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r278099 - in /trunk/gcc: ChangeLog targhooks.c ...

From: msebor at gcc dot gnu dot org
To: gcc-cvs at gcc dot gnu dot org
Date: Tue, 12 Nov 2019 18:49:31 -0000
Subject: r278099 - in /trunk/gcc: ChangeLog targhooks.c ...

Author: msebor
Date: Tue Nov 12 18:49:31 2019
New Revision: 278099

URL: https://gcc.gnu.org/viewcvs?rev=278099&root=gcc&view=rev
Log:
PR tree-optimization/92412 - excessive errno aliasing assumption defeats optimization

gcc/ChangeLog:

	PR tree-optimization/92412
	* targhooks.c (default_ref_may_alias_errno): Errono can only alias
	extern variables.

gcc/testsuite/ChangeLog:

	PR tree-optimization/92412
	* gcc.dg/strlenopt-91.c: New test.


Added:
    trunk/gcc/testsuite/gcc.dg/strlenopt-91.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/targhooks.c
    trunk/gcc/testsuite/ChangeLog

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