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re PR tree-optimization/79007 (gcc.dg/tree-ssa/dse-points-to.c fails starting with r244067)

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PR tree-optimization/79007
	PR tree-optimization/67955
	* tree-ssa-alias.c (same_addr_size_stores_p): Only need to be
	conservative for pt.null when flag_non_call_exceptions is on.

From-SVN: r244247
This commit is contained in:
Jeff Law 2017-01-09 14:53:02 -07:00 committed by Jeff Law
parent f4da28a0ab
commit b5acc7a1be
2 changed files with 10 additions and 3 deletions
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7
gcc/ChangeLog
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@ -1,3 +1,10 @@
2017-01-04 Jeff Law <law@redhat.com>
PR tree-optimization/79007
PR tree-optimization/67955
* tree-ssa-alias.c (same_addr_size_stores_p): Only need to be
conservative for pt.null when flag_non_call_exceptions is on.
2017-01-09 Jakub Jelinek <jakub@redhat.com>
PR translation/79019

6
gcc/tree-ssa-alias.c
View File

@ -2373,9 +2373,9 @@ same_addr_size_stores_p (tree base1, HOST_WIDE_INT offset1, HOST_WIDE_INT size1,
|| !pt_solution_singleton_or_null_p (&pi->pt, &pt_uid))
return false;
/* If the solution has a singleton and NULL, then we can not
be sure that the two stores hit the same address. */
if (pi->pt.null)
/* Be conservative with non-call exceptions when the address might
be NULL. */
if (flag_non_call_exceptions && pi->pt.null)
return false;
/* Check that ptr points relative to obj. */