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re PR bootstrap/90873 (-Wmaybe-uninitialized warning in gcc/tree-ssa-forwprop.c breaks 32-bit bootstrap)

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PR bootstrap/90873
	* tree-ssa-alias.c (indirect_ref_may_alias_decl_p): Also check that
	dbase is not TARGET_MEM_REF.

From-SVN: r272273
This commit is contained in:
Jan Hubicka 2019-06-13 23:56:37 +02:00 committed by Jan Hubicka
parent d7a290758b
commit a873b76f0e
2 changed files with 9 additions and 1 deletions
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gcc/ChangeLog
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@ -1,3 +1,9 @@
2019-06-13 Jan Hubicka <hubicka@ucw.cz>
PR bootstrap/90873
* tree-ssa-alias.c (indirect_ref_may_alias_decl_p): Also check that
dbase is not TARGET_MEM_REF.
2019-06-13 Uroš Bizjak <ubizjak@gmail.com>
* config/i386/i386.md (SWIM1248s): Rename from SWIM1248x.

4
gcc/tree-ssa-alias.c
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@ -1393,8 +1393,10 @@ indirect_ref_may_alias_decl_p (tree ref1 ATTRIBUTE_UNUSED, tree base1,
But avoid treating variable length arrays as "objects", instead assume they
can overlap by an exact multiple of their element size.
See gcc.dg/torture/alias-2.c. */
if ((TREE_CODE (base1) != TARGET_MEM_REF
if (((TREE_CODE (base1) != TARGET_MEM_REF
|| (!TMR_INDEX (base1) && !TMR_INDEX2 (base1)))
&& (TREE_CODE (dbase2) != TARGET_MEM_REF
|| (!TMR_INDEX (dbase2) && !TMR_INDEX2 (base2))))
&& same_type_for_tbaa (TREE_TYPE (base1), TREE_TYPE (dbase2)) == 1
&& (TREE_CODE (TREE_TYPE (base1)) != ARRAY_TYPE
|| (TYPE_SIZE (TREE_TYPE (base1))