; LLVM IR from upupming/algorithm :: acwing/算法竞赛进阶指南/0x42-树状数组/243. 一个简单的整数问题2.ll (Z3addiii)

; 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 i64, align 8
@c = external dso_local global [2 x [100010 x i64]], align 16

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_Z3addiii(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 = %23, %3
  %8 = load i32, ptr %5, align 4, !tbaa !5
  %9 = sext i32 %8 to i64
  %10 = load i64, ptr @n, align 8, !tbaa !9
  %11 = icmp sle i64 %9, %10
  br i1 %11, label %12, label %30

12:                                               ; preds = %7
  %13 = load i32, ptr %6, align 4, !tbaa !5
  %14 = sext i32 %13 to i64
  %15 = load i32, ptr %4, align 4, !tbaa !5
  %16 = sext i32 %15 to i64
  %17 = getelementptr inbounds [2 x [100010 x i64]], ptr @c, i64 0, i64 %16
  %18 = load i32, ptr %5, align 4, !tbaa !5
  %19 = sext i32 %18 to i64
  %20 = getelementptr inbounds [100010 x i64], ptr %17, i64 0, i64 %19
  %21 = load i64, ptr %20, align 8, !tbaa !9
  %22 = add nsw i64 %21, %14
  store i64 %22, ptr %20, align 8, !tbaa !9
  br label %23

23:                                               ; preds = %12
  %24 = load i32, ptr %5, align 4, !tbaa !5
  %25 = load i32, ptr %5, align 4, !tbaa !5
  %26 = sub nsw i32 0, %25
  %27 = and i32 %24, %26
  %28 = load i32, ptr %5, align 4, !tbaa !5
  %29 = add nsw i32 %28, %27
  store i32 %29, ptr %5, align 4, !tbaa !5
  br label %7, !llvm.loop !11

30:                                               ; 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 = distinct !{!11, !12}
!12 = !{!"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 i64, align 8
@c = external dso_local local_unnamed_addr global [2 x [100010 x i64]], align 16

; Function Attrs: mustprogress nofree norecurse nosync nounwind memory(readwrite, argmem: none, inaccessiblemem: none) uwtable
define dso_local void @_Z3addiii(i32 noundef %0, i32 noundef %1, i32 noundef %2) local_unnamed_addr #0 {
  %4 = load i64, ptr @n, align 8, !tbaa !5
  %5 = sext i32 %1 to i64
  %.not8 = icmp slt i64 %4, %5
  br i1 %.not8, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %3
  %6 = sext i32 %2 to i64
  %7 = sext i32 %0 to i64
  br label %8

8:                                                ; preds = %.lr.ph, %8
  %9 = phi i64 [ %5, %.lr.ph ], [ %16, %8 ]
  %.09 = phi i32 [ %1, %.lr.ph ], [ %15, %8 ]
  %10 = getelementptr inbounds [2 x [100010 x i64]], ptr @c, i64 0, i64 %7, i64 %9
  %11 = load i64, ptr %10, align 8, !tbaa !5
  %12 = add nsw i64 %11, %6
  store i64 %12, ptr %10, align 8, !tbaa !5
  %13 = sub nsw i32 0, %.09
  %14 = and i32 %.09, %13
  %15 = add nsw i32 %14, %.09
  %16 = sext i32 %15 to i64
  %.not = icmp slt i64 %4, %16
  br i1 %.not, label %._crit_edge, label %8, !llvm.loop !9

._crit_edge:                                      ; preds = %8, %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, !6, i64 0}
!6 = !{!"long long", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}


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