; LLVM IR from dholzmueller/sfcpp :: src/strings/strings.ll (ZN5sfcpp7strings8getDigitEc)

; 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: mustprogress nounwind uwtable
define dso_local noundef i32 @_ZN5sfcpp7strings8getDigitEc(i8 noundef signext %0) #1 {
  %2 = alloca i32, align 4
  %3 = alloca i8, align 1
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  store i8 %0, ptr %3, align 1, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #2
  %6 = load i8, ptr %3, align 1, !tbaa !5
  %7 = sext i8 %6 to i32
  %8 = sub nsw i32 %7, 48
  store i32 %8, ptr %4, align 4, !tbaa !8
  %9 = load i32, ptr %4, align 4, !tbaa !8
  %10 = icmp slt i32 %9, 0
  br i1 %10, label %14, label %11

11:                                               ; preds = %1
  %12 = load i32, ptr %4, align 4, !tbaa !8
  %13 = icmp sgt i32 %12, 9
  br i1 %13, label %14, label %15

14:                                               ; preds = %11, %1
  store i32 -1, ptr %2, align 4
  store i32 1, ptr %5, align 4
  br label %17

15:                                               ; preds = %11
  %16 = load i32, ptr %4, align 4, !tbaa !8
  store i32 %16, ptr %2, align 4
  store i32 1, ptr %5, align 4
  br label %17

17:                                               ; preds = %15, %14
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #2
  %18 = load i32, ptr %2, align 4
  ret i32 %18
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { mustprogress 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 = !{!"omnipotent char", !7, i64 0}
!7 = !{!"Simple C++ TBAA"}
!8 = !{!9, !9, i64 0}
!9 = !{!"int", !6, 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 range(i32 -1, 10) i32 @_ZN5sfcpp7strings8getDigitEc(i8 noundef signext %0) local_unnamed_addr #0 {
  %2 = add i8 %0, -58
  %or.cond = icmp ult i8 %2, -10
  %3 = zext nneg i8 %0 to i32
  %4 = add nsw i32 %3, -48
  %.0 = select i1 %or.cond, i32 -1, i32 %4
  ret i32 %.0
}

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" }

!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: CorrelatedValuePropagationPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass