; 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] }

@.str.1 = external hidden unnamed_addr constant [87 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [32 x i8], align 1
@__PRETTY_FUNCTION__.bn_clearbit = external hidden unnamed_addr constant [40 x i8], align 1

; Function Attrs: noreturn nounwind
declare void @__assert_fail(ptr noundef, ptr noundef, i32 noundef, ptr noundef) #0

; Function Attrs: nounwind uwtable
define dso_local void @bn_clearbit(ptr noundef %0, i16 noundef zeroext %1) #1 {
  %3 = alloca ptr, align 8
  %4 = alloca i16, align 2
  store ptr %0, ptr %3, align 8, !tbaa !5
  store i16 %1, ptr %4, align 2, !tbaa !9
  %5 = load i16, ptr %4, align 2, !tbaa !9
  %6 = zext i16 %5 to i32
  %7 = icmp slt i32 %6, 261
  br i1 %7, label %8, label %9

8:                                                ; preds = %2
  br label %10

9:                                                ; preds = %2
  call void @__assert_fail(ptr noundef @.str.2, ptr noundef @.str.1, i32 noundef 407, ptr noundef @__PRETTY_FUNCTION__.bn_clearbit) #2
  unreachable

10:                                               ; preds = %8
  %11 = load i16, ptr %4, align 2, !tbaa !9
  %12 = zext i16 %11 to i32
  %13 = srem i32 %12, 29
  %14 = shl i32 1, %13
  %15 = xor i32 %14, -1
  %16 = load ptr, ptr %3, align 8, !tbaa !5
  %17 = getelementptr inbounds %struct.bignum256, ptr %16, i32 0, i32 0
  %18 = load i16, ptr %4, align 2, !tbaa !9
  %19 = zext i16 %18 to i32
  %20 = sdiv i32 %19, 29
  %21 = sext i32 %20 to i64
  %22 = getelementptr inbounds [9 x i32], ptr %17, i64 0, i64 %21
  %23 = load i32, ptr %22, align 4, !tbaa !11
  %24 = and i32 %23, %15
  store i32 %24, ptr %22, align 4, !tbaa !11
  ret void
}

attributes #0 = { noreturn nounwind "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" }
attributes #2 = { noreturn 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}


; 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"

@.str.1 = external hidden unnamed_addr constant [87 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [32 x i8], align 1
@__PRETTY_FUNCTION__.bn_clearbit = external hidden unnamed_addr constant [40 x i8], align 1

; Function Attrs: noreturn nounwind
declare void @__assert_fail(ptr noundef, ptr noundef, i32 noundef, ptr noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local void @bn_clearbit(ptr nocapture noundef %0, i16 noundef zeroext %1) local_unnamed_addr #1 {
  %3 = icmp ult i16 %1, 261
  br i1 %3, label %5, label %4

4:                                                ; preds = %2
  tail call void @__assert_fail(ptr noundef nonnull @.str.2, ptr noundef nonnull @.str.1, i32 noundef 407, ptr noundef nonnull @__PRETTY_FUNCTION__.bn_clearbit) #2
  unreachable

5:                                                ; preds = %2
  %6 = urem i16 %1, 29
  %.zext = zext nneg i16 %6 to i32
  %7 = shl nuw nsw i32 1, %.zext
  %8 = xor i32 %7, -1
  %9 = udiv i16 %1, 29
  %10 = zext nneg i16 %9 to i64
  %11 = getelementptr inbounds [9 x i32], ptr %0, i64 0, i64 %10
  %12 = load i32, ptr %11, align 4, !tbaa !5
  %13 = and i32 %12, %8
  store i32 %13, ptr %11, align 4, !tbaa !5
  ret void
}

attributes #0 = { noreturn nounwind "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" }
attributes #2 = { noreturn 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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}


; Effective O3 passes: CorrelatedValuePropagationPass,EarlyCSEPass,GlobalOptPass,IPSCCPPass,InstCombinePass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass