; LLVM IR from MakeContributions/DSA :: algorithms/CPlusPlus/Maths (armstrong)

; 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"

%"class.std::basic_istream" = type { ptr, i64, %"class.std::basic_ios" }
%"class.std::basic_ios" = type { %"class.std::ios_base", ptr, i8, i8, ptr, ptr, ptr, ptr }
%"class.std::ios_base" = type { ptr, i64, i64, i32, i32, i32, ptr, %"struct.std::ios_base::_Words", [8 x %"struct.std::ios_base::_Words"], i32, ptr, %"class.std::locale" }
%"struct.std::ios_base::_Words" = type { ptr, i64 }
%"class.std::locale" = type { ptr }
%"class.std::basic_ostream" = type { ptr, %"class.std::basic_ios" }

@_ZSt3cin = external global %"class.std::basic_istream", align 8
@_ZSt4cout = external global %"class.std::basic_ostream", align 8
@.str = external hidden unnamed_addr constant [25 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [29 x i8], align 1

; Function Attrs: mustprogress norecurse uwtable
define dso_local noundef i32 @main() #0 {
  %1 = alloca i32, align 4
  %2 = alloca i32, align 4
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  %8 = alloca i32, align 4
  %9 = alloca i32, align 4
  store i32 0, ptr %1, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr %2) #4
  store i32 0, ptr %2, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #4
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #4
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #4
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #4
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #4
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #4
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #4
  store i32 0, ptr %9, align 4, !tbaa !5
  %10 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) @_ZSt3cin, ptr noundef nonnull align 4 dereferenceable(4) %4)
  %11 = load i32, ptr %4, align 4, !tbaa !5
  store i32 %11, ptr %3, align 4, !tbaa !5
  br label %12

12:                                               ; preds = %15, %0
  %13 = load i32, ptr %3, align 4, !tbaa !5
  %14 = icmp sgt i32 %13, 0
  br i1 %14, label %15, label %20

15:                                               ; preds = %12
  %16 = load i32, ptr %3, align 4, !tbaa !5
  %17 = sdiv i32 %16, 10
  store i32 %17, ptr %3, align 4, !tbaa !5
  %18 = load i32, ptr %2, align 4, !tbaa !5
  %19 = add nsw i32 %18, 1
  store i32 %19, ptr %2, align 4, !tbaa !5
  br label %12, !llvm.loop !9

20:                                               ; preds = %12
  %21 = load i32, ptr %4, align 4, !tbaa !5
  store i32 %21, ptr %5, align 4, !tbaa !5
  br label %22

22:                                               ; preds = %40, %20
  %23 = load i32, ptr %5, align 4, !tbaa !5
  %24 = icmp sgt i32 %23, 0
  br i1 %24, label %25, label %46

25:                                               ; preds = %22
  %26 = load i32, ptr %5, align 4, !tbaa !5
  %27 = srem i32 %26, 10
  store i32 %27, ptr %6, align 4, !tbaa !5
  %28 = load i32, ptr %6, align 4, !tbaa !5
  store i32 %28, ptr %7, align 4, !tbaa !5
  store i32 1, ptr %8, align 4, !tbaa !5
  br label %29

29:                                               ; preds = %37, %25
  %30 = load i32, ptr %8, align 4, !tbaa !5
  %31 = load i32, ptr %2, align 4, !tbaa !5
  %32 = icmp slt i32 %30, %31
  br i1 %32, label %33, label %40

33:                                               ; preds = %29
  %34 = load i32, ptr %6, align 4, !tbaa !5
  %35 = load i32, ptr %7, align 4, !tbaa !5
  %36 = mul nsw i32 %35, %34
  store i32 %36, ptr %7, align 4, !tbaa !5
  br label %37

37:                                               ; preds = %33
  %38 = load i32, ptr %8, align 4, !tbaa !5
  %39 = add nsw i32 %38, 1
  store i32 %39, ptr %8, align 4, !tbaa !5
  br label %29, !llvm.loop !11

40:                                               ; preds = %29
  %41 = load i32, ptr %7, align 4, !tbaa !5
  %42 = load i32, ptr %9, align 4, !tbaa !5
  %43 = add nsw i32 %42, %41
  store i32 %43, ptr %9, align 4, !tbaa !5
  %44 = load i32, ptr %5, align 4, !tbaa !5
  %45 = sdiv i32 %44, 10
  store i32 %45, ptr %5, align 4, !tbaa !5
  br label %22, !llvm.loop !12

46:                                               ; preds = %22
  %47 = load i32, ptr %9, align 4, !tbaa !5
  %48 = load i32, ptr %4, align 4, !tbaa !5
  %49 = icmp eq i32 %47, %48
  br i1 %49, label %50, label %54

50:                                               ; preds = %46
  %51 = load i32, ptr %4, align 4, !tbaa !5
  %52 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, i32 noundef %51)
  %53 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8) %52, ptr noundef @.str)
  br label %58

54:                                               ; preds = %46
  %55 = load i32, ptr %4, align 4, !tbaa !5
  %56 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, i32 noundef %55)
  %57 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8) %56, ptr noundef @.str.1)
  br label %58

58:                                               ; preds = %54, %50
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #4
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #4
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #4
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #4
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #4
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #4
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #4
  call void @llvm.lifetime.end.p0(i64 4, ptr %2) #4
  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 noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16), ptr noundef nonnull align 4 dereferenceable(4)) #2

; Function Attrs: inlinehint mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef) #3

declare noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8), i32 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 = { mustprogress norecurse 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 = { inlinehint 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 #4 = { 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"}
!11 = distinct !{!11, !10}
!12 = distinct !{!12, !10}


; 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"

%"class.std::basic_istream" = type { ptr, i64, %"class.std::basic_ios" }
%"class.std::basic_ios" = type { %"class.std::ios_base", ptr, i8, i8, ptr, ptr, ptr, ptr }
%"class.std::ios_base" = type { ptr, i64, i64, i32, i32, i32, ptr, %"struct.std::ios_base::_Words", [8 x %"struct.std::ios_base::_Words"], i32, ptr, %"class.std::locale" }
%"struct.std::ios_base::_Words" = type { ptr, i64 }
%"class.std::locale" = type { ptr }
%"class.std::basic_ostream" = type { ptr, %"class.std::basic_ios" }

@_ZSt3cin = external global %"class.std::basic_istream", align 8
@_ZSt4cout = external global %"class.std::basic_ostream", align 8
@.str = external hidden unnamed_addr constant [25 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [29 x i8], align 1

; Function Attrs: mustprogress norecurse uwtable
define dso_local noundef i32 @main() local_unnamed_addr #0 {
  %1 = alloca i32, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %1) #5
  %2 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) @_ZSt3cin, ptr noundef nonnull align 4 dereferenceable(4) %1)
  %3 = load i32, ptr %1, align 4, !tbaa !5
  %4 = icmp sgt i32 %3, 0
  br i1 %4, label %.lr.ph, label %._crit_edge30

.preheader:                                       ; preds = %.lr.ph
  br i1 %4, label %.lr.ph29, label %._crit_edge30

.lr.ph29:                                         ; preds = %.preheader
  %.not43 = icmp eq i32 %.01722, 0
  br i1 %.not43, label %.lr.ph29.split, label %.lr.ph25.us.preheader

.lr.ph25.us.preheader:                            ; preds = %.lr.ph29
  %min.iters.check = icmp ult i32 %.01722, 8
  %n.vec = and i32 %.01722, -8
  %ind.end = or disjoint i32 %n.vec, 1
  %cmp.n = icmp eq i32 %.01722, %n.vec
  br label %.lr.ph25.us

.lr.ph25.us:                                      ; preds = %.lr.ph25.us.preheader, %._crit_edge.us
  %.028.us = phi i32 [ %14, %._crit_edge.us ], [ 0, %.lr.ph25.us.preheader ]
  %.01827.us = phi i32 [ %6, %._crit_edge.us ], [ %3, %.lr.ph25.us.preheader ]
  %5 = urem i32 %.01827.us, 10
  %6 = udiv i32 %.01827.us, 10
  br i1 %min.iters.check, label %scalar.ph.preheader, label %vector.ph

vector.ph:                                        ; preds = %.lr.ph25.us
  %7 = insertelement <4 x i32> <i32 poison, i32 1, i32 1, i32 1>, i32 %5, i64 0
  %broadcast.splatinsert = insertelement <4 x i32> poison, i32 %5, i64 0
  %broadcast.splat = shufflevector <4 x i32> %broadcast.splatinsert, <4 x i32> poison, <4 x i32> zeroinitializer
  br label %vector.body

vector.body:                                      ; preds = %vector.body, %vector.ph
  %index = phi i32 [ 0, %vector.ph ], [ %index.next, %vector.body ]
  %vec.phi = phi <4 x i32> [ %7, %vector.ph ], [ %8, %vector.body ]
  %vec.phi47 = phi <4 x i32> [ <i32 1, i32 1, i32 1, i32 1>, %vector.ph ], [ %9, %vector.body ]
  %8 = mul <4 x i32> %vec.phi, %broadcast.splat
  %9 = mul <4 x i32> %vec.phi47, %broadcast.splat
  %index.next = add nuw i32 %index, 8
  %10 = icmp eq i32 %index.next, %n.vec
  br i1 %10, label %middle.block, label %vector.body, !llvm.loop !9

middle.block:                                     ; preds = %vector.body
  %bin.rdx = mul <4 x i32> %9, %8
  %11 = call i32 @llvm.vector.reduce.mul.v4i32(<4 x i32> %bin.rdx)
  br i1 %cmp.n, label %._crit_edge.us, label %scalar.ph.preheader

scalar.ph.preheader:                              ; preds = %middle.block, %.lr.ph25.us
  %.01524.us.ph = phi i32 [ 1, %.lr.ph25.us ], [ %ind.end, %middle.block ]
  %.01623.us.ph = phi i32 [ %5, %.lr.ph25.us ], [ %11, %middle.block ]
  br label %scalar.ph

scalar.ph:                                        ; preds = %scalar.ph.preheader, %scalar.ph
  %.01524.us = phi i32 [ %13, %scalar.ph ], [ %.01524.us.ph, %scalar.ph.preheader ]
  %.01623.us = phi i32 [ %12, %scalar.ph ], [ %.01623.us.ph, %scalar.ph.preheader ]
  %12 = mul nuw nsw i32 %.01623.us, %5
  %13 = add nuw nsw i32 %.01524.us, 1
  %exitcond.not = icmp eq i32 %.01524.us, %.01722
  br i1 %exitcond.not, label %._crit_edge.us, label %scalar.ph, !llvm.loop !13

._crit_edge.us:                                   ; preds = %scalar.ph, %middle.block
  %.lcssa45 = phi i32 [ %11, %middle.block ], [ %12, %scalar.ph ]
  %14 = add nuw nsw i32 %.lcssa45, %.028.us
  %.not33 = icmp ult i32 %.01827.us, 10
  br i1 %.not33, label %._crit_edge30, label %.lr.ph25.us, !llvm.loop !14

.lr.ph:                                           ; preds = %0, %.lr.ph
  %.01722 = phi i32 [ %16, %.lr.ph ], [ 0, %0 ]
  %.01921 = phi i32 [ %15, %.lr.ph ], [ %3, %0 ]
  %15 = udiv i32 %.01921, 10
  %16 = add nuw i32 %.01722, 1
  %.not = icmp ult i32 %.01921, 10
  br i1 %.not, label %.preheader, label %.lr.ph, !llvm.loop !15

.lr.ph29.split:                                   ; preds = %.lr.ph29, %.lr.ph29.split
  %.028 = phi i32 [ %18, %.lr.ph29.split ], [ 0, %.lr.ph29 ]
  %.01827 = phi i32 [ %19, %.lr.ph29.split ], [ %3, %.lr.ph29 ]
  %17 = urem i32 %.01827, 10
  %18 = add nuw nsw i32 %17, %.028
  %19 = udiv i32 %.01827, 10
  %.not32 = icmp ult i32 %.01827, 10
  br i1 %.not32, label %._crit_edge30, label %.lr.ph29.split, !llvm.loop !14

._crit_edge30:                                    ; preds = %._crit_edge.us, %.lr.ph29.split, %0, %.preheader
  %.0.lcssa = phi i32 [ 0, %.preheader ], [ 0, %0 ], [ %18, %.lr.ph29.split ], [ %14, %._crit_edge.us ]
  %20 = icmp eq i32 %.0.lcssa, %3
  %21 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, i32 noundef %3)
  %.str..str.1 = select i1 %20, ptr @.str, ptr @.str.1
  %22 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8) %21, ptr noundef nonnull %.str..str.1)
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %1) #5
  ret i32 0
}

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

declare noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16), ptr noundef nonnull align 4 dereferenceable(4)) local_unnamed_addr #2

; Function Attrs: inlinehint mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef) local_unnamed_addr #3

declare noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8), i32 noundef) local_unnamed_addr #2

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

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i32 @llvm.vector.reduce.mul.v4i32(<4 x i32>) #4

attributes #0 = { mustprogress norecurse 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 = { "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 = { inlinehint 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 #4 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }
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 = distinct !{!9, !10, !11, !12}
!10 = !{!"llvm.loop.mustprogress"}
!11 = !{!"llvm.loop.isvectorized", i32 1}
!12 = !{!"llvm.loop.unroll.runtime.disable"}
!13 = distinct !{!13, !10, !12, !11}
!14 = distinct !{!14, !10}
!15 = distinct !{!15, !10}


; Effective O3 passes: CorrelatedValuePropagationPass,DivRemPairsPass,EarlyCSEPass,GVNPass,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LICMPass,LoopInstSimplifyPass,LoopLoadEliminationPass,LoopRotatePass,LoopSimplifyCFGPass,LoopSimplifyPass,LoopUnrollPass,LoopVectorizePass,ReassociatePass,SROAPass,SimplifyCFGPass