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

; 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.taus_obj = type { i32, i32, ptr, ptr }

; Function Attrs: nounwind uwtable
define dso_local ptr @taus_construct_zero(i32 noundef %0, i32 noundef %1) #0 {
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca ptr, align 8
  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
  %6 = call noalias ptr @malloc(i64 noundef 24) #5
  store ptr %6, ptr %5, align 8, !tbaa !9
  %7 = load i32, ptr %3, align 4, !tbaa !5
  %8 = load ptr, ptr %5, align 8, !tbaa !9
  %9 = getelementptr inbounds %struct.taus_obj, ptr %8, i32 0, i32 0
  store i32 %7, ptr %9, align 8, !tbaa !11
  %10 = load i32, ptr %4, align 4, !tbaa !5
  %11 = load ptr, ptr %5, align 8, !tbaa !9
  %12 = getelementptr inbounds %struct.taus_obj, ptr %11, i32 0, i32 1
  store i32 %10, ptr %12, align 4, !tbaa !13
  %13 = load i32, ptr %3, align 4, !tbaa !5
  %14 = zext i32 %13 to i64
  %15 = mul i64 4, %14
  %16 = load i32, ptr %4, align 4, !tbaa !5
  %17 = zext i32 %16 to i64
  %18 = mul i64 %15, %17
  %19 = call noalias ptr @malloc(i64 noundef %18) #5
  %20 = load ptr, ptr %5, align 8, !tbaa !9
  %21 = getelementptr inbounds %struct.taus_obj, ptr %20, i32 0, i32 2
  store ptr %19, ptr %21, align 8, !tbaa !14
  %22 = load ptr, ptr %5, align 8, !tbaa !9
  %23 = getelementptr inbounds %struct.taus_obj, ptr %22, i32 0, i32 2
  %24 = load ptr, ptr %23, align 8, !tbaa !14
  %25 = load i32, ptr %3, align 4, !tbaa !5
  %26 = zext i32 %25 to i64
  %27 = mul i64 4, %26
  %28 = load i32, ptr %4, align 4, !tbaa !5
  %29 = zext i32 %28 to i64
  %30 = mul i64 %27, %29
  call void @llvm.memset.p0.i64(ptr align 4 %24, i8 0, i64 %30, i1 false)
  %31 = load i32, ptr %3, align 4, !tbaa !5
  %32 = zext i32 %31 to i64
  %33 = mul i64 4, %32
  %34 = load i32, ptr %4, align 4, !tbaa !5
  %35 = zext i32 %34 to i64
  %36 = mul i64 %33, %35
  %37 = call noalias ptr @malloc(i64 noundef %36) #5
  %38 = load ptr, ptr %5, align 8, !tbaa !9
  %39 = getelementptr inbounds %struct.taus_obj, ptr %38, i32 0, i32 3
  store ptr %37, ptr %39, align 8, !tbaa !15
  %40 = load ptr, ptr %5, align 8, !tbaa !9
  %41 = getelementptr inbounds %struct.taus_obj, ptr %40, i32 0, i32 3
  %42 = load ptr, ptr %41, align 8, !tbaa !15
  %43 = load i32, ptr %3, align 4, !tbaa !5
  %44 = zext i32 %43 to i64
  %45 = mul i64 4, %44
  %46 = load i32, ptr %4, align 4, !tbaa !5
  %47 = zext i32 %46 to i64
  %48 = mul i64 %45, %47
  call void @llvm.memset.p0.i64(ptr align 4 %42, i8 0, i64 %48, i1 false)
  %49 = load ptr, ptr %5, align 8, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #4
  ret ptr %49
}

; 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 = !{!"taus_obj", !6, i64 0, !6, i64 4, !10, i64 8, !10, i64 16}
!13 = !{!12, !6, i64 4}
!14 = !{!12, !10, i64 8}
!15 = !{!12, !10, i64 16}


; 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 nounwind willreturn memory(write, argmem: none, inaccessiblemem: readwrite) uwtable
define dso_local noalias noundef ptr @taus_construct_zero(i32 noundef %0, i32 noundef %1) local_unnamed_addr #0 {
  %3 = tail call noalias dereferenceable_or_null(24) ptr @malloc(i64 noundef 24) #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, 2
  %7 = zext i32 %1 to i64
  %8 = mul i64 %6, %7
  %calloc = tail call ptr @calloc(i64 1, i64 %8)
  %9 = getelementptr inbounds i8, ptr %3, i64 8
  store ptr %calloc, ptr %9, align 8, !tbaa !12
  %calloc16 = tail call ptr @calloc(i64 1, i64 %8)
  %10 = getelementptr inbounds i8, ptr %3, i64 16
  store ptr %calloc16, ptr %10, align 8, !tbaa !13
  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: nofree nounwind willreturn allockind("alloc,zeroed") allocsize(0,1) memory(inaccessiblemem: readwrite)
declare noalias noundef ptr @calloc(i64 noundef, i64 noundef) local_unnamed_addr #2

attributes #0 = { mustprogress nofree nounwind willreturn 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 = { nofree nounwind willreturn allockind("alloc,zeroed") allocsize(0,1) memory(inaccessiblemem: readwrite) "alloc-family"="malloc" }
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 = !{!"taus_obj", !7, i64 0, !7, i64 4, !10, i64 8, !10, i64 16}
!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 = !{!6, !10, i64 16}


; Effective O3 passes: DSEPass,EarlyCSEPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,PostOrderFunctionAttrsPass,SROAPass,TailCallElimPass