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

; Function Attrs: nounwind uwtable
define dso_local void @arm_cmplx_mag_squared_f32(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 float, align 4
  %9 = alloca float, 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) #3
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #3
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #3
  %10 = load i32, ptr %6, align 4, !tbaa !9
  store i32 %10, ptr %7, align 4, !tbaa !9
  br label %11

11:                                               ; preds = %14, %3
  %12 = load i32, ptr %7, align 4, !tbaa !9
  %13 = icmp ugt i32 %12, 0
  br i1 %13, label %14, label %31

14:                                               ; preds = %11
  %15 = load ptr, ptr %4, align 8, !tbaa !5
  %16 = getelementptr inbounds float, ptr %15, i32 1
  store ptr %16, ptr %4, align 8, !tbaa !5
  %17 = load float, ptr %15, align 4, !tbaa !11
  store float %17, ptr %8, align 4, !tbaa !11
  %18 = load ptr, ptr %4, align 8, !tbaa !5
  %19 = getelementptr inbounds float, ptr %18, i32 1
  store ptr %19, ptr %4, align 8, !tbaa !5
  %20 = load float, ptr %18, align 4, !tbaa !11
  store float %20, ptr %9, align 4, !tbaa !11
  %21 = load float, ptr %8, align 4, !tbaa !11
  %22 = load float, ptr %8, align 4, !tbaa !11
  %23 = load float, ptr %9, align 4, !tbaa !11
  %24 = load float, ptr %9, align 4, !tbaa !11
  %25 = fmul float %23, %24
  %26 = call float @llvm.fmuladd.f32(float %21, float %22, float %25)
  %27 = load ptr, ptr %5, align 8, !tbaa !5
  %28 = getelementptr inbounds float, ptr %27, i32 1
  store ptr %28, ptr %5, align 8, !tbaa !5
  store float %26, ptr %27, align 4, !tbaa !11
  %29 = load i32, ptr %7, align 4, !tbaa !9
  %30 = add i32 %29, -1
  store i32 %30, ptr %7, align 4, !tbaa !9
  br label %11, !llvm.loop !13

31:                                               ; preds = %11
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #3
  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 speculatable willreturn memory(none)
declare float @llvm.fmuladd.f32(float, float, float) #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 nosync nounwind speculatable willreturn memory(none) }
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 = !{!"int", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"float", !7, i64 0}
!13 = distinct !{!13, !14}
!14 = !{!"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_f32(ptr nocapture noundef readonly %0, ptr nocapture noundef writeonly %1, i32 noundef %2) local_unnamed_addr #0 {
  %.not11 = icmp eq i32 %2, 0
  br i1 %.not11, label %._crit_edge, label %.lr.ph.preheader

.lr.ph.preheader:                                 ; preds = %3
  %4 = zext i32 %2 to i64
  %min.iters.check = icmp ult i32 %2, 8
  br i1 %min.iters.check, label %.lr.ph.preheader28, label %vector.memcheck

vector.memcheck:                                  ; preds = %.lr.ph.preheader
  %5 = add i32 %2, -1
  %6 = zext i32 %5 to i64
  %7 = shl nuw nsw i64 %6, 2
  %8 = getelementptr i8, ptr %1, i64 %7
  %scevgep = getelementptr i8, ptr %8, i64 4
  %9 = shl nuw nsw i64 %6, 3
  %10 = getelementptr i8, ptr %0, i64 %9
  %scevgep15 = getelementptr i8, ptr %10, i64 8
  %bound0 = icmp ugt ptr %scevgep15, %1
  %bound1 = icmp ugt ptr %scevgep, %0
  %found.conflict = and i1 %bound0, %bound1
  br i1 %found.conflict, label %.lr.ph.preheader28, label %vector.ph

vector.ph:                                        ; preds = %vector.memcheck
  %n.vec = and i64 %4, 4294967288
  %11 = shl nuw nsw i64 %n.vec, 3
  %ind.end = getelementptr i8, ptr %0, i64 %11
  %12 = shl nuw nsw i64 %n.vec, 2
  %ind.end16 = getelementptr i8, ptr %1, i64 %12
  %.cast = trunc nuw i64 %n.vec to i32
  %ind.end18 = sub i32 %2, %.cast
  br label %vector.body

vector.body:                                      ; preds = %vector.body, %vector.ph
  %index = phi i64 [ 0, %vector.ph ], [ %index.next, %vector.body ]
  %offset.idx = shl i64 %index, 3
  %13 = or disjoint i64 %offset.idx, 32
  %next.gep = getelementptr i8, ptr %0, i64 %offset.idx
  %next.gep20 = getelementptr i8, ptr %0, i64 %13
  %offset.idx21 = shl i64 %index, 2
  %next.gep22 = getelementptr i8, ptr %1, i64 %offset.idx21
  %wide.vec = load <8 x float>, ptr %next.gep, align 4, !tbaa !5
  %wide.vec24 = load <8 x float>, ptr %next.gep20, align 4, !tbaa !5
  %strided.vec = shufflevector <8 x float> %wide.vec, <8 x float> poison, <4 x i32> <i32 0, i32 2, i32 4, i32 6>
  %strided.vec25 = shufflevector <8 x float> %wide.vec24, <8 x float> poison, <4 x i32> <i32 0, i32 2, i32 4, i32 6>
  %14 = fmul <8 x float> %wide.vec, %wide.vec
  %15 = shufflevector <8 x float> %14, <8 x float> poison, <4 x i32> <i32 1, i32 3, i32 5, i32 7>
  %16 = fmul <8 x float> %wide.vec24, %wide.vec24
  %17 = shufflevector <8 x float> %16, <8 x float> poison, <4 x i32> <i32 1, i32 3, i32 5, i32 7>
  %18 = tail call <4 x float> @llvm.fmuladd.v4f32(<4 x float> %strided.vec, <4 x float> %strided.vec, <4 x float> %15)
  %19 = tail call <4 x float> @llvm.fmuladd.v4f32(<4 x float> %strided.vec25, <4 x float> %strided.vec25, <4 x float> %17)
  %20 = getelementptr i8, ptr %next.gep22, i64 16
  store <4 x float> %18, ptr %next.gep22, align 4, !tbaa !5, !alias.scope !9, !noalias !12
  store <4 x float> %19, ptr %20, align 4, !tbaa !5, !alias.scope !9, !noalias !12
  %index.next = add nuw i64 %index, 8
  %21 = icmp eq i64 %index.next, %n.vec
  br i1 %21, label %middle.block, label %vector.body, !llvm.loop !14

middle.block:                                     ; preds = %vector.body
  %cmp.n = icmp eq i64 %n.vec, %4
  br i1 %cmp.n, label %._crit_edge, label %.lr.ph.preheader28

.lr.ph.preheader28:                               ; preds = %middle.block, %vector.memcheck, %.lr.ph.preheader
  %.014.ph = phi ptr [ %0, %vector.memcheck ], [ %0, %.lr.ph.preheader ], [ %ind.end, %middle.block ]
  %.0913.ph = phi ptr [ %1, %vector.memcheck ], [ %1, %.lr.ph.preheader ], [ %ind.end16, %middle.block ]
  %.01012.ph = phi i32 [ %2, %vector.memcheck ], [ %2, %.lr.ph.preheader ], [ %ind.end18, %middle.block ]
  %xtraiter = and i32 %.01012.ph, 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.preheader28
  %22 = getelementptr inbounds i8, ptr %.014.ph, i64 4
  %23 = load float, ptr %.014.ph, align 4, !tbaa !5
  %24 = getelementptr inbounds i8, ptr %.014.ph, i64 8
  %25 = load float, ptr %22, align 4, !tbaa !5
  %26 = fmul float %25, %25
  %27 = tail call float @llvm.fmuladd.f32(float %23, float %23, float %26)
  %28 = getelementptr inbounds i8, ptr %.0913.ph, i64 4
  store float %27, ptr %.0913.ph, align 4, !tbaa !5
  %29 = add nsw i32 %.01012.ph, -1
  br label %.lr.ph.prol.loopexit

.lr.ph.prol.loopexit:                             ; preds = %.lr.ph.prol, %.lr.ph.preheader28
  %.014.unr = phi ptr [ %.014.ph, %.lr.ph.preheader28 ], [ %24, %.lr.ph.prol ]
  %.0913.unr = phi ptr [ %.0913.ph, %.lr.ph.preheader28 ], [ %28, %.lr.ph.prol ]
  %.01012.unr = phi i32 [ %.01012.ph, %.lr.ph.preheader28 ], [ %29, %.lr.ph.prol ]
  %30 = icmp eq i32 %.01012.ph, 1
  br i1 %30, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %.lr.ph.prol.loopexit, %.lr.ph
  %.014 = phi ptr [ %40, %.lr.ph ], [ %.014.unr, %.lr.ph.prol.loopexit ]
  %.0913 = phi ptr [ %44, %.lr.ph ], [ %.0913.unr, %.lr.ph.prol.loopexit ]
  %.01012 = phi i32 [ %45, %.lr.ph ], [ %.01012.unr, %.lr.ph.prol.loopexit ]
  %31 = getelementptr inbounds i8, ptr %.014, i64 4
  %32 = load float, ptr %.014, align 4, !tbaa !5
  %33 = getelementptr inbounds i8, ptr %.014, i64 8
  %34 = load float, ptr %31, align 4, !tbaa !5
  %35 = fmul float %34, %34
  %36 = tail call float @llvm.fmuladd.f32(float %32, float %32, float %35)
  %37 = getelementptr inbounds i8, ptr %.0913, i64 4
  store float %36, ptr %.0913, align 4, !tbaa !5
  %38 = getelementptr inbounds i8, ptr %.014, i64 12
  %39 = load float, ptr %33, align 4, !tbaa !5
  %40 = getelementptr inbounds i8, ptr %.014, i64 16
  %41 = load float, ptr %38, align 4, !tbaa !5
  %42 = fmul float %41, %41
  %43 = tail call float @llvm.fmuladd.f32(float %39, float %39, float %42)
  %44 = getelementptr inbounds i8, ptr %.0913, i64 8
  store float %43, ptr %37, align 4, !tbaa !5
  %45 = add i32 %.01012, -2
  %.not.1 = icmp eq i32 %45, 0
  br i1 %.not.1, label %._crit_edge, label %.lr.ph, !llvm.loop !18

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

; Function Attrs: mustprogress nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare float @llvm.fmuladd.f32(float, float, float) #1

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare <4 x float> @llvm.fmuladd.v4f32(<4 x float>, <4 x float>, <4 x float>) #2

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" }
attributes #1 = { mustprogress nocallback nofree nosync nounwind speculatable willreturn memory(none) }
attributes #2 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }

!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 = !{!"float", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10}
!10 = distinct !{!10, !11}
!11 = distinct !{!11, !"LVerDomain"}
!12 = !{!13}
!13 = distinct !{!13, !11}
!14 = distinct !{!14, !15, !16, !17}
!15 = !{!"llvm.loop.mustprogress"}
!16 = !{!"llvm.loop.isvectorized", i32 1}
!17 = !{!"llvm.loop.unroll.runtime.disable"}
!18 = distinct !{!18, !15, !16}


; Effective O3 passes: GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopLoadEliminationPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,LoopVectorizePass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass