; 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_MeasureArea(ptr noundef %0, i32 noundef %1, i32 noundef %2) #1 {
  %4 = alloca ptr, align 8
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  %8 = alloca double, align 8
  store ptr %0, ptr %4, align 8, !tbaa !5
  store i32 %1, ptr %5, align 4, !tbaa !9
  store i32 %2, ptr %6, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #3
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #3
  store double 0.000000e+00, ptr %8, align 8, !tbaa !11
  store i32 0, ptr %7, align 4, !tbaa !9
  br label %9

9:                                                ; preds = %24, %3
  %10 = load i32, ptr %7, align 4, !tbaa !9
  %11 = load i32, ptr %5, align 4, !tbaa !9
  %12 = icmp slt i32 %10, %11
  br i1 %12, label %13, label %27

13:                                               ; preds = %9
  %14 = load ptr, ptr %4, align 8, !tbaa !5
  %15 = load float, ptr %14, align 4, !tbaa !13
  %16 = fpext float %15 to double
  %17 = call double @llvm.fabs.f64(double %16)
  %18 = load double, ptr %8, align 8, !tbaa !11
  %19 = fadd double %18, %17
  store double %19, ptr %8, align 8, !tbaa !11
  %20 = load i32, ptr %6, align 4, !tbaa !9
  %21 = load ptr, ptr %4, align 8, !tbaa !5
  %22 = sext i32 %20 to i64
  %23 = getelementptr inbounds float, ptr %21, i64 %22
  store ptr %23, ptr %4, align 8, !tbaa !5
  br label %24

24:                                               ; preds = %13
  %25 = load i32, ptr %7, align 4, !tbaa !9
  %26 = add nsw i32 %25, 1
  store i32 %26, ptr %7, align 4, !tbaa !9
  br label %9, !llvm.loop !15

27:                                               ; preds = %9
  %28 = load double, ptr %8, align 8, !tbaa !11
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #3
  ret double %28
}

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare double @llvm.fabs.f64(double) #2

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 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }
attributes #3 = { 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 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"double", !7, i64 0}
!13 = !{!14, !14, i64 0}
!14 = !{!"float", !7, i64 0}
!15 = distinct !{!15, !16}
!16 = !{!"llvm.loop.mustprogress"}


; 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(read, inaccessiblemem: none) uwtable
define dso_local double @PaQa_MeasureArea(ptr nocapture noundef readonly %0, i32 noundef %1, i32 noundef %2) local_unnamed_addr #0 {
  %4 = icmp sgt i32 %1, 0
  br i1 %4, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %3
  %5 = sext i32 %2 to i64
  %xtraiter = and i32 %1, 3
  %6 = icmp ult i32 %1, 4
  br i1 %6, label %._crit_edge.loopexit.unr-lcssa, label %.lr.ph.new

.lr.ph.new:                                       ; preds = %.lr.ph
  %unroll_iter = and i32 %1, 2147483644
  br label %7

7:                                                ; preds = %7, %.lr.ph.new
  %.011 = phi double [ 0.000000e+00, %.lr.ph.new ], [ %26, %7 ]
  %.089 = phi ptr [ %0, %.lr.ph.new ], [ %27, %7 ]
  %niter = phi i32 [ 0, %.lr.ph.new ], [ %niter.next.3, %7 ]
  %8 = load float, ptr %.089, align 4, !tbaa !5
  %9 = tail call float @llvm.fabs.f32(float %8)
  %10 = fpext float %9 to double
  %11 = fadd double %.011, %10
  %12 = getelementptr inbounds float, ptr %.089, i64 %5
  %13 = load float, ptr %12, align 4, !tbaa !5
  %14 = tail call float @llvm.fabs.f32(float %13)
  %15 = fpext float %14 to double
  %16 = fadd double %11, %15
  %17 = getelementptr inbounds float, ptr %12, i64 %5
  %18 = load float, ptr %17, align 4, !tbaa !5
  %19 = tail call float @llvm.fabs.f32(float %18)
  %20 = fpext float %19 to double
  %21 = fadd double %16, %20
  %22 = getelementptr inbounds float, ptr %17, i64 %5
  %23 = load float, ptr %22, align 4, !tbaa !5
  %24 = tail call float @llvm.fabs.f32(float %23)
  %25 = fpext float %24 to double
  %26 = fadd double %21, %25
  %27 = getelementptr inbounds float, ptr %22, i64 %5
  %niter.next.3 = add i32 %niter, 4
  %niter.ncmp.3 = icmp eq i32 %niter.next.3, %unroll_iter
  br i1 %niter.ncmp.3, label %._crit_edge.loopexit.unr-lcssa, label %7, !llvm.loop !9

._crit_edge.loopexit.unr-lcssa:                   ; preds = %7, %.lr.ph
  %.lcssa.ph = phi double [ poison, %.lr.ph ], [ %26, %7 ]
  %.011.unr = phi double [ 0.000000e+00, %.lr.ph ], [ %26, %7 ]
  %.089.unr = phi ptr [ %0, %.lr.ph ], [ %27, %7 ]
  %lcmp.mod.not = icmp eq i32 %xtraiter, 0
  br i1 %lcmp.mod.not, label %._crit_edge, label %.epil.preheader

.epil.preheader:                                  ; preds = %._crit_edge.loopexit.unr-lcssa, %.epil.preheader
  %.011.epil = phi double [ %31, %.epil.preheader ], [ %.011.unr, %._crit_edge.loopexit.unr-lcssa ]
  %.089.epil = phi ptr [ %32, %.epil.preheader ], [ %.089.unr, %._crit_edge.loopexit.unr-lcssa ]
  %epil.iter = phi i32 [ %epil.iter.next, %.epil.preheader ], [ 0, %._crit_edge.loopexit.unr-lcssa ]
  %28 = load float, ptr %.089.epil, align 4, !tbaa !5
  %29 = tail call float @llvm.fabs.f32(float %28)
  %30 = fpext float %29 to double
  %31 = fadd double %.011.epil, %30
  %32 = getelementptr inbounds float, ptr %.089.epil, i64 %5
  %epil.iter.next = add i32 %epil.iter, 1
  %epil.iter.cmp.not = icmp eq i32 %epil.iter.next, %xtraiter
  br i1 %epil.iter.cmp.not, label %._crit_edge, label %.epil.preheader, !llvm.loop !11

._crit_edge:                                      ; preds = %._crit_edge.loopexit.unr-lcssa, %.epil.preheader, %3
  %.0.lcssa = phi double [ 0.000000e+00, %3 ], [ %.lcssa.ph, %._crit_edge.loopexit.unr-lcssa ], [ %31, %.epil.preheader ]
  ret double %.0.lcssa
}

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

attributes #0 = { nofree norecurse nosync nounwind memory(read, inaccessiblemem: 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 = { 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"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.unroll.disable"}


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