; LLVM IR from ERGO-Code/HiGHS :: src/util/HighsUtils.ll (Z22nearestPowerOfTwoScaled)

; 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"

@.str.52 = external hidden unnamed_addr constant [73 x i8], align 1
@.str.137 = external hidden unnamed_addr constant [21 x i8], align 1
@__PRETTY_FUNCTION__._Z22nearestPowerOfTwoScaled = external hidden unnamed_addr constant [44 x i8], align 1

; 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: inlinehint mustprogress nounwind uwtable
declare dso_local noundef double @_ZSt5ldexpIiEN9__gnu_cxx11__enable_ifIXsr12__is_integerIT_EE7__valueEdE6__typeES2_i(i32 noundef, i32 noundef) #1

; Function Attrs: noreturn nounwind
declare void @__assert_fail(ptr noundef, ptr noundef, i32 noundef, ptr noundef) #2

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare double @llvm.fabs.f64(double) #3

; Function Attrs: mustprogress uwtable
define dso_local noundef double @_Z22nearestPowerOfTwoScaled(double noundef %0) #4 {
  %2 = alloca double, align 8
  %3 = alloca i32, align 4
  %4 = alloca double, align 8
  %5 = alloca double, align 8
  %6 = alloca double, align 8
  store double %0, ptr %2, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #6
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #6
  %7 = load double, ptr %2, align 8, !tbaa !5
  %8 = call double @frexp(double noundef %7, ptr noundef %3) #6
  store double %8, ptr %4, align 8, !tbaa !5
  %9 = load double, ptr %4, align 8, !tbaa !5
  %10 = call double @llvm.fabs.f64(double %9)
  %11 = fcmp oeq double %10, 5.000000e-01
  br i1 %11, label %12, label %17

12:                                               ; preds = %1
  %13 = load double, ptr %4, align 8, !tbaa !5
  %14 = fmul double %13, 2.000000e+00
  store double %14, ptr %4, align 8, !tbaa !5
  %15 = load i32, ptr %3, align 4, !tbaa !9
  %16 = add nsw i32 %15, -1
  store i32 %16, ptr %3, align 4, !tbaa !9
  br label %17

17:                                               ; preds = %12, %1
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #6
  %18 = load double, ptr %4, align 8, !tbaa !5
  %19 = load i32, ptr %3, align 4, !tbaa !9
  %20 = call noundef double @_ZSt3powIiiEN9__gnu_cxx9__promoteIDTplcvNS1_IT_Xsr3std12__is_integerIS2_EE7__valueEE6__typeELi0EcvNS1_IT0_Xsr3std12__is_integerIS5_EE7__valueEE6__typeELi0EEXsr3std12__is_integerIS8_EE7__valueEE6__typeES2_S5_(i32 noundef 2, i32 noundef %19)
  %21 = fmul double %18, %20
  store double %21, ptr %5, align 8, !tbaa !5
  %22 = load double, ptr %5, align 8, !tbaa !5
  %23 = load double, ptr %2, align 8, !tbaa !5
  %24 = fcmp oeq double %22, %23
  br i1 %24, label %25, label %26

25:                                               ; preds = %17
  br label %28

26:                                               ; preds = %17
  call void @__assert_fail(ptr noundef @.str.137, ptr noundef @.str.52, i32 noundef 1225, ptr noundef @__PRETTY_FUNCTION__._Z22nearestPowerOfTwoScaled) #7
  unreachable

27:                                               ; No predecessors!
  br label %28

28:                                               ; preds = %27, %25
  %29 = load i32, ptr %3, align 4, !tbaa !9
  %30 = sub nsw i32 0, %29
  store i32 %30, ptr %3, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #6
  %31 = load i32, ptr %3, align 4, !tbaa !9
  %32 = call noundef double @_ZSt5ldexpIiEN9__gnu_cxx11__enable_ifIXsr12__is_integerIT_EE7__valueEdE6__typeES2_i(i32 noundef 1, i32 noundef %31)
  store double %32, ptr %6, align 8, !tbaa !5
  %33 = load double, ptr %6, align 8, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #6
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #6
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #6
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #6
  ret double %33
}

; Function Attrs: nounwind
declare double @frexp(double noundef, ptr noundef) #5

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef double @_ZSt3powIiiEN9__gnu_cxx9__promoteIDTplcvNS1_IT_Xsr3std12__is_integerIS2_EE7__valueEE6__typeELi0EcvNS1_IT0_Xsr3std12__is_integerIS5_EE7__valueEE6__typeELi0EEXsr3std12__is_integerIS8_EE7__valueEE6__typeES2_S5_(i32 noundef, i32 noundef) #1

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { inlinehint mustprogress 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 = { noreturn nounwind "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 nosync nounwind speculatable willreturn memory(none) }
attributes #4 = { mustprogress 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 #5 = { nounwind "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 #6 = { nounwind }
attributes #7 = { noreturn 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 = !{!"double", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !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"

@.str.52 = external hidden unnamed_addr constant [73 x i8], align 1
@.str.137 = external hidden unnamed_addr constant [21 x i8], align 1
@__PRETTY_FUNCTION__._Z22nearestPowerOfTwoScaled = external hidden unnamed_addr constant [44 x i8], align 1

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef double @_ZSt5ldexpIiEN9__gnu_cxx11__enable_ifIXsr12__is_integerIT_EE7__valueEdE6__typeES2_i(i32 noundef, i32 noundef) local_unnamed_addr #1

; Function Attrs: noreturn nounwind
declare void @__assert_fail(ptr noundef, ptr noundef, i32 noundef, ptr noundef) local_unnamed_addr #2

; Function Attrs: mustprogress nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare double @llvm.fabs.f64(double) #3

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef double @_Z22nearestPowerOfTwoScaled(double noundef %0) local_unnamed_addr #4 {
  %2 = alloca i32, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %2) #6
  %3 = call double @frexp(double noundef %0, ptr noundef nonnull %2) #6
  %4 = tail call double @llvm.fabs.f64(double %3)
  %5 = fcmp oeq double %4, 5.000000e-01
  %.pre = load i32, ptr %2, align 4, !tbaa !5
  %6 = fmul double %3, 2.000000e+00
  %7 = sext i1 %5 to i32
  %8 = add nsw i32 %.pre, %7
  %.0 = select i1 %5, double %6, double %3
  %9 = tail call noundef double @_ZSt3powIiiEN9__gnu_cxx9__promoteIDTplcvNS1_IT_Xsr3std12__is_integerIS2_EE7__valueEE6__typeELi0EcvNS1_IT0_Xsr3std12__is_integerIS5_EE7__valueEE6__typeELi0EEXsr3std12__is_integerIS8_EE7__valueEE6__typeES2_S5_(i32 noundef 2, i32 noundef %8)
  %10 = fmul double %.0, %9
  %11 = fcmp oeq double %10, %0
  br i1 %11, label %13, label %12

12:                                               ; preds = %1
  tail call void @__assert_fail(ptr noundef nonnull @.str.137, ptr noundef nonnull @.str.52, i32 noundef 1225, ptr noundef nonnull @__PRETTY_FUNCTION__._Z22nearestPowerOfTwoScaled) #7
  unreachable

13:                                               ; preds = %1
  %14 = sub nsw i32 0, %8
  %15 = tail call noundef double @_ZSt5ldexpIiEN9__gnu_cxx11__enable_ifIXsr12__is_integerIT_EE7__valueEdE6__typeES2_i(i32 noundef 1, i32 noundef %14)
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %2) #6
  ret double %15
}

; Function Attrs: mustprogress nofree nounwind willreturn memory(argmem: write)
declare double @frexp(double noundef, ptr nocapture noundef) local_unnamed_addr #5

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef double @_ZSt3powIiiEN9__gnu_cxx9__promoteIDTplcvNS1_IT_Xsr3std12__is_integerIS2_EE7__valueEE6__typeELi0EcvNS1_IT0_Xsr3std12__is_integerIS5_EE7__valueEE6__typeELi0EEXsr3std12__is_integerIS8_EE7__valueEE6__typeES2_S5_(i32 noundef, i32 noundef) local_unnamed_addr #1

attributes #0 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { inlinehint mustprogress 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 = { noreturn nounwind "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 = { mustprogress nocallback nofree nosync nounwind speculatable willreturn memory(none) }
attributes #4 = { mustprogress 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 #5 = { mustprogress nofree nounwind willreturn memory(argmem: write) "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 #6 = { nounwind }
attributes #7 = { noreturn 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++ TBAA"}


; Effective O3 passes: DSEPass,EarlyCSEPass,GVNPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass