; LLVM IR from MakeContributions/DSA :: algorithms/CPlusPlus/Recursion/array-sorted-or-not.ll (Z6sortedPii)

; 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 zeroext i1 @_Z6sortedPii(ptr noundef %0, i32 noundef %1) #0 {
  %3 = alloca i1, align 1
  %4 = alloca ptr, align 8
  %5 = alloca i32, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store i32 %1, ptr %5, align 4, !tbaa !9
  %6 = load i32, ptr %5, align 4, !tbaa !9
  %7 = icmp eq i32 %6, 1
  br i1 %7, label %11, label %8

8:                                                ; preds = %2
  %9 = load i32, ptr %5, align 4, !tbaa !9
  %10 = icmp eq i32 %9, 0
  br i1 %10, label %11, label %12

11:                                               ; preds = %8, %2
  store i1 true, ptr %3, align 1
  br label %32

12:                                               ; preds = %8
  %13 = load ptr, ptr %4, align 8, !tbaa !5
  %14 = load i32, ptr %5, align 4, !tbaa !9
  %15 = sub nsw i32 %14, 1
  %16 = sext i32 %15 to i64
  %17 = getelementptr inbounds i32, ptr %13, i64 %16
  %18 = load i32, ptr %17, align 4, !tbaa !9
  %19 = load ptr, ptr %4, align 8, !tbaa !5
  %20 = load i32, ptr %5, align 4, !tbaa !9
  %21 = sub nsw i32 %20, 2
  %22 = sext i32 %21 to i64
  %23 = getelementptr inbounds i32, ptr %19, i64 %22
  %24 = load i32, ptr %23, align 4, !tbaa !9
  %25 = icmp sgt i32 %18, %24
  br i1 %25, label %26, label %31

26:                                               ; preds = %12
  %27 = load ptr, ptr %4, align 8, !tbaa !5
  %28 = load i32, ptr %5, align 4, !tbaa !9
  %29 = sub nsw i32 %28, 1
  %30 = call noundef zeroext i1 @_Z6sortedPii(ptr noundef %27, i32 noundef %29)
  store i1 %30, ptr %3, align 1
  br label %32

31:                                               ; preds = %12
  store i1 false, ptr %3, align 1
  br label %32

32:                                               ; preds = %31, %26, %11
  %33 = load i1, ptr %3, align 1
  ret i1 %33
}

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" }

!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}


; 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(argmem: read) uwtable
define dso_local noundef zeroext i1 @_Z6sortedPii(ptr nocapture noundef readonly %0, i32 noundef %1) local_unnamed_addr #0 {
  %invariant.gep = getelementptr i8, ptr %0, i64 -8
  %3 = sext i32 %1 to i64
  br label %tailrecurse

tailrecurse:                                      ; preds = %4, %2
  %indvars.iv = phi i64 [ %indvars.iv.next, %4 ], [ %3, %2 ]
  %or.cond = icmp ult i64 %indvars.iv, 2
  br i1 %or.cond, label %9, label %4

4:                                                ; preds = %tailrecurse
  %indvars.iv.next = add nsw i64 %indvars.iv, -1
  %5 = getelementptr inbounds i32, ptr %0, i64 %indvars.iv.next
  %6 = load i32, ptr %5, align 4, !tbaa !5
  %gep = getelementptr i32, ptr %invariant.gep, i64 %indvars.iv
  %7 = load i32, ptr %gep, align 4, !tbaa !5
  %8 = icmp sgt i32 %6, %7
  br i1 %8, label %tailrecurse, label %9

9:                                                ; preds = %4, %tailrecurse
  ret i1 %or.cond
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(argmem: read) 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, !6, i64 0}
!6 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}


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