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r272405 - in /trunk/gcc: ChangeLog config/rs600...
- From: linkw at gcc dot gnu dot org
- To: gcc-cvs at gcc dot gnu dot org
- Date: Tue, 18 Jun 2019 05:08:03 -0000
- Subject: r272405 - in /trunk/gcc: ChangeLog config/rs600...
Author: linkw
Date: Tue Jun 18 05:08:02 2019
New Revision: 272405
URL: https://gcc.gnu.org/viewcvs?rev=272405&root=gcc&view=rev
Log:
Add one target hook predict_doloop_p, it return true if we can predict it
is possible to use a low-overhead loop, it can help ivopts to make some
better decisions.
PR middle-end/80791
* target.def (predict_doloop_p): New hook.
* targhooks.h (default_predict_doloop_p): New declaration.
* targhooks.c (default_predict_doloop_p): New function.
* doc/tm.texi.in (TARGET_PREDICT_DOLOOP_P): New hook.
* doc/tm.texi: Regenerate.
* config/rs6000/rs6000.c (rs6000_predict_doloop_p): New function.
(TARGET_PREDICT_DOLOOP_P): New macro.
* tree-ssa-loop-ivopts.c (generic_predict_doloop_p): New function.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/rs6000/rs6000.c
trunk/gcc/doc/tm.texi
trunk/gcc/doc/tm.texi.in
trunk/gcc/target.def
trunk/gcc/targhooks.c
trunk/gcc/targhooks.h
trunk/gcc/tree-ssa-loop-ivopts.c