; LLVM IR from VAR-solutions/Algorithms :: Backtracking/Permutation/permuta.ll (Z7permutaPiii)

; 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"

@.str = external hidden unnamed_addr constant [4 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [2 x i8], align 1

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_Z5trocaPiii(ptr noundef, i32 noundef, i32 noundef) #0

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

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

; Function Attrs: mustprogress uwtable
define dso_local void @_Z7permutaPiii(ptr noundef %0, i32 noundef %1, i32 noundef %2) #2 {
  %4 = alloca ptr, align 8
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  %8 = alloca i32, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store i32 %1, ptr %5, align 4, !tbaa !9
  store i32 %2, ptr %6, align 4, !tbaa !9
  %9 = load i32, ptr %5, align 4, !tbaa !9
  %10 = load i32, ptr %6, align 4, !tbaa !9
  %11 = icmp eq i32 %9, %10
  br i1 %11, label %12, label %30

12:                                               ; preds = %3
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #4
  store i32 0, ptr %7, align 4, !tbaa !9
  br label %13

13:                                               ; preds = %25, %12
  %14 = load i32, ptr %7, align 4, !tbaa !9
  %15 = load i32, ptr %6, align 4, !tbaa !9
  %16 = icmp sle i32 %14, %15
  br i1 %16, label %18, label %17

17:                                               ; preds = %13
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #4
  br label %28

18:                                               ; preds = %13
  %19 = load ptr, ptr %4, align 8, !tbaa !5
  %20 = load i32, ptr %7, align 4, !tbaa !9
  %21 = sext i32 %20 to i64
  %22 = getelementptr inbounds i32, ptr %19, i64 %21
  %23 = load i32, ptr %22, align 4, !tbaa !9
  %24 = call i32 (ptr, ...) @printf(ptr noundef @.str, i32 noundef %23)
  br label %25

25:                                               ; preds = %18
  %26 = load i32, ptr %7, align 4, !tbaa !9
  %27 = add nsw i32 %26, 1
  store i32 %27, ptr %7, align 4, !tbaa !9
  br label %13, !llvm.loop !11

28:                                               ; preds = %17
  %29 = call i32 (ptr, ...) @printf(ptr noundef @.str.1)
  br label %52

30:                                               ; preds = %3
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #4
  %31 = load i32, ptr %5, align 4, !tbaa !9
  store i32 %31, ptr %8, align 4, !tbaa !9
  br label %32

32:                                               ; preds = %48, %30
  %33 = load i32, ptr %8, align 4, !tbaa !9
  %34 = load i32, ptr %6, align 4, !tbaa !9
  %35 = icmp sle i32 %33, %34
  br i1 %35, label %37, label %36

36:                                               ; preds = %32
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #4
  br label %51

37:                                               ; preds = %32
  %38 = load ptr, ptr %4, align 8, !tbaa !5
  %39 = load i32, ptr %5, align 4, !tbaa !9
  %40 = load i32, ptr %8, align 4, !tbaa !9
  call void @_Z5trocaPiii(ptr noundef %38, i32 noundef %39, i32 noundef %40)
  %41 = load ptr, ptr %4, align 8, !tbaa !5
  %42 = load i32, ptr %5, align 4, !tbaa !9
  %43 = add nsw i32 %42, 1
  %44 = load i32, ptr %6, align 4, !tbaa !9
  call void @_Z7permutaPiii(ptr noundef %41, i32 noundef %43, i32 noundef %44)
  %45 = load ptr, ptr %4, align 8, !tbaa !5
  %46 = load i32, ptr %5, align 4, !tbaa !9
  %47 = load i32, ptr %8, align 4, !tbaa !9
  call void @_Z5trocaPiii(ptr noundef %45, i32 noundef %46, i32 noundef %47)
  br label %48

48:                                               ; preds = %37
  %49 = load i32, ptr %8, align 4, !tbaa !9
  %50 = add nsw i32 %49, 1
  store i32 %50, ptr %8, align 4, !tbaa !9
  br label %32, !llvm.loop !13

51:                                               ; preds = %36
  br label %52

52:                                               ; preds = %51, %28
  ret void
}

declare i32 @printf(ptr noundef, ...) #3

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" }
attributes #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { 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 #3 = { "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 }

!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"}
!13 = distinct !{!13, !12}


; 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"

@.str = external hidden unnamed_addr constant [4 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [2 x i8], align 1

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_Z5trocaPiii(ptr noundef, i32 noundef, i32 noundef) local_unnamed_addr #0

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_Z7permutaPiii(ptr noundef %0, i32 noundef %1, i32 noundef %2) local_unnamed_addr #0 {
  %4 = icmp eq i32 %1, %2
  br i1 %4, label %.preheader, label %.preheader23

.preheader23:                                     ; preds = %3
  %.not24 = icmp sgt i32 %1, %2
  br i1 %.not24, label %.loopexit, label %.lr.ph

.lr.ph:                                           ; preds = %.preheader23
  %5 = add nsw i32 %1, 1
  br label %11

.preheader:                                       ; preds = %3
  %.not2226 = icmp slt i32 %1, 0
  br i1 %.not2226, label %._crit_edge, label %.lr.ph28.preheader

.lr.ph28.preheader:                               ; preds = %.preheader
  %6 = add nuw i32 %1, 1
  %wide.trip.count = zext i32 %6 to i64
  br label %.lr.ph28

._crit_edge:                                      ; preds = %.lr.ph28, %.preheader
  %7 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.1)
  br label %.loopexit

.lr.ph28:                                         ; preds = %.lr.ph28.preheader, %.lr.ph28
  %indvars.iv = phi i64 [ 0, %.lr.ph28.preheader ], [ %indvars.iv.next, %.lr.ph28 ]
  %8 = getelementptr inbounds i32, ptr %0, i64 %indvars.iv
  %9 = load i32, ptr %8, align 4, !tbaa !5
  %10 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str, i32 noundef %9)
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %exitcond30.not = icmp eq i64 %indvars.iv.next, %wide.trip.count
  br i1 %exitcond30.not, label %._crit_edge, label %.lr.ph28, !llvm.loop !9

11:                                               ; preds = %.lr.ph, %11
  %.025 = phi i32 [ %1, %.lr.ph ], [ %12, %11 ]
  tail call void @_Z5trocaPiii(ptr noundef %0, i32 noundef %1, i32 noundef %.025)
  tail call void @_Z7permutaPiii(ptr noundef %0, i32 noundef %5, i32 noundef %2)
  tail call void @_Z5trocaPiii(ptr noundef %0, i32 noundef %1, i32 noundef %.025)
  %12 = add i32 %.025, 1
  %exitcond.not = icmp eq i32 %.025, %2
  br i1 %exitcond.not, label %.loopexit, label %11, !llvm.loop !11

.loopexit:                                        ; preds = %11, %.preheader23, %._crit_edge
  ret void
}

; Function Attrs: nofree nounwind
declare noundef i32 @printf(ptr nocapture noundef readonly, ...) local_unnamed_addr #1

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" }
attributes #1 = { 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" }

!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"}
!11 = distinct !{!11, !10}


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