diff options
Diffstat (limited to 'gcc/tree-ssanames.c')
| -rw-r--r-- | gcc/tree-ssanames.c | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/gcc/tree-ssanames.c b/gcc/tree-ssanames.c index d498270..2785e53 100644 --- a/gcc/tree-ssanames.c +++ b/gcc/tree-ssanames.c @@ -160,6 +160,7 @@ make_ssa_name (tree var, tree stmt) SSA_NAME_VAR (t) = var; SSA_NAME_DEF_STMT (t) = stmt; SSA_NAME_PTR_INFO (t) = NULL; + SSA_NAME_IN_FREE_LIST (t) = 0; return t; } @@ -176,6 +177,11 @@ make_ssa_name (tree var, tree stmt) void release_ssa_name (tree var) { + /* Never release the default definition for a symbol. It's a + special SSA name that should always exist once it's created. */ + if (var == var_ann (SSA_NAME_VAR (var))->default_def) + return; + /* release_ssa_name can be called multiple times on a single SSA_NAME. However, it should only end up on our free list one time. We keep a status bit in the SSA_NAME node itself to indicate it has @@ -216,4 +222,31 @@ duplicate_ssa_name (tree name, tree stmt) return new_name; } + +/* Release all the SSA_NAMEs created by STMT. */ + +void +release_defs (tree stmt) +{ + size_t i; + v_may_def_optype v_may_defs; + v_must_def_optype v_must_defs; + def_optype defs; + stmt_ann_t ann; + + ann = stmt_ann (stmt); + defs = DEF_OPS (ann); + v_may_defs = V_MAY_DEF_OPS (ann); + v_must_defs = V_MUST_DEF_OPS (ann); + + for (i = 0; i < NUM_DEFS (defs); i++) + release_ssa_name (DEF_OP (defs, i)); + + for (i = 0; i < NUM_V_MAY_DEFS (v_may_defs); i++) + release_ssa_name (V_MAY_DEF_RESULT (v_may_defs, i)); + + for (i = 0; i < NUM_V_MUST_DEFS (v_must_defs); i++) + release_ssa_name (V_MUST_DEF_OP (v_must_defs, i)); +} + #include "gt-tree-ssanames.h" |