OpenE2K/gcc
2
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

(find_reloads) [SMALL_REGISTER_CLASSES]:

Browse Source 
Don't use preferred_class for a multiword register.

From-SVN: r2815
This commit is contained in:
Richard Stallman 1992-11-27 23:52:02 +00:00
parent 33f3c4c086
commit 5aa14feece
1 changed files with 7 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
gcc/reload.c
View File

@ -2685,11 +2685,18 @@ find_reloads (insn, replace, ind_levels, live_known, reload_reg_p)
Don't bother with this if this alternative will accept this
operand.
Don't do this for a multiword operand, if
we have to worry about small classes, because making reg groups
harder to allocate is asking for trouble.
Don't do this if the preferred class has only one register
because we might otherwise exhaust the class. */
if (! win && this_alternative[i] != (int) NO_REGS
#ifdef SMALL_REGISTER_CLASSES
&& GET_MODE_SIZE (operand_mode[i]) <= UNITS_PER_WORD
#endif
&& reg_class_size[(int) preferred_class[i]] > 1)
{
if (! reg_class_subset_p (this_alternative[i],