; LLVM IR from facebook/redex :: libresource/String8.ll/ZN7android7String813appendFormatVEPKcP13 (va_list_tag)

; 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

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

; Function Attrs: mustprogress uwtable
declare dso_local noundef i64 @_ZNK7android7String86lengthEv(ptr noundef nonnull align 8 dereferenceable(8)) #1 align 2

; Function Attrs: nocallback nofree nosync nounwind willreturn
declare void @llvm.va_end.p0(ptr) #2

; Function Attrs: mustprogress uwtable
define dso_local noundef i32 @_ZN7android7String813appendFormatVEPKcP13__va_list_tag(ptr noundef nonnull align 8 dereferenceable(8) %0, ptr noundef %1, ptr noundef %2) #1 align 2 {
  %4 = alloca i32, align 4
  %5 = alloca ptr, align 8
  %6 = alloca ptr, align 8
  %7 = alloca ptr, align 8
  %8 = alloca i32, align 4
  %9 = alloca i32, align 4
  %10 = alloca [1 x %struct.__va_list_tag], align 16
  %11 = alloca i32, align 4
  %12 = alloca i64, align 8
  %13 = alloca ptr, align 8
  store ptr %0, ptr %5, align 8, !tbaa !5
  store ptr %1, ptr %6, align 8, !tbaa !5
  store ptr %2, ptr %7, align 8, !tbaa !5
  %14 = load ptr, ptr %5, align 8
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #4
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #4
  store i32 0, ptr %9, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 24, ptr %10) #4
  %15 = getelementptr inbounds [1 x %struct.__va_list_tag], ptr %10, i64 0, i64 0
  %16 = load ptr, ptr %7, align 8, !tbaa !5
  call void @llvm.va_copy.p0(ptr %15, ptr %16)
  %17 = load ptr, ptr %6, align 8, !tbaa !5
  %18 = getelementptr inbounds [1 x %struct.__va_list_tag], ptr %10, i64 0, i64 0
  %19 = call i32 @vsnprintf(ptr noundef null, i64 noundef 0, ptr noundef %17, ptr noundef %18) #4
  store i32 %19, ptr %8, align 4, !tbaa !9
  %20 = getelementptr inbounds [1 x %struct.__va_list_tag], ptr %10, i64 0, i64 0
  call void @llvm.va_end.p0(ptr %20)
  %21 = load i32, ptr %8, align 4, !tbaa !9
  %22 = icmp slt i32 %21, 0
  br i1 %22, label %23, label %24

23:                                               ; preds = %3
  store i32 -2147483648, ptr %4, align 4
  store i32 1, ptr %11, align 4
  br label %65

24:                                               ; preds = %3
  %25 = load i32, ptr %8, align 4, !tbaa !9
  %26 = icmp sgt i32 %25, 0
  br i1 %26, label %27, label %63

27:                                               ; preds = %24
  call void @llvm.lifetime.start.p0(i64 8, ptr %12) #4
  %28 = call noundef i64 @_ZNK7android7String86lengthEv(ptr noundef nonnull align 8 dereferenceable(8) %14)
  store i64 %28, ptr %12, align 8, !tbaa !11
  %29 = load i32, ptr %8, align 4, !tbaa !9
  %30 = sext i32 %29 to i64
  %31 = icmp ugt i64 %30, -2
  br i1 %31, label %39, label %32

32:                                               ; preds = %27
  %33 = load i64, ptr %12, align 8, !tbaa !11
  %34 = load i32, ptr %8, align 4, !tbaa !9
  %35 = sext i32 %34 to i64
  %36 = sub i64 -1, %35
  %37 = sub i64 %36, 1
  %38 = icmp ugt i64 %33, %37
  br i1 %38, label %39, label %40

39:                                               ; preds = %32, %27
  store i32 -12, ptr %4, align 4
  store i32 1, ptr %11, align 4
  br label %60

40:                                               ; preds = %32
  call void @llvm.lifetime.start.p0(i64 8, ptr %13) #4
  %41 = load i64, ptr %12, align 8, !tbaa !11
  %42 = load i32, ptr %8, align 4, !tbaa !9
  %43 = sext i32 %42 to i64
  %44 = add i64 %41, %43
  %45 = call noundef ptr @_ZN7android7String810lockBufferEm(ptr noundef nonnull align 8 dereferenceable(8) %14, i64 noundef %44)
  store ptr %45, ptr %13, align 8, !tbaa !5
  %46 = load ptr, ptr %13, align 8, !tbaa !5
  %47 = icmp ne ptr %46, null
  br i1 %47, label %48, label %58

48:                                               ; preds = %40
  %49 = load ptr, ptr %13, align 8, !tbaa !5
  %50 = load i64, ptr %12, align 8, !tbaa !11
  %51 = getelementptr inbounds i8, ptr %49, i64 %50
  %52 = load i32, ptr %8, align 4, !tbaa !9
  %53 = add nsw i32 %52, 1
  %54 = sext i32 %53 to i64
  %55 = load ptr, ptr %6, align 8, !tbaa !5
  %56 = load ptr, ptr %7, align 8, !tbaa !5
  %57 = call i32 @vsnprintf(ptr noundef %51, i64 noundef %54, ptr noundef %55, ptr noundef %56) #4
  br label %59

58:                                               ; preds = %40
  store i32 -12, ptr %9, align 4, !tbaa !9
  br label %59

59:                                               ; preds = %58, %48
  call void @llvm.lifetime.end.p0(i64 8, ptr %13) #4
  store i32 0, ptr %11, align 4
  br label %60

60:                                               ; preds = %59, %39
  call void @llvm.lifetime.end.p0(i64 8, ptr %12) #4
  %61 = load i32, ptr %11, align 4
  switch i32 %61, label %65 [
    i32 0, label %62
  ]

62:                                               ; preds = %60
  br label %63

63:                                               ; preds = %62, %24
  %64 = load i32, ptr %9, align 4, !tbaa !9
  store i32 %64, ptr %4, align 4
  store i32 1, ptr %11, align 4
  br label %65

65:                                               ; preds = %63, %60, %23
  call void @llvm.lifetime.end.p0(i64 24, ptr %10) #4
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #4
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #4
  %66 = load i32, ptr %4, align 4
  ret i32 %66
}

; Function Attrs: nocallback nofree nosync nounwind willreturn
declare void @llvm.va_copy.p0(ptr, ptr) #2

; Function Attrs: nounwind
declare i32 @vsnprintf(ptr noundef, i64 noundef, ptr noundef, ptr noundef) #3

; Function Attrs: mustprogress uwtable
declare dso_local noundef ptr @_ZN7android7String810lockBufferEm(ptr noundef nonnull align 8 dereferenceable(8), i64 noundef) #1 align 2

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { mustprogress 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 = { nocallback nofree nosync nounwind willreturn }
attributes #3 = { nounwind "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 #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++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"long", !7, i64 0}


; 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

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

; Function Attrs: mustprogress uwtable
declare dso_local noundef i64 @_ZNK7android7String86lengthEv(ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #1 align 2

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn
declare void @llvm.va_end.p0(ptr) #2

; Function Attrs: mustprogress uwtable
define dso_local noundef range(i32 -2147483648, 1) i32 @_ZN7android7String813appendFormatVEPKcP13__va_list_tag(ptr noundef nonnull align 8 dereferenceable(8) %0, ptr nocapture noundef readonly %1, ptr noundef %2) local_unnamed_addr #1 align 2 {
  %4 = alloca [1 x %struct.__va_list_tag], align 16
  call void @llvm.lifetime.start.p0(i64 24, ptr nonnull %4) #4
  call void @llvm.va_copy.p0(ptr nonnull %4, ptr %2)
  %5 = call i32 @vsnprintf(ptr noundef null, i64 noundef 0, ptr noundef %1, ptr noundef nonnull %4) #4
  call void @llvm.va_end.p0(ptr nonnull %4)
  %6 = icmp slt i32 %5, 0
  br i1 %6, label %20, label %7

7:                                                ; preds = %3
  %.not = icmp eq i32 %5, 0
  br i1 %.not, label %20, label %8

8:                                                ; preds = %7
  %9 = call noundef i64 @_ZNK7android7String86lengthEv(ptr noundef nonnull align 8 dereferenceable(8) %0)
  %10 = zext nneg i32 %5 to i64
  %11 = sub nuw nsw i64 -2, %10
  %.not24 = icmp ugt i64 %9, %11
  br i1 %.not24, label %20, label %12

12:                                               ; preds = %8
  %13 = add i64 %9, %10
  %14 = call noundef ptr @_ZN7android7String810lockBufferEm(ptr noundef nonnull align 8 dereferenceable(8) %0, i64 noundef %13)
  %.not23 = icmp eq ptr %14, null
  br i1 %.not23, label %20, label %15

15:                                               ; preds = %12
  %16 = getelementptr inbounds i8, ptr %14, i64 %9
  %17 = add nuw nsw i32 %5, 1
  %18 = zext nneg i32 %17 to i64
  %19 = call i32 @vsnprintf(ptr noundef nonnull %16, i64 noundef %18, ptr noundef %1, ptr noundef %2) #4
  br label %20

20:                                               ; preds = %8, %12, %15, %7, %3
  %.1 = phi i32 [ -2147483648, %3 ], [ 0, %7 ], [ -12, %8 ], [ 0, %15 ], [ -12, %12 ]
  call void @llvm.lifetime.end.p0(i64 24, ptr nonnull %4) #4
  ret i32 %.1
}

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn
declare void @llvm.va_copy.p0(ptr, ptr) #2

; Function Attrs: nofree nounwind
declare noundef i32 @vsnprintf(ptr nocapture noundef, i64 noundef, ptr nocapture noundef readonly, ptr noundef) local_unnamed_addr #3

; Function Attrs: mustprogress uwtable
declare dso_local noundef ptr @_ZN7android7String810lockBufferEm(ptr noundef nonnull align 8 dereferenceable(8), i64 noundef) local_unnamed_addr #1 align 2

attributes #0 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { mustprogress 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 = { mustprogress nocallback nofree nosync nounwind willreturn }
attributes #3 = { nofree nounwind "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 #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)"}


; Effective O3 passes: CorrelatedValuePropagationPass,EarlyCSEPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass