diff options
| author | Jan Hubicka <hubicka@ucw.cz> | 2018-01-30 14:17:40 +0100 |
|---|---|---|
| committer | Jan Hubicka <hubicka@gcc.gnu.org> | 2018-01-30 13:17:40 +0000 |
| commit | 44c945e62c87d9e01156c9cd6da93f69b984be37 (patch) | |
| tree | 2454d2d5f9eefccf53c515d30f9b23f948f986f0 /gcc/lto | |
| parent | 6439c358063d3660e08a7931d720b901282879f8 (diff) | |
| download | gcc-44c945e62c87d9e01156c9cd6da93f69b984be37.zip gcc-44c945e62c87d9e01156c9cd6da93f69b984be37.tar.gz gcc-44c945e62c87d9e01156c9cd6da93f69b984be37.tar.bz2 | |
re PR lto/83954 (LTO: Bogus -Wlto-type-mismatch warning for array of pointer to incomplete type)
PR lto/83954
* lto-symtab.c (warn_type_compatibility_p): Silence false positive
for type match warning on arrays of pointers.
* gcc.dg/lto/pr83954.h: New testcase.
* gcc.dg/lto/pr83954_0.c: New testcase.
* gcc.dg/lto/pr83954_1.c: New testcase.
From-SVN: r257183
Diffstat (limited to 'gcc/lto')
| -rw-r--r-- | gcc/lto/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/lto/lto-symtab.c | 19 |
2 files changed, 21 insertions, 4 deletions
diff --git a/gcc/lto/ChangeLog b/gcc/lto/ChangeLog index 67679bc..7265b76 100644 --- a/gcc/lto/ChangeLog +++ b/gcc/lto/ChangeLog @@ -1,3 +1,9 @@ +2018-01-30 Jan Hubicka <hubicka@ucw.cz> + + PR lto/83954 + * lto-symtab.c (warn_type_compatibility_p): Silence false positive + for type match warning on arrays of pointers. + 2018-01-23 Martin Liska <mliska@suse.cz> PR lto/81440 diff --git a/gcc/lto/lto-symtab.c b/gcc/lto/lto-symtab.c index 0f0b958..0508c5e 100644 --- a/gcc/lto/lto-symtab.c +++ b/gcc/lto/lto-symtab.c @@ -284,11 +284,22 @@ warn_type_compatibility_p (tree prevailing_type, tree type, alias_set_type set1 = get_alias_set (type); alias_set_type set2 = get_alias_set (prevailing_type); - if (set1 && set2 && set1 != set2 - && (!POINTER_TYPE_P (type) || !POINTER_TYPE_P (prevailing_type) + if (set1 && set2 && set1 != set2) + { + tree t1 = type, t2 = prevailing_type; + + /* Alias sets of arrays are the same as alias sets of the inner + types. */ + while (TREE_CODE (t1) == ARRAY_TYPE && TREE_CODE (t2) == ARRAY_TYPE) + { + t1 = TREE_TYPE (t1); + t2 = TREE_TYPE (t2); + } + if ((!POINTER_TYPE_P (t1) || !POINTER_TYPE_P (t2)) || (set1 != TYPE_ALIAS_SET (ptr_type_node) - && set2 != TYPE_ALIAS_SET (ptr_type_node)))) - lev |= 5; + && set2 != TYPE_ALIAS_SET (ptr_type_node))) + lev |= 5; + } } return lev; |