; LLVM IR from gem5/gem5 :: ext/softfloat (i64_to_extF80)

; 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 }
%union.anon = type { %struct.extFloat80M }

; Function Attrs: nounwind uwtable
define dso_local { i64, i16 } @i64_to_extF80(i64 noundef %0) #0 {
  %2 = alloca %struct.extFloat80M, align 8
  %3 = alloca i64, align 8
  %4 = alloca i64, align 8
  %5 = alloca i64, align 8
  %6 = alloca i8, align 1
  %7 = alloca i8, align 1
  %8 = alloca %union.anon, align 8
  store i64 %0, ptr %3, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #4
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #4
  call void @llvm.lifetime.start.p0(i64 1, ptr %6) #4
  call void @llvm.lifetime.start.p0(i64 1, ptr %7) #4
  call void @llvm.lifetime.start.p0(i64 16, ptr %8) #4
  store i64 0, ptr %4, align 8, !tbaa !5
  store i64 0, ptr %5, align 8, !tbaa !5
  %9 = load i64, ptr %3, align 8, !tbaa !5
  %10 = icmp ne i64 %9, 0
  br i1 %10, label %11, label %40

11:                                               ; preds = %1
  %12 = load i64, ptr %3, align 8, !tbaa !5
  %13 = icmp slt i64 %12, 0
  %14 = zext i1 %13 to i8
  store i8 %14, ptr %6, align 1, !tbaa !9
  %15 = load i8, ptr %6, align 1, !tbaa !9, !range !11, !noundef !12
  %16 = trunc i8 %15 to i1
  br i1 %16, label %17, label %20

17:                                               ; preds = %11
  %18 = load i64, ptr %3, align 8, !tbaa !5
  %19 = sub i64 0, %18
  br label %22

20:                                               ; preds = %11
  %21 = load i64, ptr %3, align 8, !tbaa !5
  br label %22

22:                                               ; preds = %20, %17
  %23 = phi i64 [ %19, %17 ], [ %21, %20 ]
  store i64 %23, ptr %5, align 8, !tbaa !5
  %24 = load i64, ptr %5, align 8, !tbaa !5
  %25 = call zeroext i8 @softfloat_countLeadingZeros64(i64 noundef %24)
  store i8 %25, ptr %7, align 1, !tbaa !13
  %26 = load i8, ptr %6, align 1, !tbaa !9, !range !11, !noundef !12
  %27 = trunc i8 %26 to i1
  %28 = zext i1 %27 to i64
  %29 = shl i64 %28, 15
  %30 = load i8, ptr %7, align 1, !tbaa !13
  %31 = sext i8 %30 to i32
  %32 = sub nsw i32 16446, %31
  %33 = sext i32 %32 to i64
  %34 = or i64 %29, %33
  store i64 %34, ptr %4, align 8, !tbaa !5
  %35 = load i8, ptr %7, align 1, !tbaa !13
  %36 = sext i8 %35 to i32
  %37 = load i64, ptr %5, align 8, !tbaa !5
  %38 = zext i32 %36 to i64
  %39 = shl i64 %37, %38
  store i64 %39, ptr %5, align 8, !tbaa !5
  br label %40

40:                                               ; preds = %22, %1
  %41 = load i64, ptr %4, align 8, !tbaa !5
  %42 = trunc i64 %41 to i16
  %43 = getelementptr inbounds %struct.extFloat80M, ptr %8, i32 0, i32 1
  store i16 %42, ptr %43, align 8, !tbaa !13
  %44 = load i64, ptr %5, align 8, !tbaa !5
  %45 = getelementptr inbounds %struct.extFloat80M, ptr %8, i32 0, i32 0
  store i64 %44, ptr %45, align 8, !tbaa !13
  call void @llvm.memcpy.p0.p0.i64(ptr align 8 %2, ptr align 8 %8, i64 16, i1 false), !tbaa.struct !14
  call void @llvm.lifetime.end.p0(i64 16, ptr %8) #4
  call void @llvm.lifetime.end.p0(i64 1, ptr %7) #4
  call void @llvm.lifetime.end.p0(i64 1, ptr %6) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #4
  %46 = load { i64, i16 }, ptr %2, align 8
  ret { i64, i16 } %46
}

; 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 nounwind willreturn memory(argmem: readwrite)
declare void @llvm.memcpy.p0.p0.i64(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, i64, i1 immarg) #3

; 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 = { nocallback nofree nounwind willreturn memory(argmem: readwrite) }
attributes #4 = { 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 = !{!"_Bool", !7, i64 0}
!11 = !{i8 0, i8 2}
!12 = !{}
!13 = !{!7, !7, i64 0}
!14 = !{i64 0, i64 8, !5, i64 8, i64 2, !15}
!15 = !{!16, !16, i64 0}
!16 = !{!"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: nounwind uwtable
define dso_local { i64, i16 } @i64_to_extF80(i64 noundef %0) local_unnamed_addr #0 {
  %.not = icmp eq i64 %0, 0
  br i1 %.not, label %14, label %2

2:                                                ; preds = %1
  %3 = tail call i64 @llvm.abs.i64(i64 %0, i1 false)
  %4 = tail call zeroext i8 @softfloat_countLeadingZeros64(i64 noundef %3) #3
  %5 = lshr i64 %0, 48
  %6 = and i64 %5, 32768
  %7 = sext i8 %4 to i32
  %8 = sub nsw i32 16446, %7
  %9 = zext nneg i32 %8 to i64
  %10 = or i64 %6, %9
  %11 = zext nneg i32 %7 to i64
  %12 = shl i64 %3, %11
  %13 = trunc nuw i64 %10 to i16
  br label %14

14:                                               ; preds = %2, %1
  %.014 = phi i64 [ %12, %2 ], [ 0, %1 ]
  %.0 = phi i16 [ %13, %2 ], [ 0, %1 ]
  %.fca.0.insert = insertvalue { i64, i16 } poison, i64 %.014, 0
  %.fca.1.insert = insertvalue { i64, i16 } %.fca.0.insert, i16 %.0, 1
  ret { i64, i16 } %.fca.1.insert
}

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

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i64 @llvm.abs.i64(i64, i1 immarg) #2

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 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }
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)"}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass