diff options
| author | Uros Bizjak <ubizjak@gmail.com> | 2012-11-05 19:46:31 +0000 |
|---|---|---|
| committer | Uros Bizjak <ubizjak@gmail.com> | 2012-11-05 19:46:31 +0000 |
| commit | d5a87cc6560e129b5994a2ab7fa02fd75b372d88 (patch) | |
| tree | 033e1f770ad19a6394eaed9b596b3483d80fd1bc /gcc/mode-switching.c | |
| parent | 3ac8df77dff8dc8b4ceeba35c618c2667d324255 (diff) | |
* mode-switching.c (create_pre_exit): Force late switching if
__builtin_{apply,return} emitted a load that require mode,
other than MODE_EXIT.
git-svn-id: https://gcc.gnu.org/svn/gcc/trunk@193182 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/mode-switching.c')
| -rw-r--r-- | gcc/mode-switching.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/gcc/mode-switching.c b/gcc/mode-switching.c index d9f83ca2a3b..2f7455a033c 100644 --- a/gcc/mode-switching.c +++ b/gcc/mode-switching.c @@ -1,6 +1,6 @@ /* CPU mode switching Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2007, 2008, - 2009, 2010 Free Software Foundation, Inc. + 2009, 2010, 2012 Free Software Foundation, Inc. This file is part of GCC. @@ -342,6 +342,16 @@ create_pre_exit (int n_entities, int *entity_map, const int *num_modes) } if (j >= 0) { + /* __builtin_return emits a sequence of loads to all + return registers. One of them might require + another mode than MODE_EXIT, even if it is + unrelated to the return value, so we want to put + the final mode switch after it. */ + if (maybe_builtin_apply + && targetm.calls.function_value_regno_p + (copy_start)) + forced_late_switch = 1; + /* For the SH4, floating point loads depend on fpscr, thus we might need to put the final mode switch after the return value copy. That is still OK, |