; LLVM IR from FedericaPaoli1/stm32-speech-recognition-and-traduction :: Drivers/CMSIS/DSP/Source/FilteringFunctions (arm_fir_decimate_init_f32)

; 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.arm_fir_decimate_instance_f32 = type { i8, i16, ptr, ptr }

; Function Attrs: nounwind uwtable
define dso_local i32 @arm_fir_decimate_init_f32(ptr noundef %0, i16 noundef zeroext %1, i8 noundef zeroext %2, ptr noundef %3, ptr noundef %4, i32 noundef %5) #0 {
  %7 = alloca ptr, align 8
  %8 = alloca i16, align 2
  %9 = alloca i8, align 1
  %10 = alloca ptr, align 8
  %11 = alloca ptr, align 8
  %12 = alloca i32, align 4
  %13 = alloca i32, align 4
  store ptr %0, ptr %7, align 8, !tbaa !5
  store i16 %1, ptr %8, align 2, !tbaa !9
  store i8 %2, ptr %9, align 1, !tbaa !11
  store ptr %3, ptr %10, align 8, !tbaa !5
  store ptr %4, ptr %11, align 8, !tbaa !5
  store i32 %5, ptr %12, align 4, !tbaa !12
  call void @llvm.lifetime.start.p0(i64 4, ptr %13) #3
  %14 = load i32, ptr %12, align 4, !tbaa !12
  %15 = load i8, ptr %9, align 1, !tbaa !11
  %16 = zext i8 %15 to i32
  %17 = urem i32 %14, %16
  %18 = icmp ne i32 %17, 0
  br i1 %18, label %19, label %20

19:                                               ; preds = %6
  store i32 -2, ptr %13, align 4, !tbaa !12
  br label %41

20:                                               ; preds = %6
  %21 = load i16, ptr %8, align 2, !tbaa !9
  %22 = load ptr, ptr %7, align 8, !tbaa !5
  %23 = getelementptr inbounds %struct.arm_fir_decimate_instance_f32, ptr %22, i32 0, i32 1
  store i16 %21, ptr %23, align 2, !tbaa !14
  %24 = load ptr, ptr %10, align 8, !tbaa !5
  %25 = load ptr, ptr %7, align 8, !tbaa !5
  %26 = getelementptr inbounds %struct.arm_fir_decimate_instance_f32, ptr %25, i32 0, i32 2
  store ptr %24, ptr %26, align 8, !tbaa !16
  %27 = load ptr, ptr %11, align 8, !tbaa !5
  %28 = load i16, ptr %8, align 2, !tbaa !9
  %29 = zext i16 %28 to i32
  %30 = load i32, ptr %12, align 4, !tbaa !12
  %31 = sub i32 %30, 1
  %32 = add i32 %29, %31
  %33 = zext i32 %32 to i64
  %34 = mul i64 %33, 4
  call void @llvm.memset.p0.i64(ptr align 4 %27, i8 0, i64 %34, i1 false)
  %35 = load ptr, ptr %11, align 8, !tbaa !5
  %36 = load ptr, ptr %7, align 8, !tbaa !5
  %37 = getelementptr inbounds %struct.arm_fir_decimate_instance_f32, ptr %36, i32 0, i32 3
  store ptr %35, ptr %37, align 8, !tbaa !17
  %38 = load i8, ptr %9, align 1, !tbaa !11
  %39 = load ptr, ptr %7, align 8, !tbaa !5
  %40 = getelementptr inbounds %struct.arm_fir_decimate_instance_f32, ptr %39, i32 0, i32 0
  store i8 %38, ptr %40, align 8, !tbaa !18
  store i32 0, ptr %13, align 4, !tbaa !12
  br label %41

41:                                               ; preds = %20, %19
  %42 = load i32, ptr %13, align 4, !tbaa !12
  call void @llvm.lifetime.end.p0(i64 4, ptr %13) #3
  ret i32 %42
}

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

; 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 = { nocallback nofree nounwind willreturn memory(argmem: write) }
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 = !{!"short", !7, i64 0}
!11 = !{!7, !7, i64 0}
!12 = !{!13, !13, i64 0}
!13 = !{!"int", !7, i64 0}
!14 = !{!15, !10, i64 2}
!15 = !{!"", !7, i64 0, !10, i64 2, !6, i64 8, !6, i64 16}
!16 = !{!15, !6, i64 8}
!17 = !{!15, !6, i64 16}
!18 = !{!15, !7, i64 0}


; 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 willreturn memory(argmem: write) uwtable
define dso_local range(i32 -2, 1) i32 @arm_fir_decimate_init_f32(ptr nocapture noundef writeonly %0, i16 noundef zeroext %1, i8 noundef zeroext %2, ptr noundef %3, ptr noundef %4, i32 noundef %5) local_unnamed_addr #0 {
  %7 = zext i8 %2 to i32
  %8 = urem i32 %5, %7
  %.not = icmp eq i32 %8, 0
  br i1 %.not, label %9, label %18

9:                                                ; preds = %6
  %10 = getelementptr inbounds i8, ptr %0, i64 2
  store i16 %1, ptr %10, align 2, !tbaa !5
  %11 = getelementptr inbounds i8, ptr %0, i64 8
  store ptr %3, ptr %11, align 8, !tbaa !11
  %12 = zext i16 %1 to i32
  %13 = add nsw i32 %12, -1
  %14 = add i32 %13, %5
  %15 = zext i32 %14 to i64
  %16 = shl nuw nsw i64 %15, 2
  tail call void @llvm.memset.p0.i64(ptr align 4 %4, i8 0, i64 %16, i1 false)
  %17 = getelementptr inbounds i8, ptr %0, i64 16
  store ptr %4, ptr %17, align 8, !tbaa !12
  store i8 %2, ptr %0, align 8, !tbaa !13
  br label %18

18:                                               ; preds = %6, %9
  %.0 = phi i32 [ 0, %9 ], [ -2, %6 ]
  ret i32 %.0
}

; Function Attrs: mustprogress nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #1

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(argmem: write) 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 nocallback nofree nounwind willreturn memory(argmem: write) }

!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, !9, i64 2}
!6 = !{!"", !7, i64 0, !9, i64 2, !10, i64 8, !10, i64 16}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!"short", !7, i64 0}
!10 = !{!"any pointer", !7, i64 0}
!11 = !{!6, !10, i64 8}
!12 = !{!6, !10, i64 16}
!13 = !{!6, !7, i64 0}


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