; LLVM IR from openssl/openssl :: crypto/evp (dh_support)

; 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.dh_name2id_st = type { ptr, i32, i32 }

@dhtype2id = external hidden constant [4 x %struct.dh_name2id_st], align 16

; Function Attrs: nounwind uwtable
define dso_local ptr @ossl_dh_gen_type_id2name(i32 noundef %0) #0 {
  %2 = alloca ptr, align 8
  %3 = alloca i32, align 4
  %4 = alloca i64, align 8
  %5 = alloca i32, align 4
  store i32 %0, ptr %3, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #2
  store i64 0, ptr %4, align 8, !tbaa !9
  br label %6

6:                                                ; preds = %22, %1
  %7 = load i64, ptr %4, align 8, !tbaa !9
  %8 = icmp ult i64 %7, 4
  br i1 %8, label %9, label %25

9:                                                ; preds = %6
  %10 = load i64, ptr %4, align 8, !tbaa !9
  %11 = getelementptr inbounds [4 x %struct.dh_name2id_st], ptr @dhtype2id, i64 0, i64 %10
  %12 = getelementptr inbounds %struct.dh_name2id_st, ptr %11, i32 0, i32 1
  %13 = load i32, ptr %12, align 8, !tbaa !11
  %14 = load i32, ptr %3, align 4, !tbaa !5
  %15 = icmp eq i32 %13, %14
  br i1 %15, label %16, label %21

16:                                               ; preds = %9
  %17 = load i64, ptr %4, align 8, !tbaa !9
  %18 = getelementptr inbounds [4 x %struct.dh_name2id_st], ptr @dhtype2id, i64 0, i64 %17
  %19 = getelementptr inbounds %struct.dh_name2id_st, ptr %18, i32 0, i32 0
  %20 = load ptr, ptr %19, align 16, !tbaa !14
  store ptr %20, ptr %2, align 8
  store i32 1, ptr %5, align 4
  br label %26

21:                                               ; preds = %9
  br label %22

22:                                               ; preds = %21
  %23 = load i64, ptr %4, align 8, !tbaa !9
  %24 = add i64 %23, 1
  store i64 %24, ptr %4, align 8, !tbaa !9
  br label %6, !llvm.loop !15

25:                                               ; preds = %6
  store ptr null, ptr %2, align 8
  store i32 1, ptr %5, align 4
  br label %26

26:                                               ; preds = %25, %16
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #2
  %27 = load ptr, ptr %2, align 8
  ret ptr %27
}

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #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 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { 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 = !{!"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}
!11 = !{!12, !6, i64 8}
!12 = !{!"dh_name2id_st", !13, i64 0, !6, i64 8, !6, i64 12}
!13 = !{!"any pointer", !7, i64 0}
!14 = !{!12, !13, i64 0}
!15 = distinct !{!15, !16}
!16 = !{!"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"

%struct.dh_name2id_st = type { ptr, i32, i32 }

@dhtype2id = external hidden local_unnamed_addr constant [4 x %struct.dh_name2id_st], align 16

; Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(none) uwtable
define dso_local ptr @ossl_dh_gen_type_id2name(i32 noundef %0) local_unnamed_addr #0 {
  %2 = load i32, ptr getelementptr inbounds (i8, ptr @dhtype2id, i64 8), align 8, !tbaa !5
  %3 = icmp eq i32 %2, %0
  br i1 %3, label %13, label %4

4:                                                ; preds = %1
  %5 = load i32, ptr getelementptr inbounds (i8, ptr @dhtype2id, i64 24), align 8, !tbaa !5
  %6 = icmp eq i32 %5, %0
  br i1 %6, label %13, label %7

7:                                                ; preds = %4
  %8 = load i32, ptr getelementptr inbounds (i8, ptr @dhtype2id, i64 40), align 8, !tbaa !5
  %9 = icmp eq i32 %8, %0
  br i1 %9, label %13, label %10

10:                                               ; preds = %7
  %11 = load i32, ptr getelementptr inbounds (i8, ptr @dhtype2id, i64 56), align 8, !tbaa !5
  %12 = icmp eq i32 %11, %0
  br i1 %12, label %13, label %.loopexit

13:                                               ; preds = %10, %7, %4, %1
  %.lcssa = phi ptr [ @dhtype2id, %1 ], [ getelementptr inbounds (i8, ptr @dhtype2id, i64 16), %4 ], [ getelementptr inbounds (i8, ptr @dhtype2id, i64 32), %7 ], [ getelementptr inbounds (i8, ptr @dhtype2id, i64 48), %10 ]
  %14 = load ptr, ptr %.lcssa, align 16, !tbaa !11
  br label %.loopexit

.loopexit:                                        ; preds = %10, %13
  %.05 = phi ptr [ %14, %13 ], [ null, %10 ]
  ret ptr %.05
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(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, !10, i64 8}
!6 = !{!"dh_name2id_st", !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 = !{!6, !7, i64 0}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass