; LLVM IR from MostafaTwfiq/C-DataStructures-And-Algorithms :: Algorithms/Searching/Sources (LinearSearch)

; 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"

@stderr = external global ptr, align 8
@.str = external hidden unnamed_addr constant [31 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [13 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [14 x i8], align 1
@.str.3 = external hidden unnamed_addr constant [42 x i8], align 1
@.str.4 = external hidden unnamed_addr constant [14 x i8], align 1
@.str.5 = external hidden unnamed_addr constant [28 x i8], align 1
@.str.6 = external hidden unnamed_addr constant [13 x i8], align 1
@.str.7 = external hidden unnamed_addr constant [13 x i8], align 1

; 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
declare i32 @fprintf(ptr noundef, ptr noundef, ...) #1

; Function Attrs: noreturn nounwind
declare void @exit(i32 noundef) #2

; Function Attrs: nounwind uwtable
define dso_local i32 @linearSearchGetLast(ptr noundef %0, ptr noundef %1, i32 noundef %2, i32 noundef %3, ptr noundef %4) #3 {
  %6 = alloca i32, align 4
  %7 = alloca ptr, align 8
  %8 = alloca ptr, align 8
  %9 = alloca i32, align 4
  %10 = alloca i32, align 4
  %11 = alloca ptr, align 8
  %12 = alloca ptr, align 8
  %13 = alloca i32, align 4
  %14 = alloca i32, align 4
  store ptr %0, ptr %7, align 8, !tbaa !5
  store ptr %1, ptr %8, align 8, !tbaa !5
  store i32 %2, ptr %9, align 4, !tbaa !9
  store i32 %3, ptr %10, align 4, !tbaa !9
  store ptr %4, ptr %11, align 8, !tbaa !5
  %15 = load ptr, ptr %7, align 8, !tbaa !5
  %16 = icmp eq ptr %15, null
  br i1 %16, label %17, label %20

17:                                               ; preds = %5
  %18 = load ptr, ptr @stderr, align 8, !tbaa !5
  %19 = call i32 (ptr, ptr, ...) @fprintf(ptr noundef %18, ptr noundef @.str, ptr noundef @.str.1, ptr noundef @.str.2) #4
  call void @exit(i32 noundef -83386157) #5
  unreachable

20:                                               ; preds = %5
  %21 = load ptr, ptr %8, align 8, !tbaa !5
  %22 = icmp eq ptr %21, null
  br i1 %22, label %23, label %26

23:                                               ; preds = %20
  %24 = load ptr, ptr @stderr, align 8, !tbaa !5
  %25 = call i32 (ptr, ptr, ...) @fprintf(ptr noundef %24, ptr noundef @.str.3, ptr noundef @.str.4, ptr noundef @.str.2) #4
  call void @exit(i32 noundef -83384987) #5
  unreachable

26:                                               ; preds = %20
  %27 = load ptr, ptr %11, align 8, !tbaa !5
  %28 = icmp eq ptr %27, null
  br i1 %28, label %29, label %32

29:                                               ; preds = %26
  %30 = load ptr, ptr @stderr, align 8, !tbaa !5
  %31 = call i32 (ptr, ptr, ...) @fprintf(ptr noundef %30, ptr noundef @.str.3, ptr noundef @.str.5, ptr noundef @.str.2) #4
  call void @exit(i32 noundef -83384987) #5
  unreachable

32:                                               ; preds = %26
  %33 = load i32, ptr %9, align 4, !tbaa !9
  %34 = icmp slt i32 %33, 0
  br i1 %34, label %35, label %38

35:                                               ; preds = %32
  %36 = load ptr, ptr @stderr, align 8, !tbaa !5
  %37 = call i32 (ptr, ptr, ...) @fprintf(ptr noundef %36, ptr noundef @.str.3, ptr noundef @.str.6, ptr noundef @.str.2) #4
  call void @exit(i32 noundef -83384987) #5
  unreachable

38:                                               ; preds = %32
  %39 = load i32, ptr %10, align 4, !tbaa !9
  %40 = icmp sle i32 %39, 0
  br i1 %40, label %41, label %44

41:                                               ; preds = %38
  %42 = load ptr, ptr @stderr, align 8, !tbaa !5
  %43 = call i32 (ptr, ptr, ...) @fprintf(ptr noundef %42, ptr noundef @.str.3, ptr noundef @.str.7, ptr noundef @.str.2) #4
  call void @exit(i32 noundef -83384987) #5
  unreachable

44:                                               ; preds = %38
  br label %45

45:                                               ; preds = %44
  br label %46

46:                                               ; preds = %45
  br label %47

47:                                               ; preds = %46
  br label %48

48:                                               ; preds = %47
  call void @llvm.lifetime.start.p0(i64 8, ptr %12) #4
  %49 = load ptr, ptr %7, align 8, !tbaa !5
  store ptr %49, ptr %12, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %13) #4
  %50 = load i32, ptr %9, align 4, !tbaa !9
  %51 = sub nsw i32 %50, 1
  store i32 %51, ptr %13, align 4, !tbaa !9
  br label %52

52:                                               ; preds = %70, %48
  %53 = load i32, ptr %13, align 4, !tbaa !9
  %54 = icmp sge i32 %53, 0
  br i1 %54, label %56, label %55

55:                                               ; preds = %52
  store i32 2, ptr %14, align 4
  br label %73

56:                                               ; preds = %52
  %57 = load ptr, ptr %11, align 8, !tbaa !5
  %58 = load ptr, ptr %8, align 8, !tbaa !5
  %59 = load ptr, ptr %12, align 8, !tbaa !5
  %60 = load i32, ptr %13, align 4, !tbaa !9
  %61 = load i32, ptr %10, align 4, !tbaa !9
  %62 = mul nsw i32 %60, %61
  %63 = sext i32 %62 to i64
  %64 = getelementptr inbounds i8, ptr %59, i64 %63
  %65 = call i32 %57(ptr noundef %58, ptr noundef %64)
  %66 = icmp eq i32 %65, 0
  br i1 %66, label %67, label %69

67:                                               ; preds = %56
  %68 = load i32, ptr %13, align 4, !tbaa !9
  store i32 %68, ptr %6, align 4
  store i32 1, ptr %14, align 4
  br label %73

69:                                               ; preds = %56
  br label %70

70:                                               ; preds = %69
  %71 = load i32, ptr %13, align 4, !tbaa !9
  %72 = add nsw i32 %71, -1
  store i32 %72, ptr %13, align 4, !tbaa !9
  br label %52, !llvm.loop !11

73:                                               ; preds = %67, %55
  call void @llvm.lifetime.end.p0(i64 4, ptr %13) #4
  %74 = load i32, ptr %14, align 4
  switch i32 %74, label %76 [
    i32 2, label %75
  ]

75:                                               ; preds = %73
  store i32 -1, ptr %6, align 4
  store i32 1, ptr %14, align 4
  br label %76

76:                                               ; preds = %75, %73
  call void @llvm.lifetime.end.p0(i64 8, ptr %12) #4
  %77 = load i32, ptr %6, align 4
  ret i32 %77
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { nounwind "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 = { noreturn nounwind "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 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 #4 = { nounwind }
attributes #5 = { noreturn 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 = 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"

@stderr = external local_unnamed_addr global ptr, align 8
@.str = external hidden unnamed_addr constant [31 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [13 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [14 x i8], align 1
@.str.3 = external hidden unnamed_addr constant [42 x i8], align 1
@.str.4 = external hidden unnamed_addr constant [14 x i8], align 1
@.str.5 = external hidden unnamed_addr constant [28 x i8], align 1
@.str.6 = external hidden unnamed_addr constant [13 x i8], align 1
@.str.7 = external hidden unnamed_addr constant [13 x i8], align 1

; Function Attrs: nofree nounwind
declare noundef i32 @fprintf(ptr nocapture noundef, ptr nocapture noundef readonly, ...) local_unnamed_addr #0

; Function Attrs: noreturn nounwind
declare void @exit(i32 noundef) local_unnamed_addr #1

; Function Attrs: nounwind uwtable
define dso_local range(i32 -1, 2147483647) i32 @linearSearchGetLast(ptr noundef %0, ptr noundef %1, i32 noundef %2, i32 noundef %3, ptr noundef readonly %4) local_unnamed_addr #2 {
  %6 = icmp eq ptr %0, null
  br i1 %6, label %7, label %10

7:                                                ; preds = %5
  %8 = load ptr, ptr @stderr, align 8, !tbaa !5
  %9 = tail call i32 (ptr, ptr, ...) @fprintf(ptr noundef %8, ptr noundef nonnull @.str, ptr noundef nonnull @.str.1, ptr noundef nonnull @.str.2) #3
  tail call void @exit(i32 noundef -83386157) #4
  unreachable

10:                                               ; preds = %5
  %11 = icmp eq ptr %1, null
  br i1 %11, label %12, label %15

12:                                               ; preds = %10
  %13 = load ptr, ptr @stderr, align 8, !tbaa !5
  %14 = tail call i32 (ptr, ptr, ...) @fprintf(ptr noundef %13, ptr noundef nonnull @.str.3, ptr noundef nonnull @.str.4, ptr noundef nonnull @.str.2) #3
  tail call void @exit(i32 noundef -83384987) #4
  unreachable

15:                                               ; preds = %10
  %16 = icmp eq ptr %4, null
  br i1 %16, label %17, label %20

17:                                               ; preds = %15
  %18 = load ptr, ptr @stderr, align 8, !tbaa !5
  %19 = tail call i32 (ptr, ptr, ...) @fprintf(ptr noundef %18, ptr noundef nonnull @.str.3, ptr noundef nonnull @.str.5, ptr noundef nonnull @.str.2) #3
  tail call void @exit(i32 noundef -83384987) #4
  unreachable

20:                                               ; preds = %15
  %21 = icmp slt i32 %2, 0
  br i1 %21, label %22, label %25

22:                                               ; preds = %20
  %23 = load ptr, ptr @stderr, align 8, !tbaa !5
  %24 = tail call i32 (ptr, ptr, ...) @fprintf(ptr noundef %23, ptr noundef nonnull @.str.3, ptr noundef nonnull @.str.6, ptr noundef nonnull @.str.2) #3
  tail call void @exit(i32 noundef -83384987) #4
  unreachable

25:                                               ; preds = %20
  %26 = icmp slt i32 %3, 1
  br i1 %26, label %29, label %.preheader.preheader

.preheader.preheader:                             ; preds = %25
  %27 = zext nneg i32 %2 to i64
  %28 = zext nneg i32 %3 to i64
  br label %.preheader

29:                                               ; preds = %25
  %30 = load ptr, ptr @stderr, align 8, !tbaa !5
  %31 = tail call i32 (ptr, ptr, ...) @fprintf(ptr noundef %30, ptr noundef nonnull @.str.3, ptr noundef nonnull @.str.7, ptr noundef nonnull @.str.2) #3
  tail call void @exit(i32 noundef -83384987) #4
  unreachable

.preheader:                                       ; preds = %.preheader.preheader, %33
  %indvars.iv = phi i64 [ %27, %.preheader.preheader ], [ %indvars.iv.next, %33 ]
  %32 = icmp slt i64 %indvars.iv, 1
  br i1 %32, label %.split.loop.exit24, label %33

33:                                               ; preds = %.preheader
  %indvars.iv.next = add nsw i64 %indvars.iv, -1
  %34 = mul nsw i64 %indvars.iv.next, %28
  %35 = getelementptr inbounds i8, ptr %0, i64 %34
  %36 = tail call i32 %4(ptr noundef nonnull %1, ptr noundef nonnull %35) #5
  %37 = icmp eq i32 %36, 0
  br i1 %37, label %.split.loop.exit, label %.preheader, !llvm.loop !9

.split.loop.exit:                                 ; preds = %33
  %38 = trunc nsw i64 %indvars.iv.next to i32
  br label %.split.loop.exit24

.split.loop.exit24:                               ; preds = %.preheader, %.split.loop.exit
  %spec.select = phi i32 [ %38, %.split.loop.exit ], [ -1, %.preheader ]
  ret i32 %spec.select
}

attributes #0 = { nofree nounwind "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 = { noreturn nounwind "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 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 #3 = { cold nounwind }
attributes #4 = { noreturn nounwind }
attributes #5 = { 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 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,LCSSAPass,LICMPass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass