; LLVM IR from NOAA-PMEL/Ferret :: external_functions/v5d (binio)

; 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"

; 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 @read(i32 noundef, ptr noundef, i64 noundef) #1

; Function Attrs: nounwind uwtable
define dso_local i32 @read_int4(i32 noundef %0, ptr noundef %1) #2 {
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  store i32 %0, ptr %4, align 4, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #3
  %8 = load i32, ptr %4, align 4, !tbaa !5
  %9 = call i64 @read(i32 noundef %8, ptr noundef %6, i64 noundef 4)
  %10 = icmp eq i64 %9, 4
  br i1 %10, label %11, label %28

11:                                               ; preds = %2
  %12 = load i32, ptr %6, align 4, !tbaa !5
  %13 = and i32 %12, -16777216
  %14 = lshr i32 %13, 24
  %15 = load i32, ptr %6, align 4, !tbaa !5
  %16 = and i32 %15, 16711680
  %17 = lshr i32 %16, 8
  %18 = or i32 %14, %17
  %19 = load i32, ptr %6, align 4, !tbaa !5
  %20 = and i32 %19, 65280
  %21 = shl i32 %20, 8
  %22 = or i32 %18, %21
  %23 = load i32, ptr %6, align 4, !tbaa !5
  %24 = and i32 %23, 255
  %25 = shl i32 %24, 24
  %26 = or i32 %22, %25
  %27 = load ptr, ptr %5, align 8, !tbaa !9
  store i32 %26, ptr %27, align 4, !tbaa !5
  store i32 1, ptr %3, align 4
  store i32 1, ptr %7, align 4
  br label %29

28:                                               ; preds = %2
  store i32 0, ptr %3, align 4
  store i32 1, ptr %7, align 4
  br label %29

29:                                               ; preds = %28, %11
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #3
  %30 = load i32, ptr %3, align 4
  ret i32 %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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"any pointer", !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"

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nofree
declare noundef i64 @read(i32 noundef, ptr nocapture noundef, i64 noundef) local_unnamed_addr #1

; Function Attrs: nofree nounwind uwtable
define dso_local range(i32 0, 2) i32 @read_int4(i32 noundef %0, ptr nocapture noundef writeonly %1) local_unnamed_addr #2 {
  %3 = alloca i32, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %3) #4
  %4 = call i64 @read(i32 noundef %0, ptr noundef nonnull %3, i64 noundef 4) #4
  %5 = icmp eq i64 %4, 4
  br i1 %5, label %6, label %9

6:                                                ; preds = %2
  %7 = load i32, ptr %3, align 4, !tbaa !5
  %8 = tail call i32 @llvm.bswap.i32(i32 %7)
  store i32 %8, ptr %1, align 4, !tbaa !5
  br label %9

9:                                                ; preds = %2, %6
  %.0 = phi i32 [ 1, %6 ], [ 0, %2 ]
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %3) #4
  ret i32 %.0
}

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i32 @llvm.bswap.i32(i32) #3

attributes #0 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { nofree "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 = { 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 #3 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }
attributes #4 = { 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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}


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