; LLVM IR from openssl/openssl :: crypto/evp (ec_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.ec_name2nid_st = type { ptr, i32 }

@curve_list = external hidden constant [82 x %struct.ec_name2nid_st], align 16

; Function Attrs: nounwind uwtable
define dso_local ptr @OSSL_EC_curve_nid2name(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
  %6 = load i32, ptr %3, align 4, !tbaa !5
  %7 = icmp sle i32 %6, 0
  br i1 %7, label %8, label %9

8:                                                ; preds = %1
  store ptr null, ptr %2, align 8
  store i32 1, ptr %5, align 4
  br label %30

9:                                                ; preds = %1
  store i64 0, ptr %4, align 8, !tbaa !9
  br label %10

10:                                               ; preds = %26, %9
  %11 = load i64, ptr %4, align 8, !tbaa !9
  %12 = icmp ult i64 %11, 82
  br i1 %12, label %13, label %29

13:                                               ; preds = %10
  %14 = load i64, ptr %4, align 8, !tbaa !9
  %15 = getelementptr inbounds [82 x %struct.ec_name2nid_st], ptr @curve_list, i64 0, i64 %14
  %16 = getelementptr inbounds %struct.ec_name2nid_st, ptr %15, i32 0, i32 1
  %17 = load i32, ptr %16, align 8, !tbaa !11
  %18 = load i32, ptr %3, align 4, !tbaa !5
  %19 = icmp eq i32 %17, %18
  br i1 %19, label %20, label %25

20:                                               ; preds = %13
  %21 = load i64, ptr %4, align 8, !tbaa !9
  %22 = getelementptr inbounds [82 x %struct.ec_name2nid_st], ptr @curve_list, i64 0, i64 %21
  %23 = getelementptr inbounds %struct.ec_name2nid_st, ptr %22, i32 0, i32 0
  %24 = load ptr, ptr %23, align 16, !tbaa !14
  store ptr %24, ptr %2, align 8
  store i32 1, ptr %5, align 4
  br label %30

25:                                               ; preds = %13
  br label %26

26:                                               ; preds = %25
  %27 = load i64, ptr %4, align 8, !tbaa !9
  %28 = add i64 %27, 1
  store i64 %28, ptr %4, align 8, !tbaa !9
  br label %10, !llvm.loop !15

29:                                               ; preds = %10
  store ptr null, ptr %2, align 8
  store i32 1, ptr %5, align 4
  br label %30

30:                                               ; preds = %29, %20, %8
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #2
  %31 = load ptr, ptr %2, align 8
  ret ptr %31
}

; 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 = !{!"ec_name2nid_st", !13, i64 0, !6, i64 8}
!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.ec_name2nid_st = type { ptr, i32 }

@curve_list = external hidden local_unnamed_addr constant [82 x %struct.ec_name2nid_st], align 16

; Function Attrs: nofree norecurse nosync nounwind memory(none) uwtable
define dso_local ptr @OSSL_EC_curve_nid2name(i32 noundef %0) local_unnamed_addr #0 {
  %2 = icmp slt i32 %0, 1
  br i1 %2, label %.loopexit, label %.preheader

.preheader.1:                                     ; preds = %.preheader
  %3 = or disjoint i64 %.08, 1
  %4 = getelementptr inbounds [82 x %struct.ec_name2nid_st], ptr @curve_list, i64 0, i64 %3
  %5 = getelementptr inbounds i8, ptr %4, i64 8
  %6 = load i32, ptr %5, align 8, !tbaa !5
  %7 = icmp eq i32 %6, %0
  br i1 %7, label %14, label %8

8:                                                ; preds = %.preheader.1
  %9 = add nuw nsw i64 %.08, 2
  %exitcond.not.1 = icmp eq i64 %9, 82
  br i1 %exitcond.not.1, label %.loopexit, label %.preheader, !llvm.loop !11

.preheader:                                       ; preds = %1, %8
  %.08 = phi i64 [ %9, %8 ], [ 0, %1 ]
  %10 = getelementptr inbounds [82 x %struct.ec_name2nid_st], ptr @curve_list, i64 0, i64 %.08
  %11 = getelementptr inbounds i8, ptr %10, i64 8
  %12 = load i32, ptr %11, align 8, !tbaa !5
  %13 = icmp eq i32 %12, %0
  br i1 %13, label %14, label %.preheader.1

14:                                               ; preds = %.preheader.1, %.preheader
  %.lcssa = phi ptr [ %10, %.preheader ], [ %4, %.preheader.1 ]
  %15 = load ptr, ptr %.lcssa, align 16, !tbaa !13
  br label %.loopexit

.loopexit:                                        ; preds = %8, %1, %14
  %.06 = phi ptr [ %15, %14 ], [ null, %1 ], [ null, %8 ]
  ret ptr %.06
}

attributes #0 = { nofree norecurse nosync nounwind 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 = !{!"ec_name2nid_st", !7, i64 0, !10, i64 8}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"int", !8, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}
!13 = !{!6, !7, i64 0}


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