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| author | Jeff Law <law@redhat.com> | 2004-09-21 22:07:23 -0600 |
|---|---|---|
| committer | Jeff Law <law@gcc.gnu.org> | 2004-09-21 22:07:23 -0600 |
| commit | 195da47bbbf6402e3147dc1e6be6cacde140f7f3 (patch) | |
| tree | ba1ee7d893d35a339821c16a830d1a3c262c07e7 /gcc/tree.h | |
| parent | 0a4f0294304e28e3a5012ac4e1eaf966314de0c2 (diff) | |
| download | gcc-195da47bbbf6402e3147dc1e6be6cacde140f7f3.tar.gz | |
tree-ssa-ccp.c (get_default_value): If we have a constant value recorded for an SSA_NAME...
* tree-ssa-ccp.c (get_default_value): If we have a constant
value recorded for an SSA_NAME, then use that constant as
the initial lattice value.
(substitute_and_fold): Transfer equivalences discovered into
SSA_NAME_EQUIV.
* tree.h (SSA_NAME_EQUIV): Add comments.
(SET_SSA_NAME_EQUIV): Similarly.
From-SVN: r87844
Diffstat (limited to 'gcc/tree.h')
| -rw-r--r-- | gcc/tree.h | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/gcc/tree.h b/gcc/tree.h index 0f78e743897..e2742bc5c68 100644 --- a/gcc/tree.h +++ b/gcc/tree.h @@ -1304,13 +1304,14 @@ struct tree_exp GTY(()) #define SSA_NAME_OCCURS_IN_ABNORMAL_PHI(NODE) \ SSA_NAME_CHECK (NODE)->common.asm_written_flag - /* Nonzero if this SSA_NAME expression is currently on the free list of SSA_NAMES. Using NOTHROW_FLAG seems reasonably safe since throwing has no meaning for an SSA_NAME. */ #define SSA_NAME_IN_FREE_LIST(NODE) \ SSA_NAME_CHECK (NODE)->common.nothrow_flag +/* If NAME is equivalent to some other SSA_NAME or an invariant, then + return the equivalent SSA_NAME or invariant, else return NULL. */ #define SSA_NAME_EQUIV(NAME) __extension__ \ ({ tree equiv = SSA_NAME_CHECK (NAME)->ssa_name.equiv; \ if (equiv && TREE_CODE (equiv) == SSA_NAME) \ @@ -1318,6 +1319,8 @@ struct tree_exp GTY(()) equiv; \ }) +/* Record that NAME (an SSA_NAME) is equivalent to EQUIV. */ + #define SET_SSA_NAME_EQUIV(NAME, EQUIV)\ SSA_NAME_CHECK (NAME)->ssa_name.equiv = (EQUIV); |