; LLVM IR from UtkarshPathrabe/Competitive-Coding :: SPOJ Solutions/KOPC12A.ll (Z11ComputeCostRK8Building)

; 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::vector" = type { %"struct.std::_Vector_base" }
%"struct.std::_Vector_base" = type { %"struct.std::_Vector_base<Building, std::allocator<Building>>::_Vector_impl" }
%"struct.std::_Vector_base<Building, std::allocator<Building>>::_Vector_impl" = type { %"struct.std::_Vector_base<Building, std::allocator<Building>>::_Vector_impl_data" }
%"struct.std::_Vector_base<Building, std::allocator<Building>>::_Vector_impl_data" = type { ptr, ptr, ptr }
%"class.__gnu_cxx::__normal_iterator" = type { ptr }
%struct.Building = type { i16, i16 }

@Buildings = external dso_local global %"class.std::vector", align 8
@it = external dso_local global %"class.__gnu_cxx::__normal_iterator", align 8

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef i64 @_Z11ComputeCostRK8Building(ptr noundef nonnull align 2 dereferenceable(4) %0) #0 {
  %2 = alloca ptr, align 8
  %3 = alloca i64, align 8
  %4 = alloca %"class.__gnu_cxx::__normal_iterator", align 8
  %5 = alloca %"class.__gnu_cxx::__normal_iterator", align 8
  %6 = alloca %"class.__gnu_cxx::__normal_iterator", align 8
  store ptr %0, ptr %2, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #5
  store i64 0, ptr %3, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #5
  %7 = call ptr @_ZNSt6vectorI8BuildingSaIS0_EE5beginEv(ptr noundef nonnull align 8 dereferenceable(24) @Buildings) #5
  %8 = getelementptr inbounds %"class.__gnu_cxx::__normal_iterator", ptr %4, i32 0, i32 0
  store ptr %7, ptr %8, align 8
  call void @llvm.memcpy.p0.p0.i64(ptr align 8 @it, ptr align 8 %4, i64 8, i1 false), !tbaa.struct !11
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #5
  br label %9

9:                                                ; preds = %32, %1
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #5
  %10 = call ptr @_ZNSt6vectorI8BuildingSaIS0_EE3endEv(ptr noundef nonnull align 8 dereferenceable(24) @Buildings) #5
  %11 = getelementptr inbounds %"class.__gnu_cxx::__normal_iterator", ptr %5, i32 0, i32 0
  store ptr %10, ptr %11, align 8
  %12 = call noundef zeroext i1 @_ZN9__gnu_cxxneIP8BuildingSt6vectorIS1_SaIS1_EEEEbRKNS_17__normal_iteratorIT_T0_EESB_(ptr noundef nonnull align 8 dereferenceable(8) @it, ptr noundef nonnull align 8 dereferenceable(8) %5) #5
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #5
  br i1 %12, label %13, label %35

13:                                               ; preds = %9
  %14 = call noundef nonnull align 2 dereferenceable(4) ptr @_ZNK9__gnu_cxx17__normal_iteratorIP8BuildingSt6vectorIS1_SaIS1_EEEdeEv(ptr noundef nonnull align 8 dereferenceable(8) @it) #5
  %15 = getelementptr inbounds %struct.Building, ptr %14, i32 0, i32 0
  %16 = load i16, ptr %15, align 2, !tbaa !12
  %17 = sext i16 %16 to i32
  %18 = load ptr, ptr %2, align 8, !tbaa !5
  %19 = getelementptr inbounds %struct.Building, ptr %18, i32 0, i32 0
  %20 = load i16, ptr %19, align 2, !tbaa !12
  %21 = sext i16 %20 to i32
  %22 = sub nsw i32 %17, %21
  %23 = call i32 @llvm.abs.i32(i32 %22, i1 true)
  %24 = call noundef nonnull align 2 dereferenceable(4) ptr @_ZNK9__gnu_cxx17__normal_iteratorIP8BuildingSt6vectorIS1_SaIS1_EEEdeEv(ptr noundef nonnull align 8 dereferenceable(8) @it) #5
  %25 = getelementptr inbounds %struct.Building, ptr %24, i32 0, i32 1
  %26 = load i16, ptr %25, align 2, !tbaa !15
  %27 = sext i16 %26 to i32
  %28 = mul nsw i32 %23, %27
  %29 = sext i32 %28 to i64
  %30 = load i64, ptr %3, align 8, !tbaa !9
  %31 = add nsw i64 %30, %29
  store i64 %31, ptr %3, align 8, !tbaa !9
  br label %32

32:                                               ; preds = %13
  %33 = call ptr @_ZN9__gnu_cxx17__normal_iteratorIP8BuildingSt6vectorIS1_SaIS1_EEEppEi(ptr noundef nonnull align 8 dereferenceable(8) @it, i32 noundef 0) #5
  %34 = getelementptr inbounds %"class.__gnu_cxx::__normal_iterator", ptr %6, i32 0, i32 0
  store ptr %33, ptr %34, align 8
  br label %9, !llvm.loop !16

35:                                               ; preds = %9
  %36 = load i64, ptr %3, align 8, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #5
  ret i64 %36
}

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

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNSt6vectorI8BuildingSaIS0_EE5beginEv(ptr noundef nonnull align 8 dereferenceable(24)) #0 align 2

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: readwrite)
declare void @llvm.memcpy.p0.p0.i64(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, i64, i1 immarg) #2

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

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_ZN9__gnu_cxxneIP8BuildingSt6vectorIS1_SaIS1_EEEEbRKNS_17__normal_iteratorIT_T0_EESB_(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef nonnull align 8 dereferenceable(8)) #3

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNSt6vectorI8BuildingSaIS0_EE3endEv(ptr noundef nonnull align 8 dereferenceable(24)) #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 2 dereferenceable(4) ptr @_ZNK9__gnu_cxx17__normal_iteratorIP8BuildingSt6vectorIS1_SaIS1_EEEdeEv(ptr noundef nonnull align 8 dereferenceable(8)) #0 align 2

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i32 @llvm.abs.i32(i32, i1 immarg) #4

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZN9__gnu_cxx17__normal_iteratorIP8BuildingSt6vectorIS1_SaIS1_EEEppEi(ptr noundef nonnull align 8 dereferenceable(8), i32 noundef) #0 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 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { nocallback nofree nounwind willreturn memory(argmem: readwrite) }
attributes #3 = { inlinehint 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 #4 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }
attributes #5 = { 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 = !{!"long long", !7, i64 0}
!11 = !{i64 0, i64 8, !5}
!12 = !{!13, !14, i64 0}
!13 = !{!"_ZTS8Building", !14, i64 0, !14, i64 2}
!14 = !{!"short", !7, i64 0}
!15 = !{!13, !14, i64 2}
!16 = distinct !{!16, !17}
!17 = !{!"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"

%"class.std::vector" = type { %"struct.std::_Vector_base" }
%"struct.std::_Vector_base" = type { %"struct.std::_Vector_base<Building, std::allocator<Building>>::_Vector_impl" }
%"struct.std::_Vector_base<Building, std::allocator<Building>>::_Vector_impl" = type { %"struct.std::_Vector_base<Building, std::allocator<Building>>::_Vector_impl_data" }
%"struct.std::_Vector_base<Building, std::allocator<Building>>::_Vector_impl_data" = type { ptr, ptr, ptr }
%"class.__gnu_cxx::__normal_iterator" = type { ptr }

@Buildings = external dso_local global %"class.std::vector", align 8
@it = external dso_local global %"class.__gnu_cxx::__normal_iterator", align 8

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef i64 @_Z11ComputeCostRK8Building(ptr nocapture noundef nonnull readonly align 2 dereferenceable(4) %0) local_unnamed_addr #0 {
  %2 = alloca %"class.__gnu_cxx::__normal_iterator", align 8
  %3 = tail call ptr @_ZNSt6vectorI8BuildingSaIS0_EE5beginEv(ptr noundef nonnull align 8 dereferenceable(24) @Buildings) #4
  store ptr %3, ptr @it, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %2) #4
  %4 = tail call ptr @_ZNSt6vectorI8BuildingSaIS0_EE3endEv(ptr noundef nonnull align 8 dereferenceable(24) @Buildings) #4
  store ptr %4, ptr %2, align 8
  %5 = call noundef zeroext i1 @_ZN9__gnu_cxxneIP8BuildingSt6vectorIS1_SaIS1_EEEEbRKNS_17__normal_iteratorIT_T0_EESB_(ptr noundef nonnull align 8 dereferenceable(8) @it, ptr noundef nonnull align 8 dereferenceable(8) %2) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %2) #4
  br i1 %5, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %1, %.lr.ph
  %.03 = phi i64 [ %19, %.lr.ph ], [ 0, %1 ]
  %6 = call noundef nonnull align 2 dereferenceable(4) ptr @_ZNK9__gnu_cxx17__normal_iteratorIP8BuildingSt6vectorIS1_SaIS1_EEEdeEv(ptr noundef nonnull align 8 dereferenceable(8) @it) #4
  %7 = load i16, ptr %6, align 2, !tbaa !9
  %8 = sext i16 %7 to i32
  %9 = load i16, ptr %0, align 2, !tbaa !9
  %10 = sext i16 %9 to i32
  %11 = sub nsw i32 %8, %10
  %12 = call i32 @llvm.abs.i32(i32 %11, i1 true)
  %13 = call noundef nonnull align 2 dereferenceable(4) ptr @_ZNK9__gnu_cxx17__normal_iteratorIP8BuildingSt6vectorIS1_SaIS1_EEEdeEv(ptr noundef nonnull align 8 dereferenceable(8) @it) #4
  %14 = getelementptr inbounds i8, ptr %13, i64 2
  %15 = load i16, ptr %14, align 2, !tbaa !12
  %16 = sext i16 %15 to i32
  %17 = mul nsw i32 %12, %16
  %18 = sext i32 %17 to i64
  %19 = add nsw i64 %.03, %18
  %20 = call ptr @_ZN9__gnu_cxx17__normal_iteratorIP8BuildingSt6vectorIS1_SaIS1_EEEppEi(ptr noundef nonnull align 8 dereferenceable(8) @it, i32 noundef 0) #4
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %2) #4
  %21 = call ptr @_ZNSt6vectorI8BuildingSaIS0_EE3endEv(ptr noundef nonnull align 8 dereferenceable(24) @Buildings) #4
  store ptr %21, ptr %2, align 8
  %22 = call noundef zeroext i1 @_ZN9__gnu_cxxneIP8BuildingSt6vectorIS1_SaIS1_EEEEbRKNS_17__normal_iteratorIT_T0_EESB_(ptr noundef nonnull align 8 dereferenceable(8) @it, ptr noundef nonnull align 8 dereferenceable(8) %2) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %2) #4
  br i1 %22, label %.lr.ph, label %._crit_edge, !llvm.loop !13

._crit_edge:                                      ; preds = %.lr.ph, %1
  %.0.lcssa = phi i64 [ 0, %1 ], [ %19, %.lr.ph ]
  ret i64 %.0.lcssa
}

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

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNSt6vectorI8BuildingSaIS0_EE5beginEv(ptr noundef nonnull align 8 dereferenceable(24)) local_unnamed_addr #0 align 2

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

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_ZN9__gnu_cxxneIP8BuildingSt6vectorIS1_SaIS1_EEEEbRKNS_17__normal_iteratorIT_T0_EESB_(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNSt6vectorI8BuildingSaIS0_EE3endEv(ptr noundef nonnull align 8 dereferenceable(24)) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 2 dereferenceable(4) ptr @_ZNK9__gnu_cxx17__normal_iteratorIP8BuildingSt6vectorIS1_SaIS1_EEEdeEv(ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i32 @llvm.abs.i32(i32, i1 immarg) #3

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZN9__gnu_cxx17__normal_iteratorIP8BuildingSt6vectorIS1_SaIS1_EEEppEi(ptr noundef nonnull align 8 dereferenceable(8), i32 noundef) local_unnamed_addr #0 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 nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { inlinehint 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 #3 = { mustprogress nocallback nofree nosync nounwind speculatable willreturn memory(none) }
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, !11, i64 0}
!10 = !{!"_ZTS8Building", !11, i64 0, !11, i64 2}
!11 = !{!"short", !7, i64 0}
!12 = !{!10, !11, i64 2}
!13 = distinct !{!13, !14}
!14 = !{!"llvm.loop.mustprogress"}


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