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backport: sel-sched.c (mark_unavailable_hard_regs): Do not try to search available registers when failed to discover LHS register class. 

Backport from mainline:
 2010-01-14  Alexander Monakov  <amonakov@ispras.ru>

        * sel-sched.c (mark_unavailable_hard_regs): Do not try to search
        available registers when failed to discover LHS register class.
        Fix indentation.  Update comment.

From-SVN: r163509
This commit is contained in:
Andrey Belevantsev 2010-08-24 13:03:31 +04:00 committed by Andrey Belevantsev
parent 7bb3593c93
commit 2e84372e2f
2 changed files with 19 additions and 10 deletions
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9
gcc/ChangeLog
View File

@ -1,3 +1,12 @@
2010-08-24 Andrey Belevantsev <abel@ispras.ru>
Backport from mainline:
2010-01-14 Alexander Monakov <amonakov@ispras.ru>
* sel-sched.c (mark_unavailable_hard_regs): Do not try to search
available registers when failed to discover LHS register class.
Fix indentation. Update comment.
2010-08-24 Andrey Belevantsev <abel@ispras.ru>
Backport from mainline:

20
gcc/sel-sched.c
View File

@ -1228,19 +1228,19 @@ mark_unavailable_hard_regs (def_t def, struct reg_rename *reg_rename_p,
if (!reload_completed && !HARD_REGISTER_NUM_P (regno))
return;
mode = GET_MODE (orig_dest);
if (reload_completed)
cl = get_reg_class (def->orig_insn);
/* Stop when mode is not supported for renaming. Also can't proceed
if the original register is one of the fixed_regs, global_regs or
frame pointer. */
if (fixed_regs[regno]
/* Stop if the original register is one of the fixed_regs, global_regs or
frame pointer, or we could not discover its class. */
if (fixed_regs[regno]
|| global_regs[regno]
#if FRAME_POINTER_REGNUM != HARD_FRAME_POINTER_REGNUM
|| (frame_pointer_needed && regno == HARD_FRAME_POINTER_REGNUM)
|| (frame_pointer_needed && regno == HARD_FRAME_POINTER_REGNUM)
#else
|| (frame_pointer_needed && regno == FRAME_POINTER_REGNUM)
|| (frame_pointer_needed && regno == FRAME_POINTER_REGNUM)
#endif
)
|| (reload_completed && cl == NO_REGS))
{
SET_HARD_REG_SET (reg_rename_p->unavailable_hard_regs);
@ -1295,11 +1295,11 @@ mark_unavailable_hard_regs (def_t def, struct reg_rename *reg_rename_p,
/* Leave regs as 'available' only from the current
register class. */
cl = get_reg_class (def->orig_insn);
gcc_assert (cl != NO_REGS);
COPY_HARD_REG_SET (reg_rename_p->available_for_renaming,
reg_class_contents[cl]);
mode = GET_MODE (orig_dest);
/* Leave only registers available for this mode. */
if (!sel_hrd.regs_for_mode_ok[mode])
init_regs_for_mode (mode);