; LLVM IR from bartobri/data-structures-c :: symbol-table/extendable-hashing (st)

; 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.STnode = type { [6 x ptr], i32, i32 }
%struct.anon = type { i32, i32 }

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

; 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 ptr @STsearchS(ptr noundef %0, i32 noundef %1) #1 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store i32 %1, ptr %5, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #2
  store i32 0, ptr %6, align 4, !tbaa !9
  br label %8

8:                                                ; preds = %33, %2
  %9 = load i32, ptr %6, align 4, !tbaa !9
  %10 = load ptr, ptr %4, align 8, !tbaa !5
  %11 = getelementptr inbounds %struct.STnode, ptr %10, i32 0, i32 1
  %12 = load i32, ptr %11, align 8, !tbaa !11
  %13 = icmp slt i32 %9, %12
  br i1 %13, label %14, label %36

14:                                               ; preds = %8
  %15 = load i32, ptr %5, align 4, !tbaa !9
  %16 = load ptr, ptr %4, align 8, !tbaa !5
  %17 = getelementptr inbounds %struct.STnode, ptr %16, i32 0, i32 0
  %18 = load i32, ptr %6, align 4, !tbaa !9
  %19 = sext i32 %18 to i64
  %20 = getelementptr inbounds [6 x ptr], ptr %17, i64 0, i64 %19
  %21 = load ptr, ptr %20, align 8, !tbaa !5
  %22 = getelementptr inbounds %struct.anon, ptr %21, i32 0, i32 0
  %23 = load i32, ptr %22, align 4, !tbaa !13
  %24 = icmp eq i32 %15, %23
  br i1 %24, label %25, label %32

25:                                               ; preds = %14
  %26 = load ptr, ptr %4, align 8, !tbaa !5
  %27 = getelementptr inbounds %struct.STnode, ptr %26, i32 0, i32 0
  %28 = load i32, ptr %6, align 4, !tbaa !9
  %29 = sext i32 %28 to i64
  %30 = getelementptr inbounds [6 x ptr], ptr %27, i64 0, i64 %29
  %31 = load ptr, ptr %30, align 8, !tbaa !5
  store ptr %31, ptr %3, align 8
  store i32 1, ptr %7, align 4
  br label %37

32:                                               ; preds = %14
  br label %33

33:                                               ; preds = %32
  %34 = load i32, ptr %6, align 4, !tbaa !9
  %35 = add nsw i32 %34, 1
  store i32 %35, ptr %6, align 4, !tbaa !9
  br label %8, !llvm.loop !15

36:                                               ; preds = %8
  store ptr null, ptr %3, align 8
  store i32 1, ptr %7, align 4
  br label %37

37:                                               ; preds = %36, %25
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #2
  %38 = load ptr, ptr %3, align 8
  ret ptr %38
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 = { 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, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = !{!12, !10, i64 48}
!12 = !{!"STnode", !7, i64 0, !10, i64 48, !10, i64 52}
!13 = !{!14, !10, i64 0}
!14 = !{!"", !10, i64 0, !10, i64 4}
!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"

; Function Attrs: nofree norecurse nosync nounwind memory(read, inaccessiblemem: none) uwtable
define dso_local noundef ptr @STsearchS(ptr nocapture noundef readonly %0, i32 noundef %1) local_unnamed_addr #0 {
  %3 = getelementptr inbounds i8, ptr %0, i64 48
  %4 = load i32, ptr %3, align 8, !tbaa !5
  %5 = icmp sgt i32 %4, 0
  br i1 %5, label %.lr.ph.preheader, label %._crit_edge

.lr.ph.preheader:                                 ; preds = %2
  %wide.trip.count = zext nneg i32 %4 to i64
  br label %.lr.ph

6:                                                ; preds = %.lr.ph
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %exitcond.not = icmp eq i64 %indvars.iv.next, %wide.trip.count
  br i1 %exitcond.not, label %._crit_edge, label %.lr.ph, !llvm.loop !10

.lr.ph:                                           ; preds = %.lr.ph.preheader, %6
  %indvars.iv = phi i64 [ 0, %.lr.ph.preheader ], [ %indvars.iv.next, %6 ]
  %7 = getelementptr inbounds [6 x ptr], ptr %0, i64 0, i64 %indvars.iv
  %8 = load ptr, ptr %7, align 8, !tbaa !12
  %9 = load i32, ptr %8, align 4, !tbaa !14
  %10 = icmp eq i32 %9, %1
  br i1 %10, label %._crit_edge, label %6

._crit_edge:                                      ; preds = %.lr.ph, %6, %2
  %.08 = phi ptr [ null, %2 ], [ null, %6 ], [ %8, %.lr.ph ]
  ret ptr %.08
}

attributes #0 = { nofree norecurse nosync nounwind 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, !9, i64 48}
!6 = !{!"STnode", !7, i64 0, !9, i64 48, !9, i64 52}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!"int", !7, i64 0}
!10 = distinct !{!10, !11}
!11 = !{!"llvm.loop.mustprogress"}
!12 = !{!13, !13, i64 0}
!13 = !{!"any pointer", !7, i64 0}
!14 = !{!15, !9, i64 0}
!15 = !{!"", !9, i64 0, !9, i64 4}


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