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| author | Martin Jambor <mjambor@suse.cz> | 2014-05-23 17:52:20 +0200 |
|---|---|---|
| committer | Martin Jambor <jamborm@gcc.gnu.org> | 2014-05-23 17:52:20 +0200 |
| commit | 8aab5218424ce6d1a646dc9d564413359a352911 (patch) | |
| tree | 53c92a4f7618b3834b1977f450705e4f7455e04f /gcc/doc | |
| parent | 63b0b10636f294a6f45a0ebb172ae422b5385da4 (diff) | |
| download | gcc-8aab5218424ce6d1a646dc9d564413359a352911.zip gcc-8aab5218424ce6d1a646dc9d564413359a352911.tar.gz gcc-8aab5218424ce6d1a646dc9d564413359a352911.tar.bz2 | |
re PR tree-optimization/53787 (Possible IPA-SRA / IPA-CP improvement)
2014-05-23 Martin Jambor <mjambor@suse.cz>
PR tree-optimization/53787
* params.def (PARAM_IPA_MAX_AA_STEPS): New param.
* ipa-prop.h (ipa_node_params): Rename uses_analysis_done to
analysis_done, update all uses.
* ipa-prop.c: Include domwalk.h
(param_analysis_info): Removed.
(param_aa_status): New type.
(ipa_bb_info): Likewise.
(func_body_info): Likewise.
(ipa_get_bb_info): New function.
(aa_overwalked): Likewise.
(find_dominating_aa_status): Likewise.
(parm_bb_aa_status_for_bb): Likewise.
(parm_preserved_before_stmt_p): Changed to use new param AA info.
(load_from_unmodified_param): Accept func_body_info as a parameter
instead of parms_ainfo.
(parm_ref_data_preserved_p): Changed to use new param AA info.
(parm_ref_data_pass_through_p): Likewise.
(ipa_load_from_parm_agg_1): Likewise. Update callers.
(compute_complex_assign_jump_func): Changed to use new param AA info.
(compute_complex_ancestor_jump_func): Likewise.
(ipa_compute_jump_functions_for_edge): Likewise.
(ipa_compute_jump_functions): Removed.
(ipa_compute_jump_functions_for_bb): New function.
(ipa_analyze_indirect_call_uses): Likewise, moved variable
declarations down.
(ipa_analyze_virtual_call_uses): Accept func_body_info instead of node
and info, moved variable declarations down.
(ipa_analyze_call_uses): Accept and pass on func_body_info instead of
node and info.
(ipa_analyze_stmt_uses): Likewise.
(ipa_analyze_params_uses): Removed.
(ipa_analyze_params_uses_in_bb): New function.
(ipa_analyze_controlled_uses): Likewise.
(free_ipa_bb_info): Likewise.
(analysis_dom_walker): New class.
(ipa_analyze_node): Handle node-specific forbidden analysis,
initialize and free func_body_info, use dominator walker.
(ipcp_modif_dom_walker): New class.
(ipcp_transform_function): Create and free func_body_info, use
ipcp_modif_dom_walker, moved a lot of functionality there.
From-SVN: r210864
Diffstat (limited to 'gcc/doc')
| -rw-r--r-- | gcc/doc/invoke.texi | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi index 34ba721..fcdcb1d 100644 --- a/gcc/doc/invoke.texi +++ b/gcc/doc/invoke.texi @@ -10108,6 +10108,13 @@ an array access known, it adds a bonus of @option{ipa-cp-array-index-hint-bonus} bonus to the profitability score of the candidate. +@item ipa-max-aa-steps +During its analysis of function bodies, IPA-CP employs alias analysis +in order to track values pointed to by function parameters. In order +not spend too much time analyzing huge functions, it will give up and +consider all memory clobbered after examining +@option{ipa-max-aa-steps} statements modifying memory. + @item lto-partitions Specify desired number of partitions produced during WHOPR compilation. The number of partitions should exceed the number of CPUs used for compilation. |