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| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/c-typeck.c | 8 |
2 files changed, 13 insertions, 0 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 48e06ce..2e4b04a 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +2004-09-11 Richard Henderson <rth@redhat.com> + + PR c/17396 + * c-typeck.c (build_unary_op): Add legacy offsetof hack. + 2004-09-11 Kazu Hirata <kazu@cs.umass.edu> * doc/cfg.texi, doc/hostconfig.texi, doc/install.texi, diff --git a/gcc/c-typeck.c b/gcc/c-typeck.c index b06085d..85ba9ce 100644 --- a/gcc/c-typeck.c +++ b/gcc/c-typeck.c @@ -2619,6 +2619,14 @@ build_unary_op (enum tree_code code, tree xarg, int flag) } argtype = build_pointer_type (argtype); + + /* ??? Cope with user tricks that amount to offsetof. Delete this + when we have proper support for integer constant expressions. */ + val = get_base_address (arg); + if (val && TREE_CODE (val) == INDIRECT_REF + && integer_zerop (TREE_OPERAND (val, 0))) + return fold_convert (argtype, fold_offsetof (arg)); + val = build1 (ADDR_EXPR, argtype, arg); if (TREE_CODE (arg) == COMPOUND_LITERAL_EXPR) |