; LLVM IR from Tunghohin/Competitive_Coding :: Daimayuan/794.ll (Z6modifyixPx)

; 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

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i32 @_Z7low_biti(i32 noundef) #0

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_Z6modifyixPx(i32 noundef %0, i64 noundef %1, ptr noundef %2) #0 {
  %4 = alloca i32, align 4
  %5 = alloca i64, align 8
  %6 = alloca ptr, align 8
  store i32 %0, ptr %4, align 4, !tbaa !5
  store i64 %1, ptr %5, align 8, !tbaa !9
  store ptr %2, ptr %6, align 8, !tbaa !11
  br label %7

7:                                                ; preds = %20, %3
  %8 = load i32, ptr %4, align 4, !tbaa !5
  %9 = load i32, ptr @n, align 4, !tbaa !5
  %10 = add nsw i32 %9, 1
  %11 = icmp sle i32 %8, %10
  br i1 %11, label %12, label %25

12:                                               ; preds = %7
  %13 = load i64, ptr %5, align 8, !tbaa !9
  %14 = load ptr, ptr %6, align 8, !tbaa !11
  %15 = load i32, ptr %4, align 4, !tbaa !5
  %16 = sext i32 %15 to i64
  %17 = getelementptr inbounds i64, ptr %14, i64 %16
  %18 = load i64, ptr %17, align 8, !tbaa !9
  %19 = add nsw i64 %18, %13
  store i64 %19, ptr %17, align 8, !tbaa !9
  br label %20

20:                                               ; preds = %12
  %21 = load i32, ptr %4, align 4, !tbaa !5
  %22 = call noundef i32 @_Z7low_biti(i32 noundef %21)
  %23 = load i32, ptr %4, align 4, !tbaa !5
  %24 = add nsw i32 %23, %22
  store i32 %24, ptr %4, align 4, !tbaa !5
  br label %7, !llvm.loop !13

25:                                               ; 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, !10, i64 0}
!10 = !{!"long long", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"any pointer", !7, i64 0}
!13 = distinct !{!13, !14}
!14 = !{!"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

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i32 @_Z7low_biti(i32 noundef) local_unnamed_addr #0

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_Z6modifyixPx(i32 noundef %0, i64 noundef %1, ptr nocapture noundef %2) local_unnamed_addr #0 {
  %4 = load i32, ptr @n, align 4, !tbaa !5
  %5 = add nsw i32 %4, 1
  %.not5 = icmp slt i32 %5, %0
  br i1 %.not5, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %3, %.lr.ph
  %.06 = phi i32 [ %11, %.lr.ph ], [ %0, %3 ]
  %6 = sext i32 %.06 to i64
  %7 = getelementptr inbounds i64, ptr %2, i64 %6
  %8 = load i64, ptr %7, align 8, !tbaa !9
  %9 = add nsw i64 %8, %1
  store i64 %9, ptr %7, align 8, !tbaa !9
  %10 = tail call noundef i32 @_Z7low_biti(i32 noundef %.06)
  %11 = add nsw i32 %10, %.06
  %12 = load i32, ptr @n, align 4, !tbaa !5
  %13 = add nsw i32 %12, 1
  %.not = icmp sgt i32 %11, %13
  br i1 %.not, label %._crit_edge, label %.lr.ph, !llvm.loop !11

._crit_edge:                                      ; preds = %.lr.ph, %3
  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, !10, i64 0}
!10 = !{!"long long", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}


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