diff options
Diffstat (limited to 'gcc/tree-ssa-loop-manip.c')
| -rw-r--r-- | gcc/tree-ssa-loop-manip.c | 26 |
1 files changed, 13 insertions, 13 deletions
diff --git a/gcc/tree-ssa-loop-manip.c b/gcc/tree-ssa-loop-manip.c index bc5c3392a0f..7c54c87e74f 100644 --- a/gcc/tree-ssa-loop-manip.c +++ b/gcc/tree-ssa-loop-manip.c @@ -1,18 +1,18 @@ /* High-level loop manipulation functions. Copyright (C) 2004, 2005, 2006, 2007, 2008 Free Software Foundation, Inc. - + This file is part of GCC. - + GCC is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3, or (at your option) any later version. - + GCC is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. - + You should have received a copy of the GNU General Public License along with GCC; see the file COPYING3. If not see <http://www.gnu.org/licenses/>. */ @@ -43,7 +43,7 @@ along with GCC; see the file COPYING3. If not see It is expected that neither BASE nor STEP are shared with other expressions (unless the sharing rules allow this). Use VAR as a base var_decl for it (if NULL, a new temporary will be created). The increment will occur at - INCR_POS (after it if AFTER is true, before it otherwise). INCR_POS and + INCR_POS (after it if AFTER is true, before it otherwise). INCR_POS and AFTER can be computed using standard_iv_increment_position. The ssa versions of the variable before and after increment will be stored in VAR_BEFORE and VAR_AFTER (unless they are NULL). */ @@ -302,11 +302,11 @@ find_uses_to_rename_bb (basic_block bb, bitmap *use_blocks, bitmap need_phis) for (bsi = gsi_start_phis (e->dest); !gsi_end_p (bsi); gsi_next (&bsi)) find_uses_to_rename_use (bb, PHI_ARG_DEF_FROM_EDGE (gsi_stmt (bsi), e), use_blocks, need_phis); - + for (bsi = gsi_start_bb (bb); !gsi_end_p (bsi); gsi_next (&bsi)) find_uses_to_rename_stmt (gsi_stmt (bsi), use_blocks, need_phis); } - + /* Marks names that are used outside of the loop they are defined in for rewrite. Records the set of blocks in that the ssa names are defined to USE_BLOCKS. If CHANGED_BBS is not NULL, @@ -360,7 +360,7 @@ find_uses_to_rename (bitmap changed_bbs, bitmap *use_blocks, bitmap need_phis) Looking from the outer loop with the normal SSA form, the first use of k is not well-behaved, while the second one is an induction variable with base 99 and step 1. - + If CHANGED_BBS is not NULL, we look for uses outside loops only in the basic blocks in this set. @@ -414,7 +414,7 @@ check_loop_closed_ssa_use (basic_block bb, tree use) { gimple def; basic_block def_bb; - + if (TREE_CODE (use) != SSA_NAME || !is_gimple_reg (use)) return; @@ -818,7 +818,7 @@ scale_dominated_blocks_in_loop (struct loop *loop, basic_block bb, If N is number of iterations of the loop and MAY_BE_ZERO is the condition under that loop exits in the first iteration even if N != 0, - + while (1) { x = phi (init, next); @@ -831,7 +831,7 @@ scale_dominated_blocks_in_loop (struct loop *loop, basic_block bb, becomes (with possibly the exit conditions formulated a bit differently, avoiding the need to create a new iv): - + if (MAY_BE_ZERO || N < FACTOR) goto rest; @@ -847,7 +847,7 @@ scale_dominated_blocks_in_loop (struct loop *loop, basic_block bb, pre; post; N -= FACTOR; - + } while (N >= FACTOR); rest: @@ -862,7 +862,7 @@ scale_dominated_blocks_in_loop (struct loop *loop, basic_block bb, break; post; } - + Before the loop is unrolled, TRANSFORM is called for it (only for the unrolled loop, but not for its versioned copy). DATA is passed to TRANSFORM. */ |