; LLVM IR from CodersForLife/Data-Structures-Algorithms :: String Matching/KMP.ll/Z8make_lpsPiRNSt7 (cxx1112basic_stringIcSt11char_traitsIcESaIcEEE)

; 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: mustprogress uwtable
define dso_local void @_Z8make_lpsPiRNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE(ptr noundef %0, ptr noundef nonnull align 8 dereferenceable(32) %1) #0 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  store ptr %1, ptr %4, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #3
  store i32 0, ptr %5, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #3
  store i32 1, ptr %6, align 4, !tbaa !9
  %7 = load ptr, ptr %3, align 8, !tbaa !5
  %8 = getelementptr inbounds i32, ptr %7, i64 0
  store i32 0, ptr %8, align 4, !tbaa !9
  br label %9

9:                                                ; preds = %55, %2
  %10 = load i32, ptr %6, align 4, !tbaa !9
  %11 = sext i32 %10 to i64
  %12 = load ptr, ptr %4, align 8, !tbaa !5
  %13 = call noundef i64 @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE6lengthEv(ptr noundef nonnull align 8 dereferenceable(32) %12) #3
  %14 = icmp ult i64 %11, %13
  br i1 %14, label %15, label %56

15:                                               ; preds = %9
  %16 = load ptr, ptr %4, align 8, !tbaa !5
  %17 = load i32, ptr %6, align 4, !tbaa !9
  %18 = sext i32 %17 to i64
  %19 = call noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32) %16, i64 noundef %18)
  %20 = load i8, ptr %19, align 1, !tbaa !11
  %21 = sext i8 %20 to i32
  %22 = load ptr, ptr %4, align 8, !tbaa !5
  %23 = load i32, ptr %5, align 4, !tbaa !9
  %24 = sext i32 %23 to i64
  %25 = call noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32) %22, i64 noundef %24)
  %26 = load i8, ptr %25, align 1, !tbaa !11
  %27 = sext i8 %26 to i32
  %28 = icmp eq i32 %21, %27
  br i1 %28, label %29, label %38

29:                                               ; preds = %15
  %30 = load i32, ptr %5, align 4, !tbaa !9
  %31 = add nsw i32 %30, 1
  store i32 %31, ptr %5, align 4, !tbaa !9
  %32 = add nsw i32 %30, 1
  %33 = load ptr, ptr %3, align 8, !tbaa !5
  %34 = load i32, ptr %6, align 4, !tbaa !9
  %35 = add nsw i32 %34, 1
  store i32 %35, ptr %6, align 4, !tbaa !9
  %36 = sext i32 %34 to i64
  %37 = getelementptr inbounds i32, ptr %33, i64 %36
  store i32 %32, ptr %37, align 4, !tbaa !9
  br label %55

38:                                               ; preds = %15
  %39 = load i32, ptr %5, align 4, !tbaa !9
  %40 = icmp sgt i32 %39, 0
  br i1 %40, label %41, label %48

41:                                               ; preds = %38
  %42 = load ptr, ptr %3, align 8, !tbaa !5
  %43 = load i32, ptr %5, align 4, !tbaa !9
  %44 = sub nsw i32 %43, 1
  %45 = sext i32 %44 to i64
  %46 = getelementptr inbounds i32, ptr %42, i64 %45
  %47 = load i32, ptr %46, align 4, !tbaa !9
  store i32 %47, ptr %5, align 4, !tbaa !9
  br label %54

48:                                               ; preds = %38
  %49 = load ptr, ptr %3, align 8, !tbaa !5
  %50 = load i32, ptr %6, align 4, !tbaa !9
  %51 = add nsw i32 %50, 1
  store i32 %51, ptr %6, align 4, !tbaa !9
  %52 = sext i32 %50 to i64
  %53 = getelementptr inbounds i32, ptr %49, i64 %52
  store i32 0, ptr %53, align 4, !tbaa !9
  br label %54

54:                                               ; preds = %48, %41
  br label %55

55:                                               ; preds = %54, %29
  br label %9, !llvm.loop !12

56:                                               ; preds = %9
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #3
  ret void
}

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

; Function Attrs: mustprogress nounwind uwtable
declare noundef i64 @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE6lengthEv(ptr noundef nonnull align 8 dereferenceable(32)) #2 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) #2 align 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 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 = { 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 #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
define dso_local void @_Z8make_lpsPiRNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE(ptr nocapture noundef %0, ptr noundef nonnull align 8 dereferenceable(32) %1) local_unnamed_addr #0 {
  store i32 0, ptr %0, align 4, !tbaa !5
  %invariant.gep = getelementptr i8, ptr %0, i64 -4
  %3 = tail call noundef i64 @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE6lengthEv(ptr noundef nonnull align 8 dereferenceable(32) %1) #1
  %4 = icmp ugt i64 %3, 1
  br i1 %4, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %2, %24
  %5 = phi i64 [ %25, %24 ], [ 1, %2 ]
  %.018 = phi i32 [ %.1, %24 ], [ 1, %2 ]
  %.01417 = phi i32 [ %.115, %24 ], [ 0, %2 ]
  %6 = tail call noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32) %1, i64 noundef %5)
  %7 = load i8, ptr %6, align 1, !tbaa !9
  %8 = sext i32 %.01417 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 !9
  %11 = icmp eq i8 %7, %10
  br i1 %11, label %12, label %16

12:                                               ; preds = %.lr.ph
  %13 = add nsw i32 %.01417, 1
  %14 = add nsw i32 %.018, 1
  %15 = getelementptr inbounds i32, ptr %0, i64 %5
  store i32 %13, ptr %15, align 4, !tbaa !5
  br label %24

16:                                               ; preds = %.lr.ph
  %17 = icmp sgt i32 %.01417, 0
  br i1 %17, label %18, label %21

18:                                               ; preds = %16
  %19 = zext nneg i32 %.01417 to i64
  %gep = getelementptr i32, ptr %invariant.gep, i64 %19
  %20 = load i32, ptr %gep, align 4, !tbaa !5
  br label %24

21:                                               ; preds = %16
  %22 = add nsw i32 %.018, 1
  %23 = getelementptr inbounds i32, ptr %0, i64 %5
  store i32 0, ptr %23, align 4, !tbaa !5
  br label %24

24:                                               ; preds = %18, %21, %12
  %.115 = phi i32 [ %13, %12 ], [ %20, %18 ], [ %.01417, %21 ]
  %.1 = phi i32 [ %14, %12 ], [ %.018, %18 ], [ %22, %21 ]
  %25 = sext i32 %.1 to i64
  %26 = tail call noundef i64 @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE6lengthEv(ptr noundef nonnull align 8 dereferenceable(32) %1) #1
  %27 = icmp ugt i64 %26, %25
  br i1 %27, label %.lr.ph, label %._crit_edge, !llvm.loop !10

._crit_edge:                                      ; preds = %24, %2
  ret void
}

; 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

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


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