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Diffstat (limited to 'gcc/doc/passes.texi')
| -rw-r--r-- | gcc/doc/passes.texi | 23 |
1 files changed, 9 insertions, 14 deletions
diff --git a/gcc/doc/passes.texi b/gcc/doc/passes.texi index e2fcc7a5d02..bb6a3f0056d 100644 --- a/gcc/doc/passes.texi +++ b/gcc/doc/passes.texi @@ -574,20 +574,15 @@ are in @file{lcm.c}. @item Loop optimization -This pass moves constant expressions out of loops, and optionally does -strength-reduction as well. The pass is located in @file{loop.c}. -Loop dependency analysis routines are contained in @file{dependence.c}. -This pass is seriously out-of-date and is supposed to be replaced by -a new one described below in near future. - -A second loop optimization pass takes care of basic block level -optimizations---unrolling, peeling and unswitching loops. The source -files are @file{cfgloopanal.c} and @file{cfgloopmanip.c} containing -generic loop analysis and manipulation code, @file{loop-init.c} with -initialization and finalization code, @file{loop-unswitch.c} for loop -unswitching and @file{loop-unroll.c} for loop unrolling and peeling. -It also contains a separate loop invariant motion pass implemented in -@file{loop-invariant.c}. +This pass performs several loop related optimizations. +The source files @file{cfgloopanal.c} and @file{cfgloopmanip.c} contain +generic loop analysis and manipulation code. Initialization and finalization +of loop structures is handled by @file{loop-init.c}. +A loop invariant motion pass is implemented in @file{loop-invariant.c}. +Basic block level optimizations---unrolling, peeling and unswitching loops--- +are implemented in @file{loop-unswitch.c} and @file{loop-unroll.c}. +Replacing of the exit condition of loops by special machine-dependent +instructions is handled by @file{loop-doloop.c}. @item Jump bypassing |