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re PR rtl-optimization/71374 (ICE on valid code at -O1 and above on x86_64-linux-gnu: in extract_constrain_insn, at recog.c:2190) 

2017-01-27  Vladimir Makarov  <vmakarov@redhat.com>

	PR tree-optimization/71374
	* lra-constraints.c (check_conflict_input_operands): New.
	(match_reload): Use it.

2017-01-27  Vladimir Makarov  <vmakarov@redhat.com>

	PR tree-optimization/71374
	* testsuite/gcc.target/i386/pr71374.c: New.

From-SVN: r244991
This commit is contained in:
Vladimir Makarov 2017-01-27 18:08:14 +00:00 committed by Vladimir Makarov
parent 9e2ea13ec2
commit d8321b33d3
4 changed files with 51 additions and 2 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2017-01-27 Vladimir Makarov <vmakarov@redhat.com>
PR tree-optimization/71374
* lra-constraints.c (check_conflict_input_operands): New.
(match_reload): Use it.
2017-01-27 Vladimir Makarov <vmakarov@redhat.com>
PR target/79131

34
gcc/lra-constraints.c
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@ -878,6 +878,29 @@ regno_val_use_in (unsigned int regno, rtx x)
return NULL_RTX;
}
/* Return true if all current insn non-output operands except INS (it
has a negaitve end marker) do not use pseudos with the same value
as REGNO. */
static bool
check_conflict_input_operands (int regno, signed char *ins)
{
int in;
int n_operands = curr_static_id->n_operands;
for (int nop = 0; nop < n_operands; nop++)
if (! curr_static_id->operand[nop].is_operator
&& curr_static_id->operand[nop].type != OP_OUT)
{
for (int i = 0; (in = ins[i]) >= 0; i++)
if (in == nop)
break;
if (in < 0
&& regno_val_use_in (regno, *curr_id->operand_loc[nop]) != NULL_RTX)
return false;
}
return true;
}
/* Generate reloads for matching OUT and INS (array of input operand
numbers with end marker -1) with reg class GOAL_CLASS, considering
output operands OUTS (similar array to INS) needing to be in different
@ -917,7 +940,9 @@ match_reload (signed char out, signed char *ins, signed char *outs,
pseudos as reload pseudos can die although original
pseudos still live where reload pseudos dies. */
if (REG_P (in_rtx) && (int) REGNO (in_rtx) < lra_new_regno_start
&& find_regno_note (curr_insn, REG_DEAD, REGNO (in_rtx)))
&& find_regno_note (curr_insn, REG_DEAD, REGNO (in_rtx))
&& (!early_clobber_p
|| check_conflict_input_operands(REGNO (in_rtx), ins)))
lra_assign_reg_val (REGNO (in_rtx), REGNO (reg));
}
else
@ -947,7 +972,10 @@ match_reload (signed char out, signed char *ins, signed char *outs,
&& (int) REGNO (subreg_reg) < lra_new_regno_start
&& GET_MODE (subreg_reg) == outmode
&& SUBREG_BYTE (in_rtx) == SUBREG_BYTE (new_in_reg)
&& find_regno_note (curr_insn, REG_DEAD, REGNO (subreg_reg)))
&& find_regno_note (curr_insn, REG_DEAD, REGNO (subreg_reg))
&& (! early_clobber_p
|| check_conflict_input_operands (REGNO (subreg_reg),
ins)))
lra_assign_reg_val (REGNO (subreg_reg), REGNO (reg));
}
}
@ -1002,6 +1030,8 @@ match_reload (signed char out, signed char *ins, signed char *outs,
= (! early_clobber_p && ins[1] < 0 && REG_P (in_rtx)
&& (int) REGNO (in_rtx) < lra_new_regno_start
&& find_regno_note (curr_insn, REG_DEAD, REGNO (in_rtx))
&& (! early_clobber_p
|| check_conflict_input_operands (REGNO (in_rtx), ins))
&& (out < 0
|| regno_val_use_in (REGNO (in_rtx), out_rtx) == NULL_RTX)
&& !out_conflict

5
gcc/testsuite/ChangeLog
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@ -1,3 +1,8 @@
2017-01-27 Vladimir Makarov <vmakarov@redhat.com>
PR tree-optimization/71374
* testsuite/gcc.target/i386/pr71374.c: New.
2017-01-27 Martin Sebor <msebor@redhat.com>
PR c++/71290

8
gcc/testsuite/gcc.target/i386/pr71374.c Normal file
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@ -0,0 +1,8 @@
/* { dg-do compile } */
/* { dg-options "-O2" } */
int a, b, c;
void
foo (void *x, void *y)
{
__asm__ ("": "=&c" (a), "=&D" (b), "=&S" (c): "r" (y), "2" (y));
}