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re PR target/88282 (ICE in df_install_refs at gcc/df-scan.c:2379)

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2018-12-06  Vladimir Makarov  <vmakarov@redhat.com>

	PR target/88282
	* ira.c (ira_init_register_move_cost): Use info from
	hard_regno_mode_ok instead of contains_reg_of_mode.
	* ira-costs.c (contains_reg_of_mode): Don't use cost from bigger
	hard register class for some fixed hard registers.

From-SVN: r266862
This commit is contained in:
Vladimir Makarov 2018-12-06 18:41:46 +00:00 committed by Vladimir Makarov
parent 5da8ebe9c6
commit e384094ac2
3 changed files with 17 additions and 22 deletions
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8
gcc/ChangeLog
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@ -1,3 +1,11 @@
2018-12-06 Vladimir Makarov <vmakarov@redhat.com>
PR target/88282
* ira.c (ira_init_register_move_cost): Use info from
hard_regno_mode_ok instead of contains_reg_of_mode.
* ira-costs.c (contains_reg_of_mode): Don't use cost from bigger
hard register class for some fixed hard registers.
2018-12-06 Segher Boessenkool <segher@kernel.crashing.org>
* doc/extend.texi (Using Assembly Language with C): Document asm inline.

19
gcc/ira-costs.c
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@ -1323,14 +1323,6 @@ record_operand_costs (rtx_insn *insn, enum reg_class *pref)
move_costs = ira_register_move_cost[mode];
hard_reg_class = REGNO_REG_CLASS (other_regno);
bigger_hard_reg_class = ira_pressure_class_translate[hard_reg_class];
if (bigger_hard_reg_class == NO_REGS
&& (other_regno == STACK_POINTER_REGNUM
#ifdef STATIC_CHAIN_REGNUM
|| other_regno == STATIC_CHAIN_REGNUM
#endif
|| other_regno == FRAME_POINTER_REGNUM
|| other_regno == HARD_FRAME_POINTER_REGNUM))
bigger_hard_reg_class = GENERAL_REGS;
/* 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
@ -1345,17 +1337,6 @@ record_operand_costs (rtx_insn *insn, enum reg_class *pref)
cost = (i == 0
? move_costs[hard_reg_class][rclass]
: move_costs[rclass][hard_reg_class]);
/* Target code might define wrong big costs for smaller
reg classes or reg classes containing only fixed hard
regs. Try a bigger class. */
if (bigger_hard_reg_class != hard_reg_class)
{
int cost2 = (i == 0
? move_costs[bigger_hard_reg_class][rclass]
: move_costs[rclass][bigger_hard_reg_class]);
if (cost2 < cost)
cost = cost2;
}
op_costs[i]->cost[k] = cost * frequency;
/* If we have assigned a class to this allocno in our

12
gcc/ira.c
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@ -1573,11 +1573,17 @@ ira_init_register_move_cost (machine_mode mode)
{
static unsigned short last_move_cost[N_REG_CLASSES][N_REG_CLASSES];
bool all_match = true;
unsigned int cl1, cl2;
unsigned int i, cl1, cl2;
HARD_REG_SET ok_regs;
ira_assert (ira_register_move_cost[mode] == NULL
&& ira_may_move_in_cost[mode] == NULL
&& ira_may_move_out_cost[mode] == NULL);
CLEAR_HARD_REG_SET (ok_regs);
for (i = 0; i < FIRST_PSEUDO_REGISTER; i++)
if (targetm.hard_regno_mode_ok (i, mode))
SET_HARD_REG_BIT (ok_regs, i);
/* Note that we might be asked about the move costs of modes that
cannot be stored in any hard register, for example if an inline
asm tries to create a register operand with an impossible mode.
@ -1586,8 +1592,8 @@ ira_init_register_move_cost (machine_mode mode)
for (cl2 = 0; cl2 < N_REG_CLASSES; cl2++)
{
int cost;
if (!contains_reg_of_mode[cl1][mode]
|| !contains_reg_of_mode[cl2][mode])
if (!hard_reg_set_intersect_p (ok_regs, reg_class_contents[cl1])
|| !hard_reg_set_intersect_p (ok_regs, reg_class_contents[cl2]))
{
if ((ira_reg_class_max_nregs[cl1][mode]
> ira_class_hard_regs_num[cl1])