; LLVM IR from nde-jesu/Doom_Nukem :: libft/srcs/string (ft_strrev)

; 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_strrev(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
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #2
  call void @llvm.lifetime.start.p0(i64 1, ptr %5) #2
  store i32 -1, ptr %3, align 4, !tbaa !9
  store i32 0, ptr %4, align 4, !tbaa !9
  br label %6

6:                                                ; preds = %13, %1
  %7 = load ptr, ptr %2, align 8, !tbaa !5
  %8 = load i32, ptr %4, align 4, !tbaa !9
  %9 = sext i32 %8 to i64
  %10 = getelementptr inbounds i8, ptr %7, i64 %9
  %11 = load i8, ptr %10, align 1, !tbaa !11
  %12 = icmp ne i8 %11, 0
  br i1 %12, label %13, label %16

13:                                               ; preds = %6
  %14 = load i32, ptr %4, align 4, !tbaa !9
  %15 = add nsw i32 %14, 1
  store i32 %15, ptr %4, align 4, !tbaa !9
  br label %6, !llvm.loop !12

16:                                               ; preds = %6
  %17 = load i32, ptr %4, align 4, !tbaa !9
  %18 = add nsw i32 %17, -1
  store i32 %18, ptr %4, align 4, !tbaa !9
  br label %19

19:                                               ; preds = %24, %16
  %20 = load i32, ptr %3, align 4, !tbaa !9
  %21 = add nsw i32 %20, 1
  store i32 %21, ptr %3, align 4, !tbaa !9
  %22 = load i32, ptr %4, align 4, !tbaa !9
  %23 = icmp slt i32 %21, %22
  br i1 %23, label %24, label %45

24:                                               ; preds = %19
  %25 = load ptr, ptr %2, align 8, !tbaa !5
  %26 = load i32, ptr %3, align 4, !tbaa !9
  %27 = sext i32 %26 to i64
  %28 = getelementptr inbounds i8, ptr %25, i64 %27
  %29 = load i8, ptr %28, align 1, !tbaa !11
  store i8 %29, ptr %5, align 1, !tbaa !11
  %30 = load ptr, ptr %2, align 8, !tbaa !5
  %31 = load i32, ptr %4, align 4, !tbaa !9
  %32 = sext i32 %31 to i64
  %33 = getelementptr inbounds i8, ptr %30, i64 %32
  %34 = load i8, ptr %33, align 1, !tbaa !11
  %35 = load ptr, ptr %2, align 8, !tbaa !5
  %36 = load i32, ptr %3, align 4, !tbaa !9
  %37 = sext i32 %36 to i64
  %38 = getelementptr inbounds i8, ptr %35, i64 %37
  store i8 %34, ptr %38, align 1, !tbaa !11
  %39 = load i8, ptr %5, align 1, !tbaa !11
  %40 = load ptr, ptr %2, align 8, !tbaa !5
  %41 = load i32, ptr %4, align 4, !tbaa !9
  %42 = add nsw i32 %41, -1
  store i32 %42, ptr %4, align 4, !tbaa !9
  %43 = sext i32 %41 to i64
  %44 = getelementptr inbounds i8, ptr %40, i64 %43
  store i8 %39, ptr %44, align 1, !tbaa !11
  br label %19, !llvm.loop !14

45:                                               ; preds = %19
  %46 = load ptr, ptr %2, align 8, !tbaa !5
  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 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 = !{!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: readwrite) uwtable
define dso_local noundef ptr @ft_strrev(ptr noundef returned %0) local_unnamed_addr #0 {
  br label %2

2:                                                ; preds = %2, %1
  %indvars.iv22 = phi i64 [ %indvars.iv.next23, %2 ], [ -1, %1 ]
  %indvars.iv = phi i64 [ %indvars.iv.next, %2 ], [ 0, %1 ]
  %3 = getelementptr inbounds i8, ptr %0, i64 %indvars.iv
  %4 = load i8, ptr %3, align 1, !tbaa !5
  %.not = icmp eq i8 %4, 0
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %indvars.iv.next23 = add nsw i64 %indvars.iv22, 1
  br i1 %.not, label %.preheader, label %2, !llvm.loop !8

.preheader:                                       ; preds = %2
  %5 = icmp ugt i64 %indvars.iv, 1
  br i1 %5, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %.preheader, %.lr.ph
  %indvars.iv24 = phi i64 [ %indvars.iv.next25, %.lr.ph ], [ %indvars.iv22, %.preheader ]
  %indvars.iv20 = phi i64 [ %indvars.iv.next21, %.lr.ph ], [ 0, %.preheader ]
  %6 = getelementptr inbounds i8, ptr %0, i64 %indvars.iv20
  %7 = load i8, ptr %6, align 1, !tbaa !5
  %8 = getelementptr inbounds i8, ptr %0, i64 %indvars.iv24
  %9 = load i8, ptr %8, align 1, !tbaa !5
  store i8 %9, ptr %6, align 1, !tbaa !5
  store i8 %7, ptr %8, align 1, !tbaa !5
  %indvars.iv.next25 = add nsw i64 %indvars.iv24, -1
  %indvars.iv.next21 = add nuw nsw i64 %indvars.iv20, 1
  %10 = icmp slt i64 %indvars.iv.next21, %indvars.iv.next25
  br i1 %10, label %.lr.ph, label %._crit_edge, !llvm.loop !10

._crit_edge:                                      ; preds = %.lr.ph, %.preheader
  ret ptr %0
}

attributes #0 = { nofree norecurse nosync nounwind memory(argmem: readwrite) 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,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass