; LLVM IR from NaokiHori/VerySimpleNSSolver :: src (array)

; 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 i32 @array_init(i64 noundef %0, i64 noundef %1, ptr noundef %2) #0 {
  %4 = alloca i64, align 8
  %5 = alloca i64, align 8
  %6 = alloca ptr, align 8
  %7 = alloca ptr, align 8
  %8 = alloca i64, align 8
  store i64 %0, ptr %4, align 8, !tbaa !5
  store i64 %1, ptr %5, align 8, !tbaa !5
  store ptr %2, ptr %6, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #3
  %9 = load i64, ptr %4, align 8, !tbaa !5
  %10 = load i64, ptr %5, align 8, !tbaa !5
  %11 = mul i64 %9, %10
  %12 = call ptr @memory_alloc(i64 noundef %11, i64 noundef 8)
  store ptr %12, ptr %7, align 8, !tbaa !9
  %13 = load i64, ptr %5, align 8, !tbaa !5
  %14 = call ptr @memory_alloc(i64 noundef %13, i64 noundef 8)
  %15 = load ptr, ptr %6, align 8, !tbaa !9
  store ptr %14, ptr %15, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #3
  store i64 0, ptr %8, align 8, !tbaa !5
  br label %16

16:                                               ; preds = %31, %3
  %17 = load i64, ptr %8, align 8, !tbaa !5
  %18 = load i64, ptr %5, align 8, !tbaa !5
  %19 = icmp ult i64 %17, %18
  br i1 %19, label %21, label %20

20:                                               ; preds = %16
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #3
  br label %34

21:                                               ; preds = %16
  %22 = load ptr, ptr %7, align 8, !tbaa !9
  %23 = load i64, ptr %4, align 8, !tbaa !5
  %24 = load i64, ptr %8, align 8, !tbaa !5
  %25 = mul i64 %23, %24
  %26 = getelementptr inbounds double, ptr %22, i64 %25
  %27 = load ptr, ptr %6, align 8, !tbaa !9
  %28 = load ptr, ptr %27, align 8, !tbaa !9
  %29 = load i64, ptr %8, align 8, !tbaa !5
  %30 = getelementptr inbounds ptr, ptr %28, i64 %29
  store ptr %26, ptr %30, align 8, !tbaa !9
  br label %31

31:                                               ; preds = %21
  %32 = load i64, ptr %8, align 8, !tbaa !5
  %33 = add i64 %32, 1
  store i64 %33, ptr %8, align 8, !tbaa !5
  br label %16, !llvm.loop !11

34:                                               ; preds = %20
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #3
  ret i32 0
}

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

declare ptr @memory_alloc(i64 noundef, i64 noundef) #2

; 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 = { "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 }

!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"}
!9 = !{!10, !10, i64 0}
!10 = !{!"any pointer", !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"

; Function Attrs: nounwind uwtable
define dso_local noundef i32 @array_init(i64 noundef %0, i64 noundef %1, ptr nocapture noundef %2) local_unnamed_addr #0 {
  %4 = mul i64 %1, %0
  %5 = tail call ptr @memory_alloc(i64 noundef %4, i64 noundef 8) #2
  %6 = tail call ptr @memory_alloc(i64 noundef %1, i64 noundef 8) #2
  store ptr %6, ptr %2, align 8, !tbaa !5
  %.not = icmp eq i64 %1, 0
  br i1 %.not, label %._crit_edge, label %.lr.ph.preheader

.lr.ph.preheader:                                 ; preds = %3
  %xtraiter = and i64 %1, 3
  %7 = icmp ult i64 %1, 4
  br i1 %7, label %._crit_edge.loopexit.unr-lcssa, label %.lr.ph.preheader.new

.lr.ph.preheader.new:                             ; preds = %.lr.ph.preheader
  %unroll_iter = and i64 %1, -4
  br label %.lr.ph

._crit_edge.loopexit.unr-lcssa:                   ; preds = %.lr.ph, %.lr.ph.preheader
  %.011.unr = phi i64 [ 0, %.lr.ph.preheader ], [ %32, %.lr.ph ]
  %lcmp.mod.not = icmp eq i64 %xtraiter, 0
  br i1 %lcmp.mod.not, label %._crit_edge, label %.lr.ph.epil

.lr.ph.epil:                                      ; preds = %._crit_edge.loopexit.unr-lcssa, %.lr.ph.epil
  %.011.epil = phi i64 [ %12, %.lr.ph.epil ], [ %.011.unr, %._crit_edge.loopexit.unr-lcssa ]
  %epil.iter = phi i64 [ %epil.iter.next, %.lr.ph.epil ], [ 0, %._crit_edge.loopexit.unr-lcssa ]
  %8 = mul i64 %.011.epil, %0
  %9 = getelementptr inbounds double, ptr %5, i64 %8
  %10 = load ptr, ptr %2, align 8, !tbaa !5
  %11 = getelementptr inbounds ptr, ptr %10, i64 %.011.epil
  store ptr %9, ptr %11, align 8, !tbaa !5
  %12 = add nuw i64 %.011.epil, 1
  %epil.iter.next = add i64 %epil.iter, 1
  %epil.iter.cmp.not = icmp eq i64 %epil.iter.next, %xtraiter
  br i1 %epil.iter.cmp.not, label %._crit_edge, label %.lr.ph.epil, !llvm.loop !9

._crit_edge:                                      ; preds = %._crit_edge.loopexit.unr-lcssa, %.lr.ph.epil, %3
  ret i32 0

.lr.ph:                                           ; preds = %.lr.ph, %.lr.ph.preheader.new
  %.011 = phi i64 [ 0, %.lr.ph.preheader.new ], [ %32, %.lr.ph ]
  %niter = phi i64 [ 0, %.lr.ph.preheader.new ], [ %niter.next.3, %.lr.ph ]
  %13 = mul i64 %.011, %0
  %14 = getelementptr inbounds double, ptr %5, i64 %13
  %15 = load ptr, ptr %2, align 8, !tbaa !5
  %16 = getelementptr inbounds ptr, ptr %15, i64 %.011
  store ptr %14, ptr %16, align 8, !tbaa !5
  %17 = or disjoint i64 %.011, 1
  %18 = mul i64 %17, %0
  %19 = getelementptr inbounds double, ptr %5, i64 %18
  %20 = load ptr, ptr %2, align 8, !tbaa !5
  %21 = getelementptr inbounds ptr, ptr %20, i64 %17
  store ptr %19, ptr %21, align 8, !tbaa !5
  %22 = or disjoint i64 %.011, 2
  %23 = mul i64 %22, %0
  %24 = getelementptr inbounds double, ptr %5, i64 %23
  %25 = load ptr, ptr %2, align 8, !tbaa !5
  %26 = getelementptr inbounds ptr, ptr %25, i64 %22
  store ptr %24, ptr %26, align 8, !tbaa !5
  %27 = or disjoint i64 %.011, 3
  %28 = mul i64 %27, %0
  %29 = getelementptr inbounds double, ptr %5, i64 %28
  %30 = load ptr, ptr %2, align 8, !tbaa !5
  %31 = getelementptr inbounds ptr, ptr %30, i64 %27
  store ptr %29, ptr %31, align 8, !tbaa !5
  %32 = add nuw i64 %.011, 4
  %niter.next.3 = add i64 %niter, 4
  %niter.ncmp.3 = icmp eq i64 %niter.next.3, %unroll_iter
  br i1 %niter.ncmp.3, label %._crit_edge.loopexit.unr-lcssa, label %.lr.ph, !llvm.loop !11
}

declare ptr @memory_alloc(i64 noundef, 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 = { "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 }

!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.unroll.disable"}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: CorrelatedValuePropagationPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass