; LLVM IR from ubaldot/defrecs :: stm32f4x/ADC_Readings/platform (interrupts_to_tasks)

; 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 @BuiltinButtonDeferred(ptr noundef %0) #0 {
  %2 = alloca ptr, align 8
  %3 = alloca i32, align 4
  store ptr %0, ptr %2, align 8, !tbaa !5
  %4 = load ptr, ptr %2, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #3
  br label %5

5:                                                ; preds = %18, %1
  %6 = call i32 @ulTaskNotifyTake(i64 noundef 1, i32 noundef 10)
  store i32 %6, ptr %3, align 4, !tbaa !9
  %7 = load i32, ptr %3, align 4, !tbaa !9
  %8 = icmp ne i32 %7, 0
  br i1 %8, label %9, label %17

9:                                                ; preds = %5
  br label %10

10:                                               ; preds = %13, %9
  %11 = load i32, ptr %3, align 4, !tbaa !9
  %12 = icmp ugt i32 %11, 0
  br i1 %12, label %13, label %16

13:                                               ; preds = %10
  call void @usart2_step(i32 noundef 1)
  %14 = load i32, ptr %3, align 4, !tbaa !9
  %15 = add i32 %14, -1
  store i32 %15, ptr %3, align 4, !tbaa !9
  br label %10, !llvm.loop !11

16:                                               ; preds = %10
  br label %18

17:                                               ; preds = %5
  br label %18

18:                                               ; preds = %17, %16
  br label %5
}

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

declare i32 @ulTaskNotifyTake(i64 noundef, i32 noundef) #2

declare void @usart2_step(i32 noundef) #2

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 = 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: noreturn nounwind uwtable
define dso_local void @BuiltinButtonDeferred(ptr nocapture noundef readnone %0) local_unnamed_addr #0 {
  br label %.loopexit

.loopexit:                                        ; preds = %.loopexit.backedge, %1
  %2 = tail call i32 @ulTaskNotifyTake(i64 noundef 1, i32 noundef 10) #2
  %.not = icmp eq i32 %2, 0
  br i1 %.not, label %.loopexit.backedge, label %.preheader

.loopexit.backedge:                               ; preds = %.preheader, %.loopexit
  br label %.loopexit

.preheader:                                       ; preds = %.loopexit, %.preheader
  %.0 = phi i32 [ %3, %.preheader ], [ %2, %.loopexit ]
  tail call void @usart2_step(i32 noundef 1) #2
  %3 = add i32 %.0, -1
  %.old1.not = icmp eq i32 %3, 0
  br i1 %.old1.not, label %.loopexit.backedge, label %.preheader
}

declare i32 @ulTaskNotifyTake(i64 noundef, i32 noundef) local_unnamed_addr #1

declare void @usart2_step(i32 noundef) local_unnamed_addr #1

attributes #0 = { noreturn 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)"}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass