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bfin.c (struct machine_function): New member has_loopreg_clobber. 

* config/bfin/bfin.c (struct machine_function): New member
	has_loopreg_clobber.
	(bfin_expand_movmem): Set it when generating memcpy insns.
	(n_regs_saved_by_prologue, expand_prologue_reg_save,
	expand_epilogue_reg_restore): If we have hardware loops,
	memcpy insns (indicated by has_loopreg_clobber) or function
	calls, we need to save the loop registers.

From-SVN: r141425
This commit is contained in:
Bernd Schmidt 2008-10-29 15:12:28 +00:00 committed by Bernd Schmidt
parent 7e51fe23ab
commit a848cf52b5
2 changed files with 44 additions and 3 deletions
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10
gcc/ChangeLog
View File

@ -1,3 +1,13 @@
2008-10-29 Bernd Schmidt <bernd.schmidt@analog.com>
* config/bfin/bfin.c (struct machine_function): New member
has_loopreg_clobber.
(bfin_expand_movmem): Set it when generating memcpy insns.
(n_regs_saved_by_prologue, expand_prologue_reg_save,
expand_epilogue_reg_restore): If we have hardware loops,
memcpy insns (indicated by has_loopreg_clobber) or function
calls, we need to save the loop registers.
2008-10-28 H.J. Lu <hongjiu.lu@intel.com>
* config/i386/i386.c (core2_cost): Fix typos in comments.

37
gcc/config/bfin/bfin.c
View File

@ -60,7 +60,11 @@
This is added to the cfun structure. */
struct machine_function GTY(())
{
/* Set if we are notified by the doloop pass that a hardware loop
was created. */
int has_hardware_loops;
/* Set if we create a memcpy pattern that uses loop registers. */
int has_loopreg_clobber;
};
/* Test and compare insns in bfin.md store the information needed to
@ -544,7 +548,16 @@ expand_prologue_reg_save (rtx spreg, int saveall, bool is_inthandler)
if (saveall || is_inthandler)
{
rtx insn = emit_move_insn (predec, gen_rtx_REG (SImode, REG_ASTAT));
RTX_FRAME_RELATED_P (insn) = 1;
if (! current_function_is_leaf
|| cfun->machine->has_hardware_loops
|| cfun->machine->has_loopreg_clobber)
for (dregno = REG_LT0; dregno <= REG_LB1; dregno++)
{
insn = emit_move_insn (predec, gen_rtx_REG (SImode, dregno));
RTX_FRAME_RELATED_P (insn) = 1;
}
}
if (total_consec != 0)
@ -714,7 +727,15 @@ expand_epilogue_reg_restore (rtx spreg, bool saveall, bool is_inthandler)
RTX_FRAME_RELATED_P (insn) = 1;
}
if (saveall || is_inthandler)
emit_move_insn (gen_rtx_REG (SImode, REG_ASTAT), postinc);
{
if (! current_function_is_leaf
|| cfun->machine->has_hardware_loops
|| cfun->machine->has_loopreg_clobber)
for (regno = REG_LB1; regno >= REG_LT0; regno--)
emit_move_insn (gen_rtx_REG (SImode, regno), postinc);
emit_move_insn (gen_rtx_REG (SImode, REG_ASTAT), postinc);
}
}
/* Perform any needed actions needed for a function that is receiving a
@ -813,8 +834,16 @@ n_regs_saved_by_prologue (void)
}
if (fkind != SUBROUTINE || all)
/* Increment once for ASTAT. */
n++;
{
/* Increment once for ASTAT. */
n++;
if (! current_function_is_leaf
|| cfun->machine->has_hardware_loops
|| cfun->machine->has_loopreg_clobber)
{
n += 6;
}
}
if (fkind != SUBROUTINE)
{
@ -3398,6 +3427,7 @@ bfin_expand_movmem (rtx dst, rtx src, rtx count_exp, rtx align_exp)
countreg = copy_to_mode_reg (Pmode, GEN_INT (new_count));
emit_insn (gen_rep_movsi (destreg, srcreg, countreg, destreg, srcreg));
cfun->machine->has_loopreg_clobber = true;
}
if (count & 2)
{
@ -3418,6 +3448,7 @@ bfin_expand_movmem (rtx dst, rtx src, rtx count_exp, rtx align_exp)
countreg = copy_to_mode_reg (Pmode, GEN_INT (new_count));
emit_insn (gen_rep_movhi (destreg, srcreg, countreg, destreg, srcreg));
cfun->machine->has_loopreg_clobber = true;
}
}
if (count & 1)