; LLVM IR from pdeljanov/Ayane :: src/BufferFormat.ll (ZN5Ayane12BufferFormatC2Ejj)

; 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"

%"class.Ayane::BufferFormat" = type { i32, i32, i32 }

@_ZZN5Ayane12BufferFormatC1EjjE6lookup = external hidden constant [16 x i32], align 16

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_ZN5Ayane12BufferFormatC2Ejj(ptr noundef nonnull align 4 dereferenceable(12) %0, i32 noundef %1, i32 noundef %2) unnamed_addr #0 align 2 {
  %4 = alloca ptr, align 8
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store i32 %1, ptr %5, align 4, !tbaa !9
  store i32 %2, ptr %6, align 4, !tbaa !9
  %7 = load ptr, ptr %4, align 8
  %8 = getelementptr inbounds %"class.Ayane::BufferFormat", ptr %7, i32 0, i32 0
  %9 = load i32, ptr %5, align 4, !tbaa !9
  store i32 %9, ptr %8, align 4, !tbaa !11
  %10 = getelementptr inbounds %"class.Ayane::BufferFormat", ptr %7, i32 0, i32 1
  %11 = load i32, ptr %6, align 4, !tbaa !9
  store i32 %11, ptr %10, align 4, !tbaa !13
  %12 = getelementptr inbounds %"class.Ayane::BufferFormat", ptr %7, i32 0, i32 2
  store i32 0, ptr %12, align 4, !tbaa !14
  br label %13

13:                                               ; preds = %25, %3
  %14 = load i32, ptr %5, align 4, !tbaa !9
  %15 = icmp ne i32 %14, 0
  br i1 %15, label %16, label %28

16:                                               ; preds = %13
  %17 = load i32, ptr %5, align 4, !tbaa !9
  %18 = and i32 %17, 15
  %19 = zext i32 %18 to i64
  %20 = getelementptr inbounds [16 x i32], ptr @_ZZN5Ayane12BufferFormatC1EjjE6lookup, i64 0, i64 %19
  %21 = load i32, ptr %20, align 4, !tbaa !9
  %22 = getelementptr inbounds %"class.Ayane::BufferFormat", ptr %7, i32 0, i32 2
  %23 = load i32, ptr %22, align 4, !tbaa !14
  %24 = add i32 %23, %21
  store i32 %24, ptr %22, align 4, !tbaa !14
  br label %25

25:                                               ; preds = %16
  %26 = load i32, ptr %5, align 4, !tbaa !9
  %27 = lshr i32 %26, 4
  store i32 %27, ptr %5, align 4, !tbaa !9
  br label %13, !llvm.loop !15

28:                                               ; preds = %13
  ret void
}

attributes #0 = { 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 = !{!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 = !{!12, !10, i64 0}
!12 = !{!"_ZTSN5Ayane12BufferFormatE", !10, i64 0, !10, i64 4, !10, i64 8}
!13 = !{!12, !10, i64 4}
!14 = !{!12, !10, i64 8}
!15 = distinct !{!15, !16}
!16 = !{!"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"

@_ZZN5Ayane12BufferFormatC1EjjE6lookup = external hidden local_unnamed_addr constant [16 x i32], align 16

; Function Attrs: mustprogress nofree norecurse nosync nounwind memory(argmem: write) uwtable
define dso_local void @_ZN5Ayane12BufferFormatC2Ejj(ptr nocapture noundef nonnull writeonly align 4 dereferenceable(12) %0, i32 noundef %1, i32 noundef %2) unnamed_addr #0 align 2 {
  store i32 %1, ptr %0, align 4, !tbaa !5
  %4 = getelementptr inbounds i8, ptr %0, i64 4
  store i32 %2, ptr %4, align 4, !tbaa !10
  %5 = getelementptr inbounds i8, ptr %0, i64 8
  store i32 0, ptr %5, align 4, !tbaa !11
  %.not5 = icmp eq i32 %1, 0
  br i1 %.not5, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %3, %.lr.ph
  %.06 = phi i32 [ %12, %.lr.ph ], [ %1, %3 ]
  %6 = phi i32 [ %11, %.lr.ph ], [ 0, %3 ]
  %7 = and i32 %.06, 15
  %8 = zext nneg i32 %7 to i64
  %9 = getelementptr inbounds [16 x i32], ptr @_ZZN5Ayane12BufferFormatC1EjjE6lookup, i64 0, i64 %8
  %10 = load i32, ptr %9, align 4, !tbaa !12
  %11 = add i32 %6, %10
  store i32 %11, ptr %5, align 4, !tbaa !11
  %12 = lshr i32 %.06, 4
  %.not = icmp ult i32 %.06, 16
  br i1 %.not, label %._crit_edge, label %.lr.ph, !llvm.loop !13

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

attributes #0 = { mustprogress nofree norecurse nosync nounwind memory(argmem: write) 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, !7, i64 0}
!6 = !{!"_ZTSN5Ayane12BufferFormatE", !7, i64 0, !7, i64 4, !7, i64 8}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}
!10 = !{!6, !7, i64 4}
!11 = !{!6, !7, i64 8}
!12 = !{!7, !7, i64 0}
!13 = distinct !{!13, !14}
!14 = !{!"llvm.loop.mustprogress"}


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