; LLVM IR from libxsmm/libxsmm :: src (libxsmm_timer)

; 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"

@libxsmm_timer_scale = external global double, 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 double @libxsmm_timer_duration(i64 noundef %0, i64 noundef %1) #1 {
  %3 = alloca i64, align 8
  %4 = alloca i64, align 8
  %5 = alloca double, align 8
  store i64 %0, ptr %3, align 8, !tbaa !5
  store i64 %1, ptr %4, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #3
  %6 = load double, ptr @libxsmm_timer_scale, align 8, !tbaa !9
  %7 = fcmp olt double 0.000000e+00, %6
  br i1 %7, label %8, label %25

8:                                                ; preds = %2
  %9 = load i64, ptr %3, align 8, !tbaa !5
  %10 = load i64, ptr %4, align 8, !tbaa !5
  %11 = icmp ult i64 %9, %10
  br i1 %11, label %12, label %16

12:                                               ; preds = %8
  %13 = load i64, ptr %4, align 8, !tbaa !5
  %14 = load i64, ptr %3, align 8, !tbaa !5
  %15 = sub i64 %13, %14
  br label %20

16:                                               ; preds = %8
  %17 = load i64, ptr %3, align 8, !tbaa !5
  %18 = load i64, ptr %4, align 8, !tbaa !5
  %19 = sub i64 %17, %18
  br label %20

20:                                               ; preds = %16, %12
  %21 = phi i64 [ %15, %12 ], [ %19, %16 ]
  %22 = uitofp i64 %21 to double
  %23 = load double, ptr @libxsmm_timer_scale, align 8, !tbaa !9
  %24 = fmul double %22, %23
  store double %24, ptr %5, align 8, !tbaa !9
  br label %29

25:                                               ; preds = %2
  %26 = load i64, ptr %3, align 8, !tbaa !5
  %27 = load i64, ptr %4, align 8, !tbaa !5
  %28 = call double @libxsmm_timer_duration_rtc(i64 noundef %26, i64 noundef %27)
  store double %28, ptr %5, align 8, !tbaa !9
  br label %29

29:                                               ; preds = %25, %20
  %30 = load double, ptr %5, align 8, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #3
  ret double %30
}

declare double @libxsmm_timer_duration_rtc(i64 noundef, i64 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 = { "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 = !{!"long long", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"double", !7, i64 0}


; 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"

@libxsmm_timer_scale = external local_unnamed_addr global double, align 8

; Function Attrs: nounwind uwtable
define dso_local double @libxsmm_timer_duration(i64 noundef %0, i64 noundef %1) local_unnamed_addr #0 {
  %3 = load double, ptr @libxsmm_timer_scale, align 8, !tbaa !5
  %4 = fcmp ogt double %3, 0.000000e+00
  br i1 %4, label %5, label %12

5:                                                ; preds = %2
  %6 = icmp ult i64 %0, %1
  %7 = sub i64 %1, %0
  %8 = sub i64 %0, %1
  %9 = select i1 %6, i64 %7, i64 %8
  %10 = uitofp i64 %9 to double
  %11 = fmul double %3, %10
  br label %14

12:                                               ; preds = %2
  %13 = tail call double @libxsmm_timer_duration_rtc(i64 noundef %0, i64 noundef %1) #2
  br label %14

14:                                               ; preds = %12, %5
  %.0 = phi double [ %11, %5 ], [ %13, %12 ]
  ret double %.0
}

declare double @libxsmm_timer_duration_rtc(i64 noundef, i64 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 = { "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 = { 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 = !{!"double", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}


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