; LLVM IR from tensorflow/tflite-micro :: signal/src (circular_buffer)

; 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"

%"struct.tflite::tflm_signal::CircularBuffer" = type { i64, i64, i64, i32, i32, ptr }

@.str.1 = external hidden unnamed_addr constant [87 x i8], align 1
@.str.8 = external hidden unnamed_addr constant [36 x i8], align 1
@__PRETTY_FUNCTION__._ZN6tflite11tflm_signal18CircularBufferPeekEPKNS0_14CircularBufferEm = external hidden unnamed_addr constant [93 x i8], align 1

; Function Attrs: noreturn nounwind
declare void @__assert_fail(ptr noundef, ptr noundef, i32 noundef, ptr noundef) #0

; 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 willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i64 @_ZN6tflite11tflm_signal23CircularBufferAvailableEPKNS0_14CircularBufferE(ptr noundef) #2

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef signext i16 @_ZN6tflite11tflm_signal18CircularBufferPeekEPKNS0_14CircularBufferEm(ptr noundef %0, i64 noundef %1) #2 {
  %3 = alloca ptr, align 8
  %4 = alloca i64, align 8
  %5 = alloca i64, align 8
  store ptr %0, ptr %3, align 8, !tbaa !5
  store i64 %1, ptr %4, align 8, !tbaa !9
  %6 = load ptr, ptr %3, align 8, !tbaa !5
  %7 = call noundef i64 @_ZN6tflite11tflm_signal23CircularBufferAvailableEPKNS0_14CircularBufferE(ptr noundef %6)
  %8 = load i64, ptr %4, align 8, !tbaa !9
  %9 = icmp ugt i64 %7, %8
  br i1 %9, label %10, label %11

10:                                               ; preds = %2
  br label %13

11:                                               ; preds = %2
  call void @__assert_fail(ptr noundef @.str.8, ptr noundef @.str.1, i32 noundef 200, ptr noundef @__PRETTY_FUNCTION__._ZN6tflite11tflm_signal18CircularBufferPeekEPKNS0_14CircularBufferEm) #3
  unreachable

12:                                               ; No predecessors!
  br label %13

13:                                               ; preds = %12, %10
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #4
  %14 = load ptr, ptr %3, align 8, !tbaa !5
  %15 = getelementptr inbounds %"struct.tflite::tflm_signal::CircularBuffer", ptr %14, i32 0, i32 1
  %16 = load i64, ptr %15, align 8, !tbaa !11
  %17 = load i64, ptr %4, align 8, !tbaa !9
  %18 = add i64 %16, %17
  store i64 %18, ptr %5, align 8, !tbaa !9
  br label %19

19:                                               ; preds = %25, %13
  %20 = load i64, ptr %5, align 8, !tbaa !9
  %21 = load ptr, ptr %3, align 8, !tbaa !5
  %22 = getelementptr inbounds %"struct.tflite::tflm_signal::CircularBuffer", ptr %21, i32 0, i32 0
  %23 = load i64, ptr %22, align 8, !tbaa !14
  %24 = icmp uge i64 %20, %23
  br i1 %24, label %25, label %31

25:                                               ; preds = %19
  %26 = load ptr, ptr %3, align 8, !tbaa !5
  %27 = getelementptr inbounds %"struct.tflite::tflm_signal::CircularBuffer", ptr %26, i32 0, i32 0
  %28 = load i64, ptr %27, align 8, !tbaa !14
  %29 = load i64, ptr %5, align 8, !tbaa !9
  %30 = sub i64 %29, %28
  store i64 %30, ptr %5, align 8, !tbaa !9
  br label %19, !llvm.loop !15

31:                                               ; preds = %19
  %32 = load ptr, ptr %3, align 8, !tbaa !5
  %33 = getelementptr inbounds %"struct.tflite::tflm_signal::CircularBuffer", ptr %32, i32 0, i32 5
  %34 = load ptr, ptr %33, align 8, !tbaa !17
  %35 = load i64, ptr %5, align 8, !tbaa !9
  %36 = getelementptr inbounds i16, ptr %34, i64 %35
  %37 = load i16, ptr %36, align 2, !tbaa !18
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #4
  ret i16 %37
}

attributes #0 = { noreturn 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 #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { mustprogress 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 = { noreturn nounwind }
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++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"long", !7, i64 0}
!11 = !{!12, !10, i64 8}
!12 = !{!"_ZTSN6tflite11tflm_signal14CircularBufferE", !10, i64 0, !10, i64 8, !10, i64 16, !13, i64 24, !13, i64 28, !6, i64 32}
!13 = !{!"int", !7, i64 0}
!14 = !{!12, !10, i64 0}
!15 = distinct !{!15, !16}
!16 = !{!"llvm.loop.mustprogress"}
!17 = !{!12, !6, i64 32}
!18 = !{!19, !19, i64 0}
!19 = !{!"short", !7, i64 0}


; 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"

@.str.1 = external hidden unnamed_addr constant [87 x i8], align 1
@.str.8 = external hidden unnamed_addr constant [36 x i8], align 1
@__PRETTY_FUNCTION__._ZN6tflite11tflm_signal18CircularBufferPeekEPKNS0_14CircularBufferEm = external hidden unnamed_addr constant [93 x i8], align 1

; Function Attrs: noreturn nounwind
declare void @__assert_fail(ptr noundef, ptr noundef, i32 noundef, ptr noundef) local_unnamed_addr #0

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i64 @_ZN6tflite11tflm_signal23CircularBufferAvailableEPKNS0_14CircularBufferE(ptr noundef) local_unnamed_addr #1

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef signext i16 @_ZN6tflite11tflm_signal18CircularBufferPeekEPKNS0_14CircularBufferEm(ptr noundef %0, i64 noundef %1) local_unnamed_addr #1 {
  %3 = tail call noundef i64 @_ZN6tflite11tflm_signal23CircularBufferAvailableEPKNS0_14CircularBufferE(ptr noundef %0)
  %4 = icmp ugt i64 %3, %1
  br i1 %4, label %6, label %5

5:                                                ; preds = %2
  tail call void @__assert_fail(ptr noundef nonnull @.str.8, ptr noundef nonnull @.str.1, i32 noundef 200, ptr noundef nonnull @__PRETTY_FUNCTION__._ZN6tflite11tflm_signal18CircularBufferPeekEPKNS0_14CircularBufferEm) #2
  unreachable

6:                                                ; preds = %2
  %7 = getelementptr inbounds i8, ptr %0, i64 8
  %8 = load i64, ptr %7, align 8, !tbaa !5
  %9 = add i64 %8, %1
  %10 = load i64, ptr %0, align 8, !tbaa !12
  br label %11

11:                                               ; preds = %11, %6
  %.0 = phi i64 [ %9, %6 ], [ %12, %11 ]
  %.not = icmp ult i64 %.0, %10
  %12 = sub i64 %.0, %10
  br i1 %.not, label %13, label %11, !llvm.loop !13

13:                                               ; preds = %11
  %14 = getelementptr inbounds i8, ptr %0, i64 32
  %15 = load ptr, ptr %14, align 8, !tbaa !15
  %16 = getelementptr inbounds i16, ptr %15, i64 %.0
  %17 = load i16, ptr %16, align 2, !tbaa !16
  ret i16 %17
}

attributes #0 = { noreturn 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 #1 = { mustprogress 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 #2 = { noreturn 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, !7, i64 8}
!6 = !{!"_ZTSN6tflite11tflm_signal14CircularBufferE", !7, i64 0, !7, i64 8, !7, i64 16, !10, i64 24, !10, i64 28, !11, i64 32}
!7 = !{!"long", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}
!10 = !{!"int", !8, i64 0}
!11 = !{!"any pointer", !8, i64 0}
!12 = !{!6, !7, i64 0}
!13 = distinct !{!13, !14}
!14 = !{!"llvm.loop.mustprogress"}
!15 = !{!6, !11, i64 32}
!16 = !{!17, !17, i64 0}
!17 = !{!"short", !8, i64 0}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,LCSSAPass,LICMPass,LoopRotatePass,LoopUnrollPass,SROAPass,SimplifyCFGPass,TailCallElimPass