; LLVM IR from bnidia/push_swap :: init_stack (init_stack)

; 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.s_listc = type { i32, i32, i32, i32, i32, ptr, ptr }

; Function Attrs: nounwind uwtable
define dso_local ptr @init_stack(i32 noundef %0, ptr noundef %1) #0 {
  %3 = alloca i32, align 4
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  store i32 %0, ptr %3, align 4, !tbaa !5
  store ptr %1, ptr %4, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #3
  store ptr null, ptr %5, align 8, !tbaa !9
  %6 = load i32, ptr %3, align 4, !tbaa !5
  %7 = icmp eq i32 %6, 1
  br i1 %7, label %8, label %9

8:                                                ; preds = %2
  call void @exit(i32 noundef 0) #4
  unreachable

9:                                                ; preds = %2
  %10 = load ptr, ptr %4, align 8, !tbaa !9
  %11 = getelementptr inbounds ptr, ptr %10, i32 1
  store ptr %11, ptr %4, align 8, !tbaa !9
  %12 = load i32, ptr %3, align 4, !tbaa !5
  %13 = add nsw i32 %12, -1
  store i32 %13, ptr %3, align 4, !tbaa !5
  br label %14

14:                                               ; preds = %18, %9
  %15 = load i32, ptr %3, align 4, !tbaa !5
  %16 = add nsw i32 %15, -1
  store i32 %16, ptr %3, align 4, !tbaa !5
  %17 = icmp ne i32 %15, 0
  br i1 %17, label %18, label %22

18:                                               ; preds = %14
  %19 = load ptr, ptr %4, align 8, !tbaa !9
  %20 = getelementptr inbounds ptr, ptr %19, i32 1
  store ptr %20, ptr %4, align 8, !tbaa !9
  %21 = load ptr, ptr %19, align 8, !tbaa !9
  call void @parse_string(ptr noundef %5, ptr noundef %21)
  br label %14, !llvm.loop !11

22:                                               ; preds = %14
  %23 = load ptr, ptr %5, align 8, !tbaa !9
  %24 = getelementptr inbounds %struct.s_listc, ptr %23, i32 0, i32 6
  %25 = load ptr, ptr %24, align 8, !tbaa !13
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #3
  ret ptr %25
}

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

; Function Attrs: noreturn nounwind
declare void @exit(i32 noundef) #2

; Function Attrs: nounwind uwtable
declare hidden void @parse_string(ptr noundef, ptr noundef) #0

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #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 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { 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 #3 = { nounwind }
attributes #4 = { 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, !6, i64 0}
!6 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"any pointer", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}
!13 = !{!14, !10, i64 32}
!14 = !{!"s_listc", !6, i64 0, !6, i64 4, !6, i64 8, !6, i64 12, !6, i64 16, !10, i64 24, !10, i64 32}


; 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 ptr @init_stack(i32 noundef %0, ptr nocapture noundef readonly %1) local_unnamed_addr #0 {
  %3 = alloca ptr, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %3) #3
  store ptr null, ptr %3, align 8, !tbaa !5
  %4 = icmp eq i32 %0, 1
  br i1 %4, label %5, label %.lr.ph.preheader

.lr.ph.preheader:                                 ; preds = %2
  %.046 = add nsw i32 %0, -1
  br label %.lr.ph

5:                                                ; preds = %2
  tail call void @exit(i32 noundef 0) #4
  unreachable

.lr.ph:                                           ; preds = %.lr.ph.preheader, %.lr.ph
  %.049 = phi i32 [ %.04, %.lr.ph ], [ %.046, %.lr.ph.preheader ]
  %.pn8 = phi ptr [ %.0, %.lr.ph ], [ %1, %.lr.ph.preheader ]
  %.0 = getelementptr inbounds i8, ptr %.pn8, i64 8
  %6 = load ptr, ptr %.0, align 8, !tbaa !5
  call void @parse_string(ptr noundef nonnull %3, ptr noundef %6)
  %.04 = add nsw i32 %.049, -1
  %.not = icmp eq i32 %.04, 0
  br i1 %.not, label %._crit_edge, label %.lr.ph, !llvm.loop !9

._crit_edge:                                      ; preds = %.lr.ph
  %.pre = load ptr, ptr %3, align 8, !tbaa !5
  %7 = getelementptr inbounds i8, ptr %.pre, i64 32
  %8 = load ptr, ptr %7, align 8, !tbaa !11
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %3) #3
  ret ptr %8
}

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

; Function Attrs: noreturn nounwind
declare void @exit(i32 noundef) local_unnamed_addr #2

; Function Attrs: nounwind uwtable
declare hidden void @parse_string(ptr noundef, ptr noundef) local_unnamed_addr #0

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #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 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { 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 #3 = { nounwind }
attributes #4 = { 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, !6, i64 0}
!6 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}
!11 = !{!12, !6, i64 32}
!12 = !{!"s_listc", !13, i64 0, !13, i64 4, !13, i64 8, !13, i64 12, !13, i64 16, !6, i64 24, !6, i64 32}
!13 = !{!"int", !7, i64 0}


; Effective O3 passes: GVNPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass