; LLVM IR from freakout42/macrocalc :: mc/nro (nrocmd)

; 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 ptr @skipwd(ptr noundef %0) #0 {
  %2 = alloca ptr, align 8
  store ptr %0, ptr %2, align 8, !tbaa !5
  br label %3

3:                                                ; preds = %30, %1
  %4 = load ptr, ptr %2, align 8, !tbaa !5
  %5 = load i8, ptr %4, align 1, !tbaa !9
  %6 = sext i8 %5 to i32
  %7 = icmp ne i32 %6, 32
  br i1 %7, label %8, label %28

8:                                                ; preds = %3
  %9 = load ptr, ptr %2, align 8, !tbaa !5
  %10 = load i8, ptr %9, align 1, !tbaa !9
  %11 = sext i8 %10 to i32
  %12 = icmp ne i32 %11, 9
  br i1 %12, label %13, label %28

13:                                               ; preds = %8
  %14 = load ptr, ptr %2, align 8, !tbaa !5
  %15 = load i8, ptr %14, align 1, !tbaa !9
  %16 = sext i8 %15 to i32
  %17 = icmp ne i32 %16, 13
  br i1 %17, label %18, label %28

18:                                               ; preds = %13
  %19 = load ptr, ptr %2, align 8, !tbaa !5
  %20 = load i8, ptr %19, align 1, !tbaa !9
  %21 = sext i8 %20 to i32
  %22 = icmp ne i32 %21, 10
  br i1 %22, label %23, label %28

23:                                               ; preds = %18
  %24 = load ptr, ptr %2, align 8, !tbaa !5
  %25 = load i8, ptr %24, align 1, !tbaa !9
  %26 = sext i8 %25 to i32
  %27 = icmp ne i32 %26, 0
  br label %28

28:                                               ; preds = %23, %18, %13, %8, %3
  %29 = phi i1 [ false, %18 ], [ false, %13 ], [ false, %8 ], [ false, %3 ], [ %27, %23 ]
  br i1 %29, label %30, label %33

30:                                               ; preds = %28
  %31 = load ptr, ptr %2, align 8, !tbaa !5
  %32 = getelementptr inbounds i8, ptr %31, i32 1
  store ptr %32, ptr %2, align 8, !tbaa !5
  br label %3, !llvm.loop !10

33:                                               ; preds = %28
  %34 = load ptr, ptr %2, align 8, !tbaa !5
  ret ptr %34
}

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 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!7, !7, i64 0}
!10 = distinct !{!10, !11}
!11 = !{!"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: nofree norecurse nosync nounwind memory(read, inaccessiblemem: none) uwtable
define dso_local noundef ptr @skipwd(ptr noundef readonly %0) local_unnamed_addr #0 {
  br label %2

2:                                                ; preds = %4, %1
  %.0 = phi ptr [ %0, %1 ], [ %5, %4 ]
  %3 = load i8, ptr %.0, align 1, !tbaa !5
  switch i8 %3, label %4 [
    i8 32, label %.critedge
    i8 9, label %.critedge
    i8 13, label %.critedge
    i8 10, label %.critedge
    i8 0, label %.critedge
  ]

4:                                                ; preds = %2
  %5 = getelementptr inbounds i8, ptr %.0, i64 1
  br label %2, !llvm.loop !8

.critedge:                                        ; preds = %2, %2, %2, %2, %2
  ret ptr %.0
}

attributes #0 = { nofree norecurse nosync 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" }

!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: EarlyCSEPass,GVNPass,GlobalOptPass,InstCombinePass,InstSimplifyPass,LCSSAPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass