From 5261cf8ce824bfc75eb6f12ad5e3716c085b6f9a Mon Sep 17 00:00:00 2001 From: "Vladimir N. Makarov" Date: Thu, 4 Jun 2020 12:04:48 -0400 Subject: [PATCH] Add processing STRICT_LOW_PART for matched reloads. 2020-06-04 Vladimir Makarov 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. --- gcc/lra-constraints.c | 2 ++ gcc/lra.c | 7 +++++-- 2 files changed, 7 insertions(+), 2 deletions(-) diff --git a/gcc/lra-constraints.c b/gcc/lra-constraints.c index bf6d4a2..421c453 100644 --- a/gcc/lra-constraints.c +++ b/gcc/lra-constraints.c @@ -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 (); diff --git a/gcc/lra.c b/gcc/lra.c index 3435cff..caa09d8 100644 --- a/gcc/lra.c +++ b/gcc/lra.c @@ -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) -- 2.7.4