; LLVM IR from TobiasKozel/VAE :: external/portaudio/qa/loopback/src (audio_analyzer)

; 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: 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: nounwind uwtable
define dso_local double @PaQa_ComputePhaseDifference(double noundef %0, double noundef %1) #1 {
  %3 = alloca double, align 8
  %4 = alloca double, align 8
  %5 = alloca double, align 8
  store double %0, ptr %3, align 8, !tbaa !5
  store double %1, ptr %4, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #2
  %6 = load double, ptr %3, align 8, !tbaa !5
  %7 = load double, ptr %4, align 8, !tbaa !5
  %8 = fsub double %6, %7
  store double %8, ptr %5, align 8, !tbaa !5
  br label %9

9:                                                ; preds = %12, %2
  %10 = load double, ptr %5, align 8, !tbaa !5
  %11 = fcmp ogt double %10, 0x400921FB54442D18
  br i1 %11, label %12, label %15

12:                                               ; preds = %9
  %13 = load double, ptr %5, align 8, !tbaa !5
  %14 = fsub double %13, 0x401921FB54442D18
  store double %14, ptr %5, align 8, !tbaa !5
  br label %9, !llvm.loop !9

15:                                               ; preds = %9
  br label %16

16:                                               ; preds = %19, %15
  %17 = load double, ptr %5, align 8, !tbaa !5
  %18 = fcmp olt double %17, 0xC00921FB54442D18
  br i1 %18, label %19, label %22

19:                                               ; preds = %16
  %20 = load double, ptr %5, align 8, !tbaa !5
  %21 = fadd double %20, 0x401921FB54442D18
  store double %21, ptr %5, align 8, !tbaa !5
  br label %16, !llvm.loop !11

22:                                               ; preds = %16
  %23 = load double, ptr %5, align 8, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #2
  ret double %23
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 = { 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/C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}
!11 = distinct !{!11, !10}


; 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: nofree norecurse nosync nounwind memory(none) uwtable
define dso_local double @PaQa_ComputePhaseDifference(double noundef %0, double noundef %1) local_unnamed_addr #0 {
  %3 = fsub double %0, %1
  %4 = fcmp ogt double %3, 0x400921FB54442D18
  br i1 %4, label %.lr.ph, label %.preheader

.preheader:                                       ; preds = %.lr.ph, %2
  %.0.lcssa = phi double [ %3, %2 ], [ %6, %.lr.ph ]
  %5 = fcmp olt double %.0.lcssa, 0xC00921FB54442D18
  br i1 %5, label %.lr.ph9, label %._crit_edge

.lr.ph:                                           ; preds = %2, %.lr.ph
  %.07 = phi double [ %6, %.lr.ph ], [ %3, %2 ]
  %6 = fadd double %.07, 0xC01921FB54442D18
  %7 = fcmp ogt double %6, 0x400921FB54442D18
  br i1 %7, label %.lr.ph, label %.preheader, !llvm.loop !5

.lr.ph9:                                          ; preds = %.preheader, %.lr.ph9
  %.18 = phi double [ %8, %.lr.ph9 ], [ %.0.lcssa, %.preheader ]
  %8 = fadd double %.18, 0x401921FB54442D18
  %9 = fcmp olt double %8, 0xC00921FB54442D18
  br i1 %9, label %.lr.ph9, label %._crit_edge, !llvm.loop !7

._crit_edge:                                      ; preds = %.lr.ph9, %.preheader
  %.1.lcssa = phi double [ %.0.lcssa, %.preheader ], [ %8, %.lr.ph9 ]
  ret double %.1.lcssa
}

attributes #0 = { nofree norecurse nosync nounwind 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" }

!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 = distinct !{!5, !6}
!6 = !{!"llvm.loop.mustprogress"}
!7 = distinct !{!7, !6}


; Effective O3 passes: GVNPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass