[LLVMdev] Tablegen question

Villmow, Micah Micah.Villmow at amd.com
Wed Apr 15 10:16:00 PDT 2009

In IntrinsicEmitter::EmitTypeGenerate, called from
IntrinsicEmitter::EmitGenerator, here
for (unsigned j = 0; j != N; ++j) {
      OS << "    ArgTys.push_back(";
      EmitTypeGenerate(OS, ParamTys[j], ArgNo);
      OS << ");\n";
I'm hitting this assertion:
if (ArgType->isSubClassOf("LLVMMatchType")) {
    unsigned Number = ArgType->getValueAsInt("Number");
    assert(Number < ArgNo && "Invalid matching number!");

Where both Number and ArgNo are 1.

-----Original Message-----
From: llvmdev-bounces at cs.uiuc.edu [mailto:llvmdev-bounces at cs.uiuc.edu]
On Behalf Of Bob Wilson
Sent: Wednesday, April 15, 2009 9:53 AM
To: LLVM Developers Mailing List
Subject: Re: [LLVMdev] Tablegen question

On Apr 15, 2009, at 9:29 AM, Villmow, Micah wrote:

> I have this intrinsic definition for llvm.
> def int_opencl_math_fdistance_fast   : Intrinsic<[llvm_float_ty],
>                            [llvm_anyfloat_ty, LLVMMatchType<0>]>;
> Can someone explain  what LLVMMatchType does and how to specify it  
> to match the first argument and not the return value?
> I've tried LLVMMatchType<1> but it fails in IntrinsicEmitter.cpp

Can you give some more info about how LLVMMatchType<1> fails?  That  
should do what you want.
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