; LLVM IR from aferikoglou/GenHLSOptimizer :: dataset/rodinia_nw_4_doublebuffer_0/nw.ll (Z11buffer_loadiPcPA512_cS_S1_)

; 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 @_Z11buffer_loadiPcPA512_cS_S1_(i32 noundef %0, ptr noundef %1, ptr noundef %2, ptr noundef %3, ptr noundef %4) #1 {
  %6 = alloca i32, align 4
  %7 = alloca ptr, align 8
  %8 = alloca ptr, align 8
  %9 = alloca ptr, align 8
  %10 = alloca ptr, align 8
  %11 = alloca i32, align 4
  store i32 %0, ptr %6, align 4, !tbaa !5
  store ptr %1, ptr %7, align 8, !tbaa !9
  store ptr %2, ptr %8, align 8, !tbaa !9
  store ptr %3, ptr %9, align 8, !tbaa !9
  store ptr %4, ptr %10, align 8, !tbaa !9
  %12 = load i32, ptr %6, align 4, !tbaa !5
  %13 = icmp ne i32 %12, 0
  br i1 %13, label %14, label %45

14:                                               ; preds = %5
  br label %15

15:                                               ; preds = %14
  call void @llvm.lifetime.start.p0(i64 4, ptr %11) #3
  store i32 0, ptr %11, align 4, !tbaa !5
  br label %16

16:                                               ; preds = %41, %15
  %17 = load i32, ptr %11, align 4, !tbaa !5
  %18 = icmp slt i32 %17, 64
  br i1 %18, label %20, label %19

19:                                               ; preds = %16
  call void @llvm.lifetime.end.p0(i64 4, ptr %11) #3
  br label %44

20:                                               ; preds = %16
  %21 = load ptr, ptr %8, align 8, !tbaa !9
  %22 = load i32, ptr %11, align 4, !tbaa !5
  %23 = sext i32 %22 to i64
  %24 = getelementptr inbounds [512 x i8], ptr %21, i64 %23
  %25 = getelementptr inbounds [512 x i8], ptr %24, i64 0, i64 0
  %26 = load ptr, ptr %7, align 8, !tbaa !9
  %27 = load i32, ptr %11, align 4, !tbaa !5
  %28 = mul nsw i32 %27, 512
  %29 = sext i32 %28 to i64
  %30 = getelementptr inbounds i8, ptr %26, i64 %29
  call void @llvm.memcpy.p0.p0.i64(ptr align 1 %25, ptr align 1 %30, i64 512, i1 false)
  %31 = load ptr, ptr %10, align 8, !tbaa !9
  %32 = load i32, ptr %11, align 4, !tbaa !5
  %33 = sext i32 %32 to i64
  %34 = getelementptr inbounds [512 x i8], ptr %31, i64 %33
  %35 = getelementptr inbounds [512 x i8], ptr %34, i64 0, i64 0
  %36 = load ptr, ptr %9, align 8, !tbaa !9
  %37 = load i32, ptr %11, align 4, !tbaa !5
  %38 = mul nsw i32 %37, 512
  %39 = sext i32 %38 to i64
  %40 = getelementptr inbounds i8, ptr %36, i64 %39
  call void @llvm.memcpy.p0.p0.i64(ptr align 1 %35, ptr align 1 %40, i64 512, i1 false)
  br label %41

41:                                               ; preds = %20
  %42 = load i32, ptr %11, align 4, !tbaa !5
  %43 = add nsw i32 %42, 1
  store i32 %43, ptr %11, align 4, !tbaa !5
  br label %16, !llvm.loop !11

44:                                               ; preds = %19
  br label %45

45:                                               ; preds = %44, %5
  ret void
}

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: readwrite)
declare void @llvm.memcpy.p0.p0.i64(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, i64, i1 immarg) #2

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 = { nocallback nofree nounwind willreturn memory(argmem: readwrite) }
attributes #3 = { 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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"any pointer", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"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(argmem: readwrite) uwtable
define dso_local void @_Z11buffer_loadiPcPA512_cS_S1_(i32 noundef %0, ptr nocapture noundef readonly %1, ptr nocapture noundef writeonly %2, ptr nocapture noundef readonly %3, ptr nocapture noundef writeonly %4) local_unnamed_addr #0 {
  %.not = icmp eq i32 %0, 0
  br i1 %.not, label %.loopexit, label %.preheader

.preheader:                                       ; preds = %5, %.preheader
  %indvars.iv = phi i64 [ %indvars.iv.next.1, %.preheader ], [ 0, %5 ]
  %6 = getelementptr inbounds [512 x i8], ptr %2, i64 %indvars.iv
  %7 = shl nuw nsw i64 %indvars.iv, 9
  %8 = getelementptr inbounds i8, ptr %1, i64 %7
  tail call void @llvm.memcpy.p0.p0.i64(ptr noundef nonnull align 1 dereferenceable(512) %6, ptr noundef nonnull align 1 dereferenceable(512) %8, i64 512, i1 false)
  %9 = getelementptr inbounds [512 x i8], ptr %4, i64 %indvars.iv
  %10 = getelementptr inbounds i8, ptr %3, i64 %7
  tail call void @llvm.memcpy.p0.p0.i64(ptr noundef nonnull align 1 dereferenceable(512) %9, ptr noundef nonnull align 1 dereferenceable(512) %10, i64 512, i1 false)
  %indvars.iv.next = or disjoint i64 %indvars.iv, 1
  %11 = getelementptr inbounds [512 x i8], ptr %2, i64 %indvars.iv.next
  %12 = shl nuw nsw i64 %indvars.iv.next, 9
  %13 = getelementptr inbounds i8, ptr %1, i64 %12
  tail call void @llvm.memcpy.p0.p0.i64(ptr noundef nonnull align 1 dereferenceable(512) %11, ptr noundef nonnull align 1 dereferenceable(512) %13, i64 512, i1 false)
  %14 = getelementptr inbounds [512 x i8], ptr %4, i64 %indvars.iv.next
  %15 = getelementptr inbounds i8, ptr %3, i64 %12
  tail call void @llvm.memcpy.p0.p0.i64(ptr noundef nonnull align 1 dereferenceable(512) %14, ptr noundef nonnull align 1 dereferenceable(512) %15, i64 512, i1 false)
  %indvars.iv.next.1 = add nuw nsw i64 %indvars.iv, 2
  %exitcond.not.1 = icmp eq i64 %indvars.iv.next.1, 64
  br i1 %exitcond.not.1, label %.loopexit, label %.preheader, !llvm.loop !5

.loopexit:                                        ; preds = %.preheader, %5
  ret void
}

; Function Attrs: mustprogress nocallback nofree nounwind willreturn memory(argmem: readwrite)
declare void @llvm.memcpy.p0.p0.i64(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, i64, i1 immarg) #1

attributes #0 = { mustprogress nofree norecurse nosync nounwind memory(argmem: readwrite) 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 nounwind willreturn memory(argmem: readwrite) }

!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 = distinct !{!5, !6}
!6 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass