; LLVM IR from FedericaPaoli1/stm32-speech-recognition-and-traduction :: Drivers/CMSIS/DSP/Source/ComplexMathFunctions (arm_cmplx_mult_real_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_mult_real_f32(ptr noundef %0, ptr noundef %1, ptr noundef %2, i32 noundef %3) #0 {
  %5 = alloca ptr, align 8
  %6 = alloca ptr, align 8
  %7 = alloca ptr, align 8
  %8 = alloca i32, align 4
  %9 = alloca i32, align 4
  %10 = alloca float, align 4
  store ptr %0, ptr %5, align 8, !tbaa !5
  store ptr %1, ptr %6, align 8, !tbaa !5
  store ptr %2, ptr %7, align 8, !tbaa !5
  store i32 %3, ptr %8, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #2
  call void @llvm.lifetime.start.p0(i64 4, ptr %10) #2
  %11 = load i32, ptr %8, align 4, !tbaa !9
  store i32 %11, ptr %9, align 4, !tbaa !9
  br label %12

12:                                               ; preds = %15, %4
  %13 = load i32, ptr %9, align 4, !tbaa !9
  %14 = icmp ugt i32 %13, 0
  br i1 %14, label %15, label %35

15:                                               ; preds = %12
  %16 = load ptr, ptr %6, align 8, !tbaa !5
  %17 = getelementptr inbounds float, ptr %16, i32 1
  store ptr %17, ptr %6, align 8, !tbaa !5
  %18 = load float, ptr %16, align 4, !tbaa !11
  store float %18, ptr %10, align 4, !tbaa !11
  %19 = load ptr, ptr %5, align 8, !tbaa !5
  %20 = getelementptr inbounds float, ptr %19, i32 1
  store ptr %20, ptr %5, align 8, !tbaa !5
  %21 = load float, ptr %19, align 4, !tbaa !11
  %22 = load float, ptr %10, align 4, !tbaa !11
  %23 = fmul float %21, %22
  %24 = load ptr, ptr %7, align 8, !tbaa !5
  %25 = getelementptr inbounds float, ptr %24, i32 1
  store ptr %25, ptr %7, align 8, !tbaa !5
  store float %23, ptr %24, align 4, !tbaa !11
  %26 = load ptr, ptr %5, align 8, !tbaa !5
  %27 = getelementptr inbounds float, ptr %26, i32 1
  store ptr %27, ptr %5, align 8, !tbaa !5
  %28 = load float, ptr %26, align 4, !tbaa !11
  %29 = load float, ptr %10, align 4, !tbaa !11
  %30 = fmul float %28, %29
  %31 = load ptr, ptr %7, align 8, !tbaa !5
  %32 = getelementptr inbounds float, ptr %31, i32 1
  store ptr %32, ptr %7, align 8, !tbaa !5
  store float %30, ptr %31, align 4, !tbaa !11
  %33 = load i32, ptr %9, align 4, !tbaa !9
  %34 = add i32 %33, -1
  store i32 %34, ptr %9, align 4, !tbaa !9
  br label %12, !llvm.loop !13

35:                                               ; preds = %12
  call void @llvm.lifetime.end.p0(i64 4, ptr %10) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #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 = !{!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_mult_real_f32(ptr nocapture noundef readonly %0, ptr nocapture noundef readonly %1, ptr nocapture noundef writeonly %2, i32 noundef %3) local_unnamed_addr #0 {
  %.not12 = icmp eq i32 %3, 0
  br i1 %.not12, label %._crit_edge, label %.lr.ph.preheader

.lr.ph.preheader:                                 ; preds = %4
  %5 = zext i32 %3 to i64
  %min.iters.check = icmp ult i32 %3, 12
  br i1 %min.iters.check, label %.lr.ph.preheader33, label %vector.memcheck

vector.memcheck:                                  ; preds = %.lr.ph.preheader
  %6 = add i32 %3, -1
  %7 = zext i32 %6 to i64
  %8 = shl nuw nsw i64 %7, 3
  %9 = add nuw nsw i64 %8, 8
  %scevgep = getelementptr i8, ptr %2, i64 %9
  %10 = shl nuw nsw i64 %7, 2
  %11 = getelementptr i8, ptr %1, i64 %10
  %scevgep17 = getelementptr i8, ptr %11, i64 4
  %scevgep18 = getelementptr i8, ptr %0, i64 %9
  %bound0 = icmp ugt ptr %scevgep17, %2
  %bound1 = icmp ugt ptr %scevgep, %1
  %found.conflict = and i1 %bound0, %bound1
  %bound019 = icmp ugt ptr %scevgep18, %2
  %bound120 = icmp ugt ptr %scevgep, %0
  %found.conflict21 = and i1 %bound019, %bound120
  %conflict.rdx = or i1 %found.conflict, %found.conflict21
  br i1 %conflict.rdx, label %.lr.ph.preheader33, label %vector.ph

vector.ph:                                        ; preds = %vector.memcheck
  %n.vec = and i64 %5, 4294967294
  %12 = shl nuw nsw i64 %n.vec, 3
  %ind.end = getelementptr i8, ptr %0, i64 %12
  %.cast = trunc nuw i64 %n.vec to i32
  %ind.end22 = sub i32 %3, %.cast
  %13 = shl nuw nsw i64 %n.vec, 2
  %ind.end24 = getelementptr i8, ptr %1, i64 %13
  %14 = shl nuw nsw i64 %n.vec, 3
  %ind.end26 = getelementptr i8, ptr %2, i64 %14
  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
  %next.gep = getelementptr i8, ptr %0, i64 %offset.idx
  %offset.idx28 = shl i64 %index, 2
  %next.gep29 = getelementptr i8, ptr %1, i64 %offset.idx28
  %offset.idx30 = shl i64 %index, 3
  %next.gep31 = getelementptr i8, ptr %2, i64 %offset.idx30
  %wide.load = load <2 x float>, ptr %next.gep29, align 4, !tbaa !5, !alias.scope !9
  %15 = load <4 x float>, ptr %next.gep, align 4, !tbaa !5
  %16 = shufflevector <2 x float> %wide.load, <2 x float> poison, <4 x i32> <i32 0, i32 0, i32 1, i32 1>
  %interleaved.vec = fmul <4 x float> %16, %15
  store <4 x float> %interleaved.vec, ptr %next.gep31, align 4, !tbaa !5
  %index.next = add nuw i64 %index, 2
  %17 = icmp eq i64 %index.next, %n.vec
  br i1 %17, label %middle.block, label %vector.body, !llvm.loop !12

middle.block:                                     ; preds = %vector.body
  %cmp.n = icmp eq i64 %n.vec, %5
  br i1 %cmp.n, label %._crit_edge, label %.lr.ph.preheader33

.lr.ph.preheader33:                               ; preds = %middle.block, %vector.memcheck, %.lr.ph.preheader
  %.016.ph = phi ptr [ %0, %vector.memcheck ], [ %0, %.lr.ph.preheader ], [ %ind.end, %middle.block ]
  %.0915.ph = phi i32 [ %3, %vector.memcheck ], [ %3, %.lr.ph.preheader ], [ %ind.end22, %middle.block ]
  %.01014.ph = phi ptr [ %1, %vector.memcheck ], [ %1, %.lr.ph.preheader ], [ %ind.end24, %middle.block ]
  %.01113.ph = phi ptr [ %2, %vector.memcheck ], [ %2, %.lr.ph.preheader ], [ %ind.end26, %middle.block ]
  %xtraiter = and i32 %.0915.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.preheader33
  %18 = getelementptr inbounds i8, ptr %.01014.ph, i64 4
  %19 = load float, ptr %.01014.ph, align 4, !tbaa !5
  %20 = getelementptr inbounds i8, ptr %.016.ph, i64 4
  %21 = load float, ptr %.016.ph, align 4, !tbaa !5
  %22 = fmul float %19, %21
  %23 = getelementptr inbounds i8, ptr %.01113.ph, i64 4
  store float %22, ptr %.01113.ph, align 4, !tbaa !5
  %24 = getelementptr inbounds i8, ptr %.016.ph, i64 8
  %25 = load float, ptr %20, align 4, !tbaa !5
  %26 = fmul float %19, %25
  %27 = getelementptr inbounds i8, ptr %.01113.ph, i64 8
  store float %26, ptr %23, align 4, !tbaa !5
  %28 = add nsw i32 %.0915.ph, -1
  br label %.lr.ph.prol.loopexit

.lr.ph.prol.loopexit:                             ; preds = %.lr.ph.prol, %.lr.ph.preheader33
  %.016.unr = phi ptr [ %.016.ph, %.lr.ph.preheader33 ], [ %24, %.lr.ph.prol ]
  %.0915.unr = phi i32 [ %.0915.ph, %.lr.ph.preheader33 ], [ %28, %.lr.ph.prol ]
  %.01014.unr = phi ptr [ %.01014.ph, %.lr.ph.preheader33 ], [ %18, %.lr.ph.prol ]
  %.01113.unr = phi ptr [ %.01113.ph, %.lr.ph.preheader33 ], [ %27, %.lr.ph.prol ]
  %29 = icmp eq i32 %.0915.ph, 1
  br i1 %29, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %.lr.ph.prol.loopexit, %.lr.ph
  %.016 = phi ptr [ %46, %.lr.ph ], [ %.016.unr, %.lr.ph.prol.loopexit ]
  %.0915 = phi i32 [ %50, %.lr.ph ], [ %.0915.unr, %.lr.ph.prol.loopexit ]
  %.01014 = phi ptr [ %40, %.lr.ph ], [ %.01014.unr, %.lr.ph.prol.loopexit ]
  %.01113 = phi ptr [ %49, %.lr.ph ], [ %.01113.unr, %.lr.ph.prol.loopexit ]
  %30 = getelementptr inbounds i8, ptr %.01014, i64 4
  %31 = load float, ptr %.01014, align 4, !tbaa !5
  %32 = getelementptr inbounds i8, ptr %.016, i64 4
  %33 = load float, ptr %.016, align 4, !tbaa !5
  %34 = fmul float %31, %33
  %35 = getelementptr inbounds i8, ptr %.01113, i64 4
  store float %34, ptr %.01113, align 4, !tbaa !5
  %36 = getelementptr inbounds i8, ptr %.016, i64 8
  %37 = load float, ptr %32, align 4, !tbaa !5
  %38 = fmul float %31, %37
  %39 = getelementptr inbounds i8, ptr %.01113, i64 8
  store float %38, ptr %35, align 4, !tbaa !5
  %40 = getelementptr inbounds i8, ptr %.01014, i64 8
  %41 = load float, ptr %30, align 4, !tbaa !5
  %42 = getelementptr inbounds i8, ptr %.016, i64 12
  %43 = load float, ptr %36, align 4, !tbaa !5
  %44 = fmul float %41, %43
  %45 = getelementptr inbounds i8, ptr %.01113, i64 12
  store float %44, ptr %39, align 4, !tbaa !5
  %46 = getelementptr inbounds i8, ptr %.016, i64 16
  %47 = load float, ptr %42, align 4, !tbaa !5
  %48 = fmul float %41, %47
  %49 = getelementptr inbounds i8, ptr %.01113, i64 16
  store float %48, ptr %45, align 4, !tbaa !5
  %50 = add i32 %.0915, -2
  %.not.1 = icmp eq i32 %50, 0
  br i1 %.not.1, label %._crit_edge, label %.lr.ph, !llvm.loop !16

._crit_edge:                                      ; preds = %.lr.ph.prol.loopexit, %.lr.ph, %middle.block, %4
  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 = !{!"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 = distinct !{!12, !13, !14, !15}
!13 = !{!"llvm.loop.mustprogress"}
!14 = !{!"llvm.loop.isvectorized", i32 1}
!15 = !{!"llvm.loop.unroll.runtime.disable"}
!16 = distinct !{!16, !13, !14}


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