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

; 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_ecp_curve_info = type { i32, i16, i16, ptr }

; Function Attrs: nounwind uwtable
declare dso_local ptr @mbedtls_ecp_curve_list() #0

; 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

; Function Attrs: nounwind uwtable
define dso_local ptr @mbedtls_ecp_curve_info_from_name(ptr noundef %0) #0 {
  %2 = alloca ptr, align 8
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #3
  %6 = call ptr @mbedtls_ecp_curve_list()
  store ptr %6, ptr %4, align 8, !tbaa !5
  br label %7

7:                                                ; preds = %22, %1
  %8 = load ptr, ptr %4, align 8, !tbaa !5
  %9 = getelementptr inbounds %struct.mbedtls_ecp_curve_info, ptr %8, i32 0, i32 0
  %10 = load i32, ptr %9, align 8, !tbaa !9
  %11 = icmp ne i32 %10, 0
  br i1 %11, label %12, label %25

12:                                               ; preds = %7
  %13 = load ptr, ptr %4, align 8, !tbaa !5
  %14 = getelementptr inbounds %struct.mbedtls_ecp_curve_info, ptr %13, i32 0, i32 3
  %15 = load ptr, ptr %14, align 8, !tbaa !13
  %16 = load ptr, ptr %3, align 8, !tbaa !5
  %17 = call i32 @strcmp(ptr noundef %15, ptr noundef %16) #4
  %18 = icmp eq i32 %17, 0
  br i1 %18, label %19, label %21

19:                                               ; preds = %12
  %20 = load ptr, ptr %4, align 8, !tbaa !5
  store ptr %20, ptr %2, align 8
  store i32 1, ptr %5, align 4
  br label %26

21:                                               ; preds = %12
  br label %22

22:                                               ; preds = %21
  %23 = load ptr, ptr %4, align 8, !tbaa !5
  %24 = getelementptr inbounds %struct.mbedtls_ecp_curve_info, ptr %23, i32 1
  store ptr %24, ptr %4, align 8, !tbaa !5
  br label %7, !llvm.loop !14

25:                                               ; preds = %7
  store ptr null, ptr %2, align 8
  store i32 1, ptr %5, align 4
  br label %26

26:                                               ; preds = %25, %19
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #3
  %27 = load ptr, ptr %2, align 8
  ret ptr %27
}

; Function Attrs: nounwind willreturn memory(read)
declare i32 @strcmp(ptr noundef, ptr noundef) #2

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 willreturn memory(read) "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 }
attributes #4 = { nounwind willreturn memory(read) }

!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, !11, i64 0}
!10 = !{!"", !11, i64 0, !12, i64 4, !12, i64 6, !6, i64 8}
!11 = !{!"int", !7, i64 0}
!12 = !{!"short", !7, i64 0}
!13 = !{!10, !6, i64 8}
!14 = distinct !{!14, !15}
!15 = !{!"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: nounwind uwtable
declare dso_local ptr @mbedtls_ecp_curve_list() local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local noundef ptr @mbedtls_ecp_curve_info_from_name(ptr nocapture noundef readonly %0) local_unnamed_addr #0 {
  %2 = tail call ptr @mbedtls_ecp_curve_list()
  %3 = load i32, ptr %2, align 8, !tbaa !5
  %.not7 = icmp eq i32 %3, 0
  br i1 %.not7, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %1, %8
  %.08 = phi ptr [ %9, %8 ], [ %2, %1 ]
  %4 = getelementptr inbounds i8, ptr %.08, i64 8
  %5 = load ptr, ptr %4, align 8, !tbaa !12
  %6 = tail call i32 @strcmp(ptr noundef nonnull dereferenceable(1) %5, ptr noundef nonnull dereferenceable(1) %0) #2
  %7 = icmp eq i32 %6, 0
  br i1 %7, label %._crit_edge, label %8

8:                                                ; preds = %.lr.ph
  %9 = getelementptr inbounds i8, ptr %.08, i64 16
  %10 = load i32, ptr %9, align 8, !tbaa !5
  %.not = icmp eq i32 %10, 0
  br i1 %.not, label %._crit_edge, label %.lr.ph, !llvm.loop !13

._crit_edge:                                      ; preds = %.lr.ph, %8, %1
  %.06 = phi ptr [ null, %1 ], [ null, %8 ], [ %.08, %.lr.ph ]
  ret ptr %.06
}

; Function Attrs: mustprogress nofree nounwind willreturn memory(argmem: read)
declare i32 @strcmp(ptr nocapture noundef, ptr nocapture noundef) local_unnamed_addr #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 = { mustprogress nofree nounwind willreturn memory(argmem: read) "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 willreturn memory(read) }

!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 = !{!"", !7, i64 0, !10, i64 4, !10, i64 6, !11, i64 8}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"short", !8, i64 0}
!11 = !{!"any pointer", !8, i64 0}
!12 = !{!6, !11, i64 8}
!13 = distinct !{!13, !14}
!14 = !{!"llvm.loop.mustprogress"}


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