; LLVM IR from AlgoGenesis/C :: Miscellaneous Algorithms/Suffix Atomation (Suffix)

; 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"

%struct.State = type { i32, i32, [26 x i32] }

@states = external dso_local global [2000 x %struct.State], align 16

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

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

; Function Attrs: nounwind uwtable
define dso_local i32 @substringExists(ptr noundef %0) #1 {
  %2 = alloca i32, align 4
  %3 = alloca ptr, align 8
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #2
  store i32 0, ptr %4, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #2
  store i32 0, ptr %5, align 4, !tbaa !9
  br label %8

8:                                                ; preds = %46, %1
  %9 = load ptr, ptr %3, align 8, !tbaa !5
  %10 = load i32, ptr %5, align 4, !tbaa !9
  %11 = sext i32 %10 to i64
  %12 = getelementptr inbounds i8, ptr %9, i64 %11
  %13 = load i8, ptr %12, align 1, !tbaa !11
  %14 = icmp ne i8 %13, 0
  br i1 %14, label %16, label %15

15:                                               ; preds = %8
  store i32 2, ptr %6, align 4
  br label %49

16:                                               ; preds = %8
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #2
  %17 = load ptr, ptr %3, align 8, !tbaa !5
  %18 = load i32, ptr %5, align 4, !tbaa !9
  %19 = sext i32 %18 to i64
  %20 = getelementptr inbounds i8, ptr %17, i64 %19
  %21 = load i8, ptr %20, align 1, !tbaa !11
  %22 = sext i8 %21 to i32
  %23 = sub nsw i32 %22, 97
  store i32 %23, ptr %7, align 4, !tbaa !9
  %24 = load i32, ptr %4, align 4, !tbaa !9
  %25 = sext i32 %24 to i64
  %26 = getelementptr inbounds [2000 x %struct.State], ptr @states, i64 0, i64 %25
  %27 = getelementptr inbounds %struct.State, ptr %26, i32 0, i32 2
  %28 = load i32, ptr %7, align 4, !tbaa !9
  %29 = sext i32 %28 to i64
  %30 = getelementptr inbounds [26 x i32], ptr %27, i64 0, i64 %29
  %31 = load i32, ptr %30, align 4, !tbaa !9
  %32 = icmp eq i32 %31, -1
  br i1 %32, label %33, label %34

33:                                               ; preds = %16
  store i32 0, ptr %2, align 4
  store i32 1, ptr %6, align 4
  br label %43

34:                                               ; preds = %16
  %35 = load i32, ptr %4, align 4, !tbaa !9
  %36 = sext i32 %35 to i64
  %37 = getelementptr inbounds [2000 x %struct.State], ptr @states, i64 0, i64 %36
  %38 = getelementptr inbounds %struct.State, ptr %37, i32 0, i32 2
  %39 = load i32, ptr %7, align 4, !tbaa !9
  %40 = sext i32 %39 to i64
  %41 = getelementptr inbounds [26 x i32], ptr %38, i64 0, i64 %40
  %42 = load i32, ptr %41, align 4, !tbaa !9
  store i32 %42, ptr %4, align 4, !tbaa !9
  store i32 0, ptr %6, align 4
  br label %43

43:                                               ; preds = %34, %33
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #2
  %44 = load i32, ptr %6, align 4
  switch i32 %44, label %49 [
    i32 0, label %45
  ]

45:                                               ; preds = %43
  br label %46

46:                                               ; preds = %45
  %47 = load i32, ptr %5, align 4, !tbaa !9
  %48 = add nsw i32 %47, 1
  store i32 %48, ptr %5, align 4, !tbaa !9
  br label %8, !llvm.loop !12

49:                                               ; preds = %43, %15
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #2
  %50 = load i32, ptr %6, align 4
  switch i32 %50, label %52 [
    i32 2, label %51
  ]

51:                                               ; preds = %49
  store i32 1, ptr %2, align 4
  store i32 1, ptr %6, align 4
  br label %52

52:                                               ; preds = %51, %49
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #2
  %53 = load i32, ptr %2, align 4
  ret i32 %53
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 = { 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/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"

%struct.State = type { i32, i32, [26 x i32] }

@states = external dso_local local_unnamed_addr global [2000 x %struct.State], align 16

; Function Attrs: nofree norecurse nosync nounwind memory(read, inaccessiblemem: none) uwtable
define dso_local noundef i32 @substringExists(ptr nocapture noundef readonly %0) local_unnamed_addr #0 {
  %2 = load i8, ptr %0, align 1, !tbaa !5
  %.not20 = icmp eq i8 %2, 0
  br i1 %.not20, label %._crit_edge, label %.lr.ph

3:                                                ; preds = %.lr.ph
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %4 = getelementptr inbounds i8, ptr %0, i64 %indvars.iv.next
  %5 = load i8, ptr %4, align 1, !tbaa !5
  %.not = icmp eq i8 %5, 0
  br i1 %.not, label %._crit_edge.loopexit, label %.lr.ph, !llvm.loop !8

.lr.ph:                                           ; preds = %1, %3
  %indvars.iv = phi i64 [ %indvars.iv.next, %3 ], [ 0, %1 ]
  %6 = phi i8 [ %5, %3 ], [ %2, %1 ]
  %.01521 = phi i32 [ %11, %3 ], [ 0, %1 ]
  %7 = sext i8 %6 to i64
  %8 = add nsw i64 %7, -97
  %9 = sext i32 %.01521 to i64
  %10 = getelementptr inbounds [2000 x %struct.State], ptr @states, i64 0, i64 %9, i32 2, i64 %8
  %11 = load i32, ptr %10, align 4, !tbaa !10
  %.not19 = icmp ne i32 %11, -1
  br i1 %.not19, label %3, label %._crit_edge.loopexit

._crit_edge.loopexit:                             ; preds = %3, %.lr.ph
  %12 = zext i1 %.not19 to i32
  br label %._crit_edge

._crit_edge:                                      ; preds = %._crit_edge.loopexit, %1
  %.not.lcssa = phi i32 [ 1, %1 ], [ %12, %._crit_edge.loopexit ]
  ret i32 %.not.lcssa
}

attributes #0 = { nofree norecurse nosync nounwind memory(read, inaccessiblemem: none) 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" }

!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/C++ TBAA"}
!8 = distinct !{!8, !9}
!9 = !{!"llvm.loop.mustprogress"}
!10 = !{!11, !11, i64 0}
!11 = !{!"int", !6, i64 0}


; Effective O3 passes: CorrelatedValuePropagationPass,EarlyCSEPass,GVNPass,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass