; LLVM IR from clausecker/24puzzle :: compact (cps_round)

; 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.cp_slice = type { ptr, i64, i64 }
%struct.compact_puzzle = type { i64, i64 }

; 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 uwtable
declare dso_local i32 @compare_cp(ptr noundef, ptr noundef) #1

; Function Attrs: nounwind uwtable
define dso_local void @cps_round(ptr noalias noundef %0, ptr noalias noundef %1) #1 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca i64, align 8
  store ptr %0, ptr %3, align 8, !tbaa !5
  store ptr %1, ptr %4, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #3
  store i64 0, ptr %5, align 8, !tbaa !9
  br label %6

6:                                                ; preds = %19, %2
  %7 = load i64, ptr %5, align 8, !tbaa !9
  %8 = load ptr, ptr %4, align 8, !tbaa !5
  %9 = getelementptr inbounds %struct.cp_slice, ptr %8, i32 0, i32 1
  %10 = load i64, ptr %9, align 8, !tbaa !11
  %11 = icmp ult i64 %7, %10
  br i1 %11, label %12, label %22

12:                                               ; preds = %6
  %13 = load ptr, ptr %3, align 8, !tbaa !5
  %14 = load ptr, ptr %4, align 8, !tbaa !5
  %15 = getelementptr inbounds %struct.cp_slice, ptr %14, i32 0, i32 0
  %16 = load ptr, ptr %15, align 8, !tbaa !13
  %17 = load i64, ptr %5, align 8, !tbaa !9
  %18 = getelementptr inbounds %struct.compact_puzzle, ptr %16, i64 %17
  call void @cps_expand(ptr noundef %13, ptr noundef %18)
  br label %19

19:                                               ; preds = %12
  %20 = load i64, ptr %5, align 8, !tbaa !9
  %21 = add i64 %20, 1
  store i64 %21, ptr %5, align 8, !tbaa !9
  br label %6, !llvm.loop !14

22:                                               ; preds = %6
  %23 = load ptr, ptr %3, align 8, !tbaa !5
  %24 = getelementptr inbounds %struct.cp_slice, ptr %23, i32 0, i32 0
  %25 = load ptr, ptr %24, align 8, !tbaa !13
  %26 = load ptr, ptr %3, align 8, !tbaa !5
  %27 = getelementptr inbounds %struct.cp_slice, ptr %26, i32 0, i32 1
  %28 = load i64, ptr %27, align 8, !tbaa !11
  call void @qsort(ptr noundef %25, i64 noundef %28, i64 noundef 16, ptr noundef @compare_cp)
  %29 = load ptr, ptr %3, align 8, !tbaa !5
  call void @cps_coalesce(ptr noundef %29)
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #3
  ret void
}

; Function Attrs: nounwind uwtable
declare hidden void @cps_expand(ptr noundef, ptr noundef) #1

declare void @qsort(ptr noundef, i64 noundef, i64 noundef, ptr noundef) #2

; Function Attrs: nounwind uwtable
declare hidden void @cps_coalesce(ptr noundef) #1

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

!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 = !{!"long", !7, i64 0}
!11 = !{!12, !10, i64 8}
!12 = !{!"cp_slice", !6, i64 0, !10, i64 8, !10, i64 16}
!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"

%struct.compact_puzzle = type { i64, i64 }

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

; Function Attrs: nounwind uwtable
define dso_local void @cps_round(ptr noalias noundef %0, ptr noalias nocapture noundef readonly %1) local_unnamed_addr #0 {
  %3 = getelementptr inbounds i8, ptr %1, i64 8
  %4 = load i64, ptr %3, align 8, !tbaa !5
  %.not = icmp eq i64 %4, 0
  br i1 %.not, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %2
  %5 = load ptr, ptr %1, align 8, !tbaa !11
  br label %6

6:                                                ; preds = %.lr.ph, %6
  %.08 = phi i64 [ 0, %.lr.ph ], [ %8, %6 ]
  %7 = getelementptr inbounds %struct.compact_puzzle, ptr %5, i64 %.08
  tail call void @cps_expand(ptr noundef %0, ptr noundef %7)
  %8 = add nuw i64 %.08, 1
  %exitcond.not = icmp eq i64 %8, %4
  br i1 %exitcond.not, label %._crit_edge, label %6, !llvm.loop !12

._crit_edge:                                      ; preds = %6, %2
  %9 = load ptr, ptr %0, align 8, !tbaa !11
  %10 = getelementptr inbounds i8, ptr %0, i64 8
  %11 = load i64, ptr %10, align 8, !tbaa !5
  tail call void @qsort(ptr noundef %9, i64 noundef %11, i64 noundef 16, ptr noundef nonnull @compare_cp) #2
  tail call void @cps_coalesce(ptr noundef nonnull %0)
  ret void
}

; Function Attrs: nounwind uwtable
declare hidden void @cps_expand(ptr noundef, ptr noundef) local_unnamed_addr #0

; Function Attrs: nofree
declare void @qsort(ptr noundef, i64 noundef, i64 noundef, ptr nocapture noundef) local_unnamed_addr #1

; Function Attrs: nounwind uwtable
declare hidden void @cps_coalesce(ptr noundef) local_unnamed_addr #0

attributes #0 = { 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 "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, !10, i64 8}
!6 = !{!"cp_slice", !7, i64 0, !10, i64 8, !10, i64 16}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"long", !8, i64 0}
!11 = !{!6, !7, i64 0}
!12 = distinct !{!12, !13}
!13 = !{!"llvm.loop.mustprogress"}


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