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* [gcc r13-6659] Revert latest change to emit_group_store
@ 2023-03-14 10:43 Eric Botcazou
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From: Eric Botcazou @ 2023-03-14 10:43 UTC (permalink / raw)
To: gcc-cvs
https://gcc.gnu.org/g:8b6c38ef6a7a8cc1f7cc2ff86a686e07ceab1641
commit r13-6659-g8b6c38ef6a7a8cc1f7cc2ff86a686e07ceab1641
Author: Eric Botcazou <ebotcazou@adacore.com>
Date: Tue Mar 14 10:39:11 2023 +0100
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.
Diff:
---
gcc/expr.cc | 17 +++++++----------
1 file changed, 7 insertions(+), 10 deletions(-)
diff --git a/gcc/expr.cc b/gcc/expr.cc
index 78d35297e75..f8f5cc5a6ca 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)
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