; LLVM IR from humz2k/sugaryc :: ext/bdwgc/cord (cordxtra)

; 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.__va_list_tag = type { i32, i32, ptr, ptr }

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

declare ptr @CORD_cat(ptr noundef, ptr noundef) #1

; 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 ptr @CORD_catn(i32 noundef %0, ...) #2 {
  %2 = alloca i32, align 4
  %3 = alloca ptr, align 8
  %4 = alloca [1 x %struct.__va_list_tag], align 16
  %5 = alloca i32, align 4
  %6 = alloca ptr, align 8
  store i32 %0, ptr %2, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #4
  store ptr null, ptr %3, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 24, ptr %4) #4
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #4
  %7 = getelementptr inbounds [1 x %struct.__va_list_tag], ptr %4, i64 0, i64 0
  call void @llvm.va_start.p0(ptr %7)
  store i32 0, ptr %5, align 4, !tbaa !5
  br label %8

8:                                                ; preds = %32, %1
  %9 = load i32, ptr %5, align 4, !tbaa !5
  %10 = load i32, ptr %2, align 4, !tbaa !5
  %11 = icmp slt i32 %9, %10
  br i1 %11, label %12, label %35

12:                                               ; preds = %8
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #4
  %13 = getelementptr inbounds [1 x %struct.__va_list_tag], ptr %4, i64 0, i64 0
  %14 = getelementptr inbounds %struct.__va_list_tag, ptr %13, i32 0, i32 0
  %15 = load i32, ptr %14, align 16
  %16 = icmp ule i32 %15, 40
  br i1 %16, label %17, label %22

17:                                               ; preds = %12
  %18 = getelementptr inbounds %struct.__va_list_tag, ptr %13, i32 0, i32 3
  %19 = load ptr, ptr %18, align 16
  %20 = getelementptr i8, ptr %19, i32 %15
  %21 = add i32 %15, 8
  store i32 %21, ptr %14, align 16
  br label %26

22:                                               ; preds = %12
  %23 = getelementptr inbounds %struct.__va_list_tag, ptr %13, i32 0, i32 2
  %24 = load ptr, ptr %23, align 8
  %25 = getelementptr i8, ptr %24, i32 8
  store ptr %25, ptr %23, align 8
  br label %26

26:                                               ; preds = %22, %17
  %27 = phi ptr [ %20, %17 ], [ %24, %22 ]
  %28 = load ptr, ptr %27, align 8, !tbaa !9
  store ptr %28, ptr %6, align 8, !tbaa !9
  %29 = load ptr, ptr %3, align 8, !tbaa !9
  %30 = load ptr, ptr %6, align 8, !tbaa !9
  %31 = call ptr @CORD_cat(ptr noundef %29, ptr noundef %30)
  store ptr %31, ptr %3, align 8, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #4
  br label %32

32:                                               ; preds = %26
  %33 = load i32, ptr %5, align 4, !tbaa !5
  %34 = add nsw i32 %33, 1
  store i32 %34, ptr %5, align 4, !tbaa !5
  br label %8, !llvm.loop !11

35:                                               ; preds = %8
  %36 = getelementptr inbounds [1 x %struct.__va_list_tag], ptr %4, i64 0, i64 0
  call void @llvm.va_end.p0(ptr %36)
  %37 = load ptr, ptr %3, align 8, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #4
  call void @llvm.lifetime.end.p0(i64 24, ptr %4) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #4
  ret ptr %37
}

; Function Attrs: nocallback nofree nosync nounwind willreturn
declare void @llvm.va_start.p0(ptr) #3

; Function Attrs: nocallback nofree nosync nounwind willreturn
declare void @llvm.va_end.p0(ptr) #3

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { "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 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 = { nocallback nofree nosync nounwind willreturn }
attributes #4 = { 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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"any pointer", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"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.__va_list_tag = type { i32, i32, ptr, ptr }

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

declare ptr @CORD_cat(ptr noundef, ptr noundef) local_unnamed_addr #1

; Function Attrs: mustprogress 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 ptr @CORD_catn(i32 noundef %0, ...) local_unnamed_addr #2 {
  %2 = alloca [1 x %struct.__va_list_tag], align 16
  call void @llvm.lifetime.start.p0(i64 24, ptr nonnull %2) #4
  call void @llvm.va_start.p0(ptr nonnull %2)
  %3 = icmp sgt i32 %0, 0
  br i1 %3, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %1
  %4 = getelementptr inbounds i8, ptr %2, i64 8
  %5 = getelementptr inbounds i8, ptr %2, i64 16
  br label %6

6:                                                ; preds = %.lr.ph, %17
  %.08 = phi ptr [ null, %.lr.ph ], [ %20, %17 ]
  %.057 = phi i32 [ 0, %.lr.ph ], [ %21, %17 ]
  %7 = load i32, ptr %2, align 16
  %8 = icmp ult i32 %7, 41
  br i1 %8, label %9, label %14

9:                                                ; preds = %6
  %10 = load ptr, ptr %5, align 16
  %11 = zext nneg i32 %7 to i64
  %12 = getelementptr i8, ptr %10, i64 %11
  %13 = add nuw nsw i32 %7, 8
  store i32 %13, ptr %2, align 16
  br label %17

14:                                               ; preds = %6
  %15 = load ptr, ptr %4, align 8
  %16 = getelementptr i8, ptr %15, i64 8
  store ptr %16, ptr %4, align 8
  br label %17

17:                                               ; preds = %14, %9
  %18 = phi ptr [ %12, %9 ], [ %15, %14 ]
  %19 = load ptr, ptr %18, align 8, !tbaa !5
  %20 = call ptr @CORD_cat(ptr noundef %.08, ptr noundef %19) #4
  %21 = add nuw nsw i32 %.057, 1
  %exitcond.not = icmp eq i32 %21, %0
  br i1 %exitcond.not, label %._crit_edge, label %6, !llvm.loop !9

._crit_edge:                                      ; preds = %17, %1
  %.0.lcssa = phi ptr [ null, %1 ], [ %20, %17 ]
  call void @llvm.va_end.p0(ptr nonnull %2)
  call void @llvm.lifetime.end.p0(i64 24, ptr nonnull %2) #4
  ret ptr %.0.lcssa
}

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn
declare void @llvm.va_start.p0(ptr) #3

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn
declare void @llvm.va_end.p0(ptr) #3

attributes #0 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { "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 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 = { mustprogress nocallback nofree nosync nounwind willreturn }
attributes #4 = { 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 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}


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