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author | Jan Hubicka <hubicka@ucw.cz> | 2017-02-11 18:56:02 +0100 |
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committer | Jan Hubicka <hubicka@gcc.gnu.org> | 2017-02-11 17:56:02 +0000 |
commit | acbbac0444a599e77b59b4d21186c9c2118b9f84 (patch) | |
tree | 0efc3420ad98c534a5761346fa3b54636f7219b0 /gcc/ipa-utils.c | |
parent | bc61048a143b10d8efdc50195f2fc949d036ca92 (diff) | |
download | gcc-acbbac0444a599e77b59b4d21186c9c2118b9f84.zip gcc-acbbac0444a599e77b59b4d21186c9c2118b9f84.tar.gz gcc-acbbac0444a599e77b59b4d21186c9c2118b9f84.tar.bz2 |
re PR middle-end/56727 (Recursive call goes through the PLT unnecessarily)
PR tree-ssa/56727
* gcc.dg/tree-ssa/pr56727.c: New testcase.
* ipa-utils.c (recursive_call_p): Be more careful about interposition.
From-SVN: r245359
Diffstat (limited to 'gcc/ipa-utils.c')
-rw-r--r-- | gcc/ipa-utils.c | 18 |
1 files changed, 16 insertions, 2 deletions
diff --git a/gcc/ipa-utils.c b/gcc/ipa-utils.c index fc1ae1e..98a4f11 100644 --- a/gcc/ipa-utils.c +++ b/gcc/ipa-utils.c @@ -639,6 +639,20 @@ recursive_call_p (tree func, tree dest) { struct cgraph_node *dest_node = cgraph_node::get_create (dest); struct cgraph_node *cnode = cgraph_node::get_create (func); - - return dest_node->semantically_equivalent_p (cnode); + ipa_ref *alias; + enum availability avail; + + gcc_assert (!cnode->alias); + if (cnode != dest_node->ultimate_alias_target (&avail)) + return false; + if (avail >= AVAIL_AVAILABLE) + return true; + if (!dest_node->semantically_equivalent_p (cnode)) + return false; + /* If there is only one way to call the fuction or we know all of them + are semantically equivalent, we still can consider call recursive. */ + FOR_EACH_ALIAS (cnode, alias) + if (!dest_node->semantically_equivalent_p (alias->referring)) + return false; + return true; } |