llvm dev - Jun 2009 - [LLVMdev] How to add a trivial LLVM intrinsic

Thank you for your reply--I've now done that.  Unfortunately, there's a
new
error now:

------------
Cannot yet select: intrinsic %llvm.test_intrinsic
test.c:25: internal compiler error: Aborted
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://developer.apple.com/bugreporter> for instructions.
------------

I've switched to using LLVM-2.5 instead of the latest SVN version, but I
made all the same changes described in the previous email.  After making the
changes, I built LLVM, and then built the GCC front end.

I traced the "Cannot yet select" print statement to
DAGISelEmitter.cpp, but
am unsure how to proceed.

Thanks again for your help,
Matt

-----Original Message-----
From: llvmdev-bounces at cs.uiuc.edu [mailto:llvmdev-bounces at cs.uiuc.edu] On
Behalf Of Duncan Sands
Sent: Wednesday, June 24, 2009 2:28 AM
To: LLVM Developers Mailing List
Subject: Re: [LLVMdev] How to add a trivial LLVM intrinsic

Hi,
> After invoking:
> llvm-gcc -g test.c -o test.native
> -----------------
> The compiler returns:
> cc1: Function.cpp:323: unsigned int llvm::Function::getIntrinsicID(bool)
> const: Assertion `noAssert && "Invalid LLVM intrinsic
name"' failed.
> test.c:24: internal compiler error: Aborted
did you rebuild llvm-gcc after building llvm with your new intrinsic
defined?

Ciao,

Duncan.
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Hi Matt,
> Thank you for your reply--I've now done that.  Unfortunately,
there's a new
> error now:
> 
> ------------
> Cannot yet select: intrinsic %llvm.test_intrinsic
> test.c:25: internal compiler error: Aborted
that's because you didn't tell the code generators what
they should do with your intrinsic.

Ciao,

Duncan.

Thank you again for your help.  Assuming my experimental "noop"
intrinsic is
intended to be target independent, what file should I modify to provide the
code generator with the necessary information?  I've already modified:

./lib/CodeGen/IntrinsicLowering.cpp
./lib/Target/CBackend/CBackend.cpp
./include/llvm/Intrinsics.td

Presumably it's not one of those?  Or, if it is, I imagine I've simply
screwed something up?

Thanks again,
Matt

-----Original Message-----
From: llvmdev-bounces at cs.uiuc.edu [mailto:llvmdev-bounces at cs.uiuc.edu] On
Behalf Of Duncan Sands
Sent: Wednesday, June 24, 2009 2:38 PM
To: LLVM Developers Mailing List
Subject: Re: [LLVMdev] How to add a trivial LLVM intrinsic

Hi Matt,
> Thank you for your reply--I've now done that.  Unfortunately,
there's a
new
> error now:
> 
> ------------
> Cannot yet select: intrinsic %llvm.test_intrinsic
> test.c:25: internal compiler error: Aborted
that's because you didn't tell the code generators what
they should do with your intrinsic.

Ciao,

Duncan.
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