; LLVM IR from introlab/odas :: src/signal (freq)

; 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"

%struct.freqs_obj = type { i32, i32, ptr }

; Function Attrs: nounwind uwtable
define dso_local ptr @freqs_construct_zero(i32 noundef %0, i32 noundef %1) #0 {
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  store i32 %0, ptr %3, align 4, !tbaa !5
  store i32 %1, ptr %4, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #4
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #4
  %7 = call noalias ptr @malloc(i64 noundef 16) #5
  store ptr %7, ptr %5, align 8, !tbaa !9
  %8 = load i32, ptr %3, align 4, !tbaa !5
  %9 = load ptr, ptr %5, align 8, !tbaa !9
  %10 = getelementptr inbounds %struct.freqs_obj, ptr %9, i32 0, i32 0
  store i32 %8, ptr %10, align 8, !tbaa !11
  %11 = load i32, ptr %4, align 4, !tbaa !5
  %12 = load ptr, ptr %5, align 8, !tbaa !9
  %13 = getelementptr inbounds %struct.freqs_obj, ptr %12, i32 0, i32 1
  store i32 %11, ptr %13, align 4, !tbaa !13
  %14 = load i32, ptr %3, align 4, !tbaa !5
  %15 = zext i32 %14 to i64
  %16 = mul i64 8, %15
  %17 = call noalias ptr @malloc(i64 noundef %16) #5
  %18 = load ptr, ptr %5, align 8, !tbaa !9
  %19 = getelementptr inbounds %struct.freqs_obj, ptr %18, i32 0, i32 2
  store ptr %17, ptr %19, align 8, !tbaa !14
  store i32 0, ptr %6, align 4, !tbaa !5
  br label %20

20:                                               ; preds = %47, %2
  %21 = load i32, ptr %6, align 4, !tbaa !5
  %22 = load i32, ptr %3, align 4, !tbaa !5
  %23 = icmp ult i32 %21, %22
  br i1 %23, label %24, label %50

24:                                               ; preds = %20
  %25 = load i32, ptr %4, align 4, !tbaa !5
  %26 = zext i32 %25 to i64
  %27 = mul i64 4, %26
  %28 = mul i64 %27, 2
  %29 = call noalias ptr @malloc(i64 noundef %28) #5
  %30 = load ptr, ptr %5, align 8, !tbaa !9
  %31 = getelementptr inbounds %struct.freqs_obj, ptr %30, i32 0, i32 2
  %32 = load ptr, ptr %31, align 8, !tbaa !14
  %33 = load i32, ptr %6, align 4, !tbaa !5
  %34 = zext i32 %33 to i64
  %35 = getelementptr inbounds ptr, ptr %32, i64 %34
  store ptr %29, ptr %35, align 8, !tbaa !9
  %36 = load ptr, ptr %5, align 8, !tbaa !9
  %37 = getelementptr inbounds %struct.freqs_obj, ptr %36, i32 0, i32 2
  %38 = load ptr, ptr %37, align 8, !tbaa !14
  %39 = load i32, ptr %6, align 4, !tbaa !5
  %40 = zext i32 %39 to i64
  %41 = getelementptr inbounds ptr, ptr %38, i64 %40
  %42 = load ptr, ptr %41, align 8, !tbaa !9
  %43 = load i32, ptr %4, align 4, !tbaa !5
  %44 = mul i32 %43, 2
  %45 = zext i32 %44 to i64
  %46 = mul i64 %45, 4
  call void @llvm.memset.p0.i64(ptr align 4 %42, i8 0, i64 %46, i1 false)
  br label %47

47:                                               ; preds = %24
  %48 = load i32, ptr %6, align 4, !tbaa !5
  %49 = add i32 %48, 1
  store i32 %49, ptr %6, align 4, !tbaa !5
  br label %20, !llvm.loop !15

50:                                               ; preds = %20
  %51 = load ptr, ptr %5, align 8, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #4
  ret ptr %51
}

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

; Function Attrs: nounwind allocsize(0)
declare noalias ptr @malloc(i64 noundef) #2

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #3

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #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 willreturn memory(argmem: readwrite) }
attributes #2 = { nounwind allocsize(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 #3 = { nocallback nofree nounwind willreturn memory(argmem: write) }
attributes #4 = { nounwind }
attributes #5 = { nounwind allocsize(0) }

!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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"any pointer", !7, i64 0}
!11 = !{!12, !6, i64 0}
!12 = !{!"freqs_obj", !6, i64 0, !6, i64 4, !10, i64 8}
!13 = !{!12, !6, i64 4}
!14 = !{!12, !10, i64 8}
!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 nounwind memory(write, argmem: none, inaccessiblemem: readwrite) uwtable
define dso_local noalias noundef ptr @freqs_construct_zero(i32 noundef %0, i32 noundef %1) local_unnamed_addr #0 {
  %3 = tail call noalias dereferenceable_or_null(16) ptr @malloc(i64 noundef 16) #3
  store i32 %0, ptr %3, align 8, !tbaa !5
  %4 = getelementptr inbounds i8, ptr %3, i64 4
  store i32 %1, ptr %4, align 4, !tbaa !11
  %5 = zext i32 %0 to i64
  %6 = shl nuw nsw i64 %5, 3
  %7 = tail call noalias ptr @malloc(i64 noundef %6) #3
  %8 = getelementptr inbounds i8, ptr %3, i64 8
  store ptr %7, ptr %8, align 8, !tbaa !12
  %.not = icmp eq i32 %0, 0
  br i1 %.not, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %2
  %9 = zext i32 %1 to i64
  %10 = shl nuw nsw i64 %9, 3
  %11 = shl i32 %1, 1
  %12 = zext i32 %11 to i64
  %13 = shl nuw nsw i64 %12, 2
  br label %14

14:                                               ; preds = %.lr.ph, %14
  %indvars.iv = phi i64 [ 0, %.lr.ph ], [ %indvars.iv.next, %14 ]
  %15 = tail call noalias ptr @malloc(i64 noundef %10) #3
  %16 = getelementptr inbounds ptr, ptr %7, i64 %indvars.iv
  store ptr %15, ptr %16, align 8, !tbaa !13
  tail call void @llvm.memset.p0.i64(ptr align 4 %15, i8 0, i64 %13, i1 false)
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %exitcond.not = icmp eq i64 %indvars.iv.next, %5
  br i1 %exitcond.not, label %._crit_edge, label %14, !llvm.loop !14

._crit_edge:                                      ; preds = %14, %2
  ret ptr %3
}

; Function Attrs: mustprogress nofree nounwind willreturn allockind("alloc,uninitialized") allocsize(0) memory(inaccessiblemem: readwrite)
declare noalias noundef ptr @malloc(i64 noundef) local_unnamed_addr #1

; Function Attrs: mustprogress nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #2

attributes #0 = { nofree nounwind memory(write, argmem: none, inaccessiblemem: 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 = { mustprogress nofree nounwind willreturn allockind("alloc,uninitialized") allocsize(0) memory(inaccessiblemem: readwrite) "alloc-family"="malloc" "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 = { mustprogress nocallback nofree nounwind willreturn memory(argmem: write) }
attributes #3 = { nounwind allocsize(0) }

!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, !7, i64 0}
!6 = !{!"freqs_obj", !7, i64 0, !7, i64 4, !10, i64 8}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"any pointer", !8, i64 0}
!11 = !{!6, !7, i64 4}
!12 = !{!6, !10, i64 8}
!13 = !{!10, !10, i64 0}
!14 = distinct !{!14, !15}
!15 = !{!"llvm.loop.mustprogress"}


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