; LLVM IR from FedericaPaoli1/stm32-speech-recognition-and-traduction :: Drivers/CMSIS/DSP/Source/ComplexMathFunctions (arm_cmplx_mult_real_q31)

; 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_q31(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 i32, 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) #3
  call void @llvm.lifetime.start.p0(i64 4, ptr %10) #3
  %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 %43

15:                                               ; preds = %12
  %16 = load ptr, ptr %6, align 8, !tbaa !5
  %17 = getelementptr inbounds i32, ptr %16, i32 1
  store ptr %17, ptr %6, align 8, !tbaa !5
  %18 = load i32, ptr %16, align 4, !tbaa !9
  store i32 %18, ptr %10, align 4, !tbaa !9
  %19 = load ptr, ptr %5, align 8, !tbaa !5
  %20 = getelementptr inbounds i32, ptr %19, i32 1
  store ptr %20, ptr %5, align 8, !tbaa !5
  %21 = load i32, ptr %19, align 4, !tbaa !9
  %22 = sext i32 %21 to i64
  %23 = load i32, ptr %10, align 4, !tbaa !9
  %24 = sext i32 %23 to i64
  %25 = mul nsw i64 %22, %24
  %26 = ashr i64 %25, 31
  %27 = call i32 @clip_q63_to_q31(i64 noundef %26)
  %28 = load ptr, ptr %7, align 8, !tbaa !5
  %29 = getelementptr inbounds i32, ptr %28, i32 1
  store ptr %29, ptr %7, align 8, !tbaa !5
  store i32 %27, ptr %28, align 4, !tbaa !9
  %30 = load ptr, ptr %5, align 8, !tbaa !5
  %31 = getelementptr inbounds i32, ptr %30, i32 1
  store ptr %31, ptr %5, align 8, !tbaa !5
  %32 = load i32, ptr %30, align 4, !tbaa !9
  %33 = sext i32 %32 to i64
  %34 = load i32, ptr %10, align 4, !tbaa !9
  %35 = sext i32 %34 to i64
  %36 = mul nsw i64 %33, %35
  %37 = ashr i64 %36, 31
  %38 = call i32 @clip_q63_to_q31(i64 noundef %37)
  %39 = load ptr, ptr %7, align 8, !tbaa !5
  %40 = getelementptr inbounds i32, ptr %39, i32 1
  store ptr %40, ptr %7, align 8, !tbaa !5
  store i32 %38, ptr %39, align 4, !tbaa !9
  %41 = load i32, ptr %9, align 4, !tbaa !9
  %42 = add i32 %41, -1
  store i32 %42, ptr %9, align 4, !tbaa !9
  br label %12, !llvm.loop !11

43:                                               ; preds = %12
  call void @llvm.lifetime.end.p0(i64 4, ptr %10) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #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: alwaysinline nounwind uwtable
declare hidden i32 @clip_q63_to_q31(i64 noundef) #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 = { alwaysinline 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 #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 = distinct !{!11, !12}
!12 = !{!"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: nounwind uwtable
define dso_local void @arm_cmplx_mult_real_q31(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

.lr.ph:                                           ; preds = %4, %.lr.ph
  %.016 = phi ptr [ %15, %.lr.ph ], [ %0, %4 ]
  %.0915 = phi i32 [ %22, %.lr.ph ], [ %3, %4 ]
  %.01014 = phi ptr [ %5, %.lr.ph ], [ %1, %4 ]
  %.01113 = phi ptr [ %21, %.lr.ph ], [ %2, %4 ]
  %5 = getelementptr inbounds i8, ptr %.01014, i64 4
  %6 = load i32, ptr %.01014, align 4, !tbaa !5
  %7 = getelementptr inbounds i8, ptr %.016, i64 4
  %8 = load i32, ptr %.016, align 4, !tbaa !5
  %9 = sext i32 %8 to i64
  %10 = sext i32 %6 to i64
  %11 = mul nsw i64 %9, %10
  %12 = ashr i64 %11, 31
  %13 = tail call i32 @clip_q63_to_q31(i64 noundef %12)
  %14 = getelementptr inbounds i8, ptr %.01113, i64 4
  store i32 %13, ptr %.01113, align 4, !tbaa !5
  %15 = getelementptr inbounds i8, ptr %.016, i64 8
  %16 = load i32, ptr %7, align 4, !tbaa !5
  %17 = sext i32 %16 to i64
  %18 = mul nsw i64 %17, %10
  %19 = ashr i64 %18, 31
  %20 = tail call i32 @clip_q63_to_q31(i64 noundef %19)
  %21 = getelementptr inbounds i8, ptr %.01113, i64 8
  store i32 %20, ptr %14, align 4, !tbaa !5
  %22 = add i32 %.0915, -1
  %.not = icmp eq i32 %22, 0
  br i1 %.not, label %._crit_edge, label %.lr.ph, !llvm.loop !9

._crit_edge:                                      ; preds = %.lr.ph, %4
  ret void
}

; Function Attrs: alwaysinline nounwind uwtable
declare hidden i32 @clip_q63_to_q31(i64 noundef) local_unnamed_addr #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 = { alwaysinline 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" }

!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 = !{!"int", !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: EarlyCSEPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass