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re PR target/79404 (h8300: ICE at gcc/ira.c:5541 whilst building libgcc)

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PR target/79404
	* ira-costs.c (scan_one_insn): Initialize register move costs
	for pseudos seen in USE/CLOBBER insns.

From-SVN: r245436
This commit is contained in:
Jeff Law 2017-02-14 09:44:33 -07:00 committed by Jeff Law
parent 6fa3b207c3
commit 355930ab26
2 changed files with 21 additions and 1 deletions
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4
gcc/ChangeLog
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@ -4,6 +4,10 @@
2017-02-14 Jeff Law <law@redhat.com>
PR target/79404
* ira-costs.c (scan_one_insn): Initialize register move costs
for pseudos seen in USE/CLOBBER insns.
PR tree-optimization/79095
* tree-vrp.c (extract_range_from_binary_expr_1): For EXACT_DIV_EXPR,
if the numerator has the range ~[0,0] make the resultant range ~[0,0].

18
gcc/ira-costs.c
View File

@ -1438,9 +1438,25 @@ scan_one_insn (rtx_insn *insn)
return insn;
pat_code = GET_CODE (PATTERN (insn));
if (pat_code == USE || pat_code == CLOBBER || pat_code == ASM_INPUT)
if (pat_code == ASM_INPUT)
return insn;
/* If INSN is a USE/CLOBBER of a pseudo in a mode M then go ahead
and initialize the register move costs of mode M.
The pseudo may be related to another pseudo via a copy (implicit or
explicit) and if there are no mode M uses/sets of the original
pseudo, then we may leave the register move costs uninitialized for
mode M. */
if (pat_code == USE || pat_code == CLOBBER)
{
rtx x = XEXP (PATTERN (insn), 0);
if (GET_CODE (x) == REG
&& REGNO (x) >= FIRST_PSEUDO_REGISTER)
ira_init_register_move_cost_if_necessary (GET_MODE (x));
return insn;
}
counted_mem = false;
set = single_set (insn);
extract_insn (insn);