; LLVM IR from oswald2/AURIS :: esa-space-protocols/src/csrc (CLTUcsrc)

; 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"

@m_sregVal = external hidden global [128 x [256 x i8]], 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 zeroext i8 @check(ptr noundef %0, i16 noundef signext %1) #1 {
  %3 = alloca ptr, align 8
  %4 = alloca i16, align 2
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  store i16 %1, ptr %4, align 2, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #2
  store i32 0, ptr %5, align 4, !tbaa !11
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #2
  store i32 0, ptr %6, align 4, !tbaa !11
  br label %8

8:                                                ; preds = %29, %2
  %9 = load i32, ptr %6, align 4, !tbaa !11
  %10 = load i16, ptr %4, align 2, !tbaa !9
  %11 = sext i16 %10 to i32
  %12 = icmp slt i32 %9, %11
  br i1 %12, label %14, label %13

13:                                               ; preds = %8
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #2
  br label %32

14:                                               ; preds = %8
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #2
  %15 = load ptr, ptr %3, align 8, !tbaa !5
  %16 = load i32, ptr %6, align 4, !tbaa !11
  %17 = sext i32 %16 to i64
  %18 = getelementptr inbounds i8, ptr %15, i64 %17
  %19 = load i8, ptr %18, align 1, !tbaa !13
  %20 = zext i8 %19 to i32
  store i32 %20, ptr %7, align 4, !tbaa !11
  %21 = load i32, ptr %5, align 4, !tbaa !11
  %22 = sext i32 %21 to i64
  %23 = getelementptr inbounds [128 x [256 x i8]], ptr @m_sregVal, i64 0, i64 %22
  %24 = load i32, ptr %7, align 4, !tbaa !11
  %25 = sext i32 %24 to i64
  %26 = getelementptr inbounds [256 x i8], ptr %23, i64 0, i64 %25
  %27 = load i8, ptr %26, align 1, !tbaa !13
  %28 = zext i8 %27 to i32
  store i32 %28, ptr %5, align 4, !tbaa !11
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #2
  br label %29

29:                                               ; preds = %14
  %30 = load i32, ptr %6, align 4, !tbaa !11
  %31 = add nsw i32 %30, 1
  store i32 %31, ptr %6, align 4, !tbaa !11
  br label %8, !llvm.loop !14

32:                                               ; preds = %13
  %33 = load i32, ptr %5, align 4, !tbaa !11
  %34 = xor i32 %33, 255
  store i32 %34, ptr %5, align 4, !tbaa !11
  %35 = load i32, ptr %5, align 4, !tbaa !11
  %36 = shl i32 %35, 1
  store i32 %36, ptr %5, align 4, !tbaa !11
  %37 = load i32, ptr %5, align 4, !tbaa !11
  %38 = and i32 %37, 254
  %39 = trunc i32 %38 to i8
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #2
  ret i8 %39
}

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 = !{!"short", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"int", !7, i64 0}
!13 = !{!7, !7, i64 0}
!14 = distinct !{!14, !15}
!15 = !{!"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"

@m_sregVal = external hidden local_unnamed_addr global [128 x [256 x i8]], align 16

; Function Attrs: nofree norecurse nosync nounwind memory(read, inaccessiblemem: none) uwtable
define dso_local zeroext range(i8 0, -1) i8 @check(ptr nocapture noundef readonly %0, i16 noundef signext %1) local_unnamed_addr #0 {
  %3 = icmp sgt i16 %1, 0
  br i1 %3, label %.lr.ph.preheader, label %._crit_edge

.lr.ph.preheader:                                 ; preds = %2
  %wide.trip.count = zext nneg i16 %1 to i64
  %xtraiter = and i64 %wide.trip.count, 3
  %4 = icmp ult i16 %1, 4
  br i1 %4, label %._crit_edge.loopexit.unr-lcssa, label %.lr.ph.preheader.new

.lr.ph.preheader.new:                             ; preds = %.lr.ph.preheader
  %unroll_iter = and i64 %wide.trip.count, 32764
  br label %.lr.ph

._crit_edge.loopexit.unr-lcssa:                   ; preds = %.lr.ph, %.lr.ph.preheader
  %.lcssa.ph = phi i8 [ poison, %.lr.ph.preheader ], [ %35, %.lr.ph ]
  %indvars.iv.unr = phi i64 [ 0, %.lr.ph.preheader ], [ %indvars.iv.next.3, %.lr.ph ]
  %.011.unr = phi i64 [ 0, %.lr.ph.preheader ], [ %36, %.lr.ph ]
  %lcmp.mod.not = icmp eq i64 %xtraiter, 0
  br i1 %lcmp.mod.not, label %._crit_edge.loopexit, label %.lr.ph.epil

.lr.ph.epil:                                      ; preds = %._crit_edge.loopexit.unr-lcssa, %.lr.ph.epil
  %indvars.iv.epil = phi i64 [ %indvars.iv.next.epil, %.lr.ph.epil ], [ %indvars.iv.unr, %._crit_edge.loopexit.unr-lcssa ]
  %.011.epil = phi i64 [ %10, %.lr.ph.epil ], [ %.011.unr, %._crit_edge.loopexit.unr-lcssa ]
  %epil.iter = phi i64 [ %epil.iter.next, %.lr.ph.epil ], [ 0, %._crit_edge.loopexit.unr-lcssa ]
  %5 = getelementptr inbounds i8, ptr %0, i64 %indvars.iv.epil
  %6 = load i8, ptr %5, align 1, !tbaa !5
  %7 = zext i8 %6 to i64
  %8 = getelementptr inbounds [128 x [256 x i8]], ptr @m_sregVal, i64 0, i64 %.011.epil, i64 %7
  %9 = load i8, ptr %8, align 1, !tbaa !5
  %10 = zext i8 %9 to i64
  %indvars.iv.next.epil = add nuw nsw i64 %indvars.iv.epil, 1
  %epil.iter.next = add i64 %epil.iter, 1
  %epil.iter.cmp.not = icmp eq i64 %epil.iter.next, %xtraiter
  br i1 %epil.iter.cmp.not, label %._crit_edge.loopexit, label %.lr.ph.epil, !llvm.loop !8

._crit_edge.loopexit:                             ; preds = %.lr.ph.epil, %._crit_edge.loopexit.unr-lcssa
  %.lcssa = phi i8 [ %.lcssa.ph, %._crit_edge.loopexit.unr-lcssa ], [ %9, %.lr.ph.epil ]
  %11 = xor i8 %.lcssa, -1
  %12 = shl i8 %11, 1
  br label %._crit_edge

._crit_edge:                                      ; preds = %._crit_edge.loopexit, %2
  %.0.lcssa = phi i8 [ -2, %2 ], [ %12, %._crit_edge.loopexit ]
  ret i8 %.0.lcssa

.lr.ph:                                           ; preds = %.lr.ph, %.lr.ph.preheader.new
  %indvars.iv = phi i64 [ 0, %.lr.ph.preheader.new ], [ %indvars.iv.next.3, %.lr.ph ]
  %.011 = phi i64 [ 0, %.lr.ph.preheader.new ], [ %36, %.lr.ph ]
  %niter = phi i64 [ 0, %.lr.ph.preheader.new ], [ %niter.next.3, %.lr.ph ]
  %13 = getelementptr inbounds i8, ptr %0, i64 %indvars.iv
  %14 = load i8, ptr %13, align 1, !tbaa !5
  %15 = zext i8 %14 to i64
  %16 = getelementptr inbounds [128 x [256 x i8]], ptr @m_sregVal, i64 0, i64 %.011, i64 %15
  %17 = load i8, ptr %16, align 1, !tbaa !5
  %18 = zext i8 %17 to i64
  %indvars.iv.next = or disjoint i64 %indvars.iv, 1
  %19 = getelementptr inbounds i8, ptr %0, i64 %indvars.iv.next
  %20 = load i8, ptr %19, align 1, !tbaa !5
  %21 = zext i8 %20 to i64
  %22 = getelementptr inbounds [128 x [256 x i8]], ptr @m_sregVal, i64 0, i64 %18, i64 %21
  %23 = load i8, ptr %22, align 1, !tbaa !5
  %24 = zext i8 %23 to i64
  %indvars.iv.next.1 = or disjoint i64 %indvars.iv, 2
  %25 = getelementptr inbounds i8, ptr %0, i64 %indvars.iv.next.1
  %26 = load i8, ptr %25, align 1, !tbaa !5
  %27 = zext i8 %26 to i64
  %28 = getelementptr inbounds [128 x [256 x i8]], ptr @m_sregVal, i64 0, i64 %24, i64 %27
  %29 = load i8, ptr %28, align 1, !tbaa !5
  %30 = zext i8 %29 to i64
  %indvars.iv.next.2 = or disjoint i64 %indvars.iv, 3
  %31 = getelementptr inbounds i8, ptr %0, i64 %indvars.iv.next.2
  %32 = load i8, ptr %31, align 1, !tbaa !5
  %33 = zext i8 %32 to i64
  %34 = getelementptr inbounds [128 x [256 x i8]], ptr @m_sregVal, i64 0, i64 %30, i64 %33
  %35 = load i8, ptr %34, align 1, !tbaa !5
  %36 = zext i8 %35 to i64
  %indvars.iv.next.3 = add nuw nsw i64 %indvars.iv, 4
  %niter.next.3 = add i64 %niter, 4
  %niter.ncmp.3 = icmp eq i64 %niter.next.3, %unroll_iter
  br i1 %niter.ncmp.3, label %._crit_edge.loopexit.unr-lcssa, label %.lr.ph, !llvm.loop !10
}

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.unroll.disable"}
!10 = distinct !{!10, !11}
!11 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: GVNPass,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,LCSSAPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass