; LLVM IR from FedericaPaoli1/stm32-speech-recognition-and-traduction :: Drivers/CMSIS/DSP/Source/StatisticsFunctions (arm_kullback_leibler_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_kullback_leibler_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 ptr, align 8
  %8 = alloca ptr, align 8
  %9 = alloca i32, align 4
  %10 = alloca float, align 4
  %11 = alloca float, align 4
  %12 = 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 8, ptr %7) #4
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #4
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #4
  call void @llvm.lifetime.start.p0(i64 4, ptr %10) #4
  call void @llvm.lifetime.start.p0(i64 4, ptr %11) #4
  call void @llvm.lifetime.start.p0(i64 4, ptr %12) #4
  %13 = load ptr, ptr %4, align 8, !tbaa !5
  store ptr %13, ptr %7, align 8, !tbaa !5
  %14 = load ptr, ptr %5, align 8, !tbaa !5
  store ptr %14, ptr %8, align 8, !tbaa !5
  %15 = load i32, ptr %6, align 4, !tbaa !9
  store i32 %15, ptr %9, align 4, !tbaa !9
  store float 0.000000e+00, ptr %10, align 4, !tbaa !11
  br label %16

16:                                               ; preds = %19, %3
  %17 = load i32, ptr %9, align 4, !tbaa !9
  %18 = icmp ugt i32 %17, 0
  br i1 %18, label %19, label %35

19:                                               ; preds = %16
  %20 = load ptr, ptr %7, align 8, !tbaa !5
  %21 = getelementptr inbounds float, ptr %20, i32 1
  store ptr %21, ptr %7, align 8, !tbaa !5
  %22 = load float, ptr %20, align 4, !tbaa !11
  store float %22, ptr %11, align 4, !tbaa !11
  %23 = load ptr, ptr %8, align 8, !tbaa !5
  %24 = getelementptr inbounds float, ptr %23, i32 1
  store ptr %24, ptr %8, align 8, !tbaa !5
  %25 = load float, ptr %23, align 4, !tbaa !11
  store float %25, ptr %12, align 4, !tbaa !11
  %26 = load float, ptr %11, align 4, !tbaa !11
  %27 = load float, ptr %12, align 4, !tbaa !11
  %28 = load float, ptr %11, align 4, !tbaa !11
  %29 = fdiv float %27, %28
  %30 = call float @logf(float noundef %29) #4
  %31 = load float, ptr %10, align 4, !tbaa !11
  %32 = call float @llvm.fmuladd.f32(float %26, float %30, float %31)
  store float %32, ptr %10, 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 %16, !llvm.loop !13

35:                                               ; preds = %16
  %36 = load float, ptr %10, align 4, !tbaa !11
  %37 = fneg float %36
  call void @llvm.lifetime.end.p0(i64 4, ptr %12) #4
  call void @llvm.lifetime.end.p0(i64 4, ptr %11) #4
  call void @llvm.lifetime.end.p0(i64 4, ptr %10) #4
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #4
  ret float %37
}

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nounwind
declare float @logf(float noundef) #2

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare float @llvm.fmuladd.f32(float, float, float) #3

; 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 "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 #3 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }
attributes #4 = { 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 nounwind memory(readwrite, inaccessiblemem: write) uwtable
define dso_local float @arm_kullback_leibler_f32(ptr nocapture noundef readonly %0, ptr nocapture noundef readonly %1, i32 noundef %2) local_unnamed_addr #0 {
  %.not14 = icmp eq i32 %2, 0
  br i1 %.not14, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %3, %.lr.ph
  %.018 = phi ptr [ %4, %.lr.ph ], [ %0, %3 ]
  %.01117 = phi ptr [ %6, %.lr.ph ], [ %1, %3 ]
  %.01216 = phi float [ %10, %.lr.ph ], [ 0.000000e+00, %3 ]
  %.01315 = phi i32 [ %11, %.lr.ph ], [ %2, %3 ]
  %4 = getelementptr inbounds i8, ptr %.018, i64 4
  %5 = load float, ptr %.018, align 4, !tbaa !5
  %6 = getelementptr inbounds i8, ptr %.01117, i64 4
  %7 = load float, ptr %.01117, align 4, !tbaa !5
  %8 = fdiv float %7, %5
  %9 = tail call float @logf(float noundef %8) #3
  %10 = tail call float @llvm.fmuladd.f32(float %5, float %9, float %.01216)
  %11 = add i32 %.01315, -1
  %.not = icmp eq i32 %11, 0
  br i1 %.not, label %._crit_edge, label %.lr.ph, !llvm.loop !9

._crit_edge:                                      ; preds = %.lr.ph, %3
  %.012.lcssa = phi float [ 0.000000e+00, %3 ], [ %10, %.lr.ph ]
  %12 = fneg float %.012.lcssa
  ret float %12
}

; Function Attrs: mustprogress nofree nounwind willreturn memory(write)
declare float @logf(float noundef) local_unnamed_addr #1

; Function Attrs: mustprogress nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare float @llvm.fmuladd.f32(float, float, float) #2

attributes #0 = { nofree nounwind memory(readwrite, inaccessiblemem: write) 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 nofree nounwind willreturn memory(write) "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 #2 = { mustprogress 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 = !{!"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