; LLVM IR from FedericaPaoli1/stm32-speech-recognition-and-traduction :: Drivers/CMSIS/DSP/Source/FilteringFunctions (arm_fir_interpolate_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_interpolate_instance_f32 = type { i8, i16, ptr, ptr }

; Function Attrs: nounwind uwtable
define dso_local i32 @arm_fir_interpolate_init_f32(ptr noundef %0, i8 noundef zeroext %1, i16 noundef zeroext %2, ptr noundef %3, ptr noundef %4, i32 noundef %5) #0 {
  %7 = alloca ptr, align 8
  %8 = alloca i8, align 1
  %9 = alloca i16, align 2
  %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 i8 %1, ptr %8, align 1, !tbaa !9
  store i16 %2, ptr %9, align 2, !tbaa !10
  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 i16, ptr %9, align 2, !tbaa !10
  %15 = zext i16 %14 to i32
  %16 = load i8, ptr %8, align 1, !tbaa !9
  %17 = zext i8 %16 to i32
  %18 = srem i32 %15, %17
  %19 = icmp ne i32 %18, 0
  br i1 %19, label %20, label %21

20:                                               ; preds = %6
  store i32 -2, ptr %13, align 4, !tbaa !12
  br label %49

21:                                               ; preds = %6
  %22 = load ptr, ptr %10, align 8, !tbaa !5
  %23 = load ptr, ptr %7, align 8, !tbaa !5
  %24 = getelementptr inbounds %struct.arm_fir_interpolate_instance_f32, ptr %23, i32 0, i32 2
  store ptr %22, ptr %24, align 8, !tbaa !14
  %25 = load i8, ptr %8, align 1, !tbaa !9
  %26 = load ptr, ptr %7, align 8, !tbaa !5
  %27 = getelementptr inbounds %struct.arm_fir_interpolate_instance_f32, ptr %26, i32 0, i32 0
  store i8 %25, ptr %27, align 8, !tbaa !16
  %28 = load i16, ptr %9, align 2, !tbaa !10
  %29 = zext i16 %28 to i32
  %30 = load i8, ptr %8, align 1, !tbaa !9
  %31 = zext i8 %30 to i32
  %32 = sdiv i32 %29, %31
  %33 = trunc i32 %32 to i16
  %34 = load ptr, ptr %7, align 8, !tbaa !5
  %35 = getelementptr inbounds %struct.arm_fir_interpolate_instance_f32, ptr %34, i32 0, i32 1
  store i16 %33, ptr %35, align 2, !tbaa !17
  %36 = load ptr, ptr %11, align 8, !tbaa !5
  %37 = load i32, ptr %12, align 4, !tbaa !12
  %38 = load ptr, ptr %7, align 8, !tbaa !5
  %39 = getelementptr inbounds %struct.arm_fir_interpolate_instance_f32, ptr %38, i32 0, i32 1
  %40 = load i16, ptr %39, align 2, !tbaa !17
  %41 = zext i16 %40 to i32
  %42 = sub i32 %41, 1
  %43 = add i32 %37, %42
  %44 = zext i32 %43 to i64
  %45 = mul i64 %44, 4
  call void @llvm.memset.p0.i64(ptr align 4 %36, i8 0, i64 %45, i1 false)
  %46 = load ptr, ptr %11, align 8, !tbaa !5
  %47 = load ptr, ptr %7, align 8, !tbaa !5
  %48 = getelementptr inbounds %struct.arm_fir_interpolate_instance_f32, ptr %47, i32 0, i32 3
  store ptr %46, ptr %48, align 8, !tbaa !18
  store i32 0, ptr %13, align 4, !tbaa !12
  br label %49

49:                                               ; preds = %21, %20
  %50 = load i32, ptr %13, align 4, !tbaa !12
  call void @llvm.lifetime.end.p0(i64 4, ptr %13) #3
  ret i32 %50
}

; 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 = !{!7, !7, i64 0}
!10 = !{!11, !11, i64 0}
!11 = !{!"short", !7, i64 0}
!12 = !{!13, !13, i64 0}
!13 = !{!"int", !7, i64 0}
!14 = !{!15, !6, i64 8}
!15 = !{!"", !7, i64 0, !11, i64 2, !6, i64 8, !6, i64 16}
!16 = !{!15, !7, i64 0}
!17 = !{!15, !11, i64 2}
!18 = !{!15, !6, 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 norecurse nosync nounwind willreturn memory(argmem: write) uwtable
define dso_local range(i32 -2, 1) i32 @arm_fir_interpolate_init_f32(ptr nocapture noundef writeonly %0, i8 noundef zeroext %1, i16 noundef zeroext %2, ptr noundef %3, ptr noundef %4, i32 noundef %5) local_unnamed_addr #0 {
  %.rhs.trunc = zext i8 %1 to i16
  %7 = urem i16 %2, %.rhs.trunc
  %8 = udiv i16 %2, %.rhs.trunc
  %.not = icmp eq i16 %7, 0
  br i1 %.not, label %9, label %17

9:                                                ; preds = %6
  %10 = getelementptr inbounds i8, ptr %0, i64 8
  store ptr %3, ptr %10, align 8, !tbaa !5
  store i8 %1, ptr %0, align 8, !tbaa !11
  %.zext16 = zext i16 %8 to i32
  %11 = getelementptr inbounds i8, ptr %0, i64 2
  store i16 %8, ptr %11, align 2, !tbaa !12
  %12 = add i32 %5, -1
  %13 = add i32 %12, %.zext16
  %14 = zext i32 %13 to i64
  %15 = shl nuw nsw i64 %14, 2
  tail call void @llvm.memset.p0.i64(ptr align 4 %4, i8 0, i64 %15, i1 false)
  %16 = getelementptr inbounds i8, ptr %0, i64 16
  store ptr %4, ptr %16, align 8, !tbaa !13
  br label %17

17:                                               ; 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, !10, i64 8}
!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, !7, i64 0}
!12 = !{!6, !9, i64 2}
!13 = !{!6, !10, i64 16}


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