; LLVM IR from zumrudu-anka/Algorithms :: C++/Searching Algorithms/Sequential(Linear) Search (UnorderedList)

; 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"

; Function Attrs: mustprogress uwtable
define dso_local noundef ptr @_Z17sequential_searchPiii(ptr noundef %0, i32 noundef %1, i32 noundef %2) #0 {
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  %8 = alloca ptr, align 8
  %9 = alloca i32, align 4
  %10 = alloca i32, align 4
  store ptr %0, ptr %5, align 8, !tbaa !5
  store i32 %1, ptr %6, align 4, !tbaa !9
  store i32 %2, ptr %7, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #3
  %11 = call noalias noundef nonnull ptr @_Znam(i64 noundef 8) #4
  store ptr %11, ptr %8, align 8, !tbaa !5
  %12 = load ptr, ptr %8, align 8, !tbaa !5
  %13 = getelementptr inbounds i32, ptr %12, i64 0
  store i32 0, ptr %13, align 4, !tbaa !9
  %14 = load ptr, ptr %8, align 8, !tbaa !5
  %15 = getelementptr inbounds i32, ptr %14, i64 1
  store i32 -1, ptr %15, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #3
  store i32 0, ptr %9, align 4, !tbaa !9
  br label %16

16:                                               ; preds = %38, %3
  %17 = load i32, ptr %9, align 4, !tbaa !9
  %18 = load i32, ptr %6, align 4, !tbaa !9
  %19 = icmp slt i32 %17, %18
  br i1 %19, label %21, label %20

20:                                               ; preds = %16
  store i32 2, ptr %10, align 4
  br label %41

21:                                               ; preds = %16
  %22 = load ptr, ptr %5, align 8, !tbaa !5
  %23 = load i32, ptr %9, align 4, !tbaa !9
  %24 = sext i32 %23 to i64
  %25 = getelementptr inbounds i32, ptr %22, i64 %24
  %26 = load i32, ptr %25, align 4, !tbaa !9
  %27 = load i32, ptr %7, align 4, !tbaa !9
  %28 = icmp eq i32 %26, %27
  br i1 %28, label %29, label %37

29:                                               ; preds = %21
  %30 = load ptr, ptr %8, align 8, !tbaa !5
  %31 = getelementptr inbounds i32, ptr %30, i64 0
  store i32 1, ptr %31, align 4, !tbaa !9
  %32 = load i32, ptr %9, align 4, !tbaa !9
  %33 = add nsw i32 %32, 1
  %34 = load ptr, ptr %8, align 8, !tbaa !5
  %35 = getelementptr inbounds i32, ptr %34, i64 1
  store i32 %33, ptr %35, align 4, !tbaa !9
  %36 = load ptr, ptr %8, align 8, !tbaa !5
  store ptr %36, ptr %4, align 8
  store i32 1, ptr %10, align 4
  br label %41

37:                                               ; preds = %21
  br label %38

38:                                               ; preds = %37
  %39 = load i32, ptr %9, align 4, !tbaa !9
  %40 = add nsw i32 %39, 1
  store i32 %40, ptr %9, align 4, !tbaa !9
  br label %16, !llvm.loop !11

41:                                               ; preds = %29, %20
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #3
  %42 = load i32, ptr %10, align 4
  switch i32 %42, label %45 [
    i32 2, label %43
  ]

43:                                               ; preds = %41
  %44 = load ptr, ptr %8, align 8, !tbaa !5
  store ptr %44, ptr %4, align 8
  store i32 1, ptr %10, align 4
  br label %45

45:                                               ; preds = %43, %41
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #3
  %46 = load ptr, ptr %4, align 8
  ret ptr %46
}

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

; Function Attrs: nobuiltin allocsize(0)
declare noundef nonnull ptr @_Znam(i64 noundef) #2

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

attributes #0 = { mustprogress 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 = { nobuiltin allocsize(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 #3 = { nounwind }
attributes #4 = { builtin allocsize(0) }

!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++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"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: mustprogress uwtable
define dso_local noalias noundef nonnull ptr @_Z17sequential_searchPiii(ptr nocapture noundef readonly %0, i32 noundef %1, i32 noundef %2) local_unnamed_addr #0 {
  %4 = tail call noalias noundef nonnull dereferenceable(8) ptr @_Znam(i64 noundef 8) #2
  store i32 0, ptr %4, align 4, !tbaa !5
  %5 = getelementptr inbounds i8, ptr %4, i64 4
  store i32 -1, ptr %5, align 4, !tbaa !5
  %.not17 = icmp sgt i32 %1, 0
  br i1 %.not17, label %.lr.ph.preheader, label %.critedge

.lr.ph.preheader:                                 ; preds = %3
  %wide.trip.count = zext nneg i32 %1 to i64
  br label %.lr.ph

.lr.ph:                                           ; preds = %.lr.ph.preheader, %12
  %indvars.iv = phi i64 [ 0, %.lr.ph.preheader ], [ %indvars.iv.next, %12 ]
  %6 = getelementptr inbounds i32, ptr %0, i64 %indvars.iv
  %7 = load i32, ptr %6, align 4, !tbaa !5
  %8 = icmp eq i32 %7, %2
  br i1 %8, label %9, label %12

9:                                                ; preds = %.lr.ph
  %10 = trunc nuw nsw i64 %indvars.iv to i32
  store i32 1, ptr %4, align 4, !tbaa !5
  %11 = add nuw nsw i32 %10, 1
  store i32 %11, ptr %5, align 4, !tbaa !5
  br label %.critedge

12:                                               ; 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 %.critedge, label %.lr.ph, !llvm.loop !9

.critedge:                                        ; preds = %12, %3, %9
  ret ptr %4
}

; Function Attrs: nobuiltin allocsize(0)
declare noundef nonnull ptr @_Znam(i64 noundef) local_unnamed_addr #1

attributes #0 = { mustprogress 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 = { nobuiltin allocsize(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 = { builtin allocsize(0) }

!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++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}


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