; LLVM IR from kdrag0n/fxdsp :: external/oboe/src/common/Utilities.ll (ZN4oboe19convertFloatToPcm16EPKfPsi)

; 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 void @_ZN4oboe19convertFloatToPcm16EPKfPsi(ptr noundef %0, ptr noundef %1, i32 noundef %2) #0 {
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  %8 = alloca float, align 4
  %9 = alloca i32, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !5
  store i32 %2, ptr %6, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #2
  store i32 0, ptr %7, align 4, !tbaa !9
  br label %10

10:                                               ; preds = %46, %3
  %11 = load i32, ptr %7, align 4, !tbaa !9
  %12 = load i32, ptr %6, align 4, !tbaa !9
  %13 = icmp slt i32 %11, %12
  br i1 %13, label %15, label %14

14:                                               ; preds = %10
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #2
  br label %49

15:                                               ; preds = %10
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #2
  %16 = load ptr, ptr %4, align 8, !tbaa !5
  %17 = load i32, ptr %7, align 4, !tbaa !9
  %18 = sext i32 %17 to i64
  %19 = getelementptr inbounds float, ptr %16, i64 %18
  %20 = load float, ptr %19, align 4, !tbaa !11
  store float %20, ptr %8, align 4, !tbaa !11
  %21 = load float, ptr %8, align 4, !tbaa !11
  %22 = fpext float %21 to double
  %23 = fadd double %22, 1.000000e+00
  %24 = fptrunc double %23 to float
  store float %24, ptr %8, align 4, !tbaa !11
  %25 = load float, ptr %8, align 4, !tbaa !11
  %26 = fmul float %25, 3.276800e+04
  store float %26, ptr %8, align 4, !tbaa !11
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #2
  %27 = load float, ptr %8, align 4, !tbaa !11
  %28 = fptosi float %27 to i32
  store i32 %28, ptr %9, align 4, !tbaa !9
  %29 = load i32, ptr %9, align 4, !tbaa !9
  %30 = icmp slt i32 %29, 0
  br i1 %30, label %31, label %32

31:                                               ; preds = %15
  store i32 0, ptr %9, align 4, !tbaa !9
  br label %37

32:                                               ; preds = %15
  %33 = load i32, ptr %9, align 4, !tbaa !9
  %34 = icmp sgt i32 %33, 65535
  br i1 %34, label %35, label %36

35:                                               ; preds = %32
  store i32 65535, ptr %9, align 4, !tbaa !9
  br label %36

36:                                               ; preds = %35, %32
  br label %37

37:                                               ; preds = %36, %31
  %38 = load i32, ptr %9, align 4, !tbaa !9
  %39 = sub nsw i32 %38, 32768
  store i32 %39, ptr %9, align 4, !tbaa !9
  %40 = load i32, ptr %9, align 4, !tbaa !9
  %41 = trunc i32 %40 to i16
  %42 = load ptr, ptr %5, align 8, !tbaa !5
  %43 = load i32, ptr %7, align 4, !tbaa !9
  %44 = sext i32 %43 to i64
  %45 = getelementptr inbounds i16, ptr %42, i64 %44
  store i16 %41, ptr %45, align 2, !tbaa !13
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #2
  br label %46

46:                                               ; preds = %37
  %47 = load i32, ptr %7, align 4, !tbaa !9
  %48 = add nsw i32 %47, 1
  store i32 %48, ptr %7, align 4, !tbaa !9
  br label %10, !llvm.loop !15

49:                                               ; preds = %14
  ret void
}

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #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 willreturn memory(argmem: readwrite) }
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 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"float", !7, i64 0}
!13 = !{!14, !14, i64 0}
!14 = !{!"short", !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: mustprogress nofree norecurse nosync nounwind memory(argmem: readwrite) uwtable
define dso_local void @_ZN4oboe19convertFloatToPcm16EPKfPsi(ptr nocapture noundef readonly %0, ptr nocapture noundef writeonly %1, i32 noundef %2) local_unnamed_addr #0 {
  %4 = icmp sgt i32 %2, 0
  br i1 %4, label %.lr.ph.preheader, label %._crit_edge

.lr.ph.preheader:                                 ; preds = %3
  %wide.trip.count = zext nneg i32 %2 to i64
  %min.iters.check = icmp ult i32 %2, 4
  br i1 %min.iters.check, label %.lr.ph.preheader17, label %vector.ph

