; LLVM IR from ritikbanger/Hacktoberfest2022-DSA :: 07. Matrix (Searching in 2D Arraay)

; 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 [6 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 ptr, align 8
  %6 = alloca i64, align 8
  %7 = alloca i64, align 8
  %8 = alloca i32, align 4
  %9 = alloca i32, align 4
  %10 = alloca i32, align 4
  %11 = alloca i32, align 4
  %12 = 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
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #5
  %13 = 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)
  %14 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) %13, ptr noundef nonnull align 4 dereferenceable(4) %3)
  %15 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) %14, ptr noundef nonnull align 4 dereferenceable(4) %4)
  %16 = load i32, ptr %2, align 4, !tbaa !5
  %17 = zext i32 %16 to i64
  %18 = load i32, ptr %3, align 4, !tbaa !5
  %19 = zext i32 %18 to i64
  %20 = call ptr @llvm.stacksave.p0()
  store ptr %20, ptr %5, align 8
  %21 = mul nuw i64 %17, %19
  %22 = alloca i32, i64 %21, align 16
  store i64 %17, ptr %6, align 8
  store i64 %19, ptr %7, align 8
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #5
  store i32 0, ptr %8, align 4, !tbaa !5
  br label %23

23:                                               ; preds = %47, %0
  %24 = load i32, ptr %8, align 4, !tbaa !5
  %25 = load i32, ptr %2, align 4, !tbaa !5
  %26 = icmp slt i32 %24, %25
  br i1 %26, label %28, label %27

27:                                               ; preds = %23
  store i32 2, ptr %9, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #5
  br label %50

28:                                               ; preds = %23
  call void @llvm.lifetime.start.p0(i64 4, ptr %10) #5
  store i32 0, ptr %10, align 4, !tbaa !5
  br label %29

29:                                               ; preds = %43, %28
  %30 = load i32, ptr %10, align 4, !tbaa !5
  %31 = load i32, ptr %3, align 4, !tbaa !5
  %32 = icmp slt i32 %30, %31
  br i1 %32, label %34, label %33

33:                                               ; preds = %29
  store i32 5, ptr %9, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %10) #5
  br label %46

34:                                               ; preds = %29
  %35 = load i32, ptr %8, align 4, !tbaa !5
  %36 = sext i32 %35 to i64
  %37 = mul nsw i64 %36, %19
  %38 = getelementptr inbounds i32, ptr %22, i64 %37
  %39 = load i32, ptr %10, align 4, !tbaa !5
  %40 = sext i32 %39 to i64
  %41 = getelementptr inbounds i32, ptr %38, i64 %40
  %42 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) @_ZSt3cin, ptr noundef nonnull align 4 dereferenceable(4) %41)
  br label %43

43:                                               ; preds = %34
  %44 = load i32, ptr %10, align 4, !tbaa !5
  %45 = add nsw i32 %44, 1
  store i32 %45, ptr %10, align 4, !tbaa !5
  br label %29, !llvm.loop !9

46:                                               ; preds = %33
  br label %47

47:                                               ; preds = %46
  %48 = load i32, ptr %8, align 4, !tbaa !5
  %49 = add nsw i32 %48, 1
  store i32 %49, ptr %8, align 4, !tbaa !5
  br label %23, !llvm.loop !11

50:                                               ; preds = %27
  call void @llvm.lifetime.start.p0(i64 4, ptr %11) #5
  store i32 0, ptr %11, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %12) #5
  %51 = load i32, ptr %3, align 4, !tbaa !5
  %52 = sub nsw i32 %51, 1
  store i32 %52, ptr %12, align 4, !tbaa !5
  br label %53

53:                                               ; preds = %93, %50
  %54 = load i32, ptr %11, align 4, !tbaa !5
  %55 = load i32, ptr %2, align 4, !tbaa !5
  %56 = icmp slt i32 %54, %55
  br i1 %56, label %57, label %60

57:                                               ; preds = %53
  %58 = load i32, ptr %12, align 4, !tbaa !5
  %59 = icmp sge i32 %58, 0
  br label %60

60:                                               ; preds = %57, %53
  %61 = phi i1 [ false, %53 ], [ %59, %57 ]
  br i1 %61, label %62, label %94

62:                                               ; preds = %60
  %63 = load i32, ptr %11, align 4, !tbaa !5
  %64 = sext i32 %63 to i64
  %65 = mul nsw i64 %64, %19
  %66 = getelementptr inbounds i32, ptr %22, i64 %65
  %67 = load i32, ptr %12, align 4, !tbaa !5
  %68 = sext i32 %67 to i64
  %69 = getelementptr inbounds i32, ptr %66, i64 %68
  %70 = load i32, ptr %69, align 4, !tbaa !5
  %71 = load i32, ptr %4, align 4, !tbaa !5
  %72 = icmp eq i32 %70, %71
  br i1 %72, label %73, label %75

73:                                               ; preds = %62
  %74 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, ptr noundef @.str)
  br label %93

75:                                               ; preds = %62
  %76 = load i32, ptr %11, align 4, !tbaa !5
  %77 = sext i32 %76 to i64
  %78 = mul nsw i64 %77, %19
  %79 = getelementptr inbounds i32, ptr %22, i64 %78
  %80 = load i32, ptr %12, align 4, !tbaa !5
  %81 = sext i32 %80 to i64
  %82 = getelementptr inbounds i32, ptr %79, i64 %81
  %83 = load i32, ptr %82, align 4, !tbaa !5
  %84 = load i32, ptr %4, align 4, !tbaa !5
  %85 = icmp sgt i32 %83, %84
  br i1 %85, label %86, label %89

86:                                               ; preds = %75
  %87 = load i32, ptr %12, align 4, !tbaa !5
  %88 = add nsw i32 %87, -1
  store i32 %88, ptr %12, align 4, !tbaa !5
  br label %92

89:                                               ; preds = %75
  %90 = load i32, ptr %11, align 4, !tbaa !5
  %91 = add nsw i32 %90, 1
  store i32 %91, ptr %11, align 4, !tbaa !5
  br label %92

92:                                               ; preds = %89, %86
  br label %93

93:                                               ; preds = %92, %73
  br label %53, !llvm.loop !12

94:                                               ; preds = %60
  store i32 0, ptr %1, align 4
  store i32 1, ptr %9, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %12) #5
  call void @llvm.lifetime.end.p0(i64 4, ptr %11) #5
  %95 = load ptr, ptr %5, align 8
  call void @llvm.stackrestore.p0(ptr %95)
  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
  %96 = load i32, ptr %1, align 4
  ret i32 %96
}

; 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 willreturn
declare ptr @llvm.stacksave.p0() #3

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

; 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) #4

; Function Attrs: nocallback nofree nosync nounwind willreturn
declare void @llvm.stackrestore.p0(ptr) #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 willreturn }
attributes #4 = { 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 #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}
!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 [6 x i8], align 1

; Function Attrs: mustprogress norecurse uwtable
define dso_local noundef i32 @main() local_unnamed_addr #0 {
  %1 = alloca i32, align 4
  %2 = alloca i32, align 4
  %3 = alloca i32, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %1) #5
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %2) #5
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %3) #5
  %4 = 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)
  %5 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) %4, ptr noundef nonnull align 4 dereferenceable(4) %2)
  %6 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) %5, ptr noundef nonnull align 4 dereferenceable(4) %3)
  %7 = load i32, ptr %1, align 4, !tbaa !5
  %8 = zext i32 %7 to i64
  %9 = load i32, ptr %2, align 4, !tbaa !5
  %10 = zext i32 %9 to i64
  %11 = call ptr @llvm.stacksave.p0()
  %12 = mul nuw i64 %10, %8
  %13 = alloca i32, i64 %12, align 16
  %14 = load i32, ptr %1, align 4, !tbaa !5
  %15 = icmp sgt i32 %14, 0
  %.pre34 = load i32, ptr %2, align 4, !tbaa !5
  %16 = icmp sgt i32 %.pre34, 0
  %or.cond = select i1 %15, i1 %16, i1 false
  br i1 %or.cond, label %.preheader, label %._crit_edge28

.preheader:                                       ; preds = %0, %._crit_edge
  %17 = phi i32 [ %26, %._crit_edge ], [ %14, %0 ]
  %18 = phi i32 [ %27, %._crit_edge ], [ %.pre34, %0 ]
  %indvars.iv31 = phi i64 [ %indvars.iv.next32, %._crit_edge ], [ 0, %0 ]
  %19 = icmp sgt i32 %18, 0
  br i1 %19, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %.preheader
  %20 = mul nuw nsw i64 %indvars.iv31, %10
  %21 = getelementptr inbounds i32, ptr %13, i64 %20
  br label %30

._crit_edge23:                                    ; preds = %._crit_edge
  %22 = icmp sgt i32 %26, 0
  %23 = icmp sgt i32 %27, 0
  %24 = and i1 %22, %23
  br i1 %24, label %.lr.ph27.preheader, label %._crit_edge28

.lr.ph27.preheader:                               ; preds = %._crit_edge23
  %25 = add nsw i32 %27, -1
  br label %.lr.ph27

._crit_edge.loopexit:                             ; preds = %30
  %.pre = load i32, ptr %1, align 4, !tbaa !5
  br label %._crit_edge

._crit_edge:                                      ; preds = %._crit_edge.loopexit, %.preheader
  %26 = phi i32 [ %.pre, %._crit_edge.loopexit ], [ %17, %.preheader ]
  %27 = phi i32 [ %33, %._crit_edge.loopexit ], [ %18, %.preheader ]
  %indvars.iv.next32 = add nuw nsw i64 %indvars.iv31, 1
  %28 = sext i32 %26 to i64
  %29 = icmp slt i64 %indvars.iv.next32, %28
  br i1 %29, label %.preheader, label %._crit_edge23, !llvm.loop !9

30:                                               ; preds = %.lr.ph, %30
  %indvars.iv = phi i64 [ 0, %.lr.ph ], [ %indvars.iv.next, %30 ]
  %31 = getelementptr inbounds i32, ptr %21, i64 %indvars.iv
  %32 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) @_ZSt3cin, ptr noundef nonnull align 4 dereferenceable(4) %31)
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %33 = load i32, ptr %2, align 4, !tbaa !5
  %34 = sext i32 %33 to i64
  %35 = icmp slt i64 %indvars.iv.next, %34
  br i1 %35, label %30, label %._crit_edge.loopexit, !llvm.loop !12

.lr.ph27:                                         ; preds = %.lr.ph27.preheader, %53
  %36 = phi i32 [ %54, %53 ], [ %26, %.lr.ph27.preheader ]
  %.025 = phi i32 [ %.1, %53 ], [ %25, %.lr.ph27.preheader ]
  %.01524 = phi i32 [ %.116, %53 ], [ 0, %.lr.ph27.preheader ]
  %37 = sext i32 %.01524 to i64
  %38 = mul nsw i64 %37, %10
  %39 = getelementptr inbounds i32, ptr %13, i64 %38
  %40 = zext nneg i32 %.025 to i64
  %41 = getelementptr inbounds i32, ptr %39, i64 %40
  %42 = load i32, ptr %41, align 4, !tbaa !5
  %43 = load i32, ptr %3, align 4, !tbaa !5
  %44 = icmp eq i32 %42, %43
  br i1 %44, label %45, label %47

45:                                               ; preds = %.lr.ph27
  %46 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, ptr noundef nonnull @.str)
  %.pre35 = load i32, ptr %1, align 4, !tbaa !5
  br label %53

47:                                               ; preds = %.lr.ph27
  %48 = icmp sgt i32 %42, %43
  br i1 %48, label %49, label %51

49:                                               ; preds = %47
  %50 = add nsw i32 %.025, -1
  br label %53

51:                                               ; preds = %47
  %52 = add nsw i32 %.01524, 1
  br label %53

53:                                               ; preds = %49, %51, %45
  %54 = phi i32 [ %.pre35, %45 ], [ %36, %49 ], [ %36, %51 ]
  %.116 = phi i32 [ %.01524, %45 ], [ %.01524, %49 ], [ %52, %51 ]
  %.1 = phi i32 [ %.025, %45 ], [ %50, %49 ], [ %.025, %51 ]
  %55 = icmp slt i32 %.116, %54
  %56 = icmp sgt i32 %.1, -1
  %57 = select i1 %55, i1 %56, i1 false
  br i1 %57, label %.lr.ph27, label %._crit_edge28, !llvm.loop !13

._crit_edge28:                                    ; preds = %53, %0, %._crit_edge23
  call void @llvm.stackrestore.p0(ptr %11)
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %3) #5
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %2) #5
  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: mustprogress nocallback nofree nosync nounwind willreturn
declare ptr @llvm.stacksave.p0() #3

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

; 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 #4

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn
declare void @llvm.stackrestore.p0(ptr) #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 = { 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 = { mustprogress nocallback nofree nosync nounwind willreturn }
attributes #4 = { 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 #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}
!10 = !{!"llvm.loop.mustprogress"}
!11 = !{!"llvm.loop.unswitch.partial.disable"}
!12 = distinct !{!12, !10}
!13 = distinct !{!13, !10}


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