; LLVM IR from niessner/Matterport :: code/gaps/pkgs/R3Shapes/R3Grid.ll (ZN6R3Grid5ClearEd)

; 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.R3Grid = type { %class.R3Affine, %class.R3Affine, double, double, ptr, [3 x i32], i32, i32, i32 }
%class.R3Affine = type { %class.R3Transformation, %class.R4Matrix, %class.R4Matrix, %class.RNFlags }
%class.R3Transformation = type { ptr }
%class.R4Matrix = type { [4 x [4 x double]] }
%class.RNFlags = type { i64 }

; 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 @_ZN6R3Grid5ClearEd(ptr noundef nonnull align 8 dereferenceable(592) %0, double noundef %1) #1 align 2 {
  %3 = alloca ptr, align 8
  %4 = alloca double, align 8
  %5 = alloca ptr, align 8
  %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 8, ptr %5) #2
  %8 = getelementptr inbounds %class.R3Grid, ptr %7, i32 0, i32 4
  %9 = load ptr, ptr %8, align 8, !tbaa !11
  store ptr %9, ptr %5, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #2
  store i32 0, ptr %6, align 4, !tbaa !19
  br label %10

10:                                               ; preds = %20, %2
  %11 = load i32, ptr %6, align 4, !tbaa !19
  %12 = getelementptr inbounds %class.R3Grid, ptr %7, i32 0, i32 8
  %13 = load i32, ptr %12, align 4, !tbaa !20
  %14 = icmp slt i32 %11, %13
  br i1 %14, label %16, label %15

15:                                               ; preds = %10
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #2
  br label %23

16:                                               ; preds = %10
  %17 = load double, ptr %4, align 8, !tbaa !9
  %18 = load ptr, ptr %5, align 8, !tbaa !5
  %19 = getelementptr inbounds double, ptr %18, i32 1
  store ptr %19, ptr %5, align 8, !tbaa !5
  store double %17, ptr %18, align 8, !tbaa !9
  br label %20

20:                                               ; preds = %16
  %21 = load i32, ptr %6, align 4, !tbaa !19
  %22 = add nsw i32 %21, 1
  store i32 %22, ptr %6, align 4, !tbaa !19
  br label %10, !llvm.loop !21

23:                                               ; preds = %15
  call void @llvm.lifetime.end.p0(i64 8, 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, !6, i64 560}
!12 = !{!"_ZTS6R3Grid", !13, i64 0, !13, i64 272, !10, i64 544, !10, i64 552, !6, i64 560, !7, i64 568, !18, i64 580, !18, i64 584, !18, i64 588}
!13 = !{!"_ZTS8R3Affine", !14, i64 0, !15, i64 8, !15, i64 136, !16, i64 264}
!14 = !{!"_ZTS16R3Transformation"}
!15 = !{!"_ZTS8R4Matrix", !7, i64 0}
!16 = !{!"_ZTS7RNFlags", !17, i64 0}
!17 = !{!"long", !7, i64 0}
!18 = !{!"int", !7, i64 0}
!19 = !{!18, !18, i64 0}
!20 = !{!12, !18, i64 588}
!21 = distinct !{!21, !22}
!22 = !{!"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"

; Function Attrs: mustprogress nofree norecurse nosync nounwind memory(write, argmem: readwrite, inaccessiblemem: none) uwtable
define dso_local void @_ZN6R3Grid5ClearEd(ptr nocapture noundef nonnull readonly align 8 dereferenceable(592) %0, double noundef %1) local_unnamed_addr #0 align 2 {
  %3 = getelementptr inbounds i8, ptr %0, i64 588
  %4 = load i32, ptr %3, align 4, !tbaa !5
  %5 = icmp sgt i32 %4, 0
  br i1 %5, label %.lr.ph.preheader, label %._crit_edge

.lr.ph.preheader:                                 ; preds = %2
  %6 = getelementptr inbounds i8, ptr %0, i64 560
  %7 = load ptr, ptr %6, align 8, !tbaa !17
  %8 = zext nneg i32 %4 to i64
  %min.iters.check = icmp ult i32 %4, 4
  br i1 %min.iters.check, label %.lr.ph.preheader10, label %vector.ph

.lr.ph.preheader10:                               ; preds = %middle.block, %.lr.ph.preheader
  %.06.ph = phi i32 [ 0, %.lr.ph.preheader ], [ %ind.end, %middle.block ]
  %.045.ph = phi ptr [ %7, %.lr.ph.preheader ], [ %ind.end7, %middle.block ]
  br label %.lr.ph

vector.ph:                                        ; preds = %.lr.ph.preheader
  %n.vec = and i64 %8, 2147483644
  %ind.end = trunc nuw nsw i64 %n.vec to i32
  %9 = shl nuw nsw i64 %n.vec, 3
  %ind.end7 = getelementptr i8, ptr %7, i64 %9
  %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
  br label %vector.body

vector.body:                                      ; preds = %vector.body, %vector.ph
  %index = phi i64 [ 0, %vector.ph ], [ %index.next, %vector.body ]
  %offset.idx = shl i64 %index, 3
  %next.gep = getelementptr i8, ptr %7, i64 %offset.idx
  %10 = getelementptr i8, ptr %next.gep, i64 16
  store <2 x double> %broadcast.splat, ptr %next.gep, align 8, !tbaa !18
  store <2 x double> %broadcast.splat, ptr %10, align 8, !tbaa !18
  %index.next = add nuw i64 %index, 4
  %11 = icmp eq i64 %index.next, %n.vec
  br i1 %11, label %middle.block, label %vector.body, !llvm.loop !19

middle.block:                                     ; preds = %vector.body
  %cmp.n = icmp eq i64 %n.vec, %8
  br i1 %cmp.n, label %._crit_edge, label %.lr.ph.preheader10

._crit_edge:                                      ; preds = %.lr.ph, %middle.block, %2
  ret void

.lr.ph:                                           ; preds = %.lr.ph.preheader10, %.lr.ph
  %.06 = phi i32 [ %13, %.lr.ph ], [ %.06.ph, %.lr.ph.preheader10 ]
  %.045 = phi ptr [ %12, %.lr.ph ], [ %.045.ph, %.lr.ph.preheader10 ]
  %12 = getelementptr inbounds i8, ptr %.045, i64 8
  store double %1, ptr %.045, align 8, !tbaa !18
  %13 = add nuw nsw i32 %.06, 1
  %exitcond.not = icmp eq i32 %13, %4
  br i1 %exitcond.not, label %._crit_edge, label %.lr.ph, !llvm.loop !23
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind memory(write, argmem: 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, !16, i64 588}
!6 = !{!"_ZTS6R3Grid", !7, i64 0, !7, i64 272, !14, i64 544, !14, i64 552, !15, i64 560, !10, i64 568, !16, i64 580, !16, i64 584, !16, i64 588}
!7 = !{!"_ZTS8R3Affine", !8, i64 0, !9, i64 8, !9, i64 136, !12, i64 264}
!8 = !{!"_ZTS16R3Transformation"}
!9 = !{!"_ZTS8R4Matrix", !10, i64 0}
!10 = !{!"omnipotent char", !11, i64 0}
!11 = !{!"Simple C++ TBAA"}
!12 = !{!"_ZTS7RNFlags", !13, i64 0}
!13 = !{!"long", !10, i64 0}
!14 = !{!"double", !10, i64 0}
!15 = !{!"any pointer", !10, i64 0}
!16 = !{!"int", !10, i64 0}
!17 = !{!6, !15, i64 560}
!18 = !{!14, !14, i64 0}
!19 = distinct !{!19, !20, !21, !22}
!20 = !{!"llvm.loop.mustprogress"}
!21 = !{!"llvm.loop.isvectorized", i32 1}
!22 = !{!"llvm.loop.unroll.runtime.disable"}
!23 = distinct !{!23, !20, !22, !21}


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