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re PR target/50289 ([avr]: call-prologues saving/restoring global register variables) 

PR target/50289
	* config/avr/avr.c (sequent_regs_live): Don't recognize sequences
	that contain global register variable.

From-SVN: r178528
This commit is contained in:
Georg-Johann Lay 2011-09-05 12:20:03 +00:00 committed by Georg-Johann Lay
parent e1ab3876d2
commit 1e3a7e8662
2 changed files with 17 additions and 0 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2011-09-05 Georg-Johann Lay <avr@gjlay.de>
PR target/50289
* config/avr/avr.c (sequent_regs_live): Don't recognize sequences
that contain global register variable.
2011-09-05 Richard Guenther <rguenther@suse.de>
* tree-cfg.c (replace_uses_by): Use fold_stmt, not fold_stmt_inplace.

11
gcc/config/avr/avr.c
View File

@ -522,6 +522,17 @@ sequent_regs_live (void)
for (reg = 0; reg < 18; ++reg)
{
if (fixed_regs[reg])
{
/* Don't recognize sequences that contain global register
variables. */
if (live_seq != 0)
return 0;
else
continue;
}
if (!call_used_regs[reg])
{
if (df_regs_ever_live_p (reg))