; LLVM IR from buresjan/optim_lbm :: nomad/ext/sgtelib/src/Matrix.ll (ZNK7SGTELIB6Matrix7get_rowEi)

; 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.24 = 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: inlinehint mustprogress uwtable
declare dso_local void @_ZStplIcSt11char_traitsIcESaIcEENSt7__cxx1112basic_stringIT_T0_T1_EERKS8_PKS5_(ptr dead_on_unwind noalias writable sret(%"class.std::__cxx11::basic_string") align 8, ptr noundef nonnull align 8 dereferenceable(32), ptr noundef) #2

; Function Attrs: mustprogress uwtable
define dso_local void @_ZNK7SGTELIB6Matrix7get_rowEi(ptr dead_on_unwind noalias writable sret(%"class.SGTELIB::Matrix") align 8 %0, ptr noundef nonnull align 8 dereferenceable(56) %1, i32 noundef %2) #3 align 2 personality ptr @__gxx_personality_v0 {
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  %7 = alloca i1, align 1
  %8 = alloca %"class.std::__cxx11::basic_string", align 8
  %9 = alloca ptr, align 8
  %10 = alloca i32, align 4
  %11 = alloca i32, align 4
  store ptr %0, ptr %4, align 8
  store ptr %1, ptr %5, align 8, !tbaa !5
  store i32 %2, ptr %6, align 4, !tbaa !9
  %12 = load ptr, ptr %5, align 8
  store i1 false, ptr %7, align 1
  call void @llvm.lifetime.start.p0(i64 32, ptr %8) #4
  %13 = getelementptr inbounds %"class.SGTELIB::Matrix", ptr %12, i32 0, i32 1
  call void @_ZStplIcSt11char_traitsIcESaIcEENSt7__cxx1112basic_stringIT_T0_T1_EERKS8_PKS5_(ptr dead_on_unwind writable sret(%"class.std::__cxx11::basic_string") align 8 %8, ptr noundef nonnull align 8 dereferenceable(32) %13, ptr noundef @.str.24)
  %14 = getelementptr inbounds %"class.SGTELIB::Matrix", ptr %12, i32 0, i32 3
  %15 = load i32, ptr %14, align 4, !tbaa !11
  invoke void @_ZN7SGTELIB6MatrixC1ERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEii(ptr noundef nonnull align 8 dereferenceable(56) %0, ptr noundef nonnull align 8 dereferenceable(32) %8, i32 noundef 1, i32 noundef %15)
          to label %16 unwind label %23

16:                                               ; preds = %3
  call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32) %8) #4
  call void @llvm.lifetime.end.p0(i64 32, ptr %8) #4
  call void @llvm.lifetime.start.p0(i64 4, ptr %11) #4
  store i32 0, ptr %11, align 4, !tbaa !9
  br label %17

17:                                               ; preds = %45, %16
  %18 = load i32, ptr %11, align 4, !tbaa !9
  %19 = getelementptr inbounds %"class.SGTELIB::Matrix", ptr %12, i32 0, i32 3
  %20 = load i32, ptr %19, align 4, !tbaa !11
  %21 = icmp slt i32 %18, %20
  br i1 %21, label %27, label %22

22:                                               ; preds = %17
  call void @llvm.lifetime.end.p0(i64 4, ptr %11) #4
  br label %48

23:                                               ; preds = %3
  %24 = landingpad { ptr, i32 }
          cleanup
  %25 = extractvalue { ptr, i32 } %24, 0
  store ptr %25, ptr %9, align 8
  %26 = extractvalue { ptr, i32 } %24, 1
  store i32 %26, ptr %10, align 4
  call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32) %8) #4
  call void @llvm.lifetime.end.p0(i64 32, ptr %8) #4
  br label %52

27:                                               ; preds = %17
  %28 = getelementptr inbounds %"class.SGTELIB::Matrix", ptr %12, i32 0, i32 4
  %29 = load ptr, ptr %28, align 8, !tbaa !16
  %30 = load i32, ptr %6, align 4, !tbaa !9
  %31 = sext i32 %30 to i64
  %32 = getelementptr inbounds ptr, ptr %29, i64 %31
  %33 = load ptr, ptr %32, align 8, !tbaa !5
  %34 = load i32, ptr %11, align 4, !tbaa !9
  %35 = sext i32 %34 to i64
  %36 = getelementptr inbounds double, ptr %33, i64 %35
  %37 = load double, ptr %36, align 8, !tbaa !17
  %38 = getelementptr inbounds %"class.SGTELIB::Matrix", ptr %0, i32 0, i32 4
  %39 = load ptr, ptr %38, align 8, !tbaa !16
  %40 = getelementptr inbounds ptr, ptr %39, i64 0
  %41 = load ptr, ptr %40, align 8, !tbaa !5
  %42 = load i32, ptr %11, align 4, !tbaa !9
  %43 = sext i32 %42 to i64
  %44 = getelementptr inbounds double, ptr %41, i64 %43
  store double %37, ptr %44, align 8, !tbaa !17
  br label %45

45:                                               ; preds = %27
  %46 = load i32, ptr %11, align 4, !tbaa !9
  %47 = add nsw i32 %46, 1
  store i32 %47, ptr %11, align 4, !tbaa !9
  br label %17, !llvm.loop !19

48:                                               ; preds = %22
  store i1 true, ptr %7, align 1
  %49 = load i1, ptr %7, align 1
  br i1 %49, label %51, label %50

50:                                               ; preds = %48
  call void @_ZN7SGTELIB6MatrixD1Ev(ptr noundef nonnull align 8 dereferenceable(56) %0) #4
  br label %51

51:                                               ; preds = %50, %48
  ret void

52:                                               ; preds = %23
  %53 = load ptr, ptr %9, align 8
  %54 = load i32, ptr %10, align 4
  %55 = insertvalue { ptr, i32 } poison, ptr %53, 0
  %56 = insertvalue { ptr, i32 } %55, i32 %54, 1
  resume { ptr, i32 } %56
}

declare void @_ZN7SGTELIB6MatrixC1ERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEii(ptr, ptr, i32, i32)

declare void @_ZN7SGTELIB6MatrixD1Ev(ptr)

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 = { 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 #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, !10, i64 44}
!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, !6, i64 48}
!17 = !{!18, !18, i64 0}
!18 = !{!"double", !7, i64 0}
!19 = distinct !{!19, !20}
!20 = !{!"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::__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.24 = 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: inlinehint mustprogress uwtable
declare dso_local void @_ZStplIcSt11char_traitsIcESaIcEENSt7__cxx1112basic_stringIT_T0_T1_EERKS8_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 #2

; Function Attrs: mustprogress uwtable
define dso_local void @_ZNK7SGTELIB6Matrix7get_rowEi(ptr dead_on_unwind noalias writable sret(%"class.SGTELIB::Matrix") align 8 %0, ptr noundef nonnull align 8 dereferenceable(56) %1, i32 noundef %2) local_unnamed_addr #3 align 2 personality ptr @__gxx_personality_v0 {
  %4 = alloca %"class.std::__cxx11::basic_string", align 8
  call void @llvm.lifetime.start.p0(i64 32, ptr nonnull %4) #4
  %5 = getelementptr inbounds i8, ptr %1, i64 8
  call void @_ZStplIcSt11char_traitsIcESaIcEENSt7__cxx1112basic_stringIT_T0_T1_EERKS8_PKS5_(ptr dead_on_unwind nonnull writable sret(%"class.std::__cxx11::basic_string") align 8 %4, ptr noundef nonnull align 8 dereferenceable(32) %5, ptr noundef nonnull @.str.24)
  %6 = getelementptr inbounds i8, ptr %1, i64 44
  %7 = load i32, ptr %6, align 4, !tbaa !5
  invoke void @_ZN7SGTELIB6MatrixC1ERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEii(ptr noundef nonnull align 8 dereferenceable(56) %0, ptr noundef nonnull align 8 dereferenceable(32) %4, i32 noundef 1, i32 noundef %7)
          to label %8 unwind label %32

8:                                                ; preds = %3
  call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32) %4) #4
  call void @llvm.lifetime.end.p0(i64 32, ptr nonnull %4) #4
  %9 = load i32, ptr %6, align 4, !tbaa !5
  %10 = icmp sgt i32 %9, 0
  br i1 %10, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %8
  %11 = getelementptr inbounds i8, ptr %1, i64 48
  %12 = load ptr, ptr %11, align 8, !tbaa !14
  %13 = sext i32 %2 to i64
  %14 = getelementptr inbounds ptr, ptr %12, i64 %13
  %15 = load ptr, ptr %14, align 8, !tbaa !15
  %16 = getelementptr inbounds i8, ptr %0, i64 48
  %17 = load ptr, ptr %16, align 8, !tbaa !14
  %18 = load ptr, ptr %17, align 8, !tbaa !15
  %wide.trip.count = zext nneg i32 %9 to i64
  %min.iters.check = icmp ult i32 %9, 6
  %19 = ptrtoint ptr %18 to i64
  %20 = ptrtoint ptr %15 to i64
  %21 = sub i64 %19, %20
  %diff.check = icmp ult i64 %21, 32
  %or.cond = select i1 %min.iters.check, i1 true, i1 %diff.check
  br i1 %or.cond, label %scalar.ph.preheader, label %vector.ph

scalar.ph.preheader:                              ; preds = %middle.block, %.lr.ph
  %indvars.iv.ph = phi i64 [ 0, %.lr.ph ], [ %n.vec, %middle.block ]
  %xtraiter = and i64 %wide.trip.count, 3
  %lcmp.mod.not = icmp eq i64 %xtraiter, 0
  br i1 %lcmp.mod.not, label %scalar.ph.prol.loopexit, label %scalar.ph.prol

scalar.ph.prol:                                   ; preds = %scalar.ph.preheader, %scalar.ph.prol
  %indvars.iv.prol = phi i64 [ %indvars.iv.next.prol, %scalar.ph.prol ], [ %indvars.iv.ph, %scalar.ph.preheader ]
  %prol.iter = phi i64 [ %prol.iter.next, %scalar.ph.prol ], [ 0, %scalar.ph.preheader ]
  %22 = getelementptr inbounds double, ptr %15, i64 %indvars.iv.prol
  %23 = load double, ptr %22, align 8, !tbaa !16
  %24 = getelementptr inbounds double, ptr %18, i64 %indvars.iv.prol
  store double %23, ptr %24, align 8, !tbaa !16
  %indvars.iv.next.prol = add nuw nsw i64 %indvars.iv.prol, 1
  %prol.iter.next = add i64 %prol.iter, 1
  %prol.iter.cmp.not = icmp eq i64 %prol.iter.next, %xtraiter
  br i1 %prol.iter.cmp.not, label %scalar.ph.prol.loopexit, label %scalar.ph.prol, !llvm.loop !18

scalar.ph.prol.loopexit:                          ; preds = %scalar.ph.prol, %scalar.ph.preheader
  %indvars.iv.unr = phi i64 [ %indvars.iv.ph, %scalar.ph.preheader ], [ %indvars.iv.next.prol, %scalar.ph.prol ]
  %25 = sub nsw i64 %indvars.iv.ph, %wide.trip.count
  %26 = icmp ugt i64 %25, -4
  br i1 %26, label %._crit_edge, label %scalar.ph

vector.ph:                                        ; preds = %.lr.ph
  %n.vec = and i64 %wide.trip.count, 2147483644
  br label %vector.body

vector.body:                                      ; preds = %vector.body, %vector.ph
  %index = phi i64 [ 0, %vector.ph ], [ %index.next, %vector.body ]
  %27 = getelementptr inbounds double, ptr %15, i64 %index
  %28 = getelementptr inbounds i8, ptr %27, i64 16
  %wide.load = load <2 x double>, ptr %27, align 8, !tbaa !16
  %wide.load10 = load <2 x double>, ptr %28, align 8, !tbaa !16
  %29 = getelementptr inbounds double, ptr %18, i64 %index
  %30 = getelementptr inbounds i8, ptr %29, i64 16
  store <2 x double> %wide.load, ptr %29, align 8, !tbaa !16
  store <2 x double> %wide.load10, ptr %30, align 8, !tbaa !16
  %index.next = add nuw i64 %index, 4
  %31 = icmp eq i64 %index.next, %n.vec
  br i1 %31, label %middle.block, label %vector.body, !llvm.loop !20

middle.block:                                     ; preds = %vector.body
  %cmp.n = icmp eq i64 %n.vec, %wide.trip.count
  br i1 %cmp.n, label %._crit_edge, label %scalar.ph.preheader

32:                                               ; preds = %3
  %33 = landingpad { ptr, i32 }
          cleanup
  call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32) %4) #4
  call void @llvm.lifetime.end.p0(i64 32, ptr nonnull %4) #4
  resume { ptr, i32 } %33

scalar.ph:                                        ; preds = %scalar.ph.prol.loopexit, %scalar.ph
  %indvars.iv = phi i64 [ %indvars.iv.next.3, %scalar.ph ], [ %indvars.iv.unr, %scalar.ph.prol.loopexit ]
  %34 = getelementptr inbounds double, ptr %15, i64 %indvars.iv
  %35 = load double, ptr %34, align 8, !tbaa !16
  %36 = getelementptr inbounds double, ptr %18, i64 %indvars.iv
  store double %35, ptr %36, align 8, !tbaa !16
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %37 = getelementptr inbounds double, ptr %15, i64 %indvars.iv.next
  %38 = load double, ptr %37, align 8, !tbaa !16
  %39 = getelementptr inbounds double, ptr %18, i64 %indvars.iv.next
  store double %38, ptr %39, align 8, !tbaa !16
  %indvars.iv.next.1 = add nuw nsw i64 %indvars.iv, 2
  %40 = getelementptr inbounds double, ptr %15, i64 %indvars.iv.next.1
  %41 = load double, ptr %40, align 8, !tbaa !16
  %42 = getelementptr inbounds double, ptr %18, i64 %indvars.iv.next.1
  store double %41, ptr %42, align 8, !tbaa !16
  %indvars.iv.next.2 = add nuw nsw i64 %indvars.iv, 3
  %43 = getelementptr inbounds double, ptr %15, i64 %indvars.iv.next.2
  %44 = load double, ptr %43, align 8, !tbaa !16
  %45 = getelementptr inbounds double, ptr %18, i64 %indvars.iv.next.2
  store double %44, ptr %45, align 8, !tbaa !16
  %indvars.iv.next.3 = add nuw nsw i64 %indvars.iv, 4
  %exitcond.not.3 = icmp eq i64 %indvars.iv.next.3, %wide.trip.count
  br i1 %exitcond.not.3, label %._crit_edge, label %scalar.ph, !llvm.loop !24

._crit_edge:                                      ; preds = %scalar.ph.prol.loopexit, %scalar.ph, %middle.block, %8
  ret void
}

declare void @_ZN7SGTELIB6MatrixC1ERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEii(ptr, ptr, i32, i32) local_unnamed_addr

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 = { 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 #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, !13, i64 44}
!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, !9, i64 48}
!15 = !{!9, !9, i64 0}
!16 = !{!17, !17, i64 0}
!17 = !{!"double", !10, i64 0}
!18 = distinct !{!18, !19}
!19 = !{!"llvm.loop.unroll.disable"}
!20 = distinct !{!20, !21, !22, !23}
!21 = !{!"llvm.loop.mustprogress"}
!22 = !{!"llvm.loop.isvectorized", i32 1}
!23 = !{!"llvm.loop.unroll.runtime.disable"}
!24 = distinct !{!24, !21, !22}


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