From 8b6c38ef6a7a8cc1f7cc2ff86a686e07ceab1641 Mon Sep 17 00:00:00 2001 From: Eric Botcazou Date: Tue, 14 Mar 2023 10:39:11 +0100 Subject: [PATCH] Revert latest change to emit_group_store This pessimizes on targets with insv instructions. gcc/ PR rtl-optimization/107762 * expr.cc (emit_group_store): Revert latest change. --- gcc/expr.cc | 17 +++++++---------- 1 file changed, 7 insertions(+), 10 deletions(-) diff --git a/gcc/expr.cc b/gcc/expr.cc index 78d35297e755..f8f5cc5a6ca6 100644 --- a/gcc/expr.cc +++ b/gcc/expr.cc @@ -2902,16 +2902,14 @@ emit_group_store (rtx orig_dst, rtx src, tree type ATTRIBUTE_UNUSED, dst = gen_reg_rtx (outer); /* Make life a bit easier for combine: if the first element of the - vector is the word (or larger) low part of the destination mode, - use a paradoxical subreg to initialize the destination. */ + vector is the low part of the destination mode, use a paradoxical + subreg to initialize the destination. */ if (start < finish) { inner = GET_MODE (tmps[start]); bytepos = subreg_lowpart_offset (inner, outer); - if (known_ge (GET_MODE_BITSIZE (inner), BITS_PER_WORD) - && known_eq (rtx_to_poly_int64 (XEXP (XVECEXP (src, 0, - start), 1)), - bytepos)) + if (known_eq (rtx_to_poly_int64 (XEXP (XVECEXP (src, 0, start), 1)), + bytepos)) { temp = simplify_gen_subreg (outer, tmps[start], inner, 0); if (temp) @@ -2929,10 +2927,9 @@ emit_group_store (rtx orig_dst, rtx src, tree type ATTRIBUTE_UNUSED, { inner = GET_MODE (tmps[finish - 1]); bytepos = subreg_lowpart_offset (inner, outer); - if (known_ge (GET_MODE_BITSIZE (inner), BITS_PER_WORD) - && known_eq (rtx_to_poly_int64 (XEXP (XVECEXP (src, 0, - finish - 1), 1)), - bytepos)) + if (known_eq (rtx_to_poly_int64 (XEXP (XVECEXP (src, 0, + finish - 1), 1)), + bytepos)) { temp = simplify_gen_subreg (outer, tmps[finish - 1], inner, 0); if (temp) -- 2.47.2