; LLVM IR from libxsmm/libxsmm :: src (libxsmm_math)

; 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"

%union.libxsmm_float_uint = type { float }

; 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: nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #1

; Function Attrs: nounwind uwtable
define dso_local zeroext i16 @libxsmm_convert_f32_to_bf16_rnaz(float noundef %0) #2 {
  %2 = alloca float, align 4
  %3 = alloca %union.libxsmm_float_uint, align 4
  %4 = alloca i16, align 2
  store float %0, ptr %2, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #3
  call void @llvm.memset.p0.i64(ptr align 4 %3, i8 0, i64 4, i1 false)
  call void @llvm.lifetime.start.p0(i64 2, ptr %4) #3
  %5 = load float, ptr %2, align 4, !tbaa !5
  store float %5, ptr %3, align 4, !tbaa !9
  %6 = load i32, ptr %3, align 4, !tbaa !9
  %7 = and i32 %6, 2139095040
  %8 = icmp eq i32 %7, 0
  br i1 %8, label %9, label %12

9:                                                ; preds = %1
  %10 = load i32, ptr %3, align 4, !tbaa !9
  %11 = and i32 %10, -2147483648
  br label %14

12:                                               ; preds = %1
  %13 = load i32, ptr %3, align 4, !tbaa !9
  br label %14

14:                                               ; preds = %12, %9
  %15 = phi i32 [ %11, %9 ], [ %13, %12 ]
  store i32 %15, ptr %3, align 4, !tbaa !9
  %16 = load i32, ptr %3, align 4, !tbaa !9
  %17 = and i32 %16, 2139095040
  %18 = icmp eq i32 %17, 2139095040
  br i1 %18, label %19, label %30

19:                                               ; preds = %14
  %20 = load i32, ptr %3, align 4, !tbaa !9
  %21 = and i32 %20, 8388607
  %22 = icmp eq i32 %21, 0
  br i1 %22, label %23, label %25

23:                                               ; preds = %19
  %24 = load i32, ptr %3, align 4, !tbaa !9
  br label %28

25:                                               ; preds = %19
  %26 = load i32, ptr %3, align 4, !tbaa !9
  %27 = or i32 %26, 4194304
  br label %28

28:                                               ; preds = %25, %23
  %29 = phi i32 [ %24, %23 ], [ %27, %25 ]
  br label %33

30:                                               ; preds = %14
  %31 = load i32, ptr %3, align 4, !tbaa !9
  %32 = add i32 %31, 32768
  br label %33

33:                                               ; preds = %30, %28
  %34 = phi i32 [ %29, %28 ], [ %32, %30 ]
  store i32 %34, ptr %3, align 4, !tbaa !9
  %35 = load i32, ptr %3, align 4, !tbaa !9
  %36 = lshr i32 %35, 16
  %37 = trunc i32 %36 to i16
  store i16 %37, ptr %4, align 2, !tbaa !10
  %38 = load i16, ptr %4, align 2, !tbaa !10
  call void @llvm.lifetime.end.p0(i64 2, ptr %4) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #3
  ret i16 %38
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { nocallback nofree nounwind willreturn memory(argmem: write) }
attributes #2 = { 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 #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 = !{!"float", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!7, !7, i64 0}
!10 = !{!11, !11, i64 0}
!11 = !{!"short", !7, i64 0}


; 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 willreturn memory(none) uwtable
define dso_local zeroext i16 @libxsmm_convert_f32_to_bf16_rnaz(float noundef %0) local_unnamed_addr #0 {
  %2 = bitcast float %0 to i32
  %3 = and i32 %2, 2139095040
  %4 = icmp eq i32 %3, 0
  %5 = and i32 %2, -2147483648
  %6 = select i1 %4, i32 %5, i32 %2
  %7 = and i32 %6, 2139095040
  %8 = icmp eq i32 %7, 2139095040
  br i1 %8, label %9, label %14

9:                                                ; preds = %1
  %10 = and i32 %6, 8388607
  %11 = icmp eq i32 %10, 0
  %12 = or i32 %6, 4194304
  %13 = select i1 %11, i32 %6, i32 %12
  br label %16

14:                                               ; preds = %1
  %15 = add nsw i32 %6, 32768
  br label %16

16:                                               ; preds = %14, %9
  %17 = phi i32 [ %13, %9 ], [ %15, %14 ]
  %18 = lshr i32 %17, 16
  %19 = trunc nuw i32 %18 to i16
  ret i16 %19
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(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)"}


; Effective O3 passes: CorrelatedValuePropagationPass,EarlyCSEPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass