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re PR rtl-optimization/72778 (internal compiler error: in create_pre_exit, at mode-switching.c:451)

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2016-08-02  Vladimir Makarov  <vmakarov@redhat.com>

	PR middle-end/72778
	* lra-spills.c (regno_in_use_p): New.
	(lra_final_code_change): Use it.

From-SVN: r239000
This commit is contained in:
Vladimir Makarov 2016-08-02 20:57:04 +00:00 • committed by Vladimir Makarov
parent 589a30d1a4
commit 00803109af
2 changed files with 22 additions and 6 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2016-08-02 Vladimir Makarov <vmakarov@redhat.com>
PR middle-end/72778
* lra-spills.c (regno_in_use_p): New.
(lra_final_code_change): Use it.
2016-08-02 Vladimir Makarov <vmakarov@redhat.com>
PR rtl-optimization/69847

22
gcc/lra-spills.c
View file

@ -686,6 +686,20 @@ return_regno_p (unsigned int regno)
return false;
}
/* Return true if REGNO is one of subsequent USE after INSN. */
static bool
regno_in_use_p (rtx_insn *insn, unsigned int regno)
{
while ((insn = next_nondebug_insn (insn)) != NULL_RTX
&& INSN_P (insn) && GET_CODE (PATTERN (insn)) == USE)
{
if (REG_P (XEXP (PATTERN (insn), 0))
&& regno == REGNO (XEXP (PATTERN (insn), 0)))
return TRUE;
}
return false;
}
/* Final change of pseudos got hard registers into the corresponding
hard registers and removing temporary clobbers. */
void
@ -693,7 +707,7 @@ lra_final_code_change (void)
{
int i, hard_regno;
basic_block bb;
rtx_insn *insn, *curr, *next_insn;
rtx_insn *insn, *curr;
int max_regno = max_reg_num ();
for (i = FIRST_PSEUDO_REGISTER; i < max_regno; i++)
@ -728,11 +742,7 @@ lra_final_code_change (void)
&& REG_P (SET_SRC (pat)) && REG_P (SET_DEST (pat))
&& REGNO (SET_SRC (pat)) == REGNO (SET_DEST (pat))
&& (! return_regno_p (REGNO (SET_SRC (pat)))
|| (next_insn = next_nondebug_insn (insn)) == NULL_RTX
|| ! INSN_P (next_insn)
|| GET_CODE (PATTERN (next_insn)) != USE
|| ! REG_P (XEXP (PATTERN (next_insn), 0))
|| REGNO (SET_SRC (pat)) != REGNO (XEXP (PATTERN (next_insn), 0))))
|| ! regno_in_use_p (insn, REGNO (SET_SRC (pat)))))
{
lra_invalidate_insn_data (insn);
delete_insn (insn);