03e6f40cdb
The alignment attribute in the 'alloca' op treats the '0' value as 'unset'. When parsing the custom form of the 'alloca' op, ignore the alignment attribute with if its value is '0' instead of actually creating it and producing a slightly different textually yet equivalent semantically form in the output. Reviewed By: rriddle Differential Revision: https://reviews.llvm.org/D90179