; LLVM IR from Muhammad-Magdi/problem-solving :: Backtracking/Backtracking - Suduku1.ll (Z10isAllValidv)

; 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: 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
declare dso_local noundef zeroext i1 @_Z7isValidii(i32 noundef, i32 noundef) #1

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef zeroext i1 @_Z10isAllValidv() #1 {
  %1 = alloca i1, align 1
  %2 = alloca i32, align 4
  %3 = alloca i32, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr %2) #2
  store i32 0, ptr %2, align 4, !tbaa !5
  br label %4

4:                                                ; preds = %14, %0
  %5 = load i32, ptr %2, align 4, !tbaa !5
  %6 = icmp slt i32 %5, 9
  br i1 %6, label %8, label %7

7:                                                ; preds = %4
  store i32 2, ptr %3, align 4
  br label %17

8:                                                ; preds = %4
  %9 = load i32, ptr %2, align 4, !tbaa !5
  %10 = load i32, ptr %2, align 4, !tbaa !5
  %11 = call noundef zeroext i1 @_Z7isValidii(i32 noundef %9, i32 noundef %10)
  br i1 %11, label %13, label %12

12:                                               ; preds = %8
  store i1 false, ptr %1, align 1
  store i32 1, ptr %3, align 4
  br label %17

13:                                               ; preds = %8
  br label %14

14:                                               ; preds = %13
  %15 = load i32, ptr %2, align 4, !tbaa !5
  %16 = add nsw i32 %15, 1
  store i32 %16, ptr %2, align 4, !tbaa !5
  br label %4, !llvm.loop !9

17:                                               ; preds = %12, %7
  call void @llvm.lifetime.end.p0(i64 4, ptr %2) #2
  %18 = load i32, ptr %3, align 4
  switch i32 %18, label %22 [
    i32 2, label %19
    i32 1, label %20
  ]

19:                                               ; preds = %17
  store i1 true, ptr %1, align 1
  br label %20

20:                                               ; preds = %19, %17
  %21 = load i1, ptr %1, align 1
  ret i1 %21

22:                                               ; preds = %17
  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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"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 nounwind uwtable
declare dso_local noundef zeroext i1 @_Z7isValidii(i32 noundef, i32 noundef) local_unnamed_addr #0

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef zeroext i1 @_Z10isAllValidv() local_unnamed_addr #0 {
  %1 = tail call noundef zeroext i1 @_Z7isValidii(i32 noundef 0, i32 noundef 0)
  br i1 %1, label %2, label %18

2:                                                ; preds = %0
  %3 = tail call noundef zeroext i1 @_Z7isValidii(i32 noundef 1, i32 noundef 1)
  br i1 %3, label %4, label %18

4:                                                ; preds = %2
  %5 = tail call noundef zeroext i1 @_Z7isValidii(i32 noundef 2, i32 noundef 2)
  br i1 %5, label %6, label %18

6:                                                ; preds = %4
  %7 = tail call noundef zeroext i1 @_Z7isValidii(i32 noundef 3, i32 noundef 3)
  br i1 %7, label %8, label %18

8:                                                ; preds = %6
  %9 = tail call noundef zeroext i1 @_Z7isValidii(i32 noundef 4, i32 noundef 4)
  br i1 %9, label %10, label %18

10:                                               ; preds = %8
  %11 = tail call noundef zeroext i1 @_Z7isValidii(i32 noundef 5, i32 noundef 5)
  br i1 %11, label %12, label %18

12:                                               ; preds = %10
  %13 = tail call noundef zeroext i1 @_Z7isValidii(i32 noundef 6, i32 noundef 6)
  br i1 %13, label %14, label %18

14:                                               ; preds = %12
  %15 = tail call noundef zeroext i1 @_Z7isValidii(i32 noundef 7, i32 noundef 7)
  br i1 %15, label %16, label %18

16:                                               ; preds = %14
  %17 = tail call noundef zeroext i1 @_Z7isValidii(i32 noundef 8, i32 noundef 8)
  br label %18

18:                                               ; preds = %16, %14, %12, %10, %8, %6, %4, %2, %0
  %.lcssa = phi i1 [ false, %0 ], [ false, %2 ], [ false, %4 ], [ false, %6 ], [ false, %8 ], [ false, %10 ], [ false, %12 ], [ false, %14 ], [ %17, %16 ]
  ret i1 %.lcssa
}

attributes #0 = { 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" }

!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)"}


; Effective O3 passes: CorrelatedValuePropagationPass,EarlyCSEPass,GVNPass,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,LCSSAPass,LoopRotatePass,SROAPass,SimplifyCFGPass,TailCallElimPass