Re: [PATCH] rs6000: Adjust mov optabs for opaque modes [PR103353]

["Kewen.Lin" <linkw@linux.ibm.com>]

on 2022/4/2 5:52 AM, Peter Bergner wrote:
> On 4/1/22 3:50 PM, will schmidt wrote:
>> Is there a testcase, new or existing, that illustrates this error path?
> 
> Well, the already existsing test case pr101849.c is where the issue was seen,
> but only when compiled by hand outside of the test harness and using only the
> -maltivec option and not the -mcpu=power10 that the test case uses.
> 
> That said, I agree, pr101849.c should probably be copied into another test case
> file (pr103353.c) that uses options that trigger the issue so we can be sure the
> fix won't regress.
> 
> Peter
> 
> 

Thanks for the comments, Will and Peter!

I thought of adding one case before but gave up as the case still emits error messages
which can be fragile and are not test points and I didn't find any similar test cases
for similar scenarios in powerpc test suite.  Your suggestions make me consider it
seriously again.  The patch v2 was just posted with one test case:

  https://gcc.gnu.org/pipermail/gcc-patches/2022-April/592916.html.

Hope it looks better to you, thanks again!

BR,
Kewen