; LLVM IR from buresjan/optim_lbm :: nomad/ext/sgtelib/src/Matrix.ll (ZNK7SGTELIB6Matrix5countEv)

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

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

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef i32 @_ZNK7SGTELIB6Matrix11get_nb_rowsEv(ptr noundef nonnull align 8 dereferenceable(56)) #1 align 2

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef i32 @_ZNK7SGTELIB6Matrix11get_nb_colsEv(ptr noundef nonnull align 8 dereferenceable(56)) #1 align 2

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare double @llvm.fabs.f64(double) #2

; Function Attrs: mustprogress uwtable
define dso_local noundef i32 @_ZNK7SGTELIB6Matrix5countEv(ptr noundef nonnull align 8 dereferenceable(56) %0) #3 align 2 {
  %2 = alloca ptr, align 8
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  store ptr %0, ptr %2, align 8, !tbaa !5
  %8 = load ptr, ptr %2, align 8
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #4
  store i32 0, ptr %3, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #4
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #4
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #4
  %9 = call noundef i32 @_ZNK7SGTELIB6Matrix11get_nb_rowsEv(ptr noundef nonnull align 8 dereferenceable(56) %8)
  store i32 %9, ptr %6, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #4
  %10 = call noundef i32 @_ZNK7SGTELIB6Matrix11get_nb_colsEv(ptr noundef nonnull align 8 dereferenceable(56) %8)
  store i32 %10, ptr %7, align 4, !tbaa !9
  store i32 0, ptr %4, align 4, !tbaa !9
  br label %11

11:                                               ; preds = %41, %1
  %12 = load i32, ptr %4, align 4, !tbaa !9
  %13 = load i32, ptr %6, align 4, !tbaa !9
  %14 = icmp slt i32 %12, %13
  br i1 %14, label %15, label %44

15:                                               ; preds = %11
  store i32 0, ptr %5, align 4, !tbaa !9
  br label %16

16:                                               ; preds = %37, %15
  %17 = load i32, ptr %5, align 4, !tbaa !9
  %18 = load i32, ptr %7, align 4, !tbaa !9
  %19 = icmp slt i32 %17, %18
  br i1 %19, label %20, label %40

20:                                               ; preds = %16
  %21 = getelementptr inbounds %"class.SGTELIB::Matrix", ptr %8, i32 0, i32 4
  %22 = load ptr, ptr %21, align 8, !tbaa !11
  %23 = load i32, ptr %4, align 4, !tbaa !9
  %24 = sext i32 %23 to i64
  %25 = getelementptr inbounds ptr, ptr %22, i64 %24
  %26 = load ptr, ptr %25, align 8, !tbaa !5
  %27 = load i32, ptr %5, align 4, !tbaa !9
  %28 = sext i32 %27 to i64
  %29 = getelementptr inbounds double, ptr %26, i64 %28
  %30 = load double, ptr %29, align 8, !tbaa !16
  %31 = call double @llvm.fabs.f64(double %30)
  %32 = fcmp ogt double %31, 1.000000e-13
  %33 = zext i1 %32 to i64
  %34 = select i1 %32, i32 1, i32 0
  %35 = load i32, ptr %3, align 4, !tbaa !9
  %36 = add nsw i32 %35, %34
  store i32 %36, ptr %3, align 4, !tbaa !9
  br label %37

37:                                               ; preds = %20
  %38 = load i32, ptr %5, align 4, !tbaa !9
  %39 = add nsw i32 %38, 1
  store i32 %39, ptr %5, align 4, !tbaa !9
  br label %16, !llvm.loop !18

40:                                               ; preds = %16
  br label %41

41:                                               ; preds = %40
  %42 = load i32, ptr %4, align 4, !tbaa !9
  %43 = add nsw i32 %42, 1
  store i32 %43, ptr %4, align 4, !tbaa !9
  br label %11, !llvm.loop !20

44:                                               ; preds = %11
  %45 = load i32, ptr %3, align 4, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #4
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #4
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #4
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #4
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #4
  ret i32 %45
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #2 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }
attributes #3 = { 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, !6, i64 48}
!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 = !{!17, !17, i64 0}
!17 = !{!"double", !7, i64 0}
!18 = distinct !{!18, !19}
!19 = !{!"llvm.loop.mustprogress"}
!20 = distinct !{!20, !19}


; 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: inlinehint mustprogress nounwind uwtable
declare dso_local noundef i32 @_ZNK7SGTELIB6Matrix11get_nb_rowsEv(ptr noundef nonnull align 8 dereferenceable(56)) local_unnamed_addr #0 align 2

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef i32 @_ZNK7SGTELIB6Matrix11get_nb_colsEv(ptr noundef nonnull align 8 dereferenceable(56)) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare double @llvm.fabs.f64(double) #1

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef i32 @_ZNK7SGTELIB6Matrix5countEv(ptr noundef nonnull align 8 dereferenceable(56) %0) local_unnamed_addr #2 align 2 {
  %2 = tail call noundef i32 @_ZNK7SGTELIB6Matrix11get_nb_rowsEv(ptr noundef nonnull align 8 dereferenceable(56) %0)
  %3 = tail call noundef i32 @_ZNK7SGTELIB6Matrix11get_nb_colsEv(ptr noundef nonnull align 8 dereferenceable(56) %0)
  %4 = icmp sgt i32 %2, 0
  br i1 %4, label %.preheader.lr.ph, label %._crit_edge16

.preheader.lr.ph:                                 ; preds = %1
  %5 = icmp sgt i32 %3, 0
  %6 = getelementptr inbounds i8, ptr %0, i64 48
  %7 = load ptr, ptr %6, align 8
  br i1 %5, label %.preheader.us.preheader, label %._crit_edge16

.preheader.us.preheader:                          ; preds = %.preheader.lr.ph
  %wide.trip.count23 = zext nneg i32 %2 to i64
  %wide.trip.count = zext nneg i32 %3 to i64
  %min.iters.check = icmp ult i32 %3, 4
  %n.vec = and i64 %wide.trip.count, 2147483644
  %cmp.n = icmp eq i64 %n.vec, %wide.trip.count
  br label %.preheader.us

.preheader.us:                                    ; preds = %.preheader.us.preheader, %._crit_edge.us
  %indvars.iv20 = phi i64 [ 0, %.preheader.us.preheader ], [ %indvars.iv.next21, %._crit_edge.us ]
  %.015.us = phi i32 [ 0, %.preheader.us.preheader ], [ %.lcssa, %._crit_edge.us ]
  %8 = getelementptr inbounds ptr, ptr %7, i64 %indvars.iv20
  %9 = load ptr, ptr %8, align 8, !tbaa !5
  br i1 %min.iters.check, label %scalar.ph.preheader, label %vector.ph

vector.ph:                                        ; preds = %.preheader.us
  %10 = insertelement <2 x i32> <i32 poison, i32 0>, i32 %.015.us, i64 0
  br label %vector.body

vector.body:                                      ; preds = %vector.body, %vector.ph
  %index = phi i64 [ 0, %vector.ph ], [ %index.next, %vector.body ]
  %vec.phi = phi <2 x i32> [ %10, %vector.ph ], [ %19, %vector.body ]
  %vec.phi25 = phi <2 x i32> [ zeroinitializer, %vector.ph ], [ %20, %vector.body ]
  %11 = getelementptr inbounds double, ptr %9, i64 %index
  %12 = getelementptr inbounds i8, ptr %11, i64 16
  %wide.load = load <2 x double>, ptr %11, align 8, !tbaa !9
  %wide.load26 = load <2 x double>, ptr %12, align 8, !tbaa !9
  %13 = tail call <2 x double> @llvm.fabs.v2f64(<2 x double> %wide.load)
  %14 = tail call <2 x double> @llvm.fabs.v2f64(<2 x double> %wide.load26)
  %15 = fcmp ogt <2 x double> %13, <double 1.000000e-13, double 1.000000e-13>
  %16 = fcmp ogt <2 x double> %14, <double 1.000000e-13, double 1.000000e-13>
  %17 = zext <2 x i1> %15 to <2 x i32>
  %18 = zext <2 x i1> %16 to <2 x i32>
  %19 = add <2 x i32> %vec.phi, %17
  %20 = add <2 x i32> %vec.phi25, %18
  %index.next = add nuw i64 %index, 4
  %21 = icmp eq i64 %index.next, %n.vec
  br i1 %21, label %middle.block, label %vector.body, !llvm.loop !11

middle.block:                                     ; preds = %vector.body
  %bin.rdx = add <2 x i32> %20, %19
  %22 = tail call i32 @llvm.vector.reduce.add.v2i32(<2 x i32> %bin.rdx)
  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 ]
  %.113.us.ph = phi i32 [ %.015.us, %.preheader.us ], [ %22, %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 ]
  %.113.us = phi i32 [ %28, %scalar.ph ], [ %.113.us.ph, %scalar.ph.preheader ]
  %23 = getelementptr inbounds double, ptr %9, i64 %indvars.iv
  %24 = load double, ptr %23, align 8, !tbaa !9
  %25 = tail call double @llvm.fabs.f64(double %24)
  %26 = fcmp ogt double %25, 1.000000e-13
  %27 = zext i1 %26 to i32
  %28 = add nsw i32 %.113.us, %27
  %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 !15

._crit_edge.us:                                   ; preds = %scalar.ph, %middle.block
  %.lcssa = phi i32 [ %22, %middle.block ], [ %28, %scalar.ph ]
  %indvars.iv.next21 = add nuw nsw i64 %indvars.iv20, 1
  %exitcond24.not = icmp eq i64 %indvars.iv.next21, %wide.trip.count23
  br i1 %exitcond24.not, label %._crit_edge16, label %.preheader.us, !llvm.loop !16

._crit_edge16:                                    ; preds = %._crit_edge.us, %.preheader.lr.ph, %1
  %.0.lcssa = phi i32 [ 0, %1 ], [ 0, %.preheader.lr.ph ], [ %.lcssa, %._crit_edge.us ]
  ret i32 %.0.lcssa
}

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare <2 x double> @llvm.fabs.v2f64(<2 x double>) #3

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i32 @llvm.vector.reduce.add.v2i32(<2 x i32>) #3

attributes #0 = { 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 #1 = { mustprogress nocallback nofree nosync nounwind speculatable willreturn memory(none) }
attributes #2 = { 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 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }

!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 = !{!"double", !7, i64 0}
!11 = distinct !{!11, !12, !13, !14}
!12 = !{!"llvm.loop.mustprogress"}
!13 = !{!"llvm.loop.isvectorized", i32 1}
!14 = !{!"llvm.loop.unroll.runtime.disable"}
!15 = distinct !{!15, !12, !14, !13}
!16 = distinct !{!16, !12}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LICMPass,LoopInstSimplifyPass,LoopLoadEliminationPass,LoopRotatePass,LoopSimplifyCFGPass,LoopSimplifyPass,LoopUnrollPass,LoopVectorizePass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass