; LLVM IR from ermig1979/Simd :: src/Simd/SimdBaseCpu.ll (ZN4Simd4Base13CpuCoreNumberEv)

; 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"

@.str.1 = external hidden unnamed_addr constant [2 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [86 x i8], align 1

; 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

declare noalias ptr @popen(ptr noundef, ptr noundef) #1

declare ptr @fgets(ptr noundef, i32 noundef, ptr noundef) #1

; Function Attrs: inlinehint mustprogress nounwind willreturn memory(read) uwtable
declare i32 @atoi(ptr noundef nonnull) #2

declare i32 @pclose(ptr noundef) #1

; Function Attrs: mustprogress uwtable
define dso_local noundef i64 @_ZN4Simd4Base13CpuCoreNumberEv() #3 {
  %1 = alloca i32, align 4
  %2 = alloca ptr, align 8
  %3 = alloca [4096 x i8], align 16
  call void @llvm.lifetime.start.p0(i64 4, ptr %1) #4
  store i32 0, ptr %1, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %2) #4
  %4 = call noalias ptr @popen(ptr noundef @.str.2, ptr noundef @.str.1)
  store ptr %4, ptr %2, align 8, !tbaa !9
  %5 = load ptr, ptr %2, align 8, !tbaa !9
  %6 = icmp ne ptr %5, null
  br i1 %6, label %7, label %19

7:                                                ; preds = %0
  call void @llvm.lifetime.start.p0(i64 4096, ptr %3) #4
  br label %8

8:                                                ; preds = %13, %7
  %9 = getelementptr inbounds [4096 x i8], ptr %3, i64 0, i64 0
  %10 = load ptr, ptr %2, align 8, !tbaa !9
  %11 = call ptr @fgets(ptr noundef %9, i32 noundef 4096, ptr noundef %10)
  %12 = icmp ne ptr %11, null
  br i1 %12, label %13, label %14

13:                                               ; preds = %8
  br label %8, !llvm.loop !11

14:                                               ; preds = %8
  %15 = getelementptr inbounds [4096 x i8], ptr %3, i64 0, i64 0
  %16 = call i32 @atoi(ptr noundef %15) #5
  store i32 %16, ptr %1, align 4, !tbaa !5
  %17 = load ptr, ptr %2, align 8, !tbaa !9
  %18 = call i32 @pclose(ptr noundef %17)
  call void @llvm.lifetime.end.p0(i64 4096, ptr %3) #4
  br label %19

19:                                               ; preds = %14, %0
  %20 = load i32, ptr %1, align 4, !tbaa !5
  %21 = zext i32 %20 to i64
  call void @llvm.lifetime.end.p0(i64 8, ptr %2) #4
  call void @llvm.lifetime.end.p0(i64 4, ptr %1) #4
  ret i64 %21
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 = { inlinehint mustprogress nounwind willreturn memory(read) 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 = { mustprogress 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 #4 = { nounwind }
attributes #5 = { nounwind willreturn memory(read) }

!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++ 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"

@.str.1 = external hidden unnamed_addr constant [2 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [86 x i8], align 1

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nofree nounwind
declare noalias noundef ptr @popen(ptr nocapture noundef readonly, ptr nocapture noundef readonly) local_unnamed_addr #1

; Function Attrs: nofree nounwind
declare noundef ptr @fgets(ptr noundef, i32 noundef, ptr nocapture noundef) local_unnamed_addr #1

; Function Attrs: inlinehint mustprogress nofree nounwind willreturn memory(read) uwtable
declare i32 @atoi(ptr nocapture noundef nonnull) local_unnamed_addr #2

; Function Attrs: nofree nounwind
declare noundef i32 @pclose(ptr nocapture noundef) local_unnamed_addr #1

; Function Attrs: mustprogress nofree nounwind uwtable
define dso_local noundef range(i64 0, 4294967296) i64 @_ZN4Simd4Base13CpuCoreNumberEv() local_unnamed_addr #3 {
  %1 = alloca [4096 x i8], align 16
  %2 = tail call noalias ptr @popen(ptr noundef nonnull @.str.2, ptr noundef nonnull @.str.1)
  %.not = icmp eq ptr %2, null
  br i1 %.not, label %10, label %3

3:                                                ; preds = %0
  call void @llvm.lifetime.start.p0(i64 4096, ptr nonnull %1) #4
  br label %4

4:                                                ; preds = %4, %3
  %5 = call ptr @fgets(ptr noundef nonnull %1, i32 noundef 4096, ptr noundef nonnull %2)
  %.not4 = icmp eq ptr %5, null
  br i1 %.not4, label %6, label %4, !llvm.loop !5

6:                                                ; preds = %4
  %7 = call i32 @atoi(ptr nocapture noundef %1) #5
  %8 = call i32 @pclose(ptr noundef nonnull %2)
  call void @llvm.lifetime.end.p0(i64 4096, ptr nonnull %1) #4
  %9 = zext i32 %7 to i64
  br label %10

10:                                               ; preds = %6, %0
  %.0 = phi i64 [ %9, %6 ], [ 0, %0 ]
  ret i64 %.0
}

attributes #0 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { nofree nounwind "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 mustprogress nofree nounwind willreturn memory(read) 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 = { mustprogress nofree 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 #4 = { nounwind }
attributes #5 = { nounwind willreturn memory(read) }

!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 = distinct !{!5, !6}
!6 = !{!"llvm.loop.mustprogress"}


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