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| author | Richard Biener <rguenther@suse.de> | 2018-11-20 09:31:06 +0000 |
|---|---|---|
| committer | Richard Biener <rguenth@gcc.gnu.org> | 2018-11-20 09:31:06 +0000 |
| commit | dc3221e1e3d3a39d88d2d35103f6f50e3400d7a8 (patch) | |
| tree | da4944c9019f08cbd4e0f94ce31956af82630d92 /gcc/alias.c | |
| parent | 643427d70f7a547a1db8a8492a6a124ff22c0d3a (diff) | |
| download | gcc-dc3221e1e3d3a39d88d2d35103f6f50e3400d7a8.zip gcc-dc3221e1e3d3a39d88d2d35103f6f50e3400d7a8.tar.gz gcc-dc3221e1e3d3a39d88d2d35103f6f50e3400d7a8.tar.bz2 | |
re PR middle-end/83215 (C++: struct with char-array assumed to alias with everything)
2018-11-20 Richard Biener <rguenther@suse.de>
PR middle-end/83215
* alias.c (component_uses_parent_alias_set_from): Remove
alias-set zero and TYPE_TYPELESS_STORAGE case both already
handled in other ways.
* g++.dg/tree-ssa/pr83215.C: New testcase.
From-SVN: r266305
Diffstat (limited to 'gcc/alias.c')
| -rw-r--r-- | gcc/alias.c | 10 |
1 files changed, 1 insertions, 9 deletions
diff --git a/gcc/alias.c b/gcc/alias.c index 7963ece..835ac82 100644 --- a/gcc/alias.c +++ b/gcc/alias.c @@ -601,8 +601,7 @@ objects_must_conflict_p (tree t1, tree t2) /* Return the outermost parent of component present in the chain of component references handled by get_inner_reference in T with the following property: - - the component is non-addressable, or - - the parent has alias set zero, + - the component is non-addressable or NULL_TREE if no such parent exists. In the former cases, the alias set of this parent is the alias set that must be used for T itself. */ @@ -611,10 +610,6 @@ component_uses_parent_alias_set_from (const_tree t) { const_tree found = NULL_TREE; - if (AGGREGATE_TYPE_P (TREE_TYPE (t)) - && TYPE_TYPELESS_STORAGE (TREE_TYPE (t))) - return const_cast <tree> (t); - while (handled_component_p (t)) { switch (TREE_CODE (t)) @@ -652,9 +647,6 @@ component_uses_parent_alias_set_from (const_tree t) gcc_unreachable (); } - if (get_alias_set (TREE_TYPE (TREE_OPERAND (t, 0))) == 0) - found = t; - t = TREE_OPERAND (t, 0); } |