r267654 - in /trunk/gcc: ChangeLog tree-vect-st...

[rsandifo@gcc.gnu.org]

Author: rsandifo
Date: Mon Jan  7 18:53:44 2019
New Revision: 267654

URL: https://gcc.gnu.org/viewcvs?rev=267654&root=gcc&view=rev
Log:
Fix IFN_MASK_STORE handling of IFN_GOMP_SIMD_LANE

The IFN_GOMP_SIMD_LANE handling in vectorizable_store tries to use MEM_REF
offsets to maintain pointer disambiguation info.  This patch makes sure
that we don't try to do the same optimisation for IFN_MASK_STOREs, which
have no similar offset argument.

The patch fixes libgomp.c-c++-common/pr66199-*.c for SVE.  Previously
we had an ncopies==2 store and stored both halves to the same address.

2019-01-07  Richard Sandiford  <richard.sandiford@arm.com>

gcc/
	* tree-vect-stmts.c (vectorizable_store): Don't use the dataref_offset
	optimization for masked stores.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/tree-vect-stmts.c