; LLVM IR from trustwallet/wallet-core :: trezor-crypto/crypto (bignum)

; 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"

%struct.bignum256 = type { [9 x i32] }

; 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 @bn_read_uint64(i64 noundef %0, ptr noundef %1) #1 {
  %3 = alloca i64, align 8
  %4 = alloca ptr, align 8
  %5 = alloca i32, align 4
  store i64 %0, ptr %3, align 8, !tbaa !5
  store ptr %1, ptr %4, align 8, !tbaa !9
  %6 = load i64, ptr %3, align 8, !tbaa !5
  %7 = and i64 %6, 536870911
  %8 = trunc i64 %7 to i32
  %9 = load ptr, ptr %4, align 8, !tbaa !9
  %10 = getelementptr inbounds %struct.bignum256, ptr %9, i32 0, i32 0
  %11 = getelementptr inbounds [9 x i32], ptr %10, i64 0, i64 0
  store i32 %8, ptr %11, align 4, !tbaa !11
  %12 = load i64, ptr %3, align 8, !tbaa !5
  %13 = lshr i64 %12, 29
  store i64 %13, ptr %3, align 8, !tbaa !5
  %14 = and i64 %13, 536870911
  %15 = trunc i64 %14 to i32
  %16 = load ptr, ptr %4, align 8, !tbaa !9
  %17 = getelementptr inbounds %struct.bignum256, ptr %16, i32 0, i32 0
  %18 = getelementptr inbounds [9 x i32], ptr %17, i64 0, i64 1
  store i32 %15, ptr %18, align 4, !tbaa !11
  %19 = load i64, ptr %3, align 8, !tbaa !5
  %20 = lshr i64 %19, 29
  %21 = trunc i64 %20 to i32
  %22 = load ptr, ptr %4, align 8, !tbaa !9
  %23 = getelementptr inbounds %struct.bignum256, ptr %22, i32 0, i32 0
  %24 = getelementptr inbounds [9 x i32], ptr %23, i64 0, i64 2
  store i32 %21, ptr %24, align 4, !tbaa !11
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #2
  store i32 3, ptr %5, align 4, !tbaa !11
  br label %25

25:                                               ; preds = %35, %2
  %26 = load i32, ptr %5, align 4, !tbaa !11
  %27 = icmp ult i32 %26, 9
  br i1 %27, label %29, label %28

28:                                               ; preds = %25
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #2
  br label %38

29:                                               ; preds = %25
  %30 = load ptr, ptr %4, align 8, !tbaa !9
  %31 = getelementptr inbounds %struct.bignum256, ptr %30, i32 0, i32 0
  %32 = load i32, ptr %5, align 4, !tbaa !11
  %33 = zext i32 %32 to i64
  %34 = getelementptr inbounds [9 x i32], ptr %31, i64 0, i64 %33
  store i32 0, ptr %34, align 4, !tbaa !11
  br label %35

35:                                               ; preds = %29
  %36 = load i32, ptr %5, align 4, !tbaa !11
  %37 = add i32 %36, 1
  store i32 %37, ptr %5, align 4, !tbaa !11
  br label %25, !llvm.loop !13

38:                                               ; preds = %28
  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 = !{!"long", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"any pointer", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"int", !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: mustprogress nofree norecurse nosync nounwind willreturn memory(argmem: write) uwtable
define dso_local void @bn_read_uint64(i64 noundef %0, ptr nocapture noundef writeonly %1) local_unnamed_addr #0 {
  %3 = trunc i64 %0 to i32
  %4 = and i32 %3, 536870911
  store i32 %4, ptr %1, align 4, !tbaa !5
  %5 = lshr i64 %0, 29
  %6 = trunc i64 %5 to i32
  %7 = and i32 %6, 536870911
  %8 = getelementptr inbounds i8, ptr %1, i64 4
  store i32 %7, ptr %8, align 4, !tbaa !5
  %9 = lshr i64 %0, 58
  %10 = trunc nuw nsw i64 %9 to i32
  %11 = getelementptr inbounds i8, ptr %1, i64 8
  store i32 %10, ptr %11, align 4, !tbaa !5
  %scevgep = getelementptr i8, ptr %1, i64 12
  tail call void @llvm.memset.p0.i64(ptr noundef nonnull align 4 dereferenceable(24) %scevgep, i8 0, i64 24, i1 false), !tbaa !5
  ret void
}

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

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(argmem: write) 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 = { nocallback nofree nounwind willreturn memory(argmem: write) }

!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,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,LoopIdiomRecognizePass,LoopRotatePass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass