https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70828
Bug ID: 70828
Summary: broken array-type subarrays inside acc data in openacc
Product: gcc
Version: 6.1.0
Status: UNCONFIRMED
Keywords: openacc
Severity: normal
Priority: P3
Component: middle-end
Assignee: cesar at gcc dot gnu.org
Reporter: cesar at gcc dot gnu.org
CC: tschwinge at gcc dot gnu.org
Target Milestone: ---
Created attachment 38351
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38351&action=edit
broken subarray
Given an array-typed subarray with a non-zero base element on an acc data
construct, the gimplifier will implicitly add a pcopy clause for any parallel
and kernels construct which uses that array. The pcopy is correct, but this
pcopy expects the entire array to be present on the accelerator. This
ultimately results in a runtime failure when the base of the subarray is not
element zero.
This problem can be reproduced with the attached test case in trunk and gcc-6.
