; LLVM IR from MinaFaried3/Assiut-University-Training---Newcomers :: e-sheet3_array (T-Matrix)

; 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

; 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 ptr, align 8
  %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) #5
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #5
  store i32 0, ptr %3, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #5
  store i32 0, ptr %4, 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) %2)
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #5
  %11 = load i32, ptr %2, align 4, !tbaa !5
  %12 = sext i32 %11 to i64
  %13 = call { i64, i1 } @llvm.umul.with.overflow.i64(i64 %12, i64 8)
  %14 = extractvalue { i64, i1 } %13, 1
  %15 = extractvalue { i64, i1 } %13, 0
  %16 = select i1 %14, i64 -1, i64 %15
  %17 = call noalias noundef nonnull ptr @_Znam(i64 noundef %16) #6
  store ptr %17, ptr %5, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #5
  store i32 0, ptr %6, align 4, !tbaa !5
  br label %18

18:                                               ; preds = %35, %0
  %19 = load i32, ptr %6, align 4, !tbaa !5
  %20 = load i32, ptr %2, align 4, !tbaa !5
  %21 = icmp slt i32 %19, %20
  br i1 %21, label %23, label %22

22:                                               ; preds = %18
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #5
  br label %38

23:                                               ; preds = %18
  %24 = load i32, ptr %2, align 4, !tbaa !5
  %25 = sext i32 %24 to i64
  %26 = call { i64, i1 } @llvm.umul.with.overflow.i64(i64 %25, i64 4)
  %27 = extractvalue { i64, i1 } %26, 1
  %28 = extractvalue { i64, i1 } %26, 0
  %29 = select i1 %27, i64 -1, i64 %28
  %30 = call noalias noundef nonnull ptr @_Znam(i64 noundef %29) #6
  %31 = load ptr, ptr %5, align 8, !tbaa !9
  %32 = load i32, ptr %6, align 4, !tbaa !5
  %33 = sext i32 %32 to i64
  %34 = getelementptr inbounds ptr, ptr %31, i64 %33
  store ptr %30, ptr %34, align 8, !tbaa !9
  br label %35

35:                                               ; preds = %23
  %36 = load i32, ptr %6, align 4, !tbaa !5
  %37 = add nsw i32 %36, 1
  store i32 %37, ptr %6, align 4, !tbaa !5
  br label %18, !llvm.loop !11

38:                                               ; preds = %22
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #5
  store i32 0, ptr %7, align 4, !tbaa !5
  br label %39

39:                                               ; preds = %99, %38
  %40 = load i32, ptr %7, align 4, !tbaa !5
  %41 = load i32, ptr %2, align 4, !tbaa !5
  %42 = icmp slt i32 %40, %41
  br i1 %42, label %44, label %43

43:                                               ; preds = %39
  store i32 5, ptr %8, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #5
  br label %102

44:                                               ; preds = %39
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #5
  store i32 0, ptr %9, align 4, !tbaa !5
  br label %45

45:                                               ; preds = %95, %44
  %46 = load i32, ptr %9, align 4, !tbaa !5
  %47 = load i32, ptr %2, align 4, !tbaa !5
  %48 = icmp slt i32 %46, %47
  br i1 %48, label %50, label %49

49:                                               ; preds = %45
  store i32 8, ptr %8, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #5
  br label %98

50:                                               ; preds = %45
  %51 = load ptr, ptr %5, align 8, !tbaa !9
  %52 = load i32, ptr %7, align 4, !tbaa !5
  %53 = sext i32 %52 to i64
  %54 = getelementptr inbounds ptr, ptr %51, i64 %53
  %55 = load ptr, ptr %54, align 8, !tbaa !9
  %56 = load i32, ptr %9, align 4, !tbaa !5
  %57 = sext i32 %56 to i64
  %58 = getelementptr inbounds i32, ptr %55, i64 %57
  %59 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) @_ZSt3cin, ptr noundef nonnull align 4 dereferenceable(4) %58)
  %60 = load i32, ptr %7, align 4, !tbaa !5
  %61 = load i32, ptr %9, align 4, !tbaa !5
  %62 = icmp eq i32 %60, %61
  br i1 %62, label %63, label %75

63:                                               ; preds = %50
  %64 = load ptr, ptr %5, align 8, !tbaa !9
  %65 = load i32, ptr %7, align 4, !tbaa !5
  %66 = sext i32 %65 to i64
  %67 = getelementptr inbounds ptr, ptr %64, i64 %66
  %68 = load ptr, ptr %67, align 8, !tbaa !9
  %69 = load i32, ptr %9, align 4, !tbaa !5
  %70 = sext i32 %69 to i64
  %71 = getelementptr inbounds i32, ptr %68, i64 %70
  %72 = load i32, ptr %71, align 4, !tbaa !5
  %73 = load i32, ptr %3, align 4, !tbaa !5
  %74 = add nsw i32 %73, %72
  store i32 %74, ptr %3, align 4, !tbaa !5
  br label %75

75:                                               ; preds = %63, %50
  %76 = load i32, ptr %9, align 4, !tbaa !5
  %77 = load i32, ptr %2, align 4, !tbaa !5
  %78 = sub nsw i32 %77, 1
  %79 = load i32, ptr %7, align 4, !tbaa !5
  %80 = sub nsw i32 %78, %79
  %81 = icmp eq i32 %76, %80
  br i1 %81, label %82, label %94

82:                                               ; preds = %75
  %83 = load ptr, ptr %5, align 8, !tbaa !9
  %84 = load i32, ptr %7, align 4, !tbaa !5
  %85 = sext i32 %84 to i64
  %86 = getelementptr inbounds ptr, ptr %83, i64 %85
  %87 = load ptr, ptr %86, align 8, !tbaa !9
  %88 = load i32, ptr %9, align 4, !tbaa !5
  %89 = sext i32 %88 to i64
  %90 = getelementptr inbounds i32, ptr %87, i64 %89
  %91 = load i32, ptr %90, align 4, !tbaa !5
  %92 = load i32, ptr %4, align 4, !tbaa !5
  %93 = add nsw i32 %92, %91
  store i32 %93, ptr %4, align 4, !tbaa !5
  br label %94

94:                                               ; preds = %82, %75
  br label %95

95:                                               ; preds = %94
  %96 = load i32, ptr %9, align 4, !tbaa !5
  %97 = add nsw i32 %96, 1
  store i32 %97, ptr %9, align 4, !tbaa !5
  br label %45, !llvm.loop !13

98:                                               ; preds = %49
  br label %99

99:                                               ; preds = %98
  %100 = load i32, ptr %7, align 4, !tbaa !5
  %101 = add nsw i32 %100, 1
  store i32 %101, ptr %7, align 4, !tbaa !5
  br label %39, !llvm.loop !14

102:                                              ; preds = %43
  %103 = load i32, ptr %3, align 4, !tbaa !5
  %104 = load i32, ptr %4, align 4, !tbaa !5
  %105 = sub nsw i32 %103, %104
  %106 = call i32 @llvm.abs.i32(i32 %105, i1 true)
  %107 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, i32 noundef %106)
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #5
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #5
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #5
  call void @llvm.lifetime.end.p0(i64 4, ptr %2) #5
  %108 = load i32, ptr %1, align 4
  ret i32 %108
}

; 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: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare { i64, i1 } @llvm.umul.with.overflow.i64(i64, i64) #3

; Function Attrs: nobuiltin allocsize(0)
declare noundef nonnull ptr @_Znam(i64 noundef) #4

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

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 speculatable willreturn memory(none)
declare i32 @llvm.abs.i32(i32, i1 immarg) #3

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 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }
attributes #4 = { 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 #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 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}
!13 = distinct !{!13, !12}
!14 = distinct !{!14, !12}


; 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

; 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 = sext i32 %3 to i64
  %5 = icmp slt i32 %3, 0
  %6 = shl nsw i64 %4, 3
  %7 = select i1 %5, i64 -1, i64 %6
  %8 = call noalias noundef nonnull ptr @_Znam(i64 noundef %7) #6
  %9 = icmp sgt i32 %3, 0
  br i1 %9, label %.lr.ph, label %._crit_edge42

.lr.ph:                                           ; preds = %0
  %10 = shl nuw nsw i64 %4, 2
  %wide.trip.count = zext nneg i32 %3 to i64
  br label %11

.preheader32:                                     ; preds = %11
  br i1 %9, label %.preheader, label %._crit_edge42

11:                                               ; preds = %.lr.ph, %11
  %indvars.iv = phi i64 [ 0, %.lr.ph ], [ %indvars.iv.next, %11 ]
  %12 = call noalias noundef nonnull ptr @_Znam(i64 noundef %10) #6
  %13 = getelementptr inbounds ptr, ptr %8, i64 %indvars.iv
  store ptr %12, ptr %13, align 8, !tbaa !9
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %exitcond.not = icmp eq i64 %indvars.iv.next, %wide.trip.count
  br i1 %exitcond.not, label %.preheader32, label %11, !llvm.loop !11

.preheader:                                       ; preds = %.preheader32, %._crit_edge
  %14 = phi i32 [ %24, %._crit_edge ], [ %3, %.preheader32 ]
  %indvars.iv51 = phi i64 [ %indvars.iv.next52, %._crit_edge ], [ 0, %.preheader32 ]
  %.02740 = phi i32 [ %.1.lcssa, %._crit_edge ], [ 0, %.preheader32 ]
  %.02839 = phi i32 [ %.129.lcssa, %._crit_edge ], [ 0, %.preheader32 ]
  %15 = icmp sgt i32 %14, 0
  br i1 %15, label %.lr.ph37, label %.preheader.._crit_edge_crit_edge

.preheader.._crit_edge_crit_edge:                 ; preds = %.preheader
  %.pre = sext i32 %14 to i64
  br label %._crit_edge

.lr.ph37:                                         ; preds = %.preheader
  %16 = getelementptr inbounds ptr, ptr %8, i64 %indvars.iv51
  %17 = load ptr, ptr %16, align 8, !tbaa !9
  %18 = trunc nuw nsw i64 %indvars.iv51 to i32
  %19 = xor i32 %18, -1
  br label %26

._crit_edge42.loopexit:                           ; preds = %._crit_edge
  %20 = sub nsw i32 %.1.lcssa, %.129.lcssa
  br label %._crit_edge42

._crit_edge42:                                    ; preds = %0, %._crit_edge42.loopexit, %.preheader32
  %21 = phi i32 [ 0, %.preheader32 ], [ %20, %._crit_edge42.loopexit ], [ 0, %0 ]
  %22 = call i32 @llvm.abs.i32(i32 %21, i1 true)
  %23 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, i32 noundef %22)
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %1) #5
  ret i32 0

._crit_edge:                                      ; preds = %41, %.preheader.._crit_edge_crit_edge
  %.pre-phi = phi i64 [ %.pre, %.preheader.._crit_edge_crit_edge ], [ %42, %41 ]
  %24 = phi i32 [ %14, %.preheader.._crit_edge_crit_edge ], [ %34, %41 ]
  %.129.lcssa = phi i32 [ %.02839, %.preheader.._crit_edge_crit_edge ], [ %.230, %41 ]
  %.1.lcssa = phi i32 [ %.02740, %.preheader.._crit_edge_crit_edge ], [ %.2, %41 ]
  %indvars.iv.next52 = add nuw nsw i64 %indvars.iv51, 1
  %25 = icmp slt i64 %indvars.iv.next52, %.pre-phi
  br i1 %25, label %.preheader, label %._crit_edge42.loopexit, !llvm.loop !13

26:                                               ; preds = %.lr.ph37, %41
  %indvars.iv48 = phi i64 [ 0, %.lr.ph37 ], [ %indvars.iv.next49, %41 ]
  %.135 = phi i32 [ %.02740, %.lr.ph37 ], [ %.2, %41 ]
  %.12934 = phi i32 [ %.02839, %.lr.ph37 ], [ %.230, %41 ]
  %27 = getelementptr inbounds i32, ptr %17, i64 %indvars.iv48
  %28 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) @_ZSt3cin, ptr noundef nonnull align 4 dereferenceable(4) %27)
  %29 = icmp eq i64 %indvars.iv51, %indvars.iv48
  br i1 %29, label %30, label %33

30:                                               ; preds = %26
  %31 = load i32, ptr %27, align 4, !tbaa !5
  %32 = add nsw i32 %31, %.135
  br label %33

33:                                               ; preds = %30, %26
  %.2 = phi i32 [ %32, %30 ], [ %.135, %26 ]
  %34 = load i32, ptr %1, align 4, !tbaa !5
  %35 = add i32 %34, %19
  %36 = zext i32 %35 to i64
  %37 = icmp eq i64 %indvars.iv48, %36
  br i1 %37, label %38, label %41

38:                                               ; preds = %33
  %39 = load i32, ptr %27, align 4, !tbaa !5
  %40 = add nsw i32 %39, %.12934
  br label %41

41:                                               ; preds = %33, %38
  %.230 = phi i32 [ %40, %38 ], [ %.12934, %33 ]
  %indvars.iv.next49 = add nuw nsw i64 %indvars.iv48, 1
  %42 = sext i32 %34 to i64
  %43 = icmp slt i64 %indvars.iv.next49, %42
  br i1 %43, label %26, label %._crit_edge, !llvm.loop !15
}

; 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: nobuiltin allocsize(0)
declare noundef nonnull ptr @_Znam(i64 noundef) local_unnamed_addr #3

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

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 speculatable willreturn memory(none)
declare i32 @llvm.abs.i32(i32, i1 immarg) #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 = { 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 #4 = { mustprogress nocallback nofree nosync nounwind speculatable willreturn memory(none) }
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 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}
!13 = distinct !{!13, !12, !14}
!14 = !{!"llvm.loop.unswitch.partial.disable"}
!15 = distinct !{!15, !12}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LICMPass,LoopInstSimplifyPass,LoopRotatePass,LoopSimplifyCFGPass,LoopSimplifyPass,LoopUnrollPass,ReassociatePass,SCCPPass,SROAPass,SimpleLoopUnswitchPass,SimplifyCFGPass