; LLVM IR from mobile-algorithm-optimization/guide :: OpenCLGaussian/main.ll (Z8DataInitPhii)

; 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"

; 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 @_Z8DataInitPhii(ptr noundef %0, i32 noundef %1, i32 noundef %2) #1 {
  %4 = alloca ptr, align 8
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca i8, align 1
  %8 = alloca i32, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store i32 %1, ptr %5, align 4, !tbaa !9
  store i32 %2, ptr %6, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 1, ptr %7) #2
  store i8 0, ptr %7, align 1, !tbaa !11
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #2
  store i32 0, ptr %8, align 4, !tbaa !9
  br label %9

9:                                                ; preds = %23, %3
  %10 = load i32, ptr %8, align 4, !tbaa !9
  %11 = load i32, ptr %5, align 4, !tbaa !9
  %12 = load i32, ptr %6, align 4, !tbaa !9
  %13 = mul nsw i32 %11, %12
  %14 = icmp slt i32 %10, %13
  br i1 %14, label %16, label %15

15:                                               ; preds = %9
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #2
  br label %26

16:                                               ; preds = %9
  %17 = load i8, ptr %7, align 1, !tbaa !11
  %18 = load ptr, ptr %4, align 8, !tbaa !5
  store i8 %17, ptr %18, align 1, !tbaa !11
  %19 = load i8, ptr %7, align 1, !tbaa !11
  %20 = add i8 %19, 1
  store i8 %20, ptr %7, align 1, !tbaa !11
  %21 = load ptr, ptr %4, align 8, !tbaa !5
  %22 = getelementptr inbounds i8, ptr %21, i32 1
  store ptr %22, ptr %4, align 8, !tbaa !5
  br label %23

23:                                               ; preds = %16
  %24 = load i32, ptr %8, align 4, !tbaa !9
  %25 = add nsw i32 %24, 1
  store i32 %25, ptr %8, align 4, !tbaa !9
  br label %9, !llvm.loop !12

26:                                               ; preds = %15
  call void @llvm.lifetime.end.p0(i64 1, ptr %7) #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 = !{!"int", !7, i64 0}
!11 = !{!7, !7, i64 0}
!12 = distinct !{!12, !13}
!13 = !{!"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, inaccessiblemem: none) uwtable
define dso_local void @_Z8DataInitPhii(ptr nocapture noundef writeonly %0, i32 noundef %1, i32 noundef %2) local_unnamed_addr #0 {
  %4 = mul nsw i32 %2, %1
  %5 = icmp sgt i32 %4, 0
  br i1 %5, label %iter.check, label %._crit_edge

iter.check:                                       ; preds = %3
  %6 = zext nneg i32 %4 to i64
  %min.iters.check = icmp ult i32 %4, 8
  br i1 %min.iters.check, label %.lr.ph.preheader, label %vector.main.loop.iter.check

vector.main.loop.iter.check:                      ; preds = %iter.check
  %min.iters.check13 = icmp ult i32 %4, 32
  br i1 %min.iters.check13, label %vec.epilog.ph, label %vector.ph

vector.ph:                                        ; preds = %vector.main.loop.iter.check
  %n.vec = and i64 %6, 2147483616
  %ind.end = trunc i64 %n.vec to i8
  br label %vector.body

vector.body:                                      ; preds = %vector.body, %vector.ph
  %index = phi i64 [ 0, %vector.ph ], [ %index.next, %vector.body ]
  %vec.ind = phi <16 x i8> [ <i8 0, i8 1, i8 2, i8 3, i8 4, i8 5, i8 6, i8 7, i8 8, i8 9, i8 10, i8 11, i8 12, i8 13, i8 14, i8 15>, %vector.ph ], [ %vec.ind.next, %vector.body ]
  %step.add = add <16 x i8> %vec.ind, <i8 16, i8 16, i8 16, i8 16, i8 16, i8 16, i8 16, i8 16, i8 16, i8 16, i8 16, i8 16, i8 16, i8 16, i8 16, i8 16>
  %next.gep = getelementptr i8, ptr %0, i64 %index
  %7 = getelementptr i8, ptr %next.gep, i64 16
  store <16 x i8> %vec.ind, ptr %next.gep, align 1, !tbaa !5
  store <16 x i8> %step.add, ptr %7, align 1, !tbaa !5
  %index.next = add nuw i64 %index, 32
  %vec.ind.next = add <16 x i8> %vec.ind, <i8 32, i8 32, i8 32, i8 32, i8 32, i8 32, i8 32, i8 32, i8 32, i8 32, i8 32, i8 32, i8 32, i8 32, i8 32, i8 32>
  %8 = icmp eq i64 %index.next, %n.vec
  br i1 %8, label %middle.block, label %vector.body, !llvm.loop !8

middle.block:                                     ; preds = %vector.body
  %cmp.n = icmp eq i64 %n.vec, %6
  br i1 %cmp.n, label %._crit_edge, label %vec.epilog.iter.check

vec.epilog.iter.check:                            ; preds = %middle.block
  %ind.end22 = getelementptr i8, ptr %0, i64 %n.vec
  %ind.end19 = trunc nuw nsw i64 %n.vec to i32
  %n.vec.remaining = and i64 %6, 24
  %min.epilog.iters.check = icmp eq i64 %n.vec.remaining, 0
  br i1 %min.epilog.iters.check, label %.lr.ph.preheader, label %vec.epilog.ph

.lr.ph.preheader:                                 ; preds = %vec.epilog.middle.block, %iter.check, %vec.epilog.iter.check
  %.011.ph = phi i32 [ 0, %iter.check ], [ %ind.end19, %vec.epilog.iter.check ], [ %ind.end18, %vec.epilog.middle.block ]
  %.089.ph = phi ptr [ %0, %iter.check ], [ %ind.end22, %vec.epilog.iter.check ], [ %ind.end21, %vec.epilog.middle.block ]
  br label %.lr.ph

vec.epilog.ph:                                    ; preds = %vector.main.loop.iter.check, %vec.epilog.iter.check
  %bc.resume.val = phi i8 [ %ind.end, %vec.epilog.iter.check ], [ 0, %vector.main.loop.iter.check ]
  %vec.epilog.resume.val = phi i64 [ %n.vec, %vec.epilog.iter.check ], [ 0, %vector.main.loop.iter.check ]
  %n.vec17 = and i64 %6, 2147483640
  %ind.end18 = trunc nuw nsw i64 %n.vec17 to i32
  %ind.end21 = getelementptr i8, ptr %0, i64 %n.vec17
  %.splatinsert = insertelement <8 x i8> poison, i8 %bc.resume.val, i64 0
  %.splat = shufflevector <8 x i8> %.splatinsert, <8 x i8> poison, <8 x i32> zeroinitializer
  %induction = add <8 x i8> %.splat, <i8 0, i8 1, i8 2, i8 3, i8 4, i8 5, i8 6, i8 7>
  br label %vec.epilog.vector.body

vec.epilog.vector.body:                           ; preds = %vec.epilog.vector.body, %vec.epilog.ph
  %index24 = phi i64 [ %vec.epilog.resume.val, %vec.epilog.ph ], [ %index.next29, %vec.epilog.vector.body ]
  %vec.ind25 = phi <8 x i8> [ %induction, %vec.epilog.ph ], [ %vec.ind.next27, %vec.epilog.vector.body ]
  %next.gep28 = getelementptr i8, ptr %0, i64 %index24
  store <8 x i8> %vec.ind25, ptr %next.gep28, align 1, !tbaa !5
  %index.next29 = add nuw i64 %index24, 8
  %vec.ind.next27 = add <8 x i8> %vec.ind25, <i8 8, i8 8, i8 8, i8 8, i8 8, i8 8, i8 8, i8 8>
  %9 = icmp eq i64 %index.next29, %n.vec17
  br i1 %9, label %vec.epilog.middle.block, label %vec.epilog.vector.body, !llvm.loop !12

vec.epilog.middle.block:                          ; preds = %vec.epilog.vector.body
  %cmp.n30 = icmp eq i64 %n.vec17, %6
  br i1 %cmp.n30, label %._crit_edge, label %.lr.ph.preheader

._crit_edge:                                      ; preds = %.lr.ph, %middle.block, %vec.epilog.middle.block, %3
  ret void

.lr.ph:                                           ; preds = %.lr.ph.preheader, %.lr.ph
  %.011 = phi i32 [ %10, %.lr.ph ], [ %.011.ph, %.lr.ph.preheader ]
  %.089 = phi ptr [ %11, %.lr.ph ], [ %.089.ph, %.lr.ph.preheader ]
  %indvars12 = trunc i32 %.011 to i8
  store i8 %indvars12, ptr %.089, align 1, !tbaa !5
  %10 = add nuw nsw i32 %.011, 1
  %11 = getelementptr inbounds i8, ptr %.089, i64 1
  %exitcond.not = icmp eq i32 %10, %4
  br i1 %exitcond.not, label %._crit_edge, label %.lr.ph, !llvm.loop !13
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind memory(write, 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, !6, i64 0}
!6 = !{!"omnipotent char", !7, i64 0}
!7 = !{!"Simple C++ TBAA"}
!8 = distinct !{!8, !9, !10, !11}
!9 = !{!"llvm.loop.mustprogress"}
!10 = !{!"llvm.loop.isvectorized", i32 1}
!11 = !{!"llvm.loop.unroll.runtime.disable"}
!12 = distinct !{!12, !9, !10, !11}
!13 = distinct !{!13, !9, !11, !10}


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