; LLVM IR from CZWin32768/ACMICPC-Templates-in-Latex :: atl/codes/Tree/LvTrie.ll (Z4findi)

; 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"

@chd = external dso_local global [32000160 x [2 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 @_Z4findi(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 0, ptr %4, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #2
  store i32 31, ptr %5, align 4, !tbaa !5
  br label %7

7:                                                ; preds = %40, %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 %43

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 %3, align 4, !tbaa !5
  %17 = sext i32 %16 to i64
  %18 = getelementptr inbounds [32000160 x [2 x i32]], ptr @chd, i64 0, i64 %17
  %19 = load i32, ptr %6, align 4, !tbaa !5
  %20 = sext i32 %19 to i64
  %21 = getelementptr inbounds [2 x i32], ptr %18, i64 0, i64 %20
  %22 = load i32, ptr %21, align 4, !tbaa !5
  %23 = icmp eq i32 %22, -1
  br i1 %23, label %24, label %27

24:                                               ; preds = %11
  %25 = load i32, ptr %6, align 4, !tbaa !5
  %26 = xor i32 %25, 1
  store i32 %26, ptr %6, align 4, !tbaa !5
  br label %27

27:                                               ; preds = %24, %11
  %28 = load i32, ptr %3, align 4, !tbaa !5
  %29 = sext i32 %28 to i64
  %30 = getelementptr inbounds [32000160 x [2 x i32]], ptr @chd, i64 0, i64 %29
  %31 = load i32, ptr %6, align 4, !tbaa !5
  %32 = sext i32 %31 to i64
  %33 = getelementptr inbounds [2 x i32], ptr %30, i64 0, i64 %32
  %34 = load i32, ptr %33, align 4, !tbaa !5
  store i32 %34, ptr %3, align 4, !tbaa !5
  %35 = load i32, ptr %4, align 4, !tbaa !5
  %36 = shl i32 %35, 1
  store i32 %36, ptr %4, align 4, !tbaa !5
  %37 = load i32, ptr %6, align 4, !tbaa !5
  %38 = load i32, ptr %4, align 4, !tbaa !5
  %39 = or i32 %38, %37
  store i32 %39, ptr %4, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #2
  br label %40

40:                                               ; preds = %27
  %41 = load i32, ptr %5, align 4, !tbaa !5
  %42 = add nsw i32 %41, -1
  store i32 %42, ptr %5, align 4, !tbaa !5
  br label %7, !llvm.loop !9

43:                                               ; preds = %10
  %44 = load i32, ptr %4, 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 %44
}

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"

@chd = external dso_local local_unnamed_addr global [32000160 x [2 x i32]], align 16

; Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(read, argmem: none, inaccessiblemem: none) uwtable
define dso_local noundef i32 @_Z4findi(i32 noundef %0) local_unnamed_addr #0 {
  br label %3

2:                                                ; preds = %3
  ret i32 %30

3:                                                ; preds = %3, %1
  %.01318 = phi i32 [ 31, %1 ], [ %31, %3 ]
  %.01417 = phi i32 [ 0, %1 ], [ %30, %3 ]
  %.01516 = phi i32 [ 0, %1 ], [ %26, %3 ]
  %4 = lshr i32 %0, %.01318
  %5 = and i32 %4, 1
  %6 = sext i32 %.01516 to i64
  %7 = zext nneg i32 %5 to i64
  %8 = getelementptr inbounds [32000160 x [2 x i32]], ptr @chd, i64 0, i64 %6, i64 %7
  %9 = load i32, ptr %8, align 4, !tbaa !5
  %10 = icmp eq i32 %9, -1
  %11 = zext i1 %10 to i32
  %spec.select = xor i32 %5, %11
  %12 = zext nneg i32 %spec.select to i64
  %13 = getelementptr inbounds [32000160 x [2 x i32]], ptr @chd, i64 0, i64 %6, i64 %12
  %14 = load i32, ptr %13, align 4, !tbaa !5
  %15 = add nsw i32 %.01318, -1
  %16 = lshr i32 %0, %15
  %17 = and i32 %16, 1
  %18 = sext i32 %14 to i64
  %19 = zext nneg i32 %17 to i64
  %20 = getelementptr inbounds [32000160 x [2 x i32]], ptr @chd, i64 0, i64 %18, i64 %19
  %21 = load i32, ptr %20, align 4, !tbaa !5
  %22 = icmp eq i32 %21, -1
  %23 = zext i1 %22 to i32
  %spec.select.1 = xor i32 %17, %23
  %24 = zext nneg i32 %spec.select.1 to i64
  %25 = getelementptr inbounds [32000160 x [2 x i32]], ptr @chd, i64 0, i64 %18, i64 %24
  %26 = load i32, ptr %25, align 4, !tbaa !5
  %27 = shl i32 %.01417, 2
  %28 = shl nuw nsw i32 %spec.select, 1
  %29 = or disjoint i32 %27, %28
  %30 = or disjoint i32 %spec.select.1, %29
  %31 = add nsw i32 %.01318, -2
  %.not.1 = icmp eq i32 %15, 0
  br i1 %.not.1, 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,ReassociatePass,SROAPass,SimplifyCFGPass