; LLVM IR from corentinartaud/graphics :: ThirdParty/freetype-2.9/src/pcf (pcfutil)

; 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 @TwoByteSwap(ptr noundef %0, i64 noundef %1) #1 {
  %3 = alloca ptr, align 8
  %4 = alloca i64, align 8
  %5 = alloca i8, align 1
  store ptr %0, ptr %3, align 8, !tbaa !5
  store i64 %1, ptr %4, align 8, !tbaa !9
  br label %6

6:                                                ; preds = %21, %2
  %7 = load i64, ptr %4, align 8, !tbaa !9
  %8 = icmp uge i64 %7, 2
  br i1 %8, label %9, label %26

9:                                                ; preds = %6
  call void @llvm.lifetime.start.p0(i64 1, ptr %5) #2
  %10 = load ptr, ptr %3, align 8, !tbaa !5
  %11 = getelementptr inbounds i8, ptr %10, i64 0
  %12 = load i8, ptr %11, align 1, !tbaa !11
  store i8 %12, ptr %5, align 1, !tbaa !11
  %13 = load ptr, ptr %3, align 8, !tbaa !5
  %14 = getelementptr inbounds i8, ptr %13, i64 1
  %15 = load i8, ptr %14, align 1, !tbaa !11
  %16 = load ptr, ptr %3, align 8, !tbaa !5
  %17 = getelementptr inbounds i8, ptr %16, i64 0
  store i8 %15, ptr %17, align 1, !tbaa !11
  %18 = load i8, ptr %5, align 1, !tbaa !11
  %19 = load ptr, ptr %3, align 8, !tbaa !5
  %20 = getelementptr inbounds i8, ptr %19, i64 1
  store i8 %18, ptr %20, align 1, !tbaa !11
  call void @llvm.lifetime.end.p0(i64 1, ptr %5) #2
  br label %21

21:                                               ; preds = %9
  %22 = load i64, ptr %4, align 8, !tbaa !9
  %23 = sub i64 %22, 2
  store i64 %23, ptr %4, align 8, !tbaa !9
  %24 = load ptr, ptr %3, align 8, !tbaa !5
  %25 = getelementptr inbounds i8, ptr %24, i64 2
  store ptr %25, ptr %3, align 8, !tbaa !5
  br label %6, !llvm.loop !12

26:                                               ; preds = %6
  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 @TwoByteSwap(ptr nocapture noundef %0, i64 noundef %1) local_unnamed_addr #0 {
  %3 = icmp ugt i64 %1, 1
  br i1 %3, label %.lr.ph.preheader, label %._crit_edge

.lr.ph.preheader:                                 ; preds = %2
  %4 = add i64 %1, -2
  %5 = lshr i64 %4, 1
  %6 = add nuw i64 %5, 1
  %xtraiter = and i64 %6, 3
  %lcmp.mod.not = icmp eq i64 %xtraiter, 0
  br i1 %lcmp.mod.not, label %.lr.ph.prol.loopexit, label %.lr.ph.prol

.lr.ph.prol:                                      ; preds = %.lr.ph.preheader, %.lr.ph.prol
  %.09.prol = phi ptr [ %11, %.lr.ph.prol ], [ %0, %.lr.ph.preheader ]
  %.078.prol = phi i64 [ %10, %.lr.ph.prol ], [ %1, %.lr.ph.preheader ]
  %prol.iter = phi i64 [ %prol.iter.next, %.lr.ph.prol ], [ 0, %.lr.ph.preheader ]
  %7 = load i8, ptr %.09.prol, align 1, !tbaa !5
  %8 = getelementptr inbounds i8, ptr %.09.prol, i64 1
  %9 = load i8, ptr %8, align 1, !tbaa !5
  store i8 %9, ptr %.09.prol, align 1, !tbaa !5
  store i8 %7, ptr %8, align 1, !tbaa !5
  %10 = add i64 %.078.prol, -2
  %11 = getelementptr inbounds i8, ptr %.09.prol, i64 2
  %prol.iter.next = add i64 %prol.iter, 1
  %prol.iter.cmp.not = icmp eq i64 %prol.iter.next, %xtraiter
  br i1 %prol.iter.cmp.not, label %.lr.ph.prol.loopexit, label %.lr.ph.prol, !llvm.loop !8

.lr.ph.prol.loopexit:                             ; preds = %.lr.ph.prol, %.lr.ph.preheader
  %.09.unr = phi ptr [ %0, %.lr.ph.preheader ], [ %11, %.lr.ph.prol ]
  %.078.unr = phi i64 [ %1, %.lr.ph.preheader ], [ %10, %.lr.ph.prol ]
  %12 = icmp ult i64 %4, 6
  br i1 %12, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %.lr.ph.prol.loopexit, %.lr.ph
  %.09 = phi ptr [ %29, %.lr.ph ], [ %.09.unr, %.lr.ph.prol.loopexit ]
  %.078 = phi i64 [ %28, %.lr.ph ], [ %.078.unr, %.lr.ph.prol.loopexit ]
  %13 = load i8, ptr %.09, align 1, !tbaa !5
  %14 = getelementptr inbounds i8, ptr %.09, i64 1
  %15 = load i8, ptr %14, align 1, !tbaa !5
  store i8 %15, ptr %.09, align 1, !tbaa !5
  store i8 %13, ptr %14, align 1, !tbaa !5
  %16 = getelementptr inbounds i8, ptr %.09, i64 2
  %17 = load i8, ptr %16, align 1, !tbaa !5
  %18 = getelementptr inbounds i8, ptr %.09, i64 3
  %19 = load i8, ptr %18, align 1, !tbaa !5
  store i8 %19, ptr %16, align 1, !tbaa !5
  store i8 %17, ptr %18, align 1, !tbaa !5
  %20 = getelementptr inbounds i8, ptr %.09, i64 4
  %21 = load i8, ptr %20, align 1, !tbaa !5
  %22 = getelementptr inbounds i8, ptr %.09, i64 5
  %23 = load i8, ptr %22, align 1, !tbaa !5
  store i8 %23, ptr %20, align 1, !tbaa !5
  store i8 %21, ptr %22, align 1, !tbaa !5
  %24 = getelementptr inbounds i8, ptr %.09, i64 6
  %25 = load i8, ptr %24, align 1, !tbaa !5
  %26 = getelementptr inbounds i8, ptr %.09, i64 7
  %27 = load i8, ptr %26, align 1, !tbaa !5
  store i8 %27, ptr %24, align 1, !tbaa !5
  store i8 %25, ptr %26, align 1, !tbaa !5
  %28 = add i64 %.078, -8
  %29 = getelementptr inbounds i8, ptr %.09, i64 8
  %30 = icmp ugt i64 %28, 1
  br i1 %30, label %.lr.ph, label %._crit_edge, !llvm.loop !10

._crit_edge:                                      ; preds = %.lr.ph.prol.loopexit, %.lr.ph, %2
  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.unroll.disable"}
!10 = distinct !{!10, !11}
!11 = !{!"llvm.loop.mustprogress"}


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