; LLVM IR from tanakamasayuki/Arduino_TensorFlowLite_ESP32 :: src/tensorflow/lite/micro/micro_error_reporter.ll (ZN6tflite21GetMicroErrorReporterEv)

; 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"

@_ZN12_GLOBAL__N_115error_reporter_E = external hidden global ptr, align 8
@_ZN12_GLOBAL__N_127micro_error_reporter_bufferE = external hidden global [8 x i8], align 1

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef ptr @_ZN6tflite21GetMicroErrorReporterEv() #0 {
  %1 = load ptr, ptr @_ZN12_GLOBAL__N_115error_reporter_E, align 8, !tbaa !5
  %2 = icmp eq ptr %1, null
  br i1 %2, label %3, label %4

3:                                                ; preds = %0
  call void @llvm.memset.p0.i64(ptr align 1 @_ZN12_GLOBAL__N_127micro_error_reporter_bufferE, i8 0, i64 8, i1 false)
  call void @_ZN6tflite18MicroErrorReporterC2Ev(ptr noundef nonnull align 8 dereferenceable(8) @_ZN12_GLOBAL__N_127micro_error_reporter_bufferE) #3
  store ptr @_ZN12_GLOBAL__N_127micro_error_reporter_bufferE, ptr @_ZN12_GLOBAL__N_115error_reporter_E, align 8, !tbaa !5
  br label %4

4:                                                ; preds = %3, %0
  %5 = load ptr, ptr @_ZN12_GLOBAL__N_115error_reporter_E, align 8, !tbaa !5
  ret ptr %5
}

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #1

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local void @_ZN6tflite18MicroErrorReporterC2Ev(ptr noundef nonnull align 8 dereferenceable(8)) unnamed_addr #2 align 2

attributes #0 = { 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 #1 = { nocallback nofree nounwind willreturn memory(argmem: write) }
attributes #2 = { inlinehint 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 = { 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"}


; 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"

@_ZN12_GLOBAL__N_115error_reporter_E = external hidden local_unnamed_addr global ptr, align 8
@_ZN12_GLOBAL__N_127micro_error_reporter_bufferE = external hidden global [8 x i8], align 1

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef nonnull ptr @_ZN6tflite21GetMicroErrorReporterEv() local_unnamed_addr #0 {
  %1 = load ptr, ptr @_ZN12_GLOBAL__N_115error_reporter_E, align 8, !tbaa !5
  %2 = icmp eq ptr %1, null
  br i1 %2, label %3, label %4

3:                                                ; preds = %0
  store i64 0, ptr @_ZN12_GLOBAL__N_127micro_error_reporter_bufferE, align 1
  tail call void @_ZN6tflite18MicroErrorReporterC2Ev(ptr noundef nonnull align 8 dereferenceable(8) @_ZN12_GLOBAL__N_127micro_error_reporter_bufferE) #2
  store ptr @_ZN12_GLOBAL__N_127micro_error_reporter_bufferE, ptr @_ZN12_GLOBAL__N_115error_reporter_E, align 8, !tbaa !5
  br label %4

4:                                                ; preds = %3, %0
  %5 = phi ptr [ @_ZN12_GLOBAL__N_127micro_error_reporter_bufferE, %3 ], [ %1, %0 ]
  ret ptr %5
}

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local void @_ZN6tflite18MicroErrorReporterC2Ev(ptr noundef nonnull align 8 dereferenceable(8)) unnamed_addr #1 align 2

attributes #0 = { 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 #1 = { inlinehint 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 = { 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"}


; Effective O3 passes: GVNPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,PostOrderFunctionAttrsPass,TailCallElimPass