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Add processing STRICT_LOW_PART for matched reloads.

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2020-06-04  Vladimir Makarov  <vmakarov@redhat.com>

	PR middle-end/95464
	* lra.c (lra_emit_move): Add processing STRICT_LOW_PART.
	* lra-constraints.c (match_reload): Use STRICT_LOW_PART in output
	reload if the original insn has it too.
This commit is contained in:
Vladimir N. Makarov 2020-06-04 12:04:48 -04:00
parent ab56390384
commit 5261cf8ce8
2 changed files with 7 additions and 2 deletions
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2
gcc/lra-constraints.c
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@ -1071,6 +1071,8 @@ match_reload (signed char out, signed char *ins, signed char *outs,
if (find_reg_note (curr_insn, REG_UNUSED, out_rtx) == NULL_RTX)
{
start_sequence ();
if (out >= 0 && curr_static_id->operand[out].strict_low)
out_rtx = gen_rtx_STRICT_LOW_PART (VOIDmode, out_rtx);
lra_emit_move (out_rtx, copy_rtx (new_out_reg));
emit_insn (*after);
*after = get_insns ();

7
gcc/lra.c
View File

@ -490,13 +490,16 @@ void
lra_emit_move (rtx x, rtx y)
{
int old;
rtx_insn *insn;
if (GET_CODE (y) != PLUS)
{
if (rtx_equal_p (x, y))
return;
old = max_reg_num ();
rtx_insn *insn = emit_move_insn (x, y);
insn = (GET_CODE (x) != STRICT_LOW_PART
? emit_move_insn (x, y) : emit_insn (gen_rtx_SET (x, y)));
/* The move pattern may require scratch registers, so convert them
into real registers now. */
if (insn != NULL_RTX)