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| author | Daniel Berlin <dberlin@dberlin.org> | 2005-06-02 02:08:02 +0000 |
|---|---|---|
| committer | Daniel Berlin <dberlin@gcc.gnu.org> | 2005-06-02 02:08:02 +0000 |
| commit | 292a398fb78ca6012b17481992ffa220a62d2b96 (patch) | |
| tree | e88167c1f3ba3028e1e78e4ced6d4794bc64cef5 /gcc | |
| parent | 39da352fad54fd28370547680978640e5c4fae5a (diff) | |
| download | gcc-292a398fb78ca6012b17481992ffa220a62d2b96.zip gcc-292a398fb78ca6012b17481992ffa220a62d2b96.tar.gz gcc-292a398fb78ca6012b17481992ffa220a62d2b96.tar.bz2 | |
re PR tree-optimization/21839 (ICE for missing V_DEFS caused by salias with empty structures)
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.
From-SVN: r100477
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 8 | ||||
| -rw-r--r-- | gcc/gimplify.c | 14 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.c-torture/compile/pr21839.c | 12 |
3 files changed, 33 insertions, 1 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 1531a27..8b879e5 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,10 @@ +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. + 2005-06-01 Josh Conner <jconner@apple.com> PR 21478 @@ -199,7 +206,6 @@ * Makefile.in: Update dependencies. - 2005-06-01 Danny Smith <dannysmith@users.sourceforge.net> * config/i386/cygming.h (NO_PROFILE_COUNTERS): Define. diff --git a/gcc/gimplify.c b/gcc/gimplify.c index a659e77..3370f44 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) diff --git a/gcc/testsuite/gcc.c-torture/compile/pr21839.c b/gcc/testsuite/gcc.c-torture/compile/pr21839.c new file mode 100644 index 0000000..c02085c --- /dev/null +++ b/gcc/testsuite/gcc.c-torture/compile/pr21839.c @@ -0,0 +1,12 @@ + typedef struct { } spinlock_t; +typedef struct { + unsigned sequence; + spinlock_t lock; +} seqlock_t; +void ext3_new_inode(seqlock_t *rsv_seqlock) +{ + *rsv_seqlock = (seqlock_t) { 0, (spinlock_t) { } }; + +} + + |