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mode-switching.c (optimize_mode_switching): Fix bug in MODE_AFTER handling.

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* mode-switching.c (optimize_mode_switching): Fix bug in MODE_AFTER
        handling.

From-SVN: r177068
This commit is contained in:
Joern Rennecke 2011-08-01 18:30:29 +00:00 • committed by Joern Rennecke
parent efd7630c8f
commit a44250f4dd
2 changed files with 11 additions and 2 deletions
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5
gcc/ChangeLog
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@ -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

8
gcc/mode-switching.c
View file

@ -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);