C#•16mo ago

❔ LLVMSharp weird function

Hey, so I'm trynig to convert my class into a LLVM const. I have a class callled NumberAST:

class NumberAST
{
  public NumberType type = NumberType.Int64;
  public string value = "100000";
}

class NumberAST
{
  public NumberType type = NumberType.Int64;
  public string value = "100000";
}

And I was wondering how to convert it into llvm const. I found this thingy LLVMValueRef.CreateConstIntOfString() but I can't find it in the docs so i'm not sure how to use it

10 Replies

Theos•16mo ago

https://media.discordapp.net/attachments/1009146923191652483/1136998768391233566/image.png

Theos•16mo ago

 public static LLVMValueRef CreateConstIntOfString(LLVMTypeRef IntTy, string Text, byte Radix) => CreateConstIntOfString(IntTy, Text.AsSpan(), Radix);

    public static LLVMValueRef CreateConstIntOfString(LLVMTypeRef IntTy, ReadOnlySpan<char> Text, byte Radix)
    {
        using var marshaledText = new MarshaledString(Text);
        return LLVM.ConstIntOfString(IntTy, marshaledText, Radix);
    }

 public static LLVMValueRef CreateConstIntOfString(LLVMTypeRef IntTy, string Text, byte Radix) => CreateConstIntOfString(IntTy, Text.AsSpan(), Radix);

    public static LLVMValueRef CreateConstIntOfString(LLVMTypeRef IntTy, ReadOnlySpan<char> Text, byte Radix)
    {
        using var marshaledText = new MarshaledString(Text);
        return LLVM.ConstIntOfString(IntTy, marshaledText, Radix);
    }

thats the origin of this function

[DllImport("libLLVM", CallingConvention = CallingConvention.Cdecl, EntryPoint = "LLVMConstIntOfString", ExactSpelling = true)]
    [return: NativeTypeName("LLVMValueRef")]
    public static extern LLVMOpaqueValue* ConstIntOfString([NativeTypeName("LLVMTypeRef")] LLVMOpaqueType* IntTy, [NativeTypeName("const char *")] sbyte* Text, [NativeTypeName("uint8_t")] byte Radix);

[DllImport("libLLVM", CallingConvention = CallingConvention.Cdecl, EntryPoint = "LLVMConstIntOfString", ExactSpelling = true)]
    [return: NativeTypeName("LLVMValueRef")]
    public static extern LLVMOpaqueValue* ConstIntOfString([NativeTypeName("LLVMTypeRef")] LLVMOpaqueType* IntTy, [NativeTypeName("const char *")] sbyte* Text, [NativeTypeName("uint8_t")] byte Radix);

any ideas if i'm even trying to use the right thing?

phaseshift•16mo ago

well you need to pass three arguments...

Accord•16mo ago

Looks like nothing has happened here. I will mark this as stale and this post will be archived until there is new activity.

Theos•16mo ago

really? I had no idea. That's now what I'm asking tho. I don't really understand whats the use case of this function what does it do whats the radix used for there's nothing in the documentation

phaseshift•16mo ago

Radix specifies how many numbers are possible for each digit. Eg for "100" is it binary? Hex? Decimal? Use the radix to specify 2, 16, or 10, respectively

Accord•16mo ago

Was this issue resolved? If so, run /close - otherwise I will mark this as stale and this post will be archived until there is new activity.

Theos•16mo ago

Thanks! so I guess I can do something like CreateConstIntOfString(LLVMTypeRef.Int64, "1054594", 10) and it should parse my string into Int64

phaseshift•16mo ago

yes

Accord•16mo ago

Was this issue resolved? If so, run /close - otherwise I will mark this as stale and this post will be archived until there is new activity.

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❔ LLVMSharp weird function