diff options
Diffstat (limited to 'gcc/c-decl.c')
| -rw-r--r-- | gcc/c-decl.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/gcc/c-decl.c b/gcc/c-decl.c index b759fd5..c2bbb95 100644 --- a/gcc/c-decl.c +++ b/gcc/c-decl.c @@ -1843,7 +1843,14 @@ duplicate_decls (newdecl, olddecl, different_binding_level) if (TREE_THIS_VOLATILE (newdecl)) { TREE_THIS_VOLATILE (write_olddecl) = 1; - if (TREE_CODE (newdecl) == VAR_DECL) + if (TREE_CODE (newdecl) == VAR_DECL + /* If an automatic variable is re-declared in the same + function scope, but the old declaration was not + volatile, make_var_volatile() would crash because the + variable would have been assigned to a pseudo, not a + MEM. Since this duplicate declaration is invalid + anyway, we just skip the call. */ + && errmsg == 0) make_var_volatile (newdecl); } |