; LLVM IR from ponylang/ponyc :: src/libponyrt/ds (fun)

; 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: nounwind uwtable
define dso_local i64 @ponyint_next_pow2(i64 noundef %0) #0 {
  %2 = alloca i64, align 8
  store i64 %0, ptr %2, align 8, !tbaa !5
  %3 = load i64, ptr %2, align 8, !tbaa !5
  %4 = add i64 %3, -1
  store i64 %4, ptr %2, align 8, !tbaa !5
  %5 = load i64, ptr %2, align 8, !tbaa !5
  %6 = icmp eq i64 %5, 0
  br i1 %6, label %7, label %8

7:                                                ; preds = %1
  store i64 64, ptr %2, align 8, !tbaa !5
  br label %12

8:                                                ; preds = %1
  %9 = load i64, ptr %2, align 8, !tbaa !5
  %10 = call i32 @__pony_clzzu(i64 noundef %9)
  %11 = zext i32 %10 to i64
  store i64 %11, ptr %2, align 8, !tbaa !5
  br label %12

12:                                               ; preds = %8, %7
  %13 = load i64, ptr %2, align 8, !tbaa !5
  %14 = icmp eq i64 %13, 0
  br i1 %14, label %15, label %16

15:                                               ; preds = %12
  br label %19

16:                                               ; preds = %12
  %17 = load i64, ptr %2, align 8, !tbaa !5
  %18 = sub i64 64, %17
  br label %19

19:                                               ; preds = %16, %15
  %20 = phi i64 [ 0, %15 ], [ %18, %16 ]
  %21 = shl i64 1, %20
  ret i64 %21
}

; Function Attrs: inlinehint nounwind uwtable
declare i32 @__pony_clzzu(i64 noundef) #1

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" }
attributes #1 = { inlinehint 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 = !{!"long", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}


; 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
define dso_local i64 @ponyint_next_pow2(i64 noundef %0) local_unnamed_addr #0 {
  %2 = add i64 %0, -1
  %3 = icmp eq i64 %2, 0
  br i1 %3, label %.thread, label %4

4:                                                ; preds = %1
  %5 = tail call i32 @__pony_clzzu(i64 noundef %2)
  %.fr = freeze i32 %5
  %6 = zext i32 %.fr to i64
  %7 = icmp eq i32 %.fr, 0
  %8 = sub nsw i64 64, %6
  %9 = shl nuw i64 1, %8
  %spec.select = select i1 %7, i64 1, i64 %9
  br label %.thread

.thread:                                          ; preds = %4, %1
  %10 = phi i64 [ 1, %1 ], [ %spec.select, %4 ]
  ret i64 %10
}

; Function Attrs: inlinehint nounwind uwtable
declare i32 @__pony_clzzu(i64 noundef) local_unnamed_addr #1

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" }
attributes #1 = { inlinehint 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)"}


; Effective O3 passes: GlobalOptPass,IPSCCPPass,InstCombinePass,JumpThreadingPass,SROAPass,SimplifyCFGPass,TailCallElimPass