; LLVM IR from gem5/gem5 :: ext/softfloat (ui32_to_f64)

; 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.float64_t = type { i64 }
%union.ui64_f64 = type { i64 }

; Function Attrs: nounwind uwtable
define dso_local i64 @ui32_to_f64(i32 noundef %0) #0 {
  %2 = alloca %struct.float64_t, align 8
  %3 = alloca i32, align 4
  %4 = alloca i64, align 8
  %5 = alloca i8, align 1
  %6 = alloca %union.ui64_f64, align 8
  store i32 %0, ptr %3, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #4
  call void @llvm.lifetime.start.p0(i64 1, ptr %5) #4
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #4
  %7 = load i32, ptr %3, align 4, !tbaa !5
  %8 = icmp ne i32 %7, 0
  br i1 %8, label %10, label %9

9:                                                ; preds = %1
  store i64 0, ptr %4, align 8, !tbaa !9
  br label %29

10:                                               ; preds = %1
  %11 = load i32, ptr %3, align 4, !tbaa !5
  %12 = call zeroext i8 @softfloat_countLeadingZeros32(i32 noundef %11)
  %13 = zext i8 %12 to i32
  %14 = add nsw i32 %13, 21
  %15 = trunc i32 %14 to i8
  store i8 %15, ptr %5, align 1, !tbaa !11
  %16 = load i8, ptr %5, align 1, !tbaa !11
  %17 = sext i8 %16 to i32
  %18 = sub nsw i32 1074, %17
  %19 = sext i32 %18 to i64
  %20 = shl i64 %19, 52
  %21 = add i64 0, %20
  %22 = load i32, ptr %3, align 4, !tbaa !5
  %23 = zext i32 %22 to i64
  %24 = load i8, ptr %5, align 1, !tbaa !11
  %25 = sext i8 %24 to i32
  %26 = zext i32 %25 to i64
  %27 = shl i64 %23, %26
  %28 = add i64 %21, %27
  store i64 %28, ptr %4, align 8, !tbaa !9
  br label %29

29:                                               ; preds = %10, %9
  %30 = load i64, ptr %4, align 8, !tbaa !9
  store i64 %30, ptr %6, align 8, !tbaa !11
  call void @llvm.memcpy.p0.p0.i64(ptr align 8 %2, ptr align 8 %6, i64 8, i1 false), !tbaa.struct !12
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #4
  call void @llvm.lifetime.end.p0(i64 1, ptr %5) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #4
  %31 = getelementptr inbounds %struct.float64_t, ptr %2, i32 0, i32 0
  %32 = load i64, ptr %31, align 8
  ret i64 %32
}

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

; Function Attrs: inlinehint nounwind uwtable
declare hidden zeroext i8 @softfloat_countLeadingZeros32(i32 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 = { inlinehint 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 = { 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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"long", !7, i64 0}
!11 = !{!7, !7, i64 0}
!12 = !{i64 0, i64 8, !9}


; 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 @ui32_to_f64(i32 noundef %0) local_unnamed_addr #0 {
  %.not = icmp eq i32 %0, 0
  br i1 %.not, label %13, label %2

2:                                                ; preds = %1
  %3 = tail call zeroext i8 @softfloat_countLeadingZeros32(i32 noundef %0)
  %4 = add i8 %3, 21
  %5 = sext i8 %4 to i32
  %6 = sub nsw i32 1074, %5
  %7 = zext nneg i32 %6 to i64
  %8 = shl nuw nsw i64 %7, 52
  %9 = zext i32 %0 to i64
  %10 = zext nneg i32 %5 to i64
  %11 = shl i64 %9, %10
  %12 = add i64 %8, %11
  br label %13

13:                                               ; preds = %1, %2
  %.0 = phi i64 [ %12, %2 ], [ 0, %1 ]
  ret i64 %.0
}

; Function Attrs: inlinehint nounwind uwtable
declare hidden zeroext i8 @softfloat_countLeadingZeros32(i32 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 = { inlinehint 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" }

!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,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass