; 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_naive(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 i8, align 1
  %8 = alloca i64, align 8
  %9 = alloca i64, align 8
  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 1, ptr %7) #2
  store i8 0, ptr %7, align 1, !tbaa !11
  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
  call void @llvm.lifetime.start.p0(i64 8, ptr %9) #2
  store i64 0, ptr %9, align 8, !tbaa !9
  br label %14

14:                                               ; preds = %37, %3
  %15 = load i64, ptr %9, align 8, !tbaa !9
  %16 = load i64, ptr %8, align 8, !tbaa !9
  %17 = icmp ult i64 %15, %16
  br i1 %17, label %19, label %18

18:                                               ; preds = %14
  call void @llvm.lifetime.end.p0(i64 8, ptr %9) #2
  br label %40

19:                                               ; preds = %14
  %20 = load ptr, ptr %4, align 8, !tbaa !5
  %21 = load i64, ptr %9, align 8, !tbaa !9
  %22 = getelementptr inbounds i8, ptr %20, i64 %21
  %23 = load i8, ptr %22, align 1, !tbaa !11
  store i8 %23, ptr %7, align 1, !tbaa !11
  %24 = load ptr, ptr %4, align 8, !tbaa !5
  %25 = load i64, ptr %9, align 8, !tbaa !9
  %26 = add i64 %25, 2
  %27 = getelementptr inbounds i8, ptr %24, i64 %26
  %28 = load i8, ptr %27, align 1, !tbaa !11
  %29 = load ptr, ptr %4, align 8, !tbaa !5
  %30 = load i64, ptr %9, align 8, !tbaa !9
  %31 = getelementptr inbounds i8, ptr %29, i64 %30
  store i8 %28, ptr %31, align 1, !tbaa !11
  %32 = load i8, ptr %7, align 1, !tbaa !11
  %33 = load ptr, ptr %4, align 8, !tbaa !5
  %34 = load i64, ptr %9, align 8, !tbaa !9
  %35 = add i64 %34, 2
  %36 = getelementptr inbounds i8, ptr %33, i64 %35
  store i8 %32, ptr %36, align 1, !tbaa !11
  br label %37

37:                                               ; preds = %19
  %38 = load i64, ptr %9, align 8, !tbaa !9
  %39 = add i64 %38, 3
  store i64 %39, ptr %9, align 8, !tbaa !9
  br label %14, !llvm.loop !12

40:                                               ; preds = %18
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #2
  call void @llvm.lifetime.end.p0(i64 1, 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(argmem: readwrite) uwtable
define dso_local void @rgb2bgr_inplace_naive(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

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

.lr.ph:                                           ; preds = %3, %.lr.ph
  %.013 = phi i64 [ %10, %.lr.ph ], [ 0, %3 ]
  %6 = getelementptr inbounds i8, ptr %0, i64 %.013
  %7 = load i8, ptr %6, align 1, !tbaa !5
  %8 = getelementptr i8, ptr %6, i64 2
  %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
  %10 = add i64 %.013, 3
  %11 = icmp ult i64 %10, %5
  br i1 %11, label %.lr.ph, label %._crit_edge, !llvm.loop !8
}

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"}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass