; LLVM IR from 0intro/wmii :: lib/libfmt (vsnprint)

; 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.Fmt = type { i8, ptr, ptr, ptr, ptr, ptr, i32, [1 x %struct.__va_list_tag], i32, i32, i32, i64, ptr, ptr, ptr }
%struct.__va_list_tag = type { i32, i32, ptr, ptr }

; Function Attrs: nounwind uwtable
define dso_local i32 @vsnprint(ptr noundef %0, i32 noundef %1, ptr noundef %2, ptr noundef %3) #0 {
  %5 = alloca i32, align 4
  %6 = alloca ptr, align 8
  %7 = alloca i32, align 4
  %8 = alloca ptr, align 8
  %9 = alloca ptr, align 8
  %10 = alloca %struct.Fmt, align 8
  %11 = alloca i32, align 4
  store ptr %0, ptr %6, align 8, !tbaa !5
  store i32 %1, ptr %7, align 4, !tbaa !9
  store ptr %2, ptr %8, align 8, !tbaa !5
  store ptr %3, ptr %9, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 128, ptr %10) #4
  %12 = load i32, ptr %7, align 4, !tbaa !9
  %13 = icmp sle i32 %12, 0
  br i1 %13, label %14, label %15

14:                                               ; preds = %4
  store i32 -1, ptr %5, align 4
  store i32 1, ptr %11, align 4
  br label %46

15:                                               ; preds = %4
  %16 = getelementptr inbounds %struct.Fmt, ptr %10, i32 0, i32 0
  store i8 0, ptr %16, align 8, !tbaa !11
  %17 = load ptr, ptr %6, align 8, !tbaa !5
  %18 = getelementptr inbounds %struct.Fmt, ptr %10, i32 0, i32 1
  store ptr %17, ptr %18, align 8, !tbaa !14
  %19 = load ptr, ptr %6, align 8, !tbaa !5
  %20 = getelementptr inbounds %struct.Fmt, ptr %10, i32 0, i32 2
  store ptr %19, ptr %20, align 8, !tbaa !15
  %21 = load ptr, ptr %6, align 8, !tbaa !5
  %22 = load i32, ptr %7, align 4, !tbaa !9
  %23 = sext i32 %22 to i64
  %24 = getelementptr inbounds i8, ptr %21, i64 %23
  %25 = getelementptr inbounds i8, ptr %24, i64 -1
  %26 = getelementptr inbounds %struct.Fmt, ptr %10, i32 0, i32 3
  store ptr %25, ptr %26, align 8, !tbaa !16
  %27 = getelementptr inbounds %struct.Fmt, ptr %10, i32 0, i32 4
  store ptr null, ptr %27, align 8, !tbaa !17
  %28 = getelementptr inbounds %struct.Fmt, ptr %10, i32 0, i32 5
  store ptr null, ptr %28, align 8, !tbaa !18
  %29 = getelementptr inbounds %struct.Fmt, ptr %10, i32 0, i32 6
  store i32 0, ptr %29, align 8, !tbaa !19
  %30 = getelementptr inbounds %struct.Fmt, ptr %10, i32 0, i32 7
  %31 = getelementptr inbounds [1 x %struct.__va_list_tag], ptr %30, i64 0, i64 0
  %32 = load ptr, ptr %9, align 8, !tbaa !5
  call void @llvm.va_copy.p0(ptr %31, ptr %32)
  call void @fmtlocaleinit(ptr noundef %10, ptr noundef null, ptr noundef null, ptr noundef null)
  %33 = load ptr, ptr %8, align 8, !tbaa !5
  %34 = call i32 @dofmt(ptr noundef %10, ptr noundef %33)
  %35 = getelementptr inbounds %struct.Fmt, ptr %10, i32 0, i32 7
  %36 = getelementptr inbounds [1 x %struct.__va_list_tag], ptr %35, i64 0, i64 0
  call void @llvm.va_end.p0(ptr %36)
  %37 = getelementptr inbounds %struct.Fmt, ptr %10, i32 0, i32 2
  %38 = load ptr, ptr %37, align 8, !tbaa !15
  store i8 0, ptr %38, align 1, !tbaa !20
  %39 = getelementptr inbounds %struct.Fmt, ptr %10, i32 0, i32 2
  %40 = load ptr, ptr %39, align 8, !tbaa !15
  %41 = load ptr, ptr %6, align 8, !tbaa !5
  %42 = ptrtoint ptr %40 to i64
  %43 = ptrtoint ptr %41 to i64
  %44 = sub i64 %42, %43
  %45 = trunc i64 %44 to i32
  store i32 %45, ptr %5, align 4
  store i32 1, ptr %11, align 4
  br label %46

46:                                               ; preds = %15, %14
  call void @llvm.lifetime.end.p0(i64 128, ptr %10) #4
  %47 = load i32, ptr %5, align 4
  ret i32 %47
}

; 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
declare void @llvm.va_copy.p0(ptr, ptr) #2

declare void @fmtlocaleinit(ptr noundef, ptr noundef, ptr noundef, ptr noundef) #3

declare i32 @dofmt(ptr noundef, ptr noundef) #3

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

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

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" }
attributes #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { nocallback nofree nosync nounwind willreturn }
attributes #3 = { "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/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = !{!12, !7, i64 0}
!12 = !{!"Fmt", !7, i64 0, !6, i64 8, !6, i64 16, !6, i64 24, !6, i64 32, !6, i64 40, !10, i64 48, !7, i64 56, !10, i64 80, !10, i64 84, !10, i64 88, !13, i64 96, !6, i64 104, !6, i64 112, !6, i64 120}
!13 = !{!"long", !7, i64 0}
!14 = !{!12, !6, i64 8}
!15 = !{!12, !6, i64 16}
!16 = !{!12, !6, i64 24}
!17 = !{!12, !6, i64 32}
!18 = !{!12, !6, i64 40}
!19 = !{!12, !10, i64 48}
!20 = !{!7, !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.Fmt = type { i8, ptr, ptr, ptr, ptr, ptr, i32, [1 x %struct.__va_list_tag], i32, i32, i32, i64, ptr, ptr, ptr }
%struct.__va_list_tag = type { i32, i32, ptr, ptr }

; Function Attrs: nounwind uwtable
define dso_local i32 @vsnprint(ptr noundef %0, i32 noundef %1, ptr noundef %2, ptr noundef %3) local_unnamed_addr #0 {
  %5 = alloca %struct.Fmt, align 8
  call void @llvm.lifetime.start.p0(i64 128, ptr nonnull %5) #5
  %6 = icmp slt i32 %1, 1
  br i1 %6, label %23, label %7

7:                                                ; preds = %4
  store i8 0, ptr %5, align 8, !tbaa !5
  %8 = getelementptr inbounds i8, ptr %5, i64 8
  store ptr %0, ptr %8, align 8, !tbaa !12
  %9 = getelementptr inbounds i8, ptr %5, i64 16
  store ptr %0, ptr %9, align 8, !tbaa !13
  %10 = zext nneg i32 %1 to i64
  %11 = getelementptr inbounds i8, ptr %0, i64 %10
  %12 = getelementptr inbounds i8, ptr %11, i64 -1
  %13 = getelementptr inbounds i8, ptr %5, i64 24
  store ptr %12, ptr %13, align 8, !tbaa !14
  %14 = getelementptr inbounds i8, ptr %5, i64 32
  %15 = getelementptr inbounds i8, ptr %5, i64 56
  call void @llvm.memset.p0.i64(ptr noundef nonnull align 8 dereferenceable(20) %14, i8 0, i64 20, i1 false)
  call void @llvm.va_copy.p0(ptr nonnull %15, ptr %3)
  call void @fmtlocaleinit(ptr noundef nonnull %5, ptr noundef null, ptr noundef null, ptr noundef null) #5
  %16 = call i32 @dofmt(ptr noundef nonnull %5, ptr noundef %2) #5
  call void @llvm.va_end.p0(ptr nonnull %15)
  %17 = load ptr, ptr %9, align 8, !tbaa !13
  store i8 0, ptr %17, align 1, !tbaa !15
  %18 = load ptr, ptr %9, align 8, !tbaa !13
  %19 = ptrtoint ptr %18 to i64
  %20 = ptrtoint ptr %0 to i64
  %21 = sub i64 %19, %20
  %22 = trunc i64 %21 to i32
  br label %23

23:                                               ; preds = %4, %7
  %.0 = phi i32 [ %22, %7 ], [ -1, %4 ]
  call void @llvm.lifetime.end.p0(i64 128, ptr nonnull %5) #5
  ret i32 %.0
}

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

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

declare void @fmtlocaleinit(ptr noundef, ptr noundef, ptr noundef, ptr noundef) local_unnamed_addr #3

declare i32 @dofmt(ptr noundef, ptr noundef) local_unnamed_addr #3

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

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #4

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" }
attributes #1 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { mustprogress nocallback nofree nosync nounwind willreturn }
attributes #3 = { "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 = { nocallback nofree nounwind willreturn memory(argmem: write) }
attributes #5 = { 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, !7, i64 0}
!6 = !{!"Fmt", !7, i64 0, !9, i64 8, !9, i64 16, !9, i64 24, !9, i64 32, !9, i64 40, !10, i64 48, !7, i64 56, !10, i64 80, !10, i64 84, !10, i64 88, !11, i64 96, !9, i64 104, !9, i64 112, !9, i64 120}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!"any pointer", !7, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = !{!"long", !7, i64 0}
!12 = !{!6, !9, i64 8}
!13 = !{!6, !9, i64 16}
!14 = !{!6, !9, i64 24}
!15 = !{!7, !7, i64 0}


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