; LLVM IR from gem5/gem5 :: ext/softfloat (ui64_to_extF80M)

; 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"

%struct.extFloat80M = type { i64, i16 }

; Function Attrs: nounwind uwtable
define dso_local void @ui64_to_extF80M(i64 noundef %0, ptr noundef %1) #0 {
  %3 = alloca i64, align 8
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca i64, align 8
  %7 = alloca i64, align 8
  %8 = alloca i8, align 1
  store i64 %0, ptr %3, align 8, !tbaa !5
  store ptr %1, ptr %4, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #3
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #3
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #3
  call void @llvm.lifetime.start.p0(i64 1, ptr %8) #3
  %9 = load ptr, ptr %4, align 8, !tbaa !9
  store ptr %9, ptr %5, align 8, !tbaa !9
  store i64 0, ptr %6, align 8, !tbaa !5
  store i64 0, ptr %7, align 8, !tbaa !5
  %10 = load i64, ptr %3, align 8, !tbaa !5
  %11 = icmp ne i64 %10, 0
  br i1 %11, label %12, label %25

12:                                               ; preds = %2
  %13 = load i64, ptr %3, align 8, !tbaa !5
  %14 = call zeroext i8 @softfloat_countLeadingZeros64(i64 noundef %13)
  store i8 %14, ptr %8, align 1, !tbaa !11
  %15 = load i8, ptr %8, align 1, !tbaa !11
  %16 = sext i8 %15 to i32
  %17 = sub nsw i32 16446, %16
  %18 = sext i32 %17 to i64
  %19 = or i64 0, %18
  store i64 %19, ptr %6, align 8, !tbaa !5
  %20 = load i64, ptr %3, align 8, !tbaa !5
  %21 = load i8, ptr %8, align 1, !tbaa !11
  %22 = sext i8 %21 to i32
  %23 = zext i32 %22 to i64
  %24 = shl i64 %20, %23
  store i64 %24, ptr %7, align 8, !tbaa !5
  br label %25

25:                                               ; preds = %12, %2
  %26 = load i64, ptr %6, align 8, !tbaa !5
  %27 = trunc i64 %26 to i16
  %28 = load ptr, ptr %5, align 8, !tbaa !9
  %29 = getelementptr inbounds %struct.extFloat80M, ptr %28, i32 0, i32 1
  store i16 %27, ptr %29, align 8, !tbaa !12
  %30 = load i64, ptr %7, align 8, !tbaa !5
  %31 = load ptr, ptr %5, align 8, !tbaa !9
  %32 = getelementptr inbounds %struct.extFloat80M, ptr %31, i32 0, i32 0
  store i64 %30, ptr %32, align 8, !tbaa !15
  call void @llvm.lifetime.end.p0(i64 1, ptr %8) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #3
  ret void
}

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

declare zeroext i8 @softfloat_countLeadingZeros64(i64 noundef) #2

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

attributes #0 = { 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 #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { "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 = !{!"long", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"any pointer", !7, i64 0}
!11 = !{!7, !7, i64 0}
!12 = !{!13, !14, i64 8}
!13 = !{!"extFloat80M", !6, i64 0, !14, i64 8}
!14 = !{!"short", !7, i64 0}
!15 = !{!13, !6, 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: nounwind uwtable
define dso_local void @ui64_to_extF80M(i64 noundef %0, ptr nocapture noundef writeonly %1) local_unnamed_addr #0 {
  %.not = icmp eq i64 %0, 0
  br i1 %.not, label %10, label %3

3:                                                ; preds = %2
  %4 = tail call zeroext i8 @softfloat_countLeadingZeros64(i64 noundef %0) #2
  %5 = sext i8 %4 to i64
  %6 = and i64 %5, 4294967295
  %7 = shl i64 %0, %6
  %8 = sext i8 %4 to i16
  %9 = sub nsw i16 16446, %8
  br label %10

10:                                               ; preds = %3, %2
  %.09 = phi i64 [ %7, %3 ], [ 0, %2 ]
  %.0 = phi i16 [ %9, %3 ], [ 0, %2 ]
  %11 = getelementptr inbounds i8, ptr %1, i64 8
  store i16 %.0, ptr %11, align 8, !tbaa !5
  store i64 %.09, ptr %1, align 8, !tbaa !11
  ret void
}

declare zeroext i8 @softfloat_countLeadingZeros64(i64 noundef) local_unnamed_addr #1

attributes #0 = { 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 #1 = { "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, !10, i64 8}
!6 = !{!"extFloat80M", !7, i64 0, !10, i64 8}
!7 = !{!"long", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"short", !8, i64 0}
!11 = !{!6, !7, i64 0}


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