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re PR rtl-optimization/79949 (ICE in Max. number of generated reload insns per insn is achieved (90))

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2017-03-09  Vladimir Makarov  <vmakarov@redhat.com>

	PR rtl-optimization/79949
	* lra-constraints.c (process_alt_operands): Check memory when
	trying to predict a cycle.  Print about the overall increase.

From-SVN: r246003
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Vladimir Makarov 2017-03-09 14:43:17 +00:00 committed by Vladimir Makarov
parent 16967aff7a
commit 9125b9fc80
2 changed files with 15 additions and 4 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2017-03-09 Vladimir Makarov <vmakarov@redhat.com>
PR rtl-optimization/79949
* lra-constraints.c (process_alt_operands): Check memory when
trying to predict a cycle. Print about the overall increase.
2017-03-09 Richard Biener <rguenther@suse.de>
PR middle-end/79971

13
gcc/lra-constraints.c
View File

@ -2766,13 +2766,15 @@ process_alt_operands (int only_alternative)
&& REG_P (no_subreg_reg_operand[1])
/* Check that we reload memory not the memory
address. */
&& !curr_alt_offmemok[0]
&& ! (curr_alt_offmemok[0]
&& MEM_P (no_subreg_reg_operand[0]))
&& reg_in_class_p (no_subreg_reg_operand[1], curr_alt[0]))
|| (curr_alt_win[0] && ! curr_alt_win[1]
&& REG_P (no_subreg_reg_operand[0])
/* Check that we reload memory not the memory
address. */
&& !curr_alt_offmemok[1]
&& ! (curr_alt_offmemok[1]
&& MEM_P (no_subreg_reg_operand[1]))
&& reg_in_class_p (no_subreg_reg_operand[0], curr_alt[1])
&& (! CONST_POOL_OK_P (curr_operand_mode[1],
no_subreg_reg_operand[1])
@ -2785,8 +2787,11 @@ process_alt_operands (int only_alternative)
&& GET_CODE (no_subreg_reg_operand[1]) != PLUS)))
{
/* We have a move insn and a new reload insn will be similar
to the current insn. We should avoid such situation as it
results in LRA cycling. */
to the current insn. We should avoid such situation as
it results in LRA cycling. */
if (lra_dump_file != NULL)
fprintf (lra_dump_file,
" Cycle danger: overall += LRA_MAX_REJECT\n");
overall += LRA_MAX_REJECT;
}
ok_p = true;