; LLVM IR from bqi343/cp-notebook :: Contests/USACO Solutions/2007-08/nabor.ll (Z5queryi)

; 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.node = type { i32, i32 }

@n = external dso_local global i32, align 4
@T = external dso_local global [100010 x %struct.node], align 16

; 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 @_Z5queryi(i32 noundef %0) #1 {
  %2 = alloca i32, align 4
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  store i32 %0, ptr %2, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #2
  store i32 2147483647, ptr %3, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #2
  store i32 -1, ptr %4, align 4, !tbaa !5
  br label %5

5:                                                ; preds = %29, %1
  %6 = load i32, ptr %2, align 4, !tbaa !5
  %7 = load i32, ptr @n, align 4, !tbaa !5
  %8 = icmp sle i32 %6, %7
  br i1 %8, label %9, label %36

9:                                                ; preds = %5
  %10 = load i32, ptr %2, align 4, !tbaa !5
  %11 = sext i32 %10 to i64
  %12 = getelementptr inbounds [100010 x %struct.node], ptr @T, i64 0, i64 %11
  %13 = getelementptr inbounds %struct.node, ptr %12, i32 0, i32 0
  %14 = load i32, ptr %13, align 8, !tbaa !9
  %15 = load i32, ptr %3, align 4, !tbaa !5
  %16 = icmp slt i32 %14, %15
  br i1 %16, label %17, label %28

17:                                               ; preds = %9
  %18 = load i32, ptr %2, align 4, !tbaa !5
  %19 = sext i32 %18 to i64
  %20 = getelementptr inbounds [100010 x %struct.node], ptr @T, i64 0, i64 %19
  %21 = getelementptr inbounds %struct.node, ptr %20, i32 0, i32 0
  %22 = load i32, ptr %21, align 8, !tbaa !9
  store i32 %22, ptr %3, align 4, !tbaa !5
  %23 = load i32, ptr %2, align 4, !tbaa !5
  %24 = sext i32 %23 to i64
  %25 = getelementptr inbounds [100010 x %struct.node], ptr @T, i64 0, i64 %24
  %26 = getelementptr inbounds %struct.node, ptr %25, i32 0, i32 1
  %27 = load i32, ptr %26, align 4, !tbaa !11
  store i32 %27, ptr %4, align 4, !tbaa !5
  br label %28

28:                                               ; preds = %17, %9
  br label %29

29:                                               ; preds = %28
  %30 = load i32, ptr %2, align 4, !tbaa !5
  %31 = load i32, ptr %2, align 4, !tbaa !5
  %32 = sub nsw i32 0, %31
  %33 = and i32 %30, %32
  %34 = load i32, ptr %2, align 4, !tbaa !5
  %35 = add nsw i32 %34, %33
  store i32 %35, ptr %2, align 4, !tbaa !5
  br label %5, !llvm.loop !12

36:                                               ; preds = %5
  %37 = load i32, ptr %4, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #2
  ret i32 %37
}

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 = !{!10, !6, i64 0}
!10 = !{!"_ZTS4node", !6, i64 0, !6, i64 4}
!11 = !{!10, !6, i64 4}
!12 = distinct !{!12, !13}
!13 = !{!"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.node = type { i32, i32 }

@n = external dso_local local_unnamed_addr global i32, align 4
@T = external dso_local local_unnamed_addr global [100010 x %struct.node], align 16

; Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(read, argmem: none, inaccessiblemem: none) uwtable
define dso_local noundef i32 @_Z5queryi(i32 noundef %0) local_unnamed_addr #0 {
  %2 = load i32, ptr @n, align 4, !tbaa !5
  %.not13 = icmp slt i32 %2, %0
  br i1 %.not13, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %1, %10
  %.016 = phi i32 [ %.1, %10 ], [ -1, %1 ]
  %.0915 = phi i32 [ %.110, %10 ], [ 2147483647, %1 ]
  %.01114 = phi i32 [ %13, %10 ], [ %0, %1 ]
  %3 = sext i32 %.01114 to i64
  %4 = getelementptr inbounds [100010 x %struct.node], ptr @T, i64 0, i64 %3
  %5 = load i32, ptr %4, align 8, !tbaa !9
  %6 = icmp slt i32 %5, %.0915
  br i1 %6, label %7, label %10

7:                                                ; preds = %.lr.ph
  %8 = getelementptr inbounds i8, ptr %4, i64 4
  %9 = load i32, ptr %8, align 4, !tbaa !11
  br label %10

10:                                               ; preds = %.lr.ph, %7
  %.110 = phi i32 [ %5, %7 ], [ %.0915, %.lr.ph ]
  %.1 = phi i32 [ %9, %7 ], [ %.016, %.lr.ph ]
  %11 = sub nsw i32 0, %.01114
  %12 = and i32 %.01114, %11
  %13 = add nsw i32 %12, %.01114
  %.not = icmp sgt i32 %13, %2
  br i1 %.not, label %._crit_edge, label %.lr.ph, !llvm.loop !12

._crit_edge:                                      ; preds = %10, %1
  %.0.lcssa = phi i32 [ -1, %1 ], [ %.1, %10 ]
  ret i32 %.0.lcssa
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(read, argmem: none, 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" }

!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 = !{!10, !6, i64 0}
!10 = !{!"_ZTS4node", !6, i64 0, !6, i64 4}
!11 = !{!10, !6, i64 4}
!12 = distinct !{!12, !13}
!13 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass