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| author | Tom de Vries <tom@codesourcery.com> | 2015-11-16 12:40:24 +0000 |
|---|---|---|
| committer | Tom de Vries <vries@gcc.gnu.org> | 2015-11-16 12:40:24 +0000 |
| commit | 5ce8d99a1b45692a14b4a8aaf5b481738bf95172 (patch) | |
| tree | fa576c46796bf106c419ef642f60d7c8277203e6 /gcc/tree-ssa-dom.c | |
| parent | 2162bfe15e549b125b8183fc5f3d6e1d05ef5c98 (diff) | |
| download | gcc-5ce8d99a1b45692a14b4a8aaf5b481738bf95172.zip gcc-5ce8d99a1b45692a14b4a8aaf5b481738bf95172.tar.gz gcc-5ce8d99a1b45692a14b4a8aaf5b481738bf95172.tar.bz2 | |
Remove first_pass_instance from pass_dominator
2015-11-16 Tom de Vries <tom@codesourcery.com>
* passes.def: Add arg to pass_dominator pass instantiation.
* tree-pass.h (first_pass_instance): Remove pass_dominator-related bit
of comment.
* tree-ssa-dom.c (pass_dominator::pass_dominator): Initialize
may_peel_loop_headers_p.
(pass_dominator::set_pass_param): New member function. Set
may_peel_loop_headers_p.
(pass_dominator::may_peel_loop_headers_p): New private member.
(pass_dominator::execute): Use may_peel_loop_headers_p instead of
first_pass_instance.
From-SVN: r230417
Diffstat (limited to 'gcc/tree-ssa-dom.c')
| -rw-r--r-- | gcc/tree-ssa-dom.c | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/gcc/tree-ssa-dom.c b/gcc/tree-ssa-dom.c index 5cb2644..aeb726c 100644 --- a/gcc/tree-ssa-dom.c +++ b/gcc/tree-ssa-dom.c @@ -536,14 +536,26 @@ class pass_dominator : public gimple_opt_pass { public: pass_dominator (gcc::context *ctxt) - : gimple_opt_pass (pass_data_dominator, ctxt) + : gimple_opt_pass (pass_data_dominator, ctxt), + may_peel_loop_headers_p (false) {} /* opt_pass methods: */ opt_pass * clone () { return new pass_dominator (m_ctxt); } + void set_pass_param (unsigned int n, bool param) + { + gcc_assert (n == 0); + may_peel_loop_headers_p = param; + } virtual bool gate (function *) { return flag_tree_dom != 0; } virtual unsigned int execute (function *); + private: + /* This flag is used to prevent loops from being peeled repeatedly in jump + threading; it will be removed once we preserve loop structures throughout + the compilation -- we will be able to mark the affected loops directly in + jump threading, and avoid peeling them next time. */ + bool may_peel_loop_headers_p; }; // class pass_dominator unsigned int @@ -619,7 +631,7 @@ pass_dominator::execute (function *fun) free_all_edge_infos (); /* Thread jumps, creating duplicate blocks as needed. */ - cfg_altered |= thread_through_all_blocks (first_pass_instance); + cfg_altered |= thread_through_all_blocks (may_peel_loop_headers_p); if (cfg_altered) free_dominance_info (CDI_DOMINATORS); |