; LLVM IR from abeaumont/competitive-programming :: hackerrank/data-structures/waiter.ll (Z11calc_primesi)

; 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"

@primes = external dso_local global [1201 x i32], align 16

; Function Attrs: mustprogress uwtable
declare dso_local noundef zeroext i1 @_Z8is_primei(i32 noundef) #0

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: mustprogress uwtable
define dso_local void @_Z11calc_primesi(i32 noundef %0) #0 {
  %2 = alloca i32, align 4
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  store i32 %0, ptr %2, align 4, !tbaa !5
  store i32 2, ptr @primes, align 16, !tbaa !5
  store i32 3, ptr getelementptr inbounds ([1201 x i32], ptr @primes, i64 0, i64 1), align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #2
  store i32 2, ptr %3, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #2
  store i32 5, ptr %4, align 4, !tbaa !5
  br label %5

5:                                                ; preds = %21, %1
  %6 = load i32, ptr %3, align 4, !tbaa !5
  %7 = load i32, ptr %2, align 4, !tbaa !5
  %8 = icmp slt i32 %6, %7
  br i1 %8, label %10, label %9

9:                                                ; preds = %5
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #2
  br label %24

10:                                               ; preds = %5
  %11 = load i32, ptr %4, align 4, !tbaa !5
  %12 = call noundef zeroext i1 @_Z8is_primei(i32 noundef %11)
  br i1 %12, label %13, label %20

13:                                               ; preds = %10
  %14 = load i32, ptr %4, align 4, !tbaa !5
  %15 = load i32, ptr %3, align 4, !tbaa !5
  %16 = sext i32 %15 to i64
  %17 = getelementptr inbounds [1201 x i32], ptr @primes, i64 0, i64 %16
  store i32 %14, ptr %17, align 4, !tbaa !5
  %18 = load i32, ptr %3, align 4, !tbaa !5
  %19 = add nsw i32 %18, 1
  store i32 %19, ptr %3, align 4, !tbaa !5
  br label %20

20:                                               ; preds = %13, %10
  br label %21

21:                                               ; preds = %20
  %22 = load i32, ptr %4, align 4, !tbaa !5
  %23 = add nsw i32 %22, 1
  store i32 %23, ptr %4, align 4, !tbaa !5
  br label %5, !llvm.loop !9

24:                                               ; preds = %9
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #2
  ret void
}

attributes #0 = { mustprogress 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 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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"

@primes = external dso_local local_unnamed_addr global [1201 x i32], align 16

; Function Attrs: mustprogress uwtable
declare dso_local noundef zeroext i1 @_Z8is_primei(i32 noundef) local_unnamed_addr #0

; Function Attrs: mustprogress uwtable
define dso_local void @_Z11calc_primesi(i32 noundef %0) local_unnamed_addr #0 {
  store i32 2, ptr @primes, align 16, !tbaa !5
  store i32 3, ptr getelementptr inbounds (i8, ptr @primes, i64 4), align 4, !tbaa !5
  %2 = icmp sgt i32 %0, 2
  br i1 %2, label %.lr.ph, label %._crit_edge

._crit_edge:                                      ; preds = %8, %1
  ret void

.lr.ph:                                           ; preds = %1, %8
  %.09 = phi i32 [ %9, %8 ], [ 5, %1 ]
  %.078 = phi i32 [ %.1, %8 ], [ 2, %1 ]
  %3 = tail call noundef zeroext i1 @_Z8is_primei(i32 noundef %.09)
  br i1 %3, label %4, label %8

4:                                                ; preds = %.lr.ph
  %5 = sext i32 %.078 to i64
  %6 = getelementptr inbounds [1201 x i32], ptr @primes, i64 0, i64 %5
  store i32 %.09, ptr %6, align 4, !tbaa !5
  %7 = add nsw i32 %.078, 1
  br label %8

8:                                                ; preds = %.lr.ph, %4
  %.1 = phi i32 [ %7, %4 ], [ %.078, %.lr.ph ]
  %9 = add nuw nsw i32 %.09, 1
  %10 = icmp slt i32 %.1, %0
  br i1 %10, label %.lr.ph, label %._crit_edge, !llvm.loop !9
}

attributes #0 = { mustprogress 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: GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimplifyCFGPass,TailCallElimPass