; LLVM IR from simonaertssen/MIT-6.172-Performance-Engineering-of-Software-Systems :: Project 1 - Bit Hacks/everybit (bitarray)

; 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"

%struct.bitarray = type { i64, ptr }

@.str.1 = external hidden unnamed_addr constant [143 x i8], align 1
@.str.3 = external hidden unnamed_addr constant [44 x i8], align 1
@__PRETTY_FUNCTION__.bitarray_rotate = external hidden unnamed_addr constant [83 x i8], align 1

; 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: noreturn nounwind
declare void @__assert_fail(ptr noundef, ptr noundef, i32 noundef, ptr noundef) #1

; Function Attrs: nounwind uwtable
define dso_local void @bitarray_rotate(ptr noundef %0, i64 noundef %1, i64 noundef %2, i64 noundef %3) #2 {
  %5 = alloca ptr, align 8
  %6 = alloca i64, align 8
  %7 = alloca i64, align 8
  %8 = alloca i64, align 8
  %9 = alloca i64, align 8
  %10 = alloca i32, align 4
  store ptr %0, ptr %5, align 8, !tbaa !5
  store i64 %1, ptr %6, align 8, !tbaa !9
  store i64 %2, ptr %7, align 8, !tbaa !9
  store i64 %3, ptr %8, align 8, !tbaa !9
  %11 = load i64, ptr %6, align 8, !tbaa !9
  %12 = load i64, ptr %7, align 8, !tbaa !9
  %13 = add i64 %11, %12
  %14 = load ptr, ptr %5, align 8, !tbaa !5
  %15 = getelementptr inbounds %struct.bitarray, ptr %14, i32 0, i32 0
  %16 = load i64, ptr %15, align 8, !tbaa !11
  %17 = icmp ule i64 %13, %16
  br i1 %17, label %18, label %19

18:                                               ; preds = %4
  br label %20

19:                                               ; preds = %4
  call void @__assert_fail(ptr noundef @.str.3, ptr noundef @.str.1, i32 noundef 219, ptr noundef @__PRETTY_FUNCTION__.bitarray_rotate) #3
  unreachable

20:                                               ; preds = %18
  %21 = load i64, ptr %7, align 8, !tbaa !9
  %22 = icmp eq i64 %21, 0
  br i1 %22, label %23, label %24

23:                                               ; preds = %20
  br label %39

24:                                               ; preds = %20
  call void @llvm.lifetime.start.p0(i64 8, ptr %9) #4
  %25 = load i64, ptr %8, align 8, !tbaa !9
  %26 = sub nsw i64 0, %25
  %27 = load i64, ptr %7, align 8, !tbaa !9
  %28 = call i64 @modulo(i64 noundef %26, i64 noundef %27)
  store i64 %28, ptr %9, align 8, !tbaa !9
  %29 = load i64, ptr %9, align 8, !tbaa !9
  %30 = icmp eq i64 %29, 0
  br i1 %30, label %31, label %32

31:                                               ; preds = %24
  store i32 1, ptr %10, align 4
  br label %37

32:                                               ; preds = %24
  %33 = load ptr, ptr %5, align 8, !tbaa !5
  %34 = load i64, ptr %6, align 8, !tbaa !9
  %35 = load i64, ptr %7, align 8, !tbaa !9
  %36 = load i64, ptr %9, align 8, !tbaa !9
  call void @bitarray_rotate_reverse(ptr noundef %33, i64 noundef %34, i64 noundef %35, i64 noundef %36)
  store i32 0, ptr %10, align 4
  br label %37

37:                                               ; preds = %32, %31
  call void @llvm.lifetime.end.p0(i64 8, ptr %9) #4
  %38 = load i32, ptr %10, align 4
  switch i32 %38, label %40 [
    i32 0, label %39
    i32 1, label %39
  ]

39:                                               ; preds = %37, %37, %23
  ret void

40:                                               ; preds = %37
  unreachable
}

; Function Attrs: nounwind uwtable
declare dso_local i64 @modulo(i64 noundef, i64 noundef) #2

; Function Attrs: nounwind uwtable
declare hidden void @bitarray_rotate_reverse(ptr noundef, i64 noundef, i64 noundef, i64 noundef) #2

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { noreturn nounwind "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 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 #3 = { noreturn nounwind }
attributes #4 = { 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 = !{!12, !10, i64 0}
!12 = !{!"bitarray", !10, i64 0, !6, i64 8}


; 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"

@.str.1 = external hidden unnamed_addr constant [143 x i8], align 1
@.str.3 = external hidden unnamed_addr constant [44 x i8], align 1
@__PRETTY_FUNCTION__.bitarray_rotate = external hidden unnamed_addr constant [83 x i8], align 1

; Function Attrs: noreturn nounwind
declare void @__assert_fail(ptr noundef, ptr noundef, i32 noundef, ptr noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local void @bitarray_rotate(ptr noundef %0, i64 noundef %1, i64 noundef %2, i64 noundef %3) local_unnamed_addr #1 {
  %5 = add i64 %2, %1
  %6 = load i64, ptr %0, align 8, !tbaa !5
  %.not = icmp ugt i64 %5, %6
  br i1 %.not, label %7, label %8

7:                                                ; preds = %4
  tail call void @__assert_fail(ptr noundef nonnull @.str.3, ptr noundef nonnull @.str.1, i32 noundef 219, ptr noundef nonnull @__PRETTY_FUNCTION__.bitarray_rotate) #2
  unreachable

8:                                                ; preds = %4
  %9 = icmp eq i64 %2, 0
  br i1 %9, label %15, label %10

10:                                               ; preds = %8
  %11 = sub nsw i64 0, %3
  %12 = tail call i64 @modulo(i64 noundef %11, i64 noundef %2)
  %13 = icmp eq i64 %12, 0
  br i1 %13, label %15, label %14

14:                                               ; preds = %10
  tail call void @bitarray_rotate_reverse(ptr noundef nonnull %0, i64 noundef %1, i64 noundef %2, i64 noundef %12)
  br label %15

15:                                               ; preds = %14, %10, %8
  ret void
}

; Function Attrs: nounwind uwtable
declare dso_local i64 @modulo(i64 noundef, i64 noundef) local_unnamed_addr #1

; Function Attrs: nounwind uwtable
declare hidden void @bitarray_rotate_reverse(ptr noundef, i64 noundef, i64 noundef, i64 noundef) local_unnamed_addr #1

attributes #0 = { noreturn nounwind "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 #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 = { noreturn 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, !7, i64 0}
!6 = !{!"bitarray", !7, i64 0, !10, i64 8}
!7 = !{!"long", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"any pointer", !8, i64 0}


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