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Do not leak SSANAMES in lto streamer

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* lto-streamer-in.c (input_cfg): Do not init ssa operands.
	(input_function): Do not init tree_ssa and set in_ssa_p.
	(input_ssa_names): Do it here.
	* tree-ssa.c (init_tree_ssa): Add additional SIZE parameter, default
	to 0
	* tree-ssanames.c (init_ssanames): Do not round size up to 50, allocate
	precisely.
	* tree-ssa.h (init_tree_ssa): Update prototype.
This commit is contained in:
Jan Hubicka 2020-11-23 16:52:36 +01:00
parent 204b61b906
commit 54af3008b6
4 changed files with 12 additions and 13 deletions
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8
gcc/lto-streamer-in.c
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@ -1017,7 +1017,6 @@ input_cfg (class lto_input_block *ib, class data_in *data_in,
int index;
init_empty_tree_cfg_for_function (fn);
init_ssa_operands (fn);
profile_status_for_fn (fn) = streamer_read_enum (ib, profile_status_d,
PROFILE_LAST);
@ -1144,7 +1143,9 @@ input_ssa_names (class lto_input_block *ib, class data_in *data_in,
unsigned int i, size;
size = streamer_read_uhwi (ib);
init_ssanames (fn, size);
init_tree_ssa (fn, size);
cfun->gimple_df->in_ssa_p = true;
init_ssa_operands (fn);
i = streamer_read_uhwi (ib);
while (i)
@ -1384,9 +1385,6 @@ input_function (tree fn_decl, class data_in *data_in,
push_struct_function (fn_decl);
fn = DECL_STRUCT_FUNCTION (fn_decl);
init_tree_ssa (fn);
/* We input IL in SSA form. */
cfun->gimple_df->in_ssa_p = true;
gimple_register_cfg_hooks ();

7
gcc/tree-ssa.c
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@ -1218,15 +1218,16 @@ err:
# pragma GCC diagnostic pop
#endif
/* Initialize global DFA and SSA structures. */
/* Initialize global DFA and SSA structures.
If SIZE is non-zero allocated ssa names array of a given size. */
void
init_tree_ssa (struct function *fn)
init_tree_ssa (struct function *fn, int size)
{
fn->gimple_df = ggc_cleared_alloc<gimple_df> ();
fn->gimple_df->default_defs = hash_table<ssa_name_hasher>::create_ggc (20);
pt_solution_reset (&fn->gimple_df->escaped);
init_ssanames (fn, 0);
init_ssanames (fn, size);
}
/* Deallocate memory associated with SSA data structures for FNDECL. */

2
gcc/tree-ssa.h
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@ -45,7 +45,7 @@ extern void insert_debug_temps_for_defs (gimple_stmt_iterator *);
extern void reset_debug_uses (gimple *);
extern void release_defs_bitset (bitmap toremove);
extern void verify_ssa (bool, bool);
extern void init_tree_ssa (function *);
extern void init_tree_ssa (function *, int size = 0);
extern void delete_tree_ssa (function *);
extern bool tree_ssa_useless_type_conversion (tree);
extern tree tree_ssa_strip_useless_type_conversions (tree);

8
gcc/tree-ssanames.c
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@ -77,10 +77,10 @@ unsigned int ssa_name_nodes_created;
void
init_ssanames (struct function *fn, int size)
{
if (size < 50)
size = 50;
vec_alloc (SSANAMES (fn), size);
if (!size)
vec_alloc (SSANAMES (fn), 50);
else
vec_safe_reserve (SSANAMES (fn), size, true);
/* Version 0 is special, so reserve the first slot in the table. Though
currently unused, we may use version 0 in alias analysis as part of