; LLVM IR from cryspen/libcrux :: sys/hacl/c/src (Hacl_Bignum4096)

; 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: nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #1

; Function Attrs: inlinehint nounwind uwtable
declare hidden i64 @__bswap_64(i64 noundef) #2

; Function Attrs: nounwind uwtable
define dso_local void @Hacl_Bignum4096_bn_to_bytes_be(ptr noundef %0, ptr noundef %1) #3 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca [512 x i8], align 16
  %6 = 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 512, ptr %5) #4
  call void @llvm.memset.p0.i64(ptr align 16 %5, i8 0, i64 512, i1 false)
  %7 = getelementptr inbounds [512 x i8], ptr %5, i64 0, i64 0
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #4
  store i32 0, ptr %6, align 4, !tbaa !9
  br label %8

8:                                                ; preds = %26, %2
  %9 = load i32, ptr %6, align 4, !tbaa !9
  %10 = icmp ult i32 %9, 64
  br i1 %10, label %12, label %11

11:                                               ; preds = %8
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #4
  br label %29

12:                                               ; preds = %8
  %13 = load ptr, ptr %4, align 8, !tbaa !5
  %14 = load i32, ptr %6, align 4, !tbaa !9
  %15 = mul i32 %14, 8
  %16 = zext i32 %15 to i64
  %17 = getelementptr inbounds i8, ptr %13, i64 %16
  %18 = load ptr, ptr %3, align 8, !tbaa !5
  %19 = load i32, ptr %6, align 4, !tbaa !9
  %20 = sub i32 64, %19
  %21 = sub i32 %20, 1
  %22 = zext i32 %21 to i64
  %23 = getelementptr inbounds i64, ptr %18, i64 %22
  %24 = load i64, ptr %23, align 8, !tbaa !11
  %25 = call i64 @__bswap_64(i64 noundef %24)
  call void @store64(ptr noundef %17, i64 noundef %25)
  br label %26

26:                                               ; preds = %12
  %27 = load i32, ptr %6, align 4, !tbaa !9
  %28 = add i32 %27, 1
  store i32 %28, ptr %6, align 4, !tbaa !9
  br label %8, !llvm.loop !13

29:                                               ; preds = %11
  call void @llvm.lifetime.end.p0(i64 512, ptr %5) #4
  ret void
}

; Function Attrs: inlinehint nounwind uwtable
declare hidden void @store64(ptr noundef, i64 noundef) #2

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { nocallback nofree nounwind willreturn memory(argmem: write) }
attributes #2 = { inlinehint 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 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 #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 = !{!"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 = !{!12, !12, i64 0}
!12 = !{!"long", !7, i64 0}
!13 = distinct !{!13, !14}
!14 = !{!"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: inlinehint nounwind uwtable
declare hidden i64 @__bswap_64(i64 noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local void @Hacl_Bignum4096_bn_to_bytes_be(ptr nocapture noundef readonly %0, ptr noundef %1) local_unnamed_addr #1 {
  br label %4

3:                                                ; preds = %4
  ret void

4:                                                ; preds = %2, %4
  %indvars.iv = phi i64 [ 0, %2 ], [ %indvars.iv.next, %4 ]
  %5 = shl nuw nsw i64 %indvars.iv, 3
  %6 = getelementptr inbounds i8, ptr %1, i64 %5
  %7 = sub nuw nsw i64 63, %indvars.iv
  %8 = getelementptr inbounds i64, ptr %0, i64 %7
  %9 = load i64, ptr %8, align 8, !tbaa !5
  %10 = tail call i64 @__bswap_64(i64 noundef %9)
  tail call void @store64(ptr noundef %6, i64 noundef %10)
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %exitcond.not = icmp eq i64 %indvars.iv.next, 64
  br i1 %exitcond.not, label %3, label %4, !llvm.loop !9
}

; Function Attrs: inlinehint nounwind uwtable
declare hidden void @store64(ptr noundef, i64 noundef) local_unnamed_addr #0

attributes #0 = { inlinehint 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 #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" }

!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 = !{!"long", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}


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