llvm dev - Jan 2016 - error of using GATHER intrinsic

Got it. Thanks. I will try it with the trunk version.

On Wed, Jan 20, 2016 at 1:36 PM, Tim Northover <t.p.northover at
gmail.com>
wrote:
> Hi Zhi,
> On 20 January 2016 at 13:33, zhi chen <zchenhn at gmail.com> wrote:
> > Thanks for your response. The attached is the .bc file after my pass.
I
> > could generate the assembly with -mcpu=skx but not with
-mcpu=core-avx2.
> > Could you please take a look? BTW, I am using LLVM-3.7.
>
> It seems to compile fine on trunk, so it looks like someone has
> already fixed the bug.
>
> Tim.
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
<http://lists.llvm.org/pipermail/llvm-dev/attachments/20160120/50229eef/attachment.html>

Hi Tim,

I got the following error when I used llc -O3 -mcpu=skx to generate the
assembly for the attached bitcode:

llc:
/home/zhi/tools/llvm_3.7/llvm-3.7.1.src/lib/Target/X86/X86ISelLowering.cpp:13472:
llvm::SDValue LowerIntVSETCC_AVX512(llvm::SDValue, llvm::SelectionDAG&,
const llvm::X86Subtarget*): Assertion
`Op0.getValueType().getVectorElementType().getSizeInBits() >= 8 &&
Op.getValueType().getScalarType() == MVT::i1 && "Cannot set masked
compare
for this operation"' failed.

Is it also a bug or do I miss something for avx-512 comparison?

Best,
Zhi

On Wed, Jan 20, 2016 at 1:39 PM, zhi chen <zchenhn at gmail.com> wrote:
> Got it. Thanks. I will try it with the trunk version.
>
> On Wed, Jan 20, 2016 at 1:36 PM, Tim Northover <t.p.northover at
gmail.com>
> wrote:
>
>> Hi Zhi,
>> On 20 January 2016 at 13:33, zhi chen <zchenhn at gmail.com>
wrote:
>> > Thanks for your response. The attached is the .bc file after my
pass. I
>> > could generate the assembly with -mcpu=skx but not with
-mcpu=core-avx2.
>> > Could you please take a look? BTW, I am using LLVM-3.7.
>>
>> It seems to compile fine on trunk, so it looks like someone has
>> already fixed the bug.
>>
>> Tim.
>>
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
<http://lists.llvm.org/pipermail/llvm-dev/attachments/20160120/dd1d65f0/attachment.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: ao_opt.bc
Type: application/octet-stream
Size: 33460 bytes
Desc: not available
URL:
<http://lists.llvm.org/pipermail/llvm-dev/attachments/20160120/dd1d65f0/attachment.obj>

On 20 January 2016 at 15:46, zhi chen <zchenhn at gmail.com>
wrote:
> Is it also a bug or do I miss something for avx-512 comparison?
It's almost certainly a bug in LLVM, though it's difficult to be sure
with such a big .bc file. Your best bet is to reduce it down to the
smallest .bc file you can and report a bug.

Cheers.

Tim.