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

; 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_strchr(ptr noundef %0, i32 noundef %1) #0 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca i32, align 4
  %6 = alloca i64, align 8
  %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 8, ptr %6) #2
  store i64 0, ptr %6, align 8, !tbaa !11
  br label %8

8:                                                ; preds = %27, %2
  %9 = load ptr, ptr %4, align 8, !tbaa !5
  %10 = load i64, ptr %6, align 8, !tbaa !11
  %11 = getelementptr inbounds i8, ptr %9, i64 %10
  %12 = load i8, ptr %11, align 1, !tbaa !13
  %13 = sext i8 %12 to i32
  %14 = icmp ne i32 %13, 0
  br i1 %14, label %15, label %25

15:                                               ; preds = %8
  %16 = load ptr, ptr %4, align 8, !tbaa !5
  %17 = load i64, ptr %6, align 8, !tbaa !11
  %18 = getelementptr inbounds i8, ptr %16, i64 %17
  %19 = load i8, ptr %18, align 1, !tbaa !13
  %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 ne i32 %20, %23
  br label %25

25:                                               ; preds = %15, %8
  %26 = phi i1 [ false, %8 ], [ %24, %15 ]
  br i1 %26, label %27, label %30

27:                                               ; preds = %25
  %28 = load i64, ptr %6, align 8, !tbaa !11
  %29 = add i64 %28, 1
  store i64 %29, ptr %6, align 8, !tbaa !11
  br label %8, !llvm.loop !14

30:                                               ; preds = %25
  %31 = load ptr, ptr %4, align 8, !tbaa !5
  %32 = load i64, ptr %6, align 8, !tbaa !11
  %33 = getelementptr inbounds i8, ptr %31, i64 %32
  %34 = load i8, ptr %33, align 1, !tbaa !13
  %35 = sext i8 %34 to i32
  %36 = load i32, ptr %5, align 4, !tbaa !9
  %37 = trunc i32 %36 to i8
  %38 = sext i8 %37 to i32
  %39 = icmp eq i32 %35, %38
  br i1 %39, label %40, label %44

40:                                               ; preds = %30
  %41 = load ptr, ptr %4, align 8, !tbaa !5
  %42 = load i64, ptr %6, align 8, !tbaa !11
  %43 = getelementptr inbounds i8, ptr %41, i64 %42
  store ptr %43, ptr %3, align 8
  store i32 1, ptr %7, align 4
  br label %45

44:                                               ; preds = %30
  store ptr null, ptr %3, align 8
  store i32 1, ptr %7, align 4
  br label %45

45:                                               ; preds = %44, %40
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #2
  %46 = load ptr, ptr %3, align 8
  ret ptr %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 = !{!12, !12, i64 0}
!12 = !{!"long", !7, i64 0}
!13 = !{!7, !7, i64 0}
!14 = distinct !{!14, !15}
!15 = !{!"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(argmem: read) uwtable
define dso_local ptr @ft_strchr(ptr noundef readonly %0, i32 noundef %1) local_unnamed_addr #0 {
  %3 = load i8, ptr %0, align 1, !tbaa !5
  %.not16 = icmp eq i8 %3, 0
  %.pre = shl i32 %1, 24
  %.pre22 = ashr exact i32 %.pre, 24
  br i1 %.not16, label %.critedge, label %.lr.ph

.lr.ph:                                           ; preds = %2, %6
  %4 = phi i8 [ %9, %6 ], [ %3, %2 ]
  %.017 = phi i64 [ %7, %6 ], [ 0, %2 ]
  %5 = sext i8 %4 to i32
  %.not13 = icmp eq i32 %.pre22, %5
  br i1 %.not13, label %.critedge.loopexit, label %6

6:                                                ; preds = %.lr.ph
  %7 = add i64 %.017, 1
  %8 = getelementptr inbounds i8, ptr %0, i64 %7
  %9 = load i8, ptr %8, align 1, !tbaa !5
  %.not = icmp eq i8 %9, 0
  br i1 %.not, label %.critedge.loopexit, label %.lr.ph, !llvm.loop !8

.critedge.loopexit:                               ; preds = %6, %.lr.ph
  %.0.lcssa.ph = phi i64 [ %.017, %.lr.ph ], [ %7, %6 ]
  %.lcssa.ph = phi i8 [ %4, %.lr.ph ], [ 0, %6 ]
  %10 = sext i8 %.lcssa.ph to i32
  br label %.critedge

.critedge:                                        ; preds = %2, %.critedge.loopexit
  %.0.lcssa = phi i64 [ %.0.lcssa.ph, %.critedge.loopexit ], [ 0, %2 ]
  %.lcssa = phi i32 [ %10, %.critedge.loopexit ], [ 0, %2 ]
  %11 = getelementptr inbounds i8, ptr %0, i64 %.0.lcssa
  %12 = icmp eq i32 %.pre22, %.lcssa
  %. = select i1 %12, ptr %11, ptr null
  ret ptr %.
}

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"}


; Effective O3 passes: BDCEPass,EarlyCSEPass,GVNPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,LCSSAPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass