; LLVM IR from tenok-rtos/tenok :: user/debug-link (debug_link)

; 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"

%struct.debug_link_payload_t = type { ptr, i32 }

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: readwrite)
declare void @llvm.memcpy.p0.p0.i64(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, i64, i1 immarg) #0

; 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

; Function Attrs: nounwind uwtable
define dso_local void @pack_debug_link_msg_double(ptr noundef %0, ptr noundef %1, i64 noundef %2) #2 {
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca i64, align 8
  %7 = 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 4, ptr %7) #3
  store i32 0, ptr %7, align 4, !tbaa !11
  br label %8

8:                                                ; preds = %30, %3
  %9 = load i32, ptr %7, align 4, !tbaa !11
  %10 = sext i32 %9 to i64
  %11 = load i64, ptr %6, align 8, !tbaa !9
  %12 = icmp ult i64 %10, %11
  br i1 %12, label %14, label %13

13:                                               ; preds = %8
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #3
  br label %33

14:                                               ; preds = %8
  %15 = load ptr, ptr %5, align 8, !tbaa !5
  %16 = getelementptr inbounds %struct.debug_link_payload_t, ptr %15, i32 0, i32 0
  %17 = load ptr, ptr %16, align 8, !tbaa !13
  %18 = load ptr, ptr %5, align 8, !tbaa !5
  %19 = getelementptr inbounds %struct.debug_link_payload_t, ptr %18, i32 0, i32 1
  %20 = load i32, ptr %19, align 8, !tbaa !15
  %21 = sext i32 %20 to i64
  %22 = getelementptr inbounds i8, ptr %17, i64 %21
  %23 = load ptr, ptr %4, align 8, !tbaa !5
  call void @llvm.memcpy.p0.p0.i64(ptr align 1 %22, ptr align 1 %23, i64 8, i1 false)
  %24 = load ptr, ptr %5, align 8, !tbaa !5
  %25 = getelementptr inbounds %struct.debug_link_payload_t, ptr %24, i32 0, i32 1
  %26 = load i32, ptr %25, align 8, !tbaa !15
  %27 = sext i32 %26 to i64
  %28 = add i64 %27, 8
  %29 = trunc i64 %28 to i32
  store i32 %29, ptr %25, align 8, !tbaa !15
  br label %30

30:                                               ; preds = %14
  %31 = load i32, ptr %7, align 4, !tbaa !11
  %32 = add nsw i32 %31, 1
  store i32 %32, ptr %7, align 4, !tbaa !11
  br label %8, !llvm.loop !16

33:                                               ; preds = %13
  ret void
}

attributes #0 = { nocallback nofree nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { 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 #3 = { 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 = !{!12, !12, i64 0}
!12 = !{!"int", !7, i64 0}
!13 = !{!14, !6, i64 0}
!14 = !{!"", !6, i64 0, !12, i64 8}
!15 = !{!14, !12, i64 8}
!16 = distinct !{!16, !17}
!17 = !{!"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(write, argmem: readwrite, inaccessiblemem: none) uwtable
define dso_local void @pack_debug_link_msg_double(ptr nocapture noundef readonly %0, ptr nocapture noundef %1, i64 noundef %2) local_unnamed_addr #0 {
  %.not = icmp eq i64 %2, 0
  br i1 %.not, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %3
  %4 = getelementptr inbounds i8, ptr %1, i64 8
  %.pre = load i32, ptr %4, align 8, !tbaa !5
  %xtraiter = and i64 %2, 1
  %5 = icmp eq i64 %2, 1
  br i1 %5, label %._crit_edge.loopexit.unr-lcssa, label %.lr.ph.new

.lr.ph.new:                                       ; preds = %.lr.ph
  %unroll_iter = and i64 %2, -2
  br label %12

._crit_edge.loopexit.unr-lcssa:                   ; preds = %12, %.lr.ph
  %.unr = phi i32 [ %.pre, %.lr.ph ], [ %25, %12 ]
  %lcmp.mod.not = icmp eq i64 %xtraiter, 0
  br i1 %lcmp.mod.not, label %._crit_edge, label %._crit_edge.loopexit.epilog-lcssa

._crit_edge.loopexit.epilog-lcssa:                ; preds = %._crit_edge.loopexit.unr-lcssa
  %6 = load ptr, ptr %1, align 8, !tbaa !11
  %7 = sext i32 %.unr to i64
  %8 = getelementptr inbounds i8, ptr %6, i64 %7
  %9 = load i64, ptr %0, align 1
  store i64 %9, ptr %8, align 1
  %10 = load i32, ptr %4, align 8, !tbaa !5
  %11 = add i32 %10, 8
  store i32 %11, ptr %4, align 8, !tbaa !5
  br label %._crit_edge

._crit_edge:                                      ; preds = %._crit_edge.loopexit.epilog-lcssa, %._crit_edge.loopexit.unr-lcssa, %3
  ret void

12:                                               ; preds = %12, %.lr.ph.new
  %13 = phi i32 [ %.pre, %.lr.ph.new ], [ %25, %12 ]
  %niter = phi i64 [ 0, %.lr.ph.new ], [ %niter.next.1, %12 ]
  %14 = load ptr, ptr %1, align 8, !tbaa !11
  %15 = sext i32 %13 to i64
  %16 = getelementptr inbounds i8, ptr %14, i64 %15
  %17 = load i64, ptr %0, align 1
  store i64 %17, ptr %16, align 1
  %18 = load i32, ptr %4, align 8, !tbaa !5
  %19 = add i32 %18, 8
  store i32 %19, ptr %4, align 8, !tbaa !5
  %20 = load ptr, ptr %1, align 8, !tbaa !11
  %21 = sext i32 %19 to i64
  %22 = getelementptr inbounds i8, ptr %20, i64 %21
  %23 = load i64, ptr %0, align 1
  store i64 %23, ptr %22, align 1
  %24 = load i32, ptr %4, align 8, !tbaa !5
  %25 = add i32 %24, 8
  store i32 %25, ptr %4, align 8, !tbaa !5
  %niter.next.1 = add i64 %niter, 2
  %niter.ncmp.1 = icmp eq i64 %niter.next.1, %unroll_iter
  br i1 %niter.ncmp.1, label %._crit_edge.loopexit.unr-lcssa, label %12, !llvm.loop !12
}

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


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