diff options
| author | dberlin <dberlin@138bc75d-0d04-0410-961f-82ee72b054a4> | 2005-06-02 02:08:02 +0000 |
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| committer | dberlin <dberlin@138bc75d-0d04-0410-961f-82ee72b054a4> | 2005-06-02 02:08:02 +0000 |
| commit | 5d7bbf40fca8537c4d4fd1c9a1db5b0db017277e (patch) | |
| tree | e88167c1f3ba3028e1e78e4ced6d4794bc64cef5 /gcc/gimplify.c | |
| parent | 8be91f463371dbefd72844443768c5368156d031 (diff) | |
| download | gcc-5d7bbf40fca8537c4d4fd1c9a1db5b0db017277e.tar.gz | |
2005-06-01 Daniel Berlin <dberlin@dberlin.org>
Fix PR tree-optimization/21839
* gimplify.c (zero_sized_field_decl): New function.
(gimplify_init_ctor_eval): Use it.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@100477 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/gimplify.c')
| -rw-r--r-- | gcc/gimplify.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/gcc/gimplify.c b/gcc/gimplify.c index a659e77bb83..3370f449d01 100644 --- a/gcc/gimplify.c +++ b/gcc/gimplify.c @@ -2501,6 +2501,17 @@ gimplify_init_ctor_eval_range (tree object, tree lower, tree upper, pre_p); } +/* Return true if FDECL is accessing a field that is zero sized. */ + +static bool +zero_sized_field_decl (tree fdecl) +{ + if (TREE_CODE (fdecl) == FIELD_DECL && DECL_SIZE (fdecl) + && integer_zerop (DECL_SIZE (fdecl))) + return true; + return false; +} + /* A subroutine of gimplify_init_constructor. Generate individual MODIFY_EXPRs for a CONSTRUCTOR. OBJECT is the LHS against which the assignments should happen. LIST is the CONSTRUCTOR_ELTS of the @@ -2533,6 +2544,9 @@ gimplify_init_ctor_eval (tree object, tree list, tree *pre_p, bool cleared) so we don't have to figure out what's missing ourselves. */ gcc_assert (purpose); + if (zero_sized_field_decl (purpose)) + continue; + /* If we have a RANGE_EXPR, we have to build a loop to assign the whole range. */ if (TREE_CODE (purpose) == RANGE_EXPR) |