; LLVM IR from rdguez-mariano/fast_imas_IPOL :: libUSAC/utils/FundmatrixFunctions.ll (ZN6FTools8myMemCpyEPvPKvm)

; 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: mustprogress nounwind uwtable
define dso_local void @_ZN6FTools8myMemCpyEPvPKvm(ptr noundef %0, ptr noundef %1, i64 noundef %2) #1 {
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca i64, align 8
  %7 = alloca ptr, align 8
  %8 = alloca ptr, align 8
  %9 = alloca i32, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !5
  store i64 %2, ptr %6, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #2
  %10 = load ptr, ptr %5, align 8, !tbaa !5
  store ptr %10, ptr %7, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #2
  %11 = load ptr, ptr %4, align 8, !tbaa !5
  store ptr %11, ptr %8, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #2
  store i32 0, ptr %9, align 4, !tbaa !11
  br label %12

12:                                               ; preds = %28, %3
  %13 = load i32, ptr %9, align 4, !tbaa !11
  %14 = sext i32 %13 to i64
  %15 = load i64, ptr %6, align 8, !tbaa !9
  %16 = icmp ult i64 %14, %15
  br i1 %16, label %18, label %17

17:                                               ; preds = %12
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #2
  br label %31

18:                                               ; preds = %12
  %19 = load ptr, ptr %7, align 8, !tbaa !5
  %20 = load i32, ptr %9, align 4, !tbaa !11
  %21 = sext i32 %20 to i64
  %22 = getelementptr inbounds i8, ptr %19, i64 %21
  %23 = load i8, ptr %22, align 1, !tbaa !13
  %24 = load ptr, ptr %8, align 8, !tbaa !5
  %25 = load i32, ptr %9, align 4, !tbaa !11
  %26 = sext i32 %25 to i64
  %27 = getelementptr inbounds i8, ptr %24, i64 %26
  store i8 %23, ptr %27, align 1, !tbaa !13
  br label %28

28:                                               ; preds = %18
  %29 = load i32, ptr %9, align 4, !tbaa !11
  %30 = add nsw i32 %29, 1
  store i32 %30, ptr %9, align 4, !tbaa !11
  br label %12, !llvm.loop !14

31:                                               ; preds = %17
  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 = { 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" }
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++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"long", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"int", !7, i64 0}
!13 = !{!7, !7, i64 0}
!14 = distinct !{!14, !15}
!15 = !{!"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: mustprogress nofree norecurse nosync nounwind memory(argmem: readwrite) uwtable
define dso_local void @_ZN6FTools8myMemCpyEPvPKvm(ptr nocapture noundef writeonly %0, ptr nocapture noundef readonly %1, i64 noundef %2) local_unnamed_addr #0 {
  %.not = icmp eq i64 %2, 0
  br i1 %.not, label %._crit_edge, label %iter.check

iter.check:                                       ; preds = %3
  %4 = ptrtoint ptr %0 to i64
  %5 = ptrtoint ptr %1 to i64
  %min.iters.check = icmp ult i64 %2, 8
  %6 = sub i64 %4, %5
  %diff.check = icmp ult i64 %6, 32
  %or.cond = or i1 %min.iters.check, %diff.check
  br i1 %or.cond, label %.lr.ph.preheader, label %vector.main.loop.iter.check

vector.main.loop.iter.check:                      ; preds = %iter.check
  %min.iters.check11 = icmp ult i64 %2, 32
  br i1 %min.iters.check11, label %vec.epilog.ph, label %vector.ph

vector.ph:                                        ; preds = %vector.main.loop.iter.check
  %n.vec = and i64 %2, -32
  br label %vector.body

vector.body:                                      ; preds = %vector.body, %vector.ph
  %index = phi i64 [ 0, %vector.ph ], [ %index.next, %vector.body ]
  %7 = getelementptr inbounds i8, ptr %1, i64 %index
  %8 = getelementptr inbounds i8, ptr %7, i64 16
  %wide.load = load <16 x i8>, ptr %7, align 1, !tbaa !5
  %wide.load12 = load <16 x i8>, ptr %8, align 1, !tbaa !5
  %9 = getelementptr inbounds i8, ptr %0, i64 %index
  %10 = getelementptr inbounds i8, ptr %9, i64 16
  store <16 x i8> %wide.load, ptr %9, align 1, !tbaa !5
  store <16 x i8> %wide.load12, ptr %10, align 1, !tbaa !5
  %index.next = add nuw i64 %index, 32
  %11 = icmp eq i64 %index.next, %n.vec
  br i1 %11, label %middle.block, label %vector.body, !llvm.loop !8

middle.block:                                     ; preds = %vector.body
  %cmp.n = icmp eq i64 %n.vec, %2
  br i1 %cmp.n, label %._crit_edge, label %vec.epilog.iter.check

vec.epilog.iter.check:                            ; preds = %middle.block
  %n.vec.remaining = and i64 %2, 24
  %min.epilog.iters.check = icmp eq i64 %n.vec.remaining, 0
  br i1 %min.epilog.iters.check, label %.lr.ph.preheader, label %vec.epilog.ph

.lr.ph.preheader:                                 ; preds = %vec.epilog.middle.block, %iter.check, %vec.epilog.iter.check
  %indvars.iv.ph = phi i64 [ 0, %iter.check ], [ %n.vec, %vec.epilog.iter.check ], [ %n.vec14, %vec.epilog.middle.block ]
  %xtraiter = and i64 %2, 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
  %indvars.iv.prol = phi i64 [ %indvars.iv.next.prol, %.lr.ph.prol ], [ %indvars.iv.ph, %.lr.ph.preheader ]
  %prol.iter = phi i64 [ %prol.iter.next, %.lr.ph.prol ], [ 0, %.lr.ph.preheader ]
  %12 = getelementptr inbounds i8, ptr %1, i64 %indvars.iv.prol
  %13 = load i8, ptr %12, align 1, !tbaa !5
  %14 = getelementptr inbounds i8, ptr %0, i64 %indvars.iv.prol
  store i8 %13, ptr %14, align 1, !tbaa !5
  %indvars.iv.next.prol = add nuw nsw i64 %indvars.iv.prol, 1
  %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 !12

.lr.ph.prol.loopexit:                             ; preds = %.lr.ph.prol, %.lr.ph.preheader
  %indvars.iv.unr = phi i64 [ %indvars.iv.ph, %.lr.ph.preheader ], [ %indvars.iv.next.prol, %.lr.ph.prol ]
  %15 = sub i64 %indvars.iv.ph, %2
  %16 = icmp ugt i64 %15, -4
  br i1 %16, label %._crit_edge, label %.lr.ph

vec.epilog.ph:                                    ; preds = %vector.main.loop.iter.check, %vec.epilog.iter.check
  %vec.epilog.resume.val = phi i64 [ %n.vec, %vec.epilog.iter.check ], [ 0, %vector.main.loop.iter.check ]
  %n.vec14 = and i64 %2, -8
  br label %vec.epilog.vector.body

vec.epilog.vector.body:                           ; preds = %vec.epilog.vector.body, %vec.epilog.ph
  %index15 = phi i64 [ %vec.epilog.resume.val, %vec.epilog.ph ], [ %index.next17, %vec.epilog.vector.body ]
  %17 = getelementptr inbounds i8, ptr %1, i64 %index15
  %wide.load16 = load <8 x i8>, ptr %17, align 1, !tbaa !5
  %18 = getelementptr inbounds i8, ptr %0, i64 %index15
  store <8 x i8> %wide.load16, ptr %18, align 1, !tbaa !5
  %index.next17 = add nuw i64 %index15, 8
  %19 = icmp eq i64 %index.next17, %n.vec14
  br i1 %19, label %vec.epilog.middle.block, label %vec.epilog.vector.body, !llvm.loop !14

vec.epilog.middle.block:                          ; preds = %vec.epilog.vector.body
  %cmp.n18 = icmp eq i64 %n.vec14, %2
  br i1 %cmp.n18, label %._crit_edge, label %.lr.ph.preheader

._crit_edge:                                      ; preds = %.lr.ph.prol.loopexit, %.lr.ph, %middle.block, %vec.epilog.middle.block, %3
  ret void

.lr.ph:                                           ; preds = %.lr.ph.prol.loopexit, %.lr.ph
  %indvars.iv = phi i64 [ %indvars.iv.next.3, %.lr.ph ], [ %indvars.iv.unr, %.lr.ph.prol.loopexit ]
  %20 = getelementptr inbounds i8, ptr %1, i64 %indvars.iv
  %21 = load i8, ptr %20, align 1, !tbaa !5
  %22 = getelementptr inbounds i8, ptr %0, i64 %indvars.iv
  store i8 %21, ptr %22, align 1, !tbaa !5
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %23 = getelementptr inbounds i8, ptr %1, i64 %indvars.iv.next
  %24 = load i8, ptr %23, align 1, !tbaa !5
  %25 = getelementptr inbounds i8, ptr %0, i64 %indvars.iv.next
  store i8 %24, ptr %25, align 1, !tbaa !5
  %indvars.iv.next.1 = add nuw nsw i64 %indvars.iv, 2
  %26 = getelementptr inbounds i8, ptr %1, i64 %indvars.iv.next.1
  %27 = load i8, ptr %26, align 1, !tbaa !5
  %28 = getelementptr inbounds i8, ptr %0, i64 %indvars.iv.next.1
  store i8 %27, ptr %28, align 1, !tbaa !5
  %indvars.iv.next.2 = add nuw nsw i64 %indvars.iv, 3
  %29 = getelementptr inbounds i8, ptr %1, i64 %indvars.iv.next.2
  %30 = load i8, ptr %29, align 1, !tbaa !5
  %31 = getelementptr inbounds i8, ptr %0, i64 %indvars.iv.next.2
  store i8 %30, ptr %31, align 1, !tbaa !5
  %indvars.iv.next.3 = add nuw nsw i64 %indvars.iv, 4
  %exitcond.not.3 = icmp eq i64 %indvars.iv.next.3, %2
  br i1 %exitcond.not.3, label %._crit_edge, label %.lr.ph, !llvm.loop !15
}

attributes #0 = { mustprogress 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++ TBAA"}
!8 = distinct !{!8, !9, !10, !11}
!9 = !{!"llvm.loop.mustprogress"}
!10 = !{!"llvm.loop.isvectorized", i32 1}
!11 = !{!"llvm.loop.unroll.runtime.disable"}
!12 = distinct !{!12, !13}
!13 = !{!"llvm.loop.unroll.disable"}
!14 = distinct !{!14, !9, !10, !11}
!15 = distinct !{!15, !9, !10}


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