; LLVM IR from intel/intel-ipsec-mb :: perf (msr)

; 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"

@m_maxcores = external hidden global i32, align 4
@m_msr_fd = external hidden global ptr, align 8

; Function Attrs: nounwind uwtable
define dso_local i32 @machine_init(i32 noundef %0) #0 {
  %2 = alloca i32, align 4
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  store i32 %0, ptr %3, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #3
  %6 = load i32, ptr %3, align 4, !tbaa !5
  %7 = icmp eq i32 %6, 0
  br i1 %7, label %8, label %9

8:                                                ; preds = %1
  store i32 2, ptr %2, align 4
  store i32 1, ptr %5, align 4
  br label %33

9:                                                ; preds = %1
  %10 = load i32, ptr %3, align 4, !tbaa !5
  %11 = add i32 %10, 1
  store i32 %11, ptr @m_maxcores, align 4, !tbaa !5
  %12 = load i32, ptr @m_maxcores, align 4, !tbaa !5
  %13 = zext i32 %12 to i64
  %14 = mul i64 %13, 4
  %15 = call noalias ptr @malloc(i64 noundef %14) #4
  store ptr %15, ptr @m_msr_fd, align 8, !tbaa !9
  %16 = load ptr, ptr @m_msr_fd, align 8, !tbaa !9
  %17 = icmp eq ptr %16, null
  br i1 %17, label %18, label %19

18:                                               ; preds = %9
  store i32 0, ptr @m_maxcores, align 4, !tbaa !5
  store i32 1, ptr %2, align 4
  store i32 1, ptr %5, align 4
  br label %33

19:                                               ; preds = %9
  store i32 0, ptr %4, align 4, !tbaa !5
  br label %20

20:                                               ; preds = %29, %19
  %21 = load i32, ptr %4, align 4, !tbaa !5
  %22 = load i32, ptr @m_maxcores, align 4, !tbaa !5
  %23 = icmp ult i32 %21, %22
  br i1 %23, label %24, label %32

24:                                               ; preds = %20
  %25 = load ptr, ptr @m_msr_fd, align 8, !tbaa !9
  %26 = load i32, ptr %4, align 4, !tbaa !5
  %27 = zext i32 %26 to i64
  %28 = getelementptr inbounds i32, ptr %25, i64 %27
  store i32 -1, ptr %28, align 4, !tbaa !5
  br label %29

29:                                               ; preds = %24
  %30 = load i32, ptr %4, align 4, !tbaa !5
  %31 = add i32 %30, 1
  store i32 %31, ptr %4, align 4, !tbaa !5
  br label %20, !llvm.loop !11

32:                                               ; preds = %20
  store i32 0, ptr %2, align 4
  store i32 1, ptr %5, align 4
  br label %33

33:                                               ; preds = %32, %18, %8
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #3
  %34 = load i32, ptr %2, align 4
  ret i32 %34
}

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

; Function Attrs: nounwind allocsize(0)
declare noalias ptr @malloc(i64 noundef) #2

; 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 allocsize(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 }
attributes #4 = { nounwind allocsize(0) }

!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, !10, i64 0}
!10 = !{!"any pointer", !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"

@m_maxcores = external hidden local_unnamed_addr global i32, align 4
@m_msr_fd = external hidden local_unnamed_addr global ptr, align 8

; Function Attrs: mustprogress nofree nounwind willreturn memory(write, argmem: none, inaccessiblemem: readwrite) uwtable
define dso_local range(i32 0, 3) i32 @machine_init(i32 noundef %0) local_unnamed_addr #0 {
  %2 = icmp eq i32 %0, 0
  br i1 %2, label %.loopexit, label %3

3:                                                ; preds = %1
  %4 = add i32 %0, 1
  store i32 %4, ptr @m_maxcores, align 4, !tbaa !5
  %5 = zext i32 %4 to i64
  %6 = shl nuw nsw i64 %5, 2
  %7 = tail call noalias ptr @malloc(i64 noundef %6) #3
  store ptr %7, ptr @m_msr_fd, align 8, !tbaa !9
  %8 = icmp eq ptr %7, null
  br i1 %8, label %9, label %.preheader

.preheader:                                       ; preds = %3
  %.not = icmp eq i32 %4, 0
  br i1 %.not, label %.loopexit, label %.lr.ph.preheader

.lr.ph.preheader:                                 ; preds = %.preheader
  tail call void @llvm.memset.p0.i64(ptr nonnull align 4 %7, i8 -1, i64 %6, i1 false), !tbaa !5
  br label %.loopexit

9:                                                ; preds = %3
  store i32 0, ptr @m_maxcores, align 4, !tbaa !5
  br label %.loopexit

.loopexit:                                        ; preds = %.lr.ph.preheader, %.preheader, %1, %9
  %.06 = phi i32 [ 1, %9 ], [ 2, %1 ], [ 0, %.preheader ], [ 0, %.lr.ph.preheader ]
  ret i32 %.06
}

; Function Attrs: mustprogress nofree nounwind willreturn allockind("alloc,uninitialized") allocsize(0) memory(inaccessiblemem: readwrite)
declare noalias noundef ptr @malloc(i64 noundef) local_unnamed_addr #1

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #2

attributes #0 = { mustprogress nofree nounwind willreturn memory(write, argmem: none, 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" }
attributes #1 = { mustprogress nofree nounwind willreturn allockind("alloc,uninitialized") allocsize(0) memory(inaccessiblemem: readwrite) "alloc-family"="malloc" "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 = { nocallback nofree nounwind willreturn memory(argmem: write) }
attributes #3 = { nounwind allocsize(0) }

!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, !10, i64 0}
!10 = !{!"any pointer", !7, i64 0}


; Effective O3 passes: CorrelatedValuePropagationPass,EarlyCSEPass,GVNPass,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,LICMPass,LoopIdiomRecognizePass,LoopRotatePass,LoopSimplifyPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass