; LLVM IR from VastoLorde95/Competitive-Programming :: Library/KMP.ll/Z5matchRNSt7 (cxx1112basic_stringIcSt11char_traitsIcESaIcEEES5_Pi)

; 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: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress nounwind uwtable
declare noundef i64 @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE6lengthEv(ptr noundef nonnull align 8 dereferenceable(32)) #1 align 2

; Function Attrs: mustprogress nounwind uwtable
declare noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32), i64 noundef) #1 align 2

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress uwtable
define dso_local noundef zeroext i1 @_Z5matchRNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEES5_Pi(ptr noundef nonnull align 8 dereferenceable(32) %0, ptr noundef nonnull align 8 dereferenceable(32) %1, ptr noundef %2) #2 {
  %4 = alloca i1, align 1
  %5 = alloca ptr, align 8
  %6 = alloca ptr, align 8
  %7 = alloca ptr, 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 ptr %0, ptr %5, align 8, !tbaa !5
  store ptr %1, ptr %6, align 8, !tbaa !5
  store ptr %2, ptr %7, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #3
  %13 = load ptr, ptr %5, align 8, !tbaa !5
  %14 = call noundef i64 @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE6lengthEv(ptr noundef nonnull align 8 dereferenceable(32) %13) #3
  %15 = trunc i64 %14 to i32
  store i32 %15, ptr %8, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #3
  %16 = load ptr, ptr %6, align 8, !tbaa !5
  %17 = call noundef i64 @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE6lengthEv(ptr noundef nonnull align 8 dereferenceable(32) %16) #3
  %18 = trunc i64 %17 to i32
  store i32 %18, ptr %9, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %10) #3
  store i32 0, ptr %10, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %11) #3
  store i32 0, ptr %11, align 4, !tbaa !9
  br label %19

19:                                               ; preds = %61, %3
  %20 = load i32, ptr %11, align 4, !tbaa !9
  %21 = load i32, ptr %9, align 4, !tbaa !9
  %22 = icmp slt i32 %20, %21
  br i1 %22, label %24, label %23

23:                                               ; preds = %19
  store i32 2, ptr %12, align 4
  br label %62

24:                                               ; preds = %19
  %25 = load ptr, ptr %6, align 8, !tbaa !5
  %26 = load i32, ptr %11, align 4, !tbaa !9
  %27 = sext i32 %26 to i64
  %28 = call noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32) %25, i64 noundef %27)
  %29 = load i8, ptr %28, align 1, !tbaa !11
  %30 = sext i8 %29 to i32
  %31 = load ptr, ptr %5, align 8, !tbaa !5
  %32 = load i32, ptr %10, align 4, !tbaa !9
  %33 = sext i32 %32 to i64
  %34 = call noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32) %31, i64 noundef %33)
  %35 = load i8, ptr %34, align 1, !tbaa !11
  %36 = sext i8 %35 to i32
  %37 = icmp eq i32 %30, %36
  br i1 %37, label %38, label %48

38:                                               ; preds = %24
  %39 = load i32, ptr %11, align 4, !tbaa !9
  %40 = add nsw i32 %39, 1
  store i32 %40, ptr %11, align 4, !tbaa !9
  %41 = load i32, ptr %10, align 4, !tbaa !9
  %42 = add nsw i32 %41, 1
  store i32 %42, ptr %10, align 4, !tbaa !9
  %43 = load i32, ptr %10, align 4, !tbaa !9
  %44 = load i32, ptr %8, align 4, !tbaa !9
  %45 = icmp eq i32 %43, %44
  br i1 %45, label %46, label %47

46:                                               ; preds = %38
  store i1 true, ptr %4, align 1
  store i32 1, ptr %12, align 4
  br label %62

47:                                               ; preds = %38
  br label %61

48:                                               ; preds = %24
  %49 = load i32, ptr %10, align 4, !tbaa !9
  %50 = icmp sgt i32 %49, 0
  br i1 %50, label %51, label %57

51:                                               ; preds = %48
  %52 = load ptr, ptr %7, align 8, !tbaa !5
  %53 = load i32, ptr %10, align 4, !tbaa !9
  %54 = sext i32 %53 to i64
  %55 = getelementptr inbounds i32, ptr %52, i64 %54
  %56 = load i32, ptr %55, align 4, !tbaa !9
  store i32 %56, ptr %10, align 4, !tbaa !9
  br label %60

57:                                               ; preds = %48
  %58 = load i32, ptr %11, align 4, !tbaa !9
  %59 = add nsw i32 %58, 1
  store i32 %59, ptr %11, align 4, !tbaa !9
  br label %60

60:                                               ; preds = %57, %51
  br label %61

61:                                               ; preds = %60, %47
  br label %19, !llvm.loop !12

62:                                               ; preds = %46, %23
  call void @llvm.lifetime.end.p0(i64 4, ptr %11) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %10) #3
  %63 = load i32, ptr %12, align 4
  switch i32 %63, label %65 [
    i32 2, label %64
  ]

64:                                               ; preds = %62
  store i1 false, ptr %4, align 1
  store i32 1, ptr %12, align 4
  br label %65

65:                                               ; preds = %64, %62
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #3
  %66 = load i1, ptr %4, align 1
  ret i1 %66
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { mustprogress 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 #2 = { 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 #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 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = !{!7, !7, i64 0}
!12 = distinct !{!12, !13}
!13 = !{!"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: mustprogress nounwind uwtable
declare noundef i64 @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE6lengthEv(ptr noundef nonnull align 8 dereferenceable(32)) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32), i64 noundef) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef zeroext i1 @_Z5matchRNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEES5_Pi(ptr noundef nonnull align 8 dereferenceable(32) %0, ptr noundef nonnull align 8 dereferenceable(32) %1, ptr nocapture noundef readonly %2) local_unnamed_addr #0 {
  %4 = tail call noundef i64 @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE6lengthEv(ptr noundef nonnull align 8 dereferenceable(32) %0) #1
  %5 = trunc i64 %4 to i32
  %6 = tail call noundef i64 @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE6lengthEv(ptr noundef nonnull align 8 dereferenceable(32) %1) #1
  %7 = trunc i64 %6 to i32
  %.not23 = icmp sgt i32 %7, 0
  br i1 %.not23, label %.lr.ph, label %.critedge

.lr.ph:                                           ; preds = %3, %26
  %.01725 = phi i32 [ %.1, %26 ], [ 0, %3 ]
  %.01824 = phi i32 [ %.119, %26 ], [ 0, %3 ]
  %8 = sext i32 %.01725 to i64
  %9 = tail call noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32) %1, i64 noundef %8)
  %10 = load i8, ptr %9, align 1, !tbaa !5
  %11 = sext i32 %.01824 to i64
  %12 = tail call noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32) %0, i64 noundef %11)
  %13 = load i8, ptr %12, align 1, !tbaa !5
  %14 = icmp eq i8 %10, %13
  br i1 %14, label %15, label %19

15:                                               ; preds = %.lr.ph
  %16 = add nsw i32 %.01725, 1
  %17 = add nsw i32 %.01824, 1
  %18 = icmp eq i32 %17, %5
  br i1 %18, label %.critedge, label %26

19:                                               ; preds = %.lr.ph
  %20 = icmp sgt i32 %.01824, 0
  br i1 %20, label %21, label %24

21:                                               ; preds = %19
  %22 = getelementptr inbounds i32, ptr %2, i64 %11
  %23 = load i32, ptr %22, align 4, !tbaa !8
  br label %26

24:                                               ; preds = %19
  %25 = add nsw i32 %.01725, 1
  br label %26

26:                                               ; preds = %21, %24, %15
  %.119 = phi i32 [ %17, %15 ], [ %23, %21 ], [ %.01824, %24 ]
  %.1 = phi i32 [ %16, %15 ], [ %.01725, %21 ], [ %25, %24 ]
  %.not = icmp slt i32 %.1, %7
  br i1 %.not, label %.lr.ph, label %.critedge, !llvm.loop !10

.critedge:                                        ; preds = %15, %26, %3
  %.not.lcssa = phi i1 [ false, %3 ], [ false, %26 ], [ true, %15 ]
  ret i1 %.not.lcssa
}

attributes #0 = { mustprogress 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 = { 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 = !{!"omnipotent char", !7, i64 0}
!7 = !{!"Simple C++ TBAA"}
!8 = !{!9, !9, i64 0}
!9 = !{!"int", !6, i64 0}
!10 = distinct !{!10, !11}
!11 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass