; 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: nounwind uwtable
define dso_local void @rgb2bgr_naive(ptr noundef %0, i64 noundef %1, i64 noundef %2, ptr noundef %3) #0 {
  %5 = alloca ptr, align 8
  %6 = alloca i64, align 8
  %7 = alloca i64, align 8
  %8 = alloca ptr, align 8
  %9 = alloca i64, align 8
  %10 = alloca i64, align 8
  store ptr %0, ptr %5, align 8, !tbaa !5
  store i64 %1, ptr %6, align 8, !tbaa !9
  store i64 %2, ptr %7, align 8, !tbaa !9
  store ptr %3, ptr %8, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %9) #2
  %11 = load i64, ptr %6, align 8, !tbaa !9
  %12 = load i64, ptr %7, align 8, !tbaa !9
  %13 = mul i64 %11, %12
  %14 = mul i64 %13, 3
  store i64 %14, ptr %9, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %10) #2
  store i64 0, ptr %10, align 8, !tbaa !9
  br label %15

15:                                               ; preds = %46, %4
  %16 = load i64, ptr %10, align 8, !tbaa !9
  %17 = load i64, ptr %9, align 8, !tbaa !9
  %18 = icmp ult i64 %16, %17
  br i1 %18, label %20, label %19

19:                                               ; preds = %15
  call void @llvm.lifetime.end.p0(i64 8, ptr %10) #2
  br label %49

20:                                               ; preds = %15
  %21 = load ptr, ptr %5, align 8, !tbaa !5
  %22 = load i64, ptr %10, align 8, !tbaa !9
  %23 = getelementptr inbounds i8, ptr %21, i64 %22
  %24 = load i8, ptr %23, align 1, !tbaa !11
  %25 = load ptr, ptr %8, align 8, !tbaa !5
  %26 = load i64, ptr %10, align 8, !tbaa !9
  %27 = add i64 %26, 2
  %28 = getelementptr inbounds i8, ptr %25, i64 %27
  store i8 %24, ptr %28, align 1, !tbaa !11
  %29 = load ptr, ptr %5, align 8, !tbaa !5
  %30 = load i64, ptr %10, align 8, !tbaa !9
  %31 = add i64 %30, 1
  %32 = getelementptr inbounds i8, ptr %29, i64 %31
  %33 = load i8, ptr %32, align 1, !tbaa !11
  %34 = load ptr, ptr %8, align 8, !tbaa !5
  %35 = load i64, ptr %10, align 8, !tbaa !9
  %36 = add i64 %35, 1
  %37 = getelementptr inbounds i8, ptr %34, i64 %36
  store i8 %33, ptr %37, align 1, !tbaa !11
  %38 = load ptr, ptr %5, align 8, !tbaa !5
  %39 = load i64, ptr %10, align 8, !tbaa !9
  %40 = add i64 %39, 2
  %41 = getelementptr inbounds i8, ptr %38, i64 %40
  %42 = load i8, ptr %41, align 1, !tbaa !11
  %43 = load ptr, ptr %8, align 8, !tbaa !5
  %44 = load i64, ptr %10, align 8, !tbaa !9
  %45 = getelementptr inbounds i8, ptr %43, i64 %44
  store i8 %42, ptr %45, align 1, !tbaa !11
  br label %46

46:                                               ; preds = %20
  %47 = load i64, ptr %10, align 8, !tbaa !9
  %48 = add i64 %47, 3
  store i64 %48, ptr %10, align 8, !tbaa !9
  br label %15, !llvm.loop !12

49:                                               ; preds = %19
  call void @llvm.lifetime.end.p0(i64 8, ptr %9) #2
  ret void
}

; 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 = !{!"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_naive(ptr nocapture noundef readonly %0, i64 noundef %1, i64 noundef %2, ptr nocapture noundef writeonly %3) local_unnamed_addr #0 {
  %5 = mul i64 %1, 3
  %6 = mul i64 %5, %2
  %.not = icmp eq i64 %6, 0
  br i1 %.not, label %._crit_edge, label %.lr.ph

._crit_edge:                                      ; preds = %.lr.ph, %4
  ret void

.lr.ph:                                           ; preds = %4, %.lr.ph
  %.016 = phi i64 [ %18, %.lr.ph ], [ 0, %4 ]
  %7 = getelementptr inbounds i8, ptr %0, i64 %.016
  %8 = load i8, ptr %7, align 1, !tbaa !5
  %9 = add i64 %.016, 2
  %10 = getelementptr inbounds i8, ptr %3, i64 %9
  store i8 %8, ptr %10, align 1, !tbaa !5
  %11 = add nuw i64 %.016, 1
  %12 = getelementptr inbounds i8, ptr %0, i64 %11
  %13 = load i8, ptr %12, align 1, !tbaa !5
  %14 = getelementptr inbounds i8, ptr %3, i64 %11
  store i8 %13, ptr %14, align 1, !tbaa !5
  %15 = getelementptr inbounds i8, ptr %0, i64 %9
  %16 = load i8, ptr %15, align 1, !tbaa !5
  %17 = getelementptr inbounds i8, ptr %3, i64 %.016
  store i8 %16, ptr %17, align 1, !tbaa !5
  %18 = add i64 %.016, 3
  %19 = icmp ult i64 %18, %6
  br i1 %19, 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: CorrelatedValuePropagationPass,EarlyCSEPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass