; LLVM IR from square/subzero :: core/external-crypto/aes (aesaux)

; 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

; Function Attrs: nounwind uwtable
define dso_local void @block_reverse(ptr noundef %0, i64 noundef %1) #1 {
  %3 = alloca ptr, align 8
  %4 = alloca i64, align 8
  %5 = alloca ptr, align 8
  %6 = alloca ptr, align 8
  %7 = alloca i8, align 1
  store ptr %0, ptr %3, align 8, !tbaa !5
  store i64 %1, ptr %4, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #2
  %8 = load ptr, ptr %3, align 8, !tbaa !5
  store ptr %8, ptr %5, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #2
  %9 = load ptr, ptr %3, align 8, !tbaa !5
  %10 = load i64, ptr %4, align 8, !tbaa !9
  %11 = getelementptr inbounds i8, ptr %9, i64 %10
  %12 = getelementptr inbounds i8, ptr %11, i64 -1
  store ptr %12, ptr %6, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 1, ptr %7) #2
  br label %13

13:                                               ; preds = %17, %2
  %14 = load ptr, ptr %5, align 8, !tbaa !5
  %15 = load ptr, ptr %6, align 8, !tbaa !5
  %16 = icmp ult ptr %14, %15
  br i1 %16, label %17, label %27

17:                                               ; preds = %13
  %18 = load ptr, ptr %5, align 8, !tbaa !5
  %19 = load i8, ptr %18, align 1, !tbaa !11
  store i8 %19, ptr %7, align 1, !tbaa !11
  %20 = load ptr, ptr %6, align 8, !tbaa !5
  %21 = load i8, ptr %20, align 1, !tbaa !11
  %22 = load ptr, ptr %5, align 8, !tbaa !5
  %23 = getelementptr inbounds i8, ptr %22, i32 1
  store ptr %23, ptr %5, align 8, !tbaa !5
  store i8 %21, ptr %22, align 1, !tbaa !11
  %24 = load i8, ptr %7, align 1, !tbaa !11
  %25 = load ptr, ptr %6, align 8, !tbaa !5
  %26 = getelementptr inbounds i8, ptr %25, i32 -1
  store ptr %26, ptr %6, align 8, !tbaa !5
  store i8 %24, ptr %25, align 1, !tbaa !11
  br label %13, !llvm.loop !12

27:                                               ; preds = %13
  call void @llvm.lifetime.end.p0(i64 1, ptr %7) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #2
  call void @llvm.lifetime.end.p0(i64 8, 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 = !{!"long", !7, i64 0}
!11 = !{!7, !7, i64 0}
!12 = distinct !{!12, !13}
!13 = !{!"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"

; Function Attrs: nofree norecurse nosync nounwind memory(readwrite, inaccessiblemem: none) uwtable
define dso_local void @block_reverse(ptr noundef %0, i64 noundef %1) local_unnamed_addr #0 {
  %3 = getelementptr inbounds i8, ptr %0, i64 %1
  %.0910 = getelementptr inbounds i8, ptr %3, i64 -1
  %4 = icmp ugt ptr %.0910, %0
  br i1 %4, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %2, %.lr.ph
  %.0912 = phi ptr [ %.09, %.lr.ph ], [ %.0910, %2 ]
  %.011 = phi ptr [ %7, %.lr.ph ], [ %0, %2 ]
  %5 = load i8, ptr %.011, align 1, !tbaa !5
  %6 = load i8, ptr %.0912, align 1, !tbaa !5
  %7 = getelementptr inbounds i8, ptr %.011, i64 1
  store i8 %6, ptr %.011, align 1, !tbaa !5
  store i8 %5, ptr %.0912, align 1, !tbaa !5
  %.09 = getelementptr inbounds i8, ptr %.0912, i64 -1
  %8 = icmp ult ptr %7, %.09
  br i1 %8, label %.lr.ph, label %._crit_edge, !llvm.loop !8

._crit_edge:                                      ; preds = %.lr.ph, %2
  ret void
}

attributes #0 = { nofree norecurse nosync nounwind memory(readwrite, 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 = !{!"omnipotent char", !7, i64 0}
!7 = !{!"Simple C/C++ TBAA"}
!8 = distinct !{!8, !9}
!9 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass