; LLVM IR from buresjan/optim_lbm :: nomad/ext/sgtelib/src/Matrix.ll (ZN7SGTELIB6Matrix4fillEd)

; 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: mustprogress nounwind uwtable
define dso_local void @_ZN7SGTELIB6Matrix4fillEd(ptr noundef nonnull align 8 dereferenceable(56) %0, double noundef %1) #1 align 2 {
  %3 = alloca ptr, align 8
  %4 = alloca double, align 8
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  store double %1, ptr %4, align 8, !tbaa !9
  %7 = load ptr, ptr %3, align 8
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #2
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #2
  store i32 0, ptr %5, align 4, !tbaa !11
  br label %8

8:                                                ; preds = %34, %2
  %9 = load i32, ptr %5, align 4, !tbaa !11
  %10 = getelementptr inbounds %"class.SGTELIB::Matrix", ptr %7, i32 0, i32 2
  %11 = load i32, ptr %10, align 8, !tbaa !13
  %12 = icmp slt i32 %9, %11
  br i1 %12, label %13, label %37

13:                                               ; preds = %8
  store i32 0, ptr %6, align 4, !tbaa !11
  br label %14

14:                                               ; preds = %30, %13
  %15 = load i32, ptr %6, align 4, !tbaa !11
  %16 = getelementptr inbounds %"class.SGTELIB::Matrix", ptr %7, i32 0, i32 3
  %17 = load i32, ptr %16, align 4, !tbaa !18
  %18 = icmp slt i32 %15, %17
  br i1 %18, label %19, label %33

19:                                               ; preds = %14
  %20 = load double, ptr %4, align 8, !tbaa !9
  %21 = getelementptr inbounds %"class.SGTELIB::Matrix", ptr %7, i32 0, i32 4
  %22 = load ptr, ptr %21, align 8, !tbaa !19
  %23 = load i32, ptr %5, align 4, !tbaa !11
  %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 %6, align 4, !tbaa !11
  %28 = sext i32 %27 to i64
  %29 = getelementptr inbounds double, ptr %26, i64 %28
  store double %20, ptr %29, align 8, !tbaa !9
  br label %30

30:                                               ; preds = %19
  %31 = load i32, ptr %6, align 4, !tbaa !11
  %32 = add nsw i32 %31, 1
  store i32 %32, ptr %6, align 4, !tbaa !11
  br label %14, !llvm.loop !20

33:                                               ; preds = %14
  br label %34

34:                                               ; preds = %33
  %35 = load i32, ptr %5, align 4, !tbaa !11
  %36 = add nsw i32 %35, 1
  store i32 %36, ptr %5, align 4, !tbaa !11
  br label %8, !llvm.loop !22

37:                                               ; preds = %8
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #2
  ret void
}

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 = { 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 = !{!"double", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"int", !7, i64 0}
!13 = !{!14, !12, i64 40}
!14 = !{!"_ZTSN7SGTELIB6MatrixE", !15, i64 8, !12, i64 40, !12, i64 44, !6, i64 48}
!15 = !{!"_ZTSNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE", !16, i64 0, !17, i64 8, !7, i64 16}
!16 = !{!"_ZTSNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE12_Alloc_hiderE", !6, i64 0}
!17 = !{!"long", !7, i64 0}
!18 = !{!14, !12, i64 44}
!19 = !{!14, !6, i64 48}
!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"

; Function Attrs: mustprogress nofree norecurse nosync nounwind memory(readwrite, inaccessiblemem: none) uwtable
define dso_local void @_ZN7SGTELIB6Matrix4fillEd(ptr nocapture noundef nonnull readonly align 8 dereferenceable(56) %0, double noundef %1) local_unnamed_addr #0 align 2 {
  %3 = getelementptr inbounds i8, ptr %0, i64 40
  %4 = load i32, ptr %3, align 8, !tbaa !5
  %5 = icmp sgt i32 %4, 0
  br i1 %5, label %.preheader.lr.ph, label %._crit_edge10

.preheader.lr.ph:                                 ; preds = %2
  %6 = getelementptr inbounds i8, ptr %0, i64 44
  %7 = load i32, ptr %6, align 4, !tbaa !14
  %8 = icmp sgt i32 %7, 0
  %9 = getelementptr inbounds i8, ptr %0, i64 48
  %10 = load ptr, ptr %9, align 8
  br i1 %8, label %.preheader.us.preheader, label %._crit_edge10

.preheader.us.preheader:                          ; preds = %.preheader.lr.ph
  %wide.trip.count16 = zext nneg i32 %4 to i64
  %wide.trip.count = zext nneg i32 %7 to i64
  %min.iters.check = icmp ult i32 %7, 4
  %n.vec = and i64 %wide.trip.count, 2147483644
  %broadcast.splatinsert = insertelement <2 x double> poison, double %1, i64 0
  %broadcast.splat = shufflevector <2 x double> %broadcast.splatinsert, <2 x double> poison, <2 x i32> zeroinitializer
  %cmp.n = icmp eq i64 %n.vec, %wide.trip.count
  br label %.preheader.us

.preheader.us:                                    ; preds = %.preheader.us.preheader, %._crit_edge.us
  %indvars.iv13 = phi i64 [ 0, %.preheader.us.preheader ], [ %indvars.iv.next14, %._crit_edge.us ]
  %11 = getelementptr inbounds ptr, ptr %10, i64 %indvars.iv13
  %12 = load ptr, ptr %11, 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 ]
  %13 = getelementptr inbounds double, ptr %12, i64 %index
  %14 = getelementptr inbounds i8, ptr %13, i64 16
  store <2 x double> %broadcast.splat, ptr %13, align 8, !tbaa !16
  store <2 x double> %broadcast.splat, ptr %14, align 8, !tbaa !16
  %index.next = add nuw i64 %index, 4
  %15 = icmp eq i64 %index.next, %n.vec
  br i1 %15, 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 ]
  %16 = getelementptr inbounds double, ptr %12, i64 %indvars.iv
  store double %1, ptr %16, 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.next14 = add nuw nsw i64 %indvars.iv13, 1
  %exitcond17.not = icmp eq i64 %indvars.iv.next14, %wide.trip.count16
  br i1 %exitcond17.not, label %._crit_edge10, label %.preheader.us, !llvm.loop !23

._crit_edge10:                                    ; preds = %._crit_edge.us, %.preheader.lr.ph, %2
  ret void
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind memory(readwrite, inaccessiblemem: none) 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" }

!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: GVNPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LICMPass,LoopLoadEliminationPass,LoopRotatePass,LoopSimplifyCFGPass,LoopSimplifyPass,LoopUnrollPass,LoopVectorizePass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass