; LLVM IR from bqi343/cp-notebook :: Contests/USACO Solutions/2007-08/nabor.ll (Z6updateiii)

; 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 }

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

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_Z6updateiii(i32 noundef %0, i32 noundef %1, i32 noundef %2) #0 {
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  store i32 %0, ptr %4, align 4, !tbaa !5
  store i32 %1, ptr %5, align 4, !tbaa !5
  store i32 %2, ptr %6, align 4, !tbaa !5
  br label %7

7:                                                ; preds = %30, %3
  %8 = load i32, ptr %4, align 4, !tbaa !5
  %9 = icmp sgt i32 %8, 0
  br i1 %9, label %10, label %37

10:                                               ; preds = %7
  %11 = load i32, ptr %4, align 4, !tbaa !5
  %12 = sext i32 %11 to i64
  %13 = getelementptr inbounds [100010 x %struct.node], ptr @T, i64 0, i64 %12
  %14 = getelementptr inbounds %struct.node, ptr %13, i32 0, i32 0
  %15 = load i32, ptr %14, align 8, !tbaa !9
  %16 = load i32, ptr %5, align 4, !tbaa !5
  %17 = icmp sgt i32 %15, %16
  br i1 %17, label %18, label %29

18:                                               ; preds = %10
  %19 = load i32, ptr %5, align 4, !tbaa !5
  %20 = load i32, ptr %4, align 4, !tbaa !5
  %21 = sext i32 %20 to i64
  %22 = getelementptr inbounds [100010 x %struct.node], ptr @T, i64 0, i64 %21
  %23 = getelementptr inbounds %struct.node, ptr %22, i32 0, i32 0
  store i32 %19, ptr %23, align 8, !tbaa !9
  %24 = load i32, ptr %6, align 4, !tbaa !5
  %25 = load i32, ptr %4, align 4, !tbaa !5
  %26 = sext i32 %25 to i64
  %27 = getelementptr inbounds [100010 x %struct.node], ptr @T, i64 0, i64 %26
  %28 = getelementptr inbounds %struct.node, ptr %27, i32 0, i32 1
  store i32 %24, ptr %28, align 4, !tbaa !11
  br label %29

29:                                               ; preds = %18, %10
  br label %30

30:                                               ; preds = %29
  %31 = load i32, ptr %4, align 4, !tbaa !5
  %32 = load i32, ptr %4, align 4, !tbaa !5
  %33 = sub nsw i32 0, %32
  %34 = and i32 %31, %33
  %35 = load i32, ptr %4, align 4, !tbaa !5
  %36 = sub nsw i32 %35, %34
  store i32 %36, ptr %4, align 4, !tbaa !5
  br label %7, !llvm.loop !12

37:                                               ; preds = %7
  ret void
}

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)"}
!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 }

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

; Function Attrs: mustprogress nofree norecurse nosync nounwind memory(readwrite, argmem: none, inaccessiblemem: none) uwtable
define dso_local void @_Z6updateiii(i32 noundef %0, i32 noundef %1, i32 noundef %2) local_unnamed_addr #0 {
  %4 = icmp sgt i32 %0, 0
  br i1 %4, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %3, %11
  %.011 = phi i32 [ %12, %11 ], [ %0, %3 ]
  %5 = zext nneg i32 %.011 to i64
  %6 = getelementptr inbounds [100010 x %struct.node], ptr @T, i64 0, i64 %5
  %7 = load i32, ptr %6, align 8, !tbaa !5
  %8 = icmp sgt i32 %7, %1
  br i1 %8, label %9, label %11

9:                                                ; preds = %.lr.ph
  store i32 %1, ptr %6, align 8, !tbaa !5
  %10 = getelementptr inbounds i8, ptr %6, i64 4
  store i32 %2, ptr %10, align 4, !tbaa !10
  br label %11

11:                                               ; preds = %.lr.ph, %9
  %.not = add nsw i32 %.011, -1
  %12 = and i32 %.not, %.011
  %.not12 = icmp eq i32 %12, 0
  br i1 %.not12, label %._crit_edge, label %.lr.ph, !llvm.loop !11

._crit_edge:                                      ; preds = %11, %3
  ret void
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind memory(readwrite, 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, !7, i64 0}
!6 = !{!"_ZTS4node", !7, i64 0, !7, i64 4}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}
!10 = !{!6, !7, i64 4}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: CorrelatedValuePropagationPass,EarlyCSEPass,GlobalOptPass,IPSCCPPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass