; LLVM IR from ssvb/tinymembench :: asm-opt (check_cpu_feature)

; 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 i32 @check_cpu_feature(ptr noundef %0) #0 {
  %2 = alloca i32, align 4
  %3 = alloca ptr, align 8
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #2
  store i32 1024, ptr %4, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #2
  br label %7

7:                                                ; preds = %18, %1
  %8 = load i32, ptr %4, align 4, !tbaa !9
  %9 = load ptr, ptr %3, align 8, !tbaa !5
  %10 = call i32 @parse_proc_cpuinfo(i32 noundef %8, ptr noundef %9)
  store i32 %10, ptr %5, align 4, !tbaa !9
  %11 = icmp eq i32 %10, -1
  br i1 %11, label %12, label %19

12:                                               ; preds = %7
  %13 = load i32, ptr %4, align 4, !tbaa !9
  %14 = mul nsw i32 %13, 2
  store i32 %14, ptr %4, align 4, !tbaa !9
  %15 = load i32, ptr %4, align 4, !tbaa !9
  %16 = icmp sgt i32 %15, 1048576
  br i1 %16, label %17, label %18

17:                                               ; preds = %12
  store i32 0, ptr %2, align 4
  store i32 1, ptr %6, align 4
  br label %21

18:                                               ; preds = %12
  br label %7, !llvm.loop !11

19:                                               ; preds = %7
  %20 = load i32, ptr %5, align 4, !tbaa !9
  store i32 %20, ptr %2, align 4
  store i32 1, ptr %6, align 4
  br label %21

21:                                               ; preds = %19, %17
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #2
  %22 = load i32, ptr %2, align 4
  ret i32 %22
}

; 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 @parse_proc_cpuinfo(i32 noundef, 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 = !{!"int", !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 range(i32 0, -1) i32 @check_cpu_feature(ptr noundef %0) local_unnamed_addr #0 {
  %2 = tail call i32 @parse_proc_cpuinfo(i32 noundef 1024, ptr noundef %0)
  %3 = icmp eq i32 %2, -1
  br i1 %3, label %4, label %34

4:                                                ; preds = %1
  %5 = tail call i32 @parse_proc_cpuinfo(i32 noundef 2048, ptr noundef %0)
  %6 = icmp eq i32 %5, -1
  br i1 %6, label %7, label %34

7:                                                ; preds = %4
  %8 = tail call i32 @parse_proc_cpuinfo(i32 noundef 4096, ptr noundef %0)
  %9 = icmp eq i32 %8, -1
  br i1 %9, label %10, label %34

10:                                               ; preds = %7
  %11 = tail call i32 @parse_proc_cpuinfo(i32 noundef 8192, ptr noundef %0)
  %12 = icmp eq i32 %11, -1
  br i1 %12, label %13, label %34

13:                                               ; preds = %10
  %14 = tail call i32 @parse_proc_cpuinfo(i32 noundef 16384, ptr noundef %0)
  %15 = icmp eq i32 %14, -1
  br i1 %15, label %16, label %34

16:                                               ; preds = %13
  %17 = tail call i32 @parse_proc_cpuinfo(i32 noundef 32768, ptr noundef %0)
  %18 = icmp eq i32 %17, -1
  br i1 %18, label %19, label %34

19:                                               ; preds = %16
  %20 = tail call i32 @parse_proc_cpuinfo(i32 noundef 65536, ptr noundef %0)
  %21 = icmp eq i32 %20, -1
  br i1 %21, label %22, label %34

22:                                               ; preds = %19
  %23 = tail call i32 @parse_proc_cpuinfo(i32 noundef 131072, ptr noundef %0)
  %24 = icmp eq i32 %23, -1
  br i1 %24, label %25, label %34

25:                                               ; preds = %22
  %26 = tail call i32 @parse_proc_cpuinfo(i32 noundef 262144, ptr noundef %0)
  %27 = icmp eq i32 %26, -1
  br i1 %27, label %28, label %34

28:                                               ; preds = %25
  %29 = tail call i32 @parse_proc_cpuinfo(i32 noundef 524288, ptr noundef %0)
  %30 = icmp eq i32 %29, -1
  br i1 %30, label %31, label %34

31:                                               ; preds = %28
  %32 = tail call i32 @parse_proc_cpuinfo(i32 noundef 1048576, ptr noundef %0)
  %33 = icmp eq i32 %32, -1
  %spec.select = select i1 %33, i32 0, i32 %32
  br label %34

34:                                               ; preds = %31, %28, %25, %22, %19, %16, %13, %10, %7, %4, %1
  %.0 = phi i32 [ %2, %1 ], [ %5, %4 ], [ %8, %7 ], [ %11, %10 ], [ %14, %13 ], [ %17, %16 ], [ %20, %19 ], [ %23, %22 ], [ %26, %25 ], [ %29, %28 ], [ %spec.select, %31 ]
  ret i32 %.0
}

; Function Attrs: nounwind uwtable
declare hidden i32 @parse_proc_cpuinfo(i32 noundef, 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)"}


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