; LLVM IR from DimitrisJim/leetcode_solutions :: C/Algorithms (2315)

; 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 @countAsterisks(ptr noundef %0) #0 {
  %2 = alloca ptr, align 8
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca i8, align 1
  store ptr %0, ptr %2, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #2
  store i32 0, ptr %3, align 4, !tbaa !9
  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 1, ptr %5) #2
  br label %6

6:                                                ; preds = %28, %15, %1
  %7 = load ptr, ptr %2, align 8, !tbaa !5
  %8 = getelementptr inbounds i8, ptr %7, i32 1
  store ptr %8, ptr %2, align 8, !tbaa !5
  %9 = load i8, ptr %7, align 1, !tbaa !11
  store i8 %9, ptr %5, align 1, !tbaa !11
  %10 = icmp ne i8 %9, 0
  br i1 %10, label %11, label %29

11:                                               ; preds = %6
  %12 = load i8, ptr %5, align 1, !tbaa !11
  %13 = sext i8 %12 to i32
  %14 = icmp eq i32 %13, 124
  br i1 %14, label %15, label %18

15:                                               ; preds = %11
  %16 = load i32, ptr %4, align 4, !tbaa !9
  %17 = xor i32 %16, 1
  store i32 %17, ptr %4, align 4, !tbaa !9
  br label %6, !llvm.loop !12

18:                                               ; preds = %11
  %19 = load i8, ptr %5, align 1, !tbaa !11
  %20 = sext i8 %19 to i32
  %21 = icmp eq i32 %20, 42
  br i1 %21, label %22, label %28

22:                                               ; preds = %18
  %23 = load i32, ptr %4, align 4, !tbaa !9
  %24 = icmp ne i32 %23, 0
  br i1 %24, label %28, label %25

25:                                               ; preds = %22
  %26 = load i32, ptr %3, align 4, !tbaa !9
  %27 = add nsw i32 %26, 1
  store i32 %27, ptr %3, align 4, !tbaa !9
  br label %28

28:                                               ; preds = %25, %22, %18
  br label %6, !llvm.loop !12

29:                                               ; preds = %6
  %30 = load i32, ptr %3, align 4, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 1, ptr %5) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #2
  ret i32 %30
}

; 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"}


; 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 i32 @countAsterisks(ptr nocapture noundef readonly %0) local_unnamed_addr #0 {
  br label %.outer

.outer:                                           ; preds = %7, %1
  %.08.ph = phi i32 [ %spec.select, %7 ], [ 0, %1 ]
  %.07.ph = phi i32 [ %.07, %7 ], [ 0, %1 ]
  %.0.ph = phi ptr [ %3, %7 ], [ %0, %1 ]
  br label %2

2:                                                ; preds = %.outer, %5
  %.07 = phi i32 [ %6, %5 ], [ %.07.ph, %.outer ]
  %.0 = phi ptr [ %3, %5 ], [ %.0.ph, %.outer ]
  %3 = getelementptr inbounds i8, ptr %.0, i64 1
  %4 = load i8, ptr %.0, align 1, !tbaa !5
  switch i8 %4, label %7 [
    i8 0, label %11
    i8 124, label %5
  ]

5:                                                ; preds = %2
  %6 = xor i32 %.07, 1
  br label %2, !llvm.loop !8

7:                                                ; preds = %2
  %8 = icmp eq i8 %4, 42
  %9 = icmp eq i32 %.07, 0
  %or.cond.not = select i1 %8, i1 %9, i1 false
  %10 = zext i1 %or.cond.not to i32
  %spec.select = add nuw nsw i32 %.08.ph, %10
  br label %.outer, !llvm.loop !8

11:                                               ; preds = %2
  ret i32 %.08.ph
}

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"}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,LCSSAPass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass