; LLVM IR from mausimus/rtdoom :: rtdoom/MathCache.ll (ZNK6rtdoom9MathCache10FastArcTanEf)

; 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: mustprogress nounwind uwtable
define dso_local noundef float @_ZNK6rtdoom9MathCache10FastArcTanEf(ptr noundef nonnull align 4 dereferenceable(262160) %0, float noundef %1) #0 align 2 {
  %3 = alloca ptr, align 8
  %4 = alloca float, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  store float %1, ptr %4, align 4, !tbaa !9
  %5 = load ptr, ptr %3, align 8
  %6 = load float, ptr %4, align 4, !tbaa !9
  %7 = load float, ptr %4, align 4, !tbaa !9
  %8 = load float, ptr %4, align 4, !tbaa !9
  %9 = fsub float %8, 1.000000e+00
  %10 = fmul float %7, %9
  %11 = load float, ptr %4, align 4, !tbaa !9
  %12 = call float @llvm.fmuladd.f32(float 0x3FB0F90960000000, float %11, float 0x3FCF525460000000)
  %13 = fmul float %10, %12
  %14 = fneg float %13
  %15 = call float @llvm.fmuladd.f32(float 0x3FE921FB60000000, float %6, float %14)
  ret float %15
}

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare float @llvm.fmuladd.f32(float, float, float) #1

attributes #0 = { 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 #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++ 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(none) uwtable
define dso_local noundef float @_ZNK6rtdoom9MathCache10FastArcTanEf(ptr nocapture noundef nonnull readnone align 4 dereferenceable(262160) %0, float noundef %1) local_unnamed_addr #0 align 2 {
  %3 = fadd float %1, -1.000000e+00
  %4 = tail call float @llvm.fmuladd.f32(float %1, float 0x3FB0F90960000000, float 0x3FCF525460000000)
  %5 = fneg float %3
  %6 = fmul float %5, %1
  %7 = fmul float %4, %6
  %8 = tail call float @llvm.fmuladd.f32(float %1, float 0x3FE921FB60000000, float %7)
  ret float %8
}

; Function Attrs: mustprogress nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare float @llvm.fmuladd.f32(float, float, float) #1

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(none) 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)"}


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