commit 7057b8f8c2fbb7a2112705c2962d92b8ccef7c30
author Richard Sandiford <richard.sandiford@arm.com> Tue Nov 30 17:32:36 2021 +0000
committer Richard Sandiford <richard.sandiford@arm.com> Tue Nov 30 17:32:36 2021 +0000
tree 8639c3dded9f49f35ab43d79830f18784466c82d
parent 5fee5ec362f7a243f459e6378fd49dfc89dc9fb5

vect: Fix ncopies calculation for emulated gather/scatter [PR103494]

I was too eager about removing ncopies calculations in g:10833849b55.
When emulating gather/scatter, the offset ncopies can be different from
the data ncopies.  This patch restores the original calculation.

gcc/
	PR tree-optimization/103494
	* tree-vect-stmts.c (vect_get_gather_scatter_ops): Remove ncopies
	argument and calculate ncopies from gs_info->offset_vectype
	where necessary.
	(vectorizable_store, vectorizable_load): Update accordingly.

gcc/testsuite/
	PR tree-optimization/103494
	* gcc.dg/vect/pr103494.c: New test.
	* g++.dg/vect/pr103494.cc: Likewise.