; LLVM IR from codemistic/Data-Structures-and-Algorithms :: Arrays/13_IsSorted .ll (Z8IsSortedP5Array)

; 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.Array = type { ptr, 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: mustprogress nounwind uwtable
define dso_local noundef i32 @_Z8IsSortedP5Array(ptr noundef %0) #1 {
  %2 = alloca i32, align 4
  %3 = alloca ptr, align 8
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #2
  store i32 0, ptr %4, align 4, !tbaa !9
  br label %6

6:                                                ; preds = %33, %1
  %7 = load i32, ptr %4, align 4, !tbaa !9
  %8 = load ptr, ptr %3, align 8, !tbaa !5
  %9 = getelementptr inbounds %struct.Array, ptr %8, i32 0, i32 2
  %10 = load i32, ptr %9, align 4, !tbaa !11
  %11 = sub nsw i32 %10, 1
  %12 = icmp slt i32 %7, %11
  br i1 %12, label %14, label %13

13:                                               ; preds = %6
  store i32 2, ptr %5, align 4
  br label %36

14:                                               ; preds = %6
  %15 = load ptr, ptr %3, align 8, !tbaa !5
  %16 = getelementptr inbounds %struct.Array, ptr %15, i32 0, i32 0
  %17 = load ptr, ptr %16, align 8, !tbaa !13
  %18 = load i32, ptr %4, align 4, !tbaa !9
  %19 = sext i32 %18 to i64
  %20 = getelementptr inbounds i32, ptr %17, i64 %19
  %21 = load i32, ptr %20, align 4, !tbaa !9
  %22 = load ptr, ptr %3, align 8, !tbaa !5
  %23 = getelementptr inbounds %struct.Array, ptr %22, i32 0, i32 0
  %24 = load ptr, ptr %23, align 8, !tbaa !13
  %25 = load i32, ptr %4, align 4, !tbaa !9
  %26 = add nsw i32 %25, 1
  %27 = sext i32 %26 to i64
  %28 = getelementptr inbounds i32, ptr %24, i64 %27
  %29 = load i32, ptr %28, align 4, !tbaa !9
  %30 = icmp sgt i32 %21, %29
  br i1 %30, label %31, label %32

31:                                               ; preds = %14
  store i32 0, ptr %2, align 4
  store i32 1, ptr %5, align 4
  br label %36

32:                                               ; preds = %14
  br label %33

33:                                               ; preds = %32
  %34 = load i32, ptr %4, align 4, !tbaa !9
  %35 = add nsw i32 %34, 1
  store i32 %35, ptr %4, align 4, !tbaa !9
  br label %6, !llvm.loop !14

36:                                               ; preds = %31, %13
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #2
  %37 = load i32, ptr %5, align 4
  switch i32 %37, label %41 [
    i32 2, label %38
    i32 1, label %39
  ]

38:                                               ; preds = %36
  store i32 1, ptr %2, align 4
  br label %39

39:                                               ; preds = %38, %36
  %40 = load i32, ptr %2, align 4
  ret i32 %40

41:                                               ; preds = %36
  unreachable
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { mustprogress 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++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = !{!12, !10, i64 12}
!12 = !{!"_ZTS5Array", !6, i64 0, !10, i64 8, !10, i64 12}
!13 = !{!12, !6, i64 0}
!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: mustprogress nofree norecurse nosync nounwind willreturn memory(read, inaccessiblemem: none) uwtable
define dso_local noundef range(i32 0, 2) i32 @_Z8IsSortedP5Array(ptr nocapture noundef readonly %0) local_unnamed_addr #0 {
  %2 = getelementptr inbounds i8, ptr %0, i64 12
  %3 = load i32, ptr %2, align 4, !tbaa !5
  %4 = add nsw i32 %3, -1
  %smax = tail call i32 @llvm.smax.i32(i32 %4, i32 0)
  %wide.trip.count = zext nneg i32 %smax to i64
  br label %5

5:                                                ; preds = %6, %1
  %indvars.iv = phi i64 [ %indvars.iv.next, %6 ], [ 0, %1 ]
  %exitcond = icmp eq i64 %indvars.iv, %wide.trip.count
  br i1 %exitcond, label %13, label %6

6:                                                ; preds = %5
  %7 = load ptr, ptr %0, align 8, !tbaa !11
  %8 = getelementptr inbounds i32, ptr %7, i64 %indvars.iv
  %9 = load i32, ptr %8, align 4, !tbaa !12
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %10 = getelementptr inbounds i32, ptr %7, i64 %indvars.iv.next
  %11 = load i32, ptr %10, align 4, !tbaa !12
  %12 = icmp sgt i32 %9, %11
  br i1 %12, label %13, label %5, !llvm.loop !13

13:                                               ; preds = %6, %5
  %14 = sext i32 %4 to i64
  %.not = icmp sge i64 %indvars.iv, %14
  %spec.select = zext i1 %.not to i32
  ret i32 %spec.select
}

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i32 @llvm.smax.i32(i32, i32) #1

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn 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" }
attributes #1 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }

!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 12}
!6 = !{!"_ZTS5Array", !7, i64 0, !10, i64 8, !10, i64 12}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}
!10 = !{!"int", !8, i64 0}
!11 = !{!6, !7, i64 0}
!12 = !{!10, !10, i64 0}
!13 = distinct !{!13, !14}
!14 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: CorrelatedValuePropagationPass,EarlyCSEPass,GVNPass,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,LCSSAPass,LICMPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SCCPPass,SROAPass,SimplifyCFGPass,TailCallElimPass