; 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: nounwind uwtable
define dso_local ptr @pos(ptr noundef %0) #0 {
  %2 = alloca ptr, align 8
  store ptr %0, ptr %2, align 8, !tbaa !5
  br label %3

3:                                                ; preds = %9, %1
  %4 = load ptr, ptr %2, align 8, !tbaa !5
  %5 = getelementptr inbounds i8, ptr %4, i32 1
  store ptr %5, ptr %2, align 8, !tbaa !5
  %6 = load i8, ptr %4, align 1, !tbaa !9
  %7 = sext i8 %6 to i32
  %8 = icmp ne i32 %7, 61
  br i1 %8, label %9, label %10

9:                                                ; preds = %3
  br label %3, !llvm.loop !10

10:                                               ; preds = %3
  br label %11

11:                                               ; preds = %17, %10
  %12 = load ptr, ptr %2, align 8, !tbaa !5
  %13 = getelementptr inbounds i8, ptr %12, i32 1
  store ptr %13, ptr %2, align 8, !tbaa !5
  %14 = load i8, ptr %12, align 1, !tbaa !9
  %15 = sext i8 %14 to i32
  %16 = icmp eq i32 %15, 32
  br i1 %16, label %17, label %18

17:                                               ; preds = %11
  br label %11, !llvm.loop !12

18:                                               ; preds = %11
  %19 = load ptr, ptr %2, align 8, !tbaa !5
  %20 = getelementptr inbounds i8, ptr %19, i64 -1
  ret ptr %20
}

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" }

!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 = !{!7, !7, i64 0}
!10 = distinct !{!10, !11}
!11 = !{!"llvm.loop.mustprogress"}
!12 = distinct !{!12, !11}


; 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(read, inaccessiblemem: none) uwtable
define dso_local noundef nonnull ptr @pos(ptr noundef readonly %0) local_unnamed_addr #0 {
  br label %2

2:                                                ; preds = %2, %1
  %.0 = phi ptr [ %0, %1 ], [ %3, %2 ]
  %3 = getelementptr inbounds i8, ptr %.0, i64 1
  %4 = load i8, ptr %.0, align 1, !tbaa !5
  %.not = icmp eq i8 %4, 61
  br i1 %.not, label %.preheader, label %2, !llvm.loop !8

.preheader:                                       ; preds = %2, %.preheader
  %.1 = phi ptr [ %5, %.preheader ], [ %3, %2 ]
  %5 = getelementptr inbounds i8, ptr %.1, i64 1
  %6 = load i8, ptr %.1, align 1, !tbaa !5
  %7 = icmp eq i8 %6, 32
  br i1 %7, label %.preheader, label %8, !llvm.loop !10

8:                                                ; preds = %.preheader
  ret ptr %.1
}

attributes #0 = { nofree norecurse nosync nounwind memory(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 = !{!"omnipotent char", !7, i64 0}
!7 = !{!"Simple C/C++ TBAA"}
!8 = distinct !{!8, !9}
!9 = !{!"llvm.loop.mustprogress"}
!10 = distinct !{!10, !9}


; Effective O3 passes: GVNPass,GlobalOptPass,InstCombinePass,InstSimplifyPass,LCSSAPass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass