; LLVM IR from guanzhi/GmSSL :: src (kyber)

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

8:                                                ; preds = %32, %3
  %9 = load i32, ptr %7, align 4, !tbaa !9
  %10 = icmp slt i32 %9, 256
  br i1 %10, label %11, label %35

11:                                               ; preds = %8
  %12 = load ptr, ptr %5, align 8, !tbaa !5
  %13 = load i32, ptr %7, align 4, !tbaa !9
  %14 = sext i32 %13 to i64
  %15 = getelementptr inbounds i16, ptr %12, i64 %14
  %16 = load i16, ptr %15, align 2, !tbaa !11
  %17 = sext i16 %16 to i32
  %18 = add nsw i32 %17, 3329
  %19 = load ptr, ptr %6, align 8, !tbaa !5
  %20 = load i32, ptr %7, align 4, !tbaa !9
  %21 = sext i32 %20 to i64
  %22 = getelementptr inbounds i16, ptr %19, i64 %21
  %23 = load i16, ptr %22, align 2, !tbaa !11
  %24 = sext i16 %23 to i32
  %25 = sub nsw i32 %18, %24
  %26 = srem i32 %25, 3329
  %27 = trunc i32 %26 to i16
  %28 = load ptr, ptr %4, align 8, !tbaa !5
  %29 = load i32, ptr %7, align 4, !tbaa !9
  %30 = sext i32 %29 to i64
  %31 = getelementptr inbounds i16, ptr %28, i64 %30
  store i16 %27, ptr %31, align 2, !tbaa !11
  br label %32

32:                                               ; preds = %11
  %33 = load i32, ptr %7, align 4, !tbaa !9
  %34 = add nsw i32 %33, 1
  store i32 %34, ptr %7, align 4, !tbaa !9
  br label %8, !llvm.loop !13

35:                                               ; preds = %8
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #2
  ret void
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"short", !7, i64 0}
!13 = distinct !{!13, !14}
!14 = !{!"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: nofree norecurse nosync nounwind memory(argmem: readwrite) uwtable
define dso_local void @kyber_poly_sub(ptr nocapture noundef writeonly %0, ptr nocapture noundef readonly %1, ptr nocapture noundef readonly %2) local_unnamed_addr #0 {
vector.memcheck:
  %3 = ptrtoint ptr %0 to i64
  %4 = ptrtoint ptr %1 to i64
  %5 = ptrtoint ptr %2 to i64
  %6 = sub i64 %3, %4
  %diff.check = icmp ult i64 %6, 16
  %7 = sub i64 %3, %5
  %diff.check9 = icmp ult i64 %7, 16
  %conflict.rdx = or i1 %diff.check, %diff.check9
  br i1 %conflict.rdx, label %scalar.ph, label %vector.body

vector.body:                                      ; preds = %vector.memcheck, %vector.body
  %index = phi i64 [ %index.next, %vector.body ], [ 0, %vector.memcheck ]
  %8 = getelementptr inbounds i16, ptr %1, i64 %index
  %wide.load = load <8 x i16>, ptr %8, align 2, !tbaa !5
  %9 = sext <8 x i16> %wide.load to <8 x i32>
  %10 = add nsw <8 x i32> %9, <i32 3329, i32 3329, i32 3329, i32 3329, i32 3329, i32 3329, i32 3329, i32 3329>
  %11 = getelementptr inbounds i16, ptr %2, i64 %index
  %wide.load10 = load <8 x i16>, ptr %11, align 2, !tbaa !5
  %12 = sext <8 x i16> %wide.load10 to <8 x i32>
  %13 = sub nsw <8 x i32> %10, %12
  %14 = srem <8 x i32> %13, <i32 3329, i32 3329, i32 3329, i32 3329, i32 3329, i32 3329, i32 3329, i32 3329>
  %15 = trunc nsw <8 x i32> %14 to <8 x i16>
  %16 = getelementptr inbounds i16, ptr %0, i64 %index
  store <8 x i16> %15, ptr %16, align 2, !tbaa !5
  %index.next = add nuw i64 %index, 8
  %17 = icmp eq i64 %index.next, 256
  br i1 %17, label %middle.block, label %vector.body, !llvm.loop !9

scalar.ph:                                        ; preds = %vector.memcheck, %scalar.ph
  %indvars.iv = phi i64 [ %indvars.iv.next.1, %scalar.ph ], [ 0, %vector.memcheck ]
  %18 = getelementptr inbounds i16, ptr %1, i64 %indvars.iv
  %19 = load i16, ptr %18, align 2, !tbaa !5
  %20 = sext i16 %19 to i32
  %21 = add nsw i32 %20, 3329
  %22 = getelementptr inbounds i16, ptr %2, i64 %indvars.iv
  %23 = load i16, ptr %22, align 2, !tbaa !5
  %24 = sext i16 %23 to i32
  %25 = sub nsw i32 %21, %24
  %26 = srem i32 %25, 3329
  %27 = trunc nsw i32 %26 to i16
  %28 = getelementptr inbounds i16, ptr %0, i64 %indvars.iv
  store i16 %27, ptr %28, align 2, !tbaa !5
  %indvars.iv.next = or disjoint i64 %indvars.iv, 1
  %29 = getelementptr inbounds i16, ptr %1, i64 %indvars.iv.next
  %30 = load i16, ptr %29, align 2, !tbaa !5
  %31 = sext i16 %30 to i32
  %32 = add nsw i32 %31, 3329
  %33 = getelementptr inbounds i16, ptr %2, i64 %indvars.iv.next
  %34 = load i16, ptr %33, align 2, !tbaa !5
  %35 = sext i16 %34 to i32
  %36 = sub nsw i32 %32, %35
  %37 = srem i32 %36, 3329
  %38 = trunc nsw i32 %37 to i16
  %39 = getelementptr inbounds i16, ptr %0, i64 %indvars.iv.next
  store i16 %38, ptr %39, align 2, !tbaa !5
  %indvars.iv.next.1 = add nuw nsw i64 %indvars.iv, 2
  %exitcond.not.1 = icmp eq i64 %indvars.iv.next.1, 256
  br i1 %exitcond.not.1, label %middle.block, label %scalar.ph, !llvm.loop !13

middle.block:                                     ; preds = %vector.body, %scalar.ph
  ret void
}

attributes #0 = { 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" }

!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 = !{!"short", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = distinct !{!9, !10, !11, !12}
!10 = !{!"llvm.loop.mustprogress"}
!11 = !{!"llvm.loop.isvectorized", i32 1}
!12 = !{!"llvm.loop.unroll.runtime.disable"}
!13 = distinct !{!13, !10, !11}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,LoopLoadEliminationPass,LoopRotatePass,LoopUnrollPass,LoopVectorizePass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass