; LLVM IR from buresjan/optim_lbm :: nomad/ext/sgtelib/src (Surrogate_Utils)

; 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.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: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

declare i32 @__gxx_personality_v0(...)

; Function Attrs: mustprogress nounwind uwtable
declare void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32)) unnamed_addr #1 align 2

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress uwtable
define dso_local void @_ZN7SGTELIB7deblankERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE(ptr dead_on_unwind noalias writable sret(%"class.std::__cxx11::basic_string") align 8 %0, ptr noundef nonnull align 8 dereferenceable(32) %1) #2 personality ptr @__gxx_personality_v0 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca i1, align 1
  %6 = alloca ptr, align 8
  %7 = alloca i32, align 4
  %8 = alloca i64, align 8
  store ptr %0, ptr %3, align 8
  store ptr %1, ptr %4, align 8, !tbaa !5
  store i1 false, ptr %5, align 1
  %9 = load ptr, ptr %4, align 8, !tbaa !5
  call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEC2ERKS4_(ptr noundef nonnull align 8 dereferenceable(32) %0, ptr noundef nonnull align 8 dereferenceable(32) %9)
  br label %10

10:                                               ; preds = %23, %2
  %11 = call noundef i64 @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE6lengthEv(ptr noundef nonnull align 8 dereferenceable(32) %0) #3
  %12 = icmp ne i64 %11, 0
  br i1 %12, label %13, label %19

13:                                               ; preds = %10
  %14 = invoke noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE2atEm(ptr noundef nonnull align 8 dereferenceable(32) %0, i64 noundef 0)
          to label %15 unwind label %24

15:                                               ; preds = %13
  %16 = load i8, ptr %14, align 1, !tbaa !9
  %17 = sext i8 %16 to i32
  %18 = icmp eq i32 %17, 32
  br label %19

19:                                               ; preds = %15, %10
  %20 = phi i1 [ false, %10 ], [ %18, %15 ]
  br i1 %20, label %21, label %28

21:                                               ; preds = %19
  %22 = invoke noundef nonnull align 8 dereferenceable(32) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE5eraseEmm(ptr noundef nonnull align 8 dereferenceable(32) %0, i64 noundef 0, i64 noundef 1)
          to label %23 unwind label %24

23:                                               ; preds = %21
  br label %10, !llvm.loop !10

24:                                               ; preds = %21, %13
  %25 = landingpad { ptr, i32 }
          cleanup
  %26 = extractvalue { ptr, i32 } %25, 0
  store ptr %26, ptr %6, align 8
  %27 = extractvalue { ptr, i32 } %25, 1
  store i32 %27, ptr %7, align 4
  br label %87

28:                                               ; preds = %19
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #3
  %29 = call noundef i64 @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE6lengthEv(ptr noundef nonnull align 8 dereferenceable(32) %0) #3
  store i64 %29, ptr %8, align 8, !tbaa !12
  br label %30

30:                                               ; preds = %47, %28
  %31 = load i64, ptr %8, align 8, !tbaa !12
  %32 = icmp ugt i64 %31, 0
  br i1 %32, label %33, label %41

33:                                               ; preds = %30
  %34 = load i64, ptr %8, align 8, !tbaa !12
  %35 = sub i64 %34, 1
  %36 = invoke noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE2atEm(ptr noundef nonnull align 8 dereferenceable(32) %0, i64 noundef %35)
          to label %37 unwind label %50

37:                                               ; preds = %33
  %38 = load i8, ptr %36, align 1, !tbaa !9
  %39 = sext i8 %38 to i32
  %40 = icmp eq i32 %39, 32
  br label %41

41:                                               ; preds = %37, %30
  %42 = phi i1 [ false, %30 ], [ %40, %37 ]
  br i1 %42, label %43, label %54

43:                                               ; preds = %41
  %44 = load i64, ptr %8, align 8, !tbaa !12
  %45 = sub i64 %44, 1
  %46 = invoke noundef nonnull align 8 dereferenceable(32) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE5eraseEmm(ptr noundef nonnull align 8 dereferenceable(32) %0, i64 noundef %45, i64 noundef 1)
          to label %47 unwind label %50

47:                                               ; preds = %43
  %48 = load i64, ptr %8, align 8, !tbaa !12
  %49 = add i64 %48, -1
  store i64 %49, ptr %8, align 8, !tbaa !12
  br label %30, !llvm.loop !14

50:                                               ; preds = %75, %67, %60, %43, %33
  %51 = landingpad { ptr, i32 }
          cleanup
  %52 = extractvalue { ptr, i32 } %51, 0
  store ptr %52, ptr %6, align 8
  %53 = extractvalue { ptr, i32 } %51, 1
  store i32 %53, ptr %7, align 4
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #3
  br label %87

54:                                               ; preds = %41
  store i64 1, ptr %8, align 8, !tbaa !12
  br label %55

55:                                               ; preds = %82, %54
  %56 = load i64, ptr %8, align 8, !tbaa !12
  %57 = add i64 %56, 2
  %58 = call noundef i64 @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE6lengthEv(ptr noundef nonnull align 8 dereferenceable(32) %0) #3
  %59 = icmp ult i64 %57, %58
  br i1 %59, label %60, label %83

60:                                               ; preds = %55
  %61 = load i64, ptr %8, align 8, !tbaa !12
  %62 = invoke noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE2atEm(ptr noundef nonnull align 8 dereferenceable(32) %0, i64 noundef %61)
          to label %63 unwind label %50

63:                                               ; preds = %60
  %64 = load i8, ptr %62, align 1, !tbaa !9
  %65 = sext i8 %64 to i32
  %66 = icmp eq i32 %65, 32
  br i1 %66, label %67, label %79

67:                                               ; preds = %63
  %68 = load i64, ptr %8, align 8, !tbaa !12
  %69 = add i64 %68, 1
  %70 = invoke noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE2atEm(ptr noundef nonnull align 8 dereferenceable(32) %0, i64 noundef %69)
          to label %71 unwind label %50

71:                                               ; preds = %67
  %72 = load i8, ptr %70, align 1, !tbaa !9
  %73 = sext i8 %72 to i32
  %74 = icmp eq i32 %73, 32
  br i1 %74, label %75, label %79

75:                                               ; preds = %71
  %76 = load i64, ptr %8, align 8, !tbaa !12
  %77 = invoke noundef nonnull align 8 dereferenceable(32) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE5eraseEmm(ptr noundef nonnull align 8 dereferenceable(32) %0, i64 noundef %76, i64 noundef 1)
          to label %78 unwind label %50

78:                                               ; preds = %75
  br label %82

79:                                               ; preds = %71, %63
  %80 = load i64, ptr %8, align 8, !tbaa !12
  %81 = add i64 %80, 1
  store i64 %81, ptr %8, align 8, !tbaa !12
  br label %82

82:                                               ; preds = %79, %78
  br label %55, !llvm.loop !15

83:                                               ; preds = %55
  store i1 true, ptr %5, align 1
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #3
  %84 = load i1, ptr %5, align 1
  br i1 %84, label %86, label %85

85:                                               ; preds = %83
  call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32) %0) #3
  br label %86

86:                                               ; preds = %85, %83
  ret void

87:                                               ; preds = %50, %24
  call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32) %0) #3
  br label %88

88:                                               ; preds = %87
  %89 = load ptr, ptr %6, align 8
  %90 = load i32, ptr %7, align 4
  %91 = insertvalue { ptr, i32 } poison, ptr %89, 0
  %92 = insertvalue { ptr, i32 } %91, i32 %90, 1
  resume { ptr, i32 } %92
}

; Function Attrs: mustprogress uwtable
declare void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEC2ERKS4_(ptr noundef nonnull align 8 dereferenceable(32), ptr noundef nonnull align 8 dereferenceable(32)) unnamed_addr #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare noundef i64 @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE6lengthEv(ptr noundef nonnull align 8 dereferenceable(32)) #1 align 2

; Function Attrs: mustprogress uwtable
declare noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE2atEm(ptr noundef nonnull align 8 dereferenceable(32), i64 noundef) #2 align 2

; Function Attrs: mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(32) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE5eraseEmm(ptr noundef nonnull align 8 dereferenceable(32), i64 noundef, i64 noundef) #2 align 2

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 = { 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 #3 = { 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 = !{!7, !7, i64 0}
!10 = distinct !{!10, !11}
!11 = !{!"llvm.loop.mustprogress"}
!12 = !{!13, !13, i64 0}
!13 = !{!"long", !7, i64 0}
!14 = distinct !{!14, !11}
!15 = distinct !{!15, !11}


; 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"

%"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] }

declare i32 @__gxx_personality_v0(...)

; Function Attrs: mustprogress nounwind uwtable
declare void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32)) unnamed_addr #0 align 2

; Function Attrs: mustprogress uwtable
define dso_local void @_ZN7SGTELIB7deblankERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE(ptr dead_on_unwind noalias nonnull writable sret(%"class.std::__cxx11::basic_string") align 8 %0, ptr noundef nonnull align 8 dereferenceable(32) %1) local_unnamed_addr #1 personality ptr @__gxx_personality_v0 {
  tail call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEC2ERKS4_(ptr noundef nonnull align 8 dereferenceable(32) %0, ptr noundef nonnull align 8 dereferenceable(32) %1)
  br label %3

3:                                                ; preds = %10, %2
  %4 = tail call noundef i64 @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE6lengthEv(ptr noundef nonnull align 8 dereferenceable(32) %0) #2
  %.not = icmp eq i64 %4, 0
  br i1 %.not, label %.critedge, label %5

5:                                                ; preds = %3
  %6 = invoke noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE2atEm(ptr noundef nonnull align 8 dereferenceable(32) %0, i64 noundef 0)
          to label %7 unwind label %12

7:                                                ; preds = %5
  %8 = load i8, ptr %6, align 1, !tbaa !5
  %9 = icmp eq i8 %8, 32
  br i1 %9, label %10, label %.critedge

10:                                               ; preds = %7
  %11 = invoke noundef nonnull align 8 dereferenceable(32) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE5eraseEmm(ptr noundef nonnull align 8 dereferenceable(32) %0, i64 noundef 0, i64 noundef 1)
          to label %3 unwind label %12, !llvm.loop !8

12:                                               ; preds = %10, %5
  %13 = landingpad { ptr, i32 }
          cleanup
  br label %41

.critedge:                                        ; preds = %3, %7
  %14 = tail call noundef i64 @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE6lengthEv(ptr noundef nonnull align 8 dereferenceable(32) %0) #2
  br label %15

15:                                               ; preds = %22, %.critedge
  %.0 = phi i64 [ %14, %.critedge ], [ %17, %22 ]
  %.not16 = icmp eq i64 %.0, 0
  br i1 %.not16, label %.critedge2, label %16

16:                                               ; preds = %15
  %17 = add i64 %.0, -1
  %18 = invoke noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE2atEm(ptr noundef nonnull align 8 dereferenceable(32) %0, i64 noundef %17)
          to label %19 unwind label %.loopexit.split-lp

19:                                               ; preds = %16
  %20 = load i8, ptr %18, align 1, !tbaa !5
  %21 = icmp eq i8 %20, 32
  br i1 %21, label %22, label %.critedge2

22:                                               ; preds = %19
  %23 = invoke noundef nonnull align 8 dereferenceable(32) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE5eraseEmm(ptr noundef nonnull align 8 dereferenceable(32) %0, i64 noundef %17, i64 noundef 1)
          to label %15 unwind label %.loopexit.split-lp, !llvm.loop !10

.loopexit:                                        ; preds = %.lr.ph, %31, %36
  %lpad.loopexit = landingpad { ptr, i32 }
          cleanup
  br label %41

.loopexit.split-lp:                               ; preds = %16, %22
  %lpad.loopexit.split-lp = landingpad { ptr, i32 }
          cleanup
  br label %41

.critedge2:                                       ; preds = %15, %19
  %24 = tail call noundef i64 @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE6lengthEv(ptr noundef nonnull align 8 dereferenceable(32) %0) #2
  %25 = icmp ugt i64 %24, 3
  br i1 %25, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %.critedge2, %._crit_edge19
  %.118 = phi i64 [ %.2, %._crit_edge19 ], [ 1, %.critedge2 ]
  %26 = invoke noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE2atEm(ptr noundef nonnull align 8 dereferenceable(32) %0, i64 noundef %.118)
          to label %27 unwind label %.loopexit

27:                                               ; preds = %.lr.ph
  %28 = load i8, ptr %26, align 1, !tbaa !5
  %29 = icmp eq i8 %28, 32
  %30 = add i64 %.118, 1
  br i1 %29, label %31, label %._crit_edge19

31:                                               ; preds = %27
  %32 = invoke noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE2atEm(ptr noundef nonnull align 8 dereferenceable(32) %0, i64 noundef %30)
          to label %33 unwind label %.loopexit

33:                                               ; preds = %31
  %34 = load i8, ptr %32, align 1, !tbaa !5
  %35 = icmp eq i8 %34, 32
  br i1 %35, label %36, label %._crit_edge19

36:                                               ; preds = %33
  %37 = invoke noundef nonnull align 8 dereferenceable(32) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE5eraseEmm(ptr noundef nonnull align 8 dereferenceable(32) %0, i64 noundef %.118, i64 noundef 1)
          to label %._crit_edge19 unwind label %.loopexit

._crit_edge19:                                    ; preds = %27, %33, %36
  %.2 = phi i64 [ %.118, %36 ], [ %30, %33 ], [ %30, %27 ]
  %38 = add i64 %.2, 2
  %39 = tail call noundef i64 @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE6lengthEv(ptr noundef nonnull align 8 dereferenceable(32) %0) #2
  %40 = icmp ult i64 %38, %39
  br i1 %40, label %.lr.ph, label %._crit_edge, !llvm.loop !11

._crit_edge:                                      ; preds = %._crit_edge19, %.critedge2
  ret void

41:                                               ; preds = %.loopexit, %.loopexit.split-lp, %12
  %.pn = phi { ptr, i32 } [ %13, %12 ], [ %lpad.loopexit, %.loopexit ], [ %lpad.loopexit.split-lp, %.loopexit.split-lp ]
  tail call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32) %0) #2
  resume { ptr, i32 } %.pn
}

; Function Attrs: mustprogress uwtable
declare void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEC2ERKS4_(ptr noundef nonnull align 8 dereferenceable(32), ptr noundef nonnull align 8 dereferenceable(32)) unnamed_addr #1 align 2

; Function Attrs: mustprogress nounwind uwtable
declare noundef i64 @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE6lengthEv(ptr noundef nonnull align 8 dereferenceable(32)) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress uwtable
declare noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE2atEm(ptr noundef nonnull align 8 dereferenceable(32), i64 noundef) local_unnamed_addr #1 align 2

; Function Attrs: mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(32) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE5eraseEmm(ptr noundef nonnull align 8 dereferenceable(32), i64 noundef, i64 noundef) local_unnamed_addr #1 align 2

attributes #0 = { 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 #1 = { 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 #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 = distinct !{!8, !9}
!9 = !{!"llvm.loop.mustprogress"}
!10 = distinct !{!10, !9}
!11 = distinct !{!11, !9}


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