; LLVM IR from ritikbanger/Hacktoberfest2022-DSA :: 01. Mathematics/centroid-decomposition.ll (Z11getCentroidi)

; 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"

@centroidMarked = external dso_local global [1025 x i8], align 16

; Function Attrs: mustprogress uwtable
declare dso_local void @_Z3DFSiPbPiS0_(i32 noundef, ptr noundef, ptr noundef, ptr 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
declare dso_local noundef i32 @_Z11getCentroidiPbPii(i32 noundef, ptr noundef, ptr noundef, i32 noundef) #0

; Function Attrs: mustprogress uwtable
define dso_local noundef i32 @_Z11getCentroidi(i32 noundef %0) #0 {
  %2 = alloca i32, align 4
  %3 = alloca [1025 x i8], align 16
  %4 = alloca [1025 x i32], align 16
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  store i32 %0, ptr %2, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 1025, ptr %3) #3
  call void @llvm.lifetime.start.p0(i64 4100, ptr %4) #3
  %8 = getelementptr inbounds [1025 x i8], ptr %3, i64 0, i64 0
  call void @llvm.memset.p0.i64(ptr align 16 %8, i8 0, i64 1025, i1 false)
  %9 = getelementptr inbounds [1025 x i32], ptr %4, i64 0, i64 0
  call void @llvm.memset.p0.i64(ptr align 16 %9, i8 0, i64 4100, i1 false)
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #3
  store i32 0, ptr %5, align 4, !tbaa !5
  %10 = load i32, ptr %2, align 4, !tbaa !5
  %11 = getelementptr inbounds [1025 x i8], ptr %3, i64 0, i64 0
  %12 = getelementptr inbounds [1025 x i32], ptr %4, i64 0, i64 0
  call void @_Z3DFSiPbPiS0_(i32 noundef %10, ptr noundef %11, ptr noundef %12, ptr noundef %5)
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #3
  store i32 1, ptr %6, align 4, !tbaa !5
  br label %13

13:                                               ; preds = %21, %1
  %14 = load i32, ptr %6, align 4, !tbaa !5
  %15 = icmp slt i32 %14, 1025
  br i1 %15, label %17, label %16

16:                                               ; preds = %13
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #3
  br label %24

17:                                               ; preds = %13
  %18 = load i32, ptr %6, align 4, !tbaa !5
  %19 = sext i32 %18 to i64
  %20 = getelementptr inbounds [1025 x i8], ptr %3, i64 0, i64 %19
  store i8 0, ptr %20, align 1, !tbaa !9
  br label %21

21:                                               ; preds = %17
  %22 = load i32, ptr %6, align 4, !tbaa !5
  %23 = add nsw i32 %22, 1
  store i32 %23, ptr %6, align 4, !tbaa !5
  br label %13, !llvm.loop !11

24:                                               ; preds = %16
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #3
  %25 = load i32, ptr %2, align 4, !tbaa !5
  %26 = getelementptr inbounds [1025 x i8], ptr %3, i64 0, i64 0
  %27 = getelementptr inbounds [1025 x i32], ptr %4, i64 0, i64 0
  %28 = load i32, ptr %5, align 4, !tbaa !5
  %29 = call noundef i32 @_Z11getCentroidiPbPii(i32 noundef %25, ptr noundef %26, ptr noundef %27, i32 noundef %28)
  store i32 %29, ptr %7, align 4, !tbaa !5
  %30 = load i32, ptr %7, align 4, !tbaa !5
  %31 = sext i32 %30 to i64
  %32 = getelementptr inbounds [1025 x i8], ptr @centroidMarked, i64 0, i64 %31
  store i8 1, ptr %32, align 1, !tbaa !9
  %33 = load i32, ptr %7, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #3
  call void @llvm.lifetime.end.p0(i64 4100, ptr %4) #3
  call void @llvm.lifetime.end.p0(i64 1025, ptr %3) #3
  ret i32 %33
}

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #2

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 = { nocallback nofree nounwind willreturn memory(argmem: write) }
attributes #3 = { 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}
!11 = distinct !{!11, !12}
!12 = !{!"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"

@centroidMarked = external dso_local local_unnamed_addr global [1025 x i8], align 16

; Function Attrs: mustprogress uwtable
declare dso_local void @_Z3DFSiPbPiS0_(i32 noundef, ptr noundef, ptr noundef, ptr noundef) local_unnamed_addr #0

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

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

; Function Attrs: mustprogress uwtable
declare dso_local noundef i32 @_Z11getCentroidiPbPii(i32 noundef, ptr noundef, ptr noundef, i32 noundef) local_unnamed_addr #0

; Function Attrs: mustprogress uwtable
define dso_local noundef i32 @_Z11getCentroidi(i32 noundef %0) local_unnamed_addr #0 {
  %2 = alloca [1025 x i8], align 16
  %3 = alloca [1025 x i32], align 16
  %4 = alloca i32, align 4
  call void @llvm.lifetime.start.p0(i64 1025, ptr nonnull %2) #3
  call void @llvm.lifetime.start.p0(i64 4100, ptr nonnull %3) #3
  call void @llvm.memset.p0.i64(ptr noundef nonnull align 16 dereferenceable(1025) %2, i8 0, i64 1025, i1 false)
  call void @llvm.memset.p0.i64(ptr noundef nonnull align 16 dereferenceable(4100) %3, i8 0, i64 4100, i1 false)
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %4) #3
  store i32 0, ptr %4, align 4, !tbaa !5
  call void @_Z3DFSiPbPiS0_(i32 noundef %0, ptr noundef nonnull %2, ptr noundef nonnull %3, ptr noundef nonnull %4)
  %scevgep = getelementptr inbounds i8, ptr %2, i64 1
  call void @llvm.memset.p0.i64(ptr noundef nonnull align 1 dereferenceable(1024) %scevgep, i8 0, i64 1024, i1 false), !tbaa !9
  %5 = load i32, ptr %4, align 4, !tbaa !5
  %6 = call noundef i32 @_Z11getCentroidiPbPii(i32 noundef %0, ptr noundef nonnull %2, ptr noundef nonnull %3, i32 noundef %5)
  %7 = sext i32 %6 to i64
  %8 = getelementptr inbounds [1025 x i8], ptr @centroidMarked, i64 0, i64 %7
  store i8 1, ptr %8, align 1, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %4) #3
  call void @llvm.lifetime.end.p0(i64 4100, ptr nonnull %3) #3
  call void @llvm.lifetime.end.p0(i64 1025, ptr nonnull %2) #3
  ret i32 %6
}

; Function Attrs: mustprogress nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #2

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 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { mustprogress nocallback nofree nounwind willreturn memory(argmem: write) }
attributes #3 = { 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: EarlyCSEPass,GVNPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,LoopIdiomRecognizePass,LoopRotatePass,SROAPass,SimplifyCFGPass