diff options
| author | Richard Henderson <rth@redhat.com> | 2000-11-21 11:09:38 -0800 |
|---|---|---|
| committer | Richard Henderson <rth@gcc.gnu.org> | 2000-11-21 11:09:38 -0800 |
| commit | 3fe30ff6f7652648c0c2882815ad2f52e51c06db (patch) | |
| tree | 7b19327f6425471460eda074c9f38f18c4323d1a /gcc/c-common.c | |
| parent | 3adbce3d89170e4c84697de5c71d5486b029f26f (diff) | |
| download | gcc-3fe30ff6f7652648c0c2882815ad2f52e51c06db.zip gcc-3fe30ff6f7652648c0c2882815ad2f52e51c06db.tar.gz gcc-3fe30ff6f7652648c0c2882815ad2f52e51c06db.tar.bz2 | |
c-common.c (c_unsafe_for_reeval): New function.
* c-common.c (c_unsafe_for_reeval): New function.
(add_c_tree_codes): Register it.
* c-common.h: Declare it.
* tree.c (lang_unsafe_for_reeval): New hook.
(unsafe_for_reeval): Call it.
* tree.h: Declare it.
From-SVN: r37623
Diffstat (limited to 'gcc/c-common.c')
| -rw-r--r-- | gcc/c-common.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/gcc/c-common.c b/gcc/c-common.c index 05b7b8a..59bc43e 100644 --- a/gcc/c-common.c +++ b/gcc/c-common.c @@ -5924,6 +5924,20 @@ c_safe_from_p (target, exp) return 1; } +/* Hook used by unsafe_for_reeval to handle language-specific tree codes. */ + +int +c_unsafe_for_reeval (exp) + tree exp; +{ + /* Statement expressions may not be reevaluated. */ + if (TREE_CODE (exp) == STMT_EXPR) + return 2; + + /* Walk all other expressions. */ + return -1; +} + /* Tree code classes. */ #define DEFTREECODE(SYM, NAME, TYPE, LENGTH) TYPE, @@ -5971,6 +5985,7 @@ add_c_tree_codes () memcpy (tree_code_name + (int) LAST_AND_UNUSED_TREE_CODE, c_tree_code_name, (LAST_C_TREE_CODE - (int)LAST_AND_UNUSED_TREE_CODE) * sizeof (char *)); + lang_unsafe_for_reeval = c_unsafe_for_reeval; } #define CALLED_AS_BUILT_IN(NODE) \ |