; LLVM IR from NOAA-PMEL/Ferret :: fer/ccr (binaryRead)

; 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"

@Swap = external hidden global i32, align 4
@Permutes = external hidden global [7 x i32], align 16

; 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

; Function Attrs: nounwind uwtable
define dso_local void @br_set_atts_(ptr noundef %0, ptr noundef %1) #1 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  store ptr %1, ptr %4, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #2
  store i32 0, ptr %5, align 4, !tbaa !9
  br label %6

6:                                                ; preds = %19, %2
  %7 = load i32, ptr %5, align 4, !tbaa !9
  %8 = icmp slt i32 %7, 7
  br i1 %8, label %9, label %22

9:                                                ; preds = %6
  %10 = load ptr, ptr %3, align 8, !tbaa !5
  %11 = load i32, ptr %5, align 4, !tbaa !9
  %12 = sext i32 %11 to i64
  %13 = getelementptr inbounds i32, ptr %10, i64 %12
  %14 = load i32, ptr %13, align 4, !tbaa !9
  %15 = sub nsw i32 %14, 1
  %16 = load i32, ptr %5, align 4, !tbaa !9
  %17 = sext i32 %16 to i64
  %18 = getelementptr inbounds [7 x i32], ptr @Permutes, i64 0, i64 %17
  store i32 %15, ptr %18, align 4, !tbaa !9
  br label %19

19:                                               ; preds = %9
  %20 = load i32, ptr %5, align 4, !tbaa !9
  %21 = add nsw i32 %20, 1
  store i32 %21, ptr %5, align 4, !tbaa !9
  br label %6, !llvm.loop !11

22:                                               ; preds = %6
  %23 = load ptr, ptr %4, align 8, !tbaa !5
  %24 = load i32, ptr %23, align 4, !tbaa !9
  store i32 %24, ptr @Swap, align 4, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #2
  ret void
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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, !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 = !{!"int", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}


; 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"

@Swap = external hidden local_unnamed_addr global i32, align 4
@Permutes = external hidden local_unnamed_addr global [7 x i32], align 16

; Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(write, argmem: read, inaccessiblemem: none) uwtable
define dso_local void @br_set_atts_(ptr nocapture noundef readonly %0, ptr nocapture noundef readonly %1) local_unnamed_addr #0 {
  %3 = load <4 x i32>, ptr %0, align 4, !tbaa !5
  %4 = add nsw <4 x i32> %3, <i32 -1, i32 -1, i32 -1, i32 -1>
  store <4 x i32> %4, ptr @Permutes, align 16, !tbaa !5
  %5 = getelementptr inbounds i8, ptr %0, i64 16
  %6 = load <2 x i32>, ptr %5, align 4, !tbaa !5
  %7 = add nsw <2 x i32> %6, <i32 -1, i32 -1>
  store <2 x i32> %7, ptr getelementptr inbounds (i8, ptr @Permutes, i64 16), align 16, !tbaa !5
  %8 = getelementptr inbounds i8, ptr %0, i64 24
  %9 = load i32, ptr %8, align 4, !tbaa !5
  %10 = add nsw i32 %9, -1
  store i32 %10, ptr getelementptr inbounds (i8, ptr @Permutes, i64 24), align 8, !tbaa !5
  %11 = load i32, ptr %1, align 4, !tbaa !5
  store i32 %11, ptr @Swap, align 4, !tbaa !5
  ret void
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(write, argmem: read, inaccessiblemem: none) 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" }

!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,GVNPass,GlobalOptPass,IndVarSimplifyPass,InferAlignmentPass,InferFunctionAttrsPass,InstCombinePass,LoopRotatePass,PostOrderFunctionAttrsPass,SLPVectorizerPass,SROAPass,SimplifyCFGPass