; LLVM IR from AllAlgorithms/c :: algorithms/data-structures (bitmap)

; 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"

; 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: nounwind uwtable
declare hidden zeroext i8 @_get_mask(i64 noundef) #1

; Function Attrs: nounwind uwtable
define dso_local i32 @get_bit(ptr noundef %0, i64 noundef %1) #1 {
  %3 = alloca i32, align 4
  %4 = alloca ptr, align 8
  %5 = alloca i64, align 8
  %6 = alloca i64, align 8
  %7 = alloca i8, align 1
  store ptr %0, ptr %4, align 8, !tbaa !5
  store i64 %1, ptr %5, align 8, !tbaa !9
  %8 = load ptr, ptr %4, align 8, !tbaa !5
  %9 = icmp ne ptr %8, null
  br i1 %9, label %10, label %27

10:                                               ; preds = %2
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #2
  %11 = load i64, ptr %5, align 8, !tbaa !9
  %12 = udiv i64 %11, 8
  store i64 %12, ptr %6, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 1, ptr %7) #2
  %13 = load i64, ptr %5, align 8, !tbaa !9
  %14 = call zeroext i8 @_get_mask(i64 noundef %13)
  store i8 %14, ptr %7, align 1, !tbaa !11
  %15 = load ptr, ptr %4, align 8, !tbaa !5
  %16 = load i64, ptr %6, align 8, !tbaa !9
  %17 = getelementptr inbounds i8, ptr %15, i64 %16
  %18 = load i8, ptr %17, align 1, !tbaa !11
  %19 = zext i8 %18 to i32
  %20 = load i8, ptr %7, align 1, !tbaa !11
  %21 = zext i8 %20 to i32
  %22 = and i32 %19, %21
  %23 = icmp ne i32 %22, 0
  %24 = xor i1 %23, true
  %25 = xor i1 %24, true
  %26 = zext i1 %25 to i32
  store i32 %26, ptr %3, align 4
  call void @llvm.lifetime.end.p0(i64 1, ptr %7) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #2
  br label %28

27:                                               ; preds = %2
  store i32 0, ptr %3, align 4
  br label %28

28:                                               ; preds = %27, %10
  %29 = load i32, ptr %3, align 4
  ret i32 %29
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"long", !7, i64 0}
!11 = !{!7, !7, i64 0}


; 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"

; Function Attrs: nounwind uwtable
declare hidden zeroext i8 @_get_mask(i64 noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local range(i32 0, 2) i32 @get_bit(ptr noundef readonly %0, i64 noundef %1) local_unnamed_addr #0 {
  %.not = icmp eq ptr %0, null
  br i1 %.not, label %11, label %3

3:                                                ; preds = %2
  %4 = lshr i64 %1, 3
  %5 = tail call zeroext i8 @_get_mask(i64 noundef %1)
  %6 = getelementptr inbounds i8, ptr %0, i64 %4
  %7 = load i8, ptr %6, align 1, !tbaa !5
  %8 = and i8 %7, %5
  %9 = icmp ne i8 %8, 0
  %10 = zext i1 %9 to i32
  br label %11

11:                                               ; preds = %2, %3
  %.0 = phi i32 [ %10, %3 ], [ 0, %2 ]
  ret i32 %.0
}

attributes #0 = { 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 = !{!"omnipotent char", !7, i64 0}
!7 = !{!"Simple C/C++ TBAA"}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass