; LLVM IR from xing1357/SimpleOS :: src (pmm)

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

@g_pmm_info = external hidden global %struct.PMM_INFO, align 8

; 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 void @pmm_deinit_region(i32 noundef %0, i32 noundef %1) #1 {
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  store i32 %0, ptr %3, align 4, !tbaa !5
  store i32 %1, ptr %4, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #3
  %7 = load i32, ptr %3, align 4, !tbaa !5
  %8 = udiv i32 %7, 4096
  store i32 %8, ptr %5, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #3
  %9 = load i32, ptr %4, align 4, !tbaa !5
  %10 = udiv i32 %9, 4096
  store i32 %10, ptr %6, align 4, !tbaa !5
  br label %11

11:                                               ; preds = %14, %2
  %12 = load i32, ptr %6, align 4, !tbaa !5
  %13 = icmp sge i32 %12, 0
  br i1 %13, label %14, label %21

14:                                               ; preds = %11
  %15 = load i32, ptr %5, align 4, !tbaa !5
  %16 = add nsw i32 %15, 1
  store i32 %16, ptr %5, align 4, !tbaa !5
  call void @pmm_mmap_set(i32 noundef %15)
  %17 = load i32, ptr getelementptr inbounds (%struct.PMM_INFO, ptr @g_pmm_info, i32 0, i32 4), align 4, !tbaa !9
  %18 = add i32 %17, 1
  store i32 %18, ptr getelementptr inbounds (%struct.PMM_INFO, ptr @g_pmm_info, i32 0, i32 4), align 4, !tbaa !9
  %19 = load i32, ptr %6, align 4, !tbaa !5
  %20 = add nsw i32 %19, -1
  store i32 %20, ptr %6, align 4, !tbaa !5
  br label %11, !llvm.loop !12

21:                                               ; preds = %11
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #3
  ret void
}

; Function Attrs: inlinehint nounwind uwtable
declare hidden void @pmm_mmap_set(i32 noundef) #2

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 = { inlinehint 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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !6, i64 20}
!10 = !{!"", !6, i64 0, !6, i64 4, !11, i64 8, !6, i64 16, !6, i64 20}
!11 = !{!"any pointer", !7, i64 0}
!12 = distinct !{!12, !13}
!13 = !{!"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"

%struct.PMM_INFO = type { i32, i32, ptr, i32, i32 }

@g_pmm_info = external hidden local_unnamed_addr global %struct.PMM_INFO, align 8

; Function Attrs: nounwind uwtable
define dso_local void @pmm_deinit_region(i32 noundef %0, i32 noundef %1) local_unnamed_addr #0 {
  %3 = lshr i32 %0, 12
  %4 = lshr i32 %1, 12
  br label %5

5:                                                ; preds = %2, %5
  %.07 = phi i32 [ %4, %2 ], [ %9, %5 ]
  %.056 = phi i32 [ %3, %2 ], [ %6, %5 ]
  %6 = add nuw nsw i32 %.056, 1
  tail call void @pmm_mmap_set(i32 noundef %.056)
  %7 = load i32, ptr getelementptr inbounds (i8, ptr @g_pmm_info, i64 20), align 4, !tbaa !5
  %8 = add i32 %7, 1
  store i32 %8, ptr getelementptr inbounds (i8, ptr @g_pmm_info, i64 20), align 4, !tbaa !5
  %9 = add nsw i32 %.07, -1
  %.not = icmp eq i32 %.07, 0
  br i1 %.not, label %10, label %5, !llvm.loop !11

10:                                               ; preds = %5
  ret void
}

; Function Attrs: inlinehint nounwind uwtable
declare hidden void @pmm_mmap_set(i32 noundef) local_unnamed_addr #1

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 = { inlinehint 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 20}
!6 = !{!"", !7, i64 0, !7, i64 4, !10, i64 8, !7, i64 16, !7, i64 20}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"any pointer", !8, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: CorrelatedValuePropagationPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,LoopRotatePass,SROAPass,TailCallElimPass