; LLVM IR from SourangshuGhosh/Fluid-Simulation-for-Computer-Graphics :: src/stopwatch.ll (ZN9StopWatch5startEv)

; 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.timeval = type { i64, i64 }
%class.StopWatch = type { i8, double, double, double }

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_ZN9StopWatch5startEv(ptr noundef nonnull align 8 dereferenceable(32) %0) #0 align 2 {
  %2 = alloca ptr, align 8
  %3 = alloca %struct.timeval, align 8
  store ptr %0, ptr %2, align 8, !tbaa !5
  %4 = load ptr, ptr %2, align 8
  call void @llvm.lifetime.start.p0(i64 16, ptr %3) #3
  %5 = call i32 @gettimeofday(ptr noundef %3, ptr noundef null) #3
  %6 = getelementptr inbounds %struct.timeval, ptr %3, i32 0, i32 0
  %7 = load i64, ptr %6, align 8, !tbaa !9
  %8 = sitofp i64 %7 to double
  %9 = getelementptr inbounds %struct.timeval, ptr %3, i32 0, i32 1
  %10 = load i64, ptr %9, align 8, !tbaa !12
  %11 = sitofp i64 %10 to double
  %12 = fdiv double %11, 1.000000e+06
  %13 = fadd double %8, %12
  %14 = getelementptr inbounds %class.StopWatch, ptr %4, i32 0, i32 1
  store double %13, ptr %14, align 8, !tbaa !13
  %15 = getelementptr inbounds %class.StopWatch, ptr %4, i32 0, i32 0
  store i8 1, ptr %15, align 8, !tbaa !17
  call void @llvm.lifetime.end.p0(i64 16, ptr %3) #3
  ret void
}

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nounwind
declare i32 @gettimeofday(ptr noundef, ptr noundef) #2

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #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 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { 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 #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++ TBAA"}
!9 = !{!10, !11, i64 0}
!10 = !{!"_ZTS7timeval", !11, i64 0, !11, i64 8}
!11 = !{!"long", !7, i64 0}
!12 = !{!10, !11, i64 8}
!13 = !{!14, !16, i64 8}
!14 = !{!"_ZTS9StopWatch", !15, i64 0, !16, i64 8, !16, i64 16, !16, i64 24}
!15 = !{!"bool", !7, i64 0}
!16 = !{!"double", !7, i64 0}
!17 = !{!14, !15, 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"

%struct.timeval = type { i64, i64 }

; Function Attrs: mustprogress nofree nounwind uwtable
define dso_local void @_ZN9StopWatch5startEv(ptr nocapture noundef nonnull writeonly align 8 dereferenceable(32) %0) local_unnamed_addr #0 align 2 {
  %2 = alloca %struct.timeval, align 8
  call void @llvm.lifetime.start.p0(i64 16, ptr nonnull %2) #3
  %3 = call i32 @gettimeofday(ptr noundef nonnull %2, ptr noundef null) #3
  %4 = load i64, ptr %2, align 8, !tbaa !5
  %5 = sitofp i64 %4 to double
  %6 = getelementptr inbounds i8, ptr %2, i64 8
  %7 = load i64, ptr %6, align 8, !tbaa !10
  %8 = sitofp i64 %7 to double
  %9 = fdiv double %8, 1.000000e+06
  %10 = fadd double %9, %5
  %11 = getelementptr inbounds i8, ptr %0, i64 8
  store double %10, ptr %11, align 8, !tbaa !11
  store i8 1, ptr %0, align 8, !tbaa !15
  call void @llvm.lifetime.end.p0(i64 16, ptr nonnull %2) #3
  ret void
}

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nofree nounwind
declare noundef i32 @gettimeofday(ptr nocapture noundef, ptr nocapture noundef) local_unnamed_addr #2

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #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 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { 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 #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, !7, i64 0}
!6 = !{!"_ZTS7timeval", !7, i64 0, !7, i64 8}
!7 = !{!"long", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}
!10 = !{!6, !7, i64 8}
!11 = !{!12, !14, i64 8}
!12 = !{!"_ZTS9StopWatch", !13, i64 0, !14, i64 8, !14, i64 16, !14, i64 24}
!13 = !{!"bool", !8, i64 0}
!14 = !{!"double", !8, i64 0}
!15 = !{!12, !13, i64 0}


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