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re PR bootstrap/88157 (ICE when building libgo encoding/gob.lo starting with r266385)

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2018-11-23  Vladimir Makarov  <vmakarov@redhat.com>

	PR bootstrap/88157
	* ira-costs.c (record_operand_costs): Use bigger hard reg class if
	its mode does not fit to the original class.

From-SVN: r266422
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Vladimir Makarov 2018-11-23 22:00:43 +00:00 committed by Vladimir Makarov
parent 1b8ccb9d55
commit 795a6c676a
2 changed files with 13 additions and 0 deletions
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gcc/ChangeLog
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@ -1,3 +1,9 @@
2018-11-23 Vladimir Makarov <vmakarov@redhat.com>
PR bootstrap/88157
* ira-costs.c (record_operand_costs): Use bigger hard reg class if
its mode does not fit to the original class.
2018-11-23 Martin Sebor <msebor@redhat.com>
PR tree-optimization/87756

7
gcc/ira-costs.c
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@ -1319,6 +1319,13 @@ record_operand_costs (rtx_insn *insn, enum reg_class *pref)
bool dead_p = find_regno_note (insn, REG_DEAD, REGNO (src));
hard_reg_class = REGNO_REG_CLASS (other_regno);
/* Target code may return any cost for mode which does not
fit the the hard reg class (e.g. DImode for AREG on
i386). Check this and use a bigger class to get the
right cost. */
if (! ira_hard_reg_in_set_p (other_regno, mode,
reg_class_contents[hard_reg_class]))
hard_reg_class = ira_pressure_class_translate[hard_reg_class];
i = regno == (int) REGNO (src) ? 1 : 0;
for (k = cost_classes_ptr->num - 1; k >= 0; k--)
{