; LLVM IR from filipwasil/fillwave :: ext/nv_helpers_gl/nv_dds.ll (ZN6nv_dds9CDDSImage12flip_textureERNS_8CTextureE)

; 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: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZN6nv_dds9CDDSImage4flipERNS_8CSurfaceE(ptr noundef nonnull align 8 dereferenceable(104), ptr noundef nonnull align 8 dereferenceable(32)) #1 align 2

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(32) ptr @_ZN6nv_dds8CTexture10get_mipmapEj(ptr noundef nonnull align 8 dereferenceable(112), i32 noundef) #2 align 2

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef i32 @_ZNK6nv_dds8CTexture15get_num_mipmapsEv(ptr noundef nonnull align 8 dereferenceable(112)) #2 align 2

; Function Attrs: mustprogress uwtable
define dso_local void @_ZN6nv_dds9CDDSImage12flip_textureERNS_8CTextureE(ptr noundef nonnull align 8 dereferenceable(104) %0, ptr noundef nonnull align 8 dereferenceable(112) %1) #1 align 2 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  store ptr %1, ptr %4, align 8, !tbaa !5
  %6 = load ptr, ptr %3, align 8
  %7 = load ptr, ptr %4, align 8, !tbaa !5
  call void @_ZN6nv_dds9CDDSImage4flipERNS_8CSurfaceE(ptr noundef nonnull align 8 dereferenceable(104) %6, ptr noundef nonnull align 8 dereferenceable(32) %7)
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #3
  store i32 0, ptr %5, align 4, !tbaa !9
  br label %8

8:                                                ; preds = %18, %2
  %9 = load i32, ptr %5, align 4, !tbaa !9
  %10 = load ptr, ptr %4, align 8, !tbaa !5
  %11 = call noundef i32 @_ZNK6nv_dds8CTexture15get_num_mipmapsEv(ptr noundef nonnull align 8 dereferenceable(112) %10)
  %12 = icmp ult i32 %9, %11
  br i1 %12, label %14, label %13

13:                                               ; preds = %8
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #3
  br label %21

14:                                               ; preds = %8
  %15 = load ptr, ptr %4, align 8, !tbaa !5
  %16 = load i32, ptr %5, align 4, !tbaa !9
  %17 = call noundef nonnull align 8 dereferenceable(32) ptr @_ZN6nv_dds8CTexture10get_mipmapEj(ptr noundef nonnull align 8 dereferenceable(112) %15, i32 noundef %16)
  call void @_ZN6nv_dds9CDDSImage4flipERNS_8CSurfaceE(ptr noundef nonnull align 8 dereferenceable(104) %6, ptr noundef nonnull align 8 dereferenceable(32) %17)
  br label %18

18:                                               ; preds = %14
  %19 = load i32, ptr %5, align 4, !tbaa !9
  %20 = add i32 %19, 1
  store i32 %20, ptr %5, align 4, !tbaa !9
  br label %8, !llvm.loop !11

21:                                               ; preds = %13
  ret void
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { mustprogress 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 #2 = { inlinehint mustprogress 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 #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++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"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: mustprogress uwtable
declare dso_local void @_ZN6nv_dds9CDDSImage4flipERNS_8CSurfaceE(ptr noundef nonnull align 8 dereferenceable(104), ptr noundef nonnull align 8 dereferenceable(32)) local_unnamed_addr #0 align 2

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(32) ptr @_ZN6nv_dds8CTexture10get_mipmapEj(ptr noundef nonnull align 8 dereferenceable(112), i32 noundef) local_unnamed_addr #1 align 2

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef i32 @_ZNK6nv_dds8CTexture15get_num_mipmapsEv(ptr noundef nonnull align 8 dereferenceable(112)) local_unnamed_addr #1 align 2

; Function Attrs: mustprogress uwtable
define dso_local void @_ZN6nv_dds9CDDSImage12flip_textureERNS_8CTextureE(ptr noundef nonnull align 8 dereferenceable(104) %0, ptr noundef nonnull align 8 dereferenceable(112) %1) local_unnamed_addr #0 align 2 {
  tail call void @_ZN6nv_dds9CDDSImage4flipERNS_8CSurfaceE(ptr noundef nonnull align 8 dereferenceable(104) %0, ptr noundef nonnull align 8 dereferenceable(32) %1)
  %3 = tail call noundef i32 @_ZNK6nv_dds8CTexture15get_num_mipmapsEv(ptr noundef nonnull align 8 dereferenceable(112) %1)
  %.not = icmp eq i32 %3, 0
  br i1 %.not, label %._crit_edge, label %.lr.ph

._crit_edge:                                      ; preds = %.lr.ph, %2
  ret void

.lr.ph:                                           ; preds = %2, %.lr.ph
  %.06 = phi i32 [ %5, %.lr.ph ], [ 0, %2 ]
  %4 = tail call noundef nonnull align 8 dereferenceable(32) ptr @_ZN6nv_dds8CTexture10get_mipmapEj(ptr noundef nonnull align 8 dereferenceable(112) %1, i32 noundef %.06)
  tail call void @_ZN6nv_dds9CDDSImage4flipERNS_8CSurfaceE(ptr noundef nonnull align 8 dereferenceable(104) %0, ptr noundef nonnull align 8 dereferenceable(32) %4)
  %5 = add nuw i32 %.06, 1
  %6 = tail call noundef i32 @_ZNK6nv_dds8CTexture15get_num_mipmapsEv(ptr noundef nonnull align 8 dereferenceable(112) %1)
  %7 = icmp ult i32 %5, %6
  br i1 %7, label %.lr.ph, label %._crit_edge, !llvm.loop !5
}

attributes #0 = { mustprogress 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 = { inlinehint mustprogress 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" }

!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"}


; Effective O3 passes: CorrelatedValuePropagationPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimplifyCFGPass,TailCallElimPass