; LLVM IR from viveakrt/Competitive-programing :: SPOJ/twist.ll (Z4initi)

; 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.node = type { i32, i32, i32, i8, ptr, ptr }

; 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: mustprogress uwtable
define dso_local noundef ptr @_Z4initi(i32 noundef %0) #1 {
  %2 = alloca i32, align 4
  %3 = alloca ptr, align 8
  %4 = alloca %struct.node, align 8
  store i32 %0, ptr %2, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #5
  %5 = call noalias noundef nonnull ptr @_Znwm(i64 noundef 32) #6
  store ptr %5, ptr %3, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 32, ptr %4) #5
  %6 = getelementptr inbounds %struct.node, ptr %4, i32 0, i32 0
  store i32 1, ptr %6, align 8, !tbaa !11
  %7 = getelementptr inbounds %struct.node, ptr %4, i32 0, i32 1
  %8 = load i32, ptr %2, align 4, !tbaa !5
  store i32 %8, ptr %7, align 4, !tbaa !14
  %9 = getelementptr inbounds %struct.node, ptr %4, i32 0, i32 2
  %10 = call i32 @rand() #5
  store i32 %10, ptr %9, align 8, !tbaa !15
  %11 = getelementptr inbounds %struct.node, ptr %4, i32 0, i32 3
  store i8 0, ptr %11, align 4, !tbaa !16
  %12 = getelementptr inbounds %struct.node, ptr %4, i32 0, i32 4
  store ptr null, ptr %12, align 8, !tbaa !17
  %13 = getelementptr inbounds %struct.node, ptr %4, i32 0, i32 5
  store ptr null, ptr %13, align 8, !tbaa !18
  %14 = load ptr, ptr %3, align 8, !tbaa !9
  call void @llvm.memcpy.p0.p0.i64(ptr align 8 %14, ptr align 8 %4, i64 32, i1 false), !tbaa.struct !19
  call void @llvm.lifetime.end.p0(i64 32, ptr %4) #5
  %15 = load ptr, ptr %3, align 8, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #5
  ret ptr %15
}

; Function Attrs: nobuiltin allocsize(0)
declare noundef nonnull ptr @_Znwm(i64 noundef) #2

; Function Attrs: nounwind
declare i32 @rand() #3

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: readwrite)
declare void @llvm.memcpy.p0.p0.i64(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, i64, i1 immarg) #4

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #2 = { nobuiltin allocsize(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 = { 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 #4 = { nocallback nofree nounwind willreturn memory(argmem: readwrite) }
attributes #5 = { nounwind }
attributes #6 = { builtin allocsize(0) }

!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 = !{!10, !10, i64 0}
!10 = !{!"any pointer", !7, i64 0}
!11 = !{!12, !6, i64 0}
!12 = !{!"_ZTS4node", !6, i64 0, !6, i64 4, !6, i64 8, !13, i64 12, !10, i64 16, !10, i64 24}
!13 = !{!"bool", !7, i64 0}
!14 = !{!12, !6, i64 4}
!15 = !{!12, !6, i64 8}
!16 = !{!12, !13, i64 12}
!17 = !{!12, !10, i64 16}
!18 = !{!12, !10, i64 24}
!19 = !{i64 0, i64 4, !5, i64 4, i64 4, !5, i64 8, i64 4, !5, i64 12, i64 1, !20, i64 16, i64 8, !9, i64 24, i64 8, !9}
!20 = !{!13, !13, 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: mustprogress uwtable
define dso_local noalias noundef nonnull ptr @_Z4initi(i32 noundef %0) local_unnamed_addr #0 {
  %2 = tail call noalias noundef nonnull dereferenceable(32) ptr @_Znwm(i64 noundef 32) #4
  %3 = tail call i32 @rand() #5
  store i32 1, ptr %2, align 8, !tbaa !5
  %.sroa.4.0..sroa_idx = getelementptr inbounds i8, ptr %2, i64 4
  store i32 %0, ptr %.sroa.4.0..sroa_idx, align 4, !tbaa !5
  %.sroa.5.0..sroa_idx = getelementptr inbounds i8, ptr %2, i64 8
  store i32 %3, ptr %.sroa.5.0..sroa_idx, align 8, !tbaa !5
  %.sroa.6.0..sroa_idx = getelementptr inbounds i8, ptr %2, i64 12
  store i8 0, ptr %.sroa.6.0..sroa_idx, align 4, !tbaa !9
  %.sroa.71.0..sroa_idx = getelementptr inbounds i8, ptr %2, i64 16
  tail call void @llvm.memset.p0.i64(ptr noundef nonnull align 8 dereferenceable(16) %.sroa.71.0..sroa_idx, i8 0, i64 16, i1 false)
  ret ptr %2
}

; Function Attrs: nobuiltin allocsize(0)
declare noundef nonnull ptr @_Znwm(i64 noundef) local_unnamed_addr #1

; Function Attrs: nounwind
declare i32 @rand() local_unnamed_addr #2

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #3

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 = { nobuiltin allocsize(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 "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 = { nocallback nofree nounwind willreturn memory(argmem: write) }
attributes #4 = { builtin allocsize(0) }
attributes #5 = { 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 = !{!10, !10, i64 0}
!10 = !{!"bool", !7, i64 0}


; Effective O3 passes: CorrelatedValuePropagationPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,MemCpyOptPass,PostOrderFunctionAttrsPass,SROAPass,TailCallElimPass