; LLVM IR from 0intro/wmii :: lib/libutf (rune)

; 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 i32 @fullrune(ptr noundef %0, i32 noundef %1) #1 {
  %3 = alloca i32, align 4
  %4 = alloca ptr, align 8
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store i32 %1, ptr %5, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #2
  %8 = load i32, ptr %5, align 4, !tbaa !9
  %9 = icmp sle i32 %8, 0
  br i1 %9, label %10, label %11

10:                                               ; preds = %2
  store i32 0, ptr %3, align 4
  store i32 1, ptr %7, align 4
  br label %36

11:                                               ; preds = %2
  %12 = load ptr, ptr %4, align 8, !tbaa !5
  %13 = load i8, ptr %12, align 1, !tbaa !11
  %14 = zext i8 %13 to i32
  store i32 %14, ptr %6, align 4, !tbaa !9
  %15 = load i32, ptr %6, align 4, !tbaa !9
  %16 = icmp slt i32 %15, 128
  br i1 %16, label %17, label %18

17:                                               ; preds = %11
  store i32 1, ptr %3, align 4
  store i32 1, ptr %7, align 4
  br label %36

18:                                               ; preds = %11
  %19 = load i32, ptr %6, align 4, !tbaa !9
  %20 = icmp slt i32 %19, 224
  br i1 %20, label %21, label %25

21:                                               ; preds = %18
  %22 = load i32, ptr %5, align 4, !tbaa !9
  %23 = icmp sge i32 %22, 2
  %24 = zext i1 %23 to i32
  store i32 %24, ptr %3, align 4
  store i32 1, ptr %7, align 4
  br label %36

25:                                               ; preds = %18
  %26 = load i32, ptr %6, align 4, !tbaa !9
  %27 = icmp slt i32 %26, 240
  br i1 %27, label %28, label %32

28:                                               ; preds = %25
  %29 = load i32, ptr %5, align 4, !tbaa !9
  %30 = icmp sge i32 %29, 3
  %31 = zext i1 %30 to i32
  store i32 %31, ptr %3, align 4
  store i32 1, ptr %7, align 4
  br label %36

32:                                               ; preds = %25
  %33 = load i32, ptr %5, align 4, !tbaa !9
  %34 = icmp sge i32 %33, 4
  %35 = zext i1 %34 to i32
  store i32 %35, ptr %3, align 4
  store i32 1, ptr %7, align 4
  br label %36

36:                                               ; preds = %32, %28, %21, %17, %10
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #2
  %37 = load i32, ptr %3, align 4
  ret i32 %37
}

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 = !{!"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 = !{!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"

; Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(argmem: read) uwtable
define dso_local range(i32 0, 2) i32 @fullrune(ptr nocapture noundef readonly %0, i32 noundef %1) local_unnamed_addr #0 {
  %3 = icmp slt i32 %1, 1
  br i1 %3, label %17, label %4

4:                                                ; preds = %2
  %5 = load i8, ptr %0, align 1, !tbaa !5
  %6 = icmp sgt i8 %5, -1
  br i1 %6, label %17, label %7

7:                                                ; preds = %4
  %8 = icmp ult i8 %5, -32
  br i1 %8, label %9, label %11

9:                                                ; preds = %7
  %10 = icmp ne i32 %1, 1
  br label %17

11:                                               ; preds = %7
  %12 = icmp ult i8 %5, -16
  br i1 %12, label %13, label %15

13:                                               ; preds = %11
  %14 = icmp ugt i32 %1, 2
  br label %17

15:                                               ; preds = %11
  %16 = icmp ugt i32 %1, 3
  br label %17

17:                                               ; preds = %4, %2, %15, %13, %9
  %.0.shrunk = phi i1 [ %10, %9 ], [ %14, %13 ], [ %16, %15 ], [ false, %2 ], [ true, %4 ]
  %.0 = zext i1 %.0.shrunk to i32
  ret i32 %.0
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(argmem: read) 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 = !{!"omnipotent char", !7, i64 0}
!7 = !{!"Simple C/C++ TBAA"}


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