; LLVM IR from lichen-community-systems/signaletic :: hosts/daisy/vendor/libDaisy/Drivers/STM32H7xx_HAL_Driver/Src (stm32h7xx_hal)

; 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
declare dso_local i32 @HAL_GetTick() #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: nounwind uwtable
define dso_local i32 @HAL_SYSCFG_EnableVREFBUF() #0 {
  %1 = alloca i32, align 4
  %2 = alloca i32, align 4
  %3 = alloca i32, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr %2) #2
  %4 = load volatile i32, ptr inttoptr (i64 1476410368 to ptr), align 4, !tbaa !5
  %5 = zext i32 %4 to i64
  %6 = or i64 %5, 1
  %7 = trunc i64 %6 to i32
  store volatile i32 %7, ptr inttoptr (i64 1476410368 to ptr), align 4, !tbaa !5
  %8 = call i32 @HAL_GetTick()
  store i32 %8, ptr %2, align 4, !tbaa !10
  br label %9

9:                                                ; preds = %20, %0
  %10 = load volatile i32, ptr inttoptr (i64 1476410368 to ptr), align 4, !tbaa !5
  %11 = zext i32 %10 to i64
  %12 = and i64 %11, 8
  %13 = icmp eq i64 %12, 0
  br i1 %13, label %14, label %21

14:                                               ; preds = %9
  %15 = call i32 @HAL_GetTick()
  %16 = load i32, ptr %2, align 4, !tbaa !10
  %17 = sub i32 %15, %16
  %18 = icmp ugt i32 %17, 10
  br i1 %18, label %19, label %20

19:                                               ; preds = %14
  store i32 3, ptr %1, align 4
  store i32 1, ptr %3, align 4
  br label %22

20:                                               ; preds = %14
  br label %9, !llvm.loop !11

21:                                               ; preds = %9
  store i32 0, ptr %1, align 4
  store i32 1, ptr %3, align 4
  br label %22

22:                                               ; preds = %21, %19
  call void @llvm.lifetime.end.p0(i64 4, ptr %2) #2
  %23 = load i32, ptr %1, align 4
  ret i32 %23
}

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 = { 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 0}
!6 = !{!"", !7, i64 0, !7, i64 4}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!7, !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: nounwind uwtable
declare dso_local i32 @HAL_GetTick() local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local range(i32 0, 4) i32 @HAL_SYSCFG_EnableVREFBUF() local_unnamed_addr #0 {
  %1 = load volatile i32, ptr inttoptr (i64 1476410368 to ptr), align 1024, !tbaa !5
  %2 = or i32 %1, 1
  store volatile i32 %2, ptr inttoptr (i64 1476410368 to ptr), align 1024, !tbaa !5
  %3 = tail call i32 @HAL_GetTick()
  br label %4

4:                                                ; preds = %8, %0
  %5 = load volatile i32, ptr inttoptr (i64 1476410368 to ptr), align 1024, !tbaa !5
  %6 = and i32 %5, 8
  %7 = icmp eq i32 %6, 0
  br i1 %7, label %8, label %12

8:                                                ; preds = %4
  %9 = tail call i32 @HAL_GetTick()
  %10 = sub i32 %9, %3
  %11 = icmp ugt i32 %10, 10
  br i1 %11, label %12, label %4, !llvm.loop !10

12:                                               ; preds = %4, %8
  %.0 = phi i32 [ 3, %8 ], [ 0, %4 ]
  ret i32 %.0
}

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" }

!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 0}
!6 = !{!"", !7, i64 0, !7, i64 4}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = distinct !{!10, !11}
!11 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: GlobalOptPass,IPSCCPPass,InferAlignmentPass,InferFunctionAttrsPass,InstCombinePass,SROAPass,SimplifyCFGPass,TailCallElimPass