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| author | Jan Hubicka <jh@suse.cz> | 2010-11-10 21:23:09 +0100 |
|---|---|---|
| committer | Jan Hubicka <hubicka@gcc.gnu.org> | 2010-11-10 20:23:09 +0000 |
| commit | c5d0600d09df75581455e2152500866aa5d49f2e (patch) | |
| tree | d022ce30fea75864afaa32f9c9554dbd2b710d9c /gcc/ipa-inline.c | |
| parent | d707fc773877a218f563042d5c26657c5d1bd736 (diff) | |
| download | gcc-c5d0600d09df75581455e2152500866aa5d49f2e.tar.gz | |
re PR tree-optimization/46228 (code produced for STL container is worse in 4.5.1 than in 4.4.5)
PR tree-optimize/46228
* doc/invoke.texi (comdat-sharing-probability): Document.
* ipa-inline.c (cgraph_estimate_growth): Handle COMDATs
* params.def (PARAM_COMDAT_SHARING_PROBABILITY): New param.
* g++.dg/tree-ssa/pr46228.C: New testcase.
From-SVN: r166555
Diffstat (limited to 'gcc/ipa-inline.c')
| -rw-r--r-- | gcc/ipa-inline.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/gcc/ipa-inline.c b/gcc/ipa-inline.c index 61fc6b9992e..d4109c5a21f 100644 --- a/gcc/ipa-inline.c +++ b/gcc/ipa-inline.c @@ -404,6 +404,12 @@ cgraph_estimate_growth (struct cgraph_node *node) if (cgraph_will_be_removed_from_program_if_no_direct_calls (node) && !DECL_EXTERNAL (node->decl) && !self_recursive) growth -= node->global.size; + /* COMDAT functions are very often not shared across multiple units since they + come from various template instantiations. Take this into account. */ + else if (DECL_COMDAT (node->decl) && !self_recursive + && cgraph_can_remove_if_no_direct_calls_p (node)) + growth -= (node->global.size + * (100 - PARAM_VALUE (PARAM_COMDAT_SHARING_PROBABILITY)) + 50) / 100; node->global.estimated_growth = growth; return growth; |