; LLVM IR from DimitrisJim/leetcode_solutions :: C/Algorithms (2114)

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

9:                                                ; preds = %41, %2
  %10 = load i32, ptr %6, align 4, !tbaa !9
  %11 = load i32, ptr %4, align 4, !tbaa !9
  %12 = icmp slt i32 %10, %11
  br i1 %12, label %14, label %13

13:                                               ; preds = %9
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #2
  br label %44

14:                                               ; preds = %9
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #2
  %15 = load ptr, ptr %3, align 8, !tbaa !5
  %16 = load i32, ptr %6, align 4, !tbaa !9
  %17 = sext i32 %16 to i64
  %18 = getelementptr inbounds ptr, ptr %15, i64 %17
  %19 = load ptr, ptr %18, align 8, !tbaa !5
  store ptr %19, ptr %7, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #2
  store i32 0, ptr %8, align 4, !tbaa !9
  br label %20

20:                                               ; preds = %33, %14
  %21 = load ptr, ptr %7, align 8, !tbaa !5
  %22 = load i8, ptr %21, align 1, !tbaa !11
  %23 = icmp ne i8 %22, 0
  br i1 %23, label %24, label %34

24:                                               ; preds = %20
  %25 = load ptr, ptr %7, align 8, !tbaa !5
  %26 = getelementptr inbounds i8, ptr %25, i32 1
  store ptr %26, ptr %7, align 8, !tbaa !5
  %27 = load i8, ptr %25, align 1, !tbaa !11
  %28 = sext i8 %27 to i32
  %29 = icmp eq i32 %28, 32
  br i1 %29, label %30, label %33

30:                                               ; preds = %24
  %31 = load i32, ptr %8, align 4, !tbaa !9
  %32 = add nsw i32 %31, 1
  store i32 %32, ptr %8, align 4, !tbaa !9
  br label %33

33:                                               ; preds = %30, %24
  br label %20, !llvm.loop !12

34:                                               ; preds = %20
  %35 = load i32, ptr %8, align 4, !tbaa !9
  %36 = load i32, ptr %5, align 4, !tbaa !9
  %37 = icmp sge i32 %35, %36
  br i1 %37, label %38, label %40

38:                                               ; preds = %34
  %39 = load i32, ptr %8, align 4, !tbaa !9
  store i32 %39, ptr %5, align 4, !tbaa !9
  br label %40

40:                                               ; preds = %38, %34
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #2
  br label %41

41:                                               ; preds = %40
  %42 = load i32, ptr %6, align 4, !tbaa !9
  %43 = add nsw i32 %42, 1
  store i32 %43, ptr %6, align 4, !tbaa !9
  br label %9, !llvm.loop !14

44:                                               ; preds = %13
  %45 = load i32, ptr %5, align 4, !tbaa !9
  %46 = add nsw i32 %45, 1
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #2
  ret i32 %46
}

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

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

attributes #0 = { 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 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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"}
!14 = distinct !{!14, !13}


; 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: nofree norecurse nosync nounwind memory(read, inaccessiblemem: none) uwtable
define dso_local range(i32 -2147483647, -2147483648) i32 @mostWordsFound(ptr nocapture noundef readonly %0, i32 noundef %1) local_unnamed_addr #0 {
  %3 = icmp sgt i32 %1, 0
  br i1 %3, label %.lr.ph24.preheader, label %._crit_edge25

.lr.ph24.preheader:                               ; preds = %2
  %wide.trip.count = zext nneg i32 %1 to i64
  br label %.lr.ph24

._crit_edge25.loopexit:                           ; preds = %._crit_edge
  %4 = add nuw nsw i32 %spec.select17, 1
  br label %._crit_edge25

._crit_edge25:                                    ; preds = %._crit_edge25.loopexit, %2
  %.013.lcssa = phi i32 [ 1, %2 ], [ %4, %._crit_edge25.loopexit ]
  ret i32 %.013.lcssa

.lr.ph24:                                         ; preds = %.lr.ph24.preheader, %._crit_edge
  %indvars.iv = phi i64 [ 0, %.lr.ph24.preheader ], [ %indvars.iv.next, %._crit_edge ]
  %.01321 = phi i32 [ 0, %.lr.ph24.preheader ], [ %spec.select17, %._crit_edge ]
  %5 = getelementptr inbounds ptr, ptr %0, i64 %indvars.iv
  %6 = load ptr, ptr %5, align 8, !tbaa !5
  %7 = load i8, ptr %6, align 1, !tbaa !9
  %.not18 = icmp eq i8 %7, 0
  br i1 %.not18, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %.lr.ph24, %.lr.ph
  %8 = phi i8 [ %12, %.lr.ph ], [ %7, %.lr.ph24 ]
  %.020 = phi i32 [ %spec.select, %.lr.ph ], [ 0, %.lr.ph24 ]
  %.01119 = phi ptr [ %9, %.lr.ph ], [ %6, %.lr.ph24 ]
  %9 = getelementptr inbounds i8, ptr %.01119, i64 1
  %10 = icmp eq i8 %8, 32
  %11 = zext i1 %10 to i32
  %spec.select = add nuw nsw i32 %.020, %11
  %12 = load i8, ptr %9, align 1, !tbaa !9
  %.not = icmp eq i8 %12, 0
  br i1 %.not, label %._crit_edge, label %.lr.ph, !llvm.loop !10

._crit_edge:                                      ; preds = %.lr.ph, %.lr.ph24
  %.0.lcssa = phi i32 [ 0, %.lr.ph24 ], [ %spec.select, %.lr.ph ]
  %spec.select17 = tail call i32 @llvm.smax.i32(i32 %.0.lcssa, i32 %.01321)
  %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 %._crit_edge25.loopexit, label %.lr.ph24, !llvm.loop !12
}

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i32 @llvm.smax.i32(i32, i32) #1

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" }
attributes #1 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }

!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 = !{!7, !7, i64 0}
!10 = distinct !{!10, !11}
!11 = !{!"llvm.loop.mustprogress"}
!12 = distinct !{!12, !11}


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