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| author | Richard Stallman <rms@gnu.org> | 1993-01-25 06:37:20 +0000 |
|---|---|---|
| committer | Richard Stallman <rms@gnu.org> | 1993-01-25 06:37:20 +0000 |
| commit | e19a77e63b5b2004eb8bd83cfecc87832149ef52 (patch) | |
| tree | bdb4c8926d55c304aa93e628fdcc6f0fdd29201d | |
| parent | 7d9795e55251f0bbd8ae853c2aca0f35dba431e3 (diff) | |
| download | gcc-e19a77e63b5b2004eb8bd83cfecc87832149ef52.zip gcc-e19a77e63b5b2004eb8bd83cfecc87832149ef52.tar.gz gcc-e19a77e63b5b2004eb8bd83cfecc87832149ef52.tar.bz2 | |
(unary_expr => ANDAND identifier): Handle lookup_label returning 0.
From-SVN: r3325
| -rw-r--r-- | gcc/c-parse.in | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/gcc/c-parse.in b/gcc/c-parse.in index 6ee9c81..a40dbfe 100644 --- a/gcc/c-parse.in +++ b/gcc/c-parse.in @@ -390,9 +390,15 @@ unary_expr: /* Refer to the address of a label as a pointer. */ | ANDAND identifier { tree label = lookup_label ($2); - TREE_USED (label) = 1; - $$ = build1 (ADDR_EXPR, ptr_type_node, label); - TREE_CONSTANT ($$) = 1; } + if (label == 0) + $$ = null_pointer_node; + else + { + TREE_USED (label) = 1; + $$ = build1 (ADDR_EXPR, ptr_type_node, label); + TREE_CONSTANT ($$) = 1; + } + } /* This seems to be impossible on some machines, so let's turn it off. You can use __builtin_next_arg to find the anonymous stack args. | '&' ELLIPSIS |