; LLVM IR from zchrissirhcz/pixel :: perfs/rgb2bgr (rgb2bgr)

; 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: nounwind uwtable
define dso_local void @rgb2bgr_inplace_asm(ptr noundef %0, i64 noundef %1, i64 noundef %2) #1 {
  %4 = alloca ptr, align 8
  %5 = alloca i64, align 8
  %6 = alloca i64, align 8
  %7 = alloca i64, align 8
  %8 = alloca i64, align 8
  %9 = alloca i8, align 1
  store ptr %0, ptr %4, align 8, !tbaa !5
  store i64 %1, ptr %5, align 8, !tbaa !9
  store i64 %2, ptr %6, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #2
  store i64 0, ptr %7, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #2
  %10 = load i64, ptr %5, align 8, !tbaa !9
  %11 = load i64, ptr %6, align 8, !tbaa !9
  %12 = mul i64 %10, %11
  %13 = mul i64 %12, 3
  store i64 %13, ptr %8, align 8, !tbaa !9
  br label %14

14:                                               ; preds = %32, %3
  %15 = load i64, ptr %7, align 8, !tbaa !9
  %16 = load i64, ptr %8, align 8, !tbaa !9
  %17 = icmp ult i64 %15, %16
  br i1 %17, label %18, label %35

18:                                               ; preds = %14
  call void @llvm.lifetime.start.p0(i64 1, ptr %9) #2
  %19 = load ptr, ptr %4, align 8, !tbaa !5
  %20 = getelementptr inbounds i8, ptr %19, i64 0
  %21 = load i8, ptr %20, align 1, !tbaa !11
  store i8 %21, ptr %9, align 1, !tbaa !11
  %22 = load ptr, ptr %4, align 8, !tbaa !5
  %23 = getelementptr inbounds i8, ptr %22, i64 2
  %24 = load i8, ptr %23, align 1, !tbaa !11
  %25 = load ptr, ptr %4, align 8, !tbaa !5
  %26 = getelementptr inbounds i8, ptr %25, i64 0
  store i8 %24, ptr %26, align 1, !tbaa !11
  %27 = load i8, ptr %9, align 1, !tbaa !11
  %28 = load ptr, ptr %4, align 8, !tbaa !5
  %29 = getelementptr inbounds i8, ptr %28, i64 2
  store i8 %27, ptr %29, align 1, !tbaa !11
  %30 = load ptr, ptr %4, align 8, !tbaa !5
  %31 = getelementptr inbounds i8, ptr %30, i64 3
  store ptr %31, ptr %4, align 8, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 1, ptr %9) #2
  br label %32

32:                                               ; preds = %18
  %33 = load i64, ptr %7, align 8, !tbaa !9
  %34 = add i64 %33, 3
  store i64 %34, ptr %7, align 8, !tbaa !9
  br label %14, !llvm.loop !12

35:                                               ; preds = %14
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #2
  ret void
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #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 = !{!"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: nofree norecurse nosync nounwind memory(readwrite, inaccessiblemem: none) uwtable
define dso_local void @rgb2bgr_inplace_asm(ptr nocapture noundef %0, i64 noundef %1, i64 noundef %2) local_unnamed_addr #0 {
  %4 = mul i64 %1, 3
  %5 = mul i64 %4, %2
  %.not = icmp eq i64 %5, 0
  br i1 %.not, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %3, %.lr.ph
  %.012 = phi ptr [ %9, %.lr.ph ], [ %0, %3 ]
  %.01011 = phi i64 [ %10, %.lr.ph ], [ 0, %3 ]
  %6 = load i8, ptr %.012, align 1, !tbaa !5
  %7 = getelementptr inbounds i8, ptr %.012, i64 2
  %8 = load i8, ptr %7, align 1, !tbaa !5
  store i8 %8, ptr %.012, align 1, !tbaa !5
  store i8 %6, ptr %7, align 1, !tbaa !5
  %9 = getelementptr inbounds i8, ptr %.012, i64 3
  %10 = add i64 %.01011, 3
  %11 = icmp ult i64 %10, %5
  br i1 %11, label %.lr.ph, label %._crit_edge, !llvm.loop !8

._crit_edge:                                      ; preds = %.lr.ph, %3
  ret void
}

attributes #0 = { nofree norecurse nosync nounwind memory(readwrite, inaccessiblemem: none) 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: EarlyCSEPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass