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Re: Patch RFA: Add option -fcollectible-pointers, use it in ivopts

Updated patch.

I've verified that I'm changing the only relevant place in
tree-ssa-loop-ivopts.c that creates a POINTER_PLUS_EXPR, so I do think
that this is the only changed to fix the problem for ivopts.

OK for mainline?

Ian

gcc/ChangeLog:

2016-01-22  Ian Lance Taylor  <iant@google.com>

* common.opt (fkeep-gc-roots-live): New option.
* tree-ssa-loop-ivopts.c (add_autoinc_candidates): If
-fkeep-gc-roots-live, skip pointers.
* doc/invoke.texi (Optimize Options): Document
-fkeep-gc-roots-live.

gcc/testsuite/ChangeLog:

2016-01-22  Ian Lance Taylor  <iant@google.com>

* gcc.dg/tree-ssa/ivopt_5.c: New test.

Attachment: patch.txt
Description: Text document

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