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Re: [RFC, vectorizer] Allow single element vector types for vector reduction operations

On September 12, 2017 6:25:32 PM GMT+02:00, Andreas Schwab <schwab@linux-m68k.org> wrote:
>On Sep 12 2017, Richard Biener <rguenther@suse.de> wrote:
>
>> Index: gcc/tree-vect-generic.c
>> ===================================================================
>> --- gcc/tree-vect-generic.c	(revision 251997)
>> +++ gcc/tree-vect-generic.c	(working copy)
>> @@ -1638,7 +1638,11 @@ expand_vector_operations_1 (gimple_stmt_
>>    /* The signedness is determined from input argument.  */
>>    if (code == VEC_UNPACK_FLOAT_HI_EXPR
>>        || code == VEC_UNPACK_FLOAT_LO_EXPR)
>> -    type = TREE_TYPE (rhs1);
>> +    {
>> +      type = TREE_TYPE (rhs1);
>> +      /* We do not know how to scalarize those.  */
>> +      return;
>
>The assignment is surely useless.

Sure. I left it because all this needs further cleanup. 

Richard. 

>Andreas.
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