; LLVM IR from FedericaPaoli1/stm32-speech-recognition-and-traduction :: Drivers/CMSIS/DSP/Source/DistanceFunctions (arm_canberra_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_canberra_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
  %11 = 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
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #3
  call void @llvm.lifetime.start.p0(i64 4, ptr %10) #3
  call void @llvm.lifetime.start.p0(i64 4, ptr %11) #3
  br label %12

12:                                               ; preds = %42, %3
  %13 = load i32, ptr %6, align 4, !tbaa !9
  %14 = icmp ugt i32 %13, 0
  br i1 %14, label %15, label %45

15:                                               ; preds = %12
  %16 = load ptr, ptr %4, align 8, !tbaa !5
  %17 = getelementptr inbounds float, ptr %16, i32 1
  store ptr %17, ptr %4, align 8, !tbaa !5
  %18 = load float, ptr %16, align 4, !tbaa !11
  store float %18, ptr %8, 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
  store float %21, ptr %9, align 4, !tbaa !11
  %22 = load float, ptr %8, align 4, !tbaa !11
  %23 = load float, ptr %9, align 4, !tbaa !11
  %24 = fsub float %22, %23
  %25 = call float @llvm.fabs.f32(float %24)
  store float %25, ptr %10, align 4, !tbaa !11
  %26 = load float, ptr %8, align 4, !tbaa !11
  %27 = call float @llvm.fabs.f32(float %26)
  %28 = load float, ptr %9, align 4, !tbaa !11
  %29 = call float @llvm.fabs.f32(float %28)
  %30 = fadd float %27, %29
  store float %30, ptr %11, align 4, !tbaa !11
  %31 = load float, ptr %8, align 4, !tbaa !11
  %32 = fcmp une float %31, 0.000000e+00
  br i1 %32, label %36, label %33

33:                                               ; preds = %15
  %34 = load float, ptr %9, align 4, !tbaa !11
  %35 = fcmp une float %34, 0.000000e+00
  br i1 %35, label %36, label %42

36:                                               ; preds = %33, %15
  %37 = load float, ptr %10, align 4, !tbaa !11
  %38 = load float, ptr %11, align 4, !tbaa !11
  %39 = fdiv float %37, %38
  %40 = load float, ptr %7, align 4, !tbaa !11
  %41 = fadd float %40, %39
  store float %41, ptr %7, align 4, !tbaa !11
  br label %42

42:                                               ; preds = %36, %33
  %43 = load i32, ptr %6, align 4, !tbaa !9
  %44 = add i32 %43, -1
  store i32 %44, ptr %6, align 4, !tbaa !9
  br label %12, !llvm.loop !13

45:                                               ; preds = %12
  %46 = load float, ptr %7, align 4, !tbaa !11
  call void @llvm.lifetime.end.p0(i64 4, ptr %11) #3
  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 %46
}

; 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_canberra_distance_f32(ptr nocapture noundef readonly %0, ptr nocapture noundef readonly %1, i32 noundef %2) local_unnamed_addr #0 {
  %.not17 = icmp eq i32 %2, 0
  br i1 %.not17, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %3, %18
  %.021 = phi ptr [ %4, %18 ], [ %0, %3 ]
  %.01420 = phi ptr [ %6, %18 ], [ %1, %3 ]
  %.01519 = phi i32 [ %19, %18 ], [ %2, %3 ]
  %.01618 = phi float [ %.1, %18 ], [ 0.000000e+00, %3 ]
  %4 = getelementptr inbounds i8, ptr %.021, i64 4
  %5 = load float, ptr %.021, align 4, !tbaa !5
  %6 = getelementptr inbounds i8, ptr %.01420, i64 4
  %7 = load float, ptr %.01420, align 4, !tbaa !5
  %8 = fcmp une float %5, 0.000000e+00
  %9 = fcmp une float %7, 0.000000e+00
  %or.cond = select i1 %8, i1 true, i1 %9
  br i1 %or.cond, label %10, label %18

10:                                               ; preds = %.lr.ph
  %11 = tail call float @llvm.fabs.f32(float %5)
  %12 = tail call float @llvm.fabs.f32(float %7)
  %13 = fadd float %11, %12
  %14 = fsub float %5, %7
  %15 = tail call float @llvm.fabs.f32(float %14)
  %16 = fdiv float %15, %13
  %17 = fadd float %.01618, %16
  br label %18

18:                                               ; preds = %.lr.ph, %10
  %.1 = phi float [ %17, %10 ], [ %.01618, %.lr.ph ]
  %19 = add i32 %.01519, -1
  %.not = icmp eq i32 %19, 0
  br i1 %.not, label %._crit_edge, label %.lr.ph, !llvm.loop !9

._crit_edge:                                      ; preds = %18, %3
  %.016.lcssa = phi float [ 0.000000e+00, %3 ], [ %.1, %18 ]
  ret float %.016.lcssa
}

; Function Attrs: mustprogress nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare float @llvm.fabs.f32(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 = { mustprogress 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,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass