; LLVM IR from tangjz/acm-icpc :: codechef/ACM15AMR/AMCOINS.ll (Z7bit_addii)

; 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
@st = external dso_local global i32, align 4
@tim = external dso_local global [500001 x i32], align 16
@bit = external dso_local global [500001 x i32], align 16

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_Z7bit_addii(i32 noundef %0, i32 noundef %1) #0 {
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  store i32 %0, ptr %3, align 4, !tbaa !5
  store i32 %1, ptr %4, align 4, !tbaa !5
  br label %5

5:                                                ; preds = %31, %2
  %6 = load i32, ptr %3, 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 %38

9:                                                ; preds = %5
  %10 = load i32, ptr %3, align 4, !tbaa !5
  %11 = sext i32 %10 to i64
  %12 = getelementptr inbounds [500001 x i32], ptr @tim, i64 0, i64 %11
  %13 = load i32, ptr %12, align 4, !tbaa !5
  %14 = load i32, ptr @st, align 4, !tbaa !5
  %15 = icmp ne i32 %13, %14
  br i1 %15, label %16, label %24

16:                                               ; preds = %9
  %17 = load i32, ptr @st, align 4, !tbaa !5
  %18 = load i32, ptr %3, align 4, !tbaa !5
  %19 = sext i32 %18 to i64
  %20 = getelementptr inbounds [500001 x i32], ptr @tim, i64 0, i64 %19
  store i32 %17, ptr %20, align 4, !tbaa !5
  %21 = load i32, ptr %3, align 4, !tbaa !5
  %22 = sext i32 %21 to i64
  %23 = getelementptr inbounds [500001 x i32], ptr @bit, i64 0, i64 %22
  store i32 0, ptr %23, align 4, !tbaa !5
  br label %24

24:                                               ; preds = %16, %9
  %25 = load i32, ptr %4, align 4, !tbaa !5
  %26 = load i32, ptr %3, align 4, !tbaa !5
  %27 = sext i32 %26 to i64
  %28 = getelementptr inbounds [500001 x i32], ptr @bit, i64 0, i64 %27
  %29 = load i32, ptr %28, align 4, !tbaa !5
  %30 = add nsw i32 %29, %25
  store i32 %30, ptr %28, align 4, !tbaa !5
  br label %31

31:                                               ; preds = %24
  %32 = load i32, ptr %3, align 4, !tbaa !5
  %33 = load i32, ptr %3, align 4, !tbaa !5
  %34 = sub nsw i32 0, %33
  %35 = and i32 %32, %34
  %36 = load i32, ptr %3, align 4, !tbaa !5
  %37 = add nsw i32 %36, %35
  store i32 %37, ptr %3, align 4, !tbaa !5
  br label %5, !llvm.loop !9

38:                                               ; preds = %5
  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 = distinct !{!9, !10}
!10 = !{!"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"

@n = external dso_local local_unnamed_addr global i32, align 4
@st = external dso_local local_unnamed_addr global i32, align 4
@tim = external dso_local local_unnamed_addr global [500001 x i32], align 16
@bit = external dso_local local_unnamed_addr global [500001 x i32], align 16

; Function Attrs: mustprogress nofree norecurse nosync nounwind memory(readwrite, argmem: none, inaccessiblemem: none) uwtable
define dso_local void @_Z7bit_addii(i32 noundef %0, i32 noundef %1) local_unnamed_addr #0 {
  %3 = load i32, ptr @n, align 4, !tbaa !5
  %.not11 = icmp slt i32 %3, %0
  br i1 %.not11, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %2
  %4 = load i32, ptr @st, align 4, !tbaa !5
  br label %5

5:                                                ; preds = %.lr.ph, %10
  %.012 = phi i32 [ %0, %.lr.ph ], [ %16, %10 ]
  %6 = sext i32 %.012 to i64
  %7 = getelementptr inbounds [500001 x i32], ptr @tim, i64 0, i64 %6
  %8 = load i32, ptr %7, align 4, !tbaa !5
  %.not10 = icmp eq i32 %8, %4
  br i1 %.not10, label %._crit_edge13, label %9

._crit_edge13:                                    ; preds = %5
  %.phi.trans.insert = getelementptr inbounds [500001 x i32], ptr @bit, i64 0, i64 %6
  %.pre = load i32, ptr %.phi.trans.insert, align 4, !tbaa !5
  br label %10

9:                                                ; preds = %5
  store i32 %4, ptr %7, align 4, !tbaa !5
  br label %10

10:                                               ; preds = %._crit_edge13, %9
  %11 = phi i32 [ %.pre, %._crit_edge13 ], [ 0, %9 ]
  %12 = getelementptr inbounds [500001 x i32], ptr @bit, i64 0, i64 %6
  %13 = add nsw i32 %11, %1
  store i32 %13, ptr %12, align 4, !tbaa !5
  %14 = sub nsw i32 0, %.012
  %15 = and i32 %.012, %14
  %16 = add nsw i32 %15, %.012
  %.not = icmp sgt i32 %16, %3
  br i1 %.not, label %._crit_edge, label %5, !llvm.loop !9

._crit_edge:                                      ; preds = %10, %2
  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, !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"}


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