; LLVM IR from upupming/algorithm :: acwing/每日一题·夏季/Week 1/AcWing 3485. 最大异或和.ll (Z5queryi)

; 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"

@trie = external dso_local global [3200010 x [2 x i32]], align 16
@cnt = external dso_local global [3200010 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 @_Z5queryi(i32 noundef %0) #1 {
  %2 = alloca i32, align 4
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  store i32 %0, ptr %2, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #2
  store i32 0, ptr %3, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #2
  store i32 1, ptr %4, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #2
  store i32 30, ptr %5, align 4, !tbaa !5
  br label %7

7:                                                ; preds = %52, %1
  %8 = load i32, ptr %5, align 4, !tbaa !5
  %9 = icmp sge i32 %8, 0
  br i1 %9, label %11, label %10

10:                                               ; preds = %7
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #2
  br label %55

11:                                               ; preds = %7
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #2
  %12 = load i32, ptr %2, align 4, !tbaa !5
  %13 = load i32, ptr %5, align 4, !tbaa !5
  %14 = ashr i32 %12, %13
  %15 = and i32 %14, 1
  store i32 %15, ptr %6, align 4, !tbaa !5
  %16 = load i32, ptr %4, align 4, !tbaa !5
  %17 = sext i32 %16 to i64
  %18 = getelementptr inbounds [3200010 x [2 x i32]], ptr @trie, i64 0, i64 %17
  %19 = load i32, ptr %6, align 4, !tbaa !5
  %20 = icmp ne i32 %19, 0
  %21 = xor i1 %20, true
  %22 = zext i1 %21 to i64
  %23 = getelementptr inbounds [2 x i32], ptr %18, i64 0, i64 %22
  %24 = load i32, ptr %23, align 4, !tbaa !5
  %25 = sext i32 %24 to i64
  %26 = getelementptr inbounds [3200010 x i32], ptr @cnt, i64 0, i64 %25
  %27 = load i32, ptr %26, align 4, !tbaa !5
  %28 = icmp ne i32 %27, 0
  br i1 %28, label %29, label %43

29:                                               ; preds = %11
  %30 = load i32, ptr %4, align 4, !tbaa !5
  %31 = sext i32 %30 to i64
  %32 = getelementptr inbounds [3200010 x [2 x i32]], ptr @trie, i64 0, i64 %31
  %33 = load i32, ptr %6, align 4, !tbaa !5
  %34 = icmp ne i32 %33, 0
  %35 = xor i1 %34, true
  %36 = zext i1 %35 to i64
  %37 = getelementptr inbounds [2 x i32], ptr %32, i64 0, i64 %36
  %38 = load i32, ptr %37, align 4, !tbaa !5
  store i32 %38, ptr %4, align 4, !tbaa !5
  %39 = load i32, ptr %5, align 4, !tbaa !5
  %40 = shl i32 1, %39
  %41 = load i32, ptr %3, align 4, !tbaa !5
  %42 = or i32 %41, %40
  store i32 %42, ptr %3, align 4, !tbaa !5
  br label %51

43:                                               ; preds = %11
  %44 = load i32, ptr %4, align 4, !tbaa !5
  %45 = sext i32 %44 to i64
  %46 = getelementptr inbounds [3200010 x [2 x i32]], ptr @trie, i64 0, i64 %45
  %47 = load i32, ptr %6, align 4, !tbaa !5
  %48 = sext i32 %47 to i64
  %49 = getelementptr inbounds [2 x i32], ptr %46, i64 0, i64 %48
  %50 = load i32, ptr %49, align 4, !tbaa !5
  store i32 %50, ptr %4, align 4, !tbaa !5
  br label %51

51:                                               ; preds = %43, %29
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #2
  br label %52

52:                                               ; preds = %51
  %53 = load i32, ptr %5, align 4, !tbaa !5
  %54 = add nsw i32 %53, -1
  store i32 %54, ptr %5, align 4, !tbaa !5
  br label %7, !llvm.loop !9

55:                                               ; preds = %10
  %56 = load i32, ptr %3, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #2
  ret i32 %56
}

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"

@trie = external dso_local local_unnamed_addr global [3200010 x [2 x i32]], align 16
@cnt = external dso_local local_unnamed_addr global [3200010 x i32], align 16

; Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(read, argmem: none, inaccessiblemem: none) uwtable
define dso_local noundef i32 @_Z5queryi(i32 noundef %0) local_unnamed_addr #0 {
  br label %3

2:                                                ; preds = %21
  ret i32 %.1

3:                                                ; preds = %1, %21
  %.018 = phi i32 [ 0, %1 ], [ %.1, %21 ]
  %.01317 = phi i32 [ 30, %1 ], [ %22, %21 ]
  %.01416 = phi i32 [ 1, %1 ], [ %.115, %21 ]
  %4 = lshr i32 %0, %.01317
  %5 = and i32 %4, 1
  %6 = sext i32 %.01416 to i64
  %7 = xor i32 %5, 1
  %8 = zext nneg i32 %7 to i64
  %9 = getelementptr inbounds [3200010 x [2 x i32]], ptr @trie, i64 0, i64 %6, i64 %8
  %10 = load i32, ptr %9, align 4, !tbaa !5
  %11 = sext i32 %10 to i64
  %12 = getelementptr inbounds [3200010 x i32], ptr @cnt, i64 0, i64 %11
  %13 = load i32, ptr %12, align 4, !tbaa !5
  %.not = icmp eq i32 %13, 0
  br i1 %.not, label %17, label %14

14:                                               ; preds = %3
  %15 = shl nuw i32 1, %.01317
  %16 = or i32 %.018, %15
  br label %21

17:                                               ; preds = %3
  %18 = zext nneg i32 %5 to i64
  %19 = getelementptr inbounds [3200010 x [2 x i32]], ptr @trie, i64 0, i64 %6, i64 %18
  %20 = load i32, ptr %19, align 4, !tbaa !5
  br label %21

21:                                               ; preds = %17, %14
  %.115 = phi i32 [ %10, %14 ], [ %20, %17 ]
  %.1 = phi i32 [ %16, %14 ], [ %.018, %17 ]
  %22 = add nsw i32 %.01317, -1
  %.not19 = icmp eq i32 %.01317, 0
  br i1 %.not19, label %2, label %3, !llvm.loop !9
}

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 = !{!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: EarlyCSEPass,GVNPass,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,LCSSAPass,LoopRotatePass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass