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| author | Joern Rennecke <joern.rennecke@embecosm.com> | 2011-08-01 18:30:29 +0000 |
|---|---|---|
| committer | Joern Rennecke <amylaar@gcc.gnu.org> | 2011-08-01 19:30:29 +0100 |
| commit | a44250f4ddeaebd81dd799ae549b50751e016ae8 (patch) | |
| tree | fa29950db4e13bd00431984eaf6e64a3fd9e0d45 /gcc/mode-switching.c | |
| parent | efd7630c8ff4bedf1f0e2afc072657c1da302834 (diff) | |
| download | gcc-a44250f4ddeaebd81dd799ae549b50751e016ae8.zip gcc-a44250f4ddeaebd81dd799ae549b50751e016ae8.tar.gz gcc-a44250f4ddeaebd81dd799ae549b50751e016ae8.tar.bz2 | |
mode-switching.c (optimize_mode_switching): Fix bug in MODE_AFTER handling.
* mode-switching.c (optimize_mode_switching): Fix bug in MODE_AFTER
handling.
From-SVN: r177068
Diffstat (limited to 'gcc/mode-switching.c')
| -rw-r--r-- | gcc/mode-switching.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/gcc/mode-switching.c b/gcc/mode-switching.c index 9b11842..7ea241c 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); |