; LLVM IR from FedericaPaoli1/stm32-speech-recognition-and-traduction :: Drivers/CMSIS/DSP/Source/DistanceFunctions (arm_braycurtis_distance_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 float @arm_braycurtis_distance_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 float, align 4
  %8 = alloca float, align 4
  %9 = alloca float, align 4
  %10 = 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
  store float 0.000000e+00, ptr %7, align 4, !tbaa !11
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #3
  store float 0.000000e+00, ptr %8, align 4, !tbaa !11
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #3
  call void @llvm.lifetime.start.p0(i64 4, ptr %10) #3
  br label %11

11:                                               ; preds = %14, %3
  %12 = load i32, ptr %6, align 4, !tbaa !9
  %13 = icmp ugt i32 %12, 0
  br i1 %13, label %14, label %35

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 %9, align 4, !tbaa !11
  %18 = load ptr, ptr %5, align 8, !tbaa !5
  %19 = getelementptr inbounds float, ptr %18, i32 1
  store ptr %19, ptr %5, align 8, !tbaa !5
  %20 = load float, ptr %18, align 4, !tbaa !11
  store float %20, ptr %10, align 4, !tbaa !11
  %21 = load float, ptr %9, align 4, !tbaa !11
  %22 = load float, ptr %10, align 4, !tbaa !11
  %23 = fsub float %21, %22
  %24 = call float @llvm.fabs.f32(float %23)
  %25 = load float, ptr %7, align 4, !tbaa !11
  %26 = fadd float %25, %24
  store float %26, ptr %7, align 4, !tbaa !11
  %27 = load float, ptr %9, align 4, !tbaa !11
  %28 = load float, ptr %10, align 4, !tbaa !11
  %29 = fadd float %27, %28
  %30 = call float @llvm.fabs.f32(float %29)
  %31 = load float, ptr %8, align 4, !tbaa !11
  %32 = fadd float %31, %30
  store float %32, ptr %8, align 4, !tbaa !11
  %33 = load i32, ptr %6, align 4, !tbaa !9
  %34 = add i32 %33, -1
  store i32 %34, ptr %6, align 4, !tbaa !9
  br label %11, !llvm.loop !13

35:                                               ; preds = %11
  %36 = load float, ptr %7, align 4, !tbaa !11
  %37 = load float, ptr %8, align 4, !tbaa !11
  %38 = fdiv float %36, %37
  call void @llvm.lifetime.end.p0(i64 4, ptr %10) #3
  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 float %38
}

; 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.fabs.f32(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(read, inaccessiblemem: none) uwtable
define dso_local float @arm_braycurtis_distance_f32(ptr nocapture noundef readonly %0, ptr nocapture noundef readonly %1, i32 noundef %2) local_unnamed_addr #0 {
  %.not15 = icmp eq i32 %2, 0
  br i1 %.not15, 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 float, ptr %0, align 4, !tbaa !5
  %6 = getelementptr inbounds i8, ptr %1, i64 4
  %7 = load float, ptr %1, align 4, !tbaa !5
  %8 = fsub float %5, %7
  %9 = fadd float %5, %7
  %10 = insertelement <2 x float> poison, float %9, i64 0
  %11 = insertelement <2 x float> %10, float %8, i64 1
  %12 = tail call <2 x float> @llvm.fabs.v2f32(<2 x float> %11)
  %13 = add nsw i32 %2, -1
  br label %.lr.ph.prol.loopexit

.lr.ph.prol.loopexit:                             ; preds = %.lr.ph.prol, %.lr.ph.preheader
  %.lcssa.unr = phi <2 x float> [ poison, %.lr.ph.preheader ], [ %12, %.lr.ph.prol ]
  %.020.unr = phi ptr [ %0, %.lr.ph.preheader ], [ %4, %.lr.ph.prol ]
  %.01119.unr = phi ptr [ %1, %.lr.ph.preheader ], [ %6, %.lr.ph.prol ]
  %.01416.unr = phi i32 [ %2, %.lr.ph.preheader ], [ %13, %.lr.ph.prol ]
  %.unr = phi <2 x float> [ zeroinitializer, %.lr.ph.preheader ], [ %12, %.lr.ph.prol ]
  %14 = icmp eq i32 %2, 1
  br i1 %14, label %._crit_edge.loopexit, label %.lr.ph

.lr.ph:                                           ; preds = %.lr.ph.prol.loopexit, %.lr.ph
  %.020 = phi ptr [ %26, %.lr.ph ], [ %.020.unr, %.lr.ph.prol.loopexit ]
  %.01119 = phi ptr [ %28, %.lr.ph ], [ %.01119.unr, %.lr.ph.prol.loopexit ]
  %.01416 = phi i32 [ %36, %.lr.ph ], [ %.01416.unr, %.lr.ph.prol.loopexit ]
  %15 = phi <2 x float> [ %35, %.lr.ph ], [ %.unr, %.lr.ph.prol.loopexit ]
  %16 = getelementptr inbounds i8, ptr %.020, i64 4
  %17 = load float, ptr %.020, align 4, !tbaa !5
  %18 = getelementptr inbounds i8, ptr %.01119, i64 4
  %19 = load float, ptr %.01119, align 4, !tbaa !5
  %20 = fsub float %17, %19
  %21 = fadd float %17, %19
  %22 = insertelement <2 x float> poison, float %21, i64 0
  %23 = insertelement <2 x float> %22, float %20, i64 1
  %24 = tail call <2 x float> @llvm.fabs.v2f32(<2 x float> %23)
  %25 = fadd <2 x float> %15, %24
  %26 = getelementptr inbounds i8, ptr %.020, i64 8
  %27 = load float, ptr %16, align 4, !tbaa !5
  %28 = getelementptr inbounds i8, ptr %.01119, i64 8
  %29 = load float, ptr %18, align 4, !tbaa !5
  %30 = fsub float %27, %29
  %31 = fadd float %27, %29
  %32 = insertelement <2 x float> poison, float %31, i64 0
  %33 = insertelement <2 x float> %32, float %30, i64 1
  %34 = tail call <2 x float> @llvm.fabs.v2f32(<2 x float> %33)
  %35 = fadd <2 x float> %25, %34
  %36 = add i32 %.01416, -2
  %.not.1 = icmp eq i32 %36, 0
  br i1 %.not.1, label %._crit_edge.loopexit, label %.lr.ph, !llvm.loop !9

._crit_edge.loopexit:                             ; preds = %.lr.ph, %.lr.ph.prol.loopexit
  %.lcssa = phi <2 x float> [ %.lcssa.unr, %.lr.ph.prol.loopexit ], [ %35, %.lr.ph ]
  %37 = extractelement <2 x float> %.lcssa, i64 0
  %38 = extractelement <2 x float> %.lcssa, i64 1
  %39 = fdiv float %38, %37
  br label %._crit_edge

._crit_edge:                                      ; preds = %._crit_edge.loopexit, %3
  %40 = phi float [ 0x7FF8000000000000, %3 ], [ %39, %._crit_edge.loopexit ]
  ret float %40
}

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare <2 x float> @llvm.fabs.v2f32(<2 x float>) #1

attributes #0 = { nofree norecurse nosync nounwind memory(read, 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 = { 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 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: GVNPass,GlobalDCEPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SLPVectorizerPass,SROAPass,SimplifyCFGPass,TailCallElimPass