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

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

9:                                                ; preds = %16, %2
  %10 = load ptr, ptr %4, align 8, !tbaa !5
  %11 = load i64, ptr %6, align 8, !tbaa !9
  %12 = getelementptr inbounds i8, ptr %10, i64 %11
  %13 = load i8, ptr %12, align 1, !tbaa !11
  %14 = sext i8 %13 to i32
  %15 = icmp ne i32 %14, 0
  br i1 %15, label %16, label %28

16:                                               ; preds = %9
  %17 = load ptr, ptr %4, align 8, !tbaa !5
  %18 = load i64, ptr %6, align 8, !tbaa !9
  %19 = getelementptr inbounds i8, ptr %17, i64 %18
  %20 = load i8, ptr %19, align 1, !tbaa !11
  %21 = load ptr, ptr %3, align 8, !tbaa !5
  %22 = load i64, ptr %5, align 8, !tbaa !9
  %23 = load i64, ptr %6, align 8, !tbaa !9
  %24 = add i64 %22, %23
  %25 = getelementptr inbounds i8, ptr %21, i64 %24
  store i8 %20, ptr %25, align 1, !tbaa !11
  %26 = load i64, ptr %6, align 8, !tbaa !9
  %27 = add i64 %26, 1
  store i64 %27, ptr %6, align 8, !tbaa !9
  br label %9, !llvm.loop !12

28:                                               ; preds = %9
  %29 = load ptr, ptr %3, align 8, !tbaa !5
  %30 = load i64, ptr %5, align 8, !tbaa !9
  %31 = load i64, ptr %6, align 8, !tbaa !9
  %32 = add i64 %30, %31
  %33 = getelementptr inbounds i8, ptr %29, i64 %32
  store i8 0, ptr %33, align 1, !tbaa !11
  %34 = load ptr, ptr %3, align 8, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #3
  ret ptr %34
}

; 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 = !{!"long", !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 noundef ptr @ft_strcat(ptr noundef returned %0, ptr nocapture noundef readonly %1) local_unnamed_addr #0 {
  %3 = tail call i64 @ft_strlen(ptr noundef %0) #2
  %4 = load i8, ptr %1, align 1, !tbaa !5
  %.not12 = icmp eq i8 %4, 0
  br i1 %.not12, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %2
  %5 = getelementptr i8, ptr %0, i64 %3
  br label %6

6:                                                ; preds = %.lr.ph, %6
  %7 = phi i8 [ %4, %.lr.ph ], [ %11, %6 ]
  %.013 = phi i64 [ 0, %.lr.ph ], [ %9, %6 ]
  %8 = getelementptr i8, ptr %5, i64 %.013
  store i8 %7, ptr %8, align 1, !tbaa !5
  %9 = add i64 %.013, 1
  %10 = getelementptr inbounds i8, ptr %1, i64 %9
  %11 = load i8, ptr %10, align 1, !tbaa !5
  %.not = icmp eq i8 %11, 0
  br i1 %.not, label %._crit_edge, label %6, !llvm.loop !8

._crit_edge:                                      ; preds = %6, %2
  %.0.lcssa = phi i64 [ 0, %2 ], [ %9, %6 ]
  %12 = getelementptr i8, ptr %0, i64 %3
  %13 = getelementptr i8, ptr %12, i64 %.0.lcssa
  store i8 0, ptr %13, align 1, !tbaa !5
  ret ptr %0
}

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 = !{!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,JumpThreadingPass,LCSSAPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass