; LLVM IR from lzyrapx/Competitive-Programming :: HDUOJ/5452（在线LCA）.ll (Z3RMQii)

; 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"

@dp = external dso_local global [160014 x [26 x i32]], align 16
@R = external dso_local global [160014 x i32], align 16

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef i32 @_Z3RMQii(i32 noundef %0, i32 noundef %1) #1 {
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  store i32 %0, ptr %3, align 4, !tbaa !5
  store i32 %1, ptr %4, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #2
  store i32 0, ptr %5, align 4, !tbaa !5
  br label %8

8:                                                ; preds = %17, %2
  %9 = load i32, ptr %5, align 4, !tbaa !5
  %10 = add nsw i32 %9, 1
  %11 = shl i32 1, %10
  %12 = load i32, ptr %4, align 4, !tbaa !5
  %13 = load i32, ptr %3, align 4, !tbaa !5
  %14 = sub nsw i32 %12, %13
  %15 = add nsw i32 %14, 1
  %16 = icmp sle i32 %11, %15
  br i1 %16, label %17, label %20

17:                                               ; preds = %8
  %18 = load i32, ptr %5, align 4, !tbaa !5
  %19 = add nsw i32 %18, 1
  store i32 %19, ptr %5, align 4, !tbaa !5
  br label %8, !llvm.loop !9

20:                                               ; preds = %8
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #2
  %21 = load i32, ptr %3, align 4, !tbaa !5
  %22 = sext i32 %21 to i64
  %23 = getelementptr inbounds [160014 x [26 x i32]], ptr @dp, i64 0, i64 %22
  %24 = load i32, ptr %5, align 4, !tbaa !5
  %25 = sext i32 %24 to i64
  %26 = getelementptr inbounds [26 x i32], ptr %23, i64 0, i64 %25
  %27 = load i32, ptr %26, align 4, !tbaa !5
  store i32 %27, ptr %6, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #2
  %28 = load i32, ptr %4, align 4, !tbaa !5
  %29 = load i32, ptr %5, align 4, !tbaa !5
  %30 = shl i32 1, %29
  %31 = sub nsw i32 %28, %30
  %32 = add nsw i32 %31, 1
  %33 = sext i32 %32 to i64
  %34 = getelementptr inbounds [160014 x [26 x i32]], ptr @dp, i64 0, i64 %33
  %35 = load i32, ptr %5, align 4, !tbaa !5
  %36 = sext i32 %35 to i64
  %37 = getelementptr inbounds [26 x i32], ptr %34, i64 0, i64 %36
  %38 = load i32, ptr %37, align 4, !tbaa !5
  store i32 %38, ptr %7, align 4, !tbaa !5
  %39 = load i32, ptr %6, align 4, !tbaa !5
  %40 = sext i32 %39 to i64
  %41 = getelementptr inbounds [160014 x i32], ptr @R, i64 0, i64 %40
  %42 = load i32, ptr %41, align 4, !tbaa !5
  %43 = load i32, ptr %7, align 4, !tbaa !5
  %44 = sext i32 %43 to i64
  %45 = getelementptr inbounds [160014 x i32], ptr @R, i64 0, i64 %44
  %46 = load i32, ptr %45, align 4, !tbaa !5
  %47 = icmp slt i32 %42, %46
  br i1 %47, label %48, label %50

48:                                               ; preds = %20
  %49 = load i32, ptr %6, align 4, !tbaa !5
  br label %52

50:                                               ; preds = %20
  %51 = load i32, ptr %7, align 4, !tbaa !5
  br label %52

52:                                               ; preds = %50, %48
  %53 = phi i32 [ %49, %48 ], [ %51, %50 ]
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #2
  ret i32 %53
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #2 = { nounwind }

!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"

@dp = external dso_local local_unnamed_addr global [160014 x [26 x i32]], align 16
@R = external dso_local local_unnamed_addr global [160014 x i32], align 16

; Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(read, argmem: none, inaccessiblemem: none) uwtable
define dso_local noundef i32 @_Z3RMQii(i32 noundef %0, i32 noundef %1) local_unnamed_addr #0 {
  %reass.sub = sub i32 %1, %0
  %3 = add i32 %reass.sub, 1
  br label %4

4:                                                ; preds = %4, %2
  %.0 = phi i32 [ 0, %2 ], [ %6, %4 ]
  %5 = shl nuw i32 2, %.0
  %.not = icmp sgt i32 %5, %3
  %6 = add nuw nsw i32 %.0, 1
  br i1 %.not, label %7, label %4, !llvm.loop !5

7:                                                ; preds = %4
  %8 = sext i32 %0 to i64
  %9 = zext nneg i32 %.0 to i64
  %10 = getelementptr inbounds [160014 x [26 x i32]], ptr @dp, i64 0, i64 %8, i64 %9
  %11 = load i32, ptr %10, align 4, !tbaa !7
  %.neg = shl nsw i32 -1, %.0
  %12 = add i32 %1, 1
  %13 = add i32 %12, %.neg
  %14 = sext i32 %13 to i64
  %15 = getelementptr inbounds [160014 x [26 x i32]], ptr @dp, i64 0, i64 %14, i64 %9
  %16 = load i32, ptr %15, align 4, !tbaa !7
  %17 = sext i32 %11 to i64
  %18 = getelementptr inbounds [160014 x i32], ptr @R, i64 0, i64 %17
  %19 = load i32, ptr %18, align 4, !tbaa !7
  %20 = sext i32 %16 to i64
  %21 = getelementptr inbounds [160014 x i32], ptr @R, i64 0, i64 %20
  %22 = load i32, ptr %21, align 4, !tbaa !7
  %23 = icmp slt i32 %19, %22
  %24 = select i1 %23, i32 %11, i32 %16
  ret i32 %24
}

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" }

!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 = distinct !{!5, !6}
!6 = !{!"llvm.loop.mustprogress"}
!7 = !{!8, !8, i64 0}
!8 = !{!"int", !9, i64 0}
!9 = !{!"omnipotent char", !10, i64 0}
!10 = !{!"Simple C++ TBAA"}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,LCSSAPass,LICMPass,LoopRotatePass,LoopUnrollPass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass