; LLVM IR from eyangch/competitive-programming :: USACOcontests/gold/2014.12/marathon.ll (Z4distii)

; 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"

@N = external dso_local global i32, align 4
@x = external dso_local global [100000 x i32], align 16
@y = external dso_local global [100000 x i32], align 16

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef i32 @_Z4distii(i32 noundef %0, i32 noundef %1) #0 {
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  store i32 %0, ptr %4, align 4, !tbaa !5
  store i32 %1, ptr %5, align 4, !tbaa !5
  %6 = load i32, ptr %4, align 4, !tbaa !5
  %7 = icmp slt i32 %6, 0
  br i1 %7, label %12, label %8

8:                                                ; preds = %2
  %9 = load i32, ptr %5, align 4, !tbaa !5
  %10 = load i32, ptr @N, align 4, !tbaa !5
  %11 = icmp sge i32 %9, %10
  br i1 %11, label %12, label %13

12:                                               ; preds = %8, %2
  store i32 0, ptr %3, align 4
  br label %35

13:                                               ; preds = %8
  %14 = load i32, ptr %4, align 4, !tbaa !5
  %15 = sext i32 %14 to i64
  %16 = getelementptr inbounds [100000 x i32], ptr @x, i64 0, i64 %15
  %17 = load i32, ptr %16, align 4, !tbaa !5
  %18 = load i32, ptr %5, align 4, !tbaa !5
  %19 = sext i32 %18 to i64
  %20 = getelementptr inbounds [100000 x i32], ptr @x, i64 0, i64 %19
  %21 = load i32, ptr %20, align 4, !tbaa !5
  %22 = sub nsw i32 %17, %21
  %23 = call i32 @llvm.abs.i32(i32 %22, i1 true)
  %24 = load i32, ptr %4, align 4, !tbaa !5
  %25 = sext i32 %24 to i64
  %26 = getelementptr inbounds [100000 x i32], ptr @y, i64 0, i64 %25
  %27 = load i32, ptr %26, align 4, !tbaa !5
  %28 = load i32, ptr %5, align 4, !tbaa !5
  %29 = sext i32 %28 to i64
  %30 = getelementptr inbounds [100000 x i32], ptr @y, i64 0, i64 %29
  %31 = load i32, ptr %30, align 4, !tbaa !5
  %32 = sub nsw i32 %27, %31
  %33 = call i32 @llvm.abs.i32(i32 %32, i1 true)
  %34 = add nsw i32 %23, %33
  store i32 %34, ptr %3, align 4
  br label %35

35:                                               ; preds = %13, %12
  %36 = load i32, ptr %3, align 4
  ret i32 %36
}

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i32 @llvm.abs.i32(i32, i1 immarg) #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 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }

!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"}


; 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"

@N = external dso_local local_unnamed_addr global i32, align 4
@x = external dso_local local_unnamed_addr global [100000 x i32], align 16
@y = external dso_local local_unnamed_addr global [100000 x i32], align 16

; Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(read, argmem: none, inaccessiblemem: none) uwtable
define dso_local noundef range(i32 0, -2147483648) i32 @_Z4distii(i32 noundef %0, i32 noundef %1) local_unnamed_addr #0 {
  %3 = icmp sgt i32 %0, -1
  %4 = load i32, ptr @N, align 4
  %.not = icmp sgt i32 %4, %1
  %or.cond = select i1 %3, i1 %.not, i1 false
  br i1 %or.cond, label %5, label %21

5:                                                ; preds = %2
  %6 = zext nneg i32 %0 to i64
  %7 = getelementptr inbounds [100000 x i32], ptr @x, i64 0, i64 %6
  %8 = load i32, ptr %7, align 4, !tbaa !5
  %9 = sext i32 %1 to i64
  %10 = getelementptr inbounds [100000 x i32], ptr @x, i64 0, i64 %9
  %11 = load i32, ptr %10, align 4, !tbaa !5
  %12 = sub nsw i32 %8, %11
  %13 = tail call i32 @llvm.abs.i32(i32 %12, i1 true)
  %14 = getelementptr inbounds [100000 x i32], ptr @y, i64 0, i64 %6
  %15 = load i32, ptr %14, align 4, !tbaa !5
  %16 = getelementptr inbounds [100000 x i32], ptr @y, i64 0, i64 %9
  %17 = load i32, ptr %16, align 4, !tbaa !5
  %18 = sub nsw i32 %15, %17
  %19 = tail call i32 @llvm.abs.i32(i32 %18, i1 true)
  %20 = add nuw nsw i32 %19, %13
  br label %21

21:                                               ; preds = %2, %5
  %.0 = phi i32 [ %20, %5 ], [ 0, %2 ]
  ret i32 %.0
}

; Function Attrs: mustprogress nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i32 @llvm.abs.i32(i32, i1 immarg) #1

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" }
attributes #1 = { mustprogress nocallback nofree nosync nounwind speculatable willreturn memory(none) }

!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"}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass