; LLVM IR from ybubnov/libhuffman :: src (errors)

; 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"

@__huf_error_map = external hidden global [8 x ptr], align 16

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

8:                                                ; preds = %1
  %9 = load i32, ptr %3, align 4, !tbaa !5
  %10 = zext i32 %9 to i64
  %11 = load i64, ptr %4, align 8, !tbaa !9
  %12 = icmp uge i64 %10, %11
  br i1 %12, label %13, label %18

13:                                               ; preds = %8, %1
  %14 = load i64, ptr %4, align 8, !tbaa !9
  %15 = sub i64 %14, 1
  %16 = getelementptr inbounds [8 x ptr], ptr @__huf_error_map, i64 0, i64 %15
  %17 = load ptr, ptr %16, align 8, !tbaa !11
  store ptr %17, ptr %2, align 8
  store i32 1, ptr %5, align 4
  br label %23

18:                                               ; preds = %8
  %19 = load i32, ptr %3, align 4, !tbaa !5
  %20 = zext i32 %19 to i64
  %21 = getelementptr inbounds [8 x ptr], ptr @__huf_error_map, i64 0, i64 %20
  %22 = load ptr, ptr %21, align 8, !tbaa !11
  store ptr %22, ptr %2, align 8
  store i32 1, ptr %5, align 4
  br label %23

23:                                               ; preds = %18, %13
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #2
  %24 = load ptr, ptr %2, align 8
  ret ptr %24
}

; 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 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 = { 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 = !{!12, !12, i64 0}
!12 = !{!"any pointer", !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"

@__huf_error_map = external hidden local_unnamed_addr global [8 x ptr], align 16

; Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(read, inaccessiblemem: none) uwtable
define dso_local ptr @huf_error_string(i32 noundef %0) local_unnamed_addr #0 {
  %2 = icmp ugt i32 %0, 7
  %3 = zext nneg i32 %0 to i64
  %4 = getelementptr inbounds [8 x ptr], ptr @__huf_error_map, i64 0, i64 %3
  %.0.in = select i1 %2, ptr getelementptr inbounds (i8, ptr @__huf_error_map, i64 56), ptr %4
  %.0 = load ptr, ptr %.0.in, align 8, !tbaa !5
  ret ptr %.0
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(read, inaccessiblemem: 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" }

!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"}


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