; 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 i32 @kyber_poly_equ(ptr noundef %0, ptr noundef %1) #1 {
  %3 = alloca i32, align 4
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store ptr %1, 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 !9
  br label %8

8:                                                ; preds = %27, %2
  %9 = load i32, ptr %6, align 4, !tbaa !9
  %10 = icmp slt i32 %9, 256
  br i1 %10, label %11, label %30

11:                                               ; preds = %8
  %12 = load ptr, ptr %4, align 8, !tbaa !5
  %13 = load i32, ptr %6, 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 = load ptr, ptr %5, align 8, !tbaa !5
  %19 = load i32, ptr %6, align 4, !tbaa !9
  %20 = sext i32 %19 to i64
  %21 = getelementptr inbounds i16, ptr %18, i64 %20
  %22 = load i16, ptr %21, align 2, !tbaa !11
  %23 = sext i16 %22 to i32
  %24 = icmp ne i32 %17, %23
  br i1 %24, label %25, label %26

25:                                               ; preds = %11
  store i32 0, ptr %3, align 4
  store i32 1, ptr %7, align 4
  br label %31

26:                                               ; preds = %11
  br label %27

27:                                               ; preds = %26
  %28 = load i32, ptr %6, align 4, !tbaa !9
  %29 = add nsw i32 %28, 1
  store i32 %29, ptr %6, align 4, !tbaa !9
  br label %8, !llvm.loop !13

30:                                               ; preds = %8
  store i32 1, ptr %3, align 4
  store i32 1, ptr %7, align 4
  br label %31

31:                                               ; preds = %30, %25
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #2
  %32 = load i32, ptr %3, align 4
  ret i32 %32
}

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: read) uwtable
define dso_local range(i32 0, 2) i32 @kyber_poly_equ(ptr nocapture noundef readonly %0, ptr nocapture noundef readonly %1) local_unnamed_addr #0 {
  br label %19

3:                                                ; preds = %19
  %indvars.iv.next = or disjoint i64 %indvars.iv, 1
  %4 = getelementptr inbounds i16, ptr %0, i64 %indvars.iv.next
  %5 = load i16, ptr %4, align 2, !tbaa !5
  %6 = getelementptr inbounds i16, ptr %1, i64 %indvars.iv.next
  %7 = load i16, ptr %6, align 2, !tbaa !5
  %.not.1 = icmp eq i16 %5, %7
  br i1 %.not.1, label %8, label %24

8:                                                ; preds = %3
  %indvars.iv.next.1 = or disjoint i64 %indvars.iv, 2
  %9 = getelementptr inbounds i16, ptr %0, i64 %indvars.iv.next.1
  %10 = load i16, ptr %9, align 2, !tbaa !5
  %11 = getelementptr inbounds i16, ptr %1, i64 %indvars.iv.next.1
  %12 = load i16, ptr %11, align 2, !tbaa !5
  %.not.2 = icmp eq i16 %10, %12
  br i1 %.not.2, label %13, label %24

13:                                               ; preds = %8
  %indvars.iv.next.2 = or disjoint i64 %indvars.iv, 3
  %14 = getelementptr inbounds i16, ptr %0, i64 %indvars.iv.next.2
  %15 = load i16, ptr %14, align 2, !tbaa !5
  %16 = getelementptr inbounds i16, ptr %1, i64 %indvars.iv.next.2
  %17 = load i16, ptr %16, align 2, !tbaa !5
  %.not.3 = icmp eq i16 %15, %17
  br i1 %.not.3, label %18, label %24

18:                                               ; preds = %13
  %indvars.iv.next.3 = add nuw nsw i64 %indvars.iv, 4
  %exitcond.not.3 = icmp eq i64 %indvars.iv.next.3, 256
  br i1 %exitcond.not.3, label %24, label %19, !llvm.loop !9

19:                                               ; preds = %18, %2
  %indvars.iv = phi i64 [ 0, %2 ], [ %indvars.iv.next.3, %18 ]
  %20 = getelementptr inbounds i16, ptr %0, i64 %indvars.iv
  %21 = load i16, ptr %20, align 2, !tbaa !5
  %22 = getelementptr inbounds i16, ptr %1, i64 %indvars.iv
  %23 = load i16, ptr %22, align 2, !tbaa !5
  %.not = icmp eq i16 %21, %23
  br i1 %.not, label %3, label %24

24:                                               ; preds = %18, %13, %8, %3, %19
  %.06 = phi i32 [ 0, %19 ], [ 0, %3 ], [ 0, %8 ], [ 0, %13 ], [ 1, %18 ]
  ret i32 %.06
}

attributes #0 = { nofree norecurse nosync nounwind memory(argmem: read) 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}
!10 = !{!"llvm.loop.mustprogress"}


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