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riscv-gcc-1
Commit b2dfd40f by J"orn Rennecke Committed by Joern Rennecke
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* sched-rgn.c (init_regions): Update comment. 

From-SVN: r60340
parent 310b9b1d
Showing with 8 additions and 11 deletions
gcc/ChangeLog
Thu Dec 19 23:44:09 2002 J"orn Rennecke <joern.rennecke@superh.com>
* sched-rgn.c (init_regions): Update comment.
2002-12-19 David Edelsohn <edelsohn@gnu.org>
* config/rs6000/rs6000.md (define_attr type): Remove altivec.
......
gcc/sched-rgn.c
......@@ -2909,17 +2909,10 @@ init_regions ()
dominance_info dom;
struct edge_list *edge_list;
/* The scheduler runs after flow; therefore, we can't blindly call
back into find_basic_blocks since doing so could invalidate the
info in global_live_at_start.
Consider a block consisting entirely of dead stores; after life
analysis it would be a block of NOTE_INSN_DELETED notes. If
we call find_basic_blocks again, then the block would be removed
entirely and invalidate our the register live information.
We could (should?) recompute register live information. Doing
so may even be beneficial. */
/* The scheduler runs after estimate_probabilities; therefore, we
can't blindly call back into find_basic_blocks since doing so
could invalidate the branch probability info. We could,
however, call cleanup_cfg. */
edge_list = create_edge_list ();
/* Compute the dominators and post dominators. */
......
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