; LLVM IR from 48d31kh413k/1337-push_swap-42 :: 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) #2
  store i32 0, ptr %6, align 4, !tbaa !9
  br label %8

8:                                                ; preds = %15, %2
  %9 = load ptr, ptr %4, align 8, !tbaa !5
  %10 = load i32, ptr %6, 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 %15, label %18

15:                                               ; preds = %8
  %16 = load i32, ptr %6, align 4, !tbaa !9
  %17 = add nsw i32 %16, 1
  store i32 %17, ptr %6, align 4, !tbaa !9
  br label %8, !llvm.loop !12

18:                                               ; preds = %8
  br label %19

19:                                               ; preds = %38, %18
  %20 = load i32, ptr %6, align 4, !tbaa !9
  %21 = icmp sge i32 %20, 0
  br i1 %21, label %22, label %41

22:                                               ; preds = %19
  %23 = load ptr, ptr %4, align 8, !tbaa !5
  %24 = load i32, ptr %6, align 4, !tbaa !9
  %25 = sext i32 %24 to i64
  %26 = getelementptr inbounds i8, ptr %23, i64 %25
  %27 = load i8, ptr %26, align 1, !tbaa !11
  %28 = sext i8 %27 to i32
  %29 = load i32, ptr %5, align 4, !tbaa !9
  %30 = trunc i32 %29 to i8
  %31 = sext i8 %30 to i32
  %32 = icmp eq i32 %28, %31
  br i1 %32, label %33, label %38

33:                                               ; preds = %22
  %34 = load ptr, ptr %4, align 8, !tbaa !5
  %35 = load i32, ptr %6, align 4, !tbaa !9
  %36 = sext i32 %35 to i64
  %37 = getelementptr inbounds i8, ptr %34, i64 %36
  store ptr %37, ptr %3, align 8
  store i32 1, ptr %7, align 4
  br label %42

38:                                               ; preds = %22
  %39 = load i32, ptr %6, align 4, !tbaa !9
  %40 = add nsw i32 %39, -1
  store i32 %40, ptr %6, align 4, !tbaa !9
  br label %19, !llvm.loop !14

41:                                               ; preds = %19
  store ptr null, ptr %3, align 8
  store i32 1, ptr %7, align 4
  br label %42

42:                                               ; preds = %41, %33
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #2
  %43 = load ptr, ptr %3, align 8
  ret ptr %43
}

; 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(argmem: read) uwtable
define dso_local ptr @ft_strrchr(ptr noundef readonly %0, i32 noundef %1) local_unnamed_addr #0 {
  br label %3

3:                                                ; preds = %3, %2
  %indvars.iv = phi i64 [ %indvars.iv.next, %3 ], [ 0, %2 ]
  %4 = getelementptr inbounds i8, ptr %0, i64 %indvars.iv
  %5 = load i8, ptr %4, align 1, !tbaa !5
  %.not = icmp eq i8 %5, 0
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  br i1 %.not, label %.lr.ph, label %3, !llvm.loop !8

.lr.ph:                                           ; preds = %3
  %6 = trunc nuw nsw i64 %indvars.iv to i32
  %sext = shl i32 %1, 24
  %7 = ashr exact i32 %sext, 24
  br label %11

8:                                                ; preds = %11
  %9 = add nsw i32 %.113, -1
  %10 = icmp sgt i32 %.113, 0
  br i1 %10, label %11, label %.split.loop.exit, !llvm.loop !10

11:                                               ; preds = %.lr.ph, %8
  %.113 = phi i32 [ %6, %.lr.ph ], [ %9, %8 ]
  %12 = zext nneg i32 %.113 to i64
  %13 = getelementptr inbounds i8, ptr %0, i64 %12
  %14 = load i8, ptr %13, align 1, !tbaa !5
  %15 = sext i8 %14 to i32
  %16 = icmp eq i32 %7, %15
  br i1 %16, label %.split.loop.exit.split.loop.exit16, label %8

.split.loop.exit.split.loop.exit16:               ; preds = %11
  %17 = getelementptr inbounds i8, ptr %0, i64 %12
  br label %.split.loop.exit

.split.loop.exit:                                 ; preds = %8, %.split.loop.exit.split.loop.exit16
  %.010 = phi ptr [ %17, %.split.loop.exit.split.loop.exit16 ], [ null, %8 ]
  ret ptr %.010
}

attributes #0 = { nofree norecurse nosync nounwind memory(argmem: read) 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 = distinct !{!10, !9}


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