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[PATCH][pretty-ipa] Add early FRE pass
- From: Richard Guenther <rguenther at suse dot de>
- To: gcc-patches at gcc dot gnu dot org
- Cc: Jan Hubicka <jh at suse dot de>
- Date: Tue, 22 Feb 2011 13:18:31 +0100 (CET)
- Subject: [PATCH][pretty-ipa] Add early FRE pass
As base for inliner heuristic tunings this adds the long awaited
early FRE pass. There are basically two placement choices that
make sense, before and after early SRA. We get slightly less odd
code for tramp3d when placing it after so this is what the patch
does (this variant was also tested more extensively). IMHO early
SRA should go away and update-address-taken should be made a little
more aggressive.
Bootstrapped on x86_64-unknown-linux-gnu, testing in progress, will
apply to pretty-ipa if that succeeds.
I'll use gcc/ChangeLog.pretty-ipa.
Richard.
2011-02-22 Richard Guenther <rguenther@suse.de>
* passes.c (init_optimization_passes): Add FRE pass after
early SRA.
Index: gcc/passes.c
===================================================================
*** gcc/passes.c (revision 170394)
--- gcc/passes.c (working copy)
*************** init_optimization_passes (void)
*** 762,767 ****
--- 762,768 ----
locals into SSA form if possible. */
NEXT_PASS (pass_build_ealias);
NEXT_PASS (pass_sra_early);
+ NEXT_PASS (pass_fre);
NEXT_PASS (pass_copy_prop);
NEXT_PASS (pass_merge_phi);
NEXT_PASS (pass_cd_dce);