; LLVM IR from lichen-community-systems/signaletic :: hosts/daisy/vendor/libDaisy/Drivers/STM32H7xx_HAL_Driver/Src (UnRegisterCallback)

; 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.__RAMECC_HandleTypeDef = type { ptr, i32, ptr }

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nounwind uwtable
define dso_local i32 @HAL_RAMECC_UnRegisterCallback(ptr noundef %0) #1 {
  %2 = alloca i32, align 4
  %3 = alloca ptr, align 8
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  %6 = load ptr, ptr %3, align 8, !tbaa !5
  %7 = icmp eq ptr %6, null
  br i1 %7, label %8, label %9

8:                                                ; preds = %1
  store i32 1, ptr %2, align 4
  br label %26

9:                                                ; preds = %1
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #2
  %10 = load ptr, ptr %3, align 8, !tbaa !5
  %11 = getelementptr inbounds %struct.__RAMECC_HandleTypeDef, ptr %10, i32 0, i32 1
  %12 = load volatile i32, ptr %11, align 8, !tbaa !9
  store i32 %12, ptr %4, align 4, !tbaa !12
  %13 = load i32, ptr %4, align 4, !tbaa !12
  %14 = icmp eq i32 %13, 1
  br i1 %14, label %18, label %15

15:                                               ; preds = %9
  %16 = load i32, ptr %4, align 4, !tbaa !12
  %17 = icmp eq i32 %16, 2
  br i1 %17, label %18, label %21

18:                                               ; preds = %15, %9
  %19 = load ptr, ptr %3, align 8, !tbaa !5
  %20 = getelementptr inbounds %struct.__RAMECC_HandleTypeDef, ptr %19, i32 0, i32 2
  store ptr null, ptr %20, align 8, !tbaa !13
  br label %24

21:                                               ; preds = %15
  %22 = load ptr, ptr %3, align 8, !tbaa !5
  %23 = getelementptr inbounds %struct.__RAMECC_HandleTypeDef, ptr %22, i32 0, i32 1
  store volatile i32 3, ptr %23, align 8, !tbaa !9
  store i32 1, ptr %2, align 4
  store i32 1, ptr %5, align 4
  br label %25

24:                                               ; preds = %18
  store i32 0, ptr %2, align 4
  store i32 1, ptr %5, align 4
  br label %25

25:                                               ; preds = %24, %21
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #2
  br label %26

26:                                               ; preds = %25, %8
  %27 = load i32, ptr %2, align 4
  ret i32 %27
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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/C++ TBAA"}
!9 = !{!10, !11, i64 8}
!10 = !{!"__RAMECC_HandleTypeDef", !6, i64 0, !11, i64 8, !6, i64 16}
!11 = !{!"int", !7, i64 0}
!12 = !{!11, !11, i64 0}
!13 = !{!10, !6, i64 16}


; 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 norecurse nounwind memory(argmem: readwrite, inaccessiblemem: readwrite) uwtable
define dso_local range(i32 0, 2) i32 @HAL_RAMECC_UnRegisterCallback(ptr noundef %0) local_unnamed_addr #0 {
  %2 = icmp eq ptr %0, null
  br i1 %2, label %10, label %3

3:                                                ; preds = %1
  %4 = getelementptr inbounds i8, ptr %0, i64 8
  %5 = load volatile i32, ptr %4, align 8, !tbaa !5
  %6 = add i32 %5, -1
  %or.cond = icmp ult i32 %6, 2
  br i1 %or.cond, label %7, label %9

7:                                                ; preds = %3
  %8 = getelementptr inbounds i8, ptr %0, i64 16
  store ptr null, ptr %8, align 8, !tbaa !11
  br label %10

9:                                                ; preds = %3
  store volatile i32 3, ptr %4, align 8, !tbaa !5
  br label %10

10:                                               ; preds = %9, %7, %1
  %.1 = phi i32 [ 1, %1 ], [ 0, %7 ], [ 1, %9 ]
  ret i32 %.1
}

attributes #0 = { nofree norecurse nounwind memory(argmem: readwrite, inaccessiblemem: readwrite) 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, !10, i64 8}
!6 = !{!"__RAMECC_HandleTypeDef", !7, i64 0, !10, i64 8, !7, i64 16}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"int", !8, i64 0}
!11 = !{!6, !7, i64 16}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass