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| author | Richard Guenther <rguenther@suse.de> | 2008-07-14 15:38:49 +0000 |
|---|---|---|
| committer | Richard Biener <rguenth@gcc.gnu.org> | 2008-07-14 15:38:49 +0000 |
| commit | caf55296b96659b2e2635680df283af32f8fa5d7 (patch) | |
| tree | f75e8afb6ceee98eeb6903a3791525145691294c /gcc/tree-ssa-ccp.c | |
| parent | d27cc24c97bbd7f27e7bde76a04af56e773b82fe (diff) | |
| download | gcc-caf55296b96659b2e2635680df283af32f8fa5d7.zip gcc-caf55296b96659b2e2635680df283af32f8fa5d7.tar.gz gcc-caf55296b96659b2e2635680df283af32f8fa5d7.tar.bz2 | |
tree-ssa-sccvn.c (pre_info): Remove.
2008-07-14 Richard Guenther <rguenther@suse.de>
* tree-ssa-sccvn.c (pre_info): Remove.
(switch_to_PRE_table): Likewise.
(free_scc_vn): Do not clear SSA_NAME_VALUE.
Do not free pre_info.
(set_hashtable_value_ids): Do not create value-ids for the
optimistic tables.
(run_scc_vn): Remove double test. Remove bogus special-case
in value-number printing.
* tree-ssa-sccvn.h (switch_to_PRE_table): Remove.
* tree-ssa-ccp.c (get_symbol_constant_value): Do not look at
SSA_NAME_VALUE.
* tree-flow-inline.h (get_value_handle): Remove.
* tree-flow.h (get_value_handle): Remove.
From-SVN: r137787
Diffstat (limited to 'gcc/tree-ssa-ccp.c')
| -rw-r--r-- | gcc/tree-ssa-ccp.c | 13 |
1 files changed, 2 insertions, 11 deletions
diff --git a/gcc/tree-ssa-ccp.c b/gcc/tree-ssa-ccp.c index 3b90da4..4b6fe6a 100644 --- a/gcc/tree-ssa-ccp.c +++ b/gcc/tree-ssa-ccp.c @@ -310,13 +310,10 @@ get_symbol_constant_value (tree sym) change the constant value of the PHI node, which allows for more constants to be propagated. - 3- If SSA_NAME_VALUE is set and it is a constant, its value is - used. - - 4- Variables defined by statements other than assignments and PHI + 3- Variables defined by statements other than assignments and PHI nodes are considered VARYING. - 5- Initial values of variables that are not GIMPLE registers are + 4- Initial values of variables that are not GIMPLE registers are considered VARYING. */ static prop_value_t @@ -332,12 +329,6 @@ get_default_value (tree var) non-register when DO_STORE_CCP is false. */ val.lattice_val = VARYING; } - else if (SSA_NAME_VALUE (var) - && is_gimple_min_invariant (SSA_NAME_VALUE (var))) - { - val.lattice_val = CONSTANT; - val.value = SSA_NAME_VALUE (var); - } else if ((cst_val = get_symbol_constant_value (sym)) != NULL_TREE) { /* Globals and static variables declared 'const' take their |