %23, %18, %17, %16
  %29 = load ptr, ptr %2, align 8
  ret ptr %29
}

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, !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_context", !6, i64 0, !11, i64 8, !11, i64 12, !11, i64 16, !11, i64 20, !11, i64 24, !11, i64 28, !6, i64 32, !6, i64 40, !6, i64 48, !6, i64 56, !6, i64 64, !6, i64 72, !6, i64 80, !6, i64 88, !6, i64 96, !6, i64 104, !6, i64 112, !6, i64 120, !6, i64 128, !6, i64 136, !6, i64 144, !6, i64 152, !6, i64 160, !6, i64 168, !6, i64 176, !6, i64 184, !6, i64 192, !6, i64 200, !6, i64 208, !11, i64 216, !12, i64 224, !12, i64 232, !13, i64 240, !12, i64 248, !12, i64 256, !12, i64 264, !12, i64 272, !11, i64 280, !11, i64 284, !6, i64 288, !6, i64 296, !6, i64 304, !6, i64 312, !6, i64 320, !6, i64 328, !11, i64 336, !12, i64 344, !12, i64 352, !7, i64 360, !11, i64 364, !6, i64 368, !6, i64 376, !6, i64 384, !12, i64 392, !11, i64 400, !12, i64 408, !7, i64 416, !7, i64 428}
!11 = !{!"int", !7, i64 0}
!12 = !{!"long", !7, i64 0}
!13 = !{!"short", !7, i64 0}
!14 = !{!10, !11, i64 24}


; 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.122 = external hidden unnamed_addr constant [9 x i8], align 1
@.str.123 = external hidden unnamed_addr constant [9 x i8], align 1
@.str.124 = external hidden unnamed_addr constant [15 x i8], align 1
@.str.125 = external hidden unnamed_addr constant [8 x i8], align 1
@.str.126 = external hidden unnamed_addr constant [8 x i8], align 1
@.str.127 = external hidden unnamed_addr constant [8 x i8], align 1
@.str.128 = external hidden unnamed_addr constant [8 x i8], align 1
@.str.129 = external hidden unnamed_addr constant [8 x i8], align 1
@switch.table.mbedtls_ssl_get_version = private unnamed_addr constant [4 x ptr] [ptr @.str.125, ptr @.str.126, ptr @.str.127, ptr @.str.128], align 8

; Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(read, inaccessiblemem: none) uwtable
define dso_local nonnull ptr @mbedtls_ssl_get_version(ptr nocapture noundef readonly %0) local_unnamed_addr #0 {
  %2 = load ptr, ptr %0, align 8, !tbaa !5
  %3 = getelementptr inbounds i8, ptr %2, i64 372
  %4 = load i32, ptr %3, align 4
  %5 = and i32 %4, 2
  %.not = icmp eq i32 %5, 0
  %6 = getelementptr inbounds i8, ptr %0, i64 24
  %7 = load i32, ptr %6, align 8, !tbaa !13
  br i1 %.not, label %9, label %8

8:                                                ; preds = %1
  %switch.selectcmp = icmp eq i32 %7, 3
  %switch.select = select i1 %switch.selectcmp, ptr @.str.123, ptr @.str.124
  %switch.selectcmp4 = icmp eq i32 %7, 2
  %switch.select5 = select i1 %switch.selectcmp4, ptr @.str.122, ptr %switch.select
  br label %12

9:                                                ; preds = %1
  %10 = icmp ult i32 %7, 4
  br i1 %10, label %switch.lookup, label %12

switch.lookup:                                    ; preds = %9
  %11 = zext nneg i32 %7 to i64
  %switch.gep = getelementptr inbounds [4 x ptr], ptr @switch.table.mbedtls_ssl_get_version, i64 0, i64 %11
  %switch.load = load ptr, ptr %switch.gep, align 8
  br label %12

12:                                               ; preds = %9, %switch.lookup, %8
  %.0 = phi ptr [ %switch.select5, %8 ], [ %switch.load, %switch.lookup ], [ @.str.129, %9 ]
  ret ptr %.0
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(read, inaccessiblemem: none) 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, !7, i64 0}
!6 = !{!"mbedtls_ssl_context", !7, i64 0, !10, i64 8, !10, i64 12, !10, i64 16, !10, i64 20, !10, i64 24, !10, i64 28, !7, i64 32, !7, i64 40, !7, i64 48, !7, i64 56, !7, i64 64, !7, i64 72, !7, i64 80, !7, i64 88, !7, i64 96, !7, i64 104, !7, i64 112, !7, i64 120, !7, i64 128, !7, i64 136, !7, i64 144, !7, i64 152, !7, i64 160, !7, i64 168, !7, i64 176, !7, i64 184, !7, i64 192, !7, i64 200, !7, i64 208, !10, i64 216, !11, i64 224, !11, i64 232, !12, i64 240, !11, i64 248, !11, i64 256, !11, i64 264, !11, i64 272, !10, i64 280, !10, i64 284, !7, i64 288, !7, i64 296, !7, i64 304, !7, i64 312, !7, i64 320, !7, i64 328, !10, i64 336, !11, i64 344, !11, i64 352, !8, i64 360, !10, i64 364, !7, i64 368, !7, i64 376, !7, i64 384, !11, i64 392, !10, i64 400, !11, i64 408, !8, i64 416, !8, i64 428}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"int", !8, i64 0}
!11 = !{!"long", !8, i64 0}
!12 = !{!"short", !8, i64 0}
!13 = !{!6, !10, i64 24}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,InstCombinePass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass