; LLVM IR from Aeternum-Veritas/Merry :: legacy/MerryAssembler/src/lexer.ll (ZN5merry9front_end5Lexer15skip_whitespaceEv)

; 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"

%"class.merry::front_end::Lexer" = type <{ %"class.merry::core::Loc", %"class.std::__cxx11::basic_string", i64, i8, [7 x i8] }>
%"class.merry::core::Loc" = type { i64, i64, %"class.std::__cxx11::basic_string" }
%"class.std::__cxx11::basic_string" = type { %"struct.std::__cxx11::basic_string<char>::_Alloc_hider", i64, %union.anon }
%"struct.std::__cxx11::basic_string<char>::_Alloc_hider" = type { ptr }
%union.anon = type { i64, [8 x i8] }

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZN5merry9front_end5Lexer7advanceEv(ptr noundef nonnull align 8 dereferenceable(89)) #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare noundef i64 @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(32)) #1 align 2

; Function Attrs: mustprogress uwtable
define dso_local void @_ZN5merry9front_end5Lexer15skip_whitespaceEv(ptr noundef nonnull align 8 dereferenceable(89) %0) #0 align 2 {
  %2 = alloca ptr, align 8
  store ptr %0, ptr %2, align 8, !tbaa !5
  %3 = load ptr, ptr %2, align 8
  br label %4

4:                                                ; preds = %15, %1
  %5 = call noundef zeroext i1 @_ZN5merry9front_end5Lexer6isskipEv(ptr noundef nonnull align 8 dereferenceable(89) %3)
  br i1 %5, label %6, label %13

6:                                                ; preds = %4
  %7 = getelementptr inbounds %"class.merry::front_end::Lexer", ptr %3, i32 0, i32 2
  %8 = load i64, ptr %7, align 8, !tbaa !9
  %9 = getelementptr inbounds %"class.merry::front_end::Lexer", ptr %3, i32 0, i32 1
  %10 = call noundef i64 @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(32) %9) #2
  %11 = sub i64 %10, 1
  %12 = icmp ult i64 %8, %11
  br label %13

13:                                               ; preds = %6, %4
  %14 = phi i1 [ false, %4 ], [ %12, %6 ]
  br i1 %14, label %15, label %16

15:                                               ; preds = %13
  call void @_ZN5merry9front_end5Lexer7advanceEv(ptr noundef nonnull align 8 dereferenceable(89) %3)
  br label %4, !llvm.loop !15

16:                                               ; preds = %13
  ret void
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_ZN5merry9front_end5Lexer6isskipEv(ptr noundef nonnull align 8 dereferenceable(89)) #1 align 2

attributes #0 = { mustprogress 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 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++ TBAA"}
!9 = !{!10, !12, i64 80}
!10 = !{!"_ZTSN5merry9front_end5LexerE", !11, i64 0, !13, i64 48, !12, i64 80, !7, i64 88}
!11 = !{!"_ZTSN5merry4core3LocE", !12, i64 0, !12, i64 8, !13, i64 16}
!12 = !{!"long", !7, i64 0}
!13 = !{!"_ZTSNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE", !14, i64 0, !12, i64 8, !7, i64 16}
!14 = !{!"_ZTSNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE12_Alloc_hiderE", !6, i64 0}
!15 = distinct !{!15, !16}
!16 = !{!"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: mustprogress uwtable
declare dso_local void @_ZN5merry9front_end5Lexer7advanceEv(ptr noundef nonnull align 8 dereferenceable(89)) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare noundef i64 @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(32)) local_unnamed_addr #1 align 2

; Function Attrs: mustprogress uwtable
define dso_local void @_ZN5merry9front_end5Lexer15skip_whitespaceEv(ptr noundef nonnull align 8 dereferenceable(89) %0) local_unnamed_addr #0 align 2 {
  %2 = getelementptr inbounds i8, ptr %0, i64 80
  %3 = tail call noundef zeroext i1 @_ZN5merry9front_end5Lexer6isskipEv(ptr noundef nonnull align 8 dereferenceable(89) %0)
  br i1 %3, label %.lr.ph, label %.critedge

.lr.ph:                                           ; preds = %1
  %4 = getelementptr inbounds i8, ptr %0, i64 48
  br label %5

5:                                                ; preds = %.lr.ph, %10
  %6 = load i64, ptr %2, align 8, !tbaa !5
  %7 = tail call noundef i64 @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(32) %4) #2
  %8 = add i64 %7, -1
  %9 = icmp ult i64 %6, %8
  br i1 %9, label %10, label %.critedge

10:                                               ; preds = %5
  tail call void @_ZN5merry9front_end5Lexer7advanceEv(ptr noundef nonnull align 8 dereferenceable(89) %0)
  %11 = tail call noundef zeroext i1 @_ZN5merry9front_end5Lexer6isskipEv(ptr noundef nonnull align 8 dereferenceable(89) %0)
  br i1 %11, label %5, label %.critedge, !llvm.loop !14

.critedge:                                        ; preds = %5, %10, %1
  ret void
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_ZN5merry9front_end5Lexer6isskipEv(ptr noundef nonnull align 8 dereferenceable(89)) local_unnamed_addr #1 align 2

attributes #0 = { mustprogress 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 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, !8, i64 80}
!6 = !{!"_ZTSN5merry9front_end5LexerE", !7, i64 0, !11, i64 48, !8, i64 80, !9, i64 88}
!7 = !{!"_ZTSN5merry4core3LocE", !8, i64 0, !8, i64 8, !11, i64 16}
!8 = !{!"long", !9, i64 0}
!9 = !{!"omnipotent char", !10, i64 0}
!10 = !{!"Simple C++ TBAA"}
!11 = !{!"_ZTSNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE", !12, i64 0, !8, i64 8, !9, i64 16}
!12 = !{!"_ZTSNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE12_Alloc_hiderE", !13, i64 0}
!13 = !{!"any pointer", !9, i64 0}
!14 = distinct !{!14, !15}
!15 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: GlobalOptPass,InstCombinePass,JumpThreadingPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimplifyCFGPass,TailCallElimPass