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| author | Jan Hubicka <jh@suse.cz> | 2010-09-24 21:14:51 +0200 |
|---|---|---|
| committer | Jan Hubicka <hubicka@gcc.gnu.org> | 2010-09-24 19:14:51 +0000 |
| commit | 46a4da10f5b00da1091d9641836f0550ce9a5120 (patch) | |
| tree | 3586ff30f00807c4e59b1bf02ac5e21a1cdad147 /gcc/tree-cfg.c | |
| parent | e1b793e7c10393b112937ce3e7de4db903052618 (diff) | |
| download | gcc-46a4da10f5b00da1091d9641836f0550ce9a5120.zip gcc-46a4da10f5b00da1091d9641836f0550ce9a5120.tar.gz gcc-46a4da10f5b00da1091d9641836f0550ce9a5120.tar.bz2 | |
extend.texi: (attribute leaf): Document.
* doc/extend.texi: (attribute leaf): Document.
* tree.c (local_define_builtin): Handle ECF_LEAF.
(build_common_builtin_nodes): Set ECF_LEAF where needed.
* tree.h (ECF_LEAF): New.
* ipa-reference.c (propagate_bits): For leaf calls propagate ever overwrittable
and unavailable functions.
(ipa_init): Put all_module_statics into optimization_summary_obstack.
(copy_global_bitmap): Do not copy all_module_statics.
(read_write_all_from_decl): Use cgraph_node argument; handle ECF_LEAF.
(propagate): Handle overwritable and unavailable leaf functions;
initialize global info for overwritable and unavailable leaf functions;
do not free all module statics.
(ipa_reference_get_not_read_global, ipa_reference_get_not_written_global):
leaf calls don't clobber local statics.
* calls.c (flags_from_decl_or_type): Handle leaf.
* tree-cfg.c (stmt_can_make_abnormal_goto): Leaf functions can't do
abnormal gotos.
* c-common.c (handle_leaf_attribute): New function.
(struct attribute_spec c_common_att): Add leaf.
* gcc.dg/tree-ssa/leaf.c: New testcase.
From-SVN: r164606
Diffstat (limited to 'gcc/tree-cfg.c')
| -rw-r--r-- | gcc/tree-cfg.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/gcc/tree-cfg.c b/gcc/tree-cfg.c index be8a84f..cf67fb8 100644 --- a/gcc/tree-cfg.c +++ b/gcc/tree-cfg.c @@ -2258,7 +2258,8 @@ is_ctrl_altering_stmt (gimple t) /* A non-pure/const call alters flow control if the current function has nonlocal labels. */ - if (!(flags & (ECF_CONST | ECF_PURE)) && cfun->has_nonlocal_label) + if (!(flags & (ECF_CONST | ECF_PURE | ECF_LEAF)) + && cfun->has_nonlocal_label) return true; /* A call also alters control flow if it does not return. */ @@ -2314,7 +2315,8 @@ stmt_can_make_abnormal_goto (gimple t) if (computed_goto_p (t)) return true; if (is_gimple_call (t)) - return gimple_has_side_effects (t) && cfun->has_nonlocal_label; + return (gimple_has_side_effects (t) && cfun->has_nonlocal_label + && !(gimple_call_flags (t) & ECF_LEAF)); return false; } |