; LLVM IR from FedericaPaoli1/stm32-speech-recognition-and-traduction :: Drivers/CMSIS/DSP/Source/ComplexMathFunctions (arm_cmplx_mag_squared_q31)

; 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: nounwind uwtable
define dso_local void @arm_cmplx_mag_squared_q31(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 i32, align 4
  %9 = alloca i32, align 4
  %10 = alloca i32, align 4
  %11 = 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
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #2
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #2
  call void @llvm.lifetime.start.p0(i64 4, ptr %10) #2
  call void @llvm.lifetime.start.p0(i64 4, ptr %11) #2
  %12 = load i32, ptr %6, align 4, !tbaa !9
  store i32 %12, ptr %7, align 4, !tbaa !9
  br label %13

13:                                               ; preds = %16, %3
  %14 = load i32, ptr %7, align 4, !tbaa !9
  %15 = icmp ugt i32 %14, 0
  br i1 %15, label %16, label %44

16:                                               ; preds = %13
  %17 = load ptr, ptr %4, align 8, !tbaa !5
  %18 = getelementptr inbounds i32, ptr %17, i32 1
  store ptr %18, ptr %4, align 8, !tbaa !5
  %19 = load i32, ptr %17, align 4, !tbaa !9
  store i32 %19, ptr %8, align 4, !tbaa !9
  %20 = load ptr, ptr %4, align 8, !tbaa !5
  %21 = getelementptr inbounds i32, ptr %20, i32 1
  store ptr %21, ptr %4, align 8, !tbaa !5
  %22 = load i32, ptr %20, align 4, !tbaa !9
  store i32 %22, ptr %9, align 4, !tbaa !9
  %23 = load i32, ptr %8, align 4, !tbaa !9
  %24 = sext i32 %23 to i64
  %25 = load i32, ptr %8, align 4, !tbaa !9
  %26 = sext i32 %25 to i64
  %27 = mul nsw i64 %24, %26
  %28 = ashr i64 %27, 33
  %29 = trunc i64 %28 to i32
  store i32 %29, ptr %10, align 4, !tbaa !9
  %30 = load i32, ptr %9, align 4, !tbaa !9
  %31 = sext i32 %30 to i64
  %32 = load i32, ptr %9, align 4, !tbaa !9
  %33 = sext i32 %32 to i64
  %34 = mul nsw i64 %31, %33
  %35 = ashr i64 %34, 33
  %36 = trunc i64 %35 to i32
  store i32 %36, ptr %11, align 4, !tbaa !9
  %37 = load i32, ptr %10, align 4, !tbaa !9
  %38 = load i32, ptr %11, align 4, !tbaa !9
  %39 = add nsw i32 %37, %38
  %40 = load ptr, ptr %5, align 8, !tbaa !5
  %41 = getelementptr inbounds i32, ptr %40, i32 1
  store ptr %41, ptr %5, align 8, !tbaa !5
  store i32 %39, ptr %40, align 4, !tbaa !9
  %42 = load i32, ptr %7, align 4, !tbaa !9
  %43 = add i32 %42, -1
  store i32 %43, ptr %7, align 4, !tbaa !9
  br label %13, !llvm.loop !11

44:                                               ; preds = %13
  call void @llvm.lifetime.end.p0(i64 4, ptr %11) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %10) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #2
  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 = { 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/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"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 norecurse nosync nounwind memory(readwrite, inaccessiblemem: none) uwtable
define dso_local void @arm_cmplx_mag_squared_q31(ptr nocapture noundef readonly %0, ptr nocapture noundef writeonly %1, i32 noundef %2) local_unnamed_addr #0 {
  %.not13 = icmp eq i32 %2, 0
  br i1 %.not13, label %._crit_edge, label %.lr.ph.preheader

.lr.ph.preheader:                                 ; preds = %3
  %xtraiter = and i32 %2, 1
  %lcmp.mod.not = icmp eq i32 %xtraiter, 0
  br i1 %lcmp.mod.not, label %.lr.ph.prol.loopexit, label %.lr.ph.prol

.lr.ph.prol:                                      ; preds = %.lr.ph.preheader
  %4 = getelementptr inbounds i8, ptr %0, i64 4
  %5 = load i32, ptr %0, align 4, !tbaa !5
  %6 = getelementptr inbounds i8, ptr %0, i64 8
  %7 = load i32, ptr %4, align 4, !tbaa !5
  %8 = sext i32 %5 to i64
  %9 = mul nsw i64 %8, %8
  %10 = lshr i64 %9, 33
  %11 = trunc nuw nsw i64 %10 to i32
  %12 = sext i32 %7 to i64
  %13 = mul nsw i64 %12, %12
  %14 = lshr i64 %13, 33
  %15 = trunc nuw nsw i64 %14 to i32
  %16 = add nuw nsw i32 %15, %11
  %17 = getelementptr inbounds i8, ptr %1, i64 4
  store i32 %16, ptr %1, align 4, !tbaa !5
  %18 = add nsw i32 %2, -1
  br label %.lr.ph.prol.loopexit

.lr.ph.prol.loopexit:                             ; preds = %.lr.ph.prol, %.lr.ph.preheader
  %.016.unr = phi ptr [ %0, %.lr.ph.preheader ], [ %6, %.lr.ph.prol ]
  %.01115.unr = phi ptr [ %1, %.lr.ph.preheader ], [ %17, %.lr.ph.prol ]
  %.01214.unr = phi i32 [ %2, %.lr.ph.preheader ], [ %18, %.lr.ph.prol ]
  %19 = icmp eq i32 %2, 1
  br i1 %19, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %.lr.ph.prol.loopexit, %.lr.ph
  %.016 = phi ptr [ %36, %.lr.ph ], [ %.016.unr, %.lr.ph.prol.loopexit ]
  %.01115 = phi ptr [ %47, %.lr.ph ], [ %.01115.unr, %.lr.ph.prol.loopexit ]
  %.01214 = phi i32 [ %48, %.lr.ph ], [ %.01214.unr, %.lr.ph.prol.loopexit ]
  %20 = getelementptr inbounds i8, ptr %.016, i64 4
  %21 = load i32, ptr %.016, align 4, !tbaa !5
  %22 = getelementptr inbounds i8, ptr %.016, i64 8
  %23 = load i32, ptr %20, align 4, !tbaa !5
  %24 = sext i32 %21 to i64
  %25 = mul nsw i64 %24, %24
  %26 = lshr i64 %25, 33
  %27 = trunc nuw nsw i64 %26 to i32
  %28 = sext i32 %23 to i64
  %29 = mul nsw i64 %28, %28
  %30 = lshr i64 %29, 33
  %31 = trunc nuw nsw i64 %30 to i32
  %32 = add nuw nsw i32 %31, %27
  %33 = getelementptr inbounds i8, ptr %.01115, i64 4
  store i32 %32, ptr %.01115, align 4, !tbaa !5
  %34 = getelementptr inbounds i8, ptr %.016, i64 12
  %35 = load i32, ptr %22, align 4, !tbaa !5
  %36 = getelementptr inbounds i8, ptr %.016, i64 16
  %37 = load i32, ptr %34, align 4, !tbaa !5
  %38 = sext i32 %35 to i64
  %39 = mul nsw i64 %38, %38
  %40 = lshr i64 %39, 33
  %41 = trunc nuw nsw i64 %40 to i32
  %42 = sext i32 %37 to i64
  %43 = mul nsw i64 %42, %42
  %44 = lshr i64 %43, 33
  %45 = trunc nuw nsw i64 %44 to i32
  %46 = add nuw nsw i32 %45, %41
  %47 = getelementptr inbounds i8, ptr %.01115, i64 8
  store i32 %46, ptr %33, align 4, !tbaa !5
  %48 = add i32 %.01214, -2
  %.not.1 = icmp eq i32 %48, 0
  br i1 %.not.1, label %._crit_edge, label %.lr.ph, !llvm.loop !9

._crit_edge:                                      ; preds = %.lr.ph.prol.loopexit, %.lr.ph, %3
  ret void
}

attributes #0 = { nofree norecurse nosync nounwind memory(readwrite, inaccessiblemem: none) 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" }

!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 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass