; LLVM IR from LlimaV10/doom-nukem_v2 :: libft (ft_strrchr)

; 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 ptr @ft_strrchr(ptr noundef %0, i32 noundef %1) #0 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store i32 %1, ptr %5, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #3
  %8 = load ptr, ptr %4, align 8, !tbaa !5
  %9 = call i64 @ft_strlen(ptr noundef %8)
  %10 = trunc i64 %9 to i32
  store i32 %10, ptr %6, align 4, !tbaa !9
  br label %11

11:                                               ; preds = %30, %2
  %12 = load i32, ptr %6, align 4, !tbaa !9
  %13 = icmp sge i32 %12, 0
  br i1 %13, label %14, label %33

14:                                               ; preds = %11
  %15 = load ptr, ptr %4, align 8, !tbaa !5
  %16 = load i32, ptr %6, align 4, !tbaa !9
  %17 = sext i32 %16 to i64
  %18 = getelementptr inbounds i8, ptr %15, i64 %17
  %19 = load i8, ptr %18, align 1, !tbaa !11
  %20 = sext i8 %19 to i32
  %21 = load i32, ptr %5, align 4, !tbaa !9
  %22 = trunc i32 %21 to i8
  %23 = sext i8 %22 to i32
  %24 = icmp eq i32 %20, %23
  br i1 %24, label %25, label %30

25:                                               ; preds = %14
  %26 = load ptr, ptr %4, align 8, !tbaa !5
  %27 = load i32, ptr %6, align 4, !tbaa !9
  %28 = sext i32 %27 to i64
  %29 = getelementptr inbounds i8, ptr %26, i64 %28
  store ptr %29, ptr %3, align 8
  store i32 1, ptr %7, align 4
  br label %34

30:                                               ; preds = %14
  %31 = load i32, ptr %6, align 4, !tbaa !9
  %32 = add nsw i32 %31, -1
  store i32 %32, ptr %6, align 4, !tbaa !9
  br label %11, !llvm.loop !12

33:                                               ; preds = %11
  store ptr null, ptr %3, align 8
  store i32 1, ptr %7, align 4
  br label %34

34:                                               ; preds = %33, %25
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #3
  %35 = load ptr, ptr %3, align 8
  ret ptr %35
}

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

declare i64 @ft_strlen(ptr noundef) #2

; 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 = { "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/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: nounwind uwtable
define dso_local ptr @ft_strrchr(ptr noundef %0, i32 noundef %1) local_unnamed_addr #0 {
  %3 = tail call i64 @ft_strlen(ptr noundef %0) #2
  %4 = trunc i64 %3 to i32
  %5 = icmp sgt i32 %4, -1
  br i1 %5, label %.lr.ph, label %.split.loop.exit

.lr.ph:                                           ; preds = %2
  %sext = shl i32 %1, 24
  %6 = ashr exact i32 %sext, 24
  br label %10

7:                                                ; preds = %10
  %8 = add nsw i32 %.011, -1
  %9 = icmp sgt i32 %.011, 0
  br i1 %9, label %10, label %.split.loop.exit, !llvm.loop !5

10:                                               ; preds = %.lr.ph, %7
  %.011 = phi i32 [ %4, %.lr.ph ], [ %8, %7 ]
  %11 = zext nneg i32 %.011 to i64
  %12 = getelementptr inbounds i8, ptr %0, i64 %11
  %13 = load i8, ptr %12, align 1, !tbaa !7
  %14 = sext i8 %13 to i32
  %15 = icmp eq i32 %6, %14
  br i1 %15, label %.split.loop.exit.loopexit.split.loop.exit, label %7

.split.loop.exit.loopexit.split.loop.exit:        ; preds = %10
  %16 = getelementptr inbounds i8, ptr %0, i64 %11
  br label %.split.loop.exit

.split.loop.exit:                                 ; preds = %7, %.split.loop.exit.loopexit.split.loop.exit, %2
  %.08 = phi ptr [ null, %2 ], [ %16, %.split.loop.exit.loopexit.split.loop.exit ], [ null, %7 ]
  ret ptr %.08
}

declare i64 @ft_strlen(ptr noundef) local_unnamed_addr #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 = { "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 = distinct !{!5, !6}
!6 = !{!"llvm.loop.mustprogress"}
!7 = !{!8, !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}


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