; LLVM IR from PaddlePaddle/Paddle :: paddle/phi/core/platform/timer.ll (ZN6paddle8platform5Timer6TickusEv)

; 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"

%"class.paddle::platform::Timer" = type <{ %struct.timeval, %struct.timeval, i32, [4 x i8], i64, i8, [7 x i8] }>
%struct.timeval = type { i64, i64 }

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef i64 @_ZN6paddle8platform5Timer6TickusEv(ptr noundef nonnull align 8 dereferenceable(49) %0) #0 align 2 {
  %2 = alloca ptr, align 8
  store ptr %0, ptr %2, align 8, !tbaa !5
  %3 = load ptr, ptr %2, align 8
  %4 = getelementptr inbounds %"class.paddle::platform::Timer", ptr %3, i32 0, i32 1
  %5 = call i32 @gettimeofday(ptr noundef %4, ptr noundef null) #2
  %6 = getelementptr inbounds %"class.paddle::platform::Timer", ptr %3, i32 0, i32 1
  %7 = getelementptr inbounds %struct.timeval, ptr %6, i32 0, i32 0
  %8 = load i64, ptr %7, align 8, !tbaa !9
  %9 = getelementptr inbounds %"class.paddle::platform::Timer", ptr %3, i32 0, i32 0
  %10 = getelementptr inbounds %struct.timeval, ptr %9, i32 0, i32 0
  %11 = load i64, ptr %10, align 8, !tbaa !15
  %12 = sub nsw i64 %8, %11
  %13 = mul nsw i64 %12, 1000
  %14 = mul nsw i64 %13, 1000
  %15 = getelementptr inbounds %"class.paddle::platform::Timer", ptr %3, i32 0, i32 1
  %16 = getelementptr inbounds %struct.timeval, ptr %15, i32 0, i32 1
  %17 = load i64, ptr %16, align 8, !tbaa !16
  %18 = getelementptr inbounds %"class.paddle::platform::Timer", ptr %3, i32 0, i32 0
  %19 = getelementptr inbounds %struct.timeval, ptr %18, i32 0, i32 1
  %20 = load i64, ptr %19, align 8, !tbaa !17
  %21 = sub nsw i64 %17, %20
  %22 = add nsw i64 %14, %21
  ret i64 %22
}

; Function Attrs: nounwind
declare i32 @gettimeofday(ptr noundef, ptr noundef) #1

attributes #0 = { mustprogress 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 = { 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 = { 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++ TBAA"}
!9 = !{!10, !12, i64 16}
!10 = !{!"_ZTSN6paddle8platform5TimerE", !11, i64 0, !11, i64 16, !13, i64 32, !12, i64 40, !14, i64 48}
!11 = !{!"_ZTS7timeval", !12, i64 0, !12, i64 8}
!12 = !{!"long", !7, i64 0}
!13 = !{!"int", !7, i64 0}
!14 = !{!"bool", !7, i64 0}
!15 = !{!10, !12, i64 0}
!16 = !{!10, !12, i64 24}
!17 = !{!10, !12, i64 8}


; 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: mustprogress nofree nounwind uwtable
define dso_local noundef i64 @_ZN6paddle8platform5Timer6TickusEv(ptr nocapture noundef nonnull align 8 dereferenceable(49) %0) local_unnamed_addr #0 align 2 {
  %2 = getelementptr inbounds i8, ptr %0, i64 16
  %3 = tail call i32 @gettimeofday(ptr noundef nonnull %2, ptr noundef null) #2
  %4 = load i64, ptr %2, align 8, !tbaa !5
  %5 = load i64, ptr %0, align 8, !tbaa !13
  %6 = sub nsw i64 %4, %5
  %7 = mul i64 %6, 1000000
  %8 = getelementptr inbounds i8, ptr %0, i64 24
  %9 = load i64, ptr %8, align 8, !tbaa !14
  %10 = getelementptr inbounds i8, ptr %0, i64 8
  %11 = load i64, ptr %10, align 8, !tbaa !15
  %12 = sub i64 %9, %11
  %13 = add nsw i64 %12, %7
  ret i64 %13
}

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

attributes #0 = { 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 #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 = { 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, !8, i64 16}
!6 = !{!"_ZTSN6paddle8platform5TimerE", !7, i64 0, !7, i64 16, !11, i64 32, !8, i64 40, !12, i64 48}
!7 = !{!"_ZTS7timeval", !8, i64 0, !8, i64 8}
!8 = !{!"long", !9, i64 0}
!9 = !{!"omnipotent char", !10, i64 0}
!10 = !{!"Simple C++ TBAA"}
!11 = !{!"int", !9, i64 0}
!12 = !{!"bool", !9, i64 0}
!13 = !{!6, !8, i64 0}
!14 = !{!6, !8, i64 24}
!15 = !{!6, !8, i64 8}


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