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re PR lto/61886 (LTO breaks fread with _FORTIFY_SOURCE=2)

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PR ipa/61886
	PR middle-end/25140
	* ipa-reference.c (ipa_reference_get_not_read_global,
	ipa_reference_get_not_read_global): Fix WRT aliases.
	(is_improper): Break out from ...
	(is_proper_for_analysis): ... here; fix WRT aliases.
	(analyze_function, generate_summary,
	ipa_reference_write_optimization_summary,
	ipa_reference_read_optimization_summary): Use ipa_reference_var_uid.
	* ipa-refrence.h (ipa_reference_var_uid): New inline.
	* tree-ssa-alias.c: Revert my accidental previous commit.
	(ref_maybe_used_by_call_p_1,
	call_may_clobber_ref_p_1): Use ipa_reference_var_uid.

From-SVN: r231471
This commit is contained in:
Jan Hubicka 2015-12-09 19:29:38 +00:00
parent 0a04f2dfc2
commit 1326155711
3 changed files with 53 additions and 32 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
gcc/ChangeLog
View File

@ -1,3 +1,19 @@
2015-12-08 Jan Hubicka <hubicka@ucw.cz>
PR ipa/61886
PR middle-end/25140
* ipa-reference.c (ipa_reference_get_not_read_global,
ipa_reference_get_not_read_global): Fix WRT aliases.
(is_improper): Break out from ...
(is_proper_for_analysis): ... here; fix WRT aliases.
(analyze_function, generate_summary,
ipa_reference_write_optimization_summary,
ipa_reference_read_optimization_summary): Use ipa_reference_var_uid.
* ipa-refrence.h (ipa_reference_var_uid): New inline.
* tree-ssa-alias.c: Revert my accidental previous commit.
(ref_maybe_used_by_call_p_1,
call_may_clobber_ref_p_1): Use ipa_reference_var_uid.
2015-12-09 Andreas Tobler <andreast@gcc.gnu.org>
* config/rs6000/freebsd64.h: Remove the redefinition of WCHAR_TYPE.
@ -119,6 +135,7 @@
* tree-vectorizer.h (set_vinfo_for_stmt): Assert we don't
overwrite an existing entry.
>>>>>>> .r231469
2015-12-09 Chung-Lin Tang <cltang@codesourcery.com>
* c-family/c-omp.c (c_finish_oacc_wait): Remove add_stmt() call.

36
gcc/ipa-reference.c
View File

@ -174,14 +174,22 @@ set_reference_optimization_summary (struct cgraph_node *node,
bitmap
ipa_reference_get_not_read_global (struct cgraph_node *fn)
{
if (!opt_for_fn (fn->decl, flag_ipa_reference)
|| !opt_for_fn (current_function_decl, flag_ipa_reference))
if (!opt_for_fn (current_function_decl, flag_ipa_reference))
return NULL;
enum availability avail;
struct cgraph_node *fn2 = fn->function_symbol (&avail);
ipa_reference_optimization_summary_t info =
get_reference_optimization_summary (fn->function_symbol (NULL));
if (info)
get_reference_optimization_summary (fn2);
if (info
&& (avail >= AVAIL_AVAILABLE
|| (avail == AVAIL_INTERPOSABLE
&& flags_from_decl_or_type (fn->decl) & ECF_LEAF))
&& opt_for_fn (fn2->decl, flag_ipa_reference))
return info->statics_not_read;
else if (flags_from_decl_or_type (fn->decl) & ECF_LEAF)
else if (avail == AVAIL_NOT_AVAILABLE
&& flags_from_decl_or_type (fn->decl) & ECF_LEAF)
return all_module_statics;
else
return NULL;
@ -195,14 +203,22 @@ ipa_reference_get_not_read_global (struct cgraph_node *fn)
bitmap
ipa_reference_get_not_written_global (struct cgraph_node *fn)
{
if (!opt_for_fn (fn->decl, flag_ipa_reference)
|| !opt_for_fn (current_function_decl, flag_ipa_reference))
if (!opt_for_fn (current_function_decl, flag_ipa_reference))
return NULL;
enum availability avail;
struct cgraph_node *fn2 = fn->function_symbol (&avail);
ipa_reference_optimization_summary_t info =
get_reference_optimization_summary (fn);
if (info)
get_reference_optimization_summary (fn2);
if (info
&& (avail >= AVAIL_AVAILABLE
|| (avail == AVAIL_INTERPOSABLE
&& flags_from_decl_or_type (fn->decl) & ECF_LEAF))
&& opt_for_fn (fn2->decl, flag_ipa_reference))
return info->statics_not_written;
else if (flags_from_decl_or_type (fn->decl) & ECF_LEAF)
else if (avail == AVAIL_NOT_AVAILABLE
&& flags_from_decl_or_type (fn->decl) & ECF_LEAF)
return all_module_statics;
else
return NULL;

32
gcc/tree-ssa-alias.c
View File

@ -1739,21 +1739,15 @@ ref_maybe_used_by_call_p_1 (gcall *call, ao_ref *ref)
&& TREE_STATIC (base))
{
struct cgraph_node *node = cgraph_node::get (callee);
bitmap not_read;
/* FIXME: Callee can be an OMP builtin that does not have a call graph
node yet. We should enforce that there are nodes for all decls in the
IL and remove this check instead. */
if (node)
{
enum availability avail;
bitmap not_read;
node = node->ultimate_alias_target (&avail);
if (avail >= AVAIL_AVAILABLE
&& (not_read = ipa_reference_get_not_read_global (node))
&& bitmap_bit_p (not_read, ipa_reference_var_uid (base)))
goto process_args;
}
if (node
&& (not_read = ipa_reference_get_not_read_global (node))
&& bitmap_bit_p (not_read, ipa_reference_var_uid (base)))
goto process_args;
}
/* Check if the base variable is call-used. */
@ -2134,18 +2128,12 @@ call_may_clobber_ref_p_1 (gcall *call, ao_ref *ref)
&& TREE_STATIC (base))
{
struct cgraph_node *node = cgraph_node::get (callee);
bitmap not_written;
if (node)
{
bitmap not_written;
enum availability avail;
node = node->ultimate_alias_target (&avail);
if (avail >= AVAIL_AVAILABLE
&& (not_written = ipa_reference_get_not_written_global (node))
&& bitmap_bit_p (not_written, ipa_reference_var_uid (base)))
return false;
}
if (node
&& (not_written = ipa_reference_get_not_written_global (node))
&& bitmap_bit_p (not_written, ipa_reference_var_uid (base)))
return false;
}
/* Check if the base variable is call-clobbered. */