; LLVM IR from narke/Aragveli :: src/kernel/arch/x86 (acpi)

; 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 @AcpiInit() #0 {
  %1 = alloca ptr, align 8
  %2 = alloca ptr, align 8
  %3 = alloca i64, align 8
  %4 = alloca i32, align 4
  call void @llvm.lifetime.start.p0(i64 8, ptr %1) #2
  store ptr inttoptr (i64 917504 to ptr), ptr %1, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %2) #2
  store ptr inttoptr (i64 1048575 to ptr), ptr %2, align 8, !tbaa !5
  br label %5

5:                                                ; preds = %25, %0
  %6 = load ptr, ptr %1, align 8, !tbaa !5
  %7 = load ptr, ptr %2, align 8, !tbaa !5
  %8 = icmp ult ptr %6, %7
  br i1 %8, label %9, label %26

9:                                                ; preds = %5
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #2
  %10 = load ptr, ptr %1, align 8, !tbaa !5
  %11 = load i64, ptr %10, align 8, !tbaa !9
  store i64 %11, ptr %3, align 8, !tbaa !9
  %12 = load i64, ptr %3, align 8, !tbaa !9
  %13 = icmp eq i64 %12, 2329016660419433298
  br i1 %13, label %14, label %20

14:                                               ; preds = %9
  %15 = load ptr, ptr %1, align 8, !tbaa !5
  %16 = call i32 @AcpiParseRsdp(ptr noundef %15)
  %17 = icmp ne i32 %16, 0
  br i1 %17, label %18, label %19

18:                                               ; preds = %14
  store i32 3, ptr %4, align 4
  br label %23

19:                                               ; preds = %14
  br label %20

20:                                               ; preds = %19, %9
  %21 = load ptr, ptr %1, align 8, !tbaa !5
  %22 = getelementptr inbounds i8, ptr %21, i64 16
  store ptr %22, ptr %1, align 8, !tbaa !5
  store i32 0, ptr %4, align 4
  br label %23

23:                                               ; preds = %20, %18
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #2
  %24 = load i32, ptr %4, align 4
  switch i32 %24, label %27 [
    i32 0, label %25
    i32 3, label %26
  ]

25:                                               ; preds = %23
  br label %5, !llvm.loop !11

26:                                               ; preds = %23, %5
  call void @llvm.lifetime.end.p0(i64 8, ptr %2) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %1) #2
  ret void

27:                                               ; preds = %23
  unreachable
}

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

; Function Attrs: nounwind uwtable
declare hidden i32 @AcpiParseRsdp(ptr noundef) #0

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #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 = { 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, !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 = !{!"long long", !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
define dso_local void @AcpiInit() local_unnamed_addr #0 {
  br label %.backedge

.backedge:                                        ; preds = %.backedge.backedge, %0
  %.0610 = phi ptr [ inttoptr (i64 917504 to ptr), %0 ], [ %.0610.be, %.backedge.backedge ]
  %1 = load i64, ptr %.0610, align 8, !tbaa !5
  %2 = icmp eq i64 %1, 2329016660419433298
  br i1 %2, label %3, label %7

3:                                                ; preds = %.backedge
  %4 = tail call i32 @AcpiParseRsdp(ptr noundef nonnull %.0610)
  %.not = icmp eq i32 %4, 0
  %5 = getelementptr inbounds i8, ptr %.0610, i64 16
  %6 = icmp ult ptr %5, inttoptr (i64 1048575 to ptr)
  %or.cond = select i1 %.not, i1 %6, i1 false
  br i1 %or.cond, label %.backedge.backedge, label %.thread

7:                                                ; preds = %.backedge
  %.old = getelementptr inbounds i8, ptr %.0610, i64 16
  %.old11 = icmp ult ptr %.old, inttoptr (i64 1048575 to ptr)
  br i1 %.old11, label %.backedge.backedge, label %.thread

.backedge.backedge:                               ; preds = %7, %3
  %.0610.be = phi ptr [ %.old, %7 ], [ %5, %3 ]
  br label %.backedge

.thread:                                          ; preds = %3, %7
  ret void
}

; Function Attrs: nounwind uwtable
declare hidden i32 @AcpiParseRsdp(ptr noundef) local_unnamed_addr #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, !6, i64 0}
!6 = !{!"long long", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}


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