; LLVM IR from DanEngelbrecht/longtail :: cmd/lib/minifb/ext/minifb/src (MiniFB_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"

%struct.mfb_timer = type { i64, i64, i64 }

@g_timer_resolution = external dso_local 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

declare i64 @mfb_timer_tick() #1

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

8:                                                ; preds = %1
  store double 0.000000e+00, ptr %2, align 8
  store i32 1, ptr %5, align 4
  br label %29

9:                                                ; preds = %1
  %10 = call i64 @mfb_timer_tick()
  store i64 %10, ptr %4, align 8, !tbaa !9
  %11 = load i64, ptr %4, align 8, !tbaa !9
  %12 = load ptr, ptr %3, align 8, !tbaa !5
  %13 = getelementptr inbounds %struct.mfb_timer, ptr %12, i32 0, i32 0
  %14 = load i64, ptr %13, align 8, !tbaa !11
  %15 = sub i64 %11, %14
  %16 = load ptr, ptr %3, align 8, !tbaa !5
  %17 = getelementptr inbounds %struct.mfb_timer, ptr %16, i32 0, i32 2
  %18 = load i64, ptr %17, align 8, !tbaa !13
  %19 = add i64 %18, %15
  store i64 %19, ptr %17, align 8, !tbaa !13
  %20 = load i64, ptr %4, align 8, !tbaa !9
  %21 = load ptr, ptr %3, align 8, !tbaa !5
  %22 = getelementptr inbounds %struct.mfb_timer, ptr %21, i32 0, i32 0
  store i64 %20, ptr %22, align 8, !tbaa !11
  %23 = load ptr, ptr %3, align 8, !tbaa !5
  %24 = getelementptr inbounds %struct.mfb_timer, ptr %23, i32 0, i32 2
  %25 = load i64, ptr %24, align 8, !tbaa !13
  %26 = uitofp i64 %25 to double
  %27 = load double, ptr @g_timer_resolution, align 8, !tbaa !14
  %28 = fmul double %26, %27
  store double %28, ptr %2, align 8
  store i32 1, ptr %5, align 4
  br label %29

29:                                               ; preds = %9, %8
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #3
  %30 = load double, ptr %2, align 8
  ret double %30
}

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 = { 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 #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 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"long", !7, i64 0}
!11 = !{!12, !10, i64 0}
!12 = !{!"mfb_timer", !10, i64 0, !10, i64 8, !10, i64 16}
!13 = !{!12, !10, i64 16}
!14 = !{!15, !15, i64 0}
!15 = !{!"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"

@g_timer_resolution = external dso_local local_unnamed_addr global double, align 8

declare i64 @mfb_timer_tick() local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local double @mfb_timer_now(ptr noundef %0) local_unnamed_addr #1 {
  %2 = icmp eq ptr %0, null
  br i1 %2, label %13, label %3

3:                                                ; preds = %1
  %4 = tail call i64 @mfb_timer_tick() #2
  %5 = load i64, ptr %0, align 8, !tbaa !5
  %6 = sub i64 %4, %5
  %7 = getelementptr inbounds i8, ptr %0, i64 16
  %8 = load i64, ptr %7, align 8, !tbaa !10
  %9 = add i64 %8, %6
  store i64 %9, ptr %7, align 8, !tbaa !10
  store i64 %4, ptr %0, align 8, !tbaa !5
  %10 = uitofp i64 %9 to double
  %11 = load double, ptr @g_timer_resolution, align 8, !tbaa !11
  %12 = fmul double %11, %10
  br label %13

13:                                               ; preds = %1, %3
  %.0 = phi double [ %12, %3 ], [ 0.000000e+00, %1 ]
  ret double %.0
}

attributes #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 = { 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 = { 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, !7, i64 0}
!6 = !{!"mfb_timer", !7, i64 0, !7, i64 8, !7, i64 16}
!7 = !{!"long", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!6, !7, i64 16}
!11 = !{!12, !12, i64 0}
!12 = !{!"double", !8, i64 0}


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