; LLVM IR from FedericaPaoli1/stm32-speech-recognition-and-traduction :: Drivers/CMSIS/DSP/Source/ComplexMathFunctions (arm_cmplx_mag_q15)

; 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_mag_q15(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 i32, align 4
  %8 = alloca i16, align 2
  %9 = alloca i16, align 2
  %10 = alloca i32, align 4
  %11 = alloca i32, 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
  call void @llvm.lifetime.start.p0(i64 2, ptr %8) #3
  call void @llvm.lifetime.start.p0(i64 2, 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
  %12 = load i32, ptr %6, align 4, !tbaa !9
  store i32 %12, ptr %7, align 4, !tbaa !9
  br label %13

13:                                               ; preds = %16, %3
  %14 = load i32, ptr %7, align 4, !tbaa !9
  %15 = icmp ugt i32 %14, 0
  br i1 %15, label %16, label %45

16:                                               ; preds = %13
  %17 = load ptr, ptr %4, align 8, !tbaa !5
  %18 = getelementptr inbounds i16, ptr %17, i32 1
  store ptr %18, ptr %4, align 8, !tbaa !5
  %19 = load i16, ptr %17, align 2, !tbaa !11
  store i16 %19, ptr %8, align 2, !tbaa !11
  %20 = load ptr, ptr %4, align 8, !tbaa !5
  %21 = getelementptr inbounds i16, ptr %20, i32 1
  store ptr %21, ptr %4, align 8, !tbaa !5
  %22 = load i16, ptr %20, align 2, !tbaa !11
  store i16 %22, ptr %9, align 2, !tbaa !11
  %23 = load i16, ptr %8, align 2, !tbaa !11
  %24 = sext i16 %23 to i32
  %25 = load i16, ptr %8, align 2, !tbaa !11
  %26 = sext i16 %25 to i32
  %27 = mul nsw i32 %24, %26
  store i32 %27, ptr %10, align 4, !tbaa !9
  %28 = load i16, ptr %9, align 2, !tbaa !11
  %29 = sext i16 %28 to i32
  %30 = load i16, ptr %9, align 2, !tbaa !11
  %31 = sext i16 %30 to i32
  %32 = mul nsw i32 %29, %31
  store i32 %32, ptr %11, align 4, !tbaa !9
  %33 = load i32, ptr %10, align 4, !tbaa !9
  %34 = sext i32 %33 to i64
  %35 = load i32, ptr %11, align 4, !tbaa !9
  %36 = sext i32 %35 to i64
  %37 = add nsw i64 %34, %36
  %38 = ashr i64 %37, 17
  %39 = trunc i64 %38 to i16
  %40 = load ptr, ptr %5, align 8, !tbaa !5
  %41 = getelementptr inbounds i16, ptr %40, i32 1
  store ptr %41, ptr %5, align 8, !tbaa !5
  %42 = call i32 @arm_sqrt_q15(i16 noundef signext %39, ptr noundef %40)
  %43 = load i32, ptr %7, align 4, !tbaa !9
  %44 = add i32 %43, -1
  store i32 %44, ptr %7, align 4, !tbaa !9
  br label %13, !llvm.loop !13

45:                                               ; preds = %13
  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 2, ptr %9) #3
  call void @llvm.lifetime.end.p0(i64 2, ptr %8) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #3
  ret void
}

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

declare i32 @arm_sqrt_q15(i16 noundef signext, ptr 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 = { "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 = !{!12, !12, i64 0}
!12 = !{!"short", !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: nounwind uwtable
define dso_local void @arm_cmplx_mag_q15(ptr nocapture noundef readonly %0, ptr noundef %1, i32 noundef %2) local_unnamed_addr #0 {
  %.not13 = icmp eq i32 %2, 0
  br i1 %.not13, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %3, %.lr.ph
  %.016 = phi ptr [ %6, %.lr.ph ], [ %0, %3 ]
  %.01115 = phi ptr [ %14, %.lr.ph ], [ %1, %3 ]
  %.01214 = phi i32 [ %16, %.lr.ph ], [ %2, %3 ]
  %4 = getelementptr inbounds i8, ptr %.016, i64 2
  %5 = load i16, ptr %.016, align 2, !tbaa !5
  %6 = getelementptr inbounds i8, ptr %.016, i64 4
  %7 = load i16, ptr %4, align 2, !tbaa !5
  %8 = sext i16 %5 to i32
  %9 = mul nsw i32 %8, %8
  %10 = sext i16 %7 to i32
  %11 = mul nsw i32 %10, %10
  %narrow = add nuw i32 %11, %9
  %12 = lshr i32 %narrow, 17
  %13 = trunc nuw nsw i32 %12 to i16
  %14 = getelementptr inbounds i8, ptr %.01115, i64 2
  %15 = tail call i32 @arm_sqrt_q15(i16 noundef signext %13, ptr noundef %.01115) #2
  %16 = add i32 %.01214, -1
  %.not = icmp eq i32 %16, 0
  br i1 %.not, label %._crit_edge, label %.lr.ph, !llvm.loop !9

._crit_edge:                                      ; preds = %.lr.ph, %3
  ret void
}

declare i32 @arm_sqrt_q15(i16 noundef signext, ptr 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 = { "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 = { 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 = !{!"short", !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,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass