; LLVM IR from golems/ach :: src/achd (io)

; 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
declare dso_local i32 @achd_getc(i32 noundef) #1

; Function Attrs: nounwind uwtable
define dso_local i32 @achd_readline(i32 noundef %0, ptr noundef %1, i64 noundef %2) #1 {
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca ptr, align 8
  %7 = alloca i64, align 8
  %8 = alloca i32, align 4
  %9 = alloca i64, align 8
  %10 = alloca i32, align 4
  store i32 %0, ptr %5, align 4, !tbaa !5
  store ptr %1, ptr %6, align 8, !tbaa !9
  store i64 %2, ptr %7, align 8, !tbaa !11
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #2
  call void @llvm.lifetime.start.p0(i64 8, ptr %9) #2
  store i64 0, ptr %9, align 8, !tbaa !11
  br label %11

11:                                               ; preds = %32, %3
  %12 = load i64, ptr %9, align 8, !tbaa !11
  %13 = load i64, ptr %7, align 8, !tbaa !11
  %14 = icmp ult i64 %12, %13
  br i1 %14, label %15, label %33

15:                                               ; preds = %11
  %16 = load i32, ptr %5, align 4, !tbaa !5
  %17 = call i32 @achd_getc(i32 noundef %16)
  store i32 %17, ptr %8, align 4, !tbaa !5
  %18 = load i32, ptr %8, align 4, !tbaa !5
  switch i32 %18, label %25 [
    i32 10, label %19
    i32 13, label %32
    i32 -1, label %24
  ]

19:                                               ; preds = %15
  %20 = load ptr, ptr %6, align 8, !tbaa !9
  %21 = load i64, ptr %9, align 8, !tbaa !11
  %22 = add i64 %21, 1
  store i64 %22, ptr %9, align 8, !tbaa !11
  %23 = getelementptr inbounds i8, ptr %20, i64 %21
  store i8 0, ptr %23, align 1, !tbaa !13
  store i32 0, ptr %4, align 4
  store i32 1, ptr %10, align 4
  br label %34

24:                                               ; preds = %15
  store i32 4, ptr %4, align 4
  store i32 1, ptr %10, align 4
  br label %34

25:                                               ; preds = %15
  %26 = load i32, ptr %8, align 4, !tbaa !5
  %27 = trunc i32 %26 to i8
  %28 = load ptr, ptr %6, align 8, !tbaa !9
  %29 = load i64, ptr %9, align 8, !tbaa !11
  %30 = add i64 %29, 1
  store i64 %30, ptr %9, align 8, !tbaa !11
  %31 = getelementptr inbounds i8, ptr %28, i64 %29
  store i8 %27, ptr %31, align 1, !tbaa !13
  br label %32

32:                                               ; preds = %25, %15
  br label %11, !llvm.loop !14

33:                                               ; preds = %11
  store i32 1, ptr %4, align 4
  store i32 1, ptr %10, align 4
  br label %34

34:                                               ; preds = %33, %24, %19
  call void @llvm.lifetime.end.p0(i64 8, ptr %9) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #2
  %35 = load i32, ptr %4, align 4
  ret i32 %35
}

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 = !{!"any pointer", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"long", !7, i64 0}
!13 = !{!7, !7, i64 0}
!14 = distinct !{!14, !15}
!15 = !{!"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
declare dso_local i32 @achd_getc(i32 noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local range(i32 0, 5) i32 @achd_readline(i32 noundef %0, ptr nocapture noundef writeonly %1, i64 noundef %2) local_unnamed_addr #0 {
  %.not = icmp eq i64 %2, 0
  br i1 %.not, label %.loopexit, label %.lr.ph

.lr.ph:                                           ; preds = %3, %11
  %.011 = phi i64 [ %.1, %11 ], [ 0, %3 ]
  %4 = tail call i32 @achd_getc(i32 noundef %0)
  switch i32 %4, label %7 [
    i32 10, label %5
    i32 13, label %11
    i32 -1, label %.loopexit
  ]

5:                                                ; preds = %.lr.ph
  %6 = getelementptr inbounds i8, ptr %1, i64 %.011
  store i8 0, ptr %6, align 1, !tbaa !5
  br label %.loopexit

7:                                                ; preds = %.lr.ph
  %8 = trunc i32 %4 to i8
  %9 = add nuw i64 %.011, 1
  %10 = getelementptr inbounds i8, ptr %1, i64 %.011
  store i8 %8, ptr %10, align 1, !tbaa !5
  br label %11

11:                                               ; preds = %7, %.lr.ph
  %.1 = phi i64 [ %9, %7 ], [ %.011, %.lr.ph ]
  %12 = icmp ult i64 %.1, %2
  br i1 %12, label %.lr.ph, label %.loopexit, !llvm.loop !8

.loopexit:                                        ; preds = %.lr.ph, %11, %3, %5
  %.09 = phi i32 [ 0, %5 ], [ 1, %3 ], [ 4, %.lr.ph ], [ 1, %11 ]
  ret i32 %.09
}

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" }

!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"}
!8 = distinct !{!8, !9}
!9 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: CorrelatedValuePropagationPass,EarlyCSEPass,GVNPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass