; LLVM IR from catid/Zpng :: zstd (zstd_decompress)

; 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"

; 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: nounwind uwtable
define dso_local i64 @ZSTD_decodingBufferSize_min(i64 noundef %0, i64 noundef %1) #1 {
  %3 = alloca i64, align 8
  %4 = alloca i64, align 8
  %5 = alloca i64, align 8
  %6 = alloca i64, align 8
  %7 = alloca i64, align 8
  %8 = alloca i64, align 8
  %9 = alloca i64, align 8
  %10 = alloca i32, align 4
  store i64 %0, ptr %4, align 8, !tbaa !5
  store i64 %1, ptr %5, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #2
  %11 = load i64, ptr %4, align 8, !tbaa !5
  %12 = icmp ult i64 %11, 131072
  br i1 %12, label %13, label %15

13:                                               ; preds = %2
  %14 = load i64, ptr %4, align 8, !tbaa !5
  br label %16

15:                                               ; preds = %2
  br label %16

16:                                               ; preds = %15, %13
  %17 = phi i64 [ %14, %13 ], [ 131072, %15 ]
  store i64 %17, ptr %6, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #2
  %18 = load i64, ptr %4, align 8, !tbaa !5
  %19 = load i64, ptr %6, align 8, !tbaa !9
  %20 = add i64 %18, %19
  %21 = add i64 %20, 16
  store i64 %21, ptr %7, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #2
  %22 = load i64, ptr %5, align 8, !tbaa !5
  %23 = load i64, ptr %7, align 8, !tbaa !5
  %24 = icmp ult i64 %22, %23
  br i1 %24, label %25, label %27

25:                                               ; preds = %16
  %26 = load i64, ptr %5, align 8, !tbaa !5
  br label %29

27:                                               ; preds = %16
  %28 = load i64, ptr %7, align 8, !tbaa !5
  br label %29

29:                                               ; preds = %27, %25
  %30 = phi i64 [ %26, %25 ], [ %28, %27 ]
  store i64 %30, ptr %8, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %9) #2
  %31 = load i64, ptr %8, align 8, !tbaa !5
  store i64 %31, ptr %9, align 8, !tbaa !9
  %32 = load i64, ptr %9, align 8, !tbaa !9
  %33 = load i64, ptr %8, align 8, !tbaa !5
  %34 = icmp ne i64 %32, %33
  br i1 %34, label %35, label %36

35:                                               ; preds = %29
  store i64 -16, ptr %3, align 8
  store i32 1, ptr %10, align 4
  br label %38

36:                                               ; preds = %29
  %37 = load i64, ptr %9, align 8, !tbaa !9
  store i64 %37, ptr %3, align 8
  store i32 1, ptr %10, align 4
  br label %38

38:                                               ; preds = %36, %35
  call void @llvm.lifetime.end.p0(i64 8, ptr %9) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #2
  %39 = load i64, ptr %3, align 8
  ret i64 %39
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #2 = { 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 = !{!"long long", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"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"

; Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(none) uwtable
define dso_local noundef i64 @ZSTD_decodingBufferSize_min(i64 noundef %0, i64 noundef %1) local_unnamed_addr #0 {
  %3 = tail call i64 @llvm.umin.i64(i64 %0, i64 131072)
  %4 = add i64 %0, 16
  %5 = add i64 %4, %3
  %6 = tail call i64 @llvm.umin.i64(i64 %5, i64 %1)
  ret i64 %6
}

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i64 @llvm.umin.i64(i64, i64) #1

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(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" }
attributes #1 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }

!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: EarlyCSEPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass