[PATCH] Add offset_int to guard HOST_WIDE_INT overflow (PR tree-optimization/82042).

[Martin Liška]

Hi.

This is partial fix for the PR, where I calculate 2 offsets in offset_int type.

Patch can bootstrap on ppc64le-redhat-linux and survives regression tests.

Ready to be installed?
Martin

gcc/ChangeLog:

2017-09-20  Martin Liska  <mliska@suse.cz>

	PR tree-optimization/82042
	* alias.c (memrefs_conflict_p): Calculate offset in offset_int
	type.
	* cse.c (use_related_value): Likewise.
---
 gcc/alias.c | 10 ++++++++--
 gcc/cse.c   | 14 ++++++++++----
 2 files changed, 18 insertions(+), 6 deletions(-)


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