; LLVM IR from InsightSoftwareConsortium/ITK :: Modules/ThirdParty/VNL/src/vxl/v3p/netlib/libf2c (etime_)

; 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.tms = type { i64, i64, i64, i64 }

; Function Attrs: nounwind uwtable
define dso_local double @etime_(ptr noundef %0) #0 {
  %2 = alloca ptr, align 8
  %3 = alloca %struct.tms, align 8
  store ptr %0, ptr %2, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 32, ptr %3) #3
  %4 = call i64 @times(ptr noundef %3) #3
  %5 = getelementptr inbounds %struct.tms, ptr %3, i32 0, i32 0
  %6 = load i64, ptr %5, align 8, !tbaa !9
  %7 = sitofp i64 %6 to double
  %8 = fdiv double %7, 6.000000e+01
  %9 = fptrunc double %8 to float
  %10 = load ptr, ptr %2, align 8, !tbaa !5
  %11 = getelementptr inbounds float, ptr %10, i64 0
  store float %9, ptr %11, align 4, !tbaa !12
  %12 = getelementptr inbounds %struct.tms, ptr %3, i32 0, i32 1
  %13 = load i64, ptr %12, align 8, !tbaa !14
  %14 = sitofp i64 %13 to double
  %15 = fdiv double %14, 6.000000e+01
  %16 = fptrunc double %15 to float
  %17 = load ptr, ptr %2, align 8, !tbaa !5
  %18 = getelementptr inbounds float, ptr %17, i64 1
  store float %16, ptr %18, align 4, !tbaa !12
  %19 = fadd float %9, %16
  %20 = fpext float %19 to double
  call void @llvm.lifetime.end.p0(i64 32, ptr %3) #3
  ret double %20
}

; 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 i64 @times(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 = { 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/C++ TBAA"}
!9 = !{!10, !11, i64 0}
!10 = !{!"tms", !11, i64 0, !11, i64 8, !11, i64 16, !11, i64 24}
!11 = !{!"long", !7, i64 0}
!12 = !{!13, !13, i64 0}
!13 = !{!"float", !7, i64 0}
!14 = !{!10, !11, 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"

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

; Function Attrs: nofree nounwind uwtable
define dso_local double @etime_(ptr nocapture noundef writeonly %0) local_unnamed_addr #0 {
  %2 = alloca %struct.tms, align 16
  call void @llvm.lifetime.start.p0(i64 32, ptr nonnull %2) #3
  %3 = call i64 @times(ptr noundef nonnull %2) #3
  %4 = load <2 x i64>, ptr %2, align 16, !tbaa !5
  %5 = sitofp <2 x i64> %4 to <2 x double>
  %6 = fdiv <2 x double> %5, <double 6.000000e+01, double 6.000000e+01>
  %7 = fptrunc <2 x double> %6 to <2 x float>
  store <2 x float> %7, ptr %0, align 4, !tbaa !9
  %shift = shufflevector <2 x float> %7, <2 x float> poison, <2 x i32> <i32 1, i32 poison>
  %8 = fadd <2 x float> %shift, %7
  %9 = extractelement <2 x float> %8, i64 0
  %10 = fpext float %9 to double
  call void @llvm.lifetime.end.p0(i64 32, ptr nonnull %2) #3
  ret double %10
}

; 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 i64 @times(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 = { 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, !6, i64 0}
!6 = !{!"long", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"float", !7, i64 0}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,InferAlignmentPass,InferFunctionAttrsPass,InstCombinePass,PostOrderFunctionAttrsPass,SLPVectorizerPass,SROAPass,VectorCombinePass