.lr.ph.preheader17:                               ; preds = %middle.block, %.lr.ph.preheader
  %indvars.iv.ph = phi i64 [ 0, %.lr.ph.preheader ], [ %n.vec, %middle.block ]
  br label %.lr.ph

vector.ph:                                        ; preds = %.lr.ph.preheader
  %n.vec = and i64 %wide.trip.count, 2147483644
  br label %vector.body

vector.body:                                      ; preds = %vector.body, %vector.ph
  %index = phi i64 [ 0, %vector.ph ], [ %index.next, %vector.body ]
  %5 = getelementptr inbounds float, ptr %0, i64 %index
  %wide.load = load <4 x float>, ptr %5, align 4, !tbaa !5
  %6 = fadd <4 x float> %wide.load, <float 1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00>
  %7 = fmul <4 x float> %6, <float 3.276800e+04, float 3.276800e+04, float 3.276800e+04, float 3.276800e+04>
  %8 = fptosi <4 x float> %7 to <4 x i32>
  %9 = tail call <4 x i32> @llvm.smin.v4i32(<4 x i32> %8, <4 x i32> <i32 65535, i32 65535, i32 65535, i32 65535>)
  %10 = tail call <4 x i32> @llvm.smax.v4i32(<4 x i32> %9, <4 x i32> zeroinitializer)
  %11 = trunc <4 x i32> %10 to <4 x i16>
  %12 = xor <4 x i16> %11, <i16 -32768, i16 -32768, i16 -32768, i16 -32768>
  %13 = getelementptr inbounds i16, ptr %1, i64 %index
  store <4 x i16> %12, ptr %13, align 2, !tbaa !9
  %index.next = add nuw i64 %index, 4
  %14 = icmp eq i64 %index.next, %n.vec
  br i1 %14, label %middle.block, label %vector.body, !llvm.loop !11

middle.block:                                     ; preds = %vector.body
  %cmp.n = icmp eq i64 %n.vec, %wide.trip.count
  br i1 %cmp.n, label %._crit_edge, label %.lr.ph.preheader17

._crit_edge:                                      ; preds = %.lr.ph, %middle.block, %3
  ret void

.lr.ph:                                           ; preds = %.lr.ph.preheader17, %.lr.ph
  %indvars.iv = phi i64 [ %indvars.iv.next, %.lr.ph ], [ %indvars.iv.ph, %.lr.ph.preheader17 ]
  %15 = getelementptr inbounds float, ptr %0, i64 %indvars.iv
  %16 = load float, ptr %15, align 4, !tbaa !5
  %17 = fadd float %16, 1.000000e+00
  %18 = fmul float %17, 3.276800e+04
  %19 = fptosi float %18 to i32
  %spec.store.select = tail call i32 @llvm.smin.i32(i32 %19, i32 65535)
  %.0 = tail call i32 @llvm.smax.i32(i32 %spec.store.select, i32 0)
  %20 = trunc nuw i32 %.0 to i16
  %21 = xor i16 %20, -32768
  %22 = getelementptr inbounds i16, ptr %1, i64 %indvars.iv
  store i16 %21, ptr %22, align 2, !tbaa !9
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %exitcond.not = icmp eq i64 %indvars.iv.next, %wide.trip.count
  br i1 %exitcond.not, label %._crit_edge, label %.lr.ph, !llvm.loop !15
}

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i32 @llvm.smin.i32(i32, i32) #1

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i32 @llvm.smax.i32(i32, i32) #1

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare <4 x i32> @llvm.smin.v4i32(<4 x i32>, <4 x i32>) #1

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare <4 x i32> @llvm.smax.v4i32(<4 x i32>, <4 x i32>) #1

attributes #0 = { mustprogress nofree norecurse nosync nounwind memory(argmem: readwrite) 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++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"short", !7, i64 0}
!11 = distinct !{!11, !12, !13, !14}
!12 = !{!"llvm.loop.mustprogress"}
!13 = !{!"llvm.loop.isvectorized", i32 1}
!14 = !{!"llvm.loop.unroll.runtime.disable"}
!15 = distinct !{!15, !12, !14, !13}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopLoadEliminationPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,LoopVectorizePass,PostOrderFunctionAttrsPass,SCCPPass,SROAPass,SimplifyCFGPass,TailCallElimPass