; LLVM IR from nickmqb/muon :: bootstrap/mu.ll_CGenerator (writeNestedTag__)

; 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.string__ = type { ptr, i32 }
%struct.tag_____Tag__ = type { ptr, ptr }
%struct.tag_____Array__Tag____ = type { ptr, i32 }

@mu_____string401 = external dso_local global %struct.string__, align 8

; 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: 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) #1

; Function Attrs: nounwind uwtable
declare dso_local void @StringBuilder__write__(ptr noundef, ptr, i32) #2

; Function Attrs: nounwind uwtable
declare dso_local void @CGenerator__writeNs__(ptr noundef, ptr noundef) #2

; Function Attrs: nounwind uwtable
define dso_local void @CGenerator__writeNestedTag__(ptr noundef %0, ptr %1, ptr %2) #2 {
  %4 = alloca %struct.tag_____Tag__, align 8
  %5 = alloca ptr, align 8
  %6 = alloca ptr, align 8
  %7 = alloca i32, align 4
  %8 = alloca %struct.tag_____Tag__, align 8
  %9 = getelementptr inbounds { ptr, ptr }, ptr %4, i32 0, i32 0
  store ptr %1, ptr %9, align 8
  %10 = getelementptr inbounds { ptr, ptr }, ptr %4, i32 0, i32 1
  store ptr %2, ptr %10, align 8
  store ptr %0, ptr %5, align 8, !tbaa !5
  %11 = load ptr, ptr %5, align 8, !tbaa !5
  %12 = getelementptr inbounds %struct.tag_____Tag__, ptr %4, i32 0, i32 0
  %13 = load ptr, ptr %12, align 8, !tbaa !9
  call void @CGenerator__writeNs__(ptr noundef %11, ptr noundef %13)
  %14 = getelementptr inbounds %struct.tag_____Tag__, ptr %4, i32 0, i32 1
  %15 = load ptr, ptr %14, align 8, !tbaa !11
  %16 = icmp ne ptr %15, null
  br i1 %16, label %17, label %44

17:                                               ; preds = %3
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #3
  %18 = getelementptr inbounds %struct.tag_____Tag__, ptr %4, i32 0, i32 1
  %19 = load ptr, ptr %18, align 8, !tbaa !11
  store ptr %19, ptr %6, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #3
  store i32 0, ptr %7, align 4, !tbaa !12
  br label %20

20:                                               ; preds = %26, %17
  %21 = load i32, ptr %7, align 4, !tbaa !12
  %22 = load ptr, ptr %6, align 8, !tbaa !5
  %23 = getelementptr inbounds %struct.tag_____Array__Tag____, ptr %22, i32 0, i32 1
  %24 = load i32, ptr %23, align 8, !tbaa !14
  %25 = icmp slt i32 %21, %24
  br i1 %25, label %26, label %40

26:                                               ; preds = %20
  call void @llvm.lifetime.start.p0(i64 16, ptr %8) #3
  %27 = load ptr, ptr %6, align 8, !tbaa !5
  %28 = getelementptr inbounds %struct.tag_____Array__Tag____, ptr %27, i32 0, i32 0
  %29 = load ptr, ptr %28, align 8, !tbaa !16
  %30 = load i32, ptr %7, align 4, !tbaa !12
  %31 = sext i32 %30 to i64
  %32 = getelementptr inbounds %struct.tag_____Tag__, ptr %29, i64 %31
  call void @llvm.memcpy.p0.p0.i64(ptr align 8 %8, ptr align 8 %32, i64 16, i1 false), !tbaa.struct !17
  %33 = load ptr, ptr %5, align 8, !tbaa !5
  %34 = getelementptr inbounds { ptr, ptr }, ptr %8, i32 0, i32 0
  %35 = load ptr, ptr %34, align 8
  %36 = getelementptr inbounds { ptr, ptr }, ptr %8, i32 0, i32 1
  %37 = load ptr, ptr %36, align 8
  call void @CGenerator__writeNestedTag__(ptr noundef %33, ptr %35, ptr %37)
  %38 = load i32, ptr %7, align 4, !tbaa !12
  %39 = add nsw i32 %38, 1
  store i32 %39, ptr %7, align 4, !tbaa !12
  call void @llvm.lifetime.end.p0(i64 16, ptr %8) #3
  br label %20, !llvm.loop !18

40:                                               ; preds = %20
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #3
  %41 = load ptr, ptr %5, align 8, !tbaa !5
  %42 = load ptr, ptr @mu_____string401, align 8
  %43 = load i32, ptr getelementptr inbounds ({ ptr, i32 }, ptr @mu_____string401, i32 0, i32 1), align 8
  call void @StringBuilder__write__(ptr noundef %41, ptr %42, i32 %43)
  br label %44

44:                                               ; preds = %40, %3
  ret void
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { nocallback nofree 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, !6, i64 0}
!10 = !{!"tag_____Tag__", !6, i64 0, !6, i64 8}
!11 = !{!10, !6, i64 8}
!12 = !{!13, !13, i64 0}
!13 = !{!"int", !7, i64 0}
!14 = !{!15, !13, i64 8}
!15 = !{!"tag_____Array__Tag____", !6, i64 0, !13, i64 8}
!16 = !{!15, !6, i64 0}
!17 = !{i64 0, i64 8, !5, i64 8, i64 8, !5}
!18 = distinct !{!18, !19}
!19 = !{!"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"

%struct.string__ = type { ptr, i32 }
%struct.tag_____Tag__ = type { ptr, ptr }

@mu_____string401 = external dso_local local_unnamed_addr global %struct.string__, align 8

; Function Attrs: nounwind uwtable
declare dso_local void @StringBuilder__write__(ptr noundef, ptr, i32) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
declare dso_local void @CGenerator__writeNs__(ptr noundef, ptr noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local void @CGenerator__writeNestedTag__(ptr noundef %0, ptr %1, ptr readonly %2) local_unnamed_addr #0 {
  tail call void @CGenerator__writeNs__(ptr noundef %0, ptr noundef %1)
  %.not = icmp eq ptr %2, null
  br i1 %.not, label %14, label %.preheader

.preheader:                                       ; preds = %3
  %4 = getelementptr inbounds i8, ptr %2, i64 8
  %5 = load i32, ptr %4, align 8, !tbaa !5
  %6 = icmp sgt i32 %5, 0
  br i1 %6, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %.preheader, %.lr.ph
  %indvars.iv = phi i64 [ %indvars.iv.next, %.lr.ph ], [ 0, %.preheader ]
  %7 = load ptr, ptr %2, align 8, !tbaa !11
  %8 = getelementptr inbounds %struct.tag_____Tag__, ptr %7, i64 %indvars.iv
  %.sroa.0.0.copyload = load ptr, ptr %8, align 8, !tbaa !12
  %.sroa.4.0..sroa_idx = getelementptr inbounds i8, ptr %8, i64 8
  %.sroa.4.0.copyload = load ptr, ptr %.sroa.4.0..sroa_idx, align 8, !tbaa !12
  tail call void @CGenerator__writeNestedTag__(ptr noundef %0, ptr %.sroa.0.0.copyload, ptr %.sroa.4.0.copyload)
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %9 = load i32, ptr %4, align 8, !tbaa !5
  %10 = sext i32 %9 to i64
  %11 = icmp slt i64 %indvars.iv.next, %10
  br i1 %11, label %.lr.ph, label %._crit_edge, !llvm.loop !13

._crit_edge:                                      ; preds = %.lr.ph, %.preheader
  %12 = load ptr, ptr @mu_____string401, align 8
  %13 = load i32, ptr getelementptr inbounds (i8, ptr @mu_____string401, i64 8), align 8
  tail call void @StringBuilder__write__(ptr noundef %0, ptr %12, i32 %13)
  br label %14

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

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" }

!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 = !{!"tag_____Array__Tag____", !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 = !{!7, !7, i64 0}
!13 = distinct !{!13, !14}
!14 = !{!"llvm.loop.mustprogress"}


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