diff options
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/mode-switching.c | 8 |
2 files changed, 11 insertions, 2 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index f03046ed8a0..f098515ac88 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +2011-08-01 Joern Rennecke <joern.rennecke@embecosm.com> + + * mode-switching.c (optimize_mode_switching): Fix bug in MODE_AFTER + handling. + 2011-08-01 H.J. Lu <hongjiu.lu@intel.com> PR target/47766 diff --git a/gcc/mode-switching.c b/gcc/mode-switching.c index 9b11842781c..7ea241cea7b 100644 --- a/gcc/mode-switching.c +++ b/gcc/mode-switching.c @@ -499,6 +499,7 @@ optimize_mode_switching (void) { struct seginfo *ptr; int last_mode = no_mode; + bool any_set_required = false; HARD_REG_SET live_now; REG_SET_TO_HARD_REG_SET (live_now, df_get_live_in (bb)); @@ -527,6 +528,7 @@ optimize_mode_switching (void) if (mode != no_mode && mode != last_mode) { + any_set_required = true; last_mode = mode; ptr = new_seginfo (mode, insn, bb->index, live_now); add_seginfo (info + bb->index, ptr); @@ -548,8 +550,10 @@ optimize_mode_switching (void) } info[bb->index].computing = last_mode; - /* Check for blocks without ANY mode requirements. */ - if (last_mode == no_mode) + /* Check for blocks without ANY mode requirements. + N.B. because of MODE_AFTER, last_mode might still be different + from no_mode. */ + if (!any_set_required) { ptr = new_seginfo (no_mode, BB_END (bb), bb->index, live_now); add_seginfo (info + bb->index, ptr); |