llvm dev - May 2013 - [LLVMdev] How should LLVM interpreter handle llvm.objectsize.i64

Hello LLVMer,

I use dragonegg to generate LLVM bitcode. Then I use LLVM interpreter to
execute what I get from compilation. However an error occurred and the
error
message is:
"LLVM ERROR: Code generator does not support intrinsic function
'llvm.objectsize.i64'!."
As far as I know, objectsize intrinsic is equivalent to gcc built-in
function
__builtin_object_size. But I don't call __builtin_object_size explicitly in
my
source code. Maybe headers what I include call the built-in somewhere. How
do
I eliminate such built-in function call in LLVM bitcode, or what code
should I
add into IntrinsicLowering.cpp to handle this problem.

Any suggestion or comment is welcomed.

Thanks
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My suggestion would be to always lower to "unknown". See the code in,
IIRC, codegenprepare (or fast-isel) that does this.

-eric

On Thu, May 9, 2013 at 7:03 AM, Issac Torvalds <lyh.kernel at gmail.com>
wrote:
> Hello LLVMer,
>
> I use dragonegg to generate LLVM bitcode. Then I use LLVM interpreter to
> execute what I get from compilation. However an error occurred and the
error
> message is:
> "LLVM ERROR: Code generator does not support intrinsic function
> 'llvm.objectsize.i64'!."
> As far as I know, objectsize intrinsic is equivalent to gcc built-in
> function
> __builtin_object_size. But I don't call __builtin_object_size
explicitly in
> my
> source code. Maybe headers what I include call the built-in somewhere. How
> do
> I eliminate such built-in function call in LLVM bitcode, or what code
should
> I
> add into IntrinsicLowering.cpp to handle this problem.
>
> Any suggestion or comment is welcomed.
>
> Thanks
>
>
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