; LLVM IR from buresjan/optim_lbm :: nomad/ext/sgtelib/src/Matrix.ll (ZN7SGTELIB6Matrix16hadamard_inverseEv)

; 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] }
%"class.SGTELIB::Matrix" = type { ptr, %"class.std::__cxx11::basic_string", i32, i32, ptr }

@.str.55 = external hidden unnamed_addr constant [2 x i8], align 1
@.str.57 = external hidden unnamed_addr constant [6 x i8], align 1

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

; 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: mustprogress nounwind uwtable
declare noundef nonnull align 8 dereferenceable(32) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEaSEOS4_(ptr noundef nonnull align 8 dereferenceable(32), ptr noundef nonnull align 8 dereferenceable(32)) #1 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZStplIcSt11char_traitsIcESaIcEENSt7__cxx1112basic_stringIT_T0_T1_EEPKS5_RKS8_(ptr dead_on_unwind noalias writable sret(%"class.std::__cxx11::basic_string") align 8, ptr noundef, ptr noundef nonnull align 8 dereferenceable(32)) #2

; Function Attrs: inlinehint mustprogress uwtable
declare dso_local void @_ZStplIcSt11char_traitsIcESaIcEENSt7__cxx1112basic_stringIT_T0_T1_EEOS8_PKS5_(ptr dead_on_unwind noalias writable sret(%"class.std::__cxx11::basic_string") align 8, ptr noundef nonnull align 8 dereferenceable(32), ptr noundef) #3

; Function Attrs: mustprogress uwtable
define dso_local void @_ZN7SGTELIB6Matrix16hadamard_inverseEv(ptr noundef nonnull align 8 dereferenceable(56) %0) #2 align 2 personality ptr @__gxx_personality_v0 {
  %2 = alloca ptr, align 8
  %3 = alloca %"class.std::__cxx11::basic_string", align 8
  %4 = alloca %"class.std::__cxx11::basic_string", align 8
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  %8 = alloca i32, align 4
  store ptr %0, ptr %2, align 8, !tbaa !5
  %9 = load ptr, ptr %2, align 8
  call void @llvm.lifetime.start.p0(i64 32, ptr %3) #4
  call void @llvm.lifetime.start.p0(i64 32, ptr %4) #4
  %10 = getelementptr inbounds %"class.SGTELIB::Matrix", ptr %9, i32 0, i32 1
  call void @_ZStplIcSt11char_traitsIcESaIcEENSt7__cxx1112basic_stringIT_T0_T1_EEPKS5_RKS8_(ptr dead_on_unwind writable sret(%"class.std::__cxx11::basic_string") align 8 %4, ptr noundef @.str.55, ptr noundef nonnull align 8 dereferenceable(32) %10)
  invoke void @_ZStplIcSt11char_traitsIcESaIcEENSt7__cxx1112basic_stringIT_T0_T1_EEOS8_PKS5_(ptr dead_on_unwind writable sret(%"class.std::__cxx11::basic_string") align 8 %3, ptr noundef nonnull align 8 dereferenceable(32) %4, ptr noundef @.str.57)
          to label %11 unwind label %49

11:                                               ; preds = %1
  %12 = getelementptr inbounds %"class.SGTELIB::Matrix", ptr %9, i32 0, i32 1
  %13 = call noundef nonnull align 8 dereferenceable(32) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEaSEOS4_(ptr noundef nonnull align 8 dereferenceable(32) %12, ptr noundef nonnull align 8 dereferenceable(32) %3) #4
  call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32) %3) #4
  call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32) %4) #4
  call void @llvm.lifetime.end.p0(i64 32, ptr %4) #4
  call void @llvm.lifetime.end.p0(i64 32, ptr %3) #4
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #4
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #4
  store i32 0, ptr %7, align 4, !tbaa !9
  br label %14

14:                                               ; preds = %54, %11
  %15 = load i32, ptr %7, align 4, !tbaa !9
  %16 = getelementptr inbounds %"class.SGTELIB::Matrix", ptr %9, i32 0, i32 2
  %17 = load i32, ptr %16, align 8, !tbaa !11
  %18 = icmp slt i32 %15, %17
  br i1 %18, label %19, label %57

19:                                               ; preds = %14
  store i32 0, ptr %8, align 4, !tbaa !9
  br label %20

20:                                               ; preds = %46, %19
  %21 = load i32, ptr %8, align 4, !tbaa !9
  %22 = getelementptr inbounds %"class.SGTELIB::Matrix", ptr %9, i32 0, i32 3
  %23 = load i32, ptr %22, align 4, !tbaa !16
  %24 = icmp slt i32 %21, %23
  br i1 %24, label %25, label %53

25:                                               ; preds = %20
  %26 = getelementptr inbounds %"class.SGTELIB::Matrix", ptr %9, i32 0, i32 4
  %27 = load ptr, ptr %26, align 8, !tbaa !17
  %28 = load i32, ptr %7, align 4, !tbaa !9
  %29 = sext i32 %28 to i64
  %30 = getelementptr inbounds ptr, ptr %27, i64 %29
  %31 = load ptr, ptr %30, align 8, !tbaa !5
  %32 = load i32, ptr %8, align 4, !tbaa !9
  %33 = sext i32 %32 to i64
  %34 = getelementptr inbounds double, ptr %31, i64 %33
  %35 = load double, ptr %34, align 8, !tbaa !18
  %36 = fdiv double 1.000000e+00, %35
  %37 = getelementptr inbounds %"class.SGTELIB::Matrix", ptr %9, i32 0, i32 4
  %38 = load ptr, ptr %37, align 8, !tbaa !17
  %39 = load i32, ptr %7, align 4, !tbaa !9
  %40 = sext i32 %39 to i64
  %41 = getelementptr inbounds ptr, ptr %38, i64 %40
  %42 = load ptr, ptr %41, align 8, !tbaa !5
  %43 = load i32, ptr %8, align 4, !tbaa !9
  %44 = sext i32 %43 to i64
  %45 = getelementptr inbounds double, ptr %42, i64 %44
  store double %36, ptr %45, align 8, !tbaa !18
  br label %46

46:                                               ; preds = %25
  %47 = load i32, ptr %8, align 4, !tbaa !9
  %48 = add nsw i32 %47, 1
  store i32 %48, ptr %8, align 4, !tbaa !9
  br label %20, !llvm.loop !20

49:                                               ; preds = %1
  %50 = landingpad { ptr, i32 }
          cleanup
  %51 = extractvalue { ptr, i32 } %50, 0
  store ptr %51, ptr %5, align 8
  %52 = extractvalue { ptr, i32 } %50, 1
  store i32 %52, ptr %6, align 4
  call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32) %4) #4
  call void @llvm.lifetime.end.p0(i64 32, ptr %4) #4
  call void @llvm.lifetime.end.p0(i64 32, ptr %3) #4
  br label %58

53:                                               ; preds = %20
  br label %54

54:                                               ; preds = %53
  %55 = load i32, ptr %7, align 4, !tbaa !9
  %56 = add nsw i32 %55, 1
  store i32 %56, ptr %7, align 4, !tbaa !9
  br label %14, !llvm.loop !22

57:                                               ; preds = %14
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #4
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #4
  ret void

58:                                               ; preds = %49
  %59 = load ptr, ptr %5, align 8
  %60 = load i32, ptr %6, align 4
  %61 = insertvalue { ptr, i32 } poison, ptr %59, 0
  %62 = insertvalue { ptr, i32 } %61, i32 %60, 1
  resume { ptr, i32 } %62
}

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 = { inlinehint 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 #4 = { 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, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = !{!12, !10, i64 40}
!12 = !{!"_ZTSN7SGTELIB6MatrixE", !13, i64 8, !10, i64 40, !10, i64 44, !6, i64 48}
!13 = !{!"_ZTSNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE", !14, i64 0, !15, i64 8, !7, i64 16}
!14 = !{!"_ZTSNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE12_Alloc_hiderE", !6, i64 0}
!15 = !{!"long", !7, i64 0}
!16 = !{!12, !10, i64 44}
!17 = !{!12, !6, i64 48}
!18 = !{!19, !19, i64 0}
!19 = !{!"double", !7, i64 0}
!20 = distinct !{!20, !21}
!21 = !{!"llvm.loop.mustprogress"}
!22 = distinct !{!22, !21}


; 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] }

@.str.55 = external hidden unnamed_addr constant [2 x i8], align 1
@.str.57 = external hidden unnamed_addr constant [6 x i8], align 1

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

; 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: mustprogress nounwind uwtable
declare noundef nonnull align 8 dereferenceable(32) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEaSEOS4_(ptr noundef nonnull align 8 dereferenceable(32), ptr noundef nonnull align 8 dereferenceable(32)) local_unnamed_addr #1 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZStplIcSt11char_traitsIcESaIcEENSt7__cxx1112basic_stringIT_T0_T1_EEPKS5_RKS8_(ptr dead_on_unwind noalias writable sret(%"class.std::__cxx11::basic_string") align 8, ptr noundef, ptr noundef nonnull align 8 dereferenceable(32)) local_unnamed_addr #2

; Function Attrs: inlinehint mustprogress uwtable
declare dso_local void @_ZStplIcSt11char_traitsIcESaIcEENSt7__cxx1112basic_stringIT_T0_T1_EEOS8_PKS5_(ptr dead_on_unwind noalias writable sret(%"class.std::__cxx11::basic_string") align 8, ptr noundef nonnull align 8 dereferenceable(32), ptr noundef) local_unnamed_addr #3

; Function Attrs: mustprogress uwtable
define dso_local void @_ZN7SGTELIB6Matrix16hadamard_inverseEv(ptr noundef nonnull align 8 dereferenceable(56) %0) local_unnamed_addr #2 align 2 personality ptr @__gxx_personality_v0 {
  %2 = alloca %"class.std::__cxx11::basic_string", align 8
  %3 = alloca %"class.std::__cxx11::basic_string", align 8
  call void @llvm.lifetime.start.p0(i64 32, ptr nonnull %2) #4
  call void @llvm.lifetime.start.p0(i64 32, ptr nonnull %3) #4
  %4 = getelementptr inbounds i8, ptr %0, i64 8
  call void @_ZStplIcSt11char_traitsIcESaIcEENSt7__cxx1112basic_stringIT_T0_T1_EEPKS5_RKS8_(ptr dead_on_unwind nonnull writable sret(%"class.std::__cxx11::basic_string") align 8 %3, ptr noundef nonnull @.str.55, ptr noundef nonnull align 8 dereferenceable(32) %4)
  invoke void @_ZStplIcSt11char_traitsIcESaIcEENSt7__cxx1112basic_stringIT_T0_T1_EEOS8_PKS5_(ptr dead_on_unwind nonnull writable sret(%"class.std::__cxx11::basic_string") align 8 %2, ptr noundef nonnull align 8 dereferenceable(32) %3, ptr noundef nonnull @.str.57)
          to label %5 unwind label %23

5:                                                ; preds = %1
  %6 = call noundef nonnull align 8 dereferenceable(32) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEaSEOS4_(ptr noundef nonnull align 8 dereferenceable(32) %4, ptr noundef nonnull align 8 dereferenceable(32) %2) #4
  call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32) %2) #4
  call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32) %3) #4
  call void @llvm.lifetime.end.p0(i64 32, ptr nonnull %3) #4
  call void @llvm.lifetime.end.p0(i64 32, ptr nonnull %2) #4
  %7 = getelementptr inbounds i8, ptr %0, i64 40
  %8 = load i32, ptr %7, align 8, !tbaa !5
  %9 = icmp sgt i32 %8, 0
  br i1 %9, label %.preheader.lr.ph, label %._crit_edge13

.preheader.lr.ph:                                 ; preds = %5
  %10 = getelementptr inbounds i8, ptr %0, i64 44
  %11 = load i32, ptr %10, align 4, !tbaa !14
  %12 = icmp sgt i32 %11, 0
  %13 = getelementptr inbounds i8, ptr %0, i64 48
  %14 = load ptr, ptr %13, align 8
  br i1 %12, label %.preheader.us.preheader, label %._crit_edge13

.preheader.us.preheader:                          ; preds = %.preheader.lr.ph
  %wide.trip.count19 = zext nneg i32 %8 to i64
  %wide.trip.count = zext nneg i32 %11 to i64
  %min.iters.check = icmp eq i32 %11, 1
  %n.vec = and i64 %wide.trip.count, 2147483646
  %cmp.n = icmp eq i64 %n.vec, %wide.trip.count
  br label %.preheader.us

.preheader.us:                                    ; preds = %.preheader.us.preheader, %._crit_edge.us
  %indvars.iv16 = phi i64 [ 0, %.preheader.us.preheader ], [ %indvars.iv.next17, %._crit_edge.us ]
  %15 = getelementptr inbounds ptr, ptr %14, i64 %indvars.iv16
  %16 = load ptr, ptr %15, align 8, !tbaa !15
  br i1 %min.iters.check, label %scalar.ph.preheader, label %vector.body

vector.body:                                      ; preds = %.preheader.us, %vector.body
  %index = phi i64 [ %index.next, %vector.body ], [ 0, %.preheader.us ]
  %17 = getelementptr inbounds double, ptr %16, i64 %index
  %wide.load = load <2 x double>, ptr %17, align 8, !tbaa !16
  %18 = fdiv <2 x double> <double 1.000000e+00, double 1.000000e+00>, %wide.load
  store <2 x double> %18, ptr %17, align 8, !tbaa !16
  %index.next = add nuw i64 %index, 2
  %19 = icmp eq i64 %index.next, %n.vec
  br i1 %19, label %middle.block, label %vector.body, !llvm.loop !18

middle.block:                                     ; preds = %vector.body
  br i1 %cmp.n, label %._crit_edge.us, label %scalar.ph.preheader

scalar.ph.preheader:                              ; preds = %middle.block, %.preheader.us
  %indvars.iv.ph = phi i64 [ 0, %.preheader.us ], [ %n.vec, %middle.block ]
  br label %scalar.ph

scalar.ph:                                        ; preds = %scalar.ph.preheader, %scalar.ph
  %indvars.iv = phi i64 [ %indvars.iv.next, %scalar.ph ], [ %indvars.iv.ph, %scalar.ph.preheader ]
  %20 = getelementptr inbounds double, ptr %16, i64 %indvars.iv
  %21 = load double, ptr %20, align 8, !tbaa !16
  %22 = fdiv double 1.000000e+00, %21
  store double %22, ptr %20, align 8, !tbaa !16
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %exitcond.not = icmp eq i64 %indvars.iv.next, %wide.trip.count
  br i1 %exitcond.not, label %._crit_edge.us, label %scalar.ph, !llvm.loop !22

._crit_edge.us:                                   ; preds = %scalar.ph, %middle.block
  %indvars.iv.next17 = add nuw nsw i64 %indvars.iv16, 1
  %exitcond20.not = icmp eq i64 %indvars.iv.next17, %wide.trip.count19
  br i1 %exitcond20.not, label %._crit_edge13, label %.preheader.us, !llvm.loop !23

23:                                               ; preds = %1
  %24 = landingpad { ptr, i32 }
          cleanup
  call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32) %3) #4
  call void @llvm.lifetime.end.p0(i64 32, ptr nonnull %3) #4
  call void @llvm.lifetime.end.p0(i64 32, ptr nonnull %2) #4
  resume { ptr, i32 } %24

._crit_edge13:                                    ; preds = %._crit_edge.us, %.preheader.lr.ph, %5
  ret void
}

attributes #0 = { mustprogress 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 = { inlinehint 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 #4 = { 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, !13, i64 40}
!6 = !{!"_ZTSN7SGTELIB6MatrixE", !7, i64 8, !13, i64 40, !13, i64 44, !9, i64 48}
!7 = !{!"_ZTSNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE", !8, i64 0, !12, i64 8, !10, i64 16}
!8 = !{!"_ZTSNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE12_Alloc_hiderE", !9, i64 0}
!9 = !{!"any pointer", !10, i64 0}
!10 = !{!"omnipotent char", !11, i64 0}
!11 = !{!"Simple C++ TBAA"}
!12 = !{!"long", !10, i64 0}
!13 = !{!"int", !10, i64 0}
!14 = !{!6, !13, i64 44}
!15 = !{!9, !9, i64 0}
!16 = !{!17, !17, i64 0}
!17 = !{!"double", !10, i64 0}
!18 = distinct !{!18, !19, !20, !21}
!19 = !{!"llvm.loop.mustprogress"}
!20 = !{!"llvm.loop.isvectorized", i32 1}
!21 = !{!"llvm.loop.unroll.runtime.disable"}
!22 = distinct !{!22, !19, !21, !20}
!23 = distinct !{!23, !19}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LICMPass,LoopLoadEliminationPass,LoopRotatePass,LoopSimplifyCFGPass,LoopSimplifyPass,LoopUnrollPass,LoopVectorizePass,SROAPass,SimplifyCFGPass