; LLVM IR from niuyishuai/PDCABB :: LAPACK_BLAS/LIBF2C/libf2c (r_nint)

; 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"

; Function Attrs: nounwind uwtable
define dso_local double @r_nint(ptr noundef %0) #0 {
  %2 = alloca ptr, align 8
  store ptr %0, ptr %2, align 8, !tbaa !5
  %3 = load ptr, ptr %2, align 8, !tbaa !5
  %4 = load float, ptr %3, align 4, !tbaa !9
  %5 = fcmp oge float %4, 0.000000e+00
  br i1 %5, label %6, label %12

6:                                                ; preds = %1
  %7 = load ptr, ptr %2, align 8, !tbaa !5
  %8 = load float, ptr %7, align 4, !tbaa !9
  %9 = fpext float %8 to double
  %10 = fadd double %9, 5.000000e-01
  %11 = call double @llvm.floor.f64(double %10)
  br label %19

12:                                               ; preds = %1
  %13 = load ptr, ptr %2, align 8, !tbaa !5
  %14 = load float, ptr %13, align 4, !tbaa !9
  %15 = fpext float %14 to double
  %16 = fsub double 5.000000e-01, %15
  %17 = call double @llvm.floor.f64(double %16)
  %18 = fneg double %17
  br label %19

19:                                               ; preds = %12, %6
  %20 = phi double [ %11, %6 ], [ %18, %12 ]
  ret double %20
}

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

!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 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"float", !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(argmem: read) uwtable
define dso_local double @r_nint(ptr nocapture noundef readonly %0) local_unnamed_addr #0 {
  %2 = load float, ptr %0, align 4, !tbaa !5
  %3 = fcmp ult float %2, 0.000000e+00
  %4 = fpext float %2 to double
  br i1 %3, label %8, label %5

5:                                                ; preds = %1
  %6 = fadd double %4, 5.000000e-01
  %7 = tail call double @llvm.floor.f64(double %6)
  br label %12

8:                                                ; preds = %1
  %9 = fsub double 5.000000e-01, %4
  %10 = tail call double @llvm.floor.f64(double %9)
  %11 = fneg double %10
  br label %12

12:                                               ; preds = %8, %5
  %13 = phi double [ %7, %5 ], [ %11, %8 ]
  ret double %13
}

; Function Attrs: mustprogress nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare double @llvm.floor.f64(double) #1

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(argmem: read) 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 = { mustprogress nocallback nofree nosync nounwind speculatable willreturn memory(none) }

!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"}


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