; LLVM IR from indygreg/python-zstandard :: zstd (zstd)

; 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_estimateCCtxSize(i32 noundef %0) #1 {
  %2 = alloca i32, align 4
  %3 = alloca i32, align 4
  %4 = alloca i64, align 8
  %5 = alloca i64, align 8
  store i32 %0, ptr %2, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #2
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #2
  store i64 0, ptr %4, align 8, !tbaa !9
  %6 = load i32, ptr %2, align 4, !tbaa !5
  %7 = icmp slt i32 %6, 1
  br i1 %7, label %8, label %10

8:                                                ; preds = %1
  %9 = load i32, ptr %2, align 4, !tbaa !5
  br label %11

10:                                               ; preds = %1
  br label %11

11:                                               ; preds = %10, %8
  %12 = phi i32 [ %9, %8 ], [ 1, %10 ]
  store i32 %12, ptr %3, align 4, !tbaa !5
  br label %13

13:                                               ; preds = %26, %11
  %14 = load i32, ptr %3, align 4, !tbaa !5
  %15 = load i32, ptr %2, align 4, !tbaa !5
  %16 = icmp sle i32 %14, %15
  br i1 %16, label %17, label %29

17:                                               ; preds = %13
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #2
  %18 = load i32, ptr %3, align 4, !tbaa !5
  %19 = call i64 @ZSTD_estimateCCtxSize_internal(i32 noundef %18)
  store i64 %19, ptr %5, align 8, !tbaa !9
  %20 = load i64, ptr %5, align 8, !tbaa !9
  %21 = load i64, ptr %4, align 8, !tbaa !9
  %22 = icmp ugt i64 %20, %21
  br i1 %22, label %23, label %25

23:                                               ; preds = %17
  %24 = load i64, ptr %5, align 8, !tbaa !9
  store i64 %24, ptr %4, align 8, !tbaa !9
  br label %25

25:                                               ; preds = %23, %17
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #2
  br label %26

26:                                               ; preds = %25
  %27 = load i32, ptr %3, align 4, !tbaa !5
  %28 = add nsw i32 %27, 1
  store i32 %28, ptr %3, align 4, !tbaa !5
  br label %13, !llvm.loop !11

29:                                               ; preds = %13
  %30 = load i64, ptr %4, align 8, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #2
  ret i64 %30
}

; Function Attrs: nounwind uwtable
declare hidden i64 @ZSTD_estimateCCtxSize_internal(i32 noundef) #1

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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"long", !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"

; Function Attrs: nounwind uwtable
define dso_local i64 @ZSTD_estimateCCtxSize(i32 noundef %0) local_unnamed_addr #0 {
  %2 = tail call i32 @llvm.smin.i32(i32 %0, i32 1)
  br label %3

3:                                                ; preds = %1, %3
  %.013 = phi i32 [ %2, %1 ], [ %5, %3 ]
  %.01012 = phi i64 [ 0, %1 ], [ %spec.select, %3 ]
  %4 = tail call i64 @ZSTD_estimateCCtxSize_internal(i32 noundef %.013)
  %spec.select = tail call i64 @llvm.umax.i64(i64 %4, i64 %.01012)
  %5 = add i32 %.013, 1
  %exitcond.not = icmp eq i32 %.013, %0
  br i1 %exitcond.not, label %6, label %3, !llvm.loop !5

6:                                                ; preds = %3
  ret i64 %spec.select
}

; Function Attrs: nounwind uwtable
declare hidden i64 @ZSTD_estimateCCtxSize_internal(i32 noundef) local_unnamed_addr #0

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i32 @llvm.smin.i32(i32, i32) #1

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i64 @llvm.umax.i64(i64, i64) #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 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)"}
!5 = distinct !{!5, !6}
!6 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: GVNPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,LCSSAPass,LoopRotatePass,LoopUnrollPass,SROAPass,SimplifyCFGPass,TailCallElimPass