; LLVM IR from freakout42/macrocalc :: arx/src (str_tlen)

; 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: nounwind uwtable
define dso_local i32 @str_tlen(ptr noundef %0) #0 {
  %2 = alloca i32, align 4
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #4
  %6 = load ptr, ptr %3, align 8, !tbaa !5
  %7 = call ptr @strchr(ptr noundef %6, i32 noundef 0) #5
  store ptr %7, ptr %4, align 8, !tbaa !5
  %8 = icmp eq ptr null, %7
  br i1 %8, label %9, label %10

9:                                                ; preds = %1
  store i32 0, ptr %2, align 4
  store i32 1, ptr %5, align 4
  br label %65

10:                                               ; preds = %1
  br label %11

11:                                               ; preds = %24, %10
  %12 = call ptr @__ctype_b_loc() #6
  %13 = load ptr, ptr %12, align 8, !tbaa !5
  %14 = load ptr, ptr %3, align 8, !tbaa !5
  %15 = load i8, ptr %14, align 1, !tbaa !9
  %16 = sext i8 %15 to i32
  %17 = sext i32 %16 to i64
  %18 = getelementptr inbounds i16, ptr %13, i64 %17
  %19 = load i16, ptr %18, align 2, !tbaa !10
  %20 = zext i16 %19 to i32
  %21 = and i32 %20, 8192
  %22 = icmp ne i32 %21, 0
  br i1 %22, label %23, label %27

23:                                               ; preds = %11
  br label %24

24:                                               ; preds = %23
  %25 = load ptr, ptr %3, align 8, !tbaa !5
  %26 = getelementptr inbounds i8, ptr %25, i32 1
  store ptr %26, ptr %3, align 8, !tbaa !5
  br label %11, !llvm.loop !12

27:                                               ; preds = %11
  %28 = load ptr, ptr %4, align 8, !tbaa !5
  %29 = getelementptr inbounds i8, ptr %28, i32 -1
  store ptr %29, ptr %4, align 8, !tbaa !5
  br label %30

30:                                               ; preds = %54, %27
  %31 = load ptr, ptr %4, align 8, !tbaa !5
  %32 = load ptr, ptr %3, align 8, !tbaa !5
  %33 = icmp ugt ptr %31, %32
  br i1 %33, label %34, label %52

34:                                               ; preds = %30
  %35 = load ptr, ptr %4, align 8, !tbaa !5
  %36 = load i8, ptr %35, align 1, !tbaa !9
  %37 = sext i8 %36 to i32
  %38 = and i32 %37, -128
  %39 = icmp eq i32 %38, 0
  br i1 %39, label %40, label %52

40:                                               ; preds = %34
  %41 = call ptr @__ctype_b_loc() #6
  %42 = load ptr, ptr %41, align 8, !tbaa !5
  %43 = load ptr, ptr %4, align 8, !tbaa !5
  %44 = load i8, ptr %43, align 1, !tbaa !9
  %45 = sext i8 %44 to i32
  %46 = sext i32 %45 to i64
  %47 = getelementptr inbounds i16, ptr %42, i64 %46
  %48 = load i16, ptr %47, align 2, !tbaa !10
  %49 = zext i16 %48 to i32
  %50 = and i32 %49, 8192
  %51 = icmp ne i32 %50, 0
  br label %52

52:                                               ; preds = %40, %34, %30
  %53 = phi i1 [ false, %34 ], [ false, %30 ], [ %51, %40 ]
  br i1 %53, label %54, label %57

54:                                               ; preds = %52
  %55 = load ptr, ptr %4, align 8, !tbaa !5
  %56 = getelementptr inbounds i8, ptr %55, i32 -1
  store ptr %56, ptr %4, align 8, !tbaa !5
  br label %30, !llvm.loop !14

57:                                               ; preds = %52
  %58 = load ptr, ptr %4, align 8, !tbaa !5
  %59 = load ptr, ptr %3, align 8, !tbaa !5
  %60 = ptrtoint ptr %58 to i64
  %61 = ptrtoint ptr %59 to i64
  %62 = sub i64 %60, %61
  %63 = add nsw i64 %62, 1
  %64 = trunc i64 %63 to i32
  store i32 %64, ptr %2, align 4
  store i32 1, ptr %5, align 4
  br label %65

65:                                               ; preds = %57, %9
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #4
  %66 = load i32, ptr %2, align 4
  ret i32 %66
}

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nounwind willreturn memory(read)
declare ptr @strchr(ptr noundef, i32 noundef) #2

; Function Attrs: nounwind willreturn memory(none)
declare ptr @__ctype_b_loc() #3

; 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 willreturn memory(read) "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 #3 = { nounwind willreturn memory(none) "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 #4 = { nounwind }
attributes #5 = { nounwind willreturn memory(read) }
attributes #6 = { nounwind 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 = !{!6, !6, i64 0}
!6 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!7, !7, i64 0}
!10 = !{!11, !11, i64 0}
!11 = !{!"short", !7, i64 0}
!12 = distinct !{!12, !13}
!13 = !{!"llvm.loop.mustprogress"}
!14 = distinct !{!14, !13}


; 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: nofree nounwind memory(read, inaccessiblemem: none) uwtable
define dso_local i32 @str_tlen(ptr noundef %0) local_unnamed_addr #0 {
  %strlen = tail call i64 @strlen(ptr noundef nonnull dereferenceable(1) %0)
  %strchr = getelementptr inbounds i8, ptr %0, i64 %strlen
  %2 = icmp eq ptr %0, null
  br i1 %2, label %26, label %.preheader14

.preheader14:                                     ; preds = %1
  %3 = tail call ptr @__ctype_b_loc() #3
  %4 = load ptr, ptr %3, align 8, !tbaa !5
  br label %5

5:                                                ; preds = %5, %.preheader14
  %.011 = phi ptr [ %11, %5 ], [ %0, %.preheader14 ]
  %6 = load i8, ptr %.011, align 1, !tbaa !9
  %7 = sext i8 %6 to i64
  %8 = getelementptr inbounds i16, ptr %4, i64 %7
  %9 = load i16, ptr %8, align 2, !tbaa !10
  %10 = and i16 %9, 8192
  %.not = icmp eq i16 %10, 0
  %11 = getelementptr inbounds i8, ptr %.011, i64 1
  br i1 %.not, label %.preheader, label %5, !llvm.loop !12

.preheader:                                       ; preds = %5, %16
  %strchr.pn = phi ptr [ %.0, %16 ], [ %strchr, %5 ]
  %.0 = getelementptr inbounds i8, ptr %strchr.pn, i64 -1
  %12 = icmp ugt ptr %.0, %.011
  br i1 %12, label %13, label %.critedge

13:                                               ; preds = %.preheader
  %14 = load i8, ptr %.0, align 1, !tbaa !9
  %15 = icmp sgt i8 %14, -1
  br i1 %15, label %16, label %.critedge

16:                                               ; preds = %13
  %17 = zext nneg i8 %14 to i64
  %18 = getelementptr inbounds i16, ptr %4, i64 %17
  %19 = load i16, ptr %18, align 2, !tbaa !10
  %20 = and i16 %19, 8192
  %.not13 = icmp eq i16 %20, 0
  br i1 %.not13, label %.critedge, label %.preheader, !llvm.loop !14

.critedge:                                        ; preds = %13, %.preheader, %16
  %21 = ptrtoint ptr %.0 to i64
  %22 = ptrtoint ptr %.011 to i64
  %23 = sub i64 %21, %22
  %24 = trunc i64 %23 to i32
  %25 = add i32 %24, 1
  br label %26

26:                                               ; preds = %1, %.critedge
  %.012 = phi i32 [ %25, %.critedge ], [ 0, %1 ]
  ret i32 %.012
}

; Function Attrs: mustprogress nofree nosync nounwind willreturn memory(none)
declare ptr @__ctype_b_loc() local_unnamed_addr #1

; Function Attrs: nofree nounwind willreturn memory(argmem: read)
declare i64 @strlen(ptr nocapture) local_unnamed_addr #2

attributes #0 = { nofree nounwind 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" }
attributes #1 = { mustprogress nofree nosync nounwind willreturn memory(none) "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 = { nofree nounwind willreturn memory(argmem: read) }
attributes #3 = { nounwind 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 = !{!6, !6, i64 0}
!6 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!7, !7, i64 0}
!10 = !{!11, !11, i64 0}
!11 = !{!"short", !7, i64 0}
!12 = distinct !{!12, !13}
!13 = !{!"llvm.loop.mustprogress"}
!14 = distinct !{!14, !13}


